Title:
CARBONATION TREATMENT METHOD OF STEELMAKING SLAG
Document Type and Number:
Japanese Patent JP2015205794
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a carbonation treatment method of steelmaking slag which is for effective utilization of steelmaking slag as a substitute for construction materials and building materials and enables effective utilization of COin exhaust gas, a target of emission suppression from the standpoint of global warming prevention.SOLUTION: A carbonation treatment method of steelmaking slag comprises supplying a CO-containing gas containing carbon dioxide to steelmaking slag to bring the steelmaking slag into contact with the CO-containing gas so as to carbonate water-soluble Ca ingredients in the steelmaking slag for insolubilization. The COconcentration of the CO-containing gas is 1 vol.% or higher and lower than 100 vol.%, and the pH required for slag elution water from the treated slag is controlled as a multivariable function of the treatment time for the carbonation treatment, the content of soluble Ca ingredients contained in the steelmaking slag and the COconcentration of the CO-containing gas.
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Inventors:
FUKUYAMA HIROYUKI
TAKAHASHI SHIGEKI
ABE YOICHI
TAKAHASHI SHIGEKI
ABE YOICHI
Application Number:
JP2014087289A
Publication Date:
November 19, 2015
Filing Date:
April 21, 2014
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP
International Classes:
C04B5/00; B01D53/62; B09B3/00; C21C5/28; F27D15/00
Domestic Patent References:
| JP2007022817A | 2007-02-01 | |||
| JP2013208571A | 2013-10-10 | |||
| JP2005097076A | 2005-04-14 | |||
| JP2005200234A | 2005-07-28 |
Attorney, Agent or Firm:
Kazuya Sasaki
Katsuo Naruse
Tomohiro Nakamura
Katsuo Naruse
Tomohiro Nakamura