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Physical Modeling of Slag Foaming in Combined Top and Bottom Blowing Converter

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Abstract

The slag-metal-gas multiphase system in converters is crucial for smelting effectiveness and process stability during steelmaking. However, as a key course of the multiphase interaction, slag foaming was not the focus in previous studies due to its complexity. Therefore, we designed a modeling method of slag foaming. Using this method, this article investigated the effects of top blowing impingement and bottom blowing agitation on slag foaming in a combined top and bottom blowing converter. The experimental results indicated that foamed slag, primarily caused by the slag-metal reaction releasing gas, is a significant part of the multiphase system. The maximum height of foamed slag was reduced with increasing bottom blowing gas flowrate as the result of the acceleration of gas escaping. The top blowing gas presented a suppression effect on the foamed slag, which was strengthened by a decrease in top blowing lance height and increase in top blowing gas flowrate.

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Acknowledgements

Financial support to this project is provided by National Natural Science Foundation of China (Grant No. 52174383), National Key R & D Program of China (Grant No. 2017YFC0805100), Liaoning Provincial Natural Science Foundation of China (Grant No. 2019-MS-123), and Fundamental Research Funds for the Central Universities (Grant No. N180725008).

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Authors and Affiliations

  1. Key Laboratory for Ecological Metallurgy of Multimetallic Ores (Ministry of Education), Northeastern University, Wenhua Road, Heping District, Shenyang, 110819, Liaoning Province, People’s Republic of China

    Ruifang Wang, Bo Zhang, Chao Hu, Chengjun Liu & Maofa Jiang

  2. School of Metallurgy, Northeastern University, Wenhua Road, Heping District, Shenyang, 110819, Liaoning Province, People’s Republic of China

    Ruifang Wang, Bo Zhang, Chao Hu, Chengjun Liu & Maofa Jiang

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  1. Ruifang Wang
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  2. Bo Zhang
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  3. Chao Hu
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  4. Chengjun Liu
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Correspondence to Bo Zhang.

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Wang, R., Zhang, B., Hu, C. et al. Physical Modeling of Slag Foaming in Combined Top and Bottom Blowing Converter. JOM 74, 151–158 (2022). https://doi.org/10.1007/s11837-021-04984-5

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  • DOI: https://doi.org/10.1007/s11837-021-04984-5

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