RP-G ceramic grinding balls are widely used in industries of ceramics, glass, porcelain enamel, pigment, chemicals, etc. They are suitable for applications for ball mill, sand mill, pot mill librating mill and other fine breaking plants with high hardness, high density and anticorrosion. Available sizes: 10mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 60mm, 70mm, 80mm RP-G92 RP-G90 RP-G85 Al2O3, % More than 92 More than 90 More than 85 SiO2, % Less than 4 Less than 5 Less than 10 Fe2O3, % Less than 0.2Less than 0.2 Less than 0.3 Bulk density, g/cm3 3.65 3.55 3.4 Abrasion, % 0.01 0.15 0.02 Hardness, Mohsí» 9 9 8.5 Water absorption, % 0.01 0.01 0.01 Crush stength, Mpa/m3 2200 1800 1700.