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Simulation of bubble breaking process in a jet mixing reactor for desulfurization of molten iron

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Abstract

The gas–liquid flow behavior of the stirred flow field, the different positions of a single bubble, the initial velocity, the surface tension and the agglomeration of multiple bubbles were studied by CFD numerical simulation. The results show that the pressure distribution and velocity distribution inside the fluid during agitation indicate that the velocity difference between the liquid and the gas phase and the collision between the bubbles caused by the turbulent behavior of the liquid are the important conditions leading to the bubble breakage. Different initial bubble positions and initial bubble velocities have important effects on single bubble breakage. The surface tension is an important condition that affects the bubble breakage. When the surface tension coefficient is 0.7, the bubble will be stretched to the smallest degree; when the surface tension coefficient is 0.1, the bubble will be stretched to the largest degree and it will be easily broken into smaller bubbles. The multi-bubble results show the states and trajectories of coalescence between bubbles. The research results can provide data support for the engineering application of desulfurization process and theoretical guidance for the research of bubble breaking mechanism.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (51904069), the Fundamental Research Funds for the Central Universities (N2223026), and the Scientific Research Fund Project of Northeastern University at Qinhuangdao (XNY201808).

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Authors and Affiliations

  1. School of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao, 066000, Hebei, China

    Chao Lv, Xu-xin Chen, Zhao-xiang Ji & Tao Yang

  2. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, 650000, Yunnan, China

    Chao Lv

  3. School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Hong-liang Zhao

  4. Yingkou Dongbang Environmental Protection Technology Co., Ltd., Yingkou, 115000, Liaoning, China

    Lin-hui Yu

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  1. Chao Lv
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  2. Xu-xin Chen
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  4. Hong-liang Zhao
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  5. Tao Yang
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Correspondence to Chao Lv or Hong-liang Zhao.

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The authors declared that they have no conflicts of interest to this work. We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.

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Lv, C., Chen, Xx., Ji, Zx. et al. Simulation of bubble breaking process in a jet mixing reactor for desulfurization of molten iron. J. Iron Steel Res. Int. 30, 1117–1127 (2023). https://doi.org/10.1007/s42243-023-00984-8

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  • DOI: https://doi.org/10.1007/s42243-023-00984-8

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