Intermixing Model of Continuous Casting during a Grade Transition
Xiaoqing Huang,Brian G. Thomas +1 more
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TLDR
In this article, an efficient, accurate, and user-friendly computational model has been developed to investigate the composition distribution that develops in continuously cast steel during a grade change, which is fully transient and consists of three submodels, which account for mixing in the tundish, mixing in liquid core of the strand, and solidification.Abstract:
To investigate the composition distribution that develops in continuously cast steel during a grade change, an efficient, accurate, and user-friendly computational model has been developed. The model is fully transient and consists of three submodels, which account for mixing in the tundish, mixing in the liquid core of the strand, and solidification. The first submodel of mixing in the tundish consists of two plug flow zones, two back-mixing boxes, and two dead volumes. The second submodel solves a one-dimensional (1-D) diffusion equation in series with two back-mixing boxes to calculate concentration histories in the strand, and the third submodel transforms these histories into slab compositions. The model was calibrated using both concentration histories measured on tundish water models and calculations from a three-dimensional (3-D) model. It was then verified with several sets of composition measurements along the surface and centerlines of slabs. The model is capable of tracking mixing phenomena for arbitrary tundish filling and casting speed histories. It has been used to compare the effects of different grade change procedures on the amount of intermixed steel, including standard sequence casting, flying tundish change, and insertion of grade separators. Mixing in the strand was found to be very important. Without a grade separator, a flying tundish change had very little benefit on reduced intermixing, for the typical conditions considered.read more
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References
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Journal ArticleDOI
Modeling superheat removal during continuous casting of steel slabs
TL;DR: In this paper, a 3D model was developed to compute fluid flow velocities, temperature distribution within the liquid pool, heat transfer to the inside of the solidifying shell, and its effect on growth of the shell.
Journal ArticleDOI
Modeling of steel grade transition in continuous slab casting processes
X. Huang,Brian G. Thomas +1 more
TL;DR: In this paper, the axial transport of solute due to turbulent eddy motion was found to be many orders of magnitude greater than molecular diffusion and thus dominated the resulting composition distribution.
Journal ArticleDOI
Study Of Fluid-Flow And Residence-Time Distribution In A Continuous Slab Casting Mold
TL;DR: In this paper, the fluid flow pattern and residence-time distribution of a continuous casting mold have been studied using a water model, and the effect of casting speed, discharge port diameter, shroud well depth and the immersion depth on r.t.
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