Module2 Rod and Ball Mill Power Draw [PDF Document]
Calculate the power draw of the ball mill (at the pinion), Pbm: Pbm = Tb x kwb(kw) 1. These calculations are for overflow ball mills. However, full grate discharge mills* draw approximately 15% more power on average than overflow mills with the same internal length. For dry grinding, grate overflow ball mills, the power draw isapproximately 8 % ...