... 1.High alumina ceramic 2.High hardness 3.High pressure resistance 4.Low wear lost 5.High resistance to acid and alkaline Alumina Ceramic Grinding Balls (Alumina grinding balls) have characteristics of high strength, high density, high abrasion ... construction ceramics, sanitary ceramics, kaolins, refractory materials, paints, coatings and other fields. Normal size range: Diameter 20mm,25mm,30mm,40mm ...