Leaching method for alloy material obtained from magnetic copper-nickel concentrate

The invention provides a method for leaching an alloy material obtained from the magnetic-separating copper-nickel ore concentrate, relating to a method for recycling the platinum group metals in the process of producing the metallic nickel, in particular to a method for recycling the platinum group metals from the fine alloy material of the leaching magnetic separation copper-nickel ore concentrate. The method is characterized in that the leaching process adopts two sections: one is leaching at standard atmosphere and the other is leaching with pressurization to obtain the leaching slag with high platinum group metals content and the leaching liquid with high nickel-copper content. The method of the invention processes the alloy material of the leaching magnetic separation copper-nickel ore concentrate by the wet method technique, and adopts the processing technique combining the sulphuric acid leaching at standard atmosphere and the leaching with pressurization to obtain the leaching liquid with high nickel