▎ 摘　　要

NOVELTY - A composite phase change energy storage material, comprises 41-70 wt.% paraffin, 0.41-0.70 wt.% graphene, and balance iron tailings porous ceramics. The paraffin is high latent heat phase change material with melting point of 52-58 degrees C and latent heat of phase change of 182.1 J/g, and graphene is thermally conductive reinforcing material with lateral dimension of 2-3 mu m and bulk density of 0.2 g/mL. The iron tailings porous ceramic is carrier material having porosity of 69-90%. USE - Composite phase change energy storage material. ADVANTAGE - The energy storage material has high thermal conductivity, excellent stability and heat transfer efficiency, excellent mechanical and thermal properties, can be shaped after melting, and does not leak. The method is economical and effectively utilizes iron tailings. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of composite phase change energy storage material, which involves ball milling (1) iron tailing raw materials, dispersant and deionized water uniformly, adding organic monomer and cross-linking agent, ball milling (2) to obtain slurry, adding foaming agent and foam stabilizer to the slurry, and foaming the slurry by high-speed mechanical stirring, injecting initiator and catalyst, stirring the slurry evenly and pouring into the mold for gel formation, demolding and drying to obtain porous ceramic component of iron tailings, sintering porous component in muffle furnace to obtain iron tailings porous ceramics, adding graphene to molten paraffin, mechanically stirring and ultrasonically dispersing to obtain graphene/paraffin mixture, adding iron tailings porous ceramic carrier to molten paraffin mixed liquid, compounding mixed liquid and porous ceramic by melt infiltration and cooling.