High alumina ball: 　　Al₂O₃(%)：99.3 　　Bulk density(g/cm³)：3.92 　　Wear rate(%)：0.006 FEATURES: 　　Higher density; 　　Higher hardness; 　　Higher wear resistance; 　　Higher grinding efficiency. APPLICATION: 　　Minerals industry 　　Chemical industry 　　Metallic minerals like copper, silver, nickel, gold, zinc, etc. 　　Non-metallic minerals like calcium carbonate, kaolin clay, zirconium silicate, TiO₂ and other minerals 　　White pigments, coatings, paints, inks, etc.