Effect of TiO<sub>2</sub> on viscosity and structure of high-temperature slag wool melts

Lu Xi; Pang Zhuogang; Zhang Lianzeng; Xing Xiangdong; Gao Ming; Ning Shunli

doi:10.7513/j.issn.1004-7638.2021.01.009

Volume 42 Issue 1

Feb. 2021

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Lu Xi, Pang Zhuogang, Zhang Lianzeng, Xing Xiangdong, Gao Ming, Ning Shunli. Effect of TiO2 on viscosity and structure of high-temperature slag wool melts[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 55-59. doi: 10.7513/j.issn.1004-7638.2021.01.009

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Lu Xi, Pang Zhuogang, Zhang Lianzeng, Xing Xiangdong, Gao Ming, Ning Shunli. Effect of TiO₂ on viscosity and structure of high-temperature slag wool melts[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 55-59. doi: 10.7513/j.issn.1004-7638.2021.01.009

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Effect of TiO₂ on viscosity and structure of high-temperature slag wool melts

doi: 10.7513/j.issn.1004-7638.2021.01.009

1.
Huaqing College, Xi’an University of Architecture and Technology, Xi’an 710043, Shanxi, China
2.
College of Metallurgy Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, Shanxi, China
3.
Rizhao Steel Holding Group Co., Ltd., Rizhao 276806, Shandong, China

Received Date: 2020-08-31
Publish Date: 2021-02-10

Abstract

Abstract

In order to study the effect of TiO₂ on the viscosity of high-temperature slag wool melts, the CaO–MgO–Al₂O₃–SiO₂–TiO₂ based slag system was used as the research object. And the viscosity variation of the slag wool melt with the acidity coefficient of 1.4 was systematically studied by using the cylinder rotation method, and the changes of slag structure were analyzed by Raman spectra. The results show that when the content of TiO₂ increases from 1% to 4%, the viscosity of the melt gradually decreases, and the activation energy of viscous flow decreases from 170.45 kJ/mol to 158.62 kJ/mol. When the temperature is higher than 1 350 ℃, the viscosity of the samples is lower than 1.5 Pa·s, which means the melts have well fluidity. Meanwhile, Q⁰ and Q¹ within the [SiO₄]-tetrahedral structure gradually increase, while Q² and Q³ gradually decrease. The average number of bridge oxygen decreases from 1.69 to 0.95, and the polymerization degree of the melt structure decreases. The increase of the Ti–O bond reduces the stability of the melt structure.
- acidic Ti-bearing slag,
- slag wool,
- viscosity,
- activation energy,
- melt structure,
- Raman spectra

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References(14)

References

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