Multiple refining and crushing device for precoated sand regeneration

The invention relates to the related technical field of precoated sand regeneration equipment, in particular to a multiple refining and crushing device for precoated sand regeneration. Comprising a smashing device, a grinding box, a smoothing device, a discharging mechanism and a grinding device. The smoothing device comprises a horizontal sliding mechanism, a lifting device and a scraper; a grinding tool is smashed through the smashing device, the grinding tool enters the grinding box through the smashing device, at the moment, the grinding tool is smashed into small blocks and stacked in the grinding box, the lifting device can achieve corresponding adjustment of a scraper according to the stacked height of the grinding tool, and the small blocks can be flatly laid into the grinding box through the horizontal sliding device. According to the precoated sand forming device, the small fragments can be ground through the grinding device until the small fragments are ground to the required size after the small f