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CFD Simulation of Suspension Characteristics in a Stirred Tank for Slurry Electrolysis

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Abstract

Slurry electrolysis (SE) is a one-step green electrochemical technology used for the treatment of complex ores and solid waste. To explore the solid–liquid suspension characteristics of an SE stirred tank for antimony ores, a computational fluid dynamics (CFD) model was adopted using a Eulerian-Eulerian model. The kinetic theory of granular flow model was utilized to consider the particle–particle and particle–wall interactions. The solids holdup distribution predicted by the CFD model was consistent with water model experiments. According to the velocity vector distribution, the stirred tank was divided into five regions. The solids concentration was higher in the weak circulation region around the tank wall, and it was lower in the convection region and the upper part of the fluid falling region. Moreover, the variation curves of the liquid velocity and solids concentration demonstrated that the flow was centrally symmetric and that the presence of membranes and anodes contributed to the ordering of fluid flow. The mixing times in the strong circulation and weak circulation regions were both close to 20 seconds. The fluid flow between the anodic baffles, 94 seconds, was the limiting factor for mixing time.

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Acknowledgments

The authors are grateful for the financial supports from the National Natural Science Foundation of China (No. 51974018).

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On behalf of all authors, the corresponding author states that there is no conflict of interest.

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Authors and Affiliations

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

    Tingting Lu, Hao Shen, Xin Gao, Yadong Xiao, Hongliang Zhao & Fengqin Liu

  2. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Guoyi Na

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  1. Tingting Lu
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  2. Hao Shen
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  3. Guoyi Na
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  4. Xin Gao
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Correspondence to Hongliang Zhao or Fengqin Liu.

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Lu, T., Shen, H., Na, G. et al. CFD Simulation of Suspension Characteristics in a Stirred Tank for Slurry Electrolysis. Metall Mater Trans B 53, 1747–1758 (2022). https://doi.org/10.1007/s11663-022-02484-8

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  • DOI: https://doi.org/10.1007/s11663-022-02484-8

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