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Effects of MgO/Al2O3 and CaO/SiO2 ratios on viscosity of high titanium-bearing blast furnace slag

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Abstract

The effects of MgO/Al2O3 and CaO/SiO2 ratios on the viscosity, break-point temperature, and viscous activation energy of a high titanium-bearing slag were studied. The results showed that both the viscosity and the break-point temperature of the slag decreased with the MgO/Al2O3 ratio increasing from 0.50 to 0.65, the viscous activation energy decreased gradually, and the thermal stability became better. In addition, with an increase in CaO/SiO2 ratio from 1.12 to 1.22, the main viscous units in the slag depolymerized and the viscosity of slag decreased. However, the break-point temperature of slag showed an increasing tendency. The viscous activation energy decreased gradually and the thermal stability became better. The basic phase in the experimental high titanium-bearing slag was pyroxene, and its amount increased with increasing the MgO/Al2O3 ratio while decreased with increasing the CaO/SiO2 ratio.

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Acknowledgements

The authors were specially grateful to the National Natural Science Foundation of China (Grant No. 51904063) and the Fundamental Research Funds for the Central Universities (N2025023).

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Authors and Affiliations

  1. School of Metallurgy, Northeastern University, Shenyang, 110819, Liaoning, China

    Hua-bin Gao, Jue Tang, Shu-yu Zhong & Zheng-gen Liu

  2. Liaoning Province Engineering Research Center for Technologies of Low-Carbon Steelmaking, Northeastern University, Shenyang, 110819, Liaoning, China

    Jue Tang

  3. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, Liaoning, China

    Man-sheng Chu

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  1. Hua-bin Gao
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  2. Jue Tang
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Correspondence to Jue Tang.

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Gao, Hb., Tang, J., Chu, Ms. et al. Effects of MgO/Al2O3 and CaO/SiO2 ratios on viscosity of high titanium-bearing blast furnace slag. J. Iron Steel Res. Int. 30, 456–464 (2023). https://doi.org/10.1007/s42243-022-00876-3

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