When bentonite was been processed in grinding line, the ball mill with two warehouses or three warehouses is important grinding plant. But in general, the grinding efficiency of ball mill is low. If bentonite before processed can be pre ground by other crushing or grinding equipment, the efficiency can be improved greatly.

In a word, pre grinding process is an important technology. On the one hand, putting bentonite into pretreatment device can make efficient grinding machine substituted for low-efficiency ball mill. On the other hand, reducing the input size of materials can improve capacity and reduce electricity consumption. Besides, pre grinding machine can adopt both one pass grinding method and circulating grinding method with classifier. In bentonite pre grinding system, it often adopts rolling machine or specialized trapezoidal grinding machine to connect with ball mill as pre processing device. This method can improve efficiency and save energy, and the quality of bentonite is guaranteed.