Effect of TiB2 content on resistance to sodium penetration of TiB2/C cathode composites for aluminium electrolysis

被引：5
作者：
李劼
方静
李庆余
赖延清
机构：
[1] Department of Chemistry,Guangxi Normal University,Guilin 541004,China ,School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China
[2] 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 Un
来源：
Journal of Central South University of Technology(English Edition) | 2004年 / 04期
关键词：
aluminium electrolysis; TiB2; cathode; composite material; sodium penetration;
D O I：
暂无
中图分类号：
TF821 [铝];
学科分类号：
080603 ;
摘要：
TiB2/C cathode composites with various contents of TiB2 were prepared and their characterizations were observed and compared. The expansion of samples due to sodium and bath penetration was tested with a modified laboratory Rapoport apparatus and the appearances of the cut sections of specimens after electrolysis were studied. The results show that the mass of TiB2/C cathode composites with mass fraction of TiB2 less than 70% appreciably increases, but that of the composites with mass fraction of TiB2 more than 70% decreases slightly after being baked. The resistance to sodium and bath penetration of TiB2/C cathode composites increases with the increase of TiB2 content, especially in the composites with high TiB2 content. TiB2/C cathode composites have high resistance to the penetration of sodium and bath as well as good wettability by molten aluminum, and keep integrality and have little change of appearance after electrolysis, which indicates that TiB2/C cathode composites can be used as inert wettable cathode for aluminum electrolysis.
引用
收藏
页码：400 / 404
页数：5
相关论文
共 19 条
  • [1] TiB2 /colloidal alumina carbon cathode coating in Hall-Heroult and drained cells. Sekhar J A,de Nora V,Liu J,et al. Light Metals 1998 . 1998
  • [2] Wettability of TiB2-based cathodes in lowtemperature slurry-electrolyte reduction cells. Brown C W. Journal of Occupational Medicine . 1998
  • [3] Meltpenetrationandchemicalreactionincarboncathodesduringaluminiumelectrolysis:Ⅰ.laboratoryexperiment. BrilloitP,lassiusLP,OyeHA. LightMetals1993 . 1993
  • [4] InertcathodesforaluminiumelectrolysisinHallHeroultcells(Ⅰ). BillehaugK,OyeHA. Aluminium . 1980
  • [5] Wetting of graphite and carbon/TiB2 composites by liquid aluminium. XUE Ji-lai,Oye H A. Light Metals 1993 . 1993
  • [6] The operational performance of 70 kA prebake cells retrofitted with TiB2-G cathode elements. Tabereaux A,Brown J,Eldridge I,et al. Light Metals 1998 . 1998
  • [7] Development and application of TiB2-C composite coated cathodes. LIAO Xian-an,LIU Yie-xiang,MAO Zheng-ping. Material Review . 1995
  • [8] InertcathodesforaluminiumelectrolysisinHallHeroultcells(Ⅱ). BillehaugK,OyeHA. Aluminium . 1980
  • [9] Laboratorytestingofcarboncathodematerialsatoperationaltemperatures. SorlieM,OyeHA. LightMetals1989 . 1988
  • [10] A review of RHM cathode development. McMinn C J. Light Metals 1992 . 1992
12