Leaching method for complicated cupric sulfide aurin ore

Abstract

The present invention relates to wet metallurgical technology, and is especially leaching process of complicated cupric sulfide aurin ore. The process includes stirring leaching ore slurry under normal pressure oxidizing condition, extraction, cyanidation-zinc powder displacement to recover Au, Ag and Cu, and floating to enrich and hot filtering to recover sulfur. In the stirring leaching step, one or several of ferric nitrate, ferric sulfate, ferric chloride, vanadium oxide, manganese oxide and titanium oxide as catalyst to alter the surface activity of the cupric sulfide is added in the amount of 0.05-1.0 mol / L. The present invention has the features of normal pressure and normal pressure leaching, easy control, low production cost, environment friendship, etc.

Description

1. Technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for leaching complex copper-gold sulfide concentrates. 2. Background technology [0002] Industry insiders believe that complex copper-gold sulfide concentrates refer to complex minerals containing chalcopyrite, pyrite, copper blue, sphalerite, chalcocite, arsenopyrite, pentlandite and other components in the mineral composition. Complex copper-gold sulfide concentrates have the characteristics of wide distribution, large reserves, and difficult leaching. At present, the leaching methods of complex copper-gold sulfide concentrates in the research stage are relatively concentrated on wet oxidation technology, mainly including: the published "high temperature and high pressure full oxidation technology", "medium temperature and low pressure leaching technology", "low temperature and low pressure leaching technology ", "Bacterial Oxidation Leaching Technology", ...

AI Technical Summary

Problems solved by technology

Problems in the disclosed technology: high equipment requirements, large investment costs, difficult control of technical conditions, inconvenient operation, high risk, difficult recovery of precious metals, sulfur cannot be recovered, sulfuric acid produced needs to be neutralized, large amount of slag, high cost , it is not easy to realize industrialization, some technical schemes add chlorine salt with high concentration, which will seriously corrode the equipment, some technical schemes have too high oxidant regeneration cost, and the leachate is difficult to handle, and some technical schemes require fine grinding of ore, which cannot handle arsenic Copper sulfide concentrate, long leaching time, high power consumption, etc.

The semi-disclosed technology only discloses the use of concentrated sulfuric acid and chlorine salt as leaching reagents and the addition of catalysts, but does not disclose the type and amount of catalysts added, which can increase the copper leaching rate, but there are still serious corrosion of equipment, high oxygen consumption, The leaching solution has high concentrations of sulfuric acid and chloride salts and it is difficult to recover copper, which is only in the laboratory research stage