OVERLINE: Supply Lines

Down to the Last Drop

Drain as much water as possible out of your aggregate materials with this line-up of dewatering screens and screws.

by Kerry Clines, Senior Editor

For the digital edition of this article with photos, which originally ran in the March 2010 issue of Aggregates Manager, click here.

Dewatering screens increase production while removing water.

Metso

Metso Mining & Construction says the first section of its high-capacity dewatering screen is constructed with a sharp 45-degree slope to remove water during the initial screening process. The remaining reverse-incline sections retain material and compact particles into a “filter cake” where most of the remaining moisture is removed.

Linatex

The G4 dewatering screen from Linatex features a curved, sieve-like feed section and upward-inclined main deck for increased dewatering. The company says the use of centrifugal force allows a larger total screening area without increasing the size of the machine.

Derrick Corp.

Derrick Corp. says its new W56 dewatering screen features true-High G force linear motion coupled with a high-open-area urethane screen surface to allow water removal at up to 300 tons per hour. The unit is operated by two vibratory drives and can be outfitted with spray bars for a cleaner end product.

GreyStone

GreyStone, Inc. offers three dewatering screen models — the 4- by 8-foot DS-488, the 5- by 10-foot DS-6010, and the 6- by 12-foot DS-7212. The units produce a dense, compact cake that rides up the belt to form a pile with no runoff or water pools. The high-frequency separators have an adjustable bed depth, table tilt, and vibrator variables.

Sizetec

The reverse-angle deck, VDS dewater screens from Sizetec, Inc. are available in many sizes — 2 by 7 feet, 3 by 8 feet, 3 by 10 feet, 4 by 10 feet, 5 by 12 feet, 6 by 12 feet, and 7 by 14 feet. All screens are equipped with either 1,200- or 1,800-rpm motors; the largest screen can dewater sand at up to 300 tons per hour.

Screen and screw combinations offer double-duty dewatering.

Trio Engineered Products

Trio offers a range of dewatering screens that can work along or in series with screws to provide additional dewatering when lower moisture content is desired. The company also offers fine material washers and log washers.