After the large material is crushed to the required size by the jaw crusher, it is sent to the storage hopper by the hoist, and then the material is sent to the main grinding chamber of 4 MTW175 European grinding machines uniformly and continuously by the belt conveyor for grinding.The material after grinding is sent to the sorting machine by the air flow of the fan for classification. Under the action of the impeller of the sorting machine, the material that does not meet the requirements of fineness falls into the grinding room for re-grinding. The qualified material enters the cyclone collector through the air chute for separation and collection, and is discharged by the discharging device for the finished powder.