Phosphorus and calcium collection method, and mixture produced by said collection method

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United States of America Patent

PATENT NO 9783418
SERIAL NO

15114719

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
NISSHIN STEEL CO LTDTOKYO JAPAN TOKYO METROPOLIS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Asaba, Akihiro Osaka, JP 4 4
Fukui, Yasushi Osaka, JP 21 100
Matsuo, Shoichi Osaka, JP 7 24
Yamamoto, Masaya Osaka, JP 304 4288

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