▎ 摘　　要

NOVELTY - The method involves injecting (S110) an inert gas into a plasma device to generate plasma. Expandable graphite and graphite intercalation compounds (GIC) are injected (S120) into the plasma device in constant amounts. The expandable graphite and GIC to be expanded are allowed (S130) by thermal plasma treatment such that graphene is exfoliated, where the inert gas is selected from group consisting of argon and helium, and the inert gas is injected into the plasma device under condition of a flow rate of 10 to 300 Limin. The exfoliated graphene is passed through a vacuum chamber such that the exfoliated graphene is collected through a collector. USE - Method for continuously mass-manufacturing high-purity graphene by using thermal plasma e.g. direct-current (DC) plasma or ultra-high frequency plasma (all claimed). ADVANTAGE - The method enables continuously mass-manufacturing the high-purity graphene efficiently without environmental problems, so that the graphene continuously manufactured from expandable graphite can be obtained in high purity with less impurities without need for a reduction process, and the obtained graphene includes excellent physical properties, thus obtaining large-area grapheme in easy manner and realizing excellent electrical conductivity of the graphene. The method enables reducing price of the graphene, time required for manufacturing the graphene, and obtaining the graphene in powder form in easy manner so as to obtain the graphene with sufficient size when the expandable graphite includes small average size of less than 0.1 mm, so that average size range of the expandable graphite is preferable. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating a method for continuously mass-manufacturing high-purity graphene by using thermal plasma. Injecting inert gas into plasma device to generate plasma (S110) Injecting expandable graphite and GIC into plasma device in constant amounts (S120) Allowing expandable graphite and GIC to be expanded by thermal plasma treatment such that graphene is exfoliated (S130) Collecting exfoliated graphene through collector by passing exfoliated graphene through vacuum chamber (S140) Cooling collected graphene to obtain graphene in form of powder (S150)