The material vertically falls into the high-speed rotating impeller from the upper part of the pulverizer, and under the action of high-speed centrifugal force, it collides and smashes with the other part of the material which is divided around the impeller in the form of umbrella. After the materials collide with each other, they will form eddy currents between the impeller and the casing to collide and rub with each other for many times, and then they will be discharged directly from the lower part to form a closed-circuit multiple cycles, It is controlled by the screening equipment to achieve the required particle size of finished products