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Title:
DEZINCIFICATION SYSTEM FOR AQUEOUS NICKEL SULFATE SOLUTIONS, AND METHOD FOR SAME
Document Type and Number:
WIPO Patent Application WO/2019/102652
Kind Code:
A1
Abstract:
Provided is a dezincification system for aqueous nickel sulfate solutions, which is capable of stably maintaining the zinc content in a nickel/cobalt mixed sulfide low. This dezincification system for aqueous nickel sulfate solutions is provided with: a reaction container (50) in which an aqueous nickel sulfate solution containing cobalt and zinc is retained; a hydrogen sulfide supply means (40) which supplies a H2S gas to the reaction container; a zinc concentration sensing means (10) and a nickel concentration sensing means (20), which respectively sense the zinc concentration (Z) and the nickel concentration (N) in the aqueous nickel sulfate solution; and a control unit (90) which causes the hydrogen sulfide supply means (40) to adjust the amount (P) of the H2S gas to be supplied to the reaction container. The control unit (90) is also provided with a management index calculation means (91), which calculates the ratio of the zinc concentration (Z) to the nickel concentration (N) in the aqueous nickel sulfate solution as a management index (W = Z/N), and controls so that the management index (W) calculated by the management index calculation means (91) is maintained between management reference values (Q1 ≤ W ≤ Q2).

Inventors:
SAITO DAISUKE (JP)
OISHI TAKAO (JP)
TANAKA MASAHIRO (JP)
KITAZAKI TORU (JP)
Application Number:
JP2018/029091
Publication Date:
May 31, 2019
Filing Date:
August 02, 2018
Export Citation:
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Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B23/00; C22B3/08; C22B3/44
Foreign References:
JP2013185179A2013-09-19
JP2002121624A2002-04-26
JP2003313617A2003-11-06
JP2013185178A2013-09-19
JP2017226237A2017-12-28
JP2013185178A2013-09-19
Attorney, Agent or Firm:
KOIKE Akira et al. (JP)
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