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Numerical Simulation of Heat Transfer and Scale Formation in a Reheat Furnace
Author(s) -
Liu Xiang,
Worl Bethany,
Tang Guangwu,
Silaen Armin K.,
Cox Jeffrey,
Johnson Kurt,
Bodnar Rick,
Zhou Chenn Q.
Publication year - 2019
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201800385
Subject(s) - slab , scale (ratio) , heat transfer , mechanics , oxidizing agent , materials science , computational fluid dynamics , diffusion , computer simulation , thermodynamics , metallurgy , chemistry , engineering , structural engineering , physics , organic chemistry , quantum mechanics
In steel rolling mills, reheat furnaces are used to reheat slabs to high temperatures in a highly oxidizing environment; this results in the formation of iron oxide scale on the slab surface. Scale formation poses an ongoing material and economic loss to industry and should be minimized where feasible. The kinetics of scale growth are complex and still not fully understood. Previous studies that modeled scale formation with mathematical methods are limited to simple case studies. Here, computational fluid dynamics (CFD) is used to simulate slab reheat furnace operations and to investigate complicated physical phenomenon. This paper proposes a new numerical method to model scale growth under varying conditions/characteristics including temperature, gas atmosphere composition, and steel grade. This method uses a mixed linear‐parabolic equation to model both the initial surface reaction (and scale formation) and the subsequent solid‐state ion diffusion through the developed scale. This model can be used to predict the amount of scale that will form on a slab under certain conditions. Model predictions were found to be consistent with experimental data.