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A platform for research: civil engineering, architecture and urbanism
METHOD FOR MODIFYING STEEL SLAG AND METHOD FOR MANUFACTURING STEEL SLAG
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
【課題】良好な排滓性を保ちつつ、製鋼スラグを改質して水和膨張を抑制できる製鋼スラグの改質方法の提供。【解決手段】溶融状態の製鋼スラグ２に酸素ガス含有気体４を１．０〜２０分間吹込みによる製鋼スラグ２の改質方法で、製鋼スラグ２として式（１）で表される値が１以下のものを用い、改質後のスラグ２について式（２）で表される値を１以下とする製鋼スラグの改質方法。［Ｔ−ＣａＯ］−（１．８７×［ＳｉＯ２］＋１．４３×（［Ｔ−Ｆｅ］−１．５５）＋１．１０×［Ａｌ２Ｏ３］＋１．１８×［Ｐ２Ｏ５］）・・・（１）、［Ｔ−ＣａＯ］−（１．８７×［ＳｉＯ２］＋０．７０×［Ｆｅ２Ｏ３］＋１．１０×［Ａｌ２Ｏ３］＋１．１８×［Ｐ２Ｏ５］）・・・（２）（［］は括弧内の化合物又は元素の含有量（質量％））酸素ガス含有気体４の吹込み量が酸素分換算で８〜２６Ｎｍ３−Ｏ２／ｔ−ｓｌａｇである、製鋼スラグ２の改質方法。【選択図】図１
METHOD FOR MODIFYING STEEL SLAG AND METHOD FOR MANUFACTURING STEEL SLAG
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
【課題】良好な排滓性を保ちつつ、製鋼スラグを改質して水和膨張を抑制できる製鋼スラグの改質方法の提供。【解決手段】溶融状態の製鋼スラグ２に酸素ガス含有気体４を１．０〜２０分間吹込みによる製鋼スラグ２の改質方法で、製鋼スラグ２として式（１）で表される値が１以下のものを用い、改質後のスラグ２について式（２）で表される値を１以下とする製鋼スラグの改質方法。［Ｔ−ＣａＯ］−（１．８７×［ＳｉＯ２］＋１．４３×（［Ｔ−Ｆｅ］−１．５５）＋１．１０×［Ａｌ２Ｏ３］＋１．１８×［Ｐ２Ｏ５］）・・・（１）、［Ｔ−ＣａＯ］−（１．８７×［ＳｉＯ２］＋０．７０×［Ｆｅ２Ｏ３］＋１．１０×［Ａｌ２Ｏ３］＋１．１８×［Ｐ２Ｏ５］）・・・（２）（［］は括弧内の化合物又は元素の含有量（質量％））酸素ガス含有気体４の吹込み量が酸素分換算で８〜２６Ｎｍ３−Ｏ２／ｔ−ｓｌａｇである、製鋼スラグ２の改質方法。【選択図】図１
METHOD FOR MODIFYING STEEL SLAG AND METHOD FOR MANUFACTURING STEEL SLAG
製鋼スラグの改質方法および製鋼スラグの製造方法
KATO YUSUKE (author) / TAKAHASHI KATSUNORI (author)
2017-08-17
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
C21C
Weiterverarbeiten von Roheisen, z.B. Feinen, Herstellen von Schweißeisen oder Stahl
,
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
,
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE