We produce the best quality graphite crucibles and dies with the best quality isostatic graphite for jewellery industry.
We offer casting crucibles, melting crucibles, and graining crucibles for all casting machines.
Beijing Great Wall Co.,Ltd.,are a manufacturer of graphite & carbon products in China and one of the competitive graphite suppliers all over the world .
GW ’s commitment is to supply high quality graphite material, carbon and graphite composites, formed graphite parts.
Please feel free to contact us via savi at bjgreatwall dot cn if you have any enquiry or questions.
Abrasives black fused aluminium oxide
Black fused alumina, also called black fused aluminium oxide, black aluminum oxide, is a black color artificial corundum for abrasives. It's made of fusion of bauxite and reducing agent in electric arc furnace. Black fused aluminium oxide has certain content of ferro oxide and silicon oxide, which make it looks black. Black fused aluminium oxde has moderate hardness, less heat during abrasives, good strength and can be used for sand blasting, polishing, grinding of stainless steel and other non-metal surfaces. It can also be used for production of grinding wheel and cutting wheels.
Production of grinding wheel, cutting wheel and other abrasive tools
Sand blasting and polishing on aluminium, stainless steel and other metal surfaces
Grinding and polishing on non-metal surfaces like ceramic, plastic, glass, wood, laminate, bamboo etc.
Rust removal, clean and polishing of mold, foundry parts, metal parts, semi-conductors etc.
Surface treatment of electric devices, telecommunication equipments, ship and vessel parts, machinery etc.
Eching, die cut of stone, ceramic, marble, glass, jewery
Pre-coating process of electroplate, coating, teflon, welding materials etc.
White fused alumina for refractories
White fused alumina is made from redused fusion of high purity alumina powder whose content is aluminium oxide(al2o3). It has very high refractory temperature, acid and alkali corrosion resistant, stable in chemical content, high true gravity/density, low porosity rate, thermal shock resistant. It's an excellent corundum aluminium oxide refractory material. White fused alumina refractory grades is an important high end material for production of shaped and unshaped refractory products.
Physical and chemical properties
True gravty: ?3.60 g /cm3
Bulk density: 1.5-2 g / cm3
Mosh hardness: 10
Color: white, light blue after heat treatment
Melting point: 2350 celcius degree
Linear expansion coefficient index: (7-9)*10^-6/k (0 - 1600)
Sizes available: 0-1mm, 1-3mm, 3-5mm, 5-8mm, 100mesh, 200mesh, 325mesh
Applications of white fused alumina refractory grades
Alumina bricks, alumina type refractory brick mullite box body, nozzle, spray gun, furnace and oven linear
Unshaped refractory materials like ladle pouring material, drainage sand, spraying and filling material, prefabricated parts
Refractory materials in steel making, metallurgical, cement, glass, ceramic, petrochemical industries
Precision casting and foundry sand
Black silicon carbide for refractories
Black silicon carbide(sic) we make has high hardness, low expansion rate, good chemical stability, good heat conductivity and is widely used in refractory bricks, unshaped refractories, special ceramic products, precision casting, foundry and metallurgical industry.
Physical and chemical properties
True gravity: ?3.15 g /cm3
Bulk density: 1.20-1.60 g / cm3
Mosh hardness: ?9
Color: black
Melting point: 2700 celcius degree
Sizes: 0-1mm, 1-3mm, 3-5mm, 5-8mm, 100mesh, 200mesh, 325mesh or according to request
Applications of refractory grade black silicon carbide
Various shaped and unshaped refractory produccts
Used as semi-conductor antioxidant
Used as deoxidizer in steel making industry to improve steel quality
\production of electric heating element silicon carbon rod
Inner coating on impeller of hydraulic turbine to improve its durability
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Graphite crucible is suitable for smelting
copper¡¢aluminum¡¢gold¡¢silver¡¢lead¡¢zinc¡¢
alloys other nonferrous metals. The graphite
material chosen is isostatic graphite¡¢
high strength graphite¡¢high density graphite.
ACC® Undensified Microsilica is a by-product of the production of ferrosilicon alloys or silicon metal, with SiO2 content ranging from 85% to 98%, bulk density around 300 - 400kg/m3, and light gray color. They are classified as Grade 85U, Grade 92U, Grade 94U,Grade 96U and Grade 98U. It is collected, and packed from our ferrosilicon or silicon metal factories directly, the automatic and integrated production process guarantees the consistent quality.
ACC® Undensified Microsilica is a by-product of the production of ferrosilicon alloys or silicon metal, with SiO2 content ranging from 85% to 98%, bulk density around 300 400kg/m3, and light gray color. They are classified as Grade 85U, Grade 92U, Grade 94U,Grade 96U and Grade 98U. It is collected, and packed from our ferrosilicon or silicon metal factories directly, the automatic and integrated production process guarantees the consistent quality.
Silica fume, also known as condensed silica fume or microsilica, is a spherical sub-micron amorphous silicon dioxide used in many applications.
Silica fume is a co-product of silicon or ferrosilicon production, consisting of ultrafine (sub-micron), amorphous, non-porous, perfectly spherical silicon dioxide (SiO2) particles, with purity levels of 85 to 99 %.
The main effect of these ultra-fine particles is to greatly improve particle packing and produce a highly pozzolanic reaction in concrete and other cementitious bond systems where the silicon dioxide reacts with calcium hydroxide, heightening performance levels and the strength and durability of these materials.
Additionally, silica fume, because of its amorphous (non-crystalline) structure and its specific area, provides other useful features to various applications, including improved sintering capabilities and enhanced high temperature performance of refractory castables, resulting in reactions between microsilica and other components of the refractory mix.
To summarize, silica fume has two key features which alone or in combination are the basis for its high performance:
The nano-sized spherical non-porous particles create an efficient "filler effect"
Primary particles have an average diameter of about 0.15 �¼m (150 nanometers)
Microsilica is a highly reactive form of silica producing a "chemical effect"
Thanks to its amorphous nature and high specific surface area.
Item No Index Measured Value
Appearance White powder Compliance index
Specific surface area of nitrogen adsorption m/g 200±10 200
Sio2- content >99.8 99.9%
PH 3.7-4.5 4.19
Volatile matter % at 105 �ºC â?¤3.0 0.82
Tamping density g/dm�³ 30-60 31
Sieve residue(45�¼m) mg/kg â?¤250 19.93
Fumed silica is a very useful industrial chemical used in a variety of industrial and consumer products. Fumed silica poses a variety of health hazards to workers in various end-use industries and to those using products that use fumed silica.
1. in various resin additives, medicine, food and other fileds.
2. rubber, sealant, silica gel, adhesive, tile grout etc.
3. paint, coating, UPR,
4. CMP suspension etc;
5. Digital photo paper etc.
1> Desiccant material: Bentonite and Montmorillonite;
2>Color: Gray/Cyan/Reddish Brown;
3>Size: 0.5-2mm, 1-4mm, designed;
4>Shape: Irregular and Ball Shape;
5>Packing material: Double layer waterproof plastic bag;
6>Capacity: 10g / 50g / 100g / 500g / 1000g / 1500g / 2000g designed per needs;
7>Package style: Three side seal / Central seal / Four side seal;
8>Adsorption rate: over 18%-50%, depend on using environment;
9>Certification: REACH / ROHS / SGS / ISO;
10>Application: Special for Warehouse Storage & Container Shipping;
11>Using qty: Depend on season/sea route/cargo type, use 30% more for better ;protection and performance;
This product is customized as drilling mud based on good quality attapulgite clay. And it is applicable to geological drilling, marine drilling and geological drilling in salt containing area. It features good thermal stability and salt resistant property, therefore, the number of rejected wells will be small while using it to protect the wall of wells, and the drilling efficiency is improved and the cost is cut down as well.
Production performance and its application
1. This product features good colloidal and suspending properties, and is suitable to be used as drilling mud under various geological conditions.
2. Because of good thermal stability, it shows no flocculation or dilution under high temperature, therefore, it is applicable to deep drilling and terrestrial heat drilling.
3. Its salt resistant ability makes it free from being affected by electrolytes, thus it can still be in mud form even in saturated brine. It is appropriate for marine and salty stratum drilling.
Technical specifications (conform with GB5005-2002) API-13
Preparation of product
Add water to the product and stir the mixture in a homogenizer for 20 minutes. Then put in synergist and dehydration-weakening agent, etc. to prepare the required mud.
Packing material and specifications
Braided bags, paper-and-plastic bags and paper bags Specifications (as per bag):
25kg , 40kg , 500kg and 800kg
Anyang Lishi Industrial Co., Ltd. is a professional Sodium Feldspar Manufacturer that specializes in providing raw materials for the Ceramics, Glass, Coatings Material, Plastic, Refractory, and also applicable in various other industries, including paints, rubber, soap, construction materials, water filtration, abrasives, and fertilizers.
Our sodium feldspar production facility covers an area of 45,000 square meters and is equipped with state-of-the-art production equipment, a factory laboratory, and a testing center. This ensures that we can deliver high-quality sodium feldspar products to our customers.
As one of the top sodium feldspar suppliers in China, we have our own sodium feldspar mines, strict quality control, timely delivery, and professional services. We serve customers in over 200 countries, including Vietnam, the Philippines, Russia, Italy, Mexico, the United States, Morocco, and more.
Sodium Feldspar Forms:
Grains 0-10mm,
Powder (100-1250 Mesh).
â?¢ Sodium Feldspar Package:
1000-1300kg per bags.
Advantages of Sodium Feldspar
High sodium and High aluminum content, has nepheline properties and good transparency
Low Silicon and without free silicon, it's harmless to the body
Na 11% around, Fast burning at a lower temperature, save cost
It is made of the best quality bentonite as raw materials and is very popular with cat owners who want a clumping, low-tracking litter with no mess. The unique leading dust removal process can keep the household environment refreshing for a long time. So it's your perfect choice for your family cat or multi-cat families with super odor control.
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