| 摘要 |
PROBLEM TO BE SOLVED: To provide a new gravity sorting device of aggregate which excels in sorting performance and sorting velocity while maintenance is relatively easy. SOLUTION: This gravity sorting device is provided with a plate 10 having a lot of through holes and installed in a water tank 8 for storing separating water so as to be immersed in the separating water and actuating means 14a-14c (14) for actuating the separating water so that aggregate material on the plate 10 is vertically pulsated in the separating water. The actuating means 14 is provided with gas chambers 13 opened in the lower part thereof and installed in the separating water below the plate 10 and a gas feed/ discharge means for alternately performing the feed of gas into the gas chambers 13 and the discharge of gas from the gas chamber 13. The feed pressure of gas is calculated with the weight of the aggregate material on the plate 10 being taken into account.
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