Cold model experiments of gas removal from molten metal by an irradiation of ultrasonic waves

Masaki Kobayashi, Chizuna Kamata, Kimihisa Ito

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    Application of the technique of removing dissolved gas by irradiating of ultrasonic waves on a molten metal system was discussed. In water model experiments, dissolved gas can be removed by "rectified diffusion" and the apparent removal rate constant increases linearly with the input power. The addition of non-wettable particles to the bath enhances the degassing. A mathematical model of rectified diffusion suggests that it would be difficult to apply the technique to the gas removal in practical steelmaking processes, where the gas concentration must be controlled to a ppm level. However, since Al2O3 and SiO2 are non-wettable to molten iron, it is promising that small inclusions can be removed by the bubbles generated by ultrasonic waves in a molten iron system.

    Original languageEnglish
    Pages (from-to)9-15
    Number of pages7
    JournalISIJ International
    Volume37
    Issue number1
    Publication statusPublished - 1997

    Fingerprint

    Ultrasonic waves
    Liquid metals
    Gases
    Irradiation
    Molten materials
    Iron
    Experiments
    Degassing
    Steelmaking
    Bubbles (in fluids)
    Rate constants
    Mathematical models
    Water

    Keywords

    • Cavitation
    • Gas removal
    • Inclusion removal
    • Rectified diffusion
    • Refining
    • Steelmaking
    • Ultrasonic waves

    ASJC Scopus subject areas

    • Metals and Alloys

    Cite this

    Cold model experiments of gas removal from molten metal by an irradiation of ultrasonic waves. / Kobayashi, Masaki; Kamata, Chizuna; Ito, Kimihisa.

    In: ISIJ International, Vol. 37, No. 1, 1997, p. 9-15.

    Research output: Contribution to journalArticle

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