Black Fused Alumina

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.

Black fused alumina, also known as low-aluminum corundum, is a gray-black crystal with α-Al2O3 and iron spinel as the main ore phase, which is obtained by melting aluminum bauxite in an electric arc furnace. It is characterized by low Al2O3 content. There is a certain amount of Fe2O3 (about 10%), so it has the characteristics of moderate hardness, high toughness, high temperature resistance and stable thermal performance. It is mostly used for free grinding, such as grinding and rough grinding before electroplating of products. It is mainly used for polishing and sand blasting of stainless steel, metal products, optical glass, bamboo and wood products, and is also a novel abrasive for manufacturing resin grinding wheels, cutting sheets and abrasive cloths.

Black Fused corundum/black corundum/black fused alumina abrasive is also known as low aluminum corundum abrasive. It is also a new type product of polishing material, and it is a dark gray crystal body made α -Al2O3 and ferropicotite as main ore in the electric arc furnace by smelting the bauxite. It has characteristics of moderate hardness, high toughness, high temperature resistance, and stable thermal stability. It is mainly suitable for free grinding, such as coarse grinding before electroplating products, mainly for polishing and sandblasting of stainless steel, fabricated metal products.Our Top grade glass polishing black fused alumina price is reasonable.

White fused aluminium oxide is made with an electric furnace from high-grade alumina powder as raw material. The resulting mineral has higher hardness and slightly lower toughness than brown fused alumimium oxide. Characterized by its high purity, strong grinding ability, abrasive tools made of it are suitable for grinding and polishing of cutting tools, precision-castings, spraying and coasting, medium body for chemical industry applications, special ceramics and high-grade refractory materials. 1 mt in a jumbo bag

Brown aluminum oxide abrasive is fused and crystallized under high temperature from a mixture of bauxite and other materials. It is characterized by its high hardness, good toughness and sharp shape in particles. Suitable for grinding metals of high-tensile strength such as carbon stele, general purpose alloy steel, malleable cast-iron and hard bronze etc. 1 mt in a jumbo bag

Specification: Purpose Grit No. Chemical composition (%) Al203 Fe203 Si02 Ti02 F4-F80 95.0Min 0.3max 1.5max 3.0max For abrasive F90-F150 94.0Min 0.3max 1.5max 3.0max F180-F240 93.0Min 0.3max 1.5max 3max P4-P80 95.0Min 0.3max 1.5max 3.0max For abrasive P90-P150 94.0Min 0.3max 1.5max 3.0max P180-P240 93.0Min 0.3max 1.5max 3max For abrasive W1-W63 92.5Min 0.5max 1.8max 4.0max 0-1mm 94.5Min 0.3max 1.5max 3.0max 1-3mm 95.0Min 0.3max 1.5max 3.0max For refractory 3-5mm 95.0Min 0.3max 1.5max 3.0max 5-8mm 95.0Min 0.3max 1.5max 3.0max 8-12mm 95.0Min 0.3max 1.5max 3.0max 0-3mm 94.0Min 0.3max 1.5max 3.0max 0-5mm 94.0Min 0.3max 1.5max 3.0max For refractory 0-10mm 94.0Min 0.3max 1.5max 3.0max 0-25mm 94.0Min 0.3max 1.5max 180mesh-0 93.5Min 0.5max 1.8max 3.5max For refractory 220mesh-0 93.5Min 0.5max 1.8max 3.5max 320mesh-0 93.5Min 0.5max 1.8max In 1MT Big Bag ,In 25kg plastic woven bag,40 bags in 1MT Big Bag

Purpose Specification Chemical composition(%) Al203 Nao Cao F12-F80 99.0Min 0.5Max 0.4Max For abrasive F90-F150 98.5Min 0.6Max 0.4Max F180-F240 98.2Min 0.7Max 0.4Max For abrasive W1-W63 97.5Min 0.8Max 0.5 Max 0-1mm 99.0Min 0.5Max 0.4Max 1-3mm 99.0Min 0.5Max 0.4Max For Refractory 3-5mm 99.0Min 0.5Max 0.4Max 5-8mm 99.0Min 0.5Max 0.4Max 8-12mm 99.0Min 0.5Max 0.4Max For Refractory 0-180mesh 98.5Min 0.5Max 0.4Max 0-220mesh 98.5Min 0.5Max 0.4Max 0-320mesh 98.5Min 0.5Max 0.4Max In 1MT Big Bag, In 25kg Plastic woven bag, 40 bags in 1MT Big Bag

Specification Chemical composition(%) Al203 Fe203 Si02 Ti02 TC 0-1mm 97.5min 0.3max 0.5max 1.0max 0.1max 1-3mm 97.5min 0.3max 0.5max 1.0max 0.1max 3-5mm 97.5min 0.3max 0.5max 1.0max 0.1max 5-8mm 97.5min 0.3max 0.5max 1.0max 0.1max 8-12mm 97.5min 0.3max 0.5max 1.0max 0.1max 180mesh-0 97.5min 0.3max 0.5max 1.0max 0.15max 220mesh-0 97.5min 0.3max 0.5max 1.0max 0.15max 320mesh-0 97.5min 0.3max 0.5max 1.0max 0.15max In 1MT Big Bag, In 25 plastic woven bag,40 bags in 1MT Big Bag

Specification: Grit No. Chemical composition (%) Al203 Fe203 Si02 Ti02 F4-F100 97.5 0.15 0.5 1.5 F120-F240 97 0.2 0.8 1.5 P4-F100 97.5 0.15 0.5 1.5 P120-P240 97 0.2 0.8 1.5 In 1MT Big Bag, In 25kg plastic woven bag,40 bags in 1MT Big Bag