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METHOD FOR MODIFYING STEEL SLAG
PROBLEM TO BE SOLVED: To provide a method for modifying steel slag without need for using a modifier and capable of using blowing gas other than pure oxygen.SOLUTION: There is provided a method for modifying steel slag conducted by blowing oxygen gas-containing gas into steel slag in a molten state, where a modifier is not used, the steel slag having a value represented by the following formula (1) of 1 or less, and the slag after modification having a value represented by the following formula (2) of 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)SELECTED DRAWING: Figure 1
【課題】改質材を用いる必要がなく、純酸素以外の吹込みガスも利用可能な製鋼スラグの改質方法を提供する。【解決手段】溶融状態の製鋼スラグに酸素ガス含有気体を吹込むことによって行う製鋼スラグの改質方法において、改質材を使用せず、前記製鋼スラグとして下記式（１）で表される値が１以下となるものを用い、前記改質後のスラグについて下記式（２）で表される値を１以下とすることを特徴とする製鋼スラグの改質方法。記［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）【選択図】 図１
METHOD FOR MODIFYING STEEL SLAG
PROBLEM TO BE SOLVED: To provide a method for modifying steel slag without need for using a modifier and capable of using blowing gas other than pure oxygen.SOLUTION: There is provided a method for modifying steel slag conducted by blowing oxygen gas-containing gas into steel slag in a molten state, where a modifier is not used, the steel slag having a value represented by the following formula (1) of 1 or less, and the slag after modification having a value represented by the following formula (2) of 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)SELECTED DRAWING: Figure 1
【課題】改質材を用いる必要がなく、純酸素以外の吹込みガスも利用可能な製鋼スラグの改質方法を提供する。【解決手段】溶融状態の製鋼スラグに酸素ガス含有気体を吹込むことによって行う製鋼スラグの改質方法において、改質材を使用せず、前記製鋼スラグとして下記式（１）で表される値が１以下となるものを用い、前記改質後のスラグについて下記式（２）で表される値を１以下とすることを特徴とする製鋼スラグの改質方法。記［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）【選択図】 図１
METHOD FOR MODIFYING STEEL SLAG
製鋼スラグの改質方法
KATO YUSUKE (author) / MATSUNAGA HISAHIRO (author) / MIYATA YASUTO (author)
2016-03-10
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
METHOD FOR MODIFYING STEEL SLAG AND METHOD FOR MANUFACTURING STEEL SLAG
| European Patent Office | 2017