### Ball Mill Citrcal Speed Of Formula

12 the power drawn for grinding mill can be calculated from the empirical formula hp = 1.341 w. (d0 c (0.-0..) -0.1( 2 00) - 4 where h = required horsepower w6 = weight of the ball charge in tons 0 = inside mill diameter inft ci = percentage of critical speed at which the mill is operated vi= percentage of mill occupied by balls a.