Effect of Al2O3/SiO2 and CaO/Al2O3 ratios on wettability and structure of CaO-SiO2-Al2O3-based mold flux system

被引：39
作者：
Wang, Wan-lin [1 ,2 ]
Gao, Er-zhuo [1 ,2 ]
Zhou, Le-jun [1 ,2 ]
Zhang, Lei [1 ,2 ]
Li, Huan [1 ,2 ]
机构：
[1] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
[2] Cent S Univ, Natl Ctr Int Res Clean Met, Changsha 410083, Hunan, Peoples R China
来源：
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL | 2019年 / 26卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Wettability; Melt structure; Interfacial tension; Sessile drop method; Mold flux system; SURFACE-TENSION; INTERFACIAL-TENSION; LIQUID STEEL; MOLTEN IRON; SLAG; VISCOSITY; BEHAVIOR; OXYGEN; MGO; TEMPERATURE;
D O I：
10.1007/s42243-018-0207-z
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effect of Al2O3/SiO2 and CaO/Al2O3 ratios on the molten structure of CaO-SiO2-Al2O3-based mold flux system was analyzed by Fourier transform infrared spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. Also, the variation in the wettability between the mold flux system and an interstitial free (IF) steel substrate was investigated using the sessile drop method. The results indicate that the contact angle and interfacial tension between the molten slag and solid steel increase slightly with the increase in the Al2O3/SiO2 ratio, while they decrease with the increase in the CaO/Al2O3 ratio. The network structure for the designed mold flux system changes gradually from silicate to aluminosilicate and aluminate with the increase in the Al2O3/SiO2 ratio, and the network is simplified with the increase in the CaO/Al2O3 ratio. Besides, combining the results of sessile drop method and melt structure analyses, it suggests that the variation in interfacial properties of mold flux/IF steel substrate is mainly caused by the change in melt structure, especially the variation in free oxygen ions (O2-) and non-bridged oxygen (O-) at the interface.
引用
收藏
页码：355 / 364
页数：10
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