A 10 ft OmniScreen, the largest of its kind in the world, has been supplied to Xstrata Chrome Kroondal by minerals processing specialist IMS Engineering. It was installed during December 2005 and will be instrumental in chrome ore processing at the operation near Rustenburg, in the North West.

Xstrata plant engineer Johan Hattingh says that the 10 ft OmniScreen is the ideal screen for the chrome ore beneficiation facility, which is currently being upgraded to process up to 300 tonnes of chrome ore an hour.

The OmniScreen’s high acceleration combined with its modular design and linear vibration movement enable it to process higher tonnages and has proved of particular benefit in difficult-to-screen applications, where its high gforce minimises blinding and pegging of the screen bed.

The OmniScreen consists of modules that can be arranged in various configurations to obtain optimum performance. Each module can vary in terms of the type of screen, slope and vibration amplitude. The standard linear vibration movement is created through locating the vibrators on the sides of the screen with the counterweight shaft parallel to the side and inclined 45O to the horizontal plane.