10 years manufacturer of Hi-alumina grinding ball 1.Density>3.62g/cm3 2.Wear lost<0.009 % 3.Size:10-70mm Alumina ceramic grinding ball: The products are featured by high hardness, big density, low wear lost, good normalizations, good corrosion-resistance etc. They are the most ideal high-efficient grinding media for milling glaze materials, and various powdered ore. They are using ceramics, ...