Jun 10, 2021 The impact of more data-empowered decision making was seen at Freeport-McMoRans copper mine in Arizona, where AI modelling of grinding circuit operations has helped to improve mill productivity by an estimated 20 million lb. per year an increase that has allowed the company to avoid most of planned $200 million capital expansion. copper mine crusher capacity Run-of-mine ore will be crushed in a gyratory crusher. The mill flow sheet selected for Mirador will be a conventional copper-gold porphyry flowsheet, with relatively coarse primary semiautogenous and ball mill grinding to about 150 m followed by copper rougher flotation, concentrate regrind to 30 m, and cleaner flotation and dewatering