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Title:
METHOD FOR ELUTING CALCIUM FROM STEEL-MAKING SLAG, METHOD FOR COLLECTING CALCIUM FROM STEEL-MAKING SLAG, AND DEVICE FOR ELUTING CALCIUM FROM STEEL-MAKING SLAG
Document Type and Number:
WIPO Patent Application WO/2019/107116
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for eluting calcium from a steel-making slag, with which a larger amount of calcium can be easily eluted from the steel-making slag to an aqueous solution containing carbon dioxide. To this end, the present invention relates to a method for eluting calcium from a steel-making slag. In the present invention, a steel-making slag that is included in a slurry which includes the steel-making slag and into which carbon dioxide has been introduced, is made to settle within an eluting/settling tank to increase the concentration of the steel-making slag in the slurry, and the slurry with an increased concentration of the steel-making slag is removed from the eluting/settling tank. The steel-making slag included in the slurry that was removed is pulverized, or the surface of the steel-making slag included in the slurry that was removed is crushed. The slurry including the pulverized or crushed steel-making slag is then reintroduced into the eluting/settling tank.

Inventors:
FUKUI, Yasushi
ASABA, Akihiro
SORATA, Yusuke
IWAMIZU, Yoshiharu
Application Number:
JP2018/041634
Publication Date:
June 06, 2019
Filing Date:
November 09, 2018
Export Citation:
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Assignee:
NISSHIN STEEL CO., LTD. (3-4-1, Marunouchi Chiyoda-k, Tokyo 66, 〒1008366, JP)
International Classes:
C04B5/00; B03C1/00; B03C1/015; B03C1/30; B09B3/00; B09B5/00
Attorney, Agent or Firm:
WASHIDA, Kimihito (8th Floor, Shinjuku First West Bldg. 1-23-7, Nishi-Shinjuku, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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