| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a wet refining method for a copper raw material containing a copper sulfide mineral such as chalcopyrite, which leaches copper out of the raw material at a high leach rate while suppressing oxidation of sulfur, recovers monovalent copper through electrolysis process and recovers a concomitant valuable metal while minimizing production of wastes such as leaching residue. <P>SOLUTION: The refining method comprises a chlorine leaching step for leaching the copper raw material by using chlorine to produce a leachate containing copper ions, a copper ion reduction step for obtaining a reduction product liquid containing the cuprous ion by adding a reductant to the leachate, a solvent extraction step for subjecting the reduction product liquid to solvent extraction to obtain a stripping product liquid containing the copper and a raffinate, a copper electrowinning step for subjecting the stripping product liquid to electrowinning to obtain electrodeposited copper, a solution purification step of subjecting the raffinate obtained in the solvent extraction step to solution purification to obtain a purified solution and an iron recovery step of subjecting the purified solution to iron recovery to obtain an iron-containing solid matter. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
