method for processing copper sulphide ores based on nickel and precious metals.

摘要

The invention relates to a method for processing sulfide ores containing precious metals, such as copper ores containing nickel. According to the method, the ore or concentrate (1) containing the precious metals is leached (2), and the iron contained in the solution is neutralized in oxidizing conditions by means of a ferrous recirculation solution (6) recirculated to the leach. The solution (8) from the leaching step and at least part of the solution residue is conducted to a conversion step (5), where iron bearing sulfide (9) is fed for turning the copper contained in the conversion step to copper sulfide concentrate (10) containing the precious metals. The solution (6) obtained from the conversion step is partly recirculated to the preceding leaching step (2) and partly conducted to the further treatment (11) of the components contained in the solution.