▎ 摘　　要

NOVELTY - Device comprises a first extrusion device (4), a tearing device, a second extrusion device and a cutting device arranged in sequence. The outlet of the first extrusion device is connected to the inlet of the tearing device. The discharge port of the tearing device is connected to the feed port of the second extrusion device, and the cutting device is provided at the discharge port of the second extrusion device. The tearing device includes a first grinding disk and a second grinding disk that is rotate relative to the first grinding disc. The grinding surfaces opposite to the first grinding disk (5) and the second grinding disk (7) are provided with grinding teeth that is engage with each other. The grinding teeth provided on the first grinding disk and the grinding teeth provided on the second grinding disc. The grinding teeth provided on the first grinding disk and the grinding teeth provided on the second grinding disk are in the form of ray diffusion mesh. USE - Device for preparing graphene. ADVANTAGE - The device uses grinding teeth to grind and tear off the graphite kneaded material, which effectively increases the content of layers of graphene and multilayer graphene in the graphite kneaded material, improves modification effect of graphene and greatly improves the performance of the final modified graphene sheet. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene, which involves: (A) introducing the graphite kneaded material material that is kneaded and kneaded in advance into the first extrusion device; (B) introducing graphite kneaded material into the tearing device under the extrusion of the first extrusion device; (C) using the grinding effect of the first grinding disk and the second grinding disc, subjecting graphite mixed material is subjected to secondary cutting and tearing to increase the content of the and multiple layers of graphene in the graphite mixed material, completing the first pass Preparation process; (D) introducing ground graphite kneaded material into the second extrusion device; (E) compressing graphite kneaded material to the discharge port of the second extrusion device in a compressed state under the squeezing action of the second extrusion device; (F) providing discharge port of the second extrusion device with a die head device, and providing discharge port of the second extrusion device with a number of discharge holes; and (G) cutting graphite mixed material extruded at the discharge hole to complete the second preparation process to obtain modified graphite. DESCRIPTION OF DRAWING(S) - The drawing shows schematic view of device for preparing graphene. Support (1) Feed hopper (3) First extrusion device (4) First grinding disc (5) Second grinding disc (7)