Graphite electrode and method of making
AssigneeUnion Carbide Corporation
InventorsArthur William Moore, Herbert Franz Volk, Jack Kenneth Merrow
Life of this patent
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Abstract
Coke intended for use in graphitized articles such as graphite electrodes is thermally desulfurized and made more ordered by heating in the absence of air at a temperature between about 1600.degree. C and 2200.degree. C for a period of at least one hour before the particles are mixed with binder. Coke processed in this manner yields graphite electrodes of superior flexural strength and having lower coefficients of thermal expansion.
Claims28
In the process of producing graphitized articles of a quality suitable for use as graphite electrodes by forming, baking and graphitizing a mixture of coke filler and binder, an improvement resulting in articles of improved flexural strength which comprises heating at least a portion of said coke filler in the absence of air at a temperature between about 1600.degree. C and about 2200.degree. C for a period of at least 0.1 hour prior to mixing said particles with said binder.
A green carbon electrode capable of being baked and graphitized to yield a graphite electrode of improved flexural strength, which green electrode has been formed from a mixture of binder and coke filler, at least a portion of said filler having been heated in the absence of air at a temperature between about 1600.degree. C and about 2200.degree. C for a period of at least 0.1 hour before being mixed with said binder.
A baked carbon electrode capable of being graphitized to yield a graphite electrode of improved flexural strength, said baked carbon electrode having been baked from a green electrode formed from a mixture of binder and coke filler, at least a portion of said filler having been heated in the absence of air at a temperature between about 1600.degree. C and about 2200.degree. C for a period of at least 0.1 hour before being mixed with said binder.
A graphite electrode of improved flexural strength baked and graphitized from a green carbon electrode which has been formed from a mixture of binder and coke filler, at least a portion of said filler having been heated in the absence of air at a temperature between about 1600.degree. C and about 2200.degree. C for a period of at least 0.1 hour before being mixed with said binder.
Dependencies are inferred from the claim text.