DESTONER

The destoner is used for continuous removal of stones from a stream of granular material, composed for instance of any variety of grain, Oil seeds, Cocoa beans, Wheat, Rice, Dal etc. Simple and dependable separation due to the stratification of the material into the product and the heavy impurities such as stones, metal, glass etc. Due to their different specific gravities, the heavy particles such as stones sink to the bottom of this layer of fluidized material, while the lighter particles supported by the cushion of air, float on top. The oscillating action of the screen causes the heavy particles to work their way to the upper end of the deck.There is an adjustable counter of air causes out the final separation of heavy particles from light material, and the stone discharge over the two top end of the deck and the air volume can be adjusted to achieve the optimal degree of separation. The essential mechanical difference is that there are two layers of sieve rather than the one in the stoner. The upper deck is used to stratify the incoming grain stream thereby concentrating the impurities whilst the lower deck is used to remove stones from the denser clean grains which have been separated from the lighter contaminated streams. Features : High accuracy of separation, thanks to preliminary, midling and final separation zones and excellent distribution of air across the entire screen.