共查询到18条相似文献,搜索用时 187 毫秒
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高炉冷却壁和炉衬的三维传热模型 总被引:13,自引:4,他引:13
本文给出了计算高炉冷却壁和炉衬温度分布的三维稳态传热模型,该模型可用于分析冷却壁不同结构参数(厚度、水管直径、管间距、镶砖厚度和面积等),和不同材料等因素对温度分布和热流密度的影响,它可为冷却壁的设计和炉衬材料的选择提供重要的理论依据。 相似文献
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高炉铜冷却壁合理操作建议 总被引:1,自引:0,他引:1
从铜冷却壁引进到目前的短短十几年间,中国大于1 000m3的高炉,在炉腰炉腹和炉身下部已普遍使用铜冷却壁。由于使用时间短,铜冷却壁热面裸露和结瘤频繁,严重影响生产。企业迫切需要知道何种操作因素控制铜冷却壁的渣皮脱落。目前,一些钢厂通过调整冷却水量和冷却水温度来实现挂渣稳定性和挂渣厚度控制,但往往收效甚微,为此建立了炉墙... 相似文献
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带凸台冷却壁温度场的数值模拟 总被引:1,自引:0,他引:1
开发了一个三维柱坐标系下冷却壁传热的计算机软件,应用该软件在给定的假设条件下研究了高炉带凸台冷却壁的温度分布情况,同时研究了炉内对流换热系数,冷却水速度、水管间距及砖衬厚度对冷却壁和耐火材料温度分布的影响,以及冷却壁设计弧形半径的作用。 相似文献
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本设计包括2500m~3高炉本体炉型、炉衬、冷却设备和炉壳设计。同时,对所设计高炉本体特点进行简述。本高炉有效容积为2500m~3,高径比取值2.5,高炉利用系数取值2.25,炉缸炉底采用陶瓷杯结构,同时选用光面冷却壁,炉腹、炉腰及炉身采用镶砖冷却壁。 相似文献
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高炉铜冷却壁的设计及应用探讨 总被引:1,自引:0,他引:1
对高炉铜冷却壁的设计及应用进行了探讨,如:铜冷却壁冷却系统的最大热负荷能力,铜冷却壁应用的部位,铜冷却壁冷却水质的选择,铜冷却壁炉衬结构的特点以及铜冷却壁的制造要求等。 相似文献
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小模块冷却壁是将性能优异的耐火材料直接浇铸在平行排列的冷却水管上而形成的一种新型冷却设备。采用ANSYS软件建立了小模块冷却壁温度场计算模型,利用该模型计算了炉气温度为1200~1600℃、冷却水流速为0.5~2.5m/s条件下壁体材质导热系数、水管材质、水管直径、水管间距、冷却水流速及工作环境温度等条件变化时小模块冷却壁的温度分布状况。结果表明,小模块冷却壁对炉气温度变化的适应能力较强,壁体材质导热系数、水管间距、壁体厚度对小模块冷却壁传热性能影响较大,而水管直径、水管材质及水流速的影响较小。 相似文献
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通过炉衬、冷却壁、炉壳等与炉内温度之间的传热计算,对冷却壁的设计参数进行了搪塞分析,并提出了推荐的冷却壁设计参数。 相似文献
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The detailed process of the heat transfer of the cooling stave in blast furnace (BF) has been systematically analyzed and the simplified mathematical model was constructed based on heat transfer theory. Precise definitions of the cooling capacity, stable working slag thickness and safe working slag thickness were put forward so as to evaluate the cooling capacity of cooling stave systematically. The results show that 95% of heat is carried off by cooling water through convection and the heat taken away through convective heat transfer between furnace shell and atmosphere only account for 5%. The entire heat transfer process can be divided into four modules and the cooling system is divided into three parts. The cooling capacity φ is defined and function curve of temperature of cooling stave hot surface Tb with changes of brick thickness is drawn and the safe working area and stable working area are put forward. 相似文献
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The critical heat flux surveys of thirteen Chinese blast furnaces were carried out.The mathematical model of hearth bottom was established and the temperature field was simulated by utilizing the method of inverse problem based on the collected parameters and temperature data.The critical heat flux and dangerous critical heat flux of hearth were defined and analyzed as well as the initial and investigative critical heat flux of hearth,and the influences of thermal conductivity and residual thickness of carbon bricks on critical heat flux were discussed.The relationships between critical heat flux of stave and hearth bricks were also compared.It is found that the dangerous critical heat flux of these blast furnaces ranged from 9.38 to 57kW/m2.Therefore,there was no uniform critical heat flux of hearth due to the structure design,refractory materials selection,construction quality of hearth and other factors.The heat flux should be lower than the critical heat flux with corresponding thickness of carbon bricks to control the erosion of hearth.The critical heat flux of stave would be much lower than that of hearth bricks with the air gap.However,the critical heat flux of stave should be higher than that of hearth bricks when gas existed between furnace shell and staves. 相似文献
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分析了影响高炉炉衬寿命的因素和炉衬冷却系统的重要性,探索了用于高炉冷却系统的铸铁冷却壁和铜冷却壁,进一步陈述了高炉热负荷的选择和炉衬耐材的选择,从而阐述了现代高炉的炉衬冷却系统。 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