Apparatus and method for copper extraction by in-situ...

Details Apparatus and method for copper extraction by in-situ... Apparatus and method for copper extraction by in-situ...

C - Chemistry, Metallurgy

25

C

C25C 1/12 (2006.01) C22B 3/02 (2006.01) C22B 3/06 (2006.01) C22B 15/00 (2006.01) C25C 7/00 (2006.01)

Patent

CA 2258607

Copper is extracted from a heap of low-grade ore by transforming the heap into an electrolytic cell, and imposing a voltage thereon. Anodic conditions of redox and pH cause the sulphide to break down, and the copper to pass into solution. The copper can be recovered elsewhere if the electrolyte is drawn off, or in-situ if allowed to plate onto the cathode. Electrodes are formed as grids of conductors, or as layers of e.g. graphite.

L'invention porte sur un procédé d'extraction du cuivre d'un tas de minerai pauvre consistant à transformer ledit tas en pile électrolytique en lui appliquant une tension. Les conditions de redox et de pH régnant à l'anode entraînent la rupture du sulfure et le passage du cuivre en solution. Le cuivre peut être récupéré en un autre lieu après avoir été extrait ou in situ si on le laisse s'accumuler sur la cathode. Les électrodes peuvent consister en grilles de conducteurs ou en en couches, par exemple de graphite.

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