1.1.2 extraction of nickel and cobalt from sulphide ores. sulphide ores were mostly the dashed line indicates a developing process. the valuable minerals in an ore are concentrated by froth flotation of crushed or ground ore and,.,nickel ore processing plant nickel ore concentration,copper- nickel ore flotation process when process copper-sulfide nickel ore, collector and frother will be used in order to better results. a basic principle of copper-sulfide nickel ore process is that it is better to let copper assimilate into nickel ore rather than the opposite. for it is easier to recovery cooper from nickel concentrate.