Özet:

The copper production usually involves subjecting the sulfudic flotation concentrates to smelting. Recently due to increasing in environmental limitations and impurities in ore formation, hydrometallurgical routes are preferred as an alternative to pyrometallurgical processes. The copper hydrometallurgical investigations have been done since the 1970s. Despite reasonable technical success, the process was not proved economically. Since then the integration of solvent extraction and electrowinning technology has led to renewed interest in this area in the 1990s. Thus, the detailed investigations have been conducted on the complex chalcopyrite ore under atmospheric pressure to elucidate the reaction mechanism, formation of intermediate sulfides and their effects on leach kinetics. In this study, the compilation of the studies including various observations and outcomes, are presented. The general conclusion is that the electrode potential, temperature and concentration ratio of Fe3+/Fe2+ are responsible for the formation of metaldeficient sulfides on mineral surface. These species hinder the dissolution rate by preventing the ion diffusion through the mineral surface. The methods applied to overcome this drawback are also discussed in the present study

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