In fact, there are many reasons for stones in the discharge of cement raw material milling, such as improper steel ball filling rate, unreasonable steel ball ratio, cyclone problems, etc.

The steel ball filling rate of cement raw material milling is not appropriate. Every designed cement raw material milling will have a reasonable steel ball filling range value.

When the loading capacity of the cement raw material milling steel ball exceeds a certain limit, the dead zone (the steel ball is in the inner layer of the cement raw material milling and in the area where it rotates near itself, and the grinding effect is very small) will be significantly expanded, so the crushing and grinding effect will be reduced, the grinding efficiency will be reduced, and the consumption will be increased.