钢包预热过程热应力影响因子及预报模型

Classification of thermomechanical impact factors and prediction model for ladle preheating

运用有限元软件ABAQUS建立钢包包衬的线性弹性模型,模拟钢包预热过程包衬的热应力,分析包衬厚度及其材料物理性能对包衬内最大热应力和钢壳表面温度的影响;采用偏最小二乘法建立包衬厚度及材料物理性能与包衬内最大热应力、钢壳表面温度间的预报模型。结果表明,工作衬材料物理性能对包衬最大应力和钢壳表面温度起主要影响作用;较之于无绝热衬,有绝热衬钢包永久衬材料物理性能对钢包热应力和钢壳表面温度的影响作用显著降低。

Linear elastic models were established by means of finite element code ABAQUS to simulate the thermomechanical behavior of steel ladle during preheating.The impact factors of ladle lining thickness and material properties on the maximum stress at steel ladle linings and end temperature at the steel shell were determined.Prediction models were built with partial least squares algorithm based on the above simulation results.The results show that the material properties of working lining plays a major role in the maximum compressive stress,maximum tensile stress and end temperature whether it includes an insulation or not.Compared with the ladle without an insulation,the importance of permanent lining to the maximum stress is reduced significantly by using the insulation.