自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 16    No. 1    February 2009

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Digital characterization and mathematic model of sodium penetration into cathode material for aluminum electrolysis
LÜ Xiao-jun(吕晓军)1, LI Qing-yu(李庆余)1, 2, LAI Yan-qing(赖延清)1, LI Jie(李 劼)1

1. School of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China;
2. School of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, China

Abstract: The sodium expansion curves of semi-graphitic cathode and TiB2/C composite cathode with different TiB2 contents were measured with the improved Rapoport-Samoilenko apparatus. The mathematic model of the sodium expansion was deduced on the basis of the experimental results. The sodium expansion parameter (a) and penetration rate factor (Q), were introduced into the model. The model was validated with the experimental sodium expansion curves self-measured and reported. The results show that the variation tendency of the sodium expansion parameter (a) and penetration rate factor (Q) is consistent with that of the experimental curves. The model is capable of not only conveniently judging the cathode quality, but also favorably establishing a unified standard of the resistance to sodium penetration of cathode.

 

Key words: aluminum electrolysis; cathode; sodium expansion; modeling; characterization

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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