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Spectrum De-Stoners are used for separating heavier materials like stones, glass, metal etc., from food grains and other dry granular material.
Pressure fans in the machine, below the vibrating deck, force air through the bed of material, thus stratifying the product into heavier and lighter fractions. Vibrating deck pushes the heavier material in contact with the deck upwards towards the stone discharge spout, whereas the lighter material flows down the inclined, vibrating deck and exits through the clean product spout. Inclination of the vibrating deck, speed of eccentric motion, feed rate and the air flow can be individually adjusted to achieve the optimum degree of separation. A wide variety of deck screens are available to suit specific applications. All adjustments can be made with ease and minimum of operator training.
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