Force Analysis about the Ball Mill Parts

In the electricity, coal, building materials and the metallurgical industry, ball mill has a wide application and is the key equipment in the powder production line. The grinding ball is the wearing part in the ball mill, which directly affects the working condition of the grinding machine and the powder quality. Through the force analysis of the ball mill, we can get the wear reason of the grinding ball and provide a theoretical foundation for the improvement process of the grinding machine.

The grinding process of the material in the grinding machine is finished through the impact force and the grind force that are generated by the rotation of the grinding machine. The grinding balls in the grinding machine do regular rotation along the cylinder. Grinding balls with the cylinder are rotating continuously to improve its position. When they reach the certain height, the grinding balls will no longer rotating with the cylinder, and then they will fall down in a parabolic trajectory.

When the grinding balls are rotating in the ball mill, the grinding balls and the materials will be elevate to the certain height through the friction and centrifugal force. On the one hand, the grinding balls do circular motion along the cylinder; on the other hand, the grinding balls and the materials do random relative motion. During the complex operation process, the grinding balls bear the impact and grind force. The outermost grinding balls bear the maximum impact force.