Physical Simulation of Inclusions Removal in 180t RH Degasser

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Abstract:

As one of the important refining equipments between steelmaking and continuous casting, RH vacuum refining plays an important role in removing the inclusions in the molten steel.RH can improve steel quality largely and meet the demand of mass production of high additional value. On the base of the similarity principle, a water model was developed to study the influence factors of inclusion removal in the molten steel of 180 tons RH vacuum refining device.Liquid steel is simulated by Nacl solution, the air is approximate argon, polypropylene simulate inclusions and NaHCO3 simulate composite particles. The influence regularity of lift gas flow rate, submersion depth of snorkels and the input amount of NaHCO3 on the inclusions removal rate have been discussed and the optimal values for each influence factor have been found.

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Periodical:

Advanced Materials Research (Volumes 750-752)

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375-379

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Online since:

August 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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[1] L. Holappa: On Physico-Chemical and Technical Limits in Clean Steel Production. Steel research int. 81(2010)No. 10, 869-874.

DOI: 10.1002/srin.201000203

Google Scholar

[2] S. Abdelaziz,G. Megahed,I. El-Mahallawi and H. Ahmed: Control of Ca addition for Improved Cleanness of Low C, Al killed Steel. Ironmaking and Steelmaking Vol. 36(2009)432-441.

DOI: 10.1179/174328109x401578

Google Scholar

[3] A.W. Cramb: Inclusion Formation and Removal. AFS, August 1998, available at: http: /neon. mems. cmu. edu/afs/afs2/form. html.

Google Scholar

[4] R. Dekkers: Non-metallic Inclusions in Liquid Steel. at: http: /www. mtm. kuleuven. ac. be.

Google Scholar

[5] L.F. Zhang and B.G. Thomas: Proc. 7th European Electric SteelmakingConf., Venice, Italy, May2002, AIM, 277-286.

Google Scholar

[6] Lee T, Kim H J, Kang B Y, H wang S K. Effect of Inclusion Size on the Nucleation of Acicular Ferrite in Welds [J]. ISIJ International, 2000, 40: 1260.

DOI: 10.2355/isijinternational.40.1260

Google Scholar

[7] Yin H, Shibata H, Emi T, et al. Characteristics on Molten Steel of Agglomeration Surface of Various Inclusion Praticles [J] . ISIJ International, 1997, 37(10): 946.

DOI: 10.2355/isijinternational.37.946

Google Scholar

[8] Bai-song Liu, Guo-sen Zhu, Huan-xi Li: Decarburization Rate of RH Refining for Ultra Low Carbon Steel. International Journal of Minerals, Metallurgy and Materials Volume17, Number1, February 2010, Page22.

DOI: 10.1007/s12613-010-0104-3

Google Scholar

[9] C.J. Treadgold. Behaviour of Inclusion in RH Vacuum Degasser, Ironmaking and Steelmaking, 2003, 30(2): 120-124.

DOI: 10.1179/030192303225001685

Google Scholar

[10] K. Yamaguchi,Y. Kishimoto,T. Sakuraya, et al., Effect of Refining Conditions for Ultra Low Carbon Steel on Decarburization Reaction in RH Degasser, ISIJ Int., 32(1992), No. 1, 126.

DOI: 10.2355/isijinternational.32.126

Google Scholar