Title:
METHOD FOR REDUCING ACID AND IRON CONCENTRATIONS IN SECONDARY COPPER SULFIDE ORE BIO-HEAP LEACHING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/016522
Kind Code:
A1
Abstract:
The present invention relates to the field of non-ferrous metal metallurgy, and in particular, to a method for reducing acid and iron concentrations in a secondary copper sulfide ore bio-heap leaching system. The iron concentration in a copper heap leaching qualified solution or raffinate is reduced using a hematite iron removal process, sulfuric acid in the solution is transferred from an aqueous phase to an organic phase by using an organic extractant capable of selectively extracting sulfuric acid without extracting metal ions such as copper and ferrous irons, a loaded organic phase is back-extracted with water to obtain dilute sulfuric acid having a relatively high purity, and the solution of which the acid and iron concentrations are reduced enters a copper extraction-electrodeposition system to produce cathode copper or returns to the heap leaching system.
Inventors:
ZHANG LUOHU (CN)
WANG ZHENTANG (CN)
ZHONG CHUANGANG (CN)
XUE JIEHAO (CN)
ZHU YOUWU (CN)
SHENG RUGUO (CN)
WANG ZHENTANG (CN)
ZHONG CHUANGANG (CN)
XUE JIEHAO (CN)
ZHU YOUWU (CN)
SHENG RUGUO (CN)
Application Number:
PCT/CN2022/130712
Publication Date:
January 25, 2024
Filing Date:
November 08, 2022
Export Citation:
Assignee:
WANBAO MINING LTD (CN)
International Classes:
C22B3/18; C22B3/28; C22B15/00
Domestic Patent References:
| WO2000023629A1 | 2000-04-27 |
Foreign References:
| CN115161476A | 2022-10-11 | |||
| CN104232924A | 2014-12-24 | |||
| US5670035A | 1997-09-23 | |||
| US4440734A | 1984-04-03 | |||
| US5582737A | 1996-12-10 |
Attorney, Agent or Firm:
CHINA NORTH INDUSTRIES GROUP CORPORATION PATENT CENTER (CN)
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