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China supplir Black corundum for steel sandblasting

Product: Black corundum

Raw material: Bauxite

Color: Black

Usage: Stainless steel sandblasting

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

Packing: 25kg/bag


Black corundum, also known as black fused alumina, is a kind of gray-black crystal with α-Al2O3 and iron spinel as the main ore phase . Black corundum are produced by melting aluminum bauxite in an electric arc furnace in a high temperature. For its high hardness and toughness characteristic, t can be used for mental like stainless steel sandblasting.

Features of Black corundum

  1. Higher hardness
  2. Strong mechanical strength
  3. Sharp, brittle
  4. Low expansion coefficient
  5. Good electric conductivity

Application of Black corundum

  • Mental polishing
  • Stainless steel sandblasting

Specification of Black Corundum

Specifications Main Chemical Composition %
Al2O3 Fe2O3 SiO2
BA—1 81—85 9—11 ≤8
BA—2 75—80 10—12 ≤10

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