Foundry waste sand circulating system

The utility model discloses a foundry waste sand circulating system which comprises a boiling cooling bed, an ash bin and a cooling box, a high-pressure blower is installed at the left end of the boiling cooling bed, a blowing nozzle connecting plate is installed at the right end of the high-pressure blower, a cooling pipe is installed on the right side in the boiling cooling bed, and an inlet pipe is installed at the upper end of the boiling cooling bed. A connecting plate is mounted on the outer side of the inlet pipe, and a fixing mechanism is connected to the outer side of the connecting plate; the ash bin box is arranged at the front end of the discharging pipe, an auger box is fixedly installed on the outer side of the ash bin box, an auger body is installed in the auger box, the rear lower side of the auger box located at the rear end of the ash bin box is connected with the discharging pipe, and a filter plate is fixedly installed in the ash bin box. According to the foundry waste sand circulating sys