Hewitt Robins keep the production rolling for Summerleaze.

17 Apr 2015

Leading manufacturer of quarry processing equipment, Measham based Hewitt Robins International – a TATA Enterprise, has recently supplied a replacement screen for Summerleaze at their Bray Quarry.

Founded in 1928, Summerleaze is a privately-owned company, whose origins are in the field of mineral extraction.

The extraction of sand and gravel has been at the core of Summerleaze’s operations since its foundation and has provided the financial base for subsequent business developments. Today, the Company’s principal gravel processing operations are based in the Thames Valley at sites in Maidenhead, Bray, Burnham and more recently Denham.

Over the last 80 years, sand and gravel from Summerleaze quarries have played a major part in supplying the aggregate needed for the construction of many thousands of homes, offices, schools, hospitals and roads in the Thames Valley. Over this time almost 8 million tonnes of aggregate have been processed and supplied to projects such as these.

The installation:

The new bespoke screen was supplied to replace an ageing secondary screen at the Bray wash plant. Darren Thomas, QM, commented, “We had a lot of quotes on refurbishment but in the end, it made sense to invest in a new screen. We already had a very reliable Hewitt Robins primary screen installed a few years ago so we were very happy to talk to them about a replacement secondary screen.”

Following a successful tender Hewitt Robins engineers visited the site and subsequently designed a bespoke retrofit Hewitt Robins LPE11 1.5m x 5.0mm single deck screen with carry deck. Two motors and two shafts ensured that no additional electrical work would be required. On-board motors allow complete access around the screen which is fitted with PPL Trelleborg screening media.

The whole project was subsequently completed and the new screen commissioned in a short shut-down period over Xmas by Hewitt Robins engineers.

Darren, further commented, “We scheduled the work for the Xmas period and allowed a couple of days for installation. Everything went very smoothly and the new screen was installed and commissioned within the time frame.”

The process:

With a feed of 150-200tph/hr the primary screen splits out the +10 and +20mm material and feeds oversize reject material onto the new secondary screen where the +40mm is then recirculated back into a cone crusher and +44mm fed into a jaw crusher; all crushed material is then fed back onto the primary screen ensuring that no material is lost.

The plant which has been operating since the sixties is a busy operation processing approximately 275,000 tonnes/annum of sand and gravel for the on-site concrete plant and supplying local demand.