### Mill Speed

9.3.4 mill speed. during normal operation the mill speed tends to vary with mill charge. according to available literature, the operating speeds of ag mills are much higher than conventional tumbling mills and are in the range of 80–85% of the critical.A 10 mw cement mill, output 270 tonnes per hour a cement mill (or ...ball mills are normally operated at around 75% of critical speed, so a ... chat what is crictal speed of cement mill.