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Influence of bottom blowing oxygen on dust emission in converter steelmaking

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Abstract

With the importance of the steelmaking industry in the economy and its negative impacts on the environment, reducing dust emissions is a vital focus in this field. Thus, the theory of dust generation in converter steelmaking process was analyzed and the influence of bottom blowing oxygen on dust generation was obtained through experimental research. The industrial test was carried out in a 120-t bottom combined blown O2–CaO steelmaking converter. The results show that lowering the lance position can reduce the amount of dust. This emission rate of the converter is also found to be in direct proportion to the decarburization rate. As a result, the proposed bottom blowing O2–CaO steelmaking converter can technically reduce the amount of dust and improve the recovery rate of iron. With more bottom blowing oxygen, the dust content is lower with the dust peak appearing earlier. The evaporation theory, followed by the bubble theory, plays the primary role in the dust generation of bottom blowing oxygen steelmaking. It points out the direction for the technology research and development of reducing dust generation.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 51574021 and 51474024) and the Fundamental Research Funds for the Central Universities (FRF-TP-19-031A1).

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Authors and Affiliations

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

    Wei-feng Li, Rong Zhu, Chao Feng, Bao-chen Han & Guang-sheng Wei

  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

    Wei-feng Li, Rong Zhu, Chao Feng, Bao-chen Han & Guang-sheng Wei

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  1. Wei-feng Li
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  2. Rong Zhu
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  3. Chao Feng
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Correspondence to Wei-feng Li.

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Li, Wf., Zhu, R., Feng, C. et al. Influence of bottom blowing oxygen on dust emission in converter steelmaking. J. Iron Steel Res. Int. 28, 1105–1113 (2021). https://doi.org/10.1007/s42243-020-00550-6

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  • DOI: https://doi.org/10.1007/s42243-020-00550-6

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