Separation system for recovering + 325-mesh fine sand from iron separation tailings

The utility model discloses a separation system for recovering + 325-mesh fine sand from iron separation tailings, and belongs to the technical field of tailings separation. The device comprises an iron dressing tailing slurry bin, the output end of the iron dressing tailing slurry bin is connected with a thickener through a pipeline, the output end of the thickener is connected with a slurry pump, the output end of the slurry pump is connected with a cyclone feeding pump station, the output end of the cyclone feeding pump station is connected with a cyclone, the output end of the cyclone is connected with a sculpture screen, and the sculpture screen is connected with a sculpture machine. Undersize mortar of the sculpture screen flows automatically and is conveyed to a cyclone ore feeding pump station; and the input end of the thickener is connected with a circulating water system. According to the utility model, a closed loop flow is formed by adopting a concentration-grading and dehydration-re-dehydration p