If the consumption is too large, the loading capacity will be further increased and the output will be reduced. Besides the rated output, there will be ore discharge and stone discharge. In this case, the filling rate of cement raw material milling steel ball shall be checked according to the actual situation of the concentrator. 

Generally, the appropriate filling rate of steel ball is 20% ~ 40% of the volume of cement raw material milling, and the average stacking specific gravity of steel ball is about 4.6t/m3. 

The steel ball ratio of cement raw material milling is unreasonable. The steel ball ratio of cement raw material milling refers to the proportion of large, medium and small diameters of steel balls in cement raw material milling. Each cement raw material milling has a reasonable steel ball ratio range.