| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method of recovering electrolytic iron through a wet copper refining method comprising a step of subjecting a copper raw material containing a copper sulfide mineral to chlorine leaching, a step of reducing a leachate, a step of obtaining an aqueous ferric chloride solution by subjecting the reduced leachate to solvent extraction and separating and recovering copper, and a step of electrowinning iron from the aqueous ferric chloride solution, wherein an electrodeposit with a smooth surface can be obtained in the step of electrowinning iron from the aqueous ferric chloride solution. <P>SOLUTION: In the step of electrowinning iron from the aqueous ferric chloride solution, a sulfurizing agent is added to the aqueous ferric chloride solution to control its oxidation-reduction potential (Ag/AgCl electrode as reference) to from -400 to -50 mV, and a pH adjuster is added to adjust its pH to 3.0-4.5 to precipitate and separate lead contained in the aqueous ferric chloride solution as a sulfide before performing the electrowinning of iron. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
