Hadleys case study

Material source:

Excavation waste from construction sites.

Equipment installed:

Main components included:

  • Commander 1400 Hopper
  • Feed Conveyor
  • 16 x 5 Rinsing Screen
  • Logwasher c/ with Dewatering Screens
  • Finesmaster 120 Sand Plant
  • 16 x 5 Dry Screen
  • Bivitec Pre- Screen System
  • 9m dynamic Thickener
  • Clarified Water Tank
  • Flocculent Mixing and Dosing Tank
  • Multiple Conveyors.

Project requirements:

A 180tph wash plant was required by Hadley’s to achieve desired production levels of building sand, sharp sand, 10mm single sized gravel, 20mm single sized gravel and 40mm single sized gravel.

Duo’s solution:

After a full assessment of Hadley’s requirement and material capability, Duo devised a plant solution that could sort and rinse screen useable material -125mm, and reject what was oversized.

Any material greater than 40mm could also be rejected and taken by conveyer to stockpile, whilst all -40mm material could be fed to a Powerscreen Powerscrub and graded using a dry screen into three sizes of 10mm, 20mm, and 40mm.

Foreign materials could be removed from the waste water and stocked, with the water/sludge collected into a sump tank before being processed by a Fines Master 120 to produce two stockpiles of fine and sharp sand. Once materials have been extracted, treated waste water could be clarified and reused.

Project Success:

The installation facilitated the production of the five product sizes that Alan Hadley Ltd. required at a tonnage that met the desired production rates. The high-quality product meets the following European standards: BS EN 12620 (aggregates for concrete); BS EN 13139 (aggregates for mortar); BS EN 13242 (aggregates for unbound use); BS EN 13285 (unbound mixtures). The products also meet the Highways Agency Specification for Highway Works (SHW).