cement mill critical speed
cement plant ball mills critical speed formulae. Most ball mills operate most efficiently between 65 and 75 of their critical speed. Photo of a 10 Ft diameter by 32 Ft long ball mill in a Cement Plant.Coal GrindingCement Plant OptimizationBall mill is a cylinder rotating at about 70 80 of critical speed on two trunnions in white metal bearings or slide shoe bearings for large capacity