The motor drives the grinding disc to rotate through the reducer, and the material falls from the feeding port to the center of the grinding disc. Under the action of centrifugal force, it moves to the edge of the grinding disc and is crushed by the grinding roller. The crushed material overflows from the edge of the grinding disc and is at the same time from the nozzle ring ( Air ring) The high-speed upward hot air flow is brought into the high-efficiency powder separator integrated with the vertical mill. After the coarse powder is sorted by the separator, it is returned to the grinding disc and re-milled. Collected in the dust device, it is the product. Coarse particles and metal parts that have not been carried by the hot air flow fall from the wind ring, are scraped out by the scraper, and then fed into the mill by the outer-circulating bucket elevator to be ground again.