Andritz - Model DLS - Linear Screen - Revolutionary Screening
The highly successful linear screen has proved itself in that most gold projects incorporate this unit for pre-screening, de-sanding, carbon scavenging, and de-sliming of loaded carbon. The linear screen has been further developed for a variety of industries, ranging from pyrometallurgy to sewage and effluent. The linear screen by ANDRITZ Delkor (Pty) Ltd. is proven in the removal of tramp oversize from process feed streams and has found applications in classification at fine apertures. The acceptability of this screen, for use in gold plants using the carbon-in-pulp (CIP) process, is confirmed by the 350 units which are in operation worldwide.
A feed box, which is perforated at the bottom, is positioned above the cloth. The feed enters the feed box, from where it passes onto the cloth medium. The oversize fraction is retained on and travels on top of the revolving cloth and is discharged on the drive roller end into a discharge chute. The undersize fraction passes through the aperture of the cloth and gravitates into an underpan.
Many ANDRITZ linear screen contracts have involved retrofitting the linear screen in the place of conventional screening systems. The following major advantages are evident:
Eliminates the possibility of stress cracking on structural steelwork.
- On average three to six months on milled gold slimes
- Cloth replacement in a maximum of 30 minutes
- Efficiencies of over 98% have been measured.
- Low power consumption
The prototype at Afrikander Lease has operated at over 99% availability.
Lower noise levels
Noise levels are considerably lower than vibrating screens, and this contributes to operator comfort.
There is a large range of screen cloths to choose from, allowing significant operating flexibility.
Lower maintenance cost
In general, a maximum of 5% of capital cost can be saved per annum.