Aluminium electrolytic reduction cell linings
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United States of America Patent
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Mar 3, 1987
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N/A
app pub date -
Jun 6, 1984
filing date -
Jun 13, 1983
priority date (Note) -
Expired
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Abstract
The invention concerns cells for production of Al by electrolysis of an alumina-containing electrolyte based on cryolite and having a lining based on alumina for containing the electrolyte. A layer containing an alkali or alkaline earth metal compound, e.g. sodium aluminate, is included in the lining, preferably around the 880.degree. C. isotherm when the cell is in operation. On penetration of the lining by the electrolyte, the compound dissolves in or reacts with the electrolyte so as to raise the solidus and reduce or prevent further penetration.
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