Alumina grinding balls can be divided into multiple different types according to their alumina content. The following is the main difference between the aluminum oxide grinding ball with different alumina content:

1. Middle alumina grinding ball: The main ingredients are alumina, with an aluminum content of more than 68%, relatively hard, high strength, and strong abrasion resistance. It has a wide range of applications, especially in building materials, chemical industries, and other fields.

2. Middle-high alumina grinding ball: The main ingredients are alumina, with an aluminum content of 75%~80%, high hardness and strength, and high abrasion resistance. They are often used for grinding metals and other high-hardness materials.

3. 92% alumina grinding ball: The main ingredients are alumina, with an aluminum content of up to 92%, the highest hardness and strength, and the strongest wear resistance. It is often used for high-hardness materials such as grinding ceramics and glass.

From the different alumina content, it can be seen that the hardness and strength of the alumina's grinding balls are related to its alumina content. The higher the alumina content, the higher the hardness and strength. In addition, there are certain differences in the application range of different types of aluminum oxide grinding balls. You need to choose according to the characteristics of specific materials and application scenarios.