Title:
WET SMELTING METHOD FOR NICKEL OXIDE ORE
Document Type and Number:
WIPO Patent Application WO/2016/136087
Kind Code:
A1
Abstract:
A wet smelting method for nickel oxide ores from which nickel, cobalt, etc. are recovered is provided with which it is possible to reduce the consumption of an acid in leaching, such as sulfuric acid, and to recover valuable metals such as nickel and cobalt at a high efficiency.
The method according to the present invention comprises: step (A) in which nickel oxide ores as a raw material are separated into a limonite-type ore having a low magnesium content and a saprolite-type ore having a high magnesium content; step (B) in which the saprolite-type ore is subjected to normal-pressure leaching under given standardized leaching conditions using the pressure leachate obtained by pressure leaching in step (C); and step (C) in which the limonite-type ore obtained in step (A) is mixed with the normal-pressure leaching residue obtained in step (B) and the mixture is reacted with sulfuric acid in an acidic atmosphere having a high temperature and a high pressure, thereby conducting pressure leaching.
Inventors:
SHOUJI HIROFUMI (JP)
KUDO KEIJI (JP)
OZAKI YOSHITOMO (JP)
KOBAYASHI HIROSHI (JP)
ASANO SATOSHI (JP)
KUDO KEIJI (JP)
OZAKI YOSHITOMO (JP)
KOBAYASHI HIROSHI (JP)
ASANO SATOSHI (JP)
Application Number:
PCT/JP2015/084417
Publication Date:
September 01, 2016
Filing Date:
December 08, 2015
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B23/00; C22B3/08
Foreign References:
| JP2008530356A | 2008-08-07 | |||
| JP2005523996A | 2005-08-11 | |||
| JP2003514109A | 2003-04-15 |
Other References:
See also references of EP 3252177A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
Download PDF: