▎ 摘　　要

NOVELTY - The utility model relates to the preparation of graphene, specifically claims a continuous expansion device for preparing graphene, comprising a microwave heating furnace set on the machine frame, the microwave heating furnace is up and down through the tubular. the upper end of the microwave heating furnace is provided with a spray unit and below the microwave heating furnace is connected with a quenching chamber, quenching chamber is provided with a returning spiral shape of the condensing pipe, a condensing pipe filled with liquid nitrogen, the quenching chamber is connected with a cyclone collector, a spraying unit spraying the graphite microwave heating furnace of powder, graphite rapidly warming, when the fall in the quenching chamber, the drop of temperature causes the graphite rapidly expands to form graphene and fall to the bottom of the cyclone collector from the inside to outside, the device provided by the utility model avoids mechanical grinding time and repeated extrusion damage of the crystal lattice of graphene, graphene produced good quality.