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EFFECT OF STRUCTURAL PARAMETERS ON THE THERMAL STRESS OF A NiFe_(2)O_(4)-BASED CERMET INERT ANODE IN ALUMINUM ELECTROLYSIS

查看全文 作　　者：J. Li Z.G. Wang Y.Q. Lai Y.Y. Wu S.L. [1]Ye 高影响力作者 机构地区：[1]School of Metallurgy Science and Engineering, Central South University, Changsha 410083, China高影响力机构 出　　处：《Acta Metallurgica Sinica(English Letters)》索引2007年第20卷第2期,共9页高影响力期刊 基　　金：supported by the National Key Basic Research and Development Programme of China(No.2005CB623703);the National Natural Science Foundation of China(No.50474051 and No.50374081). 摘　　要：Inert anode has been a hot issue in the aluminum industry for many decades. With the help of FEA(finite element analysis) software ANSYS,a model was developed to simulate the thermal stress distribution working condition of an inert anode. To reduce its thermal stress,the effect of some parameters on the thermal stress distribution was investigated,including the anode height,the anode radius,the hole depth,the hole radius,and the radius of inner chamfer and outer chamfer. The results showed that in the actual working condition of an inert anode,there existed a large axial tensile stress near the tangent interface between the anode and bath,which was the major cause of anode breaking. Increasing the anode height and reducing the hole depth properly seemed to be beneficial for the stress distribution. With the increase of anode radius,the stress distribution became better first and then deteriorated,the reasonable value was between 0.045 to 0.06m. The hole radius had a significant effect on the stress and a smaller radius would reduce the thermal stress. The effect of the radius of the inner chamfer and the outer chamfer was less than other parameters. 关 键 词：铝电解 NiFe2O4基金属陶瓷 惰性阳极材料 热应力 结构参数
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