Effects of Ball Milling Conditions on Breakage . Semantic Scholar
of Baban Tsauni (Nigeria) Lead Gold Ore. . The optimum ball milling speed of the ore was found to be 82.9% of the critical mill speed. . Excessive grinding of an ore increases energy costs and also leads to production of very fine . Contrarily when the material load is low, excessive ball to ball contact retard the rate of.