... as grinding media in ceramics, cements, paints, refractories, inorganic mineral powders, and other industries. With high hardness, high density, ... as grinding media in ceramics, cements, paints, refractories, inorganic mineral powders, and other industries. Al2O3 60-70%, 90-95%, ... you best price.Also alumina ball can be made according to user's special requirements. Alumina Ceramic Ball Grinding Media