Goregaon East, Mumbai, Maharashtra

Rotary Screens

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Rotary / Trommel Screen

Rotary / Trommel Screen
  • Rotary / Trommel Screen
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Rotary / Trommel Screen


A Rotary screen, also known as Trommel screen, is an essential unit which is used mainly in the mineral and solid-waste processing industries. It consists of a perforated cylindrical drum which is normally elevated at an angle at the feed end. Physical size separation is achieved as the feed material spirals down the rotating drum, where the undersized material smaller than the screen apertures passes through the screen, while the oversized material exits at the other end of the drum.


1. Configured for economical & efficient classification, Screening and grading.

2. Heavy duty trommel drum with lifters at the front to facilitate material break up.

3. Screen replaceable for different mesh sizes.

4. Multiple screen size.

5. Easily changed screen plates.

6. Largest processing capacity in the industry.

7. Unique screen design, result in higher capacities, longer screen life and no material clogging.

8. Heavy duty feed hopper and extension.

9. Gear drive mechanism.

10. Variable speed drive mechanism.

Municipal and industrial waste:

Trommel screens are used by the municipal waste industry in the screening process to classify sizes of solid waste. Besides that, it can also be used to improve the recovery of fuel-derived solid waste. This is done by removing inorganic materials such as moisture and ash from the air-classified light fraction segregated from shredded solid waste, thereby increasing the quality of the product fuel. In addition, trommel screens are used for the treatment of wastewater. For this particular application, solids from the entering flow will settle onto the screen mesh and the drum will rotate once the liquid reaches a certain level. The clean area of the screen is submerged into the liquid while the trapped solids fall onto a conveyor which will be further processed before removal.

Mineral processing:

Trommel screens are also used for the grading of raw materials to recover valuable minerals. The screen will segregate minuscule materials which are not in the suitable range of size to be used in the crushing stage. It also helps to get rid of dust particles which will otherwise impair the performance of the subsequent machineries in the downstream processes.

Other applications:

Other applications of trommel screens can be seen in the screening process of composts as an enhancement technique. It selects composts of variable size fractions to get rid of contaminants and incomplete composted residues, forming end products with a variety of uses. Besides this, the food industries use trommel screens to sort dry food of different sizes and shapes. The classification process will help to achieve the desired mass or heat transfer rate and avoid under or over-processing. It also screens tiny food such as peas and nuts that are strong enough to resist the rotational force of the drum.

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Ajay Chandwani (Manager)
No. A-11, Laghu Udyog Kendra, I. B. Patel Goregaon East
Mumbai- 400063, Maharashtra, India

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