What is the principle of HGM series grinding machine?

First, large raw materials are crushed by the jaw crusher to the size specified (powder and small size material is no need to be crushed by jaw crusher), then transported into hopper by bucket elevator vertically, then trough the hopper fed into the main mail by electromagnetic vibrating feeder continuously and evenly. The ground fine powder in the main mill is carried out by the airflow from the blower, and then separated by classifier above the main mail. The fine powder are blow into the cyclone collector, where separate with airflow, and are poured out through the discharge valve as the final products, and the rough stuff after the classifying will be recycled back into the grinder chamber for regrinding. Machine's airflow system is closely sealed up and circulated, under condition of negative and positive pressure.