### ball mill critical speed - 911 metallurgist

Jun 19, 2015 · C.S. = 76.63 / 11^0.5 = 23.1 rpm. Ball and SAG Mills are driven in practice at a speed corresponding to 60-81% of the critical speed, the choice of speed being influenced by economical considerations. Within that range the power is nearly proportional to the speed. Mill rotating speed impacts grinding rates. A great little paper about this is ” Effect of Fraction of Mill Critical Speed on …