Numerical characterisation and experimental validation of AusIron top submerged multi-injection system

Author： El-katatny I. Morsi Y. S. Yang W.

ISSN： 1743-2812

Source： Ironmaking & Steelmaking, Vol.35, Iss.2, 2008-02, pp. : 91-98

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Abstract

The present paper presents a numerical study of the fluid flow structure inside an elliptical liquid bath, agitated by a top submerged gas injection system. Using the Eulerian–Eulerian approach, a three-dimension gas–liquid transient numerical model coupled with the standard k-ε model is developed. Various combinations of operating parameters are investigated and the numerical predictions are validated against the laser doppler anemometer (LDA) experimental data. The results indicate that at a higher gas flowrate a better mixing at the bottom of the bath is achieved. On the effect of the lance submergence a deeper submergence level gives highly improved agitation and mixing within the bath. The comparisons of the numerical predictions with experimental data under various operating conditions show a reasonable agreement for both mean velocity and turbulent fluid flow characteristics. Furthermore, the development of a new empirical correlation based on Froude number is presented.