▎ 摘　　要

NOVELTY - The utility model claims a raw material grinding device for preparing graphene, comprising a box body, the top wall of the box body is equipped with a feeding pipe, and the bottom end of the feeding pipe extends into the box body; the bottom end of the box body is hopper-shaped and is equipped with a discharging pipe; the box body is transversely and symmetrically rotatably connected with two grinding rollers contacted with each other, and one end of the grinding roller shaft rod extends to the outer side wall of the box body and is externally connected with the driving end of the driving motor; the inner wall of the box body located at the lower side of the two grinding rollers is obliquely provided with a screen; the cross section of the screen is arc-shaped, and the circle centre is located on the upper side of the screen, the inner side wall of the box body is provided with a cleaning brush in crescent shape, and the bottom wall of the cleaning brush is contacted with the side wall of the grinding roller. The grinding device of the solution can repeatedly grinding and grinding the raw material, ensuring the raw material after grinding meets the grinding requirement, and when grinding, the raw material absorbed on the rolling roller can be cleaned, so that the later raw material discharging is more complete, avoiding the residual raw material.