When the ultra fine mill is working, all grinding rollers are rolling, then the materials are driven to the edge of the turn plate by the centrifugal force, fall down into the grinding chambers where the materials are repeatedly pressed, crushed by the rollers.
The high-pressure air blower constantly inhales air within ultra fine mill in turn, the airflow with crushed materials are brought to the classifier whose high-speed impeller will screen the airflow: the unqualified particle size will fall and return to the mill for being reground while the qualified particle size mixed with air will go into the cyclone powder collector.
Most of the qualified powders will fall and exit from the discharging valve at the bottom; a small proportion of the fine powders, with airflow, move to the dust cleaner, and clings to the surface of the filter bags. At the same time, the fine powders clinging to the surface fall down by the sudden vibration of the filter bags, which are caused by the instantly ejected high-pressure gas controlled by the pulse valve. The materials from the above two lots are sent by the conveyor at the bottom to get finished powders packed. In addition, filtered clean air will be emitted from the air outlet of the muffler in the end.