Alumina grinding ball is also called high alumina ceramic ball, alumina wear-resistant ball and inert alumina ball. Isostatic pressure forming is adopted in the production process, and some small balls adopt artificial ball method; The raw material is calcined alumina powder, which has strong wear resistance, improves the stability of the product and reduces the surface wear; The calcination temperature of the product reaches 1600 ℃ or higher, and the holding time exceeds 10 hours.
Alumina grinding ball has the characteristics of high hardness, high density, low wear, smooth surface and corrosion resistance. It is an ideal anti-wear grinding medium for grinding glaze, billet and various powder materials. Used in ceramic, cement, coating, refractory, inorganic mineral powder and other industries, ball mill lining and grinding medium.
Alumina grinding ball is an important grinding medium in the grinding industry market, and it is also the grinding medium with high requirements in the grinding materials of ball mill. Alumina grinding ball undoubtedly has good grinding and wear resistance. What are the factors affecting alumina grinding ball
Firstly, the selection of raw material Al2O3 is very important for alumina grinding ball. The choice of Al2O3 directly affects the final product quality and grinding performance of alumina balls. The particle size of Al2O3 raw material will also directly affect the wear resistance of alumina grinding ball.
The second is to select appropriate sintering additives, reduce the sintering temperature of alumina grinding ball through sintering additives, so as to improve the microstructure of ceramics and the mechanical properties of alumina grinding ball, and then improve the wear resistance of alumina grinding ball.
Furthermore, the formation process of alumina grinding ball. There are two kinds of alumina grinding balls on the market: roll forming and isostatic pressing. Roll forming and isostatic pressing technology have changed the disadvantages of other molding such as hollow, delamination and so on. It is necessary to use appropriate raw materials and mature molding technology to ensure good sintering characteristics and improve the wear resistance of alumina grinder
The firing stage of alumina grinding ball is also very important. When the appropriate sintering temperature is not well mastered, for example, the higher the sintering temperature or the longer the holding time, the more the crystal growth of Al2O3 and the liquid phase will increase. This will not only reduce the strength of alumina grinder, but also reduce the wear resistance of alumina grinding ball.
When appropriate sintering methods are adopted, such as low-temperature rapid combustion, the energy-saving effect will be greatly improved, and the grain growth of alumina grinding ball will also be controlled, so as to improve the strength and toughness of alumina grinding ball and increase the wear resistance of alumina grinding ball.
