Title:
製鋼スラグの改質方法および製鋼スラグの製造方法
Document Type and Number:
Japanese Patent JP6443463
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for modifying steel slag capable of suppressing hydration expansion by modifying the steel slag while maintaining good slag discharge property.SOLUTION: There is provided a method for modifying a slag steel 2 by blowing oxygen gas-containing gas 4 to a steel slag 2 at a molten state for 1.0 to 20 min., where one with a value represented by the formula (1) of 1 or less is used as the steel slag 2 and a value represented by the formula (2) of the slag 2 after modification is 1 or less. [T-CaO]-(1.87×[SiO]+1.43×([T-Fe]-1.55)+1.10×[AlO]+1.18×[PO]) (1). [T-CaO]-(1.87×[SiO]+0.70×[FeO]+1.10×[AlO]+1.18×[PO]) (2). [] is content (mass%) of a compound or an element in the parenthesis. There is provided a method for modifying the steel slag 2 with the amount of blowing of the oxygen gas-containing gas 4 is 8 to 26 Nm-O/t-slag in terms of oxygen content.SELECTED DRAWING: Figure 1
Inventors:
Yusuke Kato
Application Number:
JP2017010318A
Publication Date:
December 26, 2018
Filing Date:
January 24, 2017
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C04B5/06; C21C1/02; C21C5/28; C21C5/54; F27D15/00
Domestic Patent References:
| JP2003183717A | ||||
| JP57036963B2 | ||||
| JP56069315A | ||||
| JP51077518A | ||||
| JP2003155511A |
Attorney, Agent or Firm:
Kenji Sugimura
Keisuke Kawahara
Nobuyuki Ichieda
Keisuke Kawahara
Nobuyuki Ichieda