▎ 摘　　要

NOVELTY - Preparation of large-area graphene comprises providing iron ore material to high temperature furnace, and reducing iron ore using reducing agent into high-temperature molten iron and sheet containing graphite; adding high-temperature molten iron into furnace to obtain steel material; purifying to graphite dispersion using purification technique; and applying shearing force to graphite dispersion using pressurized fluid to disperse graphite sheet. USE - Method for preparing large-area graphene (claimed). ADVANTAGE - The method reduces environmental pollution. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of large-area graphene preparation device. Steel making device (10) Filtering device (20) Connecting pipe (21) Pressurizing device (31) Tube body (33)