NEEDLE COKE FOR GRAPHITE ELECTRODE AND PROCESS FOR PRODUCING THE SAME

摘要

Provided are a needle coke for graphite electrodes, characterized by using, as a raw material coke, a needle coke comprising a coke of 100 parts by weight and adhered thereto a substance of 0.03 to 16 parts by weight in which a softening point, or a melting point, or a temperature at which it thermally decomposes without leaving a residue after subjecting it to a heat treatment at 200 DEG C or higher, does not exceed 1800 DEG C, particularly 0.05 to 5 parts by weight of at least one selected from a boron compound, a phosphorus compound, a silicon compound, and pyrex glass, in producing a needle coke for a raw material of a graphite electrode, and a process for producing the same. The use of the above needle coke in producing graphite electrodes can effectively inhibit puffing in a graphitizing step and improve the yield of the electrodes as well as enhancing the product characteristics, which in turn can provide a considerable amount of an industrial pr