摘要
建立了以温度跟踪为目的的全氢罩式炉钢卷退火过程在线数学模型。采用二维轴对称非稳态导热方程描述钢卷内部传热,边界条件由气氛温度检测值给定。偏微分方程采用有限容积法离散,离散方程采用强隐型算法加速求解,在20s内能完成46个炉台的计算。埋偶试验验证了模型的合理性和准确性,冷热点温度的计算值与测量值偏差在4%左右。温度跟踪系统投入运行后,优化了保温时间,钢卷机械性能符合要求。
A on-line mathematical model for tracing coil temperature of the bell-type furnace is established based on the two-dimensional, axisymmetric, transient heat conduction equation. The boundary conditions are specified by the online atmosphere gas temperature. The partial differential equation is discretized by Finite Volume Method （FVM）. The strongly implicit procedure is employed to solve the resulting algebraic equations. The solution process of 46 annealing bases is completed within 20 secs. The buried thermocouple test is conducted to verify the accuracy and reliability of the on-line model. The measured data are compared with the calculated values and derivations observed within 4 %. The practical application shows that the proposed modal can optimize the soaking time and ensure good mechanical behavior of the product.
出处
《矿冶》
CAS
2009年第1期36-39,共4页
Mining And Metallurgy
关键词
数学模型
罩式炉
温度跟踪
钢卷退火
mathematical model
bell-type furnace
temperature tracing
coil annealing
