11. One of the main process characteristics of interest is the screening rate of the trommel . 12. The remaining materials, after simple physical separation ( trommel screen ) has several valuable uses. 13. Trommel screens are more mechanically robust than vibrating screens allowing it to last longer under mechanical stress.14. However more material can be screened at once for a vibrating screen compared to a trommel screen. 15. Apart from screening rate, another characteristic of interest is the separation efficiency of the trommel screen. 16. Gold was recovered in a rotating long trommel screen with diameter and 12.5 % grade. 17. Other applications of trommel screens can be seen in the screening process of composts as an enhancement technique. 18. Besides this, the food industries use trommel screens to sort dry food of different sizes and shapes. 19. Viscous and sticky materials are easier to be separated using a roller screen than with a trommel screen. 20. Vermeer also purchased Wildcat Manufacturing in Freeman, South Dakota, a manufacturer of trommel screens and compost turners.
