Brown fused alumina purposes
Brown fused alumina called industrial teeth: mainly used in refractory materials, grinding wheel, sand blasting.
1. Sand corundum, sandblasting abrasive hardness is moderate, the bulk density is high, no free silica, than major, good toughness and okay brown fused alumina is the ideal "environmental protection" type sand blasting materials, widely used in aluminum, copper profile glass, washing jeans precision molds, and other fields;
2. The free abrasive, abrasive abrasive, applied to the tube, optical glass, monocrystalline silicon, lenses, clocks with glass, crystal glass, jade in areas such as free grinding, grinding is adopted widely in the domestic advanced materials; 3. The resin abrasive, abrasive has color appropriate, good hardness and toughness, suitable particle cross section type and keeping degree blade, used in resin abrasive, effect is ideal;
4) is coated with abrasive, abrasive abrasive paper, gauze and other manufacturers of production materials;
5. Brown fused alumina filler - is mainly used for automobile brake parts, special tires, special construction products such as led can be used as building highway pavement, airport runway, docks, car parks, industrial floor, wear-resisting material such as sports venues;
6. Filter medium, is a new kind of application field, abrasive using granular grinding for the bottom of the medium filter bed, purify drinking water or wastewater, is a new type of water filtration materials at home and abroad, especially suitable for non-ferrous metal processing, oil drilling mud weighting agent:
7. Hydraulic cutting - an abrasive abrasive cutting medium, rely on high pressure water jet cutting, basic application in the oil (gas) pipe, steel components, such as cutting, is a new type, environmental protection, safe way of cutting. Customer base: washed denim sandblasting room of shipyard shipyard steel structure factory powder factory our sandpaper, ShaBuChang crystal glass industry building floor steel hardware industry electronics qi car manufacturing coast terminals, hospital stadium parking lot. Sand industry cooperation content to all types of users such as the floor aggregate and abrasive.
8. The product is reliable, stable performance, good quality, easy to use.
Properties and advantages of white fused alumina
1, does not affect the color of the processed parts;
2, can be prohibited in the process of using iron powder residue to sand blasting;
3, micro powder grade is very suitable for wet sand blasting and polishing operation;
4, fast processing speed, high quality;
5, the amount of iron oxide is extremely low suitable for the sand blasting operation is strictly prohibited;
Physical and chemical index
Chemical index
Physical index
Al2O3
More than 95%
Knoop hardness
2000-2200Kg/mm2
Fe2O3
Less than or equal to 0.4%
Mohs hardness
Nine
Na2O
Less than or equal to 0.22%
Bulk density
1.53-1.99g/cm3
SiO2
Less than or equal to 0.04%
True density
3.9-4.9g/cm3
White corundum purpose
1, can be used in all kinds of sand blasting and polishing (Lapping) operation;
2, Boli or acrylic crafts aesthetic feeling of atomization processing;
3, the TV screen in the process of blasting;
4, the silicon wafer cutting;
5, tooth mold cleaning sand blasting;
6, precision casting sand;
7, advanced refractories and other ceramic additives.
The removal of 8, electronic parts, core flash, eliminate processing
White corundum application field
White corundum abrasives are suitable for all kinds of high-end product, process or beautify processing, hardware and other products surface after sand blasting surface clean without any impurities, cleaning trouble. Fine white corundum can be used for polishing. White corundum used as additive in various products. White corundum as a solid and coated with abrasive, wet or dry, or spray sand, suitable for crystal, ultra precision grinding and polishing in electronics industry and making high-grade refractory materials, etc. White corundum is suitable for machining hardened steel, alloy steel, high speed steel, high carbon steel hardness is harder, such as tensile strength of the larger materials. White corundum used as touch media, insulator and precision casting sand, etc. White corundum used for iron artifacts to rust, dirt, scale, increasing the coating, coating adhesion; White corundum used in aluminum workpiece to scale, surface strengthening, finishing effect; White jade for the bronze artifacts to skin inferior smooth effect, glass crystal frosted plastic, engraved designs, inferior smooth effect, special fabrics such as denim fluffy effect of processing and design.
Summary
Spodumene is monoclinic crystal shape, often Chengzhu, granular or plate. Color is gray, gray green, purple or yellow, hardness 6.5-7, density 3.03-3.22g/cm3. As a raw material for lithium chemical products, widely used in lithium chemical, glass, ceramic industry, enjoy the "industrial monosodium glutamate" in the world.
Use of lithium
Ceramic industry: in the ceramic body adding spodumene can improve ceramic products, the strength, density, acid resistance and thermal shock resistance, can reduce the water absorption rate and linear shrinkage rate. Adding the right amount of spodumene in glazes and frits, can reduce the coefficient of thermal expansion (CTE products, glaze to improve the high temperature flow, reduce the viscosity and improve the glazed whiteness, gloss, hardness, and corrosion resistance, improve the grade of products. At the same time, the products with finished product appearance, and durable, scrap rate low characteristic.
Second, metallurgical industry: in metallurgical and foundry sand adding spodumene to eliminate casting veining defect, reduce or eliminate casting thermal expansion defects, defects of gas, and the role of anti sticking sand; after adding spodumene in continuous casting protecting slag to reduce the melting temperature of the slag, reduce the high temperature viscosity, lubrication condition optimization, can inhibit the casting under the high temperature oxidation, carbonization.
After three, refractory industry: in refractory material adding spodumene can reduce the sintering temperature, so it is refractory industry preferred sintering mineralizer; refractories mechanical strength, thermal shock resistance and volume stability can be improved; can enhance the refractory corrosion resistance of high temperature, prolong the service life of the refractory; widely used in Mo mullite, cordierite shed plate, crucible, sagger, heat plate temperature refractories and refractory castable, plastics, mending material, spray coating, adhesive, paint and other unshaped refractory materials.
Resistant to the ball of fire
Refractory ball is a kind of refractory material with a very wide range of applications. Refractory ceramic ball is made of industrial alumina and refractory kaolin as the main raw material, which is made by scientific formula, shaping and high temperature sintering.
Refractory ball has high mechanical strength, long service cycle, high temperature resistance, oxidation resistance, wear resistance, strong acid and alkali chemical corrosion, excellent resistance to quench heat and very low chemical activity.
Fire resistant classification
1, according to the aluminum content
Ordinary refractory ball: suitable for converter sulfuric acid and the chemical fertilizer industry and transform furnace
High aluminum refractory ball: high aluminum resistance to the fire, the application of urea, steel and other industries, such as hot blast furnace, heating transformation furnace and other equipment.
2, by type
Refractory ball: aluminum content 45-90, 10-70 silicon content, iron content is less than 1.
Corundum refractory ball: aluminum content 90-98, 0.5-5.0 silicon content, iron content is less than 0.5.
Low silicon aluminum refractory ball: the contents of 90-98, silicon content is less than 0.3, iron content is less than 1.
Physical and chemical index
project
Al2O3 (%); or
Sixty-five
Seventy
Seventy-five
Eighty-five
Volume density (g/cm32)
Two point two
Two point three
Two point five
Two point eight
Bulk density (M3 Kg/)
1550 ~ 1600
1600 ~ 1650
1600 ~ 1750
1650 ~ 1700
Specific surface area (M3 m2/)
200 ~ 220
The coefficient of thermal expansion (3) (x = 10-6/ C);
Six
Six point five
Seven
Eight
Resistant ball use
Common refractory ball used in sulfuric acid and fertilizer industry of high and low temperature shift furnace, reformer, hydrogenation, desulfurization tank and methanation furnace and dispersed liquid, and supporting, covering and protecting catalyst.
High aluminum resistance ball is suitable for hot blast stove, heating transformation furnace and other equipment in urea, steel and other industries.
Recarburizer used
In the smelting process, due to the ingredients or improper loading and decarbonization excess and other reasons, sometimes resulting in steel carbon content did not reach the top of the requirements, then to the carburization of molten steel. Recarburizer used a carbon electrode, iron powder, petroleum coke powder, charcoal powder and coke powder. Smelting, high carbon steel, containing less impurities in oil Jiaozuo carburetant. The top blown converter steelmaking carburant is high fixed carbon, ash, volatile matter, sulfur, phosphorus and nitrogen impurity content is low, and dry, clean, moderate granularity.
1 furnace input method:
Recarburizer used in induction furnace for melting, but the specific use according to the technological requirements are not the same.
(1) used in the intermediate frequency electric furnace smelting carburant, according to the ratio of and carbon equivalent requirements with the mixture into furnace in the middle and lower part and recovery rate can reach more than 95%;
(2) if the lack of adjustment of carbon carbon content when it first hit the net furnace slag, plus carburant, by raising the temperature of molten iron, electromagnetic stirring or artificial stir to dissolve carbon absorption, recycling rate in about 90%, if the use of low-temperature carbonization process, the melt furnace charge only a part of, the molten iron temperature lower, all recarburizer one-time addition of iron liquid, also with solid charge will pressing it into the liquid iron does not let its exposed out of the surface of the molten iron. The method of iron liquid carbon can reach more than 1%.
2 external carbon furnace:
(1) package of graphite powder spraying
Choose recarburizer graphite powder, blow into the amount of 40kg/t, is expected to make iron carbon content increases from 2% to 3%. With the carbon content in liquid iron is increased, decreased utilization of carbon, carbon before the molten iron temperature is 1600 degrees centigrade, the average is 1299 DEG C after carburizing. Graphite powder spray carbonization, generally uses nitrogen as a carrier, but under the condition of industrial production, it is more convenient to use compressed air, and the compression of oxygen in the air generated by the combustion of CO
(2) when the iron using recarburizer
Can be 100 - 300 to graphite powder carburizing agent into the bag, or from the iron tank with flow into, the end of the liquid iron after fully mixing, as far as possible to dissolve carbon absorption, carbon recovery rate in about 50%.
Coal powder.
Coal, referred to as coal, is the ancient plant remains, buried in the ground, through the earth's crust to isolate the air pressure and temperature conditions, resulting in the carbonation of fossil minerals, mainly used as a fuel for human.
Coal for industrial modernization, whether it is heavy industry, light industry; both the energy industry, metallurgy industry, chemical industry, machinery industry, or textile industry, food industry, transportation play an important role
Coal powder characteristics
Compared with ordinary pulverized coal, coal powder produced by our plant has the following advantages:
1, bright carbon value, volatile and char residue high characteristic, ash content, low gas, a wide range of gas temperature, anti sticking sand and anti clip sand ability etc. advantages.
2, add a little amount, can reduce the sand clay content and water content, sand and new supplement and bentonite usage and improve the sand permeability, mobility and flexibility, especially to prevent casting of sticky sand, sand inclusion, blowhole defect have unique effect.
Physical and chemical index
Product Name
Quantity of heat
Volatile parts
Sour
ash content
Water content
Fixed carbon
coal
About 6000-8000 calories
About 10%
About 0.3
About 8
About 6
More than 70%
Mechanism of coal dust preventing sand sticking
1, in molten metal under the action of high temperature mold surface of pulverized coal produced a large reduction of the gas, to prevent oxidation of the molten iron, and iron on the surface of iron oxide reduction, reduction of metal oxides and sand the possibility of chemical reaction. In the cavity, the reducing gas mainly comes from the volatile matter of coal powder
2, after the heating of coal began to soften, with plasticity. If by the beginning of softening to curing between relatively wide temperature range and time long, buffer quartz grains in the heat, the temperature interval and the formation of expansion stress, which can reduce the casting defects caused by thermal expansion of the sand.
3, the pulverized coal after heated gas, liquid and solid three-phase colloid, colloid volume expansion part jam pore between grains, molten iron is difficult to penetrate.
4, pulverized coal in the heat generated by the carbon hydride (mainly aromatic volatile points in 650 DEG to 100 DEG C high temperature, in a reducing atmosphere in the occurrence of gas phase pyrolysis and on the interface of the liquid metal and mold precipitation layer with fine crystalline carbon luster, known as lustrous carbon.
Chromium oxide green
[Chinese name] chrome oxide green
[English name] oxide green chrome, oxide green chromium
[alias] s N Y N have a Cr2O3 and Hu, R and S
[chemical] Cr2O3
Chrome oxide green by chromic acid, sodium bichromate (or potassium) and sulphur by calcination. The thermal decomposition of the ammonium dichromate or. High temperature resistance, light resistance, resistance to various chemicals. Products of pure natural chlorophyll near infrared reflectance (Al2O3) close to the Mohs hardness only to diamond, corundum. With metallic luster, with magnetic, strong hiding power, high temperature resistant, resistant to sunlight, insoluble in water, soluble in acid, in the atmosphere is relatively stable, did not affect the concentration of acid and alkali and sulfur dioxide gas, is to highlight the excellent quality of pigment and fastness. Insoluble in water, acid and organic solvents, slightly soluble in concentrated sodium hydroxide solution, dissolved in hot sodium bromate solution and heat concentrated perchloric acid solution or boiling parathion mixed acid. The light, atmosphere, and corrosive gases (H2S, SO2, etc.) are extremely stable and good weather resistance. In case of thermal stability, is the quality of refractory materials. Chromic oxide mainly used in metallurgy, paint, polishing, refractory materials and new development of the molten coating etc..
Physical and chemical index
Syngony
Six party system
colour
Green powder
Chemical formula
Cr2O3
molecular weight
One hundred and fifty-one point nine nine
density
5.21g/cm3
Mohs hardness
8.5-9
Refractive index
Two point five
Specific heat
(20 degrees C) /0.17J/ (g, K)
melting point
2265 degrees C
boiling point
3000 degrees C
Chromium oxide green application
Chrome oxide green for smelting metal chromium and chromium carbide, enamel, ceramics, glass, artificial leather, refractory materials, building materials, coloring, catalysts for organic synthesis, manufacturing fast material and the printing of paper money in the special ink, metal polishing abrasive materials, metal surface infiltration chromium, magnetic materials. Used in coatings, ceramics, rubber, fine arts pigments, and camouflage coatings.
Gongyi city hong the refractory material co., LTD
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Polyacrylamide characteristics
1: PAM) flocculation can make the suspended material by charge neutralization, adsorption bridging, flocculating action.
2) adhesion: can be through mechanical, physical, chemical role, play the role of adhesion.
3 resistance: PAM can effectively reduce the friction of the fluid, water to join trace PAM can reduce resistance 80% - 50.
4) thickening: PAM in neutral and acid conditions are thickening effect, when the pH value at 10 C above PAM easy to hydrolysis. When the semi network structure, the thickening will be more obvious.
Polyacrylamide application
Anionic polyacrylamide
1, mainly used as a flocculant: for suspended particles, coarse, high concentration, particle with positive charge, water pH is neutral or alkaline water, due to the anionic polyacrylamide molecular chain containing a certain amount of polar groups to adsorption of solid particles suspended in the water, etc.
2, used in petroleum industry, oil production, drilling mud, waste mud treatment, prevent water channeling, reduce friction, improve oil recovery, the three oil recovery has been widely used.
Two, cationic polyacrylamide
Cationic polyacrylamide in acidic or alkaline media showed positive electricity, it usually is lower than the molecular weight of anionic or non-ionic polyacrylamide, the performance of the Chengcheng clean sewage is mainly obtained by charge neutralization.
Three, non ionic polyacrylamide
Due to its molecular chain containing a certain amount of polar gene can adsorb the suspended solid particles, the particle formation of large flocs, it accelerated the settlement of particles in suspension, have very obvious to speed up the solution to clarify, promote the effect of filtration, widely used in chemical industry waste water, wastewater treatment, municipal sewage treatment.
Four, gender ion polyacrylamide
Product form: gender ion polyacrylamide (ACPAM) appearance is white powder.
Product features: the two gender ion polyacrylamide containing cationic and anionic groups, it has the general characteristics of the use of cationic flocculant, the performance of the more excellent performance.
The main purpose: oil field profile control and water plugging agent, and crosslinking agent, stabilizer, coagulant combined effect, the formation of an important polymer gel and resin gel of high strength agent gel plugging agent.
Adapt to different geological conditions. A variety of oil, organic, inorganic, sewage, complex sewage treatment. PH change in the sewage system for sewage
Sludge dewatering, papermaking additives.
Black corundum performance
Black corundum and low aluminum corundum, blue corundum, is in electric arc furnace, the bauxite made by melting a AL2O3 spinel is given priority to with iron ore phase of the colored crystals, its characteristic is AL2O3 content is lower, and has a certain amount of Fe2O3 (10%), and therefore, moderate hardness and great toughness, self-sharpening, good bonding, high durability, produce less heat when grinding, high temperature resistant, not easy to scratch the surface of the workpiece surface roughness is high. Black corundum and low aluminum corundum, blue corundum, is in electric arc furnace, the bauxite made by melting a AL2O3 spinel is given priority to with iron ore phase of the colored crystals, its characteristic is AL2O3 content is lower, and has a certain amount of Fe2O3 (10%), and therefore, moderate hardness and great toughness, self-sharpening, good bonding, high durability, produce less heat when grinding, high temperature resistant, not easy to scratch the surface of the workpiece surface roughness is high.
Hei Gangyu use
1, free grinding, such as metal parts electroplating before the bottom polishing, aluminum products.
2, bicycles, motorcycles, sewing machines, watches and clocks parts.
Polished 3, lighting, plastic and hardware tools, and is also suitable for sand (rust, glass flower).
4, material processing, manufacturing resin cutting blade, angle grinding and coated abrasives.
5, black corundum sand granularity and powder is particularly suitable for grinding and polishing stainless steel workpieces and oilstone, grinding paste.
6, black corundum section of sand is the preferred material for non slip road and coal pit storage.
Matters needing attention:
1, transport and handling: in the transport process, not drag hook, should prevent mixed with the solid material, strong vibration, friction, hit, hit, forbid throwing should be lightly armed light discharge to reduce black corundum breakage of packing, the impact of the use.
2, storage: should be stored in a cool and dry place, to prevent internal and external packaging bag break, prevent moisture and adsorption of other substances in the air, affect the use effect. It is strictly prohibited to mix with poisonous and harmful gas or volatile matter, and keep away from the source of pollution.
Introduction of mullite
Mullite is a kind of high quality refractory materials, it has a uniform expansion, hot pillow excellent stability, high load softening point, high temperature creep value is small, high hardness, good resistance to chemical corrosion, there are mainly high purity fused mullite, fused mullite sintered mullite, all natural bauxite concentrate and light mullite.
Mullite purposes
Mullite are suitable for all kinds of flame furnace lining work, direct contact information with the flame (not contact information melt), other high temperature heat preservation and heat insulation equipment, such as:
1, the preparation of various lightweight refractory castable, spray coating, etc.;
2, heating furnace, soaking furnace, heat treatment furnace, annealing furnace, ceramic, refractory products sintering furnace, the furnace wall;
3, steam boiler, oil industry tube furnace, ethane cracking furnace lining;
4, all kinds of industrial furnace door, observation hole lining.
Summary
Molecular sieve is a kind of cubic crystal aluminosilicate compounds. Molecular sieve has the advantages of uniform porous structure, the diameter of the aperture size uniform, these holes to the adsorption of molecules smaller than the diameter of the cavity to the internal, and the polar molecules and unsaturated molecules has a preferential adsorption capacity, and are better able to different degrees, different saturation degree, molecular size and the boiling point of different molecules are separated, that is "screening" molecular, the so-called molecular sieve. Molecular sieve has the advantages of high adsorption capacity, high thermal stability, and so on, so that the molecular sieve is widely used.
Molecular sieve classification
3A molecular sieve
Chemical formula:, 1/3Na2O, Al2O3, 2SiO2, 9/2H2O, 2/3K2O
Silicon aluminum ratio: SiO2/ Al2O3 = 2
Effective aperture: about 3A
Application: mainly used for all kinds of liquids (such as ethanol dry, gas drying, dry methane gas, refrigerant drying, unsaturated hydrocarbon and pyrolysis gas, ethylene, acetylene, propylene, butadiene drying, alcohol and all kinds of solvent dehydration.
4A molecular sieves
Chemical formula: Al2O3, 2SiO2, Na2O, 9/2H2O
Silicon aluminum ratio: SiO2/ Al2O3 = 2
Effective aperture: about 4A
Application: mainly used for natural gas and chemical gas and liquid, refrigerants, pharmaceuticals, electronics and materials and volatile substances dry, purified argon, methane, ethane, propane separation.
5A molecular sieves
Chemical formula: 3/4CaO, 1/4Na2O, Al2O3, SiO2 2, 9/2H2O
Silicon aluminum ratio: SiO2/ Al2O3 = 2
Effective aperture: about 5A
Application: it is mainly used for the separation of the isomers of alkanes, oxygen and nitrogen separation, chemical industry, petroleum and natural gas, ammonia decomposition gas and other industrial gases and liquids.
13X molecular sieve
Chemical formula: Al2O3 2.45SiO2 6.OH2O Na2O
Application: industrial gas drying and purification, can also be used as a carrier. Purification of raw gas for air separation unit (simultaneous removal of H2O and CO2). Desulfurization of liquid hydrocarbons and natural petroleum gas (removal of hydrogen sulfide and thiol).
Anode block
The anode block is used in the 18 groove of the electrolytic cell. In the life cycle of anode carbon block, with anode were gradually consumed, anode mechanism driven carbon anode piece of the fall to ensure the electrolyzer stable configurations. When used for a certain period of time, the carbon block has become very thin (about L3 ~ 18cm), in order to prevent the molten electrolyte for the anode steel claw must replace the new anode carbon block group. These residual carbon blocks are called as residues. High calorific value, dry without water, 1 tons equivalent to 1.5 tons of metallurgical coke. Maximal residual anode carbon block is generally in the range of 15% to 25%.
Residual very for a long time and electrolyte contact containing higher electrolyte components, such as aluminum, sodium, potassium, calcium, magnesium, lithium, fluorine composition, appearance is often accompanied by electrolyte formed by crust. Residue after cleaning can be used in the production process of anode materials. From the electrolytic tank to replace the residual polar group, to remove residual surface electrolyte shell, and then use the residual anode pressure disengaging machine or manual remnant pole and the guide rod is separated. With a hammer or press off and make the steel claw separating ring on iron claw. Residual anode on the residual electrolyte should be carefully cleaned, carbon product conductivity and oxidation activity of these electrolytes because, due to the gas permeation and gasification, the volume density of the residual anode decreased. After crushing and screening, the residues are divided into different sizes, which are used as a kind of aggregate to be added when the anode carbon block or anode paste is produced. Residues can also be used as fuel for smelting.
Physical and chemical index
Test item
Detection index
Test item
Detection index
C
More than 98%
Ash
Less than or equal to 5%
Total S
Less than or equal to 1.5%
Volatile parts
Less than or equal to 2.3%
Water
Less than or equal to 1%
Quantity of heat
8000 calories
Anode block application
Generally speaking, the tank after stripping and cleaning the anode mud, can be melted and cast anode. Some lower pole can also be used for other purposes, for example, copper sunset very as cold material added to the converter, can also be used as a raw material for manufacture of copper sulfate; nickel residual anode can be used for manufacturing of nickel ions in the electrolyte.
Brief introduction of iron powder
Iron powder according to particle size, habit is divided into coarse powder, medium powder, fine powder, fine powder and ultra-fine powder five grades. Particle size of 150 to 500 mu m range of particles composed of coarse powder, particle size of 44 to 150 m for the medium powder, 10 to 44 m for fine powder, 0.5 ~ 10 m for the very fine powder, less than 0.5 m for the ultra-fine powder. General will be able to through a 325 goal quasi sieve particle size of less than 44 m powder known as Subsieve powder, if more high precision screen specific provisions can only be used air classification equipment, but for a number of easy oxidation of the iron it can only be used JZDF nitrogen protection classifier to do.
Reduced iron powder, gray or black powder, also known as double suction agent, can absorb moisture and oxygen in the air, commonly used in food preservation. Reduced iron powder generally consisted of Fe3O4 under high temperature conditions in the flow of hydrogen or carbon monoxide gas reduction and generation, the main ingredient for the loose structure of elemental iron.
Atomized iron powder with high compressibility, high green strength, single pressure can obtain density in pressure slab 6.80g/cm3 above, especially to the pressing and sintering with high strength parts. The scope of atomized iron powder: density in the sintering deposit of more than 6.80g/cm3 is parts, powder metallurgy forging parts.
Iron powder characteristics:
I plant iron, iron, HW, iron ore, atomized iron, spraying iron main characteristics of products is round rate is high, than major, the surface is smooth, particle high compressibility, good hardness, with impact force resistance, compression is good, in the spray thrown sand operations using life is long, the blasting effect is excellent, and dust, with environmental protection operations and reduce the damage to human body has the advantages of is blasting operations of high-end electronic products preferred.
Iron powder application
Shot blasting forming on the surface of the product special matte effect; sandblasting surface spraying burr, clean, surface strengthening, sand light, derusting and various profiles of the surface cleaning and coating, electroplating of roughness (NAP) pretreatment; also can be used as additive of heavy concrete and blast furnace refractory material to increase the wear resistance, resistance to high temperature, anti erosion and oil filtering tank, product weight
tc..
Summary
Spinel is a rare mineral in nature, and it must be made by artificial synthesis. According to a certain proportion of raw materials, mixing pressing ball molding (to join the right amount of pulp). The characteristics of electric furnace melting temperature, in the smelting process, to maintain the redox state, avoid Fe2O3 FeO oxidation, to prevent the emergence of elemental Fe, after natural cooling of the hercynite sand. The uniform large crystal (95%) with no grain boundary was revealed under the microscope, which was similar to that of the glassy state. After processing into the iron aluminum spinel brick, mainly used in large-scale cement rotary kiln, instead of the current cement kiln used chrome brick, no Cr6+ pollution. Extended lining service life (magnesia chrome brick 10-12 months and hercynite brick 17-18 months), greatly reducing the consumption of refractory material and manpower, reduces the production cost, the full realization of the cement kiln chrome free production, solve the chromium pollution. Fe Al spinel represents a new generation of high performance chrome free refractories for cement rotary kiln.
The two main methods for the synthesis of spinel are sintering and electric melting. Most spinel material is made from high purity synthetic alumina and chemical grade magnesium oxide, namely in shaft kiln sintering and fused in arc furnace.
Al Mg spinel is a kind of aluminum magnesium oxide, its main component is alumina and Magnesium Oxide. Al Mg spinel has two kinds of natural formation and artificial synthesis. Natural magnesia spinel rarely found industrial applications of magnesium aluminum spinel are all artificial synthesis, the two main methods of synthetic magnesia alumina spinel is sintering and electric melting method. etc.
Spinel application
Sintered magnesia alumina spinel is used for cement rotary kiln, which not only avoids chromium pollution, but also has good resistance to spalling. Sintered magnesia alumina spinel is used for making ladle pouring material, which can greatly improve the anti erosion ability of steel sheet lining. The preparation of high quality synthetic spinel provides a new raw material for the production of amorphous and amorphous high purity refractory materials.
Electric melting magnesium aluminum spinel is manufacturing plate, nozzle brick, open hearth brick material. The high temperature mechanical properties of aluminum and magnesium spinel products are good, which are the basic raw materials of the filter belt, refractory casting material and high. Fused magnesia alumina spinel used in iron and steel smelting and glass industry furnace.
Barium sulfate
The mineral is barite barium sulfate. White amorphous powder. Difficult to dissolve in water, acid, alkali or organic solvent. The use of barium sulfate as the main use of barium sulfate in the gastrointestinal tract can absorb X rays and the development of the role, so mainly used as gastrointestinal contrast agent. Used for making barium salts, etc..
By barium sulfate solution with the addition of after removal of calcium and magnesium of Glauber's salt mixed solution, at 80 deg.c reactions were carried out precipitate. After filtration, washing and pickling, adjusting the pH value 5 ~ 6, filtering, drying and crushing. Also available barium yellow brine and mirabilite solution was prepared.
Application of barium sulfate
Barium sulfate can be used as a paint, ink, plastic, ad paints, cosmetics, battery raw material or filler, rubber products can be used as the filler and reinforcing effect, poly ethylene chloride resin as a filler and weighting agent, printed like paper, copperplate paper surface coating agents, textile sizing agent. Glass products used as a clarifying agent, can play a role in the role of the bubble and increase the luster. Protective wall material capable of being used as radiation protection ray. Also used in ceramics, enamel, spices and pigments and other industries. Manufacturing is also of other barium salts of raw materials -- powder coating, paint, ship paint, ordnance equipment paint, automobile paint, latex paint, interior and exterior architectural coatings, improve product light resistance, weather resistance, chemical and electrochemical corrosion products and decorative effect, coating enhanced the impact strength. The inorganic industry is used as the raw material for the manufacture of other barium salts, such as barium hydroxide, barium carbonate and barium chloride. For primer paint printing and modulation wood industry production of wood printing plate. As a green pigment and filler Lake production in organic synthesis.
Printing - ink filler, can play the aging resistance, resistance to exposure, increase adhesion, color clear, bright, non fading effect.
Filler, tire rubber, insulation rubber, rubber plate, adhesive tape, engineering plastics can enhance the product anti-aging performance and climate resistance, the product is not easy to aging embrittlement, and can significantly improve the surface finish, reduce production cost, as the main filler for powder coating is the primary means of regulating the powder bulk density increased rate of the powder.
Use of sodium sulfate
Sodium sulfate to sodium sulfide production, pulp and paper, glass, water glass, enamel, also used as a laxative and barium salt poisoning antidote. Is a by-product of the production of hydrochloric acid with salt and sulfuric acid. The chemical industry for the manufacture of sodium sulfide, sodium silicate, etc.. Laboratory for the wash out of the barium salt. Industrial used as a raw material for the production of NaOH and SO H, also used in paper, glass, printing and dyeing, synthetic fiber, leather, etc.. In the organic synthesis laboratory sodium sulfate is one of the most commonly used after treatment desiccant.
The use of sodium sulfate
1, the chemical industry used in the manufacture of sodium sulfide, sodium sulfide, sodium silicate (sodium silicate) and other chemical products. Production of sulfur base: the production of 1 tons of sulfur base needs about 1.6 tons of anhydrous sodium sulfate.
2, synthetic detergent: washing synthetic detergent industry. The amount of detergent is generally accounted for about 45% of the total amount of the entire industry accounted for about 45% of total amount of domestic mirabilite.
3, pulp and paper industry for the production of kraft pulp cooking agent.
4, glass: glass industry to substitute for soda, do help solvent. The amount of sodium sulfate in glass industry accounted for the total amount of 12%.
5, textile printing and dyeing textile industry for the deployment of Vigny Lun spinning coagulant.
6, for non-ferrous metals metallurgy, leather and other aspects.
7, special Glauber's salt includes sodium sulfate used in feed, medicine and other fields, and used in the detergent industry in coarse particles, color particles, such as new varieties.
The effect of different grades of sodium sulfate:
Sodium sulfate content among them, aliquots of impurities and color for different grades according to the, now the related knowledge introduction is as follows, to initiate it.
Electronic grade (mainly containing >99.99): mainly used in medicine as an antidiarrheal agent, the amount of small, there is no domestic production, mainly concentrated in Japan.
A class of one grade products (>99.0): mainly used for printing and dyeing, synthetic detergent, Vigny, etc..
Two kinds of first grade products (>98.0): mainly used in glass, dye, paper and other industries.
Three classes of grade one (the main >95.0): mainly used for inorganic salts and other industrial raw materials or other products such as filler.
Physical and chemical index
Physical property
Sodium bicarbonate was white crystal, fine crystalline monoclinic or opaque. Specific gravity 2.15. Odorless, salty, water soluble sodium bicarbonate, slightly soluble in ethanol. 25 water soluble in 10 water, about 18 degrees in 12 water soluble in water. Its aqueous solution by hydrolysis was slightly alkaline, at room temperature in the stable properties, heat easily decomposed, in more than 50 DEG C gradually decomposition, complete carbon dioxide loss at 270 DEG C, in air drying had no change, in the humid air in slow decomposition.
Chemical property
The heat is easy to decompose, and slowly decompose in the humid air. About the beginning of the reaction of CO at 50 degrees, 100 degrees in all into sodium carbonate. Rapid decomposition of the weak acid, its aqueous solution at 20 C, the decomposition of carbon dioxide and sodium carbonate, to the boiling point of all decomposition. Without stirring the solution made of the cold and to phenolphthalein test were only slightly alkaline reaction, placed or elevated temperature, the alkalinity increased. Fresh water solution pH 25 C 0.1mol/L value of 8.3. Low toxicity, half lethal dose (rat, oral) 4420mg/kg.
Soda application
Sodium bicarbonate can be directly used as pharmaceutical industry raw materials, used to treat hyperacidity. Can also be used for film production, tanning, mineral processing, smelting, heat treatment of metals, as well as for the fiber and rubber industry, etc.. At the same time as wool detergent, as well as for agricultural seed etc.. One of the most widely used osteoporosis agent in food industry for the production of biscuits, cakes, bread, bread and other is carbon dioxide in soda water generating agent; and alum composite alkaline baking soda, and soda ash composite for civilian soda; can also be used as butter preservation agent. Fire fighting equipment used in the production of acid and alkali fire extinguishers and foam. With the alum, H foaming agent in combination with uniform hole effect for rubber, sponge rubber industry production. Metallurgical industry used as a flux casting steel ingot. Machinery industry (Foundry) used as casting molding auxiliary mould. Printing and dyeing industry as dyeing and printing process, acid-base buffer, rear fabric dyeing and finishing the treatment agent. Baking soda stain can prevent yarn unevenness. Pharmaceutical industry used as raw material for making acid.
Graphite introduction
Graphite is an allotrope of carbon element, each carbon atom of the neighboring link also three carbon atoms (arrangement is multiple hexagon honeycomb) by covalent bonds with the covalent molecule is formed. Because each carbon atom emits an electron, the electrons are free to move, so the graphite is a conductor. Graphite is one of the most soft minerals, and its use includes the manufacture of pencil cores and lubricants.
Graphite application
1, as a refractory material: graphite and its products have properties of high - strength, high temperature resistance, mainly used to produce graphite crucible in the metallurgical industry, in steelmaking in graphite is usually used for the protection of steel ingot agent, metallurgical furnace lining.
2, as the conductive material: used for manufacturing electrode, carbon brush, carbon rod, carbon nanotubes, mercury is the cathode in electrical industry, graphite gaskets, telephone parts, TV picture tube coating.
3, as wear-resistant lubricating material: Graphite in the mechanical industry as a lubricant. Lubricating oils are often not used in high speed, high temperature and high pressure conditions, and graphite wear resistant materials can be used at high sliding speed in 200~2000. Many of the devices that transport corrosive media are widely used in the piston cup, seal rings and bearings, which are widely used in graphite materials. Graphite is many metal processing (drawing, drawing) the good lubricant.
4, graphite has good chemical stability. After special processing of graphite, with corrosion resistance, good thermal conductivity, low permeability characteristics, which is widely used in the manufacturing of heat exchanger, reaction tank, condenser, the burning tower, absorption tower, a cooler, a heater, a filter, a pump device. Widely used in petrochemical, wet metallurgy, acid and alkali production, synthetic fiber, paper and other industrial sectors, can save a lot of metal materials.
The corrosion resistance of the different types of non transparent graphite is different because of the different resin. Such as phenolic resin impregnated are acid, but not alkali resistant; furfuryl alcohol resin impregnated both acid and alkali. Heat tolerance of different varieties also have differences: carbon and graphite in a reducing atmosphere can be resistant to 2000 to 3000 DEG C, in an oxidizing atmosphere respectively in 350 and 400 degrees Celsius oxidation; impermeable graphite varieties with impregnating vary, generally by the heat-resistant phenolic or furfuryl alcohol immersed in 180 DEG C below.
Kaolin application
1, kaolin industrial use
Kaolin has become a paper, ceramics, rubber, chemicals, coatings, medicine and national defense, and dozens of other industries essential mineral raw materials.
Ceramic industry is the first application of kaolin, a large amount of industry. The general dosage is 30% ~ 20% of the formula. Kaolin in ceramic effect is the introduction of Al2O3, is conducive to the formation of mullite, to improve its chemical stability and strength of sinter, in firing kaolin soil derived from the decomposition of mullite, forming the main frame of the strength of the green compacts, can prevent the products from deformation, firing in a wider temperature range, also can make the green body with certain whiteness. At the same time, kaolin has certain plasticity, adhesive, suspension and ability to bind endowed with porcelain clay, glaze good formability, make ceramic mud blank to billet car and grouting, easy to shape. If used in the wire, can increase the insulation, reduce the dielectric loss. Ceramic not only on kaolin clay plasticity, binding, drying shrinkage, dry strength, sintering shrinkage, sintering properties, refractoriness and burn whiteness have strict requirements, but also relates to the chemical properties, especially the presence of color elements caused by iron, titanium, copper, chromium, manganese and other, to burn after the brightness decreases, produce spots. Of kaolin particle size is smaller, the better, the porcelain clay has good plasticity and dry strength, but the rapid casting, accelerate the grouting speed and the dehydration rate of the casting process, the need to improve the batching particle size. In addition, kaolinite crystallization degree of difference, will also significantly affect the process performance of the porcelain, crystallization degree, plasticity, binding capacity is low, drying shrinkage of small, high sintering temperature, the impurity content also reduced; on the contrary, the plasticity is high, dry shrinkage of large, low sintering temperature, corresponding impurity content is also high.
2, kaolin in the field of cosmetics applications
Kaolin is also known as the white porcelain, is a kind of clay mineral, usually white. In beauty, kaolin is usually used on the mask, it can absorb the oil and waste of the skin, clean the skin to remove dirt, and the town of Jingan to ask the fragile skin. The loss of water and nutrients from the mineral supplement in natural mud, balance oil secretion, make the skin more smooth, more flexible.
Efficiency of granulated blast furnace slag powder
1 to save the amount of cement 30-60% (including cement mortar), reduce the cost of cement and concrete projects.
2 with the role of volcanic ash, increase concrete compressive, tensile, bending, shear strength.
3. Significantly reduced the hydration heat of concrete, improve the concrete workability, reduce segregation and bleeding, reduce the large volume concrete temperature changes and stress, inhibition of temperature and cracks.
4 can inhibit the alkali aggregate reaction, significantly improve the ability of concrete anti alkali aggregate reaction.
5 can be in the form of micro aggregates in the concrete, improve the concrete in the hole structure, so that the pore size can be refined and uniform, improve the permeability of concrete, freeze-thaw resistance and durability.
6 can significantly reduce the bleeding amount of cement concrete, improve cement concrete workability.
7 can effectively improve the cement concrete resistance to seawater and fresh water erosion, resistance to sulfate erosion. Especially suitable for anti seawater engineering, underground engineering and pavement engineering.
8 with the same amount of water, the plastic concrete can be formulated to avoid the quality problems caused by the reinforcement of the reinforced concrete and the poor vibration. Under the same conditions, the concrete can be made into the flow pattern of the mold, reduce the concrete pump, pipe and mold wear and prolong the service life of the concrete pump.
9 can be made of masonry, plastering cement mortar and low grade cement. In the case of meeting the strength requirements, not only can save the cement of 30-60%, but also improve the operability of the construction.
10 suitable for the production of environmentally compatible type of cement based materials and high performance concrete admixture.
Method for the use of phosphate rock powder
Suitable for rock phosphate fertilizer in acid soil, is not suitable for dressing. As the fertilizer application amount of phosphate powder should be considered depending on the available phosphorus content, generally about 100 pounds per acre. According to the uniform land tillage applicator, then turn into the root depth. The phosphate rock long effective period, after the implementation of separate 1-2 zaishi. Phosphate rock powder should be arranged in acid and phosphorus deficiency.
Mica powder
Mica powder is a non-metallic mineral, containing a variety of ingredients, including the main SiO2, the content is generally around 49%, Al2O3 content of about 30%. Mica powder has good elasticity and toughness. Insulation, high temperature resistance, acid and alkali resistance, corrosion resistance, strong adhesion and other characteristics, is an excellent additive. It is widely used in electrical appliances, welding, rubber, plastics, paper, paint, paint, paint, ceramics, cosmetics, new building materials and other industries, the use of a very wide range. With the development of science and technology, people have opened up a new field of application.
Mica powder application
1. coating are
Mica powder coating is a kind of new green environmental protection packing, unique two-dimensional sheet barrier, UV shielding, chemical structure stability effectively improve the coating's penetration resistance, weatherability, abrasion resistance and corrosion resistance. Also, excluding any radioactive elements, leading the trend of environmental protection in coating field. It is widely used in building exterior wall coatings, anti-corrosion coatings, powder coatings, high temperature resistant coatings, insulation coatings, waterproof coating, paint, paint, paint and some special coating.
2 cosmetics field
Makeup grade mica has unique sheet structure, silky luster and silky texture, the silty cosmetics like silky light and delicate. Natural texture let skin has excellent affinity and crystal beautiful effect, giving cosmetic touch soft, soft luster, good appetency, paste skin force is strong wait for a characteristic, is the cosmetics industry preferred high-grade powder materials.
3 plastics field
The plastic mica powder has the characteristics of high thickness ratio, high temperature resistance, acid and alkali resistance, abrasion resistance, etc., and is a kind of natural functional powder filling material. Company select high-quality mica ore, the unique wet grinding and peeling and purification technique, mica lamellae cleavage completely, save the mica unique high diameter thickness ratio structure (diameter to thickness ratio is as high as more than 100), make it in plastic products with prominent enhancement effect, and gives plastic plastic products excellent dimensional stability; the product itself characteristic of high temperature also greatly improve hot plastic deformation thermometer Vicat softening point, applicable to high temperature condition of parts and products, mica and glass fiber compared with smooth product surface, no warping deformation characteristics. Products are widely used in PP, PA, PBT, PET and other plastic modification, plastic masterbatch, engineering application.
Summary
Quartz sand is a hard, wear-resisting, stable chemical property of silicate minerals, the main mineral composition is SiO2, quartz sand color is milky white, or colorless translucent, a multi edge type ball of white crystal, hardness, brittle cleavage, conchoidal fracture, oily luster, density is 2.65, bulk density (1-20 1.6), 20-200 head is 1.5, the chemical, thermal and mechanical properties has obvious differences to, insoluble in acid, slightly soluble in KOH solution, melting point 1750 DEG C.
Quartz sand application
Quartz sand is a unique physical and chemical properties, making it occupies a pivotal position in the aviation, aerospace, electronics, machinery, and today, with the rapid development of IT industry, especially in the inner molecular chain structure, crystal shape and lattice changes, so that it has high temperature resistance, thermal expansion coefficient is small, high insulation, corrosion resistance, piezo electric effect, resonance effect and the unique optical properties, is playing a more and more important role in many high-tech products.
Fine quartz sand can be used as abrasive, such as grinding glass:
Glass: flat glass, float glass, glass (glass jar, glass bottle, glass tube, etc.), optical glass, glass fiber, glass instrument, conductive glass, glass cloth and anti ray special glass as the main raw material.
Second, ceramics and refractory materials: embryo material and porcelain glaze, kiln with high silica brick, ordinary brick and silicon carbide and other raw materials.
Three, metallurgy: silicon metal, ferrosilicon alloy and silicon Aluminum Alloy and other raw materials or additives, flux
Four, construction: concrete, cementitious materials, road materials, artificial marble, cement physical performance test materials (cement standard sand)
Five, chemical: silicon compounds and water glass and other raw materials, sulfuric acid tower filler, amorphous silica powder
Refractory quartz sand application
Refractory quartz sand is the main component of quartz sand. According to various needs to add different additives. Scientific formula. Advantages of low price, good acid resistance, non stick slag. All required materials for metal smelting induction furnace lining.
The main technical indicators: SiO2 = 97.5%Al2O30.7---0.3%Fe2O30.4---0.1%H2O = 0.5%
Bulk density: 1.9----2.1g/cm fand
Liner volume density: 1.75---1.8g/ cm fand
Fire resistance: A[1500---1700 advisable]
Fire resistance: H, C[1300---1450] advisable size: 5.1-----0.021mm
Refractory quartz sand used in smelting non-ferrous metal, black power, frequency, frequency conversion, core induction furnace lining
Water sand characteristics
(1) cutting speed
(2) cutting surface more smooth, more direct
(3) no large particles of sand pipe (nozzle)
(4) fine grained garnet without void
(5) there is no dust, the dust affects the cutting effect and it is difficult to clean the waste after cutting.
Commonly used specifications
46# 60# 80#100# 120# 160# 24#
Use sand jet
60# products: stone cutting, part of ceramic tile, carbon steel cutting
80# products: ceramic tiles, carbon steel, aluminum, stainless steel, copper, titanium alloy and other cutting; part of the stone cutting; part of glass cutting, part of silicon, polycrystalline silicon cutting
80# products: glass cutting, silicon, polycrystalline silicon cutting; some ceramic tile, carbon steel, aluminum, stainless steel, copper, titanium alloy and other cutting
120# products: glass cutting, single crystal silicon, polycrystalline silicon cutting
Counterweight iron sand.
The counterweight iron is a kind of iron ore raw materials in weight, its role is to balance. For example, the counterweight engineering machinery in sporting goods in weight.
For weight or pressure reuse of iron ore, iron ore, the proportion of general counterweight iron for 4.2 - 7.2 (bulk density of 2.5 - 4.8) between, customers are in terms of the drainage density (true specific gravity drainage density [1]). The product weight different needs of different proportion of the iron weight.
Counterweight iron sand density
The proportion of general counterweight iron for 4.2 - 7.2 (bulk density of 2.5 - 4.8) between, specifications: 0.2-2.0mm, customers often to drainage density (specific gravity), as the purchase of indicators. The product weight different needs of different proportion of the iron weight.
A small proportion of iron weight: 6.2-6.5 tons / m3 4.1-4.3 tons / m3 reactor
A large proportion of iron weight: 6.8-7.2 tons / m3 4.8-5.2 tons / m3 reactor
Physical and chemical index
Chemical composition
Content
Iron (fe)
More than 93%
Carbon (c)
Less than or equal to 0.50%
Manganese (mn)
Less than or equal to 1.20%
Silicon (si)
Less than or equal to 0.20%
Sulfur (s)
Less than or equal to 0.25%
Phosphorus (p)
Less than or equal to 0.05%
Counterweight iron sand use
1, sports and fitness activities counterweight
2, electric counterweight counterweight
3, concrete weight
4, the hull large mechanical engineering mechanical pressure
5, wear-resistant engineering, such as the airport runway, bridge pavement, pier, bridge, steel plant, etc..
Pearly sand
Perlite is a by acidic volcanic glassy lava through the broken, preheating, roasting and swelling and are made with porous structure, white, loose granular materials, which has the characteristics of small volume, low thermal conductivity, good chemical stability, non flammable, non-toxic, tasteless, sound-absorbing.
Pearly sand properties
1. Perlite is a adsorption ability is very strong material, it has good infiltration, infiltration of the pearlite sand surface is wet after the release of heat.
2 pearl sand is a small capacity, low thermal conductivity, good chemical stability of the material.
3 perlite or not flammable, non-toxic and tasteless, sound-absorbing material, has good effect in the industry.
Physical and chemical index
Component
Sio2
Al2o3
Fe2o3
Cao
Mgo
K2o
Na2o
Content
Seventy-five point four two
Fourteen point two six
One point zero one
One point seven two
Zero point three seven
Four point zero one
Three point two six
Pearly sand classification
One is the use of perlite building, the particles are relatively large, the intensity is relatively large. The other is the use of equipment insulation, mainly used to make filler, smaller particles, small strength, good thermal insulation.
Use of perlite
This product is mainly used for large ultra low temperature thermal engineering construction of the insulating layer, such as oxygen air separation unit, natural gas, liquid hydrogen, liquid nitrogen, liquid oxygen refrigerated transport such as travel. This product has good ultra low temperature thermal insulation performance.
The 1 is the perlite insulation materials, can be used to make some use of the roof insulation layer. Heat insulation effect is good, and some can also be used to make the use of crop cultivation soil configuration.
2 production of heat insulation brick used in the construction industry, etc..
3 making hand washing powder, washing powder of pearlite is other material cannot replace, structure and its screening is very strict.
Classification of steel fiber
The advent of steel fiber is not long, but more and more widely used in the field, with this corresponding, steel fiber varieties are also increasing.
According to the shape of the division:
Flat steel fiber, pressure prismatic steel fiber, waveform steel fiber, bending hook shaped steel fiber, big head shaped steel fiber, double pointed steel fiber, cluster of steel fiber and so on.
2 according to the section shape:
Round, rectangular, groove type, irregular
3 according to the production process:
Cut off the steel fiber (cut off with a fine steel wire);
Shear steel fiber (with a thin steel sheet, strip shear);
Milling steel fiber (steel or steel ingot cutting);
Molten steel fiber (molten steel pumping). The most promising is the dissolution of steel fiber, the lowest price
4 according to the material is divided into:
Plain carbon fiber (tensile strength is generally in 300~2500mpa);
Stainless steel fiber (according to the material 304310330430446, etc.);
Other metal fibers (aluminum, copper, titanium and alloy).
According to the state of surface coating:
No coating, surface coating of epoxy resin, zinc, etc.. The industrial use of a large number of ordinary steel fiber without coating.
Resin coated sand
Coated sand, sand surface in the shape of the front is covered with a layer of solid resin sand or sand core. Cold and hot two lamination process: cooling method using ethanol to dissolve the resin and in mixed sand adding Urotropine, second is coated on the surface of the sand, the ethanol volatilization, coated sand; thermal method to sand preheated to a certain temperature, and resin to melt, mixing the resin is coated on the surface of the sand, and Urotropine solution and lubricant. etc.
Characteristics of coated sand
1, vibration cleaning, high strength, low gas, low expansion;
2, and good casting surface finish;
3, shell type is not up, good thermal stability, good thermal conductivity, good mobility, surface roughness of castings;
4, high strength, high temperature resistance, low expansion, good release properties, good resistance to sand;
5, uniform shell noshelling, curing speed;
Coated sand material
Resin coated sand used mainly high-quality selection of natural quartz sand as raw sand, thermoplastic phenolic resin, urotropine and enhanced agent as raw materials. According to different technical requirements of the user, in the curing speed, de film, liquidity and scatters, casting surface finish, storage and other aspects of the adjusted ratio. Is a car, tractor, hydraulic parts, such as one of the best modeling materials.
Type of coated sand
(1) ordinary type of coated sand
Composed of quartz sand, novolak resin, urotropine and calcium stearate, without the additives. Applicable to the production of general cast iron parts.
(2) high strength and low gas coated sand
Is the ordinary of precoated sand replacement products, by the addition of additives and the new process is prepared, its strength more than 30% higher than in ordinary coated sand, volume is greatly reduced, and the suitable for production of complex precision cast iron.
(3) high temperature coated sand
At high temperatures has characteristics of high strength, heat resistance for a long time, applicable to the production of automotive engine cylinder block, cylinder head, container angle complex thin wall castings.
(4) class easy collapsibility of coated sand
Has better strength and excellent low temperature collapsibility, suitable for the production of non-ferrous metal castings.
(5) other special requirements for coated sand
In order to meet the needs of different products, developed a series of precoated sand such as centrifugal casting precoated sand, chilled precoated sand, wet state of precoated sand, anti sticking sand, anti veining, orange peel coated sand prevention etc..
Ceramic application
1, aluminum vanadium soil ceramic sand (oil support agent ceramic sand), mainly used for oil support agent, is currently the largest demand of ceramic sand varieties, also called oil fracturing support agent ceramic sand. Good effect on increasing oil and gas production.
2, clay ceramsite, with clay and sub clay as main raw material, processed granulation, sintering and expanding into, particle diameter of more than 5 mm light coarse aggregate, said clay ceramsite.
3, shale shale, also known as the expansion of shale. In clayey shale, slate, etc by crushing, screening, grinding or after into a ball, burning expansion and particle diameter in 5 mm above the light rough set for shale ceramsite material.
4, waste ceramic, as the city continues to develop and grow, more and more urban garbage, urban waste disposal, become an increasingly prominent problem.
5, coal gangue haydite is discharged during the process of coal containing a small amount of carbon black waste rock, is the largest emissions of solid waste in our country, the emission and deposition not only occupy a lot of farmland, also on the surface, the atmosphere caused great pollution, the product is innovative, advanced, environmentally friendly products.
6, biological sludge ceramisite, with biological sludge as main raw materials by drying, grinding, ball, sintered ceramsite, known as biological sludge ceramsite. The use of biological sludge to replace part of the clay to burn the clay, but also to protect the farmland, but also played a certain role in environmental protection.
7, river sediment ceramisite, using river mud instead of clay, the dredging, natural drying, raw material into ball, preheating, roasting, cooling made of ceramsite is called the river sediment ceramisite. The bottom mud ceramic manufacturing, not only will reduce building materials manufacturing and agricultural land dispute soil, but also for the mud at the bottom of the river to find a reasonable way, solve the problem of secondary pollution of river sediment, to achieve the purpose of waste of resources.
8, fly ash haydite, with solid waste as the main raw material, adding a certain amount of binder and water, processed into a ball, sintering expansion or natural curing and, particle diameter of more than 5 mm light coarse aggregate, referred to as fly ash ceramsite.
Silicon carbide applications
1, abrasive and abrasive:
Mainly for the production of grinding wheel, abrasive paper, abrasive, abrasive, grinding, grinding head, grinding paste and photovoltaic products monocrystalline silicon, polycrystalline silicon and electronic industry of piezoelectric crystal aspects such as grinding, polishing etc..
2, chemical industry:
Can be used to make steel and cast iron oxygen agent, can be used as the raw material for the manufacture of four silicon tetrachloride, is the main raw material of the silicon resin industry. SiC deoxidation agent is a new type of strong composite deoxidizing agent, to replace the traditional silicon powder toner for deoxidation, and the original process compared to the physical and chemical performance is more stable, good deoxidizing effect, deoxidizing time relationship, energy conservation, improve the efficiency of steel, improve steel quality, low raw material consumption, reduce environmental pollution, improve working conditions, and the comprehensive economic benefits of improving furnace has an important value.
3, non-ferrous metals:00
Using silicon carbide with high temperature resistance, strength, good thermal conductivity, impact, high temperature indirect heating material, such as firm retort furnace, furnace distillation tray, aluminum electrolytic tank, copper smelting furnace lining, zinc powder furnace with arc plate, thermocouple protection tube.
4, iron and steel:
The use of silicon carbide corrosion resistance, thermal shock resistance and wear resistance, good thermal conductivity characteristics, used to improve the service life of large blast furnace lining.
5, building materials ceramic grinding wheel industry:
Using the thermal conductivity and thermal radiation, high heat intensity of characteristic, manufacturing sheet kiln furniture, can not only reduce the kiln capacity, but also increase the kiln loading capacity and the quality of the products and shorten the production cycle and is ideal for sintering ceramic glaze baking indirect materials.
Summary
Bauxite also known as alumina and bauxite, main component is aluminum oxide, hydrated alumina containing impurities, is a kind of earthy mineral. White or gray white, yellow or pale red as a result of iron. Density 3.9 ~ 4g/cm3, hardness 1 ~ 3, opaque, brittle, very difficult to melt. Insoluble in water, soluble in sulfuric acid, sodium hydroxide solution, mainly used in aluminum smelting, refractory materials.
Referred to in the refractory industry bauxite is usually refers to the calcined Al2O3>=48%, and contain low Fe2O3 of bauxite, alumina clinker is after Calcined Bauxite Mine. Clinker is pale yellow and dark grey, it is mainly used for high alumina refractory materials, can also be used to make fused corundum.
Classification of bauxite
Calcined Bauxite by different calcining kiln is divided into:
The shaft of bauxite;
The converter bauxite;
Round kiln bauxite.
Use of bauxite
1, refining - aluminum industrial alumina used in national defense, aviation, automobile, electrical appliances, chemical industry, daily necessities, etc..
2, precision casting, bauxite is processed into fine powder and made into mold casting, used in military, aerospace, communications, instrumentation, machinery and medical equipment department.
3, used for refractory products -- high alumina bauxite refractory high degree of up to 1780 DEG C, strong chemical stability, good physical properties.
4, aluminum silicate refractory fiber - bauxite has light weight, high temperature resistance, good thermal stability, low thermal conductivity, heat capacity of small and resistance to mechanical vibration and other advantages. Bauxite for iron and steel, nonferrous metallurgy, electronics, petroleum, chemical, aerospace, atomic energy, defense and other industries. It is to high Al clinker put into the melt temperature is about 20 to 22 DEG C high temperature electric arc furnace, the melting in high temperature, high pressure high speed air or steam spray blowing and cooling, the white cotton, aluminium silicate refractory fibers. Bauxite can be pressed into refractory fiber blanket, plate or woven cloth instead of smelting, chemical, glass and other industrial furnace lining. Firefighters can make clothes with refractory fiber cloth.
5, alumina magnesia and bauxite as raw material, add appropriate binder, bauxite for pouring ladle lining the whole barrel effect is very good.
6, to produce alumina cement, abrasive materials, ceramic industry and chemical industry can be a variety of aluminum compounds.
Drift beads use
1, refractory insulation materials;Such as light sintered brick, light unburned brick, casting insulation riser, pipe insulation shell heat preservation and heat insulation, fire insulation paint, paste, composite insulation dry powder, light resistant glass fiber reinforced plastic.
2, construction materials;Building decoration, high-grade pavement materials, roof waterproof thermal insulation coating, road engineering, modified asphalt, etc.
3, the oil industry;, pipeline anticorrosion insulation, undersea oil field oil well cementing, floating device, the well drilling mud reducing agent, oil and gas pipelines, etc.
4, insulating materials;Plastic activation fillers, insulation of high temperature and high pressure, etc.
5, coatings industry;Stealth coating, paint, printing ink, adhesives, insulating paint, anti-corrosion paint, high temperature resistant, horizon, the external walls of fire retardant paint, coating, insulation coating, floor paint, auto putty, putty, etc.
6, space and space development;Satellite, rocket, the spacecraft surface composites, satellite fire protection layer, Marine equipment, vessels, deep-sea submarines.
7, the plastic industry;Such as car accessories, instrument panel, home appliance shell, fan, speakers, always bearing of lamps and lanterns, casting, gear, structure, zippers, pipes, plates, etc.
8, glass fiber reinforced plastic products: all kinds of glass fiber reinforced plastic products, artificial marble, glass fiber reinforced plastic ship, arts and crafts, etc.
Potting compound 9, encapsulation materials: transformer, electronic packaging materials.
Production requirement of high alumina cement
1, fineness: the finer the cement particles, the larger the surface area, the faster the more full hydration, early and late strength are higher. State regulations: the specific surface area should be more than 300 square meters / kg, otherwise not qualified.
2, setting time: in order to guarantee in the construction have plenty of time to finish the mixing, transportation, molding, and other various process, cement and its initial setting time shoulds not be too short; after the completion of construction, hope cement as soon as possible hardening and strength, therefore the end coagulation time shoulds not be too long. Portland cement at the beginning of the first set of time shall not be earlier than 45 minutes, the final setting time shall not be later than 390 minutes.
3, volume stability: cement paste in the coagulation process of volume change uniformity called the volume stability of cement. If the volume change is not uniform, that is, the volume stability is poor, prone to warping and cracking, reduce the quality of the project and even the accident.
4, refractory cement baking refractory cement lining baking, must pay attention to the following matters:
1) at room temperature 350 degrees, the most likely to cause local burst, to pay special attention to the slow baking. If there are still a lot of steam after the 350 degree heat, still should slow down the speed of heating.
2) in the condition of bad ventilation, water vapor is not easy to discharge, to properly extend the heat preservation time.
3) when using heavy oil for baking, to prevent oil sprayed on the surface of the furnace lining, to prevent local burst.
4) when using wood baking, direct contact with the flame is often caused by local heating too fast, should be protected.
5) to the new cast of refractory cement, at least through the 3D can be carried out after baking.
6) for refractory cement lining should also slow cooling, avoid forced ventilation.
High alumina cement application
High alumina cement and sulphoaluminate cement refractory cement, equivalent to the cement 625#. Because of its excellent fast setting, high strength, resistance to high temperature characteristics of that day intensity can reach 80% and refractoriness up to 1450 degrees, refractory concrete strength up to 55MPa, is one of the industrial furnace engineering excellent high temperature binder material.
Ceramic ball
Ceramic ball is a kind of ceramic packing material, which is made of high quality kaolin, feldspar material, aluminum oxide material and so on. Inert alumina ball is made of high-quality chemical raw materials processing and clay.
Ceramic ball classification
Alumina ceramic ball
Because of its high strength, high hardness, high wear resistance, large proportion, small volume, high temperature resistance, corrosion resistance, no pollution and other excellent properties, was widely using in the deep processing of thick and hard materials like different types of ceramic, enamel, glass, chemicals and other factories, is ball mill, pot shaped mill, vibrating mill and other fine grinding equipment, grinding body, its grinding grinding efficiency and wear resistance greatly superior to ordinary coccolith or natural pebbles.
(1) the main component of the product is high quality alumina, which has no effect on the quality of the grinding materials.
(2) the product by rolling and pressing, than the major, can greatly improve grinding efficiency and reduce the grinding time, save energy, reduce costs; and effectively increase the effective volume of the ball mill, thereby increasing the adding amount of grinding materials.
(3) the wearing of the product is low, and the service life of the grinding body can be prolonged.
(4) the product has a high degree of whiteness, which will not affect the color of the material being ground.
Two, zirconia ceramic ball
Three, silicon nitride ceramic ball
Four, silicon carbide ceramic ball
The modulus of elasticity is 50% larger than that of steel, and the coefficient of thermal expansion is less than 25% of steel, which can maintain high strength and hardness, corrosion resistance, no rust, no magnetism, and can work under the condition of no oil lubrication.
Introduction of casting material
The pouring material is also called the refractory casting material, which is made from the refractory material by adding a certain amount of binder. With high fluidity, the refractory material is suitable to be formed by casting method.
Compared with other unshaped refractory material, binder and higher moisture content, liquidity better, and therefore not stereotypes refractory material has wide application scope, under the conditions of use of the material and binder to be selected. Can be directly cast into the use of the lining, and can be used as a method of pouring or earthquake in the use of prefabricated blocks.
Classification of refractory casting materials
Refractory materials are divided into refractory materials and refractory materials. Unshaped refractory castable is composed of a variety of aggregate or aggregate and one or more viscous agent and mixed powder particles and must be used and a or a plurality of liquid with stirring evenly, with strong liquidity and plasticity.
Type of casting material
According to the porosity ratio, binder and aggregate variety. In practice, the use of temperature or functional features are often used to classify.
According to the porosity ratio: there are dense refractory pouring material and porosity rate of not less than 45% of the heat insulation refractory burning note two kinds of.
According to the bond points: there is a combination of water hardness, chemical binding, condensation combined with refractory pouring material.
Hard binding casting material at room temperature condensation hardening and through hydration and hardening, the main varieties of Portland cement, ordinary calcium aluminate cement, pure calcium aluminate cement, electric melting pure calcium aluminate cement casting material, etc.. Chemical combination of casting materials at room temperature generally through the addition of hardening agent to form a chemical reaction and hardening, the main varieties of water glass, aluminum sulfate, phosphate casting materials, etc.. In the process of sintering, the aggregate and the casting materials are hardened by sintering, the main varieties are clay casting materials, etc..
According to the refractory aggregate: clay aggregate (Al2O3 30% ~ 45%), high alumina (Al2O3%26ge; 45%) aggregate, siliceous aggregate (SiO2%26ge; 85%, Al2O3%26lt 10%) alkaline aggregate (magnesite and dolomite), a special aggregate carbon, carbides, spinel, zircon, nitride and insulation aggregate (perlite, vermiculite, ceramsite, cenosphere, light sand brick, porous chamotte, alumina hollow ball).
Construction of pouring material
Guangxi white mud
Guangxi Rowe white mud is a kind of soft kaolin, can also be called soft fire clay, 1992 by the China clay specialist liuchangling in Fusui County of Guangxi screening confirmed Rowe white mud is ball clay, so now there are dimension called Luo ball clay. Rowe white mud (ball clay) main chemical composition for the SiO2 content 45.3~51.6%, alumina (aluminum oxide) content 26~36.8%, ferric oxide (Fe2O3) 0.65~2.2%, K2O+Na2O
