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White corundum

White corundumThe hardness of white corundum is slightly higher than that of brown corundum, but the toughness is slightly worse. It is easy to cut into the workpiece when grinding. It has good self-sharpness, small heat generation, strong grinding ability, high efficiency and higher price than brown corundum.

Production Process

Alumina powder → electrolytic smelting → crushing → magnetic separation for iron removal → fine screening → physical and chemical inspection → finished product packaging → storage

Application of white corundum

Suitable for high hardness steels, such as high speed steel, high carbon steel, hardened steel, alloy steel, etc.


  1. White corundum has the advantages of high temperature resistance, corrosion resistance, high hardness, high strength, wear resistance, good crystallinity, and low expansion coefficient.
  2. Bulk density is 3.5 g / cm3, spectral hardness is 2000-2000 Kg / was, .9.0 Mohs hardness. The color after calcination is white and dark blue. The maximum operating temperature is 1900 ° C and the melting point is 2250 ° C.
  3. The texture is dense, the hardness is high, and the particles form sharp corners. Can be sieved into various particle sizes

Technical index

Application specification Main chemical composition%

Al2O3 Na2O SiO2
Abrasives F 12#—80# ≥99.4 ≤0.4



≥99.3 ≤0.4 ≤0.03
180#—240# ≥99.3 ≤0.4


Abrasives W

1#-63# ≥99.3 ≤0.4 ≤0.03
Refractory 0-1,1-3,3-5,5-8,8-12mm ≥99.3 ≤0.4









White Corundum Display Video

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