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依据CSP连铸工艺中结晶器内钢液凝固、二冷区内铸坯与喷淋水和轧辊及空冷区内铸坯的传热特点,采用了(1)符合实际的等效比热模型;(2)实物模型实验的二冷区冷却公式;(3)能表达结晶与坯壳表面气隙传热的等效导热系数,建立了能真实反映连铸热过程中铸坯温度数字化的数学模型.通过对模型的求解,计算分析了铸坯温度坯壳厚度随连铸过程的变化规律,模型的应用对提高产品质量、优化生产工艺有一定的实际意义.
According to the solidification of liquid steel in the mold during CSP continuous casting process and the heat transfer characteristics of billets and spray water in the second cooling zone and the billets in the nacelle and air cooling zone, (1) the equivalent specific heat model is adopted; (2) the cooling model of the second cooling zone in the physical model experiment; (3) the equivalent thermal conductivity of the air gap heat transfer between the crystal and the surface of the shell can be expressed; and the mathematical model that can truly reflect the temperature of the billet during the continuous casting Through the solution of the model, the variation law of the thickness of the blank shell temperature with the continuous casting process is calculated and calculated, and the application of the model has certain practical significance for improving the product quality and optimizing the production technology.