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Simulation on Decarburization and Inclusion Removal Process in the Ruhrstahl–Heraeus (RH) Process with Ladle Bottom Blowing

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Abstract

To enhance the refining efficiency of the Ruhrstahl–Heraeus (RH) process, the ladle bottom blowing was employed in RH degasser and a numerical method was employed to investigate the decarburization and inclusion removal in RH with ladle bottom blowing. The results showed that the decarburization rate in RH with ladle bottom blowing is greater than that in traditional RH. The larger mass fraction of carbon at the recirculation zone under up snorkel disappears because of the gas bubbles from ladle bottom blowing in an RH degasser. For RH with ladle bottom blowing, the decarburization at argon bubble surface accounts for the majority of the removed carbon, and it is approximately two times greater than that in the inner site of the vacuum chamber. Besides, the inclusion removal rate in RH with ladle bottom blowing is greater than that in traditional RH, and the maximum inclusion characteristic radius is much less in RH with ladle bottom blowing than that in traditional RH. Besides, the accumulation of inclusions in ladle between sidewall and up snorkel and the recirculation zone under up snorkel, which can be found in traditional RH, disappears in RH with ladle bottom blowing. For RH with ladle bottom blowing, the average number density of inclusions decreases more drastically than that in traditional RH and the average terminal number density of inclusions is much smaller than that in traditional RH.

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Acknowledgments

This work was supported by 111 Project (B07015), the National Natural Science Foundation of China (51304038 and 51376040), the Natural Science Foundation of China and Shanghai Baoteel (U1460108), the China Postdoctoral Science Foundation (2013M530130), the Research Fund for the Doctoral Program of Higher Education of China (20130042120015), the Fundamental Research Funds for the Central Universities (N130409004 and N140902001), the Postdoctoral Science Foundation of Northeastern University, Liaoning BaiQianWan Talents Program (2013921073), and Open Funds of the State Key Laboratory of Advanced Metallurgy at the University of Science and Technology of Beijing (KF13-10)

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Authors and Affiliations

  1. Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, 110004, P.R. China

    Dian-Qiao Geng (Lecturer), Kai Wang (Associate Professor), Ping Wang (Professor), Ru-Quan Liang (Professor), Hong Lei (Professor) & Ji-Cheng He (Professor)

  2. Department of Metallurgy Engineering, Shandong Vocational College of Industry, Zibo, 256414, P.R. China

    Jin-Xing Zheng (Professor)

  3. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang, 110819, P.R. China

    Hai-Tao Liu (Associate Professor)

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  1. Dian-Qiao Geng
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  2. Jin-Xing Zheng
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  3. Kai Wang
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  7. Hong Lei
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  8. Ji-Cheng He
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Correspondence to Dian-Qiao Geng.

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Manuscript submitted July 17, 2014.

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Geng, DQ., Zheng, JX., Wang, K. et al. Simulation on Decarburization and Inclusion Removal Process in the Ruhrstahl–Heraeus (RH) Process with Ladle Bottom Blowing. Metall Mater Trans B 46, 1484–1493 (2015). https://doi.org/10.1007/s11663-015-0314-1

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