板栅连铸结晶器传热模型分析

Study on heat transfer model of grid continuous casting mold

传热过程决定着板栅连铸结晶器能否连续稳定地生产出合格质量的连铸板栅,根据热力学第一定律和傅里叶定律(热传导定律)对板栅连铸结晶器的热量传递进行了研究。依据板栅连铸结晶器实际结构简化模型,分别建立了冷却油、端盖以及空气稳态复合传热模型,高温铅液、连铸动模外筒以及冷却油的稳态复合传热模型,连铸动模内部冷却油的放热计算模型,进而建立了板栅连铸结晶器传热动态平衡方程;为了指导生产实际,建立了运行过程操作函数。通过板栅连铸结晶器传热过程的分析研究,对提高板栅连铸的连续稳定生产并实现板栅连铸结晶器的全自动温度控制具有一定的指导意义。

Heat transfer process of continuous casting grids mold determines the acceptable quality of continuous casting grids.The heat transfer in continuous casting grids mold on the basis of the first law of thermodynamics and the Fourier law(the law of heat conduction)was analyzed and studied.According to simplified model of continuous casting grids mold established the steady-state compound heat transfer model of the cooling oil end cover air,the high temperature lead liquid and the outer cylinder of the moving mold and the cooling oil and the heat release calculation model of the cooling oil.Then the heat transfer dynamic balance equation of continuous casting mold was established.In order to guide the production practice,the operation function of operation process is established.Through the theoretical analysis of the heat transfer process of the grid continuous casting mold,this study has certain guiding significance for improving the continuous and stable production of the grid continuous casting mold and realizing the automatic temperature control of the grid continuous casting mold.