▎ 摘　　要

NOVELTY - The present invention relates to a method of utilizing graphite byproduct produced by steel production equipment to manufacture graphene sheet and its system, which is focused on carrying out the recycling and reuse of a graphite shiny sheet contained in a byproduct produced by the blast furnace used in producing a high-temperature liquid molten iron. By means of a liquid to provide a shear stress to act on one surface or side face of the graphite shiny sheet, the graphite shiny sheet is made to be dispersed into a plurality of graphene sheets, with the moving direction of the action direction of liquid shear stress opposite to that of the graphene sheet.