Title:
METHOD FOR EXTRACTING VALUABLE METAL FROM LOW-MATTE NICKEL CONVERTER SLAG
Document Type and Number:
WIPO Patent Application WO/2023/000845
Kind Code:
A1
Abstract:
Disclosed in the present invention is a method for extracting valuable metal from low-matte nickel converter slag. The method comprises: mixing low-matte nickel converter slag and quicklime then calcinating, obtaining a calcinated material; grinding and magnetically separating the calcinated material, obtaining silicate and iron-rich slag; adding a strong alkali solution to the iron-rich slag to perform leaching processing, and performing solid-liquid separation, obtaining a filtrate and a residue; mixing the residue with an acid solution, performing oxygen pressure acid leaching, and performing solid-liquid separation, obtaining a leachate and iron oxide; introducing hydrogen sulfide gas into the leachate, adjusting the pH, and performing solid-liquid separation, obtaining a copper sulfide precipitate and a nickel-cobalt-containing filtrate. In the present invention, first, removing silicon dioxide is removed by means of calcination to prepare silicate, then iron oxide is prepared by means of acid leaching, and finally metal separation is performed on the leachate, causing various components of the converter slag to be effectively utilized. The process flow of the present invention is short and effectively utilizes each component of the low-matte nickel converter slag, waste is turned into valuable material, and the loss of valuable metal elements is reduced.
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/CN2022/097181
Publication Date:
January 26, 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:
C22B7/04; C01G49/06; C04B7/147; C04B7/38; C22B1/02; C22B3/38; C22B7/00; C22B15/00; C22B23/00; C22B23/02
Foreign References:
| CN113621819A | 2021-11-09 | |||
| CN107674984A | 2018-02-09 | |||
| CN111100992A | 2020-05-05 | |||
| CN110777257A | 2020-02-11 | |||
| CN111118294A | 2020-05-08 | |||
| CA2363969A1 | 2003-05-26 | |||
| US4468302A | 1984-08-28 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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