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根据宽厚板坯结晶器内初凝坯壳动态热收缩所确定的渣道宽度、保护渣的液-固状态及厚度分布、铸坯表面和铜板热面的温度分布,以及气隙厚度的动态变化等,建立了结晶器渣道热流计算模型,并在此基础上,通过将该模型嵌入至结合结晶器铜板分析的坯壳凝固过程二维瞬态热/力耦合有限元分析模型,研究分析了国内某钢厂实际宽厚板坯连铸工况下,结晶器内某碳钢凝固过程中结晶器渣道内气隙、保护渣厚度分布,以及热流变化的规律。
According to the dynamic shrinkage of the initial solidified shell in the wide slab mold, the width of the slag path, the liquid-solid state and thickness distribution of the flux, the temperature distribution of the slab surface and the hot surface of the copper plate, and the dynamic changes of the air gap thickness Based on this model, the model is embedded into the two-dimensional transient thermal / mechanical coupled FEA model of the solidified shell during the solidification process of copper mold, Under the condition of the actual wide slab continuous casting in a domestic steel mill, the air gap, mold thickness distribution and the rule of heat flux in the crystallizer slag passage during the solidification of a carbon steel in the mold are studied.