Abstract
A mathematical model of simulating the heat transfer behavior of carbon steel solidifying in slab continuous casting mold was developed coupled with heat transfer media dynamic distribution behavior in shell/mold gap, such as liquid flux, solid flux, air gap, as well as mold/solid flux interfacial contact thermal resistance. The evolution characteristics of the distributions of mold flux, air gap formation, as well as the shell temperature field of carbon steel solidifying in a slab mold were described. Based on these, a new mechanism of shell hot spots formation in slab mold was proposed. The formation for shell wide face off-comer hot spot at mold upper and middle parts results from the thick mold flux film filling in shell/mold gap, while the lower part results from the thick air gap formation, and that of the narrow face just results from the thick mold flux film filling in the gap.
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