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建立了板坯连铸结晶器内流动、传热和凝固耦合的数学模型,分析了在有无电磁制动下,结晶器内钢液流动、温度分布及凝固坯壳厚度的变化情况.结果表明,在电磁制动的作用下,从浸入式水口流出的钢液速度得到了抑制,引入电磁场能减小射流冲击深度,有利于稳定和减少钢液面波动和促进凝固坯壳的生长,拉速为1.1m/min时,结晶器出口处凝固坯壳厚度增加约2mm.
The mathematical model of flow, heat transfer and solidification coupling in slab continuous casting mold was established, and the change of molten steel flow, temperature distribution and solidified shell thickness in the mold with or without electromagnetic brake was analyzed. , Under the action of electromagnetic brake, the velocity of molten steel flowing out from the submerged entry nozzle is suppressed. The introduction of electromagnetic field can reduce the jet impact depth, which is conducive to stabilizing and reducing the fluctuation of molten steel surface and promoting the growth of solidified shell. At 1.1 m / min, the thickness of the solidified shell at the exit of the crystalliser increased by about 2 mm.