The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 2020
Filed:
Sep. 12, 2016
Jx Nippon Mining & Metals Corporation, Tokyo, JP;
Katsuyuki Sato, Tokyo, JP;
Akira Miura, Hitachi, JP;
JX NIPPON MINING & METALS CORPORATION, Tokyo, JP;
Abstract
The present invention provides a method for efficiently leaching copper from copper sulfide ore by separating and recovering iodine, and iron(III) ions to be used are regenerated by a heap of stacked ore in the method for leaching copper from copper sulfide using a sulfuric acid solution containing iodide ions and iron(III) ions as a leaching solution. The present invention relates to a method for leaching copper from copper sulfide, comprising the following steps: a copper leaching step for leaching copper from copper sulfide ore using a sulfuric acid solution containing iodide ions and iron(III) ions as a leaching solution to yield a first solution; an iodine separation treatment step for separating iodine in the first solution to yield a second solution having a lowered concentration of iodine therein; and an iron oxidation step for oxidizing the second solution to yield a third solution, leaching the copper sulfide ore or another copper sulfide using the third solution and an aqueous solution containing iodine, wherein the iron oxidation step comprises irrigating the solution after iodine separation treatment onto stacked ore, thereby oxidizing iron(II) ions existing in the solution after iodine treatment and generated by copper leaching.