Another great success for DUO!
Another DUO Unit Cost Processing project, this time at Hatfield Quarry, has proved to be a great success. Owned by CEMEX, Hatfield Quarry in Hertfordshire is a sand & gravel quarry which produces approximately 200,000 – 250,000 tonnes of aggregate per annum.
CEMEX has enjoyed 7 years of successful production on a Unit Cost Processing basis at the site. The success can be in-part attributed to DUO’s expertise in aggregate washing and their ability to design bespoke installations that meet not only the requirements from a production point of view but also to adhere to mobility, height and noise requirements that directly impact on planning regulations.
The mineral on site has a silt content in the region of 10 - 15%; a factor that required special consideration in the designing of the plant to ensure that processed material meets the high standards that CEMEX requires of its aggregate. The bulk of the washed aggregate is delivered to the on-site concrete plant. The remainder of the washed sand & gravel is split between an on-site bagging plant, other CEMEX concrete plants and the external market.
DUO designed the plant to include a prewash to reduce silt content prior to being feed to a Finesmaster 200 with coarse fractions being processed primarily through a Commander Rinser, Powerscrub 120R logwasher and a second Commander Part-Rinser and stockpiling conveyors. The installation also included a Maxtrack 1000 cone crusher to reduce oversize and maximise concreting aggregates.
As with all DUO installations the configuration of the installation and day-to-day processes of running of the plant were of bespoke design. The material analysis results, required production levels and the required specification of product were all factors of consideration in the designing of a plant that met all of the necessary requirements.
CEMEX recognised the performance and cost effectiveness of a DUO installation and chose to purchase the plant.
