Aggregates Manager Digital Magazine
Issue link: http://read.dmtmag.com/i/531447
35 AGGREGATES MANAGER July 2015 by Michelle Cwach D ewatering screens are common tools used to dewater fine aggre- gates (typically, minus-3/8-inch or smaller) prior to stockpiling. Feed to a dewatering screen can come from a variety of sources, including cyclones, density classifiers, fine material washers, and even di- rectly from classifying tanks. Depending on the gradation of the product to be produced, dewa- tering screens will typically produce a finished product with moisture content as low as 8 to 15 percent by weight. But whether you're a seasoned profes- sional who's been operating for years or your dewatering screen is mint from the manufacturer, there are common operating and maintenance missteps that can prevent you from achieving optimal performance from your dewatering screen, according to Carson Schott, sales engineer for KPI-JCI and Astec Mobile Screens. Start-up and daily maintenance One of the first steps to take at set-up is to ensure the vibrating motors are turning op- posite of one another, Schott says. All motor counterweights should be set equal to one an- other, and the switchgear must be installed to By paying attention to items such as initial setup, fine-tuning of settings, and maintenance, your screen can put the squeeze to both coarse and fine feeds. Get the Most (Water) Out of Your Dewatering Screen Consider the material type, feed rate, and percent of solids in the feed before the initial start-up of your dewatering screen.