Page 34 - Hub-4 Magazine Issue 72
P. 34

  Crushing & Screening
PowerX Equipment increase the processing power for the CEMEX Dove Holes crushing operation
Situated in Derbyshire close to the Peak District, Dove Holes is CEMEX’s largest quarry and provides aggregates for construction projects all over the country.
The Dove Holes operation is continually striving to be more efficient and sustainable with nearly 50% of the aggregate transported by rail to major markets such as Leeds, Sheffield, Manchester, London and Birmingham.
Contract crushing:
With increasing demand for aggregate, in March 2021 the CEMEX Dove Holes team engaged the expertise of PowerX Equipment under a crushing contract to increase their output to satisfy this surge in demand.
PowerX Equipment proposed the ideal combination of three machines; a Powerscreen® Trakpactor 550 Impact Crusher, a Powerscreen® Chieftain 2200 Screener and a Powerscreen® Maxtrak 1000 Cone Crusher which working together process the single size limestone at the required output. Operation is simple with the as-dug material loaded by shovel into the hopper of the Trakpactor 550 which in turn feeds the Chieftain 2200 which stockpiles 2 sizes and recirculates the +20mm oversize directly back into the Maxtrak 1000 which after crushing it again, feeds it back into the Chieftain for further stockpiling.
Neil Plant, the Primary Manager at Dove Holes is responsible for overburden removal, drilling and blasting, primary and contract crushing, took up the story, “The proposal from PowerX Equipment ticked all the boxes on price and we were very happy with the Powerscreen® equipment that has been supplied. Since the start of the contract, we have been delighted in the performance of the equipment and the support we have received from PowerX.”
World- beating Powerscreen® equipment:
With the combination of machines employed at Dove Holes the whole operation is finely tuned to producing the maximum output of saleable sized aggregate at a high production rate.
Trakpactor 550 Impact Crusher:
With the as-dug material being fed into the large hopper of the primary crusher in the line the Powerscreen® Trakpactor 550 Impactor is an ideal crusher for processing soft to medium-hard primary materials like limestone.
Material is fed into the large feed hopper which is common on both the vibrating grizzly feeder & live pre-screen versions, both of which feature a selectable crusher bypass facility & optional fines discharge conveyor. With up to 500tph of output potential, load sensing, ensures the wide crusher inlet opening receives a continuous feed of pre-screened material, avoiding unnecessary crusher wear.
The Powerscreen® Trakpactor 550’s robust impact chamber features a twin apron, four bar rotor design, with hydraulic release aprons, hydraulic setting adjustment, hydraulic crusher overload & is driven directly off the engine via clutch for optimum fuel economy.
Powerscreen® Chieftain 2200 Screener:
At the centre of the screening operation at Dove Holes the Powerscreen® Chieftain 2200 2 Deck Screen processes large volumes of high specification products with maximum versatility. The Powerscreen® Chieftain 2200 has two highly versatile double-deck screen boxes which provide a total screening area of 19.5m2. It has a revolutionary patent pending drive system which allows switching between 2 and 4 bearing with bolt-on parts. The maximum variability of the Chieftain offers improved capabilities over its class rivals, especially in sticky scalping applications. User benefits include a quick set-up time (typically under 30 minutes) with hydraulically folding conveyors and track mobility. Its high aggression screen boxes, manage dirty, sticky material with ease.
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