▎ 摘　　要

NOVELTY - The method involves fixing an electric motor (101) on the outside of a steam treatment device (10). A stirring rod (102) is fixedly mounted on the output end of the electric motor. A groove (104) is provided at the bottom of the cavity of a steam treatment device. The groove is fixedly provided with a baffle (103) that is in contact with the inner cavity of the steam treatment device. The other side of the steam treatment device is provided with a detection pipe (105). USE - Method for preparing residual liquid of graphene. ADVANTAGE - The method is convenient and practical, which ensures that the graphene residue processing is more efficient, the content of the substance in the residue is effectively reduced, and the pollution to the environment is reduced. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic structural view of the steam treatment device. Steam treatment device (10) Electric motor (101) Stirring rod (102) Baffle (103) Groove (104) Detection pipe (105)