Roller screens are suitable for classiflying coarse, moist, sticky or clayey raw materials. They are used for primary screening/scalping to reduce crusher load or classifying after the crushing process or sorting of metallurgical coke. Feed materials can be medium size Coal, Lignite, Limestone, Grpsum, Coke etc.
Roller screens are screening machines that have several screening rolls rotating in the same direction. Each roll consists of a square shaft fitted with triangular, hexagonal or octagonal shaped roll discs as per requirement. Because of the rotation and special shape of the roll discs, material while passing over the discharge end. The material is subjected to a gentle and harmonic rolling motion. As the material travels, the smaller particle comes to the bottom layer and passes through the openings between two consecutive rolls. The oversized materials are discharged at the other end.
For a moist and sticky material, JH a vibrating screen manufacturer will provide the rolls for cleaning the roll discs.
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