At Dene Quarry blasted limestone rock is transported to the primary crusher feed hopper and the material is fed on to a five roll grizzly screen and is scalped to 75mm. The scalpings are conveyed to a screen from where the oversize is returned to the discharge from the primary crusher, which has crushed the oversize from the grizzly screen.
A variety of different sizes of aggregate are produced for stocking or feeding to the Barber Green asphalt plant for the production of coated materials, or to the grinding plant for the production of powders. Site won or imported aggregates, binders and fillers are utilised to make coated materials such as asphalt. Direct fired oil burners are used to dry and treat aggregates for the production of coated materials.
The asphalt plant and the grinding plant are fitted with dust arrestment equipment and are required to comply with an emission limit of 50 mg/m³. Emissions testing is undertaken annually.
The site is currently mothballed, however, the permit is still operational.
(Photo courtesy of Tarmac Ltd)