Ball mill is widely used in metallurgy, mineral, electric power, building materials, chemical and other fields, is the most commonly used crushing equipment.The grinding medium is a ball or cylinder object that rolls in a ball mill.The grinding medium of ordinary ball mill is mainly metal ball and cylinder, while in the ceramic production industry, ceramic grinding medium is mainly used, followed by natural chert and pebbles.China's listed ceramic grinding medium mainly includes alumina, zirconia, silicon carbide, silicon nitride and other series of varieties.Alumina porcelain ball is an important engineering ceramic, belonging to high - tech products.Due to the appropriate moderate hardness, density and wear resistance, corrosion resistance, the characteristics of low prices, as well as metal ball problem of the introduction of metal impurity, so white alumina ceramic ball is widely used in cement, mineral, ceramics, electronic materials, magnetic materials, paint and coatings industry such as grinding of raw materials and processing, is a kind of high quality grinding media.In the construction ceramics industry, the abrasion efficiency of alumina porcelain balls is higher than that of natural chert and pebbles.With fewer resources of high quality natural stone ball, ordinary porcelain ball wear rate high characteristic, alumina ceramic ball will be more and more used according to the different content of alumina ceramics factories, can be divided into aluminum ball, high aluminum and alumina ball we usually put 60% 65% alumina content is divided into aluminum ball, 75%, 80% alumina content are called high aluminum ball, more than 90% of the alumina content of high alumina ball.The high aluminum ball is divided into 90 porcelain, 92 porcelain, 95 porcelain and 99 porcelain.Because of its extremely high production cost, 99 porcelain is seldom produced by large manufacturers in large quantities.