... : 75% al2o3 the size; dia 30.40.50.60mm Obtained patent Product NameMedium grinding ball FeaturesThe Products, featured by high hardness, high ... ball mill on ceramics, cements, paints, refractories, inorganic mineral powders. Product Description/Specification AL2O3(%) ≥75 CaO(%): 2.86 MgO(%) :2.33 ...