NOVELTY - Apparatus comprises a microwave generator (10) to generate microwave, a nitrogen supply unit (20) to supply nitrogen gas to produce plasma flame which generates oxygen-free atmosphere at inside of purification unit, a raw material supply device (30) to supply low purity graphite powder into purification unit, a graphite crucible (40) to remove vaporized and decomposed impurities of the graphite powder by maintaining atmospheric temperature, and cyclone (50) for separating the produced high-purity graphite powder from vaporized impurities, and collecting the purified graphite.    USE - The apparatus is useful for purifying graphite using microwave plasma (claimed) to produce semiconductor, fine chemical materials for display, solar cell, graphene and rechargeable battery.    ADVANTAGE - The apparatus improves 10-1000 times economic value of low-purity graphite, and productivity. The graphite is simple to purify, economical and environmentally friendly.    DETAILED DESCRIPTION - Apparatus comprises a microwave generator (10) for generating microwave, a nitrogen supply unit (20) for supplying nitrogen gas to produce plasma flame which generates oxygen-free atmosphere at inside of a purification unit, a raw material supply device (30) for supplying low purity graphite powder as raw material into the purification unit, a graphite crucible (40) for removing vaporized and decomposed impurities of the graphite powder by maintaining atmospheric temperature, and multiple cyclones (50) for sequentially separating the produced high-purity graphite powder from vaporized impurities, and collecting the purified graphite, where the apparatus is used to purify graphite by generating nitrogen plasma in an oxygen-free atmosphere using the microwave, and purifying graphite with high-purity by focusing energy of the nitrogen plasma on low-purity graphite, and by gasifying high temperature decomposed silica, alumina and iron present in graphite. An INDEPENDENT CLAIM is also included for purifying graphite using microwave plasma, comprising (a) reacting nitrogen gas with microwave to generate plasma flame of high-temperature, (b) performing decomposition gasification of impurities presents in low purity graphite powder by spraying the graphite powder on the nitrogen plasma flame, (c) improving efficiency of the reaction by extending reaction time at high temperature, and maintaining stable decomposition vaporization of impurities, (d) separating the high-purity graphite powder from the impurities produced in the multiple cyclones, and collecting, and (e) discharging the impure gases to atmosphere, and collecting the purified graphite powder in a dust collecting device.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the apparatus for purifying graphite.    Microwave generator (10)    Nitrogen supply unit (20)    Raw material supply unit (30)    Graphite crucible (40)    Primary cyclone (50)