通过建立高炉铸铁冷却壁的三维传热模型，应用渣皮熔化迭代方法分析冷却壁温度场，确定不同条件下冷却壁的极限热负荷，讨论了高炉冷却壁的结构和冷却工艺对极限热负荷的影响。结果表明，冷却水速度（2～4 m/s）对极限热负荷影响较小，水管与壁体间的气隙降低了铸铁冷却壁冷却能力；冷却水管直径由48 mm增加到70 mm，可以使极限热负荷提高45%。
A threedimensional mathematical model of heat transfer in cast iron stave was developed. The model is used to analyze the temperature field of stave with iterative calculation for slag skull melting. The heat load limit of blast furnace stave was found under different conditions. The influence of the stave structure and cooling conditions on heat load limit is discussed. The results show that the water rate from 2 m/s to 4 m/s had a small effect on heat load limit.The gap between water pipe and iron block decreases the cooling ability of cast iron stave. By increasing water pipe diameter from 48 mm to 70 mm，the heat load limit was increased by 45%.
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