Abstract
Motion of non-metallic inclusions (NMIs) in molten steel and deposition of them on nozzle wall leading to clogging are simulated using a two-way coupling model. In this model different steps of clogging have been considered including transport of NMIs by turbulent melt flow towards the nozzle wall, adhesion of the NMI on the wall, and formation and growth of clogging material by the NMI deposition. The model is used to simulate clogging in a pilot scale device. The results show that the model reproduces these clogging steps well until complete blockage of the flow path in the nozzle. It is found that clog growth step plays critical role for prediction of the clogging process and understanding melt flow and NMI behaviors during the process. Without implementation of this step, unrealistic melt flow rate is obtained leading to incorrect particle deposition rate. In addition, if the clog growth is ignored, distribution of deposition material becomes more uniform with overestimated amount of total deposition mass.
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Acknowledgements
The research leading to these results has received funding from the European Union’s Research Fund for Coal and Steel (RFCS) research program under grant agreement No. RFSR-CT-2014-00009. The authors also gratefully acknowledge the funding support of K1-MET, metallurgical competence center. The research program of the K1-MET competence center is supported by COMET (Competence Center for Excellent Technologies), the Austrian program for competence centers. COMET is funded by the Federal Ministry for Transport, Innovation and Technology, the Federal Ministry for Science, Research and Economy, the provinces of Upper Austria, Tyrol and Styria as well as the Styrian Business Promotion Agency (SFG).
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Barati, H., Wu, M., Holzmann, T., Kharicha, A., Ludwig, A. (2018). Simulation of Non-metallic Inclusion Deposition and Clogging of Nozzle. In: Nastac, L., Pericleous, K., Sabau, A., Zhang, L., Thomas, B. (eds) CFD Modeling and Simulation in Materials Processing 2018. TMS 2018. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-72059-3_15
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DOI: https://doi.org/10.1007/978-3-319-72059-3_15
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