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Quick sand thanks to DUO CEMEX upgrades its sand processing with DUO

DUO was once again on hand to provide leading building materials company CEMEX with its expert knowledge and the supply of equipment to meet its needs at Angerstein Wharf. The Angerstein aggregates plant was installed by DUO five years ago as CEMEX replaced its fire damaged plant and took the opportunity to increase the site’s efficiency and capacity. Due to demand for CEMEX to further increase its supply to the construction market, it was time again for an upgrade. DUO recently completed the installation of two new sand plants to process the fines from sea dredged materials. The new sand plants, which have more than doubled the sand processing capacity for CEMEX at Angerstein, will each operate at a nominal 200 tonnes per hour, although each plant can handle a maximum of 250 tonnes per hour at peak time. DUO designed the inlet to the plants to provide an evenly distributed flow to the two plants in order to maximise their efficiency and providing total peak output of an impressive 500 tonnes per hour.

The sand plants not only provide higher output levels for CEMEX, but also a quality end product; this is delivered through the use of advanced hydrocyclone technology. This technology provides consistent low moisture content dewatering of product, without loss of useful fines and is designed to ensure easy maintenance. The sand plants receive the underflow from two Terex

Cedarapids horizontal screens; this underflow contains -5mm for processing by the aforementioned hydrocyclones. The processed sand is dewatered and stockpiled via the existing conveyors, and the used water is then processed for reuse in the wash plant to minimise water use and promote sustainability. Access to both sand plants is available via the fully galvanised support structures, which include support of the cyclones and dewatering screens, as well as steps and walkways.

When asked about the installation Fintan Mckeever, director at DUO commented: “Having installed the turnkey solution that CEMEX are currently operating at their Angertsein site, we were in an excellent position to assist them with this upgrade in terms of understanding the onsite restrictions and their existing operation.” He added “The inclusion of the new equipment was designed to utilise the footprint of the sand plants that were being replaced and to work in harmony with the existing plant.” CEMEX’s Glyn Richards, area operations manager, commented that: “The new sand plants have given the site the ability to significantly increase throughputs and ensure we continue to meet rising market demand. They have been an ideal match for the existing DUO plant." For more information visit:

October 2011 • Solids & Bulk Handling 31

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