WET METALLURGY METHOD FOR NICKEL OXIDE MINERAL ORE

WIPO Patent Application WO/2019/049593

A1

Provided is a wet metallurgy method for a nickel oxide mineral ore, the method being capable of effectively increasing the pH of a processing liquid and capable of efficiently facilitating a sulfurization reaction using the processing liquid without causing a deterioration in the solid-liquid separation properties of a slurry following a neutralization reaction of a leachate. This wet metallurgy method for a nickel oxide mineral ore comprises subjecting a leachate, which is obtained by leaching a nickel oxide mineral ore through addition of sulfuric acid, to a neutralization treatment in a neutralization reaction tank 11, subjecting the neutralized slurry to solid-liquid separation in a solid-liquid separation apparatus 12 so as to obtain a neutralized liquid, and subjecting the neutralized liquid to a sulfurization treatment so as to separate and recover nickel and cobalt. A coagulant is added to a liquid feed line 13 that feeds the neutralized slurry from the neutralization reaction tank 11 to the solid-liquid separation apparatus 12, and the neutralized slurry that has passed through the liquid feed line 13 is subjected to solid-liquid separation.

TANAKA MASAHIRO (JP)
HAYATA JIRO (JP)

PCT/JP2018/029778

March 14, 2019

August 08, 2018

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SUMITOMO METAL MINING CO (JP)

C22B23/00; B01D21/01; C22B3/08; C22B3/22; C22B3/44

WO2008003160A1

2008-01-10

JP2014101548A	2014-06-05
JPH0760009A	1995-03-07
US20150053623A1	2015-02-26
US20140150886A1	2014-06-05
JP2005213343A	2005-08-11
JP2010075802A	2010-04-08

SHOBAYASHI Masayuki et al. (JP)

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