Powerscreen introduced several new machine features at Hillhead 2018.
Modifications to the Powerscreen Premiertrak 600, Metrotrak jaw crushers, and the Trakpactor 550SR impactor were publicly demonstrated for the first time at the trade show.
As well, the Powerscreen Chieftain 2200 three deck plant served as the highlight screening development at the show.
“Powerscreen has developed and maintained an aggressive position in mobile crushing and screening,” said Dearbhaile Mulholland, Powerscreen’s global marketing manager. “This year’s Hillhead show comes at the perfect time for us to showcase our latest developments and to continue leading the way.
The Premiertrak 600 featured a new XL feeder designed for maximum strength, particularly for large quarrying applications where hard rock may be present and where large tonnages are required.
The diesel-hydraulic and diesel-electric variants of the Premiertrak 600 jaw crusher are designed and constructed to deliver maximum production. The high capacity jaw is fed by a vibrating grizzly feeder with variable speed control and a large grizzly area to maximize removal of fine material. The bypass chute is also fitted with standard wear-resistant liners, and incorporates an adjustable five-position deflector plate to divert material to either the product or side conveyors.
The machine control system incorporates a modern interface with intuitive graphics and high-resolution display for ease of operation. As well, the speed of the jaw crusher on the Premiertrak 600 may be adjusted to suit the application.
The Premiertrak 600E electric variant is equipped with an over-size genset sufficient to run another plant. It successfully powers the large Powerscreen Warrior 1400XE heavy duty scalping screen, and can be powered from a main source, which decreases the running costs and environmental impact.
The new Powerscreen Trakpactor 550SR
The new Trakpactor 550SR horizontal shaft impactor is designed for processing primary and secondary materials such as natural rock and materials like asphalt and demolition waste. It features cutting-edge styling with GRP guards and also comes with the standard Powerscreen Pulse Intelligence system.
The machine’s 137 cm x 91 cm impact chamber features a twin apron, four bar rotor design with hydraulic release aprons, hydraulic setting adjustment, hydraulic crusher overload and is driven directly off the engine via clutch to optimize fuel economy. The product conveyor features a raise/lower facility to aid clearance of rebar in the event of a blockage.
Hydraulic banks, battery access and control valves are at eye level to make setup and operation easier. The post-screen and recirculation section is fully detachable using quick release hydraulics.
In late 2017, the Powerscreen Metrotrak was reborn. Building on its predecessor, it featured several usability and serviceability upgrades. This compact jaw crusher is ideally suited for operators in the mining, quarrying and recycling industries, especially those working in tight locations where space, as well as transport space, is restricted.
The variable speed VGF is now fitted with bolt-in stepped grizzly cassettes and rotating mesh deck, which helps with quick application changes and maintenance. The three-way bypass conveyor is larger than its predecessor and has standard inspection holes and wear liners at discharge points to help with material flow. The bypass conveyor is also easy to set up, inspect and maintain and can be reversed on site if required in certain applications.
The product belt conveyor has also been upgraded. Relocated belt tensioning bolts help keep the belt tracked, clearance under the chamber has increased and operators can now fully lower the conveyor to ground level for maintenance and service tasks while revised skirting helps eliminate snagging points to improve material flow.
The chamber unblock feature, with the aid of a motor attached to the flywheel on the chamber, will rock the chamber back and forth until the blockage is cleared. This gives the Metrotrak the advantage of a hydrostatic setup while retaining the fuel efficiency of direct drive.
Chieftain 2200 3 Deck
The Chieftain 2200 3 deck has two 6.7 metre x 1.5 metre three deck screenboxes that provide a total screening area of 19.5 square metres. This gives a high tonnage capacity, often exceeding 700 tonnes per hour, resulting in increased quality product and revenue, according to Powerscreen.
The machine also features a patent pending drive system, which allows switching between two and four bearing with bolt-on parts. With a four-bearing box, the efficiency of the screen may drop as the box length increases. The box may become susceptible to torsion, which twists the metal and may cause fatigue.
By splitting into two individual boxes, the Chieftain 2200 3 deck is able to run without the constraints of a larger box. It can screen with a 20 per cent increase in G-force. As well, the tumbling action between the screens helps to maximize efficiency of the screens and accuracy of the product.