The invention discloses a
graphite purifying method. The
graphite purifying method comprises the following steps that
graphite and
sodium hydroxide are placed into a
crucible together, deionized wateris added and stirred to be uniform by using a glass rod; and the
crucible is placed in a chamber electric resistance furnace to be roasted, after the
crucible is naturally cooled, the graphite in thecrucible is poured into a
beaker, the deionized water is added to wash the graphite, till the graphite is neutral,
hydrochloric acid is added to react for a period of time, then the deionized water is utilized for washing the graphite to be neutral, and the purified graphite can be obtained after complete
drying is conducted. The graphite purifying method firstly adopts
sodium hydroxide to be subjected to a
chemical reaction with graphite under the heating condition, the impurities such as
silicate and
aluminosilicate in the graphite are removed, a compound being
water soluble is generated, and impurities in the graphite are removed after the compound is washed.
Hydrochloric acid is utilized to remove
basic oxide impurities in the graphite, the method is simple, and convenient to operate,the graphite purifying and production efficiency is high, the requirement to the equipment is low, the
pollution to the environment is less, and the graphite purifying method has the extremely high practical popularization value.