Application of phosphates of aluminum to carbonaceous components of aluminum production cells
AssigneeMoltech Invent S.A.
InventorJainagesh A. Sekhar
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Abstract
Carbon-containing components of cells for the production of aluminum by the electrolysis of alumina dissolved in a cryolite-based molten electrolyte are protected from attack by liquid and/or gaseous components of the electrolyte in the form of elements, ions or compounds, by a treatment composition which consists essentially of a solution of one or more phosphates of aluminum. The treatment composition may alternatively consist essentially of one or more phosphates of aluminum, and one on more colloidal carriers.
Claims20
A method for treating a carbonaceous electrolytic cell component to prolong useful life of said component, consisting essentially of applying a treatment composition to said component, said treatment composition consisting essentially of a solution of one or more phosphates of aluminum and one or more colloidal carriers, wherein said method is carried out at temperatures up to 200.degree. C.
A carbonaceous component of a cell used for the electrolytic production of aluminum from alumina dissolved in molten cryolite-based electrolyte, wherein said component is impregnated with a coating consisting essentially of one or more phosphates of aluminum, and one or more colloidal carriers, wherein said impregnation is carried out at temperatures up to 200.degree. C.
Dependencies are inferred from the claim text.