圆坯连铸用保护渣热状态的数值计算及其可视化  

Numerical Calculation of Thermal State of Mould Powder for Round Billet Continuous Casting and Its Visualization

作　　者：姚曼[1] 杨利敏[1] 尹合壁[1] 

机构地区：[1]大连理工大学材料工程系,辽宁大连116024

出　　处：《钢铁研究学报》2006年第4期21-25,28,共6页Journal of Iron and Steel Research

基　　金：教育部科学技术研究重点资助项目(03051)

摘　　要：根据传热学原理,采用有限差分法对圆坯连铸弯月面上保护渣的热状态进行了数值计算。计算结果较好地预测了弯月面上液渣与固态渣层的温度及厚度分布,并以此研究了保护渣的物理性能和相关的工艺参数对保护渣各层厚度的影响。为准确计算结晶器与铸坯间渣膜的厚度,在计算温度场的同时通过引入修正的经验公式,对渣膜厚度进行初步计算,并将其对径向热流的影响反作用于温度场,反复迭代,最终得到与实测温度数据和文献提供的渣膜厚度数据一致的计算结果,证明此方法简易可行。最后实现了铸坯/结晶器及渣层热状态的可视化。Based on the heat transfer theory, numerical calculation of thermal distribution of mould powder on the meniscus was conducted by employing the finite difference method. The results could be well used to forecast the temperature and thickness distributions of molten and solid flux layers. Based on the above computation, effect of mould powder＇s physical properties and related continuous casting technical parameters on the temperature and thickness distribution was discussed. In order to calculate the exact thickness of slag film between the mould and round billet, a modified empirical formula was introduced when temperature field was calculated. The thickness results of slag film were based on the billet temperature field which was affected by the radial heat flux of billet. So the computation was reiterated until the temperature field data agreed with the measured values and the published results. Finally visualization of the thermal distribution of billet, mould and mould powder was realized.

关 键 词：圆坯 连铸 保护渣 数值模拟 可视化 

分 类 号：TF777[冶金工程—钢铁冶金]