New Linatex Sand Plant for Scorton Quarry

Working on behalf of principal contractor Whitwick Engineering, Linatex have recently installed a sand processing system for Tarmac Northern at their Scorton Quarry, (location)   Replacing an old and obsolete plant which provided a single grade of sand, the requirement from Tarmac was to improve the quantity of fines and produce two materials; fine building sand and medium concrete sand. Initial site analysis through borehole tests proved that the material was clean and course, the average sand being 40% content.

The material being processed is -5mm, which, including crushings is produced at 180 tph maximum, this being discharged from two screens.

The process required the incoming feed to be flumed down vertically to the centre of a 1676 mm dia S-Type Classifier. This handles 180 tph of -5mm at a rate of 1500 gpm. The feed passes down a control tube meeting a saucer, which causes the flow to be turned radially outwards and upwards. From this point the flow is split, fine sand tending to pass upwards and coarse sand downwards.

The course sand is then drawn from the base of the classifier by a 200/150 Linatex Linapump 111R and pumped via 200mm pipework to a 914mm HK200 Linatex Sand Separator for washing and dewatering. Separating the vast majority of the water from the sand the dewatered product provides a constant moisture content of approximately 20%, irrespective of the feed density.

This course sand separator is mounted in a tower and  provides a 3750 tonnes capacity stockpile via three Linatex lined sand discharge chutes and swivel box in a clover leaf stockpile arrangement i.e. feed one, dry one, sell one.

250 mm bore overflow pipework from the HK200 returns to the vicinity of the classifier, where a branch to the classifier provides and controls the upcurrent water at the classifier with the remainder of the flow to an existing effluent tank.

The fine sand treatment although very similar to the coarse required smaller sized equipment without classification. The fine sand overflowing the classifier is flumed down to a 2440 mm dia feed regulating sump and then pumped via a 150/125 Linatex  Linapump 111R to the HK125 Sand Separator, thus providing an 1100 tonnes stockpile capacity again via three sets of  discharge chutes and swivel box. Any overflow is again directed to an existing effluent tank.

All the feed and return pipework was mounted on trestles, which in turn supported a walkway for pipe maintenance and access to the towers which were fitted with maintenance platforms to health and safety standards.

All design, drawings, delivery, erection on prepared foundations and commissioning was completed by Linatex engineers.

Linatex Ltd,
Wilkinson House,
Galway Road,
Blackbushe Business Park,
Yateley,
Hampshire GU46 6GE 
Tel: 01252 743016 
Fax: 01252 743030
Web: http://www.linatex.com/