Method for directly preparing graphene from anthracite

The invention belongs to the technical field of graphene preparation methods, and relates to a method for directly preparing graphene from anthracite, which comprises the following steps: 1) pretreating anthracite to obtain a pulverized coal sample; 2) taking the pulverized coal sample and copper chloride, stirring, mixing and drying to obtain mixed pulverized coal; (3) adding the mixed pulverized coal into a solid-phase shear force chemical reactor, grinding under dynamic pressure, irradiating the mixed pulverized coal once by adopting microwaves every 5-10 times of grinding, and completing grinding in a circulating manner; 4) measuring the resistivity of the mixed coal powder after each irradiation, and stopping grinding until the resistivity has a platform to obtain a coal-based graphene crude product; and 5) separating and purifying the graphene crude product to obtain the coal-based graphene. The method for directly preparing graphene from anthracite provided by the invention has the advantages of no pol