| 摘要 |
A novel hydrometallurgical process for the recovery of copper, and optionally iron, from sulfide copper concentrates containing common copper sulfides such as chalcopyrite, bornite and chalcocite using electrowinning cells wherein the anolyte and the catholyte are separated by a solution-impermeable cation exchange membrane. The process for the recovery of copper utilizing electrowinning cells comprises leaching copper concentrate in first and second stages, the leaching in the first stage being done with a partially reduced leach liquor obtained from the second stage; separating the concentrate obtained from the first stage in a solid-liquid separator, the partially leached solids being directed to the second leaching stage, the liquid from the separator being directed to the catholyte compartment of an electrowinning cell; leaching the solids in the second leaching stage with regenerated leaching liquid obtained from the anolyte compartment of the electrowinning cell, the anolyte and catholyte compartments being separated by a membrane which is impermeable to copper chloride and iron chloride complexes but is permeable to hydrogen ions; separating the concentrate obtained from the second stage in a second solid-liquid separator, and filtering and washing the solids residue from the separator.
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