An electrochemical and chemcial study of the leaching of copper sulfides in acidified ferrous sulfate solutions sparged with an O_2 - SO_2 mixture

摘要

Electrochemical and chemical leaching tests were carried out on chalcocite, covellite and chalcopyrite in acidified iron sulfate solutions sparged with a mixture of O_2 - SO_2. The gas mixture catalyzed the ferrous to ferric oxidation reaction in situ and, therefore, increased the redox potential and oxidizing strength of the solution.