Hydrometallurgical recovery of copper nickel or zinc from sulphide ores by oxidation in ammoniacal chloride or nitrate solutions

摘要

A process for the ammoniacal leaching of sulphide ores or concentrates to recover metals therefrom to form soluble complex, amines, the process including the step of treating the materials suspended in ammoniacal solutions with air or oxygen at or near atmospheric pressure and at or near ordinary atmospheric temperatures.