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High quality Black fused alumina products for sale

Product: Black fused alumina

Raw material: Bauxite

Color: Black

Usage: Abrasive tool/ media

Common size: 16 24 36 46 60 80 120 mesh etc.

Packing: 25kg/bag


Black fused alumina also known as black corundum, gray-black crystal with α-Al2O3 and iron spinel as the main ore phase produced by melting aluminum bauxite in an electric arc furnace, its Al2O3 content is about 70-85%

Features of Black fused alumina

  • Moderate hardness
  • High toughness
  • Temperature resistance
  • Stable thermal performance

Application of Black fused alumina

  • Free grinding, such as floor polishing before electroplating metal parts and aluminium products.
  • Bicycle, motorcycle, sewing machine, clock parts.
  • Plastic and hardware tools, such as polishing, is also suitable for sandblasting (spray derusting, glass flower).
  • Processing and manufacturing resin cutting, angle grinding pills and coated abrasive, etc.
  • Black corundum sand and micro powder, especially suitable for the grinding and polishing of stainless steel work pieces and the manufacture of grindstone and abrasive paste.

Specification of Black fused alumina

Item Indicators
Color Black
Crystal Trigonal system
Hardness (Mohs) ≥ 9.0
Melting point (°C) 2050
The maximum temperature (°C) 1850
True Density (g/cm3) ≥ 3. 50

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