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MEI Online: Sizing & Classification: Latest News: January 24th 2005


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:: Sunrise Dam goes ‘Bananas’ for Metso Minerals

Following the increasing popularity of banana screens in Australia’s gold mines - offering an increased screen size but a similar footprint to a smaller capacity screen - contractors are turning to Trellex Screening Media to withstand the wear and tear caused by the high material velocity at the feed end of the screen; with Trellex Panelcord providing improved wear from 12 days to more than four months.

Although a relatively new concept in the Australian mining industry, banana style screens have rapidly gained popularity in the gold mining sector - offering a higher capacity screen with a similar footprint to a smaller conventional screen.

Contractors soon recognized the need for Trellex Screening Media to meet the abrasive wear and tear caused by the high material velocity of the gold ore, particularly at the screen feed end.

The gold mine, Sunrise Dam, owned by AngloGold Ashanti has successfully completed trials for the Trellex Panelcord media system extending the life of screen panels from 12 days to more than four months.

The gold mine, located some 530 km northeast of Kalgoorlie and owned by AngloGold Ashanti Ltd, has upgraded its treatment plant to increase throughput to almost 3 million t/yr. The expansion included a Nordberg C Series jaw crusher from Metso Minerals, plus additional grinding and leach capacities.

Initial trials fitting four rows of Trellex Panelcord at the feed end, proved an immediate success. With no transverse support structure on the screen, the panels were designed by Metso Minerals with an internal reinforcement within the panel - a first time installation in a banana screen in Australia.

The Trellex Panelcord rubber system is a self-supporting screening medium for use in coarse and medium screening applications. It features an integral steel and cord reinforcement vulcanised within each panel. Its moulded apertures are available in a wide range and the shape is designed to minimize the risk of pegging, maximizing throughput. Thicker panels also incorporate rider bars on the upper surface to allow small particles to pass through the apertures and keep the larger lumps off the screen aperture surface therefore increasing the life of the panels in severe applications. The system has been designed to handle ore up to a lump size of 700mm.




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