钢坯温度预示数学模型采用总括热吸收率法,提高了计算速度;模型引用了拉格朗日插值算法,提高了计算精度。研究出的数学模型满足在线控制要求。在钢坯氧化模型中,利用氧化实验数据,采用试错法确定了钢坯氧化的动力学常数。笔者提出的这一方法简便、精确、实用。本文还应用热平衡原理确定了炉内温度场,这种方法为加热炉计算机仿真、确定加热炉的优化操作参数创造了条件。 The mathematical model of billet temperature predicting adopts the holistic heat absorption rate method to improve the calculation speed. The model references the Lagrange interpolation algorithm to improve the calculation precision. The mathematical model developed satisfies the online control requirements. In the billet oxidation model, using the experimental data of oxidation, the kinetic constants of the oxidation of billet were determined by trial and error method. The author proposed this method is simple, accurate and practical. In this paper, the heat balance principle is also used to determine the temperature field in the furnace. This method creates the conditions for the computer simulation of the furnace and the determination of the optimum operating parameters of the furnace.