VALUABLE METAL RECOVERY METHOD - SUMITOMO METAL MINING CO

Title:

VALUABLE METAL RECOVERY METHOD

Document Type and Number:

WIPO Patent Application WO/2012/111690

Kind Code:

A1

Abstract:

Provided is a method for stabilizing the degree of oxidation of molten battery waste, and definitively separating slag and alloy. The method is provided with a pre-oxidation step (ST20) for roasting and oxidizing battery waste; and a drying step (S20) for melting the battery waste oxidized in the pre-oxidation step, and separating and recovering the slag and the valuable metal alloy. By providing the pre-oxidation step (ST20) for oxidizing the battery waste by roasting in advance of the drying step (S20), it is possible to stably obtain the optimal degree of oxidization in a melting step (ST21), and to improve the slag-alloy separation efficiency.

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Inventors:

TAKAHASHI JUN-ICHI (JP)
MORI KAZUHIRO (JP)
TAN TOSHIROU (JP)

Application Number:

PCT/JP2012/053476

Publication Date:

August 23, 2012

Filing Date:

February 15, 2012

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)
TAKAHASHI JUN-ICHI (JP)
MORI KAZUHIRO (JP)
TAN TOSHIROU (JP)

International Classes:

C22B7/00; B09B3/00; C22B1/02; H01M10/54; C22B15/00; C22B23/02; C22B23/06

Foreign References:

JP2010231925A	2010-10-14
JPH10330855A	1998-12-15
JPH1060551A	1998-03-03
JPH04128324A	1992-04-28
US7169206B2	2007-01-30

Other References: