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根据2500m~3高炉炉身第9段球墨铸铁冷却壁解剖结果和ABAQUS有限元分析软件热应力计算结果,分析了第9段冷却壁破损的原因。炉身第9段冷却壁破损严重主要是由冷却壁热应力引起的。冷却壁的抗拉强度、伸长率和组织形态不达标,造成冷却壁更易发生断裂。冷却水管内表面因铸造过程中的氧化和冷却水中溶解氧的腐蚀而产生的锈层,也阻碍了冷却系统的传热。
According to the anatomical results of the ninth section ductile iron cooling stave of 2500m ~ 3 blast furnace shaft and the thermal stress calculation results of ABAQUS finite element analysis software, the reason of the ninth stave cooling wall damage was analyzed. Section 9 of the shaft wall is severely damaged by stave mainly caused by thermal stress on the stave. Stave wall tensile strength, elongation and morphology of non-compliance, resulting in more prone to fracture cooling stave. The rust layer on the inner surface of the cooling pipe due to the oxidation in the casting process and the dissolved oxygen in the cooling water also hinders the heat transfer of the cooling system.