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Canning supply new ground conveyor system to Welsh Slate

16th July 2010

Conveyor specialist Canning Conveyor has recently supplied a new ground conveyor system for Penryn Quarry at Bethesda, near Bangor, North Wales.

Penryn Quarry which is the headquarters of Welsh Slate has been producing roofing slate since the 13th century and is one of four quarries in North Wales operated by the company which have been supplying the world with high quality roofing slate and other materials for over two hundred years

With a turnover of approximately £27 million/annum Welsh Slate are the world’s leading manufacturer of high quality roofing products which have an unparalleled reputation for durability and quality.

Canning was awarded the contract to design, manufacture and supply (under a rental agreement) a new ground conveyor and associated equipment including a steel tunnel.

The new 75 metre long, troughed belt ground conveyor supplied is driven by a SuperDrive™ motorised pulley and has been designed to accept an average of 300 tph (maximum of 400 tph) of slate with an average size between 150 – 250mm.

The new ground conveyor runs over generally level ground (with an approximate rise of 2 metres in total) part of which passes through a new 2.5 metre diameter, 6 metre long steel tunnel which was designed to accept conveyor intermediate sections. As the tunnel is situated within a haul route Canning designed the tunnel to take up to 90 tonnes in weight (the equivalent of two articulated trucks, side by side).

Driven by a 630mm diameter SuperDrive™ (partially ceramic) lagged in combi - red diamond the conveyor system included a high tension bend pulley, jib discharge drum, loop bend drum and primary and secondary belt scrapers. A discharge chute with integral crash box and hinged inspection hatch complete with all guarding completed the specification.

In addition to the conveyor installation Canning also re-sited an existing hopper/feeder all completed with the Xmas shutdown period.

The Canning SuperDrive™ motorised drum supplied for the new conveyor provides exceptional performance characteristics. Supplied pre-filled with synthetic oil, no maintenance is required other than the recommended oil and oil seal change every 30,000 hours in comparison to the use of normal oil which offers a service life of only 10,000 hours. Based on an eight hour per day working week the SuperDrive™ motorised drum needs only one service approximately every 15 years!

The project was completed successfully and in the agreed time frame. Monty Williams – Production Manager, of Welsh Slate, commented, "Canning Conveyor was very professional in the implementation of our order, which was delivered and completed to schedule, with excellent workmanship and high Health and safety standards."

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