Rotary Trommel Screen is mainly used for undertaking separation by the material size. This happens as the material is fed down the rotating drum in spirals. The separation takes place when the smaller material passes through the screen, while the bigger material is thrown out at the ending of the machine.

Basically, it is a mechanical screening machine, utilised for thoroughly separating the metallic impurities from the aluminium. Consisting of punctured cylindrical drum that is lifted by some angles at the end of process.