This piece of processing equipment consists of a perforated cylinder that rotates at an angle. Raw material is fed into the elevated end, and as the drum turns, undersized particles fall through the screen while oversized rocks tumble out the lower end. It is heavily used in placer mining, quarrying, and wash plants to classify material before further processing.
Heard on the job
The trommel screen is blinded with wet clay again, so shut down the feed and get the pressure washer.