Electric Field Numerical Simulation and Cathode Structure Optimization of Rare Earth Electrolysis Cell

被引：0

作者：

Zhang H. ^{[1
]}

Lü X. ^{[2
]}

Zhong S. ^{[1
,3
]}

Wang J. ^{[1
,3
]}

Chen H. ^{[1
]}

Liu S. ^{[2
]}

Zeng X. ^{[2
]}

Jian Y. ^{[4
]}

机构：

[1] Xiamen Zijin Mining and Metallurgical Technology Co., Ltd., Xiamen

[2] School of Metallurgy and Environment, Central South University, Changsha

[3] Zijin Mining College, Fuzhou University, Fuzhou

[4] Inner Mongolia Jinzhong Mining Co., Ltd., Jinzhong

来源：

Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2020年 / 38卷 / 05期

关键词：

Cathode; Electric filed; Electrolysis cell; Finite element; Rare earths;

D O I：

10.11785/S1000-4343.20200512

中图分类号：

学科分类号：

摘要：

In order to study the effect of the cathode rods corrosion and the installed cathode rods sleeve on the electric field distribution, and the effect of new electrode structure on the electric field distribution, a traditional rare earth electrolysis cell 3-D model was established by ANSYS. After the cathode rod was corroded, the current was concentrated in the corrosion area, where current density is up to 2.4×106 A•m-2, a lot of Joule heat was generated and cathode corrosion was accelerated. In addition, the cell voltage of the external cathode protection sleeve increased by 90 mV and the embedded cathode protection sleeve increased by 150 mV as a result of the cathode protection sleeve is installed in different ways. The results showed that the electric field distribution of the bottom hemispherical cathode electrolysis cell is more even, which avoids local overheating of the electrolysis cell, and is beneficial to increase the current efficiency and service life of rare earth electrolysis cell. © 2020, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved.

引用

页码：667 / 676

页数：9

共 22 条

[1] Chen G H, Liu Y B., Research progress of rare earth molten salt electrolysis technology, Rare Earth Information, 10, (2015)
[2] Vogel H, Flerus B, Stoffner F, Friedrich B., Reducing greenhouse gas emission from the neodymium oxide electrolysis. Part I: Analysis of the anodic gas formation, J. Sustainable Metall, 3, 2, (2016)
[3] Lu X J, Zhang H X, Liu S, Zeng X P., Effect of anode consumption of rare earth electrolysis cell on electric field, Journal of the Chinese Society of Rare Earths, 37, 4, (2019)
[4] Deng R F, Fang C H., Corrosion and protection of cathodic molybdenum (tungsten) rod during metal tantalum electrolytic process, Chinese Journal of Rare Metals, 21, 2, (1997)
[5] Liu Z X, Wu Y F, Zhang H G., Analog simulation of the electric field in rare earth electrolytic cell, Nonferrous Metals (Extractive Metallurgy), 1, (2008)
[6] Wu Y F, Liu Z X, Li S T., Analog simulation of the electric field in rare earth electrolytic cell, Nonferrous Metals (Extractive Metallurgy), 3, (2010)
[7] Wang J L, Yang Y Q., Analysis of electric field in rare earth molten salt electrolytic cell based on Comsol, Nonferrous Metals Science and Engineering, 7, 6, (2016)
[8] Liu Z, Li Z A, Zhang X W, Pang S M, Chen D H, Wang Z Q., Numerical simulation of flow field in rare earth electrolysis cell, The Chinese Journal of Nonferrous Metals, 25, 11, (2015)
[9] Wang J, Zhang Z L, Tu G F, Wu W Y., Simulation of the electric field in 10 kA bottom-cathode-structure rare earth electrolytic cell, Chinese Rare Earths, 31, 4, (2010)
[10] Wu F J, Ooyang J Q, Yang W L, Luo X, Wu X Y., Electric field simulation of 10 kA bottom cathode rare earth electrolytic cell, Hydrometallurgy of China, 36, 5, (2017)

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