### paper # 25 - copper mountain overview on the grinding

The 24’ x 39.5’ Ball Mill The Copper Mountain ball mills are 7315 mm [24 feet] in diameter and 12040 mm [39.5 feet] ... Whenever the ore feed to the ball mill is recovered again, then the ball mill ... overall grinding efficiency. CONCLUSIONS Copper Mountain has a conventional grinding circuit with one SAG and two ball mills, all driven