Study on viscous flow characteristics of CaO-SiO2- MgO-Al2O3-TiO2-CaCl2 slag system

Qiao Junqiang; Wang Zhenfei; Pan Yuejun; Xing Xiangdong; Zhang Jianliang; Xu Runsheng

doi:10.7513/j.issn.1004-7638.2024.01.021

Volume 45 Issue 1

Feb. 2024

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Qiao Junqiang, Wang Zhenfei, Pan Yuejun, Xing Xiangdong, Zhang Jianliang, Xu Runsheng. Study on viscous flow characteristics of CaO-SiO2- MgO-Al2O3-TiO2-CaCl2 slag system[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(1): 145-151. doi: 10.7513/j.issn.1004-7638.2024.01.021

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Qiao Junqiang, Wang Zhenfei, Pan Yuejun, Xing Xiangdong, Zhang Jianliang, Xu Runsheng. Study on viscous flow characteristics of CaO-SiO₂- MgO-Al₂O₃-TiO₂-CaCl₂ slag system[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(1): 145-151. doi: 10.7513/j.issn.1004-7638.2024.01.021

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Study on viscous flow characteristics of CaO-SiO₂- MgO-Al₂O₃-TiO₂-CaCl₂ slag system

doi: 10.7513/j.issn.1004-7638.2024.01.021

1.
China National Energy Group Shendong Group Co., Ltd., Ordos 719315, Inner Mongolia , China
2.
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2022-08-28
Publish Date: 2024-02-29

Abstract

Abstract

The viscous flow characteristics of slag are closely related to the stability of the blast furnace. In this paper, the viscosity and melting temperature of chlorine-containing high-titanium slag (CaO-SiO₂-MgO-Al₂O₃-TiO₂-CaCl₂) were studied, and their structural evolution was analyzed by Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. The results show that the addition of chlorine element can reduce the viscosity of the slag and simplify the structure of the slag. Due to the easy evaporation of chlorine element at high temperature, the chlorine content decreased slightly during the viscosity test. The variation trend of viscous flow activation energy is similar to that of viscosity. The [SiO₄]⁻ tetrahedral structure and Ti-O-Ti/Si bonds are also broken. The relative area fractions of the Q² and Q³ units decreased and the relative area fractions of the Q⁰ and Q¹ units increased, resulting in a decrease in the degree of slag polymerization.
- chlorine-containing high-titanium blast furnace slag,
- viscous flow characteristics,
- melting temperature,
- slag structure

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References(29)

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