Title:
RECOVERY METHOD AND USE OF CRUDE FERRO-NICKEL ALLOY
Document Type and Number:
WIPO Patent Application WO/2022/160493
Kind Code:
A1
Abstract:
The present invention belongs to the field of nonferrous metallurgy. Disclosed are a recovery method and the use of a crude ferro-nickel alloy. The recovery method comprises the following steps: crushing and ball-milling crude ferro-nickel alloy, adding ammonium salt and ammonia water, and mixing and stirring same, heating and pressurizing for an ammonia leaching reaction to obtain a slurry, and filtering same to obtain a nickel complex leaching solution and iron slag; adding a reducing agent into the iron slag, and carrying out reduction roasting to obtain iron ore concentrate; and adding an alkaline buffer solution into the nickel complex leaching solution to adjust the pH value for an alkaline reaction, and heating for ammonia distillation to obtain nickel sulfate. The crude ferro-nickel alloy of the present invention is subjected to crushing and ore grinding, pressurized ammonia leaching, filtering and evaporative crystallization, a sulfuric acid system is used in pressurized ammonia leaching, and after ammonia leaching and ammonia distillation, high-value class I nickel sulfate hexahydrate (the purity being 99.7%) and high-grade marketable refined iron powder (the recovery rate being greater than 99.99%, and the purity being greater than 98%) can be directly obtained.
Inventors:
DENG HAOZHEN (CN)
SHEN ZHIXIN (CN)
CHEN RUOKUI (CN)
RUAN DINGSHAN (CN)
QIAO YANCHAO (CN)
HE FANG (CN)
LI CHANGDONG (CN)
SHEN ZHIXIN (CN)
CHEN RUOKUI (CN)
RUAN DINGSHAN (CN)
QIAO YANCHAO (CN)
HE FANG (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2021/091665
Publication Date:
August 04, 2022
Filing Date:
April 30, 2021
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:
C21B13/00; C22B3/14; C22B23/00
Foreign References:
| CN106119573A | 2016-11-16 | |||
| CN102424431A | 2012-04-25 | |||
| CN106086467A | 2016-11-09 | |||
| CN101423897A | 2009-05-06 | |||
| CN102080159A | 2011-06-01 | |||
| CN102345019A | 2012-02-08 | |||
| CN102115816A | 2011-07-06 | |||
| EP0182931B1 | 1990-02-28 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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