Page 29 - Hub4 Magazine Issue 51

Quarrying
Aidan McGeary – MD - Blue Central, responded, “The Premiertrak 4oo Jaw Crusher is a well-established machine as a primary jaw crusher and the 1150 and the Chieftain 2200 are very recent developments and demonstrate a marked improvement in cleanliness of the product and the train itself provides a huge ‘sweet spot’ in the process through the three machines. In terms of a cost per ton the machines provide the maximum return as they work so well together. We have enjoyed a long and successful history with the site as we have dealt with the contractors in the past and now finally directly with the owners who are a blue-chip plc. We have a good understanding of what is required to produce saleable high- quality products at a rate to satisfy the demand on them. It s a high-profile operation which demands world class processing machines and the crushing and screening train reflects that.”
The production process:
As blasted material is delivered to an adjacent stock pile which is then broken up into more manageable sizes by a hydraulic excavator fitted with a breaker; this is then loaded by a back actor onto the stepped self-cleaning grizzly inside the hydraulically folding hopper of the Powerscreen® Premiertrak 400 Primary Jaw Crusher which has been specifically designed for this type of quarrying operation.
Fitted with an under feeder screen the aggregate is fed into and aggressively crushed by the high swing action of the jaw crusher which in turn supplies the Maxtrak 1150 Cone Crusher with a 6”/150mm down material. This is then further crushed down to a -40/50mm material by this machine.
The Powerscreen® Maxtrak 1150 Cone Crusher is a medium sized cone crusher which has been designed for direct feed applications without pre-screening on clean rock. At its heart is the Automax® cone crusher which provides excellent reduction and product cubicity for the production of high- quality aggregate and sub-base material. Hydraulic release capabilities are designed so that any uncrushable material entering the chamber is safely discharged.
Material from the Maxtrak is then fed onto the Chieftain 2200 – 3-deck screen which then delivers through the decks to hydraulically folding conveyors making 4 stockpiles of 40/20/10mm and dust.
Kieron commented, “The Chieftain is a big machine which gives it time to do effective separation with no snowballing effect where the materials become contaminated, it just achieves a better run-off. We are very pleased with it all, it’s a huge improvement all around.”
The Powerscreen® Chieftain 2200 3-deck is designed for operators who require large volumes of high specification products with maximum versatility. Its patent pending drive system which allows switching between 2 and 4 bearing with bolt-on parts. By splitting up into two individual boxes, the Chieftain 2200 3-deck is able to run aggressively without the constraints of a larger box.
A total success:
Kieron summarised, “It was a huge sea change for us to actually manage the crushing and screening operation, but we have a good working relationship and received fabulous machine training and back-up from all the team at Blue Central. We have a substantial demand for these products so its essential we can have the confidence in the equipment which will ensure we get the required tonnage. We are running with a high demand on single- size aggregate as we are the biggest supplier locally; however, with the train running comfortably at 150tph we are keeping full control of our stocks.”
www.hub-4.com July 2018 - Issue 51
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