Screen panel development at NSW Gold Mine
A major NSW Gold Mine was having problems with excessive and rapid wear of their polyurethane screen panels.
The screen deck is a Schenk 3.6m x 7.3m single deck flat vibrating screen which is situated at the discharge end of a large Semi Autogenous Grinding Mill.
Less than 3 weeks wear life from 63mm thick blank poly impact panels and 12 x 38mm aperture screen panels was normal on the feed end.
The blank poly impact panels were replaced with 80mm thick blank Screentek rubber panels. Wear life improved to more than 12 weeks with the rubber panels. A simultaneous trial of Screentek ceramic rubber composite panels was also undertaken in the impact feed zone. At the time this photograph was taken the composite panels had been in service for 6 months and are expected to last for many more months to come.
The polyurethane screen panels in the main screening area also only last around 3 weeks before replacement is necessary. Screentek rubber panels average around 15 weeks in the same position.
The results of the screen trials to date are :-
Impact panel – rubber - wear life increased from 3 weeks to 12 weeks savings $19,500 pa + labour and downtime
Impact panel – composite - wear life increased from 3 weeks to 29 weeks and still going. Savings over $26,000 pa + labour and downtime
Screen panel wear life increased from 3 weeks to 15 weeks with rubber
Savings $3,300.00 per screen panel per annum + labour and downtime
It is quite common for equipment manufacturers to fit polyurethane screen panels on their screen decks regardless of the application. This is largely due to a lack of viable alternatives for a clip in modular rubber system or alliances between screen manufacturers and screen media suppliers.
Sometimes, due to heavy impact and large feed size the application does not suit poly and rubber is a more appropriate material to use.
Screentek have a bolt-on or clip-on modular panel system in both rubber and polyurethane to suit most applications from dewatering to heavy-duty screening.