Brown fused alumina slag-fesi
During fusion process of brown fused alumina, the iron and metal content(mainly ferro and silicon)settle at the bottom of the arc furnace because of their higher density. After cooling down, it seperated from brown fused alumina whose content is aluminium oxide(al2o3). We select the settled metal part, crush and grade it into grains suitable for various industrial purposes. Its main content is ferro and silicon and can replace some fesi. We call it brown fused alumina-fesi. So the manufacturing process of brown fused alumina slag fesi is different from normal fesi.
Because silicon is easy to react chemically with oxygen to become silicon oxide, it is used as deoxidizer in steel making industry. Silicon oxide(sio2) also produce a lot of heat, so can improve the temperature of steel. Fesi is also widely used in low alloy structural steel, spring steel, bearing steel, heat resistant steel etc. Its ferro content is typically 76%-80% and silicon content 13%-17%. Sizes can be made according to customer quest, common sizes are 0-10mm, 0-25mm etc.
Applications of brown fused alumina slag-fesi
Because of its hardness, it's used for sand blasting, rust removal, cleaning, polishing etc.
Deoxidizer in steel making industry to improve strength, hardness and density of steel.
Used as inoculant to help graphite precipitation
Used as reducing agent in steel alloy industry.
Newly development products like mineral processing, lithium ferro battery etc.
Pink fused aluminium oxide
Pink fused alumina, also called pink fused aluminium oxide, chromium aluminum oxide, abbreviated as "pa", belongs to the group of artificial corundum. It's made from fusion of high purity alumina powder and chromium oxide in electric arc furnace. Because of its chrome content, it's a pink color material. Its main content is aluminium oxide(al2o3), with little content(about 0.7% chromium oxide and about 0.3% sodium oxide(na2o). Pink fused aluminium oxide is a hard, tough, self-sharpening, low magnetic, coarse grits, pure and clean abrasive material. Compared to white fused aluminium oxide, it has similar hardness, while better strength and cutting side. It's widely used in production of vitrified grinding wheel, resinoid grinding wheel, cutting discs, grinding head and other abrasive tools, also for sandblasting abrasvies, polishing, free grinding, cutting etc.
Physical and chemical properties
True gravity: ?3.9 g /cm3
Bulk density: 1.40-1.91 kg / m3
Mosh hardness: 9
Color: pink, light purple
Melting point: 2200 celcius degree
Sizes: f8-f220
Applications of pink fused aluminium oxide
Production of ceramic and vitrified grinding wheel
Grinding head and other bonded abrasives and coated abrasive tools
Refractory bricks, glass oven and other refractory materials
Free grinding and polishing on precision devices, mahinery parts, ceramics, precision casting etc.
Clean, sand blast, polish, rust remove metal and non-metal parts
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.
Physical and chemical properties
Size#
Al2o3
Sio2
Fe2o3
Tio2
F24-f100
77.00min
11.0min
5.0min
1.5-3.5
F120-f220
75-81
9-12
4-6
2-3
True gravity: ?3.5 g /cm3
Bulk density: 1.65-1.95 kg / m3
Mosh hardness: 8
Color: black
Melting point: 2050 celcius degree
Sizes: f8-f220
Applications of black fused aluminium oxide
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
Green silicon carbide for refractories
Green silicon carbide(sic) can also be used for refractory applications because of its high strength, low expansion rate and good thermal conductivity for refractory materials, special ceramics, coating and plastic fillings etc.
Physical and chemical properties
True gravity: ?3.15 g /cm3
Bulk density: 1.20-1.60 g / cm3
Mosh hardness: ?9
Color: green/light green
Melting point: 2700 celcius degree
Sizes: 0-1mm, 1-3mm, 3-5mm, 0-10mm etc.
Applications of refractory grade green silicon carbide
Products of various high grade shaped and unshaped refractory materials
Used for semi-conductor deoxidizer
Used as deoxidizer in steel making industry to improve quality and productivity of steel
Production of silicon carbide rod in electric thermal industry
