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| Viscosity and surface tension of CaF2–CaO–Al2O3-based slag with varying SiO2 and B2O3 contents for ESR of rotor steel |
| Yi Huang1, Cheng-bin Shi1, Xiu-xiu Wan1, Yu-jing Liang1, Jing Li1, Shu-jie Liu2 |
1 State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
2 Xingtai Shuzhi Metallurgy Technology Co., Ltd., Xingtai 054027, Hebei, China |
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Abstract The effect of SiO2 and B2O3 on viscosity and surface tension of CaF2–CaO–Al2O3–MgO–SiO2–B2O3 slag designed for electroslag remelting of rotor steel was investigated. The viscosity of the slag melts increases with increasing the SiO2 content from 0.37 to 8.03 mass%, and the viscous activation energy increases from 54.21 to 58.49 kJ/mol. Increasing B2O3 content of the slag from 0 to 3.62 mass% exhibits a similar effect on the viscosity, and the activation energy increases from 47.30 to 55.71 kJ/mol. The increase in the viscosity and activation energy for viscous flow of slag is attributed to the enhanced polymerization degree of slag melts network with increasing either SiO2 or B2O3 content. The surface tension of slag melts decreases with increasing temperature. The surface tension of slag melts decreases with increasing either SiO2 or B2O3 content, which is originated from the increase in the polymerization degree and the decrease in the CaO content of the slag.
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Received: 24 May 2022
Published: 25 January 2023
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| Cite this article: |
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Yi Huang,Cheng-bin Shi,Xiu-xiu Wan, et al. Viscosity and surface tension of CaF2–CaO–Al2O3-based slag with varying SiO2 and B2O3 contents for ESR of rotor steel[J]. Journal of Iron and Steel Research International, 2023, 30(1): 74-81.
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2023, Vol. 30 
