Screening Equipment, July 2010
- Published: Thursday, 01 July 2010 08:00
Terex Cedarapids CRS6203 portable screening plant features a heavy-duty diagonal truss frame, plus patented flow-through lubrication system and sealed-for-life O-ring Huck bolt construction. Hardox steel-lined chutes are designed for long life, product engineers say, as are snag-resistant Vulcanized belts. Wide cross conveyors provide more horsepower and extend reach to transfer stacker conveyors.
The 6- ◊ 20-foot, triple-deck ElJay oval stroke screen offers high G-force action. Heavy AR400 blending chutes with multi-section gates enable the plant to output six products simultaneously. A low-maintenance flex-shaft screen drive ó eliminating tension idlers ó maintains constant belt tension, prevents belt whip and extends drive life.
The Terex Simplicity TXW616T portable screen and wash plant features a 6- ◊ 16-foot, triple-deck, quarry-duty inclined screen and twin 36-inch ◊ 25-foot dewatering screws. It has an I-beam main frame with two manual landing jacks and four cribbing legs. Walkways around three sides provide access to the screen. Allowing adjustment of water amounts are manifold and splash-style spray bars equipped with individual control valves.
Terex Minerals Processing Systems
Fritsch GmbH's line of laboratory instruments includes the Analysette 22 MicroTec-plus laser particle sizer with dry-dispersion unit. Spanning a 0.08-m [80-nm] to 2,000-m range, the device suits dry measurement of particle-size distribution for powdery samples of volumes less than 1 ccm to 100 ccm in an accelerated air flow. Operation entails fully automatic measurement, analysis and cleaning.
DynaSizer Analysette 12 achieves between 1-nm and 6-m particle-size measurements with dynamic light scattering. The device provides nano-range measurements using smallest sample quantities and concentrations from 0.0003% to 40%, the company notes.
Symons Screens now offers a trade-in program for all existing customers seeking to upgrade old screens or full drive assemblies. Under the new program, current customers can ship an old unit back for inspection and receive a credit on their purchase based on the trade-in condition. A customer typically will see about 5% to 20% savings on the cost of a new screener via the trade program.
A close estimate can be made with a few well-shot photographs. The process takes about four to eight weeks from inquiry to shipment.
KPI-JCI has added a Titan oil seal to its horizontal and combination screen models. This allows for pressure variances, thus permitting removal of the breather from lubrication reservoirs. Product engineers assert that the noncontact Titan oil seal will maintain consistent system pressure and eliminate intrusion into the oil reservoir of moisture and other foreign material. Any KPI-JCI horizontal or combination screen operating with earlier-model lip seals can upgrade to a Titan seal. Also, the company's Astec Mobile Screens is making the stealth tappet available for all of its high-frequency screens. The tappet shakes the screen cloth. The stealth tappet is mounted on the side of the screen box to improve accessibility. Its round shape allows material to pass, rather than become stuck.
Sweco's Mobile QuickChange system reduces screen changing to a one-man operation and adds mobility to the standard QC product line. The device especially suits plants with multiple round separator machines.
After removing the clamp band of the targeted deck, Mobile QC is maneuvered into position next to the separator. Clamping devices are locked onto the frame brackets, and a hand-operated pump is used to lift frames for screen removal. Once the screen is changed and frame stack replaced, the device can be advanced to the next machine.
Sifter Parts & Service offers the CS-1 gyratory sifter, a stacked-deck model that allows screen replacement using standard hand tools. The 50,000-pound/hour-capacity CS-1 provides two to four dry-product separations ranging in size from 1/4-inch down to 400 mesh. Screen change-outs on the CS-1 require no noxious glue, drying time or tensioning machine.
Sifter Parts & Service
Cleveland Vibrator Co.'s Electro-mechanical Ball Tray Deck Screener (EMBS) is designed for precise end-particle size. Effective EMBS operation is attributed to its ball tray deck, the physical area beneath the wire-cloth screen surface that contains balls in specialized compartments.
The screener's linear vibration activates ball-bouncing movements within deck compartments and against the underside of the screen section. As balls randomly strike the screen bottom, they knock out angular pieces wedged into the screen, thereby clearing openings and eliminating potential plug blinding.
EMBS units are mounted horizontally, requiring no gravitational assistance for product conveyance along the screening surface. The screener is equipped with 1,800 rpm vibrators providing 0.10-inch stroke. The drives' force output may be varied to decrease stroke for reduced final conveying speed. Lower frequency and higher amplitude can be achieved with 900 rpm or 1,200 rpm drive options for difficult-to-handle, light-density, fluffy products ó or where screen openings greater than 1 inch are in use.
Cleveland Vibrator Co.
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