Mathematical simulation of effect of nozzle  eccentricity on ladle teeming process

TANG Wen-dan; TANG Hai-yan

doi:10.13228/j.boyuan.issn0449-749x.20200525

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Iron and Steel ›› 2021, Vol. 56 ›› Issue (7) : 75-85. DOI: 10.13228/j.boyuan.issn0449-749x.20200525

Steelmaking

Mathematical simulation of effect of nozzle eccentricity on ladle teeming process

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Abstract

The nozzle eccentricity plays a significant role in the formation and development of the sink vortex at the end of ladle teeming. An optimized nozzle eccentricity based on the characteristics of a ladle can help to control the shape of a vortex, thus suppressing its harmful effects. However, relative research, especially on the details of how the nozzle eccentricity influences the flow field and the teeming process of a ladle, is still limited. A numerical simulation method was employed to study the flow field and the teeming process. "Influence degree" was proposed and used to quantitatively analyze the influence of nozzle eccentricity on fourteen physical parameters of the flow field and the teeming process, including nozzle flow rate, vortex angular velocity, turbulent kinetic energy, and nozzle gas content. The results show that there is a nonlinear relationship between the nozzle eccentricity and these physical parameters; the critical points of these physical parameters are different, ranging from 0.5 to 0.7; and the vortex stability and the inner surface of the container are two main influence factors of the critical point.

Key words

ladle / nozzle eccentricity / sink vortex / Coriolis force / VOF model

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TANG Wen-dan, TANG Hai-yan. Mathematical simulation of effect of nozzle eccentricity on ladle teeming process[J]. Iron and Steel, 2021, 56(7): 75-85 https://doi.org/10.13228/j.boyuan.issn0449-749x.20200525

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