Oxidation retarded graphite or carbon electrode and method for producing the electrode
AssigneeUnion Carbide Corporation
InventorCharles C. Chiu
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Abstract
A method for treating a carbon or graphite electrode comprising contacting the electrode with a phosphate-containing compound and a halide-containing compound. The treated electrode is oxidation retarded and inhibits non-conductive film formation between the electrode and a copper electrode holder, thereby inhibiting arcing between the electrode and the electrode holder when used in an electric arc furnace.
Claims16
A method for retarding oxidation of a carbon or graphite electrode and of inhibiting non-conductive film formation between the electrode and a copper electrode holder which comprises contacting the electrode with at least one liquid composition comprising at least one phosphate-containing compound, at least one halide-containig compound in an amount from about 1 wt. % to about 5 wt. % based on the total weight of the composition, and at least one solvent for the phosphate-containing compound.
A carbon or graphite electrode having a phosphate-containing compound and halide-containing compound deposited on the surface and impregnated into at least a portion of the interior of said electrode, said halide-containing compound being present on the electrode in an amount of between about 75 ppm and about 300 ppm and said phosphate-containing compound is present in an amount of between about 1 wt. % and about 7 wt. %, both based upon the weight of the treated portion of the electrode, said amount of halide-containing compound being impregnated into said electrode from at least one liquid composition containing between about 1 wt. % and about 5 wt. % of said halide compound based on the total weight of said composition.
Dependencies are inferred from the claim text.