Title:
湿式製錬法によるニッケル酸化鉱石からのニッケルコバルト混合硫化物の製造方法
Document Type and Number:
Japanese Patent JP7095606
Kind Code:
B2
Abstract:
Provided is a wet smelting method whereby the amount of nickel coprecipitated with impurities is reduced and nickel yield can be increased. The present invention provides a method for manufacturing a nickel/cobalt mixed sulfide, the method including: a leaching step S1 for performing sulfuric acid leaching of a nickel oxide ore slurry under high temperature and high pressure and obtaining a leached slurry; a solid/liquid separation step S2 for separating a leaching residue from the leached slurry and obtaining a leachate including an impurity together with nickel and cobalt; a neutralization step S3 for sedimentation-separating a neutralized sediment formed by adjusting the pH of the leachate, and obtaining a neutral final liquid including nickel and cobalt; a dezincification step S4 for separating zinc and other sulfides obtained by treating the neutral final liquid with hydrogen sulfide, and obtaining a dezincified final liquid; and a nickel recovery step S5 for recovering a mixed sulfide including nickel and cobalt obtained by treating the dezincified final liquid with hydrogen sulfide; wherein the Fe(III) concentration of the neutral final liquid is adjusted to 0.18 g/L or less.
Inventors:
Makoto Suginohara
Katsuteru Sato
Katsuteru Sato
Application Number:
JP2019005909A
Publication Date:
July 05, 2022
Filing Date:
January 17, 2019
Export Citation:
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
C22B23/00; C22B3/08; C22B3/22; C22B3/44
Domestic Patent References:
| JP2018059167A | ||||
| JP2018090889A | ||||
| JP2010037626A | ||||
| JP2016194124A |
Foreign References:
| WO2005116279A1 |
Attorney, Agent or Firm:
Norihisa Tsujikawa