Crystallization of CaO-SiO2-TiO2 slag as a candidate for fluorine free mold flux

被引：132
作者：
Nakada, Hideko [1 ]
Nagata, Kazuhiro [1 ]
机构：
[1] Tokyo Inst Technol, Dept Chem & Mat Sci, Meguro Ku, Tokyo 1528552, Japan
来源：
ISIJ INTERNATIONAL | 2006年 / 46卷 / 03期
关键词：
heat transfer control; TTT diagram; CaO-SiO2-TiO2; slag; fluorine free mold flux;
D O I：
10.2355/isijinternational.46.441
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The time-temperature-transformation diagram (TTT diagram) of CaO-SiO2 TiO2 slag has been determined by using differential thermal analysis (DTA) in order to investigate the crystallization of the slag as a candidate for fluorine free mold flux. The incubation time of CaOSiO2TO2 in CaO-SiO2 TiO2 slag is as small as that of cuspidine (3CaO(2)SiO(2)CaF(2)) in commercial mold fluxes. This finding indicates that the CaOSiO2TO2 crystallizes rapidly in the slag film between the mold and the steel in the continuous casting machine, similar to cuspidine in commercial mold fluxes. CaOSiO2TO2 in CaO-SiO2TO2 slag is substituted for cuspidine in commercial mold fluxes. The thickness of the crystalline layer of CaOSiO2TiO2 is smaller than that of cuspidine. In order to improve the heat transfer control of CaO-SiO2 TO2 slag, it is necessary to decrease the incubation time of CaOSiO2TO2 at high temperature.
引用
收藏
页码：441 / 449
页数：9
相关论文
共 28 条
[1]  
Bagha S., 1988, P 3 INT C MOLT SLAGS, P235
[2]  
BILLANY TJH, 1991, IRONMAK STEELMAK, V18, P403
[3]   Thermal resistance at the interface between mold flux film and mold for continuous casting of steels [J].
Cho, J ;
Shibata, H ;
Emi, T ;
Suzuki, M .
ISIJ INTERNATIONAL, 1998, 38 (05) :440-446
[4]   Heat transfer across mold flux film in mold during initial solidification in continuous casting of steel [J].
Cho, JW ;
Emi, T ;
Shibata, H ;
Suzuki, M .
ISIJ INTERNATIONAL, 1998, 38 (08) :834-842
[5]  
DEVRIES RC, 1955, J AM CERAM SOC, V38, P158
[6]  
Frohberg H, 1962, ARCH EISENHUTTENWES, V33, P421
[7]  
GRIEVESON P, 1988, IRONMAK STEELMAK, V15, P181
[8]   Influence of Na20 on phase relation between mold flux composition and cuspidine [J].
Hanao, M ;
Kawamoto, M ;
Watanabe, T .
ISIJ INTERNATIONAL, 2004, 44 (05) :827-835
[9]  
Hashimoto H., 2004, CAMP ISIJ, V17, P849
[10]   An investigation of the crystallization of a continuous casting mold slag using the single hot thermocouple technique [J].
Kashiwaya, Y ;
Cicutti, CE ;
Cramb, AW .
ISIJ INTERNATIONAL, 1998, 38 (04) :357-365
123