Title:
METHOD FOR EXTRACTING NICKEL FROM HIGH MATTE NICKEL LEACHING RESIDUE
Document Type and Number:
WIPO Patent Application WO/2023/005428
Kind Code:
A1
Abstract:
Disclosed in the present invention is a method for extracting nickel from a high matte nickel leaching residue. The method comprises: firstly, adding a crushed material of a high matte nickel leaching residue to an organic solvent in which sulfur is dissolved, heating same for reaction, and carrying out solid-liquid separation to obtain a first filtrate and a first filter residue; adding the first filter residue to a copper sulfate solution, heating same for reaction, and carrying out solid-liquid separation to obtain a second filtrate and a second filter residue; and evaporating, condensing and concentrating the second filtrate, and filtering same to obtain copper sulfate crystals and a nickel-containing filtrate. In the present invention, by using the oxidizing property of elemental sulfur in the organic solvent, Cu2S, Ni3S2, CuFeS2, a nickel-iron-copper alloy, etc. in the high matte nickel leaching residue are oxidized into CuS, NiS and FeS; in addition, in the presence of the organic solvent, elemental sulfur in the high matte nickel leaching residue is dissolved in the solvent; NiS and FeS are then replaced with the copper sulfate solution into more insoluble CuS; and nickel ions and ferrous ions enter the solution, such that the copper content in the leaching residue is further improved. Throughout the whole reaction, only a small amount of sulfur and copper sulfate are consumed, and the organic solvent can be recycled.
Inventors:
YU HAIJUN (CN)
XIE YINGHAO (CN)
LI AIXIA (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
XIE YINGHAO (CN)
LI AIXIA (CN)
ZHANG XUEMEI (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2022/097174
Publication Date:
February 02, 2023
Filing Date:
June 06, 2022
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
International Classes:
C22B3/38; C22B7/00; C22B15/00; C22B23/00
Foreign References:
| CN113755698A | 2021-12-07 | |||
| CN101381810A | 2009-03-11 | |||
| CN107630146A | 2018-01-26 | |||
| CN110342590A | 2019-10-18 | |||
| CN212127522U | 2020-12-11 | |||
| CN1544664A | 2004-11-10 | |||
| KR101191042B1 | 2012-10-15 | |||
| JP2018150183A | 2018-09-27 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
Download PDF: