"The newly launched modular wash plant Aggresand" by Terex Washing System's (TWS) brings together aggregate and sand washing on one modular chassis, producing three aggregates and two sands on one machine.

The main objective in developing the Aggresand plant was to meet our customers' needs for a modular system that can efficiently wash and produce multiple aggregates and sands within one machine. The Aggresand plant's design achieves this by providing a throughput capacity of 250 tph as well as having quick set-up time allowing the plant to be erected in one day. Through the expertise of dedicated TWS engineers, the newest modular plant is also designed for efficient transport by fitting into six shipping containers. During the packing process at the TWS factory the containers are loaded and arranged in a specific manner to help speed up installation time on site. Quick set-up time is also achieved through essential 'plug and play' plumbing/pipe work and electrical wiring, compared to traditional methods where this work is carried out onsite after installation.

Elaine Donaghy, Marketing Manager, TWS says, "TWS is delighted to officially launch the Aggresand washing plant after what has been an eagerly awaited event for TWS distributors and customers. Following the event, we are already witnessing a huge surge of enquiries. The Aggresand plant will undoubtedly set TWS apart from other providers in the market, and this particular system will revolutionise the wash plant market by continuing to serve our customers' needs around the world."

The first Aggresand machine is working successfully in Dowling's Quarry, Abbeyleix, Co. Laois for the past six weeks and is processing to date glacier sand and gravel material formed during the ice age with consummate ease. Quarry owner, Humphrey Dowling, commented, "We are delighted to be the first quarry to install and operate the world's first-ever Aggresand, which is truly is a superb wash plant. This plant ultimately replaced an older Terex wash plant that was installed 13 years ago, so far I am very impressed with the functionality of the Aggresand. The plant arrived on site and was installed in approximately 10 hours. I like the idea of the modular aspect, allowing it to be moved to another site later if the throughput currently being achieved on the plant is excellent and the quality of the aggregates and sands being produced is very impressive. The high performance two deck vibrating grid allows us to feed material directly from the face of the quarry, at 200 mm, large material is scalped off while the minus 50mm material goes straight into the wash plant. This eliminates the need for expensive pre-screening of the feed material."

The Aggresand plant at Dowling's Quarry is fitted with a 12' double deck vibrating grid with 100 mm Bofor bars and 50 mm woven wire mesh, this particular plant separates 0-40 mm to the wash plant that gives three aggregate materials and two sand. Reject material from the live head is stockpiled and later crushed when accumulated into stockpiles of 50,000 tonne, then crushed into 6f2 material via a Terex crusher. On the bottom deck the <50 mm product is delivered by the feeder belt to a 1,000 mm wide electrically driven inclined feed belt. This wide conveyor is fitted with an integral wash box to pre-soak the material and delivers the material to the full width of the screen thus utilising the full screening area. The 16'x5' (4.9 m x 1.5 m) three deck screen is electrically driven producing an aggressive 6 mm throw and is fitted with eight individually controlled spray bars on each deck. The sized and rinsed aggregates produced by the screen are stock piled on three integral 9 m stockpilers. The dual sand plant includes two rubber-lined centrifugal pumps and two heavy duty rubber-lined cyclones which remove silt (<75 micron). The silt-free sand is delivered to a split 12x5 screen to produce two grades of dewatered (12 per cent moisture) silt-free sand. The sand stockpilers are radial powered through electrical wheel drives and have an impressive stockpiling capacity of 350 cu m. The end products are used as follows: 6-14 mm, 14-22 mm, 22-40 mm. The 0-3 mm sand is used for plastering and block making, and the 0-5 mm sand is used in the production of concrete. Humphrey said, "My favourite feature on the entire plant is the radial sand stockpiling conveyors which provide great capacity and save on re-handling. The sand is also coming off the conveyors extremely dry. I also like the hydraulic operation of the feeder and the vibrating grid which works well and gives great levels of control."