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Simulation of Centimeter-Level Particle Motion Behavior in the Ruhrstahl–Heraeus Reactor Based on Situ Formation Micro-phase Molten Steel Purification Technology

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Abstract

In situ formation micro-phase molten steel purification technology is a new inclusions control technology. In this study, to increase the purification efficiency of the composite particles in the Ruhrstahl–Heraeus (RH) reactor, a water model was used to simulate the addition process of the spherical particles. The effects of gas flow rate and immersion depth on particle motion behavior were carefully investigated. The settling process of the particles in the reactor was further analyzed with kinetic theory. Industrial trials in a 180-t RH were also conducted to validate the effect of the composite particle treatment on steel quality. The results show that the small-size particles disperse more in the liquid steel. The gas flow rate is positively correlated with the settling displacement in this experimental range. The optimal gas flow rate is 4.1 m3 h−1, and the optimal immersion depth increases with increasing particle size. The results of the industrial trials also show that the quality of the steel treated with composite particles is significantly improved. The T·[O] content was reduced by 8.78 ppm. The inclusions number density was reduced by 3.55 pieces/mm2. The percentage of inclusions smaller than 3 μm was increased from 27.02% to 73.96%.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (51574019). The authors wish to express their gratitude to the foundation for providing financial support.

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Authors and Affiliations

  1. State Key Lab of Advanced Metallurgy, University of Science & Technology Bei**g, Bei**g, 100083, People’s Republic of China

    ** Bao & Chao Gu

  2. Anshan Iron & steel Group Company, Anshan, 114014, People’s Republic of China

    Chun-jie Wu, Wei Kang & Hong Li

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  1. **n Liu
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Correspondence to Yan-** Bao.

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Liu, X., Bao, Yp., Gu, C. et al. Simulation of Centimeter-Level Particle Motion Behavior in the Ruhrstahl–Heraeus Reactor Based on Situ Formation Micro-phase Molten Steel Purification Technology. JOM 75, 3724–3733 (2023). https://doi.org/10.1007/s11837-023-05943-y

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