Multi-stage grinding device for high-purity quartz sand

The utility model discloses a high-purity quartz sand multistage grinding device which comprises a first grinding assembly, a second grinding assembly is arranged on the outer surface of the upper end of the first grinding assembly, a feeding port is formed in the outer surface of one side of the second grinding assembly, a crushing mechanism is arranged in the feeding port, and the crushing mechanism is arranged on the outer surface of one side of the second grinding assembly. Supporting legs and a discharging port are arranged on the outer surface of the lower end of the first grinding assembly, the discharging port is located on one sides of the supporting legs, and dust falling mechanisms are arranged on the two sides of the supporting legs correspondingly. According to the multi-stage grinding device for the high-purity quartz sand, due to the arrangement of the second grinding assembly, caked quartz sand can be effectively prevented from blocking the feeding port, feeding of the feeding port is more con