Terex Minerals Processing has developed new feeder and screen plants, expanding its CR Series of portable plant range.
The new machines, the Terex Cedarapids CRS620S Portable Screen plant and Terex Cedarapids CRS6203FV Portable Feeder/Screen plant, are the next generation of Terex processing plants, according to the company.
Terex stated that the new CRS620S screen increases production and handles applications not possible with traditional horizontal screens because it combines high g-force oval stroke motion with adjustable variable slope operation.
This plant can handle larger deck loads and larger screen openings.
Hydraulics raising modules can quickly change the screen slope in 2.5 degree increments up to a maximum of 7.5 degrees to best fit the screening application.
Screen openings up to 152 mm are possible while ‘slant spring’ screen suspension provides stability at all slopes, and includes low-maintenance dampers and also eliminates transport braces.
The plant uses large capacity conveyors to handle the high production capabilities of the new LJ-TSV6203 screen, while an optional fines reject system is able to remove excess fines to help achieve in-spec product without additional conveyors.
The 1219 mm wide fines conveyor, which has an elevated discharge, and the two 762 mm wide reversible cross conveyors, which extend up to 1067 mm beyond the main frame, easily feed off-plant conveyors.
The screen plant has magnetic screen deck liners for cross beams and diagonal braces.
Roll-away blending chutes and extended walkways allow easy access to screen cloth.
A low-maintenance flex shaft screen drive eliminates drive belt influence on the screen motion, belt whip, belt slippage, and spring loaded belt tensioners.
There are no drive adjustments necessary when the screen slope is altered. In addition, the new flex shaft drive folds for travel, without shaft disassembly, to minimise plant transport width.
Terex added that the plant interfaces with cone in-out style plants.
Its other machine, the CRS6203FV, has been designed to “handle applications not possible with traditional horizontal screens because it combines the efficient, high g-force oval stroke motion with variable slope operation”.
In a similar fashion to its other machine the CRS6203FV uses a LJ-TSV6203 variable slope screen that is able to handle larger deck loads and has bigger screen openings that increase throughput and production.
A bottom deck deflector plates shift material towards the feed end of the screen, boosting screen efficiency.
Hydraulic raising modules are able to lift the screen up to 10 degrees in 2.5 degree increments as needed, while its patent pending screens stabilisation system also includes motion dampers.
Under-frame mounted triple-axle spring suspension with spring-applied brakes provides increased stability.
It has a large surge hopper with a remote controlled tipping grid and a variable belt feeder that allows loader feed from either side of the machine for more flexibility in production.
The feed hopper measures 4877mm by 2438 mm and comes with rubber side curtains.
The portable feeder screener has been designed with maintenance in mind, and features conveniently located grease banks, cartridge style cross belt flashing, and Martin style conveyor belt wipers.
Its service platforms and guard rails run around three sides of the screen, and are accessed by a telescoping ladder.
“Plant interfaces with cone in-out style plants and can be configured with or without belt feeder and grid providing high versatility,” Terex said.
However Terex are not the only company to introduce new screens.
CDE Global has released a number of new screens in its ProGrade range, which features new screen design systems.
According to CDE the new screen design system results in a stronger but lighter screen which requires less power.
This is due to a re-design of the side walls on the screens.
The new bolted screens also include zero welds and are galvanised as standard, all of which serves to maximise plant life, maximise plant availability and minimise time required for maintenance.
An additional feature of the new ProGrade screens is the patent pending CDE U-Span cross members.
The new cross member design is modular across the ProGrade range and also include zero welds.
As well as offering enhanced geometric consistency the new design facilitates increased space between screen decks, allowing for quick and easy access to replace screen media.
CDE Global product development manager Kevin Vallelly added that “the first stage of the new ProGrade product launch sees the introduction of our new patented technology on a number of screens and dewatering screens. The developments will also be incorporated on the new EvoWash 100 range of sand washing plants and across the M2500, M3500 and M4500 portable washing plants and the R2500 primary screening unit.”
The new screen design system is now available on the ProGrade P2-75 (two deck 5 meter by 1.5 metre screen), P3-75 (three deck 5 meter by 1.5 metre screen) and P2-108 (two deck 6 metre by 1.8 metre screen).
Over the course of the next few months the new design will also be offered on the ProGrade P3-108 (three deck 6 metre by 1.8 metre screen).
