How to improve the wear resistance of alumina grinding balls

Alumina grinding balls are an important grinding medium in the current grinding industry market. It is also a ceramic ball that is in large demand in the grinding materials of ball mills. Alumina grinding balls are undoubtedly good in grinding and wear resistance. How to improve alumina grinding balls What about the wear resistance?

First of all, the choice of Al2O3 as the raw material for alumina grinding balls is very important

The choice of Al2O3 directly affects the final quality and grinding performance of the alumina balls. The particle size of the Al2O3 raw material will also directly affect the resistance of the alumina grinding balls. Abrasive, when the Al2O3 raw material particles are smaller, its wear principle will undergo plastic deformation and partial transgranular fracture, and then slightly wear. When the Al2O3 raw material particles are larger, its transgranular fracture will occur. It will be greatly improved, and serious wear will occur. Therefore, from the analysis of the above two points, the smaller the grain size of the Al2O3 raw material, the better the wear resistance of the alumina grinding ball. It is recommended that you buy Al2O3 raw materials in the future. At this time, it is preferable to use the Al2O3 raw material with smaller grain size.

Secondly, it is necessary to 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 finally improving the wear resistance of the alumina grinding ball.

The other is the forming process of alumina grinding balls

Large-diameter alumina balls generally adopt two forming methods: roll forming and isostatic pressing. Roll forming and isostatic pressing technology have changed other forming methods. The disadvantages of non-uniformity such as hollow, layering, etc., the size and shape of the raw materials just mentioned will also affect the roll forming and isostatic pressing. Therefore, the use of suitable raw materials will also affect the compactness of the ball-shaped body.

After drying the alumina ball, the firing process of the alumina grinding ball is next. The firing stage of the alumina grinding ball is also very important. When the proper sintering temperature is not grasped, for example, the sintering temperature is too high. Higher or longer holding time will promote the growth of Al2O3 crystals and increase the amount of liquid phase, which will not only reduce the strength of the alumina grinder but also cause the most important wear resistance of alumina grinding balls; when the sintering temperature is too high When it is low, the sintered density will be greatly reduced, which will also cause the wear resistance of the alumina grinding ball to decrease. When the sintering temperature is not appropriate, even if the content of Al2O3 is high, the wear resistance of the alumina grinding ball is not necessarily It will be good. When we use a suitable sintering method, such as low-temperature fast firing, it will greatly improve the energy-saving benefits. At the same time, it will also control the grain growth of the 7 alumina grinding balls, thereby improving the strength and toughness of the alumina grinding balls. , And finally greatly improve the wear resistance of alumina grinding balls. Achieve the most ideal effect and greatly improve work efficiency