Effect of zirconia ball milling bead mass ratio and ball to material ratio on grinding
The planetary high-energy ball mill is used to prepare ultra-fine powder. Its working principle is that the grinding tank smashes the material under the action of the combined force generated by the revolution and rotation of the grinding ball during operation. The factors that affect the ball milling effect are the ball milling time, the ball milling speed, and the solid content of the ball milling material. Among them, the mass ratio of ball to material and the mass ratio of different balls are very important control parameters.
The larger the mass ratio of the ball to the material, the more the amount of zirconia grinding ball media, which will increase the shear stress and impact frequency of the material, thereby ensuring a better pulverization effect. However, as the mass ratio of balls to material continues to increase, the self-wear between the zirconia grinding balls will increase, which reduces the interaction between the balls and the material to a certain extent, resulting in a decrease in the content of fine particles, uneven grinding, and large particles. more, the energy consumption will also increase. At the same time, the increase of the mass ratio of pellets will lead to the increase of impurities in the material; if the mass ratio of pellets is too small, the particle crushing efficiency is low. Therefore, there is a range for the mass ratio of pellets.
If other parameters remain the same, there is also a range of different ball mass ratios. From the analysis of the size of the zirconia grinding ball, the larger the size, the better the impact effect, which is conducive to crushing coarse and hard raw material particles, but the rolling area decreases, which is not conducive to fine particle grinding. , the two restrict each other, so it is a size match. Only when the mass ratio of the balls and the quality of the different balls are compared, the best impact grinding effect of the grinding balls can be ensured, thereby improving the efficiency of the ball mill and maximizing the output.
There is no fixed value for the ratio of ball to material and the size of ball milling beads. There are many factors involved: such as ball milling equipment, initial particle size of ball milling materials, grinding fineness, specific gravity of grinding beads, size and so on.
