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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/2019/107115
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 comprising carbon dioxide. To this end, the present invention relates to a method for eluting calcium from a steel-making slag. In the present invention, stirring of a slurry comprising a steel-making slag is suppressed in a region within a pulverizing/settling tank on the top side near a liquid surface to cause the steel-making slag to settle, while at the same time the steel-making slag included in the slurry is pulverized or the surface of the steel-making slag is crushed in a region within the pulverizing/settling tank on the bottom side. Carbon dioxide is introduced into the slurry, and the pulverized or crushed steel-making slag is contacted with an aqueous solution in which the carbon dioxide is dissolved.

Inventors:
FUKUI, Yasushi
ASABA, Akihiro
Application Number:
JP2018/041632
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; B09B3/00; C02F1/20
Domestic Patent References:
WO2017163595A12017-09-28
WO2010110088A12010-09-30
Foreign References:
JP2016179909A2016-10-13
JP2011016710A2011-01-27
JP2011093761A2011-05-12
JP2011093760A2011-05-12
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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