Title:
METHOD FOR SMELTING METAL OXIDE ORE
Document Type and Number:
WIPO Patent Application WO/2018/174148
Kind Code:
A1
Abstract:
Provided is a method for smelting a metal oxide ore for obtaining a metal sulfide, wherein the method makes it possible to efficiently recover a fine metal sulfide included in an overflow solution and reduce the recovery cost of metal components when concentrating and separating a metal sulfide using a thickener or other precipitation separation device. The present invention pertains to a method for smelting a metal oxide ore containing nickel and cobalt, wherein the method has: a step S1 for performing pressurized acid leaching of a metal oxide ore and obtaining an acidic solution of nickel and cobalt; a step S2 for neutralizing the acidic solution; a step S3 for carrying out a sulfurization process by adding a sulfurizing agent to a neutralized final solution, and obtaining a slurry of a mixed sulfide of nickel and cobalt; a step S4 for precipitating and separating the mixed sulfide from the slurry of the mixed sulfide; and a step S5 for microfiltering an overflow solution from which the mixed sulfide has been separated, and obtaining microparticles and a filtrate of the mixed sulfide remaining in the overflow solution. Furthermore, the microparticles of the mixed sulfide obtained using microfiltration are added to the neutralized final solution to be sulfurized.
Inventors:
HARA KENJI (JP)
IWAMOTO TOMIO (JP)
IWAMOTO TOMIO (JP)
Application Number:
PCT/JP2018/011357
Publication Date:
September 27, 2018
Filing Date:
March 22, 2018
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B23/00; B01D61/14; B01D63/02; B01J45/00; B01J49/50; C22B3/06; C22B3/08; C22B3/26; C22B3/42; C22B3/44; C22B59/00
Domestic Patent References:
| WO2012098924A1 | 2012-07-26 |
Foreign References:
| JP2017043824A | 2017-03-02 | |||
| JP2010031302A | 2010-02-12 | |||
| JP2013043996A | 2013-03-04 |
Other References:
See also references of EP 3604569A4
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (JP)
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