Title:
VALUABLE METAL RECOVERY METHOD
Document Type and Number:
WIPO Patent Application WO/2012/111693
Kind Code:
A1
Abstract:
Provided is a method for improving the recovery rate of valuable metals such as cobalt when drying the battery waste of lithium ion batteries and the like. A second alloy excellent in terms of iron-cobalt separation performance and containing a small amount of iron is obtained by performing: a pre-oxidation step (ST20) for roasting and pre-oxidizing battery waste containing aluminum and iron; a melting step (ST21) for obtaining a molten product by melting the battery waste after the pre-oxidation step; a first slag separation step (ST22) for separating and recovering first slag containing aluminum oxide from the molten product; a second oxidation step (ST23) for oxidizing a molten first alloy after the first slag separation step; and a second slag separation step (ST24) for separating and recovering a second slag containing iron from a second alloy after the second oxidation step (ST23).
Inventors:
TAKAHASHI JUN-ICHI (JP)
MORI KAZUHIRO (JP)
TAN TOSHIROU (JP)
MORI KAZUHIRO (JP)
TAN TOSHIROU (JP)
Application Number:
PCT/JP2012/053491
Publication Date:
August 23, 2012
Filing Date:
February 15, 2012
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
TAKAHASHI JUN-ICHI (JP)
MORI KAZUHIRO (JP)
TAN TOSHIROU (JP)
TAKAHASHI JUN-ICHI (JP)
MORI KAZUHIRO (JP)
TAN TOSHIROU (JP)
International Classes:
B09B3/00; C22B23/02; B09B5/00; C22B1/02; C22B7/00; H01M6/52; H01M10/54
Foreign References:
JPH09291317A | 1997-11-11 | |||
JPH09316678A | 1997-12-09 | |||
JPH11242967A | 1999-09-07 | |||
JP2005042189A | 2005-02-17 | |||
JP2012057238A | 2012-03-22 | |||
US7169206B2 | 2007-01-30 |
Other References:
See also references of EP 2677048A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
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Claims:
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