CSP辊底加热炉供煤气量随坯厚、坯温变化规律的模拟研究

Simulation Study on Change of Gas Supply With Slab Thickness and Temperature for Roller Hearth Reheating Furnace of CSP Line

研究了CSP辊底加热炉内的传热过程及其规律。采用数值模拟的方法,在进行合理简化后,建立总能量平衡基础上的炉内热过程数学模型,其中辐射传递方程的求解采用离散坐标法。自主开发了该炉型的通用热过程模拟软件,采集包钢CSP薄板坯连铸连轧厂的生产数据进行验证计算,计算所得钢坯温度与实际温度的相对误差小于1%,表明该模型假设合理,建模正确;该软件能够应用于该类型加热炉的设计、管理和研究等领域,为确定CSP生产线高拉速(提高入炉坯温)、多钢种的生产工艺参数创造了条件。

The mathematical model for heat transfer in the roller hearth reheating furnace was studied. A new simplified mathematical model has been established based on the balance of total energy with radiative heat transfer equation solved by discrete ordinates method. The universal software for simulating the thermal process of the furnace has been developed. Its rationality and validity is approved by the production data of CSP（compact strip production） in Baogang,and the relative error of calculated comparing with actual slab temperature was less than 1%. The model can be used in designing, management and research for such heating furnace, and it can also help to determine parameters for high speed casting of different steel grades.