电渣重熔结晶器复合传热模型

针对电渣重熔结晶器内钢锭(渣池)/渣皮/气隙/铜壁/冷却水体系中的复杂传热过程，根据钢锭和渣皮的热缩性、炉渣和气隙的分布等将结晶器传热现象分为5种模式，基于结晶器轴向温度梯度最大原则划定各传热模式间的界限.综合5种传热模式的传热方式建立关于钢锭(渣池)/渣皮/气隙/铜壁/冷却水界面间复合传热过程的统一数学模型.利用电渣重熔结晶器多点连续测温系统，将测得的温度值作为边界条件，得出电渣重熔系统中钢锭(渣池)/渣皮/气隙/铜壁/冷却水界面的温度和沿径向传递的热流量.利用计算的结果分析该复杂传热体系中5种传热模式径向温度变化的规律.

Complex Heat Transfer Model in an Electroslag Remelting Mold

In the view of the complex heat transfer procedure in the ingot (slag pool)/slag crust/air gap/mold wall/cooling water in an electroslag remelting crystallizer， the heat transfer of the crystallizer was defined 5 modes according to the thermal shrinkage of ingots and slag crust， the distribution of gap and slag， etc. The boundaries of the modes were divided based on the maximum axial temperature gradient. The integral mathematical model of the complex heat transfer procedure of the ingot (slag pool)/slag crust/air gap/mold wall/cooling water interface was established through integrated utilization of these five heat transfer modes. At the same time， the multi point continuous temperature measuring system was also developed. The measured temperature values were used as the boundary conditions， thus the temperature distribution of the ingot (slag pool)/slag crust/air gap/mold wall/cooling water interface and heat fluxes along the radial direction were solved. The regular pattern of the redial temperature variation in five heat transfer modes of this complex heat transfer system was analyzed by the simulation.