▎ 摘　　要

NOVELTY - Preparation of graphene slurry involves preparing a graphene oxide aqueous slurry, drying the graphene oxide aqueous slurry to obtain dry graphene oxide, pulverizing the dry graphene oxide to obtain a powder, adding the powder to a tunnel furnace having several temperature zones with a temperature range of 80-950 degrees C for reduction and exfoliation treatment to obtain a graphene powder, and heat-treating the graphene powder in a heat-treatment device having a working temperature of 20-3750 degrees C. USE - Preparation of graphene slurry. ADVANTAGE - The method produces graphene slurry with high purity and high conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for graphene slurry preparation device, which has a low-temperature reactor, a low-temperature chiller, a medium-temperature reactor, a circulating cooling water device, a water dispenser, a high-temperature reactor, a high-temperature cooling kettle, a stationery tank, a reflux reactor, a purification reaction kettle, a purification plastic tank, a centrifugal buffer tank, an oven, a crusher, a tunnel furnace, and a heat-treatment device.