The invention relates to a method for purifying
graphite by co-heating hexafluoromanganate and
antimony pentafluoride generating
fluorine gas, which comprises the following steps of: vacuumizing a
fluorine gas reactor, and removing air in the reactor; taking materials of
antimony pentafluoride and hexafluoromanganate according to the
mass ratio of 2-3:1 and adding into a reactor for reaction to generate
fluorine gas; arranging a plurality of groups of
graphite products in a graphitization furnace according to required spacing, sequentially filling a heat preservation material and a
resistor material, heating the graphitization furnace to furnace center temperature of 1,800-1,900 DEG C after the furnace loading is finished, and introducing
nitrogen into the furnace core to remove the air inthe furnace center; when the temperature is raised to 1,900-2,000 DEG C, the
chlorine is stopped, and the
chlorine is converted to be introduced; when the temperature is raised to 2,300-2,500 DEG C,the fluorine gas generated by the reaction is communicated into the graphitization furnace. The method for purifying
graphite by co-heating hexafluoromanganate and
antimony pentafluoride generating fluorine gas uses hexafluoromanganate and
antimony pentafluoride to produce fluorine gas instead of
freon used in the purification process in the prior art, so that the problem that the
adverse effect on the environment in the use process of the
freon is avoided while the purification effect is good.