CDE ’ s inclined Infinity sizing screens remove unnecessary weight , delivering a high power-to-weight ratio and a reduction in power consumption .
Polyurethane and rubber engineered screen media dampen the noise level of screening when compared with metal screens . have fallen through the screen media by the time it reaches the sharp phase at the discharge end , where near-size and oversize particles should be in direct contact with the media .
A vibrating screen operator should also examine wearability to determine whether media in the three phases is reaching maximum potential . If it seems as if screen media has to be changed too often , consider switching to something more durable .
Next , look at the screening challenges . Examine discarded screen media for signs of problem areas , such as broken wires , wear areas , pegging or blinding . Common screening issues include premature wear due to heavy material along with large amounts of abrasive fines . Screening problems can cause carryover or contamination , resulting in unwanted material in the screened pile or the added cost of rescreening . Also , broken screens mean costly unscheduled changeouts . All of these signs indicate there ’ s likely a better screen media option for at least one phase of screening , if not all three .
Screening a solution
An operation can see increased maintenance costs and downtime as a consequence of using the wrong screen media . If a vibrating screen continues to operate while having issues with pegging , blinding , broken screens or screen media with incorrectly sized openings , the screened pile will likely be contaminated and might require rescreening . Perhaps the most costly problems are unscheduled changeouts . It takes about an hour to shut down a vibrating screen and change one screen media section . While at first glance , an hour may not seem like a long time , the lost production to a mining operation , for example , will result in thousands of rands off the bottom line .
Engineered screen media , by itself or combined with woven wire cloth or self-cleaning screens , solve many common screening problems . The screens generally offer a longer service life than wire alternatives and their durable qualities address screen breakage from heavy bed depths . In addition , polyurethane and rubber resist premature wear from abrasive materials .
Besides the longer service life , polyurethane and rubber engineered screen media dampen the noise level of screening when compared with metal screens . This allows for more operational hours in areas with decibel limits during certain times of the day .
Engineered screen media is versatile . It allows operators to solve different problems or address unique situations by ordering customised panels . Some screen media manufacturers , for example , offer dual durometer screens with softer
Haver & Boecker
Haver & Boecker
Peter Craven
CDE
Manufacturers create engineered screen media out of several different types of material , such as polyurethane , rubber and perforated plates .
Look for a manufacturer that offers analysis systems for vibrating screens . Haver & Boecker ’ s Pulse vibration analysis software allows operators to monitor vibrating screen performance safely and in real time .
30 _ QUARRY SA | March 2017