Introduction of Trommel Screen

Trommel Screen

A trommel screen is a screening device that performs particle size classification based on a rotating cylinder. It is widely used in industries such as mining, construction materials, and metallurgy. It is primarily employed for screening medium to fine-grained bulk materials, commonly for the size classification of minerals like coal, sand and gravel, iron ore, and limestone. It can also be used for separating municipal solid waste and chemical raw materials.

Its working principle is as follows: Material enters the inclined or horizontally installed rotating drum from the feed end. Under the combined action of the cylinder rotation and gravity, the material continuously tumbles and disperses. Particles smaller than the screen apertures pass through to become the undersize material, while particles larger than the apertures move along the screen surface axially and are eventually discharged from the outlet end. This process enables continuous and efficient particle size separation.

The characteristic advantages of the trommel screen include:

1. Stable operation, low noise, and relatively high screening efficiency.

2. Simple structure, easy maintenance, and good adaptability for screening damp materials.

3. Modular design allows for adaptation to different classification requirements by changing screen meshes.

4. The fully enclosed structure helps reduce dust pollution.

Its main structure consists of the drum assembly, drive unit (motor, reducer), frame, feed and discharge hoppers, and sealing cover. The drum is typically composed of segmented screen meshes or made from a perforated plate.