What does trommel mean?
A trommel is a rotating cylindrical screen used to separate loose materials by size. Its perforated walls allow smaller particles to fall through while larger pieces remain inside and are discharged at the end. The equipment is especially important in mining and mineral processing, where crushed ore can be sorted into valuable and waste material. Trommels are also used to screen gravel, soil, sand, and recycled aggregates. Although the word resembles an ordinary musical drum, a trommel is primarily a machine rather than an instrument. Its name comes ultimately from German, where Trommel originally referred to a drum and also to a drum-shaped sieve. The term remains relatively uncommon outside technical and industrial contexts, but it precisely identifies a distinctive form of rotary screen.
nounA rotating cylindrical screen, usually perforated, used to separate materials such as ore, gravel, soil, or recycled aggregates according to the size of their particles.
- A rotating, perforated cylinder used to screen and sort granular materials by size.
"The ore passed through a rotating trommel before the valuable concentrate was collected."
"The ore passed through a rotating trommel before the valuable concentrate was collected."
"Workers fed gravel into the trommel to separate the smaller stones."
The standard plural is trommels.
"The two trommels operated at different speeds."
A trommel is a giant drum that sorts stones by letting smaller grains tumble through its holes.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does trommel come from?
The English word was borrowed from German Trommel, a term used for a drum and for a drum-shaped sieve. German Trommel developed from Middle High German troumel, an earlier Germanic word associated with a drum or cylindrical body. Related forms exist in Dutch, Danish, Swedish, and Norwegian, reflecting a wider Germanic vocabulary for drums and drum-shaped objects.
How trommel is actually used
This is specialized terminology used in mining, mineral processing, soil screening, aggregate production, and recycling. It is uncommon in general conversation.
Easily confused with trommel
A trommel is a rotating cylindrical screen for separating materials, whereas a trammel may be a net, a scraping device, or another type of mechanism.