New portable dewatering screen from GreyStone

US manufacturer says latest Aggre-Dry screen keeps moisture content as low as 7–12%

COLUMBUS-based GreyStone Inc. have launched their new portable Aggre-Dry dewatering screen which features a patented flume that retains all of the fines discharged from the dewatering screw.

According to Greystone, the addition of the flume offers a flexible and cost-efficient solution for controlling, recycling and saving water/fines while producing sand and gravel products with moisture content as low as 7–12%. The dewatering screen also produces a caked, dry sand product that an inclined dewatering screw alone would not achieve.

Wheel-mounted for easy transportation, the 5ft x 10ft Aggre-Dry screen can be connected directly to a washing screw for on-demand production. The plant has several unique features, including a 0.25mm screen opening that reduces the amount of material which can fall through the screen.

The feed from the screw allows the material to build to a bed depth of up to 14in on the screen, squeezing additional moisture from the sand as the vibratory motors move it along the length of the screen deck, which, in turn, further reduces moisture content.

There are also screen panels on the sides of the dewatering screen so more water can be removed from the material.