Title:
PROCESS OF PRODUCEING SUPERFINE COBALT POWDER WITH CIRCULATION TECHNOLOGY AND ITS APPARATUS
Document Type and Number:
WIPO Patent Application WO/2007/071108
Kind Code:
A1
Abstract:
A process of producing superfine cobalt powder with circulation technology is provided, which synthesizes Co-compound precursor by means of twice extracting and atomization hydrolyzing, then the Co-compound precursor is subjected to explosion and thermal reduction at sectional temperatures to effectively obtain 0.1-2µm superfine cobalt powder from waste material containing cobalt. The said production process uses spent batteries as start material, and emits no waste water or exhaust gas during the process. The spheric or like-spheric and fiberous cobalt powder obtained by the said process is suitable for the manufacture of power battery and high performance powder metallurgy articles and helpful to increase the quality and service life of products. The cobalt powder produced by present invention has uniform particle distribution, good product consistence, adjustable particle shape, size or apparent density, low carbon content and good product quality. The apparatus used for said process is also provided in the present invention, which has simple structure and lowered cost.
Inventors:
XU KAIHUA (CN)
Application Number:
PCT/CN2005/002265
Publication Date:
June 28, 2007
Filing Date:
December 21, 2005
Export Citation:
Assignee:
SHENZHEN GEM HIGH TECH CO LTD (CN)
JINGMEN GEM NEW MATERIAL CO LT (CN)
XU KAIHUA (CN)
JINGMEN GEM NEW MATERIAL CO LT (CN)
XU KAIHUA (CN)
International Classes:
B22F9/18; C22B23/00
Foreign References:
| CN1688065A | 2005-10-26 | |||
| CN1586772A | 2005-03-02 | |||
| CN2375937Y | 2000-04-26 | |||
| CN1506182A | 2004-06-23 | |||
| JP2005149889A | 2005-06-09 | |||
| JPH09111360A | 1997-04-28 | |||
| US6680034B2 | 2004-01-20 |
Other References:
WU F.: "Recovery of Cobalt and Lithium from Spent Lithium-ion Secondary Batteries", THE CHINESE JOURNAL OF NONFERROUS METAL, vol. 14, no. 4, April 2004 (2004-04-01)
Attorney, Agent or Firm:
BEIJING BEIXIN-ZHICHENG INTELLECTUAL PROPERTY AGENT CO., LTD (Xizhimen Nandajie Xicheng District, Beijing 5, CN)
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