Rock Products

MAY 2018

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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Page 46 of 75 ROCK products • May 2018 • 45 AggMax 251. Final sand product in hand. wanted to avoid double handling and use dumpers to feed the plant and increase efficiency." The Solution The introduction of a CDE R2500 feeding and screening system made the use of 40-tonne dumpers possible and did away with the need to use shovels for transport from the pit. The R2500's apron feeder can handle even the most difficult of feed materials and the heavy duty P2-75 Infinity screen that forms part of the R2500 removed the need for a mobile screener at the face. Additionally, after consulting with CDE, it was agreed that the plant layout would be redesigned so that Creagh's existing jaw crusher could be incorporated into the feeding arrange- ment in order to preclude the need for a mobile jaw crusher at the face. Crucially, double handling has been taken out of the equation. A second AggMax 251 was incorporated into the washing circuit and is now used to break up the conglomerate and release the sand, which is then removed before the aggre- gates are sent to the original log washer for even more efficient scrubbing. Best Use of Resources With the new upgrade in place, Creagh currently processes up to 150 tph of raw feed. A VSD unit has been fitted to the first AggMax log washer to accommodate variations in the feed rate. The company produces high quality concrete sand and aggre- gates, which are transferred to the existing crushing circuit to enhance production of 20-mm and 10-mm aggregates and add to the overall sand production. Des Crawford, Northern Ireland area sales manager for CDE, comments on Creagh's decision to tackle all available feed material more efficiently. "With planning permission for new deposits of sand and gravel being so difficult to attain, it is extremely important to gain maximum production from existing resources." Quarry Manager Colm Scullion advised: "These latest innova- tions should extend the life of the quarry by at least 10 years." Creagh's installation is a landmark for CDE in terms of engi- neering innovation and design solutions, leaving them able to tackle the most challenging materials to produce high-quality products with minimum waste." Information for this article courtesy of CDE Global, Creagh Concrete co-founder Gerard McKeague and CDE sales rep Des Crawford with the R2500 and P2-75 Infinity screen.

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