The Prediction of Gas Residence Times in Foaming CaO-SiO_2-FeO Slags

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著者

    • HAYES Peter c.
    • Department of Mining, Minerals and Materials Engineering, The University of Queensland
    • LEE Hae-geon
    • Department of Materials Science and Metallurgical Engineering, Pohang University of Science and Technology

抄録

A dynamic, non-equilibrium model of foaming:<br><br>Σ=1×10<sup>6</sup>(<sub>(<I>pg</I>)<sup>2</sup><I>d</I><sup>3</sup></sub> <sup>μ·<I>E</I><sub>eff</sub></sup>)<br><br>which relates the residence times of gas bubbles in foams (Σ) to the viscosity of the liquid phase (μ); the effective elasticity (<I>E</I><sub>eff</sub>) resulting from the dynamic adsorption of surface active species; the liquid phase density (ρ); and the mean bubble diameter (<I>d</I> ); has been applied to foaming in the CaO–SiO<sub>2</sub>–FeO system at 1823 K.<br> In agreement with industrial observations, the model shows a transition from a foaming regime to a non-foaming regime as the slag basicity increase above 1.5. This is due to poor surface elasticity resulting from the negligible adsorption of silica in this region.

収録刊行物

  • ISIJ international

    ISIJ international 38(11), 1216-1224, 1998-11-15

    The Iron and Steel Institute of Japan

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