FIELD: chemistry.
SUBSTANCE: invention relates to carbon material thermo-chemical purification technology. The claimed method for natural graphite purification comprises heating it in Acheson graphitisation furnace to a temperature of 2000-2700°C by passing an electric current through a graphite core, followed by its treatment with a halogen-containing compound. Graphite blocks with the same cross section as the furnace core are placed in the furnace; the blocks are separated from one another by partitions. The partition thickness is 0.25-0.35 of the block length. The partitions are made of structural or electrode type graphite, porosity 20-27%. The invention provides reduction of furnace total resistance.
EFFECT: method for producing high purity natural graphite, improved core heating process, exact core position in the furnace both before and after heating.
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