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Interfacial Phenomena

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Modeling Multiphase Materials Processes

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Abstract

Foaming in steel refining processes and in bath smelting reduction processes adversely impacts the quality and productivity of steel. Suppression of foaming is, therefore, one of the key processes in the steelmaking industry. Foaming is known to be caused through the effect of CO gas generation from decarburization and to be suppressed by adding coke or coal to the upper slag layer, decreasing the viscosity of the slag, or increasing the surface tension of the slag [1,2,3,4,5]. In addition, a low-frequency sonic wave is considered to be effective for suppression of slag foaming [6]. Based on X-ray fluoroscopic observations, Ogawa et al. [7] found that the attachment of CO bubbles to a solid body of poor wettability is extremely effective for suppressing foaming. The CO bubbles attached to the body become larger due to coalescence and are pulled to the bath surface as a result of the increased buoyancy force acting on the bubbles. This result suggests that the attachment of bubbles to solid bodies of poor wettability may be useful for removing fine bubbles contained in molten metals. For example, the method would be applicable to the removal of fine argon bubbles from continuous casting molds and thus aid the production of clean steel by suppressing bubble-induced defects such as pinhole and sliver.

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Authors and Affiliations

  1. Graduate School of Engineering Division Materials Science & Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan

    Manabu Iguchi

  2. Department of Mechanical, Materials & Aerospace Engineering, University of Central Florida, Central Florida Blvd. 4000, Orlando, Fl, 32816, USA

    Olusegun J. Ilegbusi

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  1. Manabu Iguchi
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Correspondence to Manabu Iguchi .

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Iguchi, M., Ilegbusi, O.J. (2011). Interfacial Phenomena. In: Modeling Multiphase Materials Processes. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-7479-2_4

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  • DOI: https://doi.org/10.1007/978-1-4419-7479-2_4

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