▎ 摘　　要

NOVELTY - Preparing graphene from automobile crushing residue, involves: (1) screening an automobile crushing residue to remove ash, and then crushing to obtain crushed material; (2) roasting the crushed material to obtain pyrolysis coke and pyrolysis gas; (3) sequentially subjecting the pyrolysis coke to magnetic separation, pickling, water washing, drying and ball milling to obtain coke; and (4) carrying out flash evaporation on the coke by Joule heating. USE - Preparing graphene from automobile crushing residue. ADVANTAGE - The method can make full use of the pyrolysis solid residue in the automobile crushing residue, and the prepared graphene meets the requirements of industrial production, the thermal conductivity can reach 1314 W/(m.K), and the electrical conductivity can reach 2460 S/minute, in line with industrial production requirements.