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:: Pegson Crushing Plants on the Western Isles
Marybank Quarry, near Stornoway on the Isle of Lewis, is Aggregate Industries’ base for their Western Isles operations. The Marybank site is the main producer of quarried materials on the island, as well as asphalt, ready-mixed concrete and pre-cast concrete blocks. With the ageing fixed plant needing replacement, and demand increasing at other smaller production facilities around the Western Isles - a change was seen as necessary and BL Pegson Scotland were chosen as the preferred supplier for their crusher requirements.
Over the years, the fixed plant had evolved to comprise four crushers, three screens and three re-feed hoppers to produce the materials required. This produced crusher run and scalpings to single size aggregates for asphalt, concrete, drainage and surface dressing.
A replacement mobile plant was needed to produce a wide product range at all the islands’ operations, with improved quality, extra output and the ability to be transported to different sites around the Western Isles, with a fast set-up time.
The customer chose a Premiertrak 1100 x 650 primary crushing plant and a 1000 Maxtrak cone-crusher to work in tandem, with two screens and a stockpile conveyor. The Premiertrak model features the high-production M-Series single toggle jaw crusher with hydraulic setting adjustment. Other important features include hydraulically driven tracks and conveyors, remote control, abrasion-resistant hopper, vibrating grizzly feeder and electro-hydraulic operation clutch. There is a heavy-duty product belt, integral folding side conveyor, dust suppression and dust covers. Optional extras included discharge level probe, electronic load sensor feed control and the latest TEREX Pegson development of push-button hydraulic adjustment.
The 1000 Maxtrak is TEREX Pegson’s most popular cone crushing plant and is a world-wide best-seller. With similar hydraulic and electro-hydraulic features as the Premiertrak, the 1000 Maxtrak is also fitted with a metal detector on the feed belt, “System 2" crusher setting controls with overload protection, medium/coarse Automax manganese wear parts, interlocked discharge belt, hydraulic drive dust-suppression pump with sprays, discharge conveyor covers and platform walkways.
The 1000 Maxtrak can be fed directly from the primary crusher discharge belt or by separate shovel or excavator feed - whichever is the site requirement. Oversize from the first screening plant can be fed back to the Maxtrak in a closed circuit, eliminating rehandling.
Angus MacLeod - Aggregate Industries’ Director for Stornoway, commented “In considering Aggregate Industries’ operations in the Western Isles and the need to produce a diverse range of aggregates for our asphalt and ready-mix plants throughout the islands of Lewis, Harris and the Uists, a mobile crushing plant was deemed to be the most suitable. Our experience of mobile plants at both Marybank Quarry, Lewis and Gairbh Eilean Quarry, Uist, led us to choose Pegson as the preferred suppliers. The previous successful use of a Pegson 1100 x 650 primary along with a Maxtrak 1000 cone crusher was found to be ideally suited for the flexibility and the wide range of products required. This set-up will also provide us with the opportunity to use the various items of equipment on specific construction projects throughout the islands. We are pleased with the production rates and quality of aggregate achieved so far and BL Pegson Scotland Limited has provided an excellent service from the initial supply stage to the commissioning of the plant”.
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