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The Prevention of Nation on Mining Pollution

22 March, 2013 at 5:24 am in Construction

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At Shapfell, the first stage in the production of lime is the quarrying of the limestone itself.

The quarrying of the limestone takes place on a 47-hectare site, one mile east of the Lime Works.

Drilling and blasting in the quarry are undertaken by sub-contractors, under the strict control of Shapfell Quarry Management.

The average face height is 18 metres and blasts of between 10 - 30,000 tonnes of stone are carried out.

The shot stone is loaded and transported by dump trucks through a series of internal roads to the Crushing Plant.

In the crushing plant, limestone is crushed in a Primary Jaw Crusher, screened and then transported to the Secondary Roll Crusher.

Further screening takes place, with the small material being used primarily in the iron making process or sold locally as stone products.

By understanding which condition monitoring technique is appropriate for maintaining each piece of machinery or bearing, we can maintain output, efficiency and profitability of the plant at all times.

Our own maintenance team has also been able to learn from CNES engineers'.

CNES is also helping Shapfell monitor and maintain blower systems at the site.

The blowers supply combustion and cooling air to the lime kilns, so are critical.

If they seize up due to excess dust particles building up on the surface of the rotor blades, the equipment can break down, causing downtime and disruption to production.As the professional manufacturer of complete sets of mining machinery, such as stone crusher plant, Henan Hongxing is always doing the best in products and service.

Patrol monitoring of the blowers, using vibration monitoring and acoustics techniques, again, means that CNES is able to predict faults before they cause serious damage to the blowers and losses in production.

Other companies in the quarrying, mineral processing and cement manufacturing sectors are using CNES technical expertise and subcontract manufacturing services to monitor critical plant and also to refurbish existing equipment.

By carrying out regular condition monitoring checks on critical rotating plant and machinery, CNES has helped the Shapfell limestone quarry in Cumbria maintain its output, efficiency and profitability

The CNES condition monitoring team has been working closely with Cumbria-based Shapfell Lime Quarry for more than 12 years now, providing regular (monthly) patrol monitoring at the site, using a range of condition monitoring equipment and techniques, including handheld acoustic monitoring devices and vibration monitoring systems.

On a recent patrol monitoring visit, an engineer from CNES discovered unusually high readings on the primary crusher at the site, which raised concerns.

Through further investigation using acoustic and vibration analysis systems, the CNES engineer discovered that the unusual noise levels and irregular readings were related to a fault on one of the main bearings of the primary crusher, which had been running for more than 30 years.

Significant wear and damage were found on the inner raceway of the bearing.  

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