| Effect of working condition on thermal stress of NiFe2O4-based cermet inert anode in aluminum electrolysis |
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| 作者姓名： | 李劼 王志刚 赖延清 刘伟 叶绍龙 |
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| 作者单位： | School of Metallurgical Science and Engineering Central South University，School of Metallurgical Science and Engineering Central South University，School of Metallurgical Science and Engineering Central South University，School of Metallurgical Science and Engineering Central South University，School of Metallurgical Science and Engineering Central South University，Changsha 410083 China，Changsha 410083 China，Changsha 410083 China，Changsha 410083 China，Changsha 410083 China |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
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| 摘 要： | Based on the FEA software ANSYS,a model was developed to simulate the thermal stress distribution of inert anode.In order to reduce its thermal stress,the effect of some parameters on thermal stress distribution was investigated,including the temperature of electrolyte,the current,the anode cathode distance,the anode immersion depth,the surrounding temperature and the convection coefficient between anode and circumstance.The results show that there exists a large axial tensile stress near the tangent interface between the anode and bath,which is the major cause of anode breaking.Increasing the temperature of electrolyte or the anode immersion depth will deteriorate the stress distribution of inert anode.When the bath temperature increases from 750 to 970 ℃,the maximal value and absolute minimal value of the 1st principal stress increase by 29.7% and 29.6%,respectively.When the anode immersion depth is changed from 1 to 10 cm,the maximal value and absolute minimal value of the 1st principal stress increase by 52.1% and 65.0%,respectively.The effects of other parameters on stress distribution are not significant.
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| 关 键 词： | 阳极 热应力 铝电解 金属陶瓷 含陶合金 |
| 收稿时间： | 11 November 2006 |
| 修稿时间： | 2006-11-112007-03-27 |
Effect of working condition on thermal stress of NiFe2O4-based cermet inert anode in aluminum electrolysis |
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| Li Jie , Wang Zhi-gang , Lai Yan-qing , Liu Wei and Ye Shao-long.Effect of working condition on thermal stress of NiFe2O4-based cermet inert anode in aluminum electrolysis[J].Journal of Central South University of Technology,2007,14(4):479-484. |
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| Authors: | Li Jie Wang Zhi-gang Lai Yan-qing Liu Wei and Ye Shao-long |
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| Affiliation: | School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China |
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| Abstract: | Based on the FEA software ANSYS, a model was developed to simulate the thermal stress distribution of inert anode. In order
to reduce its thermal stress, the effect of some parameters on thermal stress distribution was investigated, including the
temperature of electrolyte, the current, the anode cathode distance, the anode immersion depth, the surrounding temperature
and the convection coefficient between anode and circumstance. The results show that there exists a large axial tensile stress
near the tangent interface between the anode and bath, which is the major cause of anode breaking. Increasing the temperature
of electrolyte or the anode immersion depth will deteriorate the stress distribution of inert anode. When the bath temperature
increases from 750 to 970 °C, the maximal value and absolute minimal value of the 1st principal stress increase by 29.7% and
29.6%, respectively. When the anode immersion depth is changed from 1 to 10 cm, the maximal value and absolute minimal value
of the 1st principal stress increase by 52.1% and 65.0%, respectively. The effects of other parameters on stress distribution
are not significant.
Foundation item: Project (2005CB623703) supported by the National Basic Research and Development Program of China; Project (50474051) supported
by the National Natural Science Foundation of China |
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| Keywords: | inert anode thermal stress working condition aluminum electrolysis |
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