Heat-transfer and solidification model of continuous slab casting: CON1D |
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Authors: | Ya Meng Brian G Thomas |
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Affiliation: | (1) Department of Materials Science and Engineering, the University of Illinois at Urbana-Champaign, 61801 Urbana, Il;(2) Department of Mechanical and Industrial Engineering, the University of Illinois at Urbana-Champaign, 61801 Urbana, IL |
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Abstract: | A simple, but comprehensive model of heat transfer and solidification of the continuous casting of steel slabs is described,
including phenomena in the mold and spray regions. The model includes a one-dimensional (1-D) transient finite-difference
calculation of heat conduction within the solidifying steel shell coupled with two-dimensional (2-D) steady-state heat conduction
within the mold wall. The model features a detailed treatment of the interfacial gap between the shell and mold, including
mass and momentum balances on the solid and liquid interfacial slag layers, and the effect of oscillation marks. The model
predicts the shell thickness, temperature distributions in the mold and shell, thickness of the resolidified and liquid powder
layers, heat-flux profiles down the wide and narrow faces, mold water temperature rise, ideal taper of the mold walls, and
other related phenomena. The important effect of the nonuniform distribution of superheat is incorporated using the results
from previous three-dimensional (3-D) turbulent fluid-flow calculations within the liquid pool. The FORTRAN program CONID
has a user-friendly interface and executes in less than 1 minute on a personal computer. Calibration of the model with several
different experimental measurements on operating slab casters is presented along with several example applications. In particular,
the model demonstrates that the increase in heat flux throughout the mold at higher casting speeds is caused by two combined
effects: a thinner interfacial gap near the top of the mold and a thinner shell toward the bottom. This modeling tool can
be applied to a wide range of practical problems in continuous casters. |
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