Alumina grinding balls have the characteristics of high hardness, high density, low wear, smooth surface and corrosion resistance. It is an ideal anti-abrasive grinding medium for grinding glazes, billets and various powder materials. Used in industries such as ceramics, cement, coatings, refractories, inorganic mineral powders, ball mill linings and grinding media.
First of all, the selection of raw material Al2O3 is very important for alumina grinding balls. The choice of Al2O3 directly affects the final product quality and grinding performance of alumina balls. The particle size of the Al2O3 raw material also directly affects the wear resistance of the alumina grinding ball.
The second point: select a suitable sintering aid, and reduce the sintering temperature of the alumina grinding ball through the sintering aid, thereby improving the microstructure of the ceramic and the mechanical properties of the alumina grinding ball, and then improving the wear resistance of the alumina grinding ball.
The third point is the formation process of alumina grinding balls. There are two types of alumina grinding balls on the market today: roll forming and isostatic pressing. Roll forming and isostatic pressing technology have changed the hollow, delaminated and other non-uniform shortcomings of other forming. Appropriate raw materials and mature molding techniques are required to ensure good sintering characteristics and improve the wear resistance of alumina grinders.
The firing stage of alumina grinding balls is also very important. When the proper sintering temperature is not well grasped, for example, the sintering temperature is too high or the holding time is longer, the more Al2O3 crystals grow, and the liquid phase will increase. This not only leads to a reduction in the strength of the alumina grinder, but also reduces the wear resistance of the alumina grinding balls.
When a suitable sintering method is adopted, such as low temperature rapid combustion, the energy saving effect will be greatly improved. The grain growth of the alumina grinding ball is also controlled, thereby improving the strength and toughness of the alumina grinding ball, increasing the alumina grinding ball. wear resistance.
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