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 the 2 sets MTW175 grinding machines by the belt conveyor.The material after ground is sent to the sorting classifier by the air flow of the fan for classification. Under the action of the impeller of the classifier, the material that does not meet the requirement of fineness falls into the grinding room for re-grinding. The qualified material enters the cyclone for collection, then discharged by the discharging device as the finished powder.