MODULE #5 FUNCTIONAL PERFOMANCE OF BALL MILLINGIf a ball mill contained only coarse particles then 100% of the mill grinding volume and power draw would be applied to the grinding of coarse particles In reality the mill always contains fines these fines are present in the ball mill feed and are produced as the particles pass through the mill For example when 60% of the solids in a ball mill is coarse then the coarse solids inventory