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| Effects of Electrolyte Penetration on Pyro-conductivity of Graphitic Cathodes for Aluminum Electrolysis |
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Received:September 30, 2013
Revised:October 10, 2013
Accepted:October 11, 2013
Published Online:March 31, 2014
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| DOI：10.3969/j.issn.1007-7545.2014.04.006 |
| KeyWord:sodium/electrolyte penetration; electrical resistivity; graphitic cathode; aluminum electrolysis |
| Author | Institution |
| Zhu Jun |
北京科技大学冶金与生态工程学院有色金属冶金系 |
| Xue Jilai |
北京科技大学冶金与生态工程学院有色金属冶金系 |
| Li Xiang |
北京科技大学冶金与生态工程学院有色金属冶金系 |
| Wang Wei |
北京科技大学冶金与生态工程学院有色金属冶金系 |
| Chen Tong |
北京科技大学冶金与生态工程学院有色金属冶金系 |
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| Abstract: |
| Electrical resistivity of two industrial cathodes, 35% graphitic (HC35) and 100% graphitic (HC100), at high temperature was tested respectively. As the results indicate, thermal expansion of cathodes results in a change of parameters of porous structure, which in turn give rise to variation of resistivity before electrolysis. After electrolysis, the change of resistivity is ascribed to penetration between sodium and electrolyte, which is strongly affected by the porous structure of cathodes. Infiltration of sodium and electrolyte into cathode is facilitated by bigger average diameter and connectivity of pores, and smaller sinuosity of connecting pores in porous structure, In turn, a better infiltration results in bigger change of resistivity after electrolysis. |
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