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
ASABA AKIHIRO
Application Number:
PCT/JP2018/041632
Publication Date:
June 06, 2019
Filing Date:
November 09, 2018
Export Citation:
Assignee:
NISSHIN STEEL CO LTD (JP)
International Classes:
C04B5/00; B09B3/00; C02F1/20
Domestic Patent References:
| WO2017163595A1 | 2017-09-28 | |||
| WO2010110088A1 | 2010-09-30 |
Foreign References:
| JP2016179909A | 2016-10-13 | |||
| JP2011016710A | 2011-01-27 | |||
| JP2011093761A | 2011-05-12 | |||
| JP2011093760A | 2011-05-12 |
Attorney, Agent or Firm:
WASHIDA, Kimihito (JP)
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