蓄热式钢包烘烤的数值模拟

Numerical Simulation of Regenerative Ladle Baking

为了对钢包的烘烤温度进行在线预测,笔者耦合了流体流动、燃烧和换热过程,建立了多入口、多出口的三维非稳态钢包烘烤数学模型。利用计算流体力学软件 CFX4 3,采用有限差分方法和修正的速度 压力耦合算法SIMPLEC,计算了某厂蓄热式钢包内衬的温度分布,重点分析了不同气体预热温度下钢包内衬温度的变化规律,并进行了实验验证。结果表明,采用助燃空气 煤气双预热的蓄热式燃烧技术能够有效地提高钢包的烘烤速度和加热均匀性;气体预热温度越高,包衬终点温度越高,温度均匀性也越好。计算结果与实验及工程现象基本吻合,证明该模型对指导现场生产具有重要意义。

In order to realize the on-line prediction the baking temperature of ladle lining, and to study its temperature uniformity, a 3-D transient mathematical model with multi-inlet and multi-outlet of ladle heating facility facilities was built. Using CFX4.3 code with finite difference and SIMPLEC methods, the temperature distribution of ladle lining baked at different preheating temperature of combustion gas was studied numerically and experimentally. The results indicate that the regenerative ladle baking with high temperature air combustion techniquecan speed up ladle heating rate and increase the temperature uniformity of lining. The calculated results agree with the experimental observation and this model can be used to guide the on-site production.