Aggregate Industries chose Hewitt Robins.

Owned and operated by Aggregate Industries, Newbold Quarry is located at Barton under Needwood, near Burton-on-Trent, Staffs.

Supplying sand and gravel to local markets the quarry has recently installed a new processing plant. Within the sand classification and deligniting plant, designed and built by MEP Ltd of Salisbury, Hewitt Robins International (HRI) was awarded the supply of the screens.

Five screens were supplied for the project; comprising of a HRI 2200mm wide x 4200mm long LPE-11 horizontal vibrating screen with a duty of 160tph of -6mm sand and water; 60% solids by weight to separate excess grit.

A HRI 1800mm wide x 6000mm long LPE-9 horizontal vibrating screen with a duty of 100tph of -1mm sand and water; 50% solids by weight to separate coarse lignite with fine sand and water passing through. Three de-watering screens (angled at 5°)were also supplied which included a HRI 2500mm wide x 6000mm long E-13 de-watering screen with a duty to de-water 350tph of -6mm (concrete) sand with up to 200m3/h of water. A HRI 1600mm wide x 4800mm long LPE-9 de-watering screen with a duty to de-water 100tph of -1mm (building) sand with up to 60m3/h of water. A third HRI 1000mm wide x 2400mm long LPE-6 de-watering screen, with a duty to de-water 6tph of -0.25mm sand with up to 6m3/h of water captures any residual sand.

All five screens were twin shaft, four bearing single-deck machines equipped with Eliptex^TM vibrator units and fitted with a 450mm feed box and 150mm discharge lips both complete with10mm thick P.U liners, support springs, spring base plates, v-belt drive and motor pulley.

The Eliptex^TM vibrator mechanism is acknowledged as the most reliable in the industry. Imparting a three-way motion, with horizontal, vertical and elliptical components, product capacity and efficiency is maximised. The mechanism is of simple construction, rugged design and is built from high quality components assuring extra long life. The elliptical motion provides higher capacity and cleaner material and is available in either oil or grease lubrication.

All screens were successfully delivered on time; Martin Owen - Engineering Manager at Aggregate Industries commented,"the Hewitt Robins screens have lived up to their reputation for sturdy and reliable operation in this high tonnage application".

Further information:

Hewitt Robins International Ltd,
Huntingdon Court,
Huntingdon Way,
Measham,
Swadlincote,
Derbyshire, DE12 7NQ
Tel:  00 44 (0)1530 272799,
Fax: 00 44 (0)1530 272787,
Web: http://www.hewittrobins.co.uk/