▎ 摘　　要

NOVELTY - Preparing expanded graphite by using graphene composite material comprises (i) taking graphite powder, special graphite powder, squama graphite, intercalation agents, perchlorate, permanganate and de-ionized water, (ii) processing graphene powder, special graphite powder, flake graphite through milling equipment, (iii) mixing milled and sieved powder, (iv) adding mixed material into sealed roasting furnace, heating, chemical intercalating, mixing and stirring uniformly, stirring, heating, filtering, washing, drying, (v) firstly feeding graphite expansion using graphite expansion furnace, placing the expandable graphite into the furnace through the feed port, second expansion, discharging, and collecting, controlling the discharge port temperature at -5 degrees C and (vi) adding the expanded graphite material into desired particle size to obtain expanded graphite material by processing laser pulse. USE - The method is useful for preparing expanded graphite by using graphene composite material. ADVANTAGE - The method improves the pressure resistance, flexibility, plasticity of the finished product and self-lubricating property, specific representative, adsorptivity, high and low temperature resistance, anti-corrosion, anti-radiation property, earthquake-proof property, conductivity, anti-aging and anti-twisting. DETAILED DESCRIPTION - Preparing expanded graphite by using graphene composite material comprises (i) taking graphite powder, special graphite powder, squama graphite, intercalation agents, perchlorate, permanganate and de-ionized water, (ii) processing graphene powder, special graphite powder, flake graphite through milling equipment to obtain the required particle size, (iii), mixing the milled and sieved powder, (iv) adding the mixed material into sealed roasting furnace, heating to 1250 degrees C to carbonization, chemical intercalating, mixing and stirring uniformly the perchloric acid and the mixed material after carbonized according to liquid-solid ratio and potassium permanganate and mixing material liquid solid ratio, stirring at room temperature uniformly, heating to 30-50 degrees C, continuously stirring and reacting for 1-3 hours, adding de-ionized water to make the temperature of the reaction device, heating to 50-100 degrees C, continuously stirring and reacting for 1-5 hours, filtering, washing the filtrate, drying to obtain expandable graphite, (v) firstly feeding graphite expansion using graphite expansion furnace, placing the expandable graphite into the furnace through the feed port, the temperature of the feed port is room temperature, second expansion, where the expansion temperature of the hearth is 700-1000 degrees C, discharging at 50 degrees C, and collecting to obtain expanded graphite material, controlling the discharge port temperature at -5 degrees C and (vi) adding the expanded graphite material into desired particle size to obtain expanded graphite material by processing laser pulse.