Modern Mining May 2015

CRUSHING, SCREENING AND MILLING

screen media is its excellent open area, versa- tility and relative low cost. FLSmidth’s Poly Ripple (a polyurethane- Vibro Optimax™ hybrid) are screens with non-woven wires bound together by poly- urethane bands. This construction reduces or even eliminates the blinding and pegging of screen surfaces. These polyurethane bands are located above the nosing rubber, which prevents metal to metal contact and allows tensioning on the machine. “A correctly installed and tensioned wire screen such as this allows the secondary har- monics from the vibrating equipment to be transferred through the polyurethane to the wire and introduces additional vibrations to the wire itself. This introduces a self-cleaning element to the screen media that eliminates both blinding and pegging in most applications and increases throughput. This eliminates the need to shut down a screen for cleaning pur- poses, which also contributes to a good health and safety environment,” says Sibley. FLSmidth’s wedge wire sieve bend screens can be custom-designed and manufactured for a range of industries. The main application is

to separate solids from liquids. “The curved screen of a sieve bend allows for a greater capacity than a flat wedge screen due to the increased g-forces on material flowing against the curve,” Sibley says. Sieve bend screens, also known as DSM, offer the benefit of an energy-efficient opera- tion with no moving parts, which means no energy input costs and reduced maintenance. These screens can be used for sizing particles down to 0,2 mm and resist clogging by near- size particles. 

Meshcape™ polyurethane deck with BPS (bolt, pin and sleeve) assembly.

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May 2015  MODERN MINING  59