共查询到18条相似文献,搜索用时 93 毫秒
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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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高炉陶瓷杯复合炉衬的应用 总被引:1,自引:0,他引:1
对陶瓷杯复合炉衬的应用情况进行了总结,并对陶瓷杯炉衬材料的性能、厚度选择和砌筑方法进行了分析,认为:陶瓷砖要具有良好的抗铁水渗透性、冲刷性、耐磨性和较低的导热性,厚度为230~345mm;炭砖要具有良好的抗铁水渗透性,较高的导热性,厚度是陶瓷砖厚度的2.0~2.5倍;陶瓷砖与炭砖之间、炭砖与冷却壁之间不需要留捣料层。 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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高炉炉墙热负荷的传热学分析和研究 总被引:10,自引:1,他引:9
应用传热学理论计算了冷却器设计参数,炉衬厚度,渣铁凝固层厚度以及对流换热系数对炉墙热负荷的影响。结果表明:高炉炉墙的热负荷与冷却水管直径,冷却水管间距和镶砖的导热系数成正比,与冷却水管距冷却壁热面的距离,镶砖厚度和面积成反林;改变冷却壁的设计参数虽然使炉墙的热负荷增大,但炉墙的热面工作温度却反而降低。这有利于保护炉衬。 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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根据热弹性力学理论,建立了渣皮厚度可变的铜冷却壁热-力耦合应力场分布计算模型,从铜冷却壁本体和炉渣-镶砖界面应力分布的角度分析了煤气温度、冷却制度、镶砖材质和炉渣性质等因素对铜冷却壁寿命及挂渣稳定性的影响规律.计算结果表明:煤气温度的升高使铜冷却壁本体应力线性升高,同时挂渣稳定性减弱;铜冷却壁本体应力值及挂渣稳定性均随渣皮厚度增加而呈现先下降后上升的趋势,实际生产中渣皮厚度应维持在30~60 mm之间;冷却水流速的增大会导致铜冷却壁本体应力值小幅上升,但可使挂渣稳定性增强;冷却水温的提升可小幅降低冷却壁本体应力,但会显著降低挂渣稳定性;镶砖热导率的提升和炉渣热膨胀系数的减小均有利于降低铜冷却壁本体应力并增强挂渣稳定性. 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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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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NowmostofBF (BlastFurnace)operatorsbe lievethatcampaignlifeofBFisnotmainlydeter minedbyrefractorylining ,butbycoolingap paratus[1] .Therefractoryliningcanbewornoutwithinfewyears .Ifthecoolingapparatuscankeepalongtime ,andthefrozenironandslagskullcanre newitselfandstandforever ,itbecomespermanentlining .ItissurethattheBFoperationcanbeinanunstablestate ,todaytheskullmeltsdown ,butto morrowitcanbefrozenagain ,i e .,anewlayerofliningisformed .Asforthecoolingapparatus ,ifthehotsurfacetemperatur… 相似文献