This innovative sand dewatering unit combines a fine material screw and dewatering screen to produce sand and gravel products with a moisture content as low as 8 to 13 percent—by weight—while using only 30 HP to wash and dewater up to 100 TPH. A standard GreyStone inclined single-spiral fine material washer initially dewaters the material while the rotation of the dewatering screw scrubs it to remove surface dirt. The action of the screw flights sends the sand up the inclined tub as the vibratory dewatering screen further removes moisture from the sand. The combined process produces a caked, dry sand product that neither an inclined dewatering screw nor a vibratory screen can separately achieve. The Aggre-Dry Washer is available in sizes to handle production of 100, 200, 300 and 400 TPH.

 

Benefit

• Combines the efficiency of a dewatering screw with the drying characteristics of a dewatering screen
• Produces sand & gravel products with a moisture content as low as 8 to 13 percent by weight
• Creates a caked, dry sand product and drip-free stockpiles with no runoff or water pools
• Standard fine material washer initially dewaters the material
• Vibratory dewatering screen at end of the flights further removes moisture
  • 0.25 mm screen opening reduces amount of material throughs
  • 14" bed depth squeezes additional moisture from the sand
• Re-introduces the throughs from the screen back into the washing process for more salable product
  • Eliminates the need for pumps or cyclone sand separation systems
• Uses less than half the horsepower required to process the same tonnage of spec product using a traditional screen/cyclone system
• Increased water handling capacity for greater versatility
• Available in sizes to handle production of 100, 200, 300 and 400 TPH.