The influence of Al<sub>2</sub>O<sub>3</sub> content on the microstructure and properties of low basicity refining slag

HUANG Yongsheng; LÜ Ziyu; GU Chao; BAO Yanping

doi:10.7513/j.issn.1004-7638.2025.02.019

Volume 46 Issue 2

May 2025

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HUANG Yongsheng, LÜ Ziyu, GU Chao, BAO Yanping. The influence of Al2O3 content on the microstructure and properties of low basicity refining slag[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(2): 134-141. doi: 10.7513/j.issn.1004-7638.2025.02.019

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HUANG Yongsheng, LÜ Ziyu, GU Chao, BAO Yanping. The influence of Al₂O₃ content on the microstructure and properties of low basicity refining slag[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(2): 134-141. doi: 10.7513/j.issn.1004-7638.2025.02.019

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The influence of Al₂O₃ content on the microstructure and properties of low basicity refining slag

doi: 10.7513/j.issn.1004-7638.2025.02.019

1.
Technology Center, Zenith Steel Group Co., Ltd., Changzhou 213003, Jiangsu, China
2.
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China

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Received Date: 2024-10-18
Available Online: 2025-04-30
Publish Date: 2025-04-30

Abstract

Abstract

The effect of Al₂O₃ content on the microstructure and properties of low basicity refining slag system CaO-MgO-Al₂O₃-SiO₂ was investigated. The effect of different Al₂O₃ contents on the microstructure and properties of the low basicity refining slag system was systematically analyzed using molecular dynamics simulation. The results showed that the increase of Al₂O₃ content had no significant effect on the radial distribution function, coordination number and bond angle of the system, but significantly reduced the FO and NBO contents of the system and strengthened the network structure of the system. In addition, the increase of Al₂O₃ content decreased the diffusion ability of elements in the slag system, and the order of diffusion ability was Mg²⁺>Ca²⁺>Al³⁺>O²⁻>Si⁴⁺. The viscosity of the slag system gradually increased with the increase of Al₂O₃ mass fraction, which was opposite to the trend of the diffusion coefficient. The results establish a link between the structure and performance of low basicity slag systems, and provide theoretical support for the use of suitable low basicity slags for non-aluminum deoxidation processes.
- refining slag,
- low basicity,
- Al₂O₃ content,
- molecular dynamics simulation,
- viscosity,
- diffusion coefficient

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References(17)

References

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