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| Effect of Al2O3/SiO2 and CaO/Al2O3 ratios on wettability and structure of CaO–SiO2–Al2O3-based mold flux system |
| Wan-lin Wang1,2, Er-zhuo Gao1,2, Le-jun Zhou1,2, Lei Zhang1,2, Huan Li1,2 |
| 1 School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
2 National Center for International Research of Clean Metallurgy, Central South University, Changsha 410083, Hunan, China |
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Abstract 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.
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Received: 25 September 2018
Published: 04 December 2018
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| Cite this article: |
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Wan-lin Wang,Er-zhuo Gao,Le-jun Zhou, et al. Effect of Al2O3/SiO2 and CaO/Al2O3 ratios on wettability and structure of CaO–SiO2–Al2O3-based mold flux system[J]. Journal of Iron and Steel Research International, 2019, 26(4): 355-364.
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| [1] |
Sheng-li Wu ? Zhi-gang Que ? Kai-lang Li. Strengthening granulation behavior of specularite concentrates based on matching of characteristics of iron ores in sintering process[J]. , 2018, 25(10): 1017-1025. |
| [2] |
Qiang Gao,,Yi Min,,*,Cheng-jun Liu,,Mao-fa Jiang,. Structural behavior of F- in mould flux melt of CaO-SiO2-Al2O3-Na2O-CaF2 system[J]. , 2017, 24(11): 1152-1158. |
| [3] |
YUE Qiang;ZOU Zong-shu;et al. Aggregation Kinetics of Inclusions in Swirling Flow Tundish for Continuous Casting[J]. Chinese Journal of Iron and Steel, 2010, 17(5): 6-6. |
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2019, Vol. 26 
