DUO provide new wash plant for CEMEX � Angerstein Wharf.

Angerstein Wharf is a key site for CEMEX due to its strategic location in London. Last year their 16,000 tpw plant burnt down meaning a shortfall in supply to the London market, and CEMEX without a wash plant.

CEMEX approached DUO to provide a complete aggregate processing plant to work in conjunction with their existing water management system. With an impressive range of capabilities and support structure, coupled with a quick turn around time DUO were successful in their bid to supply a 16,000 tpw wash plant.

The plant designed to cope with 16,000 tonnes per week of sea dredged ballast fulfills the requirements of CEMEX and produces 10mm, 20mm and a concrete sand, with the +20mm being crushed by a Pegson Maxtrak 1000 cone crusher and re-circulated.

Operation
This high performance plant is fed by a wheel loader into a 20 tonne feed hopper with a remote control tipping grid; material is then transferred onto an M100 feed conveyor. This conveyor feeds the material onto a 16 x 5 full rinser which is fitted with polyurethane modules on both the top and bottom decks. The material is then injected with water through eight spray bars on both decks whilst travelling over a high performance vibrating screen. The top deck of this screen rejects the entire +20 mm product and delivers this on to a T4026 conveyor to be crushed by a Pegson Maxtrak 1000 cone crusher. This material is then fed back on to the primary feed conveyor for processing.

The + 5mm to 20mm product discharged onto a T6532 Conveyor is then fed onto a 16 x 5 dry screen for sizing; with the 10mm and 20mm being stockpiled by T5032 conveyors.

The -5mm is fed into a Powerscreen Fines Master 120 where it is dewatered. Although the requirement of CEMEX called for only one concrete sand the Fines Master is capable of producing 120 tph of one or two grades of sand. (Renowned for maximum retention of fines and the dryness of the final product, this market leading Fines Master 120 machine was specifically requested by CEMEX).
The concrete sand from the Fines Master is stockpiled via a T5032 conveyor. Foul water from this plant is then pumped into CEMEX’s existing water management plant which is positioned 50 mtrs away from the processing plant for conditioning. The clarified water is then pumped back for continued washing.

Overall
The DUO capability of being able to provide a high performance processing plant when needed was a major advantage to CEMEX who can now provide their mass market with clean aggregate. The turn around time was crucial to CEMEX who did not want to leave a supply gap within the South London market. Rigorous health and safety demands applied by CEMEX also represented a key issue addressed by DUO.

Further Information:

DUO Equipment,
1, Rye Hill Office Park,
Birmingham Road,
Allesley,
Coventry
CV5 9AB
Tel: 0845 22 22 386
Fax: 0845 22 22 387
Email: info@duoplc.com
Web: www.duoplc.com