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Prediction of liquid circulation flow rate in RH degasser: improvement of decarburization at low atmospheric pressure

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Abstract

The two-fluid model coupled with population balance model was used for simulating the gas–liquid flow in the Ruhrstahl–Heraeus (RH) degasser. The predicted circulation flow rate was compared with that measured from a water model experiment to validate the mathematical model. Then, influence of snorkel immersion depth on liquid circulation flow rate was numerically investigated under an atmospheric pressure of 101 and 84 kPa, respectively. Predicted result indicates that the circulation flow rate of the RH degasser in the high-altitude area was severely reduced because of the decrease in atmospheric pressure. However, increasing the snorkel immersion depth from 0.5 to 0.7 m can compensate for the decrease in atmospheric pressure. Industrial test result indicates that decarburization rate is significantly enhanced by increasing the snorkel immersion depth. Through optimization, the percentage of heats with a final carbon content less than 0.002 wt.% is significantly increased from 22.0% to 96.4%.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 52104321), the Natural Science Foundation of Chongqing, China (Grant No. CSTB2023NSCQ-MSX0871), and the Science and Technology Research Program of Chongqing Municipal Education Commission (Grant No. KJQN202101404).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Yangtze Normal University, Chongqing, 400044, China

    Gu-jun Chen

  2. College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China

    Sheng-ping He

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Correspondence to Sheng-ping He.

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Chen, Gj., He, Sp. Prediction of liquid circulation flow rate in RH degasser: improvement of decarburization at low atmospheric pressure. J. Iron Steel Res. Int. (2024). https://doi.org/10.1007/s42243-023-01166-2

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  • DOI: https://doi.org/10.1007/s42243-023-01166-2

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