Title:
NEUTRALIZATION METHOD AND NICKEL OXIDE ORE HYDROMETALLURGICAL METHOD
Document Type and Number:
WIPO Patent Application WO/2017/141693
Kind Code:
A1
Abstract:
Provided is a method capable of improving the settleability of neutralization precipitate, generated by neutralization, and of reducing floating particles in the supernatant after solid-liquid separation, and also capable of reducing filtration load. This neutralization method is a neutralization method for generating a neutralization slurry by adding a calcium-containing neutralizing agent to a sulfuric acid acidified solution to adjust the pH, and separating the neutralization precipitate from the post-neutralization liquid. Iron oxide in an amount corresponding to 200 weight%-500 weight% of the amount of neutralization precipitate generated is added to the sulfuric acid-acidified solution that is being treated. The acidic solution is the leachate obtained by performing leaching using sulfuric acid on nickel oxide ore in a nickel oxide ore hydrometallurical method. For the iron oxide, the leaching residue generated by said leaching can be used.
Inventors:
NAKAGAWA HIDEKAZU (JP)
YAMAGUCHI YOUHEI (JP)
YAMAGUCHI YOUHEI (JP)
Application Number:
PCT/JP2017/003397
Publication Date:
August 24, 2017
Filing Date:
January 31, 2017
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B23/00; C22B3/44
Foreign References:
| JP2004225120A | 2004-08-12 | |||
| JP2004089918A | 2004-03-25 | |||
| JPH02102787A | 1990-04-16 |
Other References:
See also references of EP 3418405A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
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