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Patent Searching and Data


Title:
FREE ACID-REMOVING EQUIPMENT, FREE ACID-REMOVING METHOD, AND METHOD FOR MANUFACTURING MIXED NICKEL AND COBALT SULFIDE
Document Type and Number:
WIPO Patent Application WO/2016/194709
Kind Code:
A1
Abstract:
Provided is a method, in preliminary neutralization of leach slurry generated in a hydrometallurgical process for nickel oxide ore, that is capable of promoting precipitation of iron contained in said leach slurry and limiting increases in turbidity of the overflow liquid obtained in solid-liquid separation of the leach slurry. This free acid-removing method for performing neutralization by adding a neutralizing agent to leach slurry obtained by high pressure acid leaching of nickel oxide ore and removing free acid contained in the leach slurry: uses at least two reaction tanks; adds the neutralizing agent divided between the two or more reaction tanks in multiple stages; and performs neutralization of the leach slurry continuously.

Inventors:
GODA YUKIHIRO (JP)
OOISHI TAKAO (JP)
Application Number:
JP2016/065334
Publication Date:
December 08, 2016
Filing Date:
May 24, 2016
Export Citation:
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Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B23/00; C22B3/44
Domestic Patent References:
WO2014136487A12014-09-12
WO2014027503A12014-02-20
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
Right wood Masayuki (JP)
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