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Title:
PHOSPHORUS AND CALCIUM COLLECTION METHOD, AND MIXTURE PRODUCED BY SAID COLLECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2015/114703
Kind Code:
A1
Abstract:
An aqueous solution containing 30 ppm or more of carbon dioxide is brought into contact with a steel-making slag to elute phosphorus and calcium contained in the steel-making slag into the aqueous solution. Subsequently, carbon dioxide is removed from the aqueous solution to precipitate a mixture comprising a phosphorus compound and a calcium compound. In this manner, a mixture comprising a phosphorus compound and a calcium compound and containing phosphorus in an amount of 1% by mass or more in terms of phosphorus atom content can be produced.

Inventors:
MATSUO SHOICHI
ASABA AKIHIRO
FUKUI YASUSHI
YAMAMOTO MASAYA
Application Number:
PCT/JP2014/005662
Publication Date:
August 06, 2015
Filing Date:
November 11, 2014
Export Citation:
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Assignee:
NISSHIN STEEL CO LTD (JP)
International Classes:
C04B5/00; C01B25/01
Foreign References:
JP2013142046A2013-07-22
JP2008000664A2008-01-10
JP2010270378A2010-12-02
JPS55100220A1980-07-31
JP2010120782A2010-06-03
JP2013147370A2013-08-01
JP2010270378A2010-12-02
JP2013142046A2013-07-22
JPS55100220A1980-07-31
Other References:
"Mineral Resources Material Flow 2011", May 2012, JAPAN OIL, GAS AND METALS NATIONAL CORPORATION, pages: 405 - 410
KAZUYO MATSUBAE ET AL.: "Recovery of Artificial Phosphorus Resource from Wastes", COLLECTION OF SOCIOTECHNOLOGY RESEARCH PAPERS, SOCIOTECHNOLOGY RESEARCH NETWORK, March 2008 (2008-03-01), pages 106 - 113
Attorney, Agent or Firm:
WASHIDA, KIMIHITO (JP)
Koichi Washida (JP)
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