Primary screens optimize feed and reduce need for operator intervention
CDE Global R-Series range of primary screens have been designed to optimize feed to CDE’s turnkey wash plants and reduce the requirement for a dedicated operator to feed the processing plant.
The new range includes two new machines. The R1500 has a maximum feed capacity of 200 tonnes per hour while the larger R2500 machine offers a maximum feed capacity of 500 tonnes per hour. Both machines are suitable for use in the pre-screening of a range of materials including sand and gravel, crushed rock, C&D waste, topsoil, coal, salt, iron ore and other mineral ores.
The R-Series combines a feed hopper, screen and conveyors in a variety of configurations. The feed hopper on the R1500 has a maximum capacity of seven tonnes when fitted with the optional extendable hopper sides while the hopper capacity on the R2500 unit rises to 20 tonnes. Both machines can be provided with either a belt feed or apron feed. The hopper has been designed to allow for feed to be delivered to the R-Series from three sides to allow maximum flexibility to cope with specific site conditions.
Speaking about the R-Series, Stewart Cusick, Product Development Engineer at CDE Global said, “The R-Series allows for a constant, even flow of material to be delivered to the integrated screen before being sent for additional screening, washing and sizing. The hopper capacity – particularly on the R2500 machine – allows for charge filling of the hopper which frees up an operator and vehicle to complete other jobs on site, ultimately reducing the level of operator intervention required with your processing plant.”
The R-Series sees the introduction of two new galvanized Infinity screens from CDE. Both include their new patented side wall technology which eliminates welds and results in a stronger, lighter screen. The screen produces the same acceleration as traditional screens while using less power, the company says.
The R1500 includes the Infinity P1- 36R screen which measures 2.4 x 1.5 m (8 x 5 feet) while the R2500 integrates the Infinity P2-75R screen measuring 5 x 1.5 m (16 x 5 feet).
“The only assumptions we made from a design perspective was that the screen needed to be rectangular and have one, two or three screen decks,” explains Kevin Vallelly. “We are able to screen better because of design features like the Rosta suspension mounts which ensure maximum transfer of energy to the material.”
The cartridge design of the screen decks maximizes plant life as it increases the durability of otherwise welded joints. The Infinity range also included the development of cast U-Span cross members which are also weld-free and significantly reduce floor flex – reducing stress and extending the life of the machine.
Further weight is removed from the screen thanks to the unique design of the screen shaft which reduces the mass of the shaft assembly while still generating the same force as a solid shaft.
Extensive use of replaceable wear liners at every feed and impact point maximizes plant life and includes such features as a magnetic polyurethane cover on the screen shaft, tapered rubber chutes at the screen discharge point and easy to replace steel wear plates in the RSeries feed hopper.
The R-Series utilizes SKF bearings with a unique double seal arrangement, which prevents contamination during operation of the screen by reducing the risk of material and water ingress.
Side walls of the screen are raised to prevent rogue rocks from bouncing off the top deck of the screen. The two machines in the R-Series also include 800mm galvanized walkways to ensure site operators have quick, easy and safe access for essential machine inspection and maintenance.