CELULA PARA A PRODUCAO DE ALUMINIO ATRAVES DE ELETROLISE DE UM ELETROLITO CONTENDO ALUMINA A BASE DE CRIOLITA EM FUSAO

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 linin...

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Bibliographic Details
Main Author ERNEST WILLIAM DEWING
Format Patent
LanguagePortuguese
Published 21.05.1985
Edition4
Subjects
APPARATUS THEREFOR
CHEMISTRY
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS
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Summary: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 DEG 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.
Bibliography:Application Number: BR19848402855