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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 6    No. 1    March 1996

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ADDITION OF LITHIUM CARBONATE TO THE ANODE PASTE USED IN SODERBERG CELLS
Qiu Zhuxian1,Sun Ting1,Yue Yaxing1,Yao Kwangtsung1,Li Qingfeng1,Grjotheim Kai2,Kvande Halvor3

1.Department of Nonferrous Metallurgy,Northeaster,University,Shenyang 110006;
2.Department of Chemistry,University of Oslo,Oslo,Norway;
3.Hydro Aluminiurn,N-1321,stabekk,Norway

Abstract:Laboratory studies showed that addition of about 0.5%(in mass) Li2CO3,to the anode used in an aluminium electrolysis cell gave increased wetting of the anode by the cryolite-alumina melt,increased critical current density and reduced anodic overvoltage. The lithium carbonate then acted as acatalyst far the oxidation reactioa between the anode carbon and the oxide-containing ions in the melt. Anade paste containing lithium carbonate has been employed in Chinese aluminium smelters with 62Ka HSS cells.  This lead to improved eurrerit efficiency, reduced cell voltage and energy Consumption, as well as fewer anode effects per day.

 

Key words: lithium carbonate  anode paste  Soderberg cell

ISSN 1672-7029
CN 43-1423/U

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