| Electrical resistivity of TiB2/C composite cathode coating for aluminum electrolysis |
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| 作者姓名： | 李劼 吕晓军 李庆余 赖延清 杨建红 |
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| 作者单位： | School of Metallurgical Science and Engineering Central South University，Changsha 410083，China，School of Metallurgical Science and Engineering Central South University，Changsha 410083，China，School of Metallurgical Science and Engineering Central South University，Changsha 410083，China，School of Chemistry and Chemical Engineering，Guangxi Normal University Guilin 541004，China，School of Metallurgical Science and Engineering Central South University，Changsha 410083，China，School of Metallurgical Science and Engineering Central South University，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);湖南省自然科学基金 |
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| 摘 要： | 1INTRODUCTIONThere are many disadvantages in the presentHall-Heroult electrolytic process1],such as highenergy consumption,low unit productivity and se-rious environmental pollution and so on,especiallythe high energy consumption of per ton alumin-ium,which ranges from13MW·h to15MW·h,and the energy efficiency is less than50%2].Therefore,low-energy consumption aluminumre-duction cell has been a research focus for interna-tional aluminum companies and institutes.Thedrained cathode cel…
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| 关 键 词： | TiB2 电解铝 复合材料 电阻率 |
| 文章编号： | 1005-9784（2006）03-0209-05 |
| 收稿时间： | 2006-01-05 |
| 修稿时间： | 2006-02-22 |
Electrical resistivity of TiB2/C composite cathode coating for aluminum electrolysis |
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| Li Jie , Lü Xiao-jun , Li Qing-yu , Lai Yan-qing and Yang Jian-hong.Electrical resistivity of TiB2/C composite cathode coating for aluminum electrolysis[J].Journal of Central South University of Technology,2006,13(3):209-213. |
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| Authors: | Li Jie Lü Xiao-jun Li Qing-yu Lai Yan-qing and Yang Jian-hong |
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| Affiliation: | (1) School of Metallurgical Science and Engineering, Central South University, 410083 Changsha, China;(2) School of Chemistry and Chemical Engineering, Guangxi Normal University, 541004 Guilin, China |
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| Abstract: | The electrical resistivity of TiB2/C cathode composite coating at different temperatures was measured with the electrical conductivity test device; the effects
of TiB2 content and kinds of carbonaceous fillers as well as their mean particle size on their electrical resistivities were investigated.
The results show that electrical resistivity of the coating decreases with the increase of TiB2 content and the decrease of its mean particle size. When the mass fraction of TiB2 increases from 30% to 60%, the electrical resistivity of the coating at room temperature decreases from 31.2 μΘ · m to 23.8
μΘ · m. The electrical resistivity of the coating at 960 °C lowers from 76.1 μΘ · m to 38.4 μΘ · m with the decrease of TiB2 mean particle size from 12 μm to 1 μm. The kinds of carbonaceous fillers have great influence on the electrical resistivity
of TiB2/C composite coating at 960 °C, when the graphite, petroleum coke and anthracite are used as fillers, the electrical resistivities
of the coating are 20.3 μΘ · m, 53.7 μΘ · m and 87.2 μΘ · m, respectively. For the coating with petroleum coke filler, its
electrical resistivity decreases with the increase of the mean particle size of petroleum coke filler. The electrical resistivity
at 960 °C decreases from 56.2 μΘ · m to 48.2 μΘ · m with the mean particle size of petroleum coke increasing from 44 μm to
1200 μm. However, too big carbonaceous particle size has adverse influence on the abrasion resistance of coating. Its proper
mean particle size is 420 μm.
Foundation item: Project(2005CB623703) supported by the State Key Fundamental Research and Development Program of China; project (5JJ30103)
supported by the Natural Science Foundation of Hunan Province |
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| Keywords: | aluminum electrolysis composite material TiB2 coating electrical resistivity |
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