The closed-circuit grinding system, all ground materials are led into a separator and classified into refined powder (products) and coarse powder (return powder). The coarse powder is returned to the ball mill and ground again with newly-fed raw materials. Following benefits can be realized with this technology:

Grinding capacity increases;

Grain size distribution of refined powder becomes sharp;

Refined powder temperature is reduced;

Power consumption rate decreases;

The abrasion of liners and balls is suppressed;

Grain size distribution of products can be adjusted by changing the circulation ratio and the classifier’s run status.