Rotary screening machine is also called drum screen. It is a form of traditional screening of c screening machine. Usually using combinatorial screening. It is widely used in all kinds of solid materials, which is below the pellet size less than 30 mm. The capacity of screen is usually 1-50 ton/hour. Drum screen can be used in cleaning and in removing impurity, grain size grading, etc.

Rotary screen structure mainly include motor, reducer, drum gear, rack, cover gasket, in and out of the mouth and other parts. The operation principle of the drum screen is that motor and roller device through the coupling together, drive roller device around its axis of rotation. When the materials enter the cylinder device, due to tilt and turn the drum unit, make the material on the surface of the screen to flip and rolling, is to use with the relative motion of sieve grain materials, make the small particles through the sieve pore, complete screening. The use of cylindrical screen with different aperture multi-layer sieve depending on different requirement, according to the particle size and different materials were divided into different levels.