The manufacturer calls this device a trommel screen:
https://is-e.pl/mobile-trommel-screens/
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Trommel Screen Brushes
Our heavy duty brush systems are made to prevent jammimg and clogging of the screening drum. Our complete selection of the trommel brushes cover all screening drum brands and models on the market.

https://www.environmental-expert.com/products/trommel-screen...

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Note added at 57 mins (2022-02-01 13:46:06 GMT)
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Trommel Broom and Brushes
Trommel Brooms – Screen Cleaning Brushes
Keep your trommel working at peak efficiency with our polyester trommel screen brushes. Instead of using a softer polypropylene, polyester bristles are used for their rigidity and strength. The longer bristles can be spaced on its core tube at various intervals. This spacing gives greater variety in cleaning power for a multitude of screen sizes. Just like tube brooms and wafers, trommel brushes are available at different diameters. Bristle length and core length can also be customized as needed. These brushes are a specially made for each trommel it cleans. Contact our expert staff and let us help you find the perfect brush today!

We can make trommel brooms at any size for any machine! Use our contact form and send us the specifications for your trommel broom. We'll contact you with pricing and shipping times. Trommel Brooms and Brushes are made with Tampico bristles for a more rigid and longer lasting brush.

Q: Whats a Trommel? A: Trommels are rotating cylindrical screens that filter unwanted debris to collect ore and other valuable materials. If your screen gets clogged, the trommel's ability to sort threw aggregate is greatly reduced.

https://smith-equipment.com/trommel-broom/