Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LEACHING TREATMENT METHOD, AND WET SMELTING METHOD OF NICKEL OXIDE ORE
Document Type and Number:
WIPO Patent Application WO/2019/035319
Kind Code:
A1
Abstract:
A leaching treatment method of nickel oxide ore is provided which enables effectively reducing the amount used of sulfuric acid while maintaining a high nickel leaching rate. In this leaching treatment method, leaching treatment is performed by adding sulfuric acid to a slurry of magnesium-containing nickel oxide ore (the ore slurry), resulting in a leached slurry formed from leachate containing nickel and leach residue, wherein the amount of sulfuric acid added is adjusted, in accordance with the ratio (Mg/Ni ratio) of magnesium content to nickel content in the ore slurry, such that the free sulfuric acid concentration in the obtained leached slurry is adjusted to a prescribed concentration.

Inventors:
TANAKA Masahiro (C/O SUMITOMO METAL MINING CO. LTD, 11-3, Shimbashi 5-chome, Minato-k, Tokyo 16, 〒1058716, JP)
OISHI Takao (C/O SUMITOMO METAL MINING CO. LTD, 11-3, Shimbashi 5-chome, Minato-k, Tokyo 16, 〒1058716, JP)
KITAZAKI Tooru (C/O SUMITOMO METAL MINING CO. LTD, 11-3, Shimbashi 5-chome, Minato-k, Tokyo 16, 〒1058716, JP)
Application Number:
JP2018/027519
Publication Date:
February 21, 2019
Filing Date:
July 23, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SUMITOMO METAL MINING CO., LTD. (11-3, Shimbashi 5-chome Minato-k, Tokyo 16, 〒1058716, JP)
International Classes:
C22B23/00; C22B3/08
Foreign References:
JP2015206064A2015-11-19
JP2005350766A2005-12-22
JP2010095788A2010-04-30
JP2008189999A2008-08-21
JP2016156042A2016-09-01
Attorney, Agent or Firm:
SHOBAYASHI Masayuki et al. (Sapia Tower, 1-7-12 Marunouchi, Chiyoda-k, Tokyo 05, 〒1000005, JP)
Download PDF: