| 摘要 |
A process for separating nickel from copper contained in solid particles of ground sulphidic matte or alloy comprises subjecting a slurry of the particles in an acidic chloride solution to a leach treatment, preferably with additional chlorine, in an autoclave at an above atmospheric pressure and at a temperature greater than 110 DEG C, and a redox potential which favours the dissolution of nickel over copper, to form a nickel enriched leach solution including a nickel impoverished solid residue containing copper sulphide, adding fresh unleached solid particles to the leach solution (either at atmospheric pressure or at above atmospheric pressure) to precipitate dissolved copper from the solution, separating the solid residue from the solution and treating them respectively to recover copper and nickel. Cobalt may also be recovered from the solution, and precious metals may also be recovered from the residue. |
