Alumina grinding balls are suitable for both wet and dry grinding of alumina powder, zirconium silicate powder, quartz, feldspar, kaolin clay and limestone. In ceramic industry, alumina balls are widely used in the fine grinding of glaze and ceramic body for tiles, sanitary ware and tableware. Our alumina balls includes (classified according as alumina contents): 92# alumina ball, 90# alumina ball, 75 # alumina ball. Typical properties of alumina ball Items 92MQ G90MQ T90 B90MQ Al2O3(%) ≥92 ≥90 ≥90 ≥90 Mohs Hardnes 9 9 9 9 Wear resistant coefficient (g/ kg. h) <01.2 <0.12 <0.20 <0.30 Water absorption（%） ≤0.01 Bulk density（g/cm3） ≥3.60 ≥3.60 ≥3.55 ≥3.50 Typical properties of 75# alumina ball Items 75MQ 72MQ 72MQ Al2O3(%) ≥75 ≥72 ≥72 Bulk density (g/cm3) ≥3.2 ≥3.1 ≥3.0 Wear resistant (%) <0.20 <0.25 <0.45