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Physical modelling of particle transport phenomenon and vibration behavior of converter with bottom powder injection

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Abstract

A cold model of top–bottom blown converter was set up to study the particle transport phenomenon and vibration performance of converter with bottom powder injection. The effect of bottom blowing flow rates, tuyere diameters, arrangements, and powder to gas mass ratios on powder distribution and furnace body vibration was investigated. The results show that the bottom injection parameters and modes have significant effects on the particle transport behavior and furnace vibration. The powder dispersion uniformity and furnace vibration increase with the increase in bottom blowing tuyere diameters. In the lower range of bottom blowing flow rates and powder to gas mass ratios, the powder dispersion uniformity is improved with the increase in them. However, in the higher range, the excessive furnace vibration leads to reduction in uniformity in powder dispersion. When the bottom blowing tuyeres arrange at double arrangement of 0.5R (R refers to the radius of the bottom) distance between tuyere and center of bath bottom, the converter has optimal particle transport behavior and vibration performance. The vibration law of converter with bottom powder injection was revealed by deducing the empirical formulas of furnace vibration maximum amplitude. The vibration intensity is affected by Froude number, powder to gas mass ratio, and tuyere arrangement.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 52074073 and U20A20272) and the Fundamental Research Funds for the Central Universities, NEU (No. N2025017).

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Authors and Affiliations

  1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang, 110819, Liaoning, China

    Jing-shi Zhang, Wen-tao Lou & Miao-yong Zhu

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

    Jing-shi Zhang, Wen-tao Lou & Miao-yong Zhu

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  1. Jing-shi Zhang
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  2. Wen-tao Lou
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  3. Miao-yong Zhu
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Correspondence to Wen-tao Lou or Miao-yong Zhu.

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Zhang, Js., Lou, Wt. & Zhu, My. Physical modelling of particle transport phenomenon and vibration behavior of converter with bottom powder injection. J. Iron Steel Res. Int. 29, 1771–1788 (2022). https://doi.org/10.1007/s42243-022-00805-4

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  • DOI: https://doi.org/10.1007/s42243-022-00805-4

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