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