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Numerical Investigation of Inclusion Motion at Molten Steel–Liquid Slag Interface During Ruhrstahl Heraeus (RH) Process

  • Multiphase Flows in Materials Processing
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Abstract

A CFD and inclusion at interface (IAT) coupled model was built and applied to simulate the floating, collision, and removal of inclusion during the Ruhrstahl Heraeus (RH) process. In the model, the influence of fluid flow, the interfacial properties, the wettability, and the viscosity of each phase are considered. The results show that during the RH process, the inclusion size tends to increase via collisions driven by the flow and buoyancy. The volume fraction of inclusion at certain aggregation points even reaches 10−4 magnitude. The different results of the model with and without the IAT boundary condition (BC) were compared, showing that with IAT BC, more inclusions are blocked by the steel–slag interface, especially the ones with a smaller size. The optimization of the bottom gas blowing rate shows that an excessively small or large blowing rate is hazardous for the inclusion removal.

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Acknowledgement

This research is supported by the National Science Foundation of China (No. 51574020 and 51674023).

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Authors and Affiliations

  1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, People’s Republic of China

    Wei Liu, Shufeng Yang & Jingshe Li

  2. National Engineering Research Center for Rare Earth Materials, General Research Institute for Nonferrous Metals, Beijing, 100088, People’s Republic of China

    Hongbo Yang

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  1. Wei Liu
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  2. Shufeng Yang
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  3. Jingshe Li
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Correspondence to Shufeng Yang.

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Liu, W., Yang, S., Li, J. et al. Numerical Investigation of Inclusion Motion at Molten Steel–Liquid Slag Interface During Ruhrstahl Heraeus (RH) Process. JOM 70, 2877–2885 (2018). https://doi.org/10.1007/s11837-018-3115-6

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  • DOI: https://doi.org/10.1007/s11837-018-3115-6

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