Title:
METHOD FOR SEPARATING NICKEL AND IRON FROM NICKEL-IRON ALLOY AND USE
Document Type and Number:
WIPO Patent Application WO/2022/161087
Kind Code:
A1
Abstract:
The present invention belongs to the field of hydrometallurgy. Disclosed are a method for separating nickel and iron from a nickel-iron alloy and use. The method comprises the following steps: dissolving a nickel-iron alloy in an acid solution, filtering, and collecting the filtrate to obtain an acidic nickel-iron solution; adjusting the pH of the acidic nickel-iron solution, heating, stirring, adding iron powder, and continuing heating and stirring to obtain sponge nickel and nickel precipitation mother liquor; subjecting the nickel precipitation mother liquor to oxidation and iron precipitation to obtain iron hydroxide slag and an iron precipitation mother liquor; and dissolving sponge nickel in sulfuric acid, filtering, collecting the filtrate, raising the temperature, and adjusting the pH, so as to obtain a nickel sulfate solution. In the present invention, after the nickel-iron alloy is dissolved using the acid solution, nickel in the solution is displaced by iron powder to obtain the sponge nickel, the nickel precipitation mother liquor is oxidized to produce iron hydroxide, the nickel content is less than 0.4%, the iron precipitation mother liquor can be returned to a leaching section, and the sponge nickel can be subjected to acid dissolution, impurity removal, and evaporative crystallization to obtain a battery-grade nickel sulphate product.
Inventors:
HE FANG (CN)
DENG HAOZHEN (CN)
QIAO YANCHAO (CN)
CHEN RUOKUI (CN)
RUAN DINGSHAN (CN)
CHEN ZHIXIN (CN)
LI CHANGDONG (CN)
DENG HAOZHEN (CN)
QIAO YANCHAO (CN)
CHEN RUOKUI (CN)
RUAN DINGSHAN (CN)
CHEN ZHIXIN (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2021/142352
Publication Date:
August 04, 2022
Filing Date:
December 29, 2021
Export Citation:
Assignee:
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)
International Classes:
C22B3/46; C01G49/02; C01G53/10; C22B23/00
Foreign References:
| CN112941314A | 2021-06-11 | |||
| CN103966446A | 2014-08-06 | |||
| CN107287429A | 2017-10-24 | |||
| CN103290222A | 2013-09-11 | |||
| CN105271632A | 2016-01-27 | |||
| KR20140043001A | 2014-04-08 | |||
| AU2008241353A1 | 2008-10-30 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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