Ball Mill Operating Speed
At what speed will the mill have to be run if the 100 mm balls are replaced by 50 mm balls, all the other conditions remaining the same? calculations: the critical speed of ball mill is given by, where r = radius of ball mill; r = radius of ball. for r = mm and r = 50 mm, n c = 30.7 rpm. but the mill is operated at a speed of 15.Aug 02, based on his work, this formula can be derived for ball diameter sizing and selection: dm = 6 (log dk) * d^0.5 where dm = the diameter of the single-sized balls in mm.d = the diameter of the largest chunks of ore in the mill feed in.