COBALT POWDER PRODUCTION METHOD - SUMITOMO METAL MINING CO

Title:

COBALT POWDER PRODUCTION METHOD

Document Type and Number:

WIPO Patent Application WO/2016/152690

Kind Code:

A1

Abstract:

Provided is a production method that, using an industrially inexpensive H2 gas, generates coarse-grained high-purity Co powder from a sulfuric acid cobalt amine complex solution by using minute Co powder. A production process is for generating a Co powder from a Co-containing substance, using a sulfuric acid cobalt amine complex solution, wherein the process is characterized by the following steps being carried out: a seed-crystal adding step for forming a mixed slurry by adding seed-crystal Co powder to the complex solution; a reducing step for blowing H2 gas into the mixed slurry and forming a reduced slurry which contains Co powder that precipitated on the seed crystals as a result of reducing the Co component in the slurry; a growing step for blowing H2 gas into the slurry in which the complex solution was added to the Co powder obtained by carrying out liquid-solid separation of the reduced slurry, and for forming a slurry which contains a grown Co powder in which the Co component in the slurry was precipitated on the surface of the Co powder; a recovery step which follows the reducing step and in which the Co powder is recovered by carrying out liquid-solid separation of the reduced slurry that contains the Co powder; and a recovery step which follows the growing step and in which the Co powder is recovered by carrying out liquid-solid separation of the slurry that contains the grown Co powder.

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Inventors:

HEGURI SHIN-ICHI (JP)
OZAKI YOSHITOMO (JP)
TAKAISHI KAZUYUKI (JP)
DOI YASUO (JP)
IKEDA OSAMU (JP)
YAMAGUMA RYOMA (JP)
KUDO YOHEI (JP)

Application Number:

PCT/JP2016/058384

Publication Date:

September 29, 2016

Filing Date:

March 16, 2016

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)

International Classes:

C22B23/00; B22F9/26; C22B3/08; C22B3/26

Foreign References:

JPH02503575A	1990-10-25
JP2012012619A	2012-01-19

Other References: