1. The greater the spindle speed, the greater the centrifugal force obtained by the grinding media, and the greater the speed difference between the grinding media, the greater the shear and friction forces. The greater the linear speed of the rotor, the less grinding time required to reach the percentage of particle size particles

　　2. The influence of the specific gravity of the grinding media on the efficiency of the sand mill, there are many types of grinding media, and their specific gravity is different. From the perspective of dynamics, the greater the specific gravity of the grinding medium, the greater the energy it can obtain, and the impact and shear force will increase accordingly, and the grinding efficiency will increase. In addition, it should be considered in combination with the specific gravity of the material. , The greater the difference between the specific gravity of the grinding medium and the material, the better the grinding effect. Generally, zirconium beads with good surface hardness and mechanical strength (zirconium silicate beads, zirconium oxide beads, pure zirconium beads) are used as grinding media.

　　3. The influence of grinding medium diameter on the efficiency of sand mill. The grinding diameter is related to the maximum particle size of the raw material. The larger the largest particle size of the raw material, the greater the strength of the material itself. A large diameter of the grinding medium is required to enable the grinding medium to have sufficient dispersion and grinding ability. However, the larger the particle size of the grinding medium, the larger the final product size

　　4. The influence of the filling rate of the grinding media on the grinding efficiency. The greater the filling of the grinding media, the greater the contact frequency of the grinding media, and the greater the dispersing and grinding capacity, the smaller the product particle size during the same grinding time. In addition, the filling rate of the grinding medium is related to the viscosity of the material and the temperature of the material during grinding. For low viscosity solvents and water-based inks, the filling rate can be slightly larger. After repeated experiments. The filling rate of wet grinding sand mill is 70%-80%.

　　5. Density of grinding media:

　　In theory, under the same conditions, the greater the density of the grinding beads, the greater the impulse and the higher the grinding efficiency, and the wear on the contact parts of the sand mill (inner cylinder, pin and dispersion disc, etc.) will be relatively large. Low-density grinding beads are suitable for low-viscosity slurry, and high-density grinding beads are suitable for high-viscosity slurry.