Why Do Planetary Ball Mills Use Grinding Balls Of Different Sizes?

When many planetary ball mill users receive grinding balls from planetary ball mill manufacturers, a set of grinding balls always has various sizes of balls. Why do planetary ball mills use grinding balls of different sizes?

Experimental results show that balls of different sizes have better grinding effect and efficiency than balls of a single size.

In the grinding process of planetary ball mills, grinding balls play a vital role. The ball mill drives the material and grinding balls to operate, and the kinetic energy of the grinding balls continuously acts on the materials, so that the materials are crushed or mixed to an ideal state.

Experimental results show that balls of different sizes have better grinding effect and efficiency than balls of a single size. If only small balls are used, it is obvious that the energy is too small and the efficiency is low. If only large balls are used, although large balls have large energy, they act less times at the same time with the same mass, and according to Davis' grinding ball wear hypothesis, the wear rate of the balls is proportional to the mass.

Planetary ball mills use grinding balls of different sizes. Large balls have high energy and strong effect on large materials. Small balls fill the gaps between large balls and have corresponding effects on materials of different coarseness and fineness, thus improving grinding efficiency. The two complement each other to make the efficiency and effect of planetary ball mills even higher.