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Fluid–Solid Coupling Simulation on the Temperature Distribution of Tuyere Used for Oxygen Bottom Blowing Converter

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Abstract

For an oxygen bottom blowing converter, a high-temperature fire spot zone forms above the tuyere owing to oxygen reaction. The bottom blowing tuyere and surrounding brick are simultaneously heated by high-temperature fire spot and flowing molten steel. High-speed fluids flowing in the inner tube and the annular gap of the tuyere can remove part of the heat transferred from the fire spot zone and molten steel, playing a vital role in cooling the tuyere. To determine the temperature distributions of the tuyere and surrounding brick under the condition of oxygen bottom blowing, a fluid–solid coupling heat transfer numerical model that considers both the radiation of the fire spot and convection of the molten steel was established in this study. The simulation results agree well with previous experimental results; thus, the numerical model was validated. Utilizing the validated model, the influences of the tuyere inner tube material and fire spot zone temperature on the tuyere temperature distribution were studied in detail. Along with an increase in the material thermal conductivity, the maximum temperature of the inner tube at the hot face decreased, verifying the superiority of copper as the inner tube. More importantly, it was found that reducing the fire spot zone temperature by mixing CO2 in the bottom blowing oxygen fundamentally alleviated the burning loss of the tuyere and the surrounding brick.

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Acknowledgments

The authors would like to extend their sincere grateful for the support by National Natural Science Foundation of China (Nos. 51574021, 51474024, and 51604022).

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Authors and Affiliations

  1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Shaoyan Hu, Rong Zhu, Runzao Liu, Kai Dong & Zhihui Li

  2. Beijing Key Laboratory of Research Center of Special Melting and Preparation of High-End Metal Materials, University of Science and Technology Beijing, Beijing, 100083, China

    Shaoyan Hu, Rong Zhu, Runzao Liu, Kai Dong & Zhihui Li

Authors
  1. Shaoyan Hu
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  2. Rong Zhu
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  3. Runzao Liu
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  4. Kai Dong
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Correspondence to Rong Zhu.

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Manuscript submitted April 30, 2018.

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Hu, S., Zhu, R., Liu, R. et al. Fluid–Solid Coupling Simulation on the Temperature Distribution of Tuyere Used for Oxygen Bottom Blowing Converter. Metall Mater Trans B 49, 3317–3329 (2018). https://doi.org/10.1007/s11663-018-1375-8

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  • DOI: https://doi.org/10.1007/s11663-018-1375-8

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