Title:
METHOD FOR CONTINUOUSLY ENRICHING NICKEL AND COBALT FROM LOW-CONCENTRATION NICKEL-COBALT SOLUTION
Document Type and Number:
WIPO Patent Application WO/2023/131087
Kind Code:
A1
Abstract:
The present invention provides a method for continuously enriching nickel and cobalt from a low-concentration nickel-cobalt solution. The method comprises: step S1, adding an alkaline precipitant to a low-concentration nickel-cobalt solution for precipitation reaction, so as to obtain a crude nickel-cobalt intermediate wet material and a separation liquid; step S2, slurrying part of the crude nickel-cobalt intermediate wet material to obtain a slurried liquid; step S3, subjecting the slurried liquid to acid leaching to obtain a leachate and leached residues; and step S4, enriching and neutralizing the remaining crude nickel-cobalt intermediate wet material with at least part of the leachate to obtain an enriched nickel-cobalt solution, wherein the concentration of Ni2+ ions in the low-concentration nickel-cobalt solution is 1-10 g/L, and the concentration of Co2+ ions is 0.2-10 g/L. According to the present application, the closed conveying of the materials is achieved; the oxidation of divalent cobalt in the materials is avoided; in addition, not only is the consumption of an acid and an alkali during the leaching and neutralization processes reduced, but the equipment scale of subsequent nickel-cobalt purification and extraction is also reduced; the processing process is simple; and the processing cost is low.
Inventors:
ZHANG YANG (CN)
WANG HENGLI (CN)
DONG AIGUO (CN)
LU YEDA (CN)
YIN SHUYAN (CN)
PAN YUANGANG (CN)
DAI JIANGHONG (CN)
WANG HENGLI (CN)
DONG AIGUO (CN)
LU YEDA (CN)
YIN SHUYAN (CN)
PAN YUANGANG (CN)
DAI JIANGHONG (CN)
Application Number:
PCT/CN2022/144261
Publication Date:
July 13, 2023
Filing Date:
December 30, 2022
Export Citation:
Assignee:
CHINA ENFI ENG CORP (CN)
International Classes:
C22B3/06; C22B23/00; C22B3/44
Foreign References:
| CN114427037A | 2022-05-03 | |||
| CN103352119A | 2013-10-16 | |||
| CN109234526A | 2019-01-18 | |||
| CN110541075A | 2019-12-06 | |||
| CN103993175A | 2014-08-20 | |||
| CN111471862A | 2020-07-31 |
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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