Contractors World
 

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Contractors World - 2015 Vol 4 No 1

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CMB International gets
CEMEX Northfleet back on track

CMB International has just completed a complete refurbishment of a Cedarapids twin-deck 20 m x 6 m primary rinse screen at CEMEX UK’s Northfleet operation.

Owned and operated by CEMEX UK, Northfleet Wharf is a marine aggregates facility situated on the south bank of the Thames at Northfleet in Kent.

The very busy wharf supplies to an on-site ready-mix plant, bagging plant and a block making plant and also external ready-mix plants in the area.

Material arriving from the Thames estuary and the south coast the dredged material is fed from stockpiles to the 350/400 tph plant which features twin aggregate processing lines.

Although now eight years old the plant has performed well over time but the screens have had consistent on-going issues in recent times and with a primary rinse screen that was now in desperate need of attention the Northfleet team awarded the contract to CMB after inviting several companies to tender.

An easy change

Michael Hinson – QM for CEMEX, commented:

As we have more or less an identical plant to Angerstein Wharf, we currently have two ‘spare’ screens in circulation so if we have any issues we have a ‘spare’ to drop in while we sort the issues out with the problem screen.

This spare facility made the change much easier so CMB International subsequently removed the screen and took it back to their workshop and re-engineered the whole screen, including a new screen box, new assemblies and the incorporation of a shaped doubler plate down the full length of the screen, on both sides.

Michael further commented,

CMB strengthened up certain parts of it and they changed the framework completely. They also changed the throw on it, by reducing the G-Force, to reduce wear. To be honest since CMB reinstalled and commissioned it the screen hasn’t missed a beat! We have changed the oil on it twice just to make sure everything was OK. We are very pleased and considering it was the first work that CMB have done on our screens we are delighted with the results.

With the removal of the diagonal cross members and the height between deck and cross members increased.  The decks are now thermally stress relieved with the result that the decks are now extremely strong.

The new refurbished screen was reinstalled in two days, everything went very smooth with the CMB engineers commissioning it within the scheduled time frame.

CMB International


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