Molybdenum Flotation - 911 MetallurgistMar 17, 2017 . Recovery of molybdenum into the rougher concentrate varied between 90 to 95% at a concentrate grade of 2.5 to 3.7% molybdenum. The rougher concentrate can be upgraded to a marketable grade molybdenum concentrate at between 77 to 80% overall molybdenum recovery. Regrinding of the rougher.molybdenum concentrate regrind mill,Copper Flotationprocess plant for recovery of copper and molybdenum concentrates. • tailings management facility. • associated . (28.8 Mt/y at 91.3% availability) subject to ore competency and SAG mill feed size with throughput expected to average .. Isamill (3 MW) in open circuit. • layout allows for second regrind mill (future) if required.