Tema Isenmann increase the efficiency of screening for Norton Bottoms upgrade.

24 September 2014

Operational for the last 30 years Norton Bottoms Quarry has been owned and operated by Breedon Aggregates since 2011 and is situated at Brills Hill, close to the village of Norton Disney in Lincolnshire.

Due to age and a desire to improve process efficiency the plant has recently been upgraded. As part of that upgrade two screens have been installed by Roltech Engineering of Newcastle-under-Lyme, Staffordshire.

The quarry which is situated alongside the River Trent supplies high quality sand and gravel and operates as the main feeder unit with the majority of the production of 4-20mm concrete and aggregate, 0-4 sand and 0-2 mortar going internally to Breedon’s concrete plants in North and South Lincolnshire with the rest to local markets.

A 2.5m x 6.0m long inclined double deck washing screen was supplied with a separation of 20mm and 4mm through WS85 polyurethane modules, which were supplied by Tema Isenmann. Rated at 350tph this has a water in-feed of 120 cubic metres/hr and is fitted with spray bars which house a combination of Tema Isenmann standard mini fan sprays and mini flood sprays.

The second screen is a 1.8m x 4.8m long low angle dewatering screen fitted withTema Isenmann WS85 polyurethane screen media with 0.5mm x 12mm slots.This screen is rated at 200tph and processes -4mm sand and achieves a final moisture content of 7-10%.

Carl Ashurst – Operations Manager, commented, With a 30 year old plant and obvious limitations we decided to completely replace the processing element and subsequently installed a main conveyor, a double deck washing screen, dewatering screen and removed the old barrel with all the material now processed in an MEP sand plant which allows us to pick and choose whether we make concrete sand or mortar sand. The washing screen was designed to take 350tph so that includes raw material that comes up from the field as well as any recirculation that comes through the two crushers which gives us anything between 200-250tph of finished product.”

Installed in a transition period whilst operating the old plant, the new equipment was then interfaced in a 2 ½ week shut down completing the installation.

Carl further commented, “In the past we only had the choice of making two grades of sand since this plant has started up we have only made one grade of sand because it’s so efficient, and the grading’s have been very consistent”.

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