continuous copper gold ore ball mill
ABB successfully commissions largest gearless mill drive system in ... Jun 30, 2014 ... ABB''s delivery included one gearless mill drive system (GMD) for a 40feet ... dual pinion ringgeared mill drive systems (RMDs) for two 26feet ball mills; ... in the mill drive systems and to ensure continuous operation with maximum ... metric tons of copper and gold ore per day over a 22year operating life.