Brown fused alumina is made of bauxite, carbon material, and iron filings, which are melted and reduced at high temperature in an electric arc furnace. It is a brown or brown-red artificial fused alumina. aluminium oxide Brown fused alumina is the core product of the abrasive industry, so it is named Brown corundum abrasive. The main chemical composition of brown corundum is AL2O3, its content is 94.5%-97%, and it also contains a small amount of Fe, Si, Ti and other trace elements.
The common name of brown corundum is also known as emery abrasive and abrasive brown corundum. It has a wide range of industrial applications and is mainly used in refractory materials and abrasives industries. Specifications and models include: F sand (grain size sand), section sand, fine powder, micro powder, etc. Abrasive tools made of brown corundum abrasives are suitable for grinding metals with high tensile strength, such as general steel, malleable cast iron, hard bronze, etc.
Physical indicators of brown corundum
Color: dark brown (dark blue after sintering) Crystal form: trigonal system Hardness: (Mohs) ≥ 9.0 Melting point: (?) 2250
Maximum operating temperature: (?) 1900 True density: (g/cm3) ≥ 3. 90 Coefficient of linear expansion: (0—1600?) 7-9
Brown corundum grade
Brown fused alumina can be classified according to the content of AL2O3. The first grade brown fused alumina abrasive contains more than 90%, the second grade brown fused alumina contains more than 80% brown fused alumina, and the third grade brown fused alumina contains more than 70% of its abrasive. hsl abrasive Different from some other factors.