# Capacity Selection Procedure Of Ball Mill

Jan 07 2015 Raw mills usually operate at 72 74 critical speed and cement mills at 74 76 3 2 Calculation of the Critical Mill Speed G weight of a grinding ball in kg w Angular velocity of the mill tube in radial second w = 2 3 14 (n 60) Di inside mill diameter in meter (effective mill diameter) n Revolution per minute in rpm.