Tackling Conglomerate

Creagh Concrete, a long-term customer from Northern Ireland, has added a CDE R2500 feeding and screening system and an additional AggMax log washer to their existing installation at Draperstown in order to tackle conglomerate even more efficiently and rapidly than before. The combination of the new plant arrangements means that the minimum amount of mobile equipment and manpower are required and that expensive double handling is eliminated.

A percentage of Creagh’s products are generated from a challenging raw feed made up of conglomerated aggregate, sand and silts in equal proportions. This conglomerate requires high tech equipment to recover good quality sand and aggregates.

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 arrangement in order to preclude the need for a mobile jaw crusher at the face.

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 aggregates are sent to the original log washer for even more efficient scrubbing.

With the new upgrade in place, Creagh currently processes up to 150 tonnes per hour of raw feed. A VSD unit has been fitted to the first AggMax log washer to accommodate variations in the feed rate.

CDE Global,
www.cdeglobal.com