ball mill in ore making machine - boulangerie .
Ball Mill - Ore Dressing Machine - China Largest Mining Machinery . Ball consumption varies with the fineness of the product hardness of the ore quality of ball and whether a mill is run in closed or open circuit. The ball consumption for mills delivering a coarse product all passing 8-mesh- and containing 10 to 20 per cent. below 200-mesh the mill being run in open circuit is about ½ lb. per ...