Compared with grinding equipment such as ball mills, roller mills, and colloid mills, sand mills have the advantages of high production efficiency, strong continuity, low cost, and high product fineness. The process conditions vary greatly, and the fineness requirements can be adjusted and classified by adding or subtracting grinding media in an appropriate amount.Generally, there are vertical sand mills, horizontal sand mills, basket sand mills, double-cone rod sand mills, nano-level horizontal sand mills, except that the vertical sand mills use ordinary 2-3/ In addition to 3-4mm glass beads, other equipment uses 0.8-2.4mm zirconia beads.