Title:
HYDROMETALLURGICAL METHOD FOR NICKEL OXIDE ORE
Document Type and Number:
WIPO Patent Application WO/2018/079101
Kind Code:
A1
Abstract:
Provided is a hydrometallurgical method for a nickel oxide ore in which, even in the case where a nickel oxide ore having a high carbon content is to be treated, iron can be efficiently inhibited from leaching, the amount of sulfuric acid used and the amount of a neutralizer used can be reduced, and the energy cost can be effectively reduced. This hydrometallurgical method for a nickel oxide ore is characterized by comprising a leaching step for preparing a slurry of a nickel oxide ore having a carbon quality of 0.20 mass% or more, adding sulfuric acid to the ore slurry in a reaction container, and subjecting the resultant slurry to a leaching treatment at high temperature and high pressure, to obtain a leached liquid containing nickel and cobalt, wherein, in the leaching step, the redox potential (Ag/AgCl based) in the leaching treatment is controlled to 520-560 mV by only supplying high-pressure oxygen.
Inventors:
TANAKA MASAHIRO (JP)
SAITO DAISUKE (JP)
OOISHI TAKAO (JP)
KITAZAKI TOORU (JP)
SAITO DAISUKE (JP)
OOISHI TAKAO (JP)
KITAZAKI TOORU (JP)
Application Number:
PCT/JP2017/032705
Publication Date:
May 03, 2018
Filing Date:
September 11, 2017
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B23/00; C22B3/08
Foreign References:
| JP2014205901A | 2014-10-30 | |||
| JP2015227510A | 2015-12-17 | |||
| JP2009197298A | 2009-09-03 | |||
| JP2009197298A | 2009-09-03 | |||
| JP2014205901A | 2014-10-30 |
Other References:
See also references of EP 3533888A4
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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