Blasting room / mechanical circulatory recovery blasting room / mechanical circulatory sandblasting the mechanical recycling of waste-peening sand room with screw conveyor, bucket elevator and a curtain separation recovery and separation of the sand material. Blasting exhaled sand materials and impurities, dust formation of the mixture back to the beginning of filtration through the grille at the bottom of the chamber body and a mixture of horizontal or vertical conveyor, screw conveyor, screw conveyor to complete to reach the bucket hoist, curtain separators for the separation of the sand material and particles of impurities enhance the role of bucket elevator, after separation, the sand material back to the feed box to continue recycling, large particulate impurities are brought to curtain by the slag after the separation of the end of discharge pipe. The curtain to the side of the separator with dust interface and the air inlet, used to take a mixture of dust generated during the separation process, the dust filter dust collector filter precipitation unified treatment of the ash hopper, clean air is vented into the atmosphere. Reduce indoor dust concentration, improve indoor visibility, improve the working environment, a dedicated system with a set of filter dust collector, which can meet the indoor and curtain separator dust. Blasting room / mechanical loop recycling blasting room / mechanical cycle waste-shot blasting sand room