Successfully processing material at Roan Edge for 10 years.

A significant milestone has been achieved by DUO Processing with ten years of successful contract crushing, screening and washing at Roan Edge Quarry…

The 42-hectare site at Roan Edge has 14 million tonnes of reserves of gritstone. Known as siliceous sandstone this material has a high polished stone value of 60, making it useful for roadstone and other highly desirable materials for the UK’s roads infrastructure and other industries for years to come.

Operating under a crushing, dry screening and washing contract DUO Processing have provided a comprehensive unit cost processing facility which was tailored from the outset to suit the customer’s needs.

Terex® Aggresand 206 Modular Wash Plant:
Featuring a range of state-of-the-art machinery the washing process at Roan Edge is centred around the ‘world beating’ Terex® Aggresand 206 Modular Wash Plant which combines aggregate washing and screening with sand processing on a modular chassis.

In its readily portable format, the Terex® Aggresand 206 Modular Wash Plant is particularly suitable for green-field applications, contractor use and temporary planning permission sites. However, operators more used to static installations will still appreciate the small footprint and minimal site preparations required. In all cases installation time is significantly less than conventional builds thanks to the high level of factory pre-fitting and connections.

At the Roan Edge operation blasted gritstone is loaded by a 50 tonne excavator into several Powerscreen® crushing and screening plants to make a -14mm material. This material is then moved into a dedicated stockpile area where it is fed into the Terex® Aggresand 206 Modular Wash Plant to make clean saleable 14mm, 10mm, 6mm aggregates and a washed sand.

A totally managed contract:
DUO Processing have run, controlled and managed the Roan Edge operation successfully for over 10 years with a team of highly skilled plant supervisors and industry professionals. Supervisors on site monitor the wash plant, water treatment plant and supervise the crushing operations. Plant operators operate the plant machinery across the whole site. Making it run efficiently and to its maximum capacity.

Martin McWilliams – MD of DUO Operations, commented, “This site is producing over 1200 tonnes per day, five and a half days a week and is typical of our “Two Working as One” ethos, we believe that teamwork with the customer, is vital in ensuring that needs are met. We will always, where possible, do what is required to adapt to meet changes in a processing situation. It’s been a total success, ten years of minimising the input to maximise the output.”

A fleet of world class machines:
To achieve this milestone a team of Powerscreen® jaw and cone crushers and screeners has provided a constant 1200 tonnes of crushed output daily.

This has been supported by a range of Doosan equipment, including loading shovels, excavators and ADT’s.

Completing the process, aggregate washing has been delivered by the innovative Terex® Aggresand 206 Modular Wash Plant alongside a thickener tank and filter plant press.

Health & Safety:
Health and Safety is paramount for any DUO Processing managed sites. With our in-house H&S division, STAR; the site is managed stringently, with all procedures adhered to, making Roan Edge a safe working environment for all operatives and visitors.


About DUO:
DUO is a market leading company that provides the aggregate, recycling and material handling industries with a comprehensive package of complete processing solutions, including specific industrial applications for the quarrying, recycling, bulk handling industries and transport infrastructure.

With several divisions DUO, can offer a total solution for your processing needs.

DUO Operations:
This division focusses on four main areas, equipment rental, civil engineering, earthworks and processing.

Equipment Rental:

Takes the ease out of renting your construction equipment, if you need top quality construction equipment on a medium or long-term contract, equipment is readily available, from large excavators to ADT’s or loading shovels to rigid dump trucks. Doosan, Bell, Komatsu and CAT are just some of the high-quality brands we can supply to suit your needs.

Civil Engineering:
Our civil engineering team has experience across various sectors and have the know-how and experience to undertake the largest, most intricate projects that you have.

Including specialisation in road building, landfill and waste management, land drainage and utilities installation, commercial land development and flood protection for all types of civil engineering.


We can offer earthworks and restoration solutions when your projects need to be turned around on-time and on-budget, providing our customers with load and haul options, restoration, soil stabilisation, waste, drainage, groundwork, formations, utilities and logistics solutions.


DUO Processing:
Typical operations like Roan Edge where we focus on offering a unit cost processing facility of full aggregate production, this removes the stresses and strains for you as there are no surprise costs and it is calculated on a fixed price-per-tonne basis for the finished, processed material.


DUO Equipment:

DUO Equipment can supply you with quality equipment to deliver a complete turnkey project for the aggregate industry. The Powerscreen® range of mobile equipment offers the user greater flexibility than traditional static installations. Powerscreen® equipment can be used to open up the property, set up the required infrastructure and then process the mineral within the site, thus dramatically improving your return on investment.

If you require a static structure or high-quality wash plant, we can provide you with Terex branded equipment to suit your requirements, from mobile wash plants to rinsing screens, log washers to sand plants and much more.

DUO Manufacturing:
Our in-house manufacturing facility allows us to provide a total turnkey solution for all individual projects. Providing a complete package from initial design, manufacture and installation, all of which is delivered by working to the highest levels of safety. Whether a bespoke design requires hoppers, conveyor systems, structural steel work, chutes or walkways, we are always able to provide whatever is necessary.

An integral part of this division is the provision of a unique electrical service to oversee your entire electrical package.

Roltech Ltd is part of DUO Manufacturing this sub division specialise in bespoke solutions in design, fabrication, installation and maintenance of material handling, bioenergy, recycling and water treatment plants to quarries and factories, and including concrete batching plants, waste to energy projects, waste recycling, dredging equipment, ducting and pipework and concrete ready-mix mortar trucks.

DUO Africa:
DUO Africa are our official Powerscreen® and Terex® representative selling equipment and support across the African region.

Based in Ghana the company has extensive operational experience and offers individual plant options from bespoke design to turnkey operations.

When things go wrong you need to have the confidence in prompt service. Service support is key, we cover the length and breadth of the UK with our highly skilled team of engineers ready to keep your operation up and running to minimising your downtime.

Associated Businesses

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