trommel
noun
trom·mel ˈträ-məl 
: a usually cylindrical or conical revolving screen used especially for screening or sizing rock, ore, or coal
Example Sentences
Recent Examples on the Web On the other end of the property, volunteers fed yard trimmings into a giant metal trommel, the rotating cylinder sifting out big sticks and other extras. 
James Rainey, Los Angeles Times, 16 Mar. 2022 The Lewis crew begins sluicing and clocks its first gold weigh; Freddy and Juan fiddle with a massive trommel; Dakota Fred returns with a lead on virgin ground; Christo visits the Lewis claim; a surprise announcement divides Dustin’s crew. Washington Post, 26 Nov. 2021
James Rainey, Los Angeles Times, 16 Mar. 2022 The Lewis crew begins sluicing and clocks its first gold weigh; Freddy and Juan fiddle with a massive trommel; Dakota Fred returns with a lead on virgin ground; Christo visits the Lewis claim; a surprise announcement divides Dustin’s crew. Washington Post, 26 Nov. 2021 Word History
Etymology
German, drum, from Middle High German trummel, diminutive of trumme drum — more at drum
First Known Use
circa 1877, in the meaning defined above