Water Model on Fine Inclusion Removal by Bubble Flotation in RH Refining Process

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With the development of socio-economic and science and technology, People are more strict to the requirement of steel quality. A physical model was established according to the “similarity theory” to simulate the real 180t RH-TB vacuum refining device. Liquid steel is simulated by Nacl solution, Fine inclusions is simulated by high density polypropylene less than 0.04mm in diameter. The influence regularity of treatment time, lift gas flow rate and method of addition, the amount and time of NaHCO3 addition on the inclusions removal rate have been discussed, the optimal values for each influence factor have been found and can be used in optimizing the refining technology.

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107-111

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February 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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[1] Yan Wang: Inclusion Evolution in Molten and Solidifying Steel (2003).

Google Scholar

[2] J. Cheng, R. Eriksson and P. Jonsson, Determination of Macroinclusions during Clean Steel Production, Ironmaking and Steelmaking. Vol. 30 (2003) 66-72.

DOI: 10.1179/03019230325009470

Google Scholar

[3] Mats Soder, Growth and Removal of Inclusions During Ladle Stirring, Sweden 2001, Reference to a Licentiate Thesis.

Google Scholar

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

Google Scholar

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

Google Scholar

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

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

DOI: 10.2355/isijinternational.40.1260

Google Scholar

[9] Fu-ping Tang, Zhen Li, Xiao-feng Wang, Ben-wen Chen and Peng Fei, Cleaning IF molten steel with dispersed in-situ heterophases induced by the composite sphere explosive reaction in RH ladles, International Journal of Minerals, Metallurgy and Materials, Volume 18, Number 2, April 2011, page 144.

DOI: 10.1007/s12613-011-0414-0

Google Scholar

[10] 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