铜钢复合冷却壁热力耦合分析

Thermal-mechanical Coupled Analysis for Copper-steel Cooling Stave

采用ANSYS建立铜钢复合冷却壁的传热和热应力模型,分析稳定挂渣及渣皮脱落后的温度和热应力分布。结果表明,炉气温度是影响壁体温度、渣皮厚度、热负荷和应力状态的主要因素。在稳定挂渣时,铜壁最高温度为124℃,热负荷81.1 kW/m2,变形量比铜质冷却壁有所减少。在渣皮脱落后,铜壁温度和应力快速上升,5 m in后趋向稳定。在冷却壁裸露的情况下,铜壁和钢板之间仍然保持牢固结合。

The heat transfer and thermal stress model for copper-steel colling stave is established by ANSYS. The temperature and thermal stress distribution of the stave is analyzed when the slag skull is steady and after the slag skull drops off. The result shows that gas temperature is the main factor that affects stave temperature and slag skull thickness and heat load and stress distribution. In the steady condition, the maximum of temperature on the copper plate is 124 ℃ and the heat load is 81.1 kW/m^2. The distortion is smaller than copper stave. After the slag skull drops off, temperature and stress on the copper plate increase rapidly. The temperature and stress state trend to stability when slag-drop time is 5 minutes. The copper plate and steel plate are combined firmly each other in the slag-drop state.