Greystone

The portable Aggre-Dry dewatering screen from Columbus-based GreyStone Inc., features a flume that allows an operation to retain all of the fines discharged from the dewatering screw, according to the manufacturer. The addition of the flume offers a flexible and cost-efficient solution for controlling, recycling and saving water and fines while producing sand and gravel products with a moisture content as low as 7 to 12 percent, along with a caked, dry sand product that an inclined dewatering screw alone cannot achieve.

GreyStone Inc., based in Columbus, Neb., will debut its new aggregate equipment, which includes the unibody fine material washing screw and a portable dewatering screen with an Aggre-Dry style flume in Central Hall C5, booth 52372. The unibody fine material washing screw can be set up quickly, and consistently delivers thoroughly-cleaned aggregate, saving time and money for operations, according to the manufacturer.

GreyStone Inc., based in Columbus, NE, will debut their new aggregate equipment at CONEXPO-CON/AGG 2014 in Central Hall C5, booth 52372. The company’s new products include the recently released Unibody Fine Material Washing Screw and a portable dewatering screen with an Aggre-Dry┬« style flume.

GreyStone Inc., based in Columbus, Neb., offers three models of dewatering screens — the DS-488 (4-ft. by 8-ft. [1.2 by 2.4 m]), DS-6010 (5-ft. x 10-ft. [1.5 by 3 m]) and DS-7212 (6-ft. x 12-ft. [1.8 by 3.6 m]) — to handle a variety of capacities and efficiently dewater up to 300 tons (272 t) per hour.

Aggre-Spec sand classifying systems, manufactured by Columbus, Neb.-based GreyStone Inc., produce up to three products, including two spec products, from natural or manufactured sand blends. Aggre-Spec classifying systems allow producers to scalp excess water, reject excess material, separate and size sand particles and re-blend up to two industry-standard spec products simultaneously.

The automated log washer from Columbus, Neb.-based GreyStone Inc. increases efficiency and lowers labor costs for aggregate producers, keeping the quality of aggregate consistent while saving operators time and money. GreyStone recognized the need for log washer operators to keep output quality consistent without having to make frequent manual adjustments to the angle of inclination.

When fine material screws fail to remove enough moisture from their material, many sand operations decide to introduce a dewatering screen into their material flow. The producers who own them already know that dewatering screens typically require little maintenance.

GreyStone Inc., based in Columbus, Neb., offers a new fully portable self-erecting screen tower for sand, gravel and aggregate producers that move classifying equipment from site to site at least once per year. The screen tower, which uses a horizontal, vibrating three-deck wet screen, is a flexible alternative to permanent and stackable screen supports, according to the manufacturer.

GreyStone Inc., based in Columbus, Neb., offers a full line of conveyor systems with lengths ranging from 50 to 200 ft. (15 to 61 m), custom-designed to meet specific application needs. GreyStone’s conveyor line includes standard- and heavy-duty portable conveyors, radial stackers and tower radial stackers that deliver material flow capacities from 300 to 1,300 tons (272 to 1,179 t) per hour.

The Aggre-Dry Washer — GreyStone Inc.’s 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 (22 kW) to wash and dewater up to 100 tons (90.7 t) per hour.

GreyStone Inc.’s new automated log washer assists log washer operators keep output quality consistent without having to make frequent manual adjustments to the angle of inclination. The automated log washer with a hydraulic support system comes with a PLC sensor that detects the tonnage going through the unit.