共查询到15条相似文献,搜索用时 265 毫秒
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提高高炉炉腰及炉身下部冷却壁抗热变形能力是维持高炉长寿的关键.采用热态实验和数值模拟手段研究高炉炉腰及炉身下部区域铜钢复合冷却壁的传热及热变形行为,并与铜冷却壁进行对比分析.铜钢复合冷却壁热面无渣铁壳覆盖,煤气温度1200℃条件下,铜钢复合冷却壁最高温度为180℃,传热性能与铜冷却壁接近.铜钢界面最大等效应力约为114.45 MPa,低于铜钢复合板的抗拉强度.铜钢复合冷却壁发生弯曲变形,中心z向位移为0.66 mm,较铜冷却壁低约25.8%;顶底端沿z向位移为0.13 mm,较铜冷却壁低约50%;曲率为0.93×10-4 mm-1,较铜冷却壁低约51.81%.铜钢复合冷却壁抗变形能力优于铜冷却壁,可以避免铜冷却壁热变形过大导致的螺栓及冷却水管断裂破损问题. 相似文献
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针对高炉炉墙结构复杂,铜冷却壁热面工况难以直接检测的问题,采用有限元分析技术,建立高炉炉腰下部区域炉墙三维稳态传热模型,并对不同工况下炉墙温度场分布进行仿真。通过结合仿真结果和现场可检测数据,不断修正热面边界条件,推算出铜冷却壁热面挂渣厚度,为高炉操作提供必要的信息和可靠的指导。 相似文献
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《钢铁冶炼》2013,40(3):179-182
AbstractThe operating conditions of cast steel staves at Masteel blast furnace have been simulated to generate the temperature distribution under different operating conditions. The influence of the temperature and velocity of cooling water as well as the gas temperature of blast furnace on the temperature distribution of the cast steel stave was obtained. The main cause of stave damage is discussed. The result shows that cast steel staves possess better heat transfer ability and a lower temperature distribution field than nodular cast iron staves, but their performance is much less satisfactory than that of copper staves. 相似文献
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冷却壁安全工作是保证高炉长寿的基础。通过设计并建造冷却壁热态实验炉,研究了高炉铸铁冷却壁热面无渣皮和有渣皮时的非稳态传热过程,考察了不同炉气温度条件下冷却壁热电偶温度的变化规律。回归得到了炉气在升温阶段、稳定阶段、降温阶段时冷却壁热电偶温度随时间的变化关系式。计算得出了冷却壁热面在有无渣皮条件下的平均热流强度,回归得出了炉气平均对流换热系数随炉温的变化关系。结果表明,冷却壁热面在有渣皮时热电偶温度的变化速率显著低于无渣皮时的变化速率,冷却壁破损的主要原因是冷却壁温度的反复变化和渣皮的频繁脱落而产生的热应力。 相似文献
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The capability of cooling staves is crucial for a long campaign life of blast furnaces (BF). Transient heat transfer analysis of blast furnace cooling staves made of copper, cast steel, and ductile cast iron are performed. Moreover, the temperature field variations of cooling staves according to different distributions of gas flow temperature are studied. A discussion of cooling staves made of the three different materials is given based on their performance during the transient heat transfer process. The results indicate that copper staves are suited for a long campaign life, as their performance is much better compared to cast steel and ductile cast iron staves especially during unsteady heat transfer. Moreover, the capacity of staves made of cast steel is better than that of ductile cast iron. 相似文献