Title:
DEZINCIFICATION PLANT, METHOD FOR OPERATING DEZINCIFICATION PLANT, AND HYDROMETALLURGICAL METHOD FOR NICKEL OXIDE ORE
Document Type and Number:
WIPO Patent Application WO/2013/133172
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a hydrometallurgical method for nickel oxide ore, in which the plant can be smoothly started after completion of a periodic inspection because zinc sulfide separation imposes no load on the filter cloth and it is possible to reduce the amount of zinc remaining in a mother liquor (dezinced liquid) for nickel recovery to 1 mg/L or less. In the invention, after completion of a periodic inspection, the plant is started up in the following manner. In the beginning of the start-up, the neutralized liquid is not sulfided, and a switching valve (39) in feed piping (34) is switched so that the neutralized liquid is circulated to a dezincification tank (31) through circulatory piping (38). When the flow rate and/or temperature of the neutralized liquid being circulating has reached a given value or higher, the neutralized liquid is sulfided in the dezincification tank to yield a mother liquor for nickel recovery that contains zinc sulfide. The switching valve (39) is switched to transfer the zinc sulfide-containing mother liquor for nickel recovery to a filter device (33) through transfer piping (37).
Inventors:
MITSUI HIROYUKI (JP)
NAKAI OSAMU (JP)
MATSUBARA SATOSHI (JP)
NAKAI OSAMU (JP)
MATSUBARA SATOSHI (JP)
Application Number:
PCT/JP2013/055706
Publication Date:
September 12, 2013
Filing Date:
March 01, 2013
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
MITSUI HIROYUKI (JP)
NAKAI OSAMU (JP)
MATSUBARA SATOSHI (JP)
MITSUI HIROYUKI (JP)
NAKAI OSAMU (JP)
MATSUBARA SATOSHI (JP)
International Classes:
C22B23/00; C22B3/04; C22B3/44; C22B9/02
Domestic Patent References:
| WO2011129395A1 | 2011-10-20 |
Foreign References:
| JP2010037626A | 2010-02-18 | |||
| JP2010095788A | 2010-04-30 | |||
| JPH06116660A | 1994-04-26 | |||
| JP2005350766A | 2005-12-22 | |||
| JP2010037626A | 2010-02-18 |
Other References:
See also references of EP 2824203A4
Attorney, Agent or Firm:
KOIKE, Akira et al. (JP)
Akira Koike (JP)
Akira Koike (JP)
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Claims:
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