▎ 摘　　要

NOVELTY - Preparation of hard carbon-graphene composite material involves adding crushed waste tire rubber powder to a reactor, introducing high-purity inert gas at flow rate of 0.1-1.8 m3/hour, pyrolyzing to generate pyrolysis gas pyrolysis oil and pyrolysis carbon, setting pyrolysis oil condensation system at exhaust outlet of a device to collect pyrolysis oil product, collecting gas-phase product, measuring gas content, adjusting molar ratio of gas carbon source, carrier gas and hydrogen to 0.01-25:1:0.01-20 by mixing the required gas, to obtain optimized pyrolysis gas, closing inert gas valve when pyrolysis process is completed, introducing optimized pyrolysis gas at 0.1-1.8 m3/hour, growing graphene in the reactor by chemical vapor deposition method, directly heating to 500-1800℃, heat-preserving for 0.1-25 hours, closing optimized pyrolysis gas valve, introducing inert gas, naturally cooling, and purifying obtained hard carbon-graphene composite material. USE - Preparation of hard carbon-graphene composite material. ADVANTAGE - The method enables efficient and economical preparation of hard carbon-graphene composite material with high performance and reduced energy consumption, and reduced industrial process energy consumption. DETAILED DESCRIPTION - Preparation of hard carbon-graphene composite material involves adding crushed waste tire rubber powder to a reactor, introducing high-purity inert gas at flow rate of 0.1-1.8 m3/hour, heating at rate of 0.1-25℃/minute from room temperature to 200-700℃, heat-preserving for 0.5-20 hours for pyrolysis to generate pyrolysis gas pyrolysis oil and pyrolysis carbon, setting pyrolysis oil condensation system at exhaust outlet of a device to collect pyrolysis oil product, collecting gas-phase product, measuring gas content, adjusting molar ratio of gas carbon source, carrier gas and hydrogen to 0.01-25:1:0.01-20 by mixing the required gas, to obtain optimized pyrolysis gas, closing inert gas valve when pyrolysis process is completed, introducing optimized pyrolysis gas at 0.1-1.8 m3/hour, growing graphene in the reactor by chemical vapor deposition method, directly heating to 500-1800℃, heat-preserving for 0.1-25 hours, closing optimized pyrolysis gas valve, introducing inert gas, naturally cooling the reactor, and purifying obtained hard carbon-graphene composite material. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart illustrating preparation of the hard carbon-graphene composite material. (Drawing includes non-English language text)