S E Davis increase their recycling capabilities with the help of Linatex.

S.E. Davis & Son is a family owned and operated business that has been located at its 16 acre site in Astwood Bank, Worcestershire for the last 70 years.

There are several distinct, but complimentary operations within the business. From their site they offer the widest range of landscaping materials in the area. They also hire out heavy earth moving plant with operators or as self-drive; and have extensive specialist experience offering crushing and screening services to the quarrying and demolition industries.

Their involvement in recycling has recently taken another step forward with the development of a mobile aggregate washing system. Considered almost unique the mobile system does not rely on a constant supply of clean water for washing, or the need for vast settlement lagoons in which to dispose of the used water.

The new mobile plant incorporates a water recycling unit that allows full recycling of the water in the system. This increases the proportion of re-usable products that are produced, and is fully mobile allowing materials processing on clients' sites.

Linatex expertise has provided the technology to allow the new system to accommodate two very different duties, to treat the solids and reduce the silt (-75micron) content.

The duty requirements accommodate surface dressing - 8tph of solids associated with 100gpm of water and granite dust and 50tph of solids associated with 300gpm of water. With dry SG of solids at 2.6, and all -4mm material; approximately 10% of this material, passing 75 micron with approximately 180gpm of overflow water, is fed to the water treatment unit.

The waste surface dressing material which is fed into the system is a very aggressive, course and angular material. To provide superior operational efficiency and wear life Linatex abrasion resistant linings were installed throughout the system, including the pumps, hose and cyclones.

The process is fairly simple; operating at 80tph waste material is delivered into the hopper of a mobile 20 x 5 2-deck rinsing screen. From this screen 10-4 and 20-10 material is fed to separate stockpiles. The remainder of the washed material is then gravity fed to a Linatex tank and then pumped to the Linatex G4 Hydrocyclone and fed over a dewatering screen which supplies sand to stockpile. Dirty water is then pumped into the stirrer tank and dealt with by the mobile centrifuge. Clean water back from the centrifuge is then delivered to the water storage tank.

Linatex supplied two G4  Hydrocyclones, model GEN250 and GEN375 with support mounted over the dewatering screen and 80mm and 150mm overflow pipework to the collecting tank.

A collecting tank complete with two outlets to suit pumps with 50mm and 150mm suction pipework to the pumps. Final elements included two Linapump models 50/50 and150/125 with 50mm and 125mm feed pipework to the cyclones.

Paul Davis - Director, commented, "We are very pleased, Linatex have been very helpful and their skilled staff have used their expertise to tailor a solution to suit the application. The equipment is very reliable and the plant is performing exactly as required."

The new mobile aggregate washing plant is proving very popular for the recycling of road chippings by local authorities and their contractors with the unit recently employed as far as Norfolk.

Further Information:

Linatex Ltd
Wilkinson House
Galway Road
Blackbushe Business Park
Yateley
Hampshire GU46 6GE 

Tel:  01252 743000 
Fax: 01252 743030

Email: kirsten.corney@linatex.com 
Web: http://www.linatex.com/