... 2.AL2O3>25% 3.Covering and supporting the catalysts 4.Ceramic tower packing We produce high alumina balls of 90-92 ... mechanical strength and good wear-resistance, high chemical stability, Grinding ceramic ball has been used widely in ball mills as abrasive ... in ceramic, cement, paints, pigments, chemicals, pharmaceuticals, paint industry. We produce high alumina balls of 90-92%, 95%, and more than 99 ...