Smelting of black fused alumina powder
The smelting method of black fused alumina is basically same with smelting of brown corundum. The production method of black fused alumina is choosing high-quality bauxite, iron oxide and other raw materials, add other trace elements, carefully smelting in dumping-type electric arc furnace , to ensure that the massive black fused alumina block are top grade, less impurities, ,stable quality. This laid solid foundation for producing period of black fused alumina sand , grain size black fused alumina sand and black fused alumina powder that are of moderate hardness, good toughness, good using performance and stability quality.
Prices of black fused alumina powder
In the abrasive products, brown fused alumina, white fused alumina, black fused alumina are same in using bauxite as main raw material, add iron scrap in high-temperature electric arc furnace smelting, and why the price of black fused alumina is lower than price of brown fused alumina and black fused alumina , The price of aluminum in the market than the price of iron per ton to be much higher, brown fused alumina sand content of more than 95%, while the black fused alumina a sand content of aluminum oxide To 85%, we can see the same level of fused alumina aluminum content is much higher than black fused alumina, and fused alumina products in the most valuable component is alumina, therefore, the price of black fused alumina is much lower than white fused alumina and brown corundum.
Brief introduction of brown fused alumina powder
Brown fused alumina uses bauxite, coke as the main raw material, smelting in the electric arc furnace at high temperature. The composition of brown corundum mainly include AL2O3, TiO2, also contains a small amount of SiO2 and Fe2O3, micro hardness is HV1800-2200. The toughness is lower than silicon carbide, higher than that of white corundum, hardness is 9.0, slightly lower than the same level of white fused alumina. Commonly used brown fused alumina can be divided into brown fused alumina powder, brown fused alumina segment of sand,brown fused alumina granular sand. Today, I mainly explain the brown fused alumina powder related knowledge for you.
Brown fused alumina powder specifications:
Commonly used brown fused alumina powder specifications: 325,400,600,800,1000. . . . (Head) Gongyi Qingyun Refractories Co., Ltd. can adjust production according to customer requirements?
brown fused alumina powder
brown fused alumina powder
Properties of brown Alumina powder
The brown fused alumina powder has moderate hardness, high toughness, good self-sharpening ability, low sand consumption and recyclable use, good abrasion and abrasion resistance, and chemical composition stability, abrasion resistance, acid and alkali resistance. Especially its high hardness, specific gravity large, chemical stability and its unique self-sharpening, etc., so used as the first choice in brown fused alumina abrasive sandblasting process , but also the best choice for cleaning up the work piece.
Abrasives made of brown fused alumina powder , suitable for processing a variety of general steel, malleable iron, hard bronze, etc., can also produce high-grade refractories. Brown fused alumina abrasive use high-quality brown fused alumina as raw materials, using modern new unique technology from refining.Brown fused alumina sandblasting has characteristics of short grinding time, high efficiency, good efficiency and low price. The abrasive shell-shaped fracture, sharp edges and corners, in the crushing classification in the formation of new edges and edges, so that the grinding ability is better than other abrasives.
Introduction of garnet
Garnet is a island structure of aluminum salt silicic acid (ca), also known as the "jade sand" or "natural" emery, wear resistance, high melting point, it is more than the big, stable performance, color beautiful, at present, the high purity magnetic created with grey, red, green, white wait for a variety of chromosome, is the new development of stereoscopic wall spray paint, color casing or BoKeChang only can do sandblasting abrasive resistance, due to its internal chemical molecules, chemistry stability is good, also is often used as filter medium water purification filter material.
Garnet purposes
Garnet with moderate hardness, good toughness, particle size uniform, it is a good natural abrasive.In the optical industry, electronic industry, machinery industry etc widely used.Such as:
1, steel structure, sandblasting derusting hull, Bridges and so on;
2, metal, stone, glass, water knife cutting;
3, chemical, petroleum, pharmaceutical, water treatment filter medium;
4, marble, optical lenses, glass, leather and other materials of grinding;
5, grinding wheel, oilstone, emery cloth and sand paper raw materials;
6, the highway pavement, airport runway, prevent slippery, wear-resisting rubber paint, such as wear-resistant materials;
7, is widely used in construction field, high-grade really stone paint exterior wall decoration interior decoration elegant temperament.The ideal new nonmetal wear-resisting flooring aggregate.
Brown fused alumina is called industrial teeth, in addition to the application in refractories, can also be used in sandblasting, free grinding, resin abrasive, filter media, hydraulic cutting and so on. Brown fused alumina sand put bauxite as raw material, obtained by high temperature smelting, its basic mineral is a-Al2O3, the hardness of brown fused alumina sand is high, high melting point, thermal conductivity, high temperature volume stability, not easy to crack, acid resistance,alkali resistance , suitable for casting core surface sand, paint and investment casting system shell material, and can be used as plain carbon steel, alloy steel, hard bronze, cast iron pieces of coarse grinding and free abrasive. The price of brown fused alumina is lower than that of same level white corundum, it has a better cost performance.
Brown fused alumina sand often is irregular prism reddish brown or brownish black particles, bulk density: 1.65g / cm, hardness 9.1. The composition of brown corundum are (%): Al2O3: 92-98.8%, SiO2: 1.3-%. Product specifications: 16 # 20 # 24 # 30 # 36 # 46 # 60 # 80 # 100 # 120 # 150 # 180 # 200 # 240 # 260 # 280 # 320 # 400 # 500 # 600 # 800 #. Packing: 25KG / woven belt. Qingyun corundum refractory companies can also produce according to customer requirements.
brown fused alumina sand
Brown fused alumina sand, brown fused alumina powder is with moderate hardness, high toughness, strong anti-crushing ability, high temperature resistance, oxidation resistance, corrosion resistance, low cost, strong applicability, high purity, good crystallization, strong liquidity, low linear expansion coefficient , Corrosion resistance and other characteristics. In the application process has not detonated, not powder, no cracking, widely used in abrasive abrasive, refractories, sandblasting, grinding and polishing, wear-resistant floor of silicon carbide, precision casting mold shell production. Brown fused alumina sand can be made of sandpaper, emery cloth, grinding wheel, grinding stone, refractory materials, casting, anti-skid sand.
Qingyun White fused alumina is a high-grade refractory materials, its main crystalline phase isa-Al2O3, color white, with characteristics of large volume density, low porosity, volume stability and good thermal shock resistance and other . fused alumina is for large steel castings in daily use, especially type alloy castings, sand core surface coatings and investment casting system shell material, the same time as hardened steel, alloy steel and other semi-fine grinding, abrasive grinding , fused alumina sand, Qingyun White fused alumina powder is the best material layer material in place of zircon sand .The castings made of Qingyun White fused alumina have a good gloss.
The Qingyun white fused alumina made by Qingyun Refractories Co., Ltd. Is harder and brittler than brown fused alumina. Also the cutting force is stronger. Good chemical stability, excellent insulation properties. Scope: to do solid structure and coated abrasive tools, wet or dry spray sand for crystal, ultra-fine grinding and polishing of the electronics industry and production of advanced refractories. Suitable for machining hardened steel, alloy steel, high-speed steel, high carbon steel and other hard hardness, tensile strength greater material. fused alumina abrasives can also be used as catalyst, insulation and precision casting sand.
Classification of according to mesh size
Common Specifications: sand particle size: 16,20,24,30,36,46,60,80,100,120,150,180,200,220 (mesh)
White fused alumina period of sand, micro powder, powder, grain sand .
Performance and advantages of Qingyun White fused alumina grain sand
1, does not affect the color of the workpiece;
2, can be used to blast in non-iron remaining manufacturing process;
3, Powder grade is suitable for wet blasting and polished work;
4, processing speed, high quality;
5, the amount of iron oxide contained in low iron suitable for sandblasting residues of prohibited jobs.
Physical and chemical indicators of Qingyun white fused alumina
Coconut shell activated carbon using high-quality coconut shell as raw material, carbonization, activation, and post-processing technology from refining. Appearance is black, granular. Products are:
Developed pore structure, adsorption rate, adsorption cycle is short,
Low impurity content, surface cleanliness, high abrasion resistance,
Rounded edges and corners, uniform size, repeated regeneration characteristics of use.
Quality coconut shell activated carbon - new materials
Coconut shell activated carbon can be made of many kinds of carbon-containing substances, these materials include wood, sawdust, coal, coke, peat, lignin, stone, hard shell, sugar pulp, bone, lignite, petroleum residues and the like. Including coal and coconut shell activated carbon has become the most commonly used raw Youdou.
High-quality coconut shell activated carbon - Production Process
Activated carbon manufacturing process is basically divided into two:
The first process involves dehydration and carbonization, the raw material is heated at a temperature of 170 Zhi 600 drying, the original organic matter charring about 80%.
The introduction of copper ore sand
Copper ore sand is a kind of abrasive , also known as copper slag, is slag produced after separation and extraction of copper ore by smelting copper, also known as slag. Copper ore sand is made into specifications by crushing, screening the slag according to different uses and needs Copper ore has characteristic of high hardness, angular shape, grinding fast, good jet effect, low soluble chloride ion content, minimal dust during sanding, no environmental pollution. Copper ore rust better than quartz sand and other sand blasting, and low price, high recycling rate, very substantial economic benefits. For this reason, it is rust remove abrasive that major repair plants, shipyards and large steel corrosion engineering use for recent decades .
Performance characteristics of copper sand
Color: black, brighter than the black corundum
Shape: irregular water chestnut
Mohs hardness: 6-7
Apparent density: 3.5 *103
Moisture content: 0.019
Conductivity: 4.12
Soluble chloride ion content: 0.00013
Advantages of copper ore sand
Quartz sand introduction
Quartz sand is made of quartz stone crushing. Also known as quartz silica, is a hard, wear-resistant, chemically stable silicate mineral salts. Quartz sand with silicon carbide, silicon carbide, black corundum and brown fused alumina, etc. Belongs to refractory materials.General in industrial quartz sand often divided into: ordinary quartz sand, quartz sand refined, high-purity quartz sand, fused silica sand and silica fine powder. Sio2 content of between 85% and 95% referred to ordinary quartz sand; sio2 content of more than 95 percent called refined quartz sand. Quartz sand is an important industrial mineral raw materials, non-hazardous chemicals, widely used in glass, foundry, ceramics and refractories, silicon iron smelting, metallurgical flux, metallurgy, construction, chemicals, plastics, rubber, abrasive and other industries. Can motor, rail transport, water transport.
Physicochemical properties
Quartz sand is a hard, wear-resistant, chemical stability of silicate minerals, the main mineral component is sio2, quartz sand color is white or colorless, translucent particles, brittle, oil sheen, density is 2.65, its chemical , thermal and mechanical properties have obvious anisotropy, do not dissolve in acid, slightly soluble in koh solution, the melting point of 1750. Qingyun refractories company production of quartz sand has no impurities, high mechanical strength, chemical stability, good economic characteristics.
