高炉炉缸炉底侵蚀预测数值模拟

Numerical simulation of hearth and bottom erosion prediction in blast furnace

基于3 200 m3高炉炉缸炉底设计及生产过程中侵蚀的实际情况,利用ANSYS软件,从传热学的角度出发,建立了高炉炉缸炉底侵蚀二维物理模型,通过数值模拟的方法,研究该高炉从开炉初期、中期、中后期、后期高炉炉缸炉底温度场分布。模拟计算表明,1 150℃侵蚀线位于铁口下方区域和炉缸炉底交界处,但无明显"象脚状"侵蚀。对比高炉不同服役时期温度场和1 150℃侵蚀线分布,分析导致其变化的原因,同时对影响高炉炉缸内衬温度的若干因素进行探讨。

According to the design and erosion conditions of hearth and bottom of a blast furnace with effec-tive volume of 3 200 m3, a twodimensional mathematical model is developed by using the theory of heattransfer with ANSYS to monitor the erosion state of hearth and bottom in blast furnace. The temperature fielddistribution of hearth and bottom is obtained at different stages of service, including early state, middle state,mid to late state and late state. The calculated erosion graph indicates that the erosion line at 1 150 ℃ is locat-ed under the iron notch and at the comer of the hearth and bottom, and the ＂elephant foot wear＂ is not obvi-ous. Comparing with the different situations of the temperature distribution and the location of the erosion lineat 1 150℃, the reasons for the changes are analyzed, and the influencing factors for hearth lining tempera-ture are discussed.