black fused alumina

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Black fused alumina description: Black corundum is also known as low aluminum corundum. It is also a new type product of polishing material, and it is a dark 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, and mainly for polishing and sandblasting . Black fused alumina chemical composition: Grit Size Al2O3 Fe2O3 SiO2 TiO2 10#-220# 78%min 5%max 9%max 1.5-3.5% 240#-1000# 66%min 5%max 10%max 1.5-3% Black fused alumina physical property: Crystal Trigonal system Color Black True density 3.59g/cm3 Melting tempetrature 18500c Mohs hardness 9 Black fused alumina usage: 1.For polishing of stainless stelel and non-ferrous metals. 2.Widely used for grinding and polishing of optical glass. 3.High refractory material.

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Henan Sicheng Company Limited

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