Copper Nickel Flotation - 911 MetallurgistJun 15, 2017 . The Bureau of Mines investigated the flotation responses of two copper nickel ore samples from the Duluth Complex with the objective of recovering . the vicinity of the South Kawishiwi River in 1955 and later investigated selective sulfatization as a method of extracting the metal values from these ores.selective copper nickel flotation,Sequential Selective Flotation Process Flowsheet - 911 MetallurgistMar 19, 2017 . A selective or sequential flotation flowsheet of two or more products. By utilizing selective flotation, two or more minerals in an ore are separated into individual high grade products. ORE TREATED: The most common of ores treated in this manner are lead zinc, copper-zinc-iron, copper-nickel, but.