Title:
METHOD FOR REMOVING SULFIDIZING AGENT
Document Type and Number:
WIPO Patent Application WO/2017/110572
Kind Code:
A1
Abstract:
Provided is a method for removing a sulfidizing agent such as hydrogen sulfide or the like that is dissolved in a sulfidized liquid generated in a wet process for smelting a nickel oxide mineral ore, the method enabling the usage quantities of chemical agents such as sulfuric acid and neutralizing agents to be reduced while a dissolved sulfidizing agent is effectively removed. This method for removing a sulfidizing agent includes: subjecting a nickel oxide mineral ore to acid leaching at high temperature and high pressure using sulfuric acid so as to obtain a leachate containing nickel and cobalt and a leaching residue; subjecting the leachate to a sulfidizing treatment by means of a sulfidizing agent so as to generate a sulfide containing nickel and cobalt and a sulfidized liquid; and removing the sulfidizing agent dissolved in the separated sulfidized liquid. A washed leaching residue, which is obtained by washing the leaching residue, and a sulfuric acid solution are added to the sulfidized liquid so as to solidify and recover sulfidizing agent contained in the sulfidized liquid as sulfur.
Inventors:
AMANO TORU (JP)
SHIBAYAMA KEISUKE (JP)
SHIBAYAMA KEISUKE (JP)
Application Number:
PCT/JP2016/086972
Publication Date:
June 29, 2017
Filing Date:
December 13, 2016
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B23/00; C22B3/08; C22B3/44
Foreign References:
| JP2015127053A | 2015-07-09 | |||
| JP2004089915A | 2004-03-25 | |||
| JP2014177391A | 2014-09-25 | |||
| JP2015206068A | 2015-11-19 | |||
| JP2004089915A | 2004-03-25 |
Other References:
See also references of EP 3395968A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
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