Process for separating compressed material containing paper fibers

Abstract

Process and apparatus for separating compressed material containing paper fibers where the apparatus includes at least three hammer rollers arranged essentially in a same plane and each hammer roller includes rotatable hammers. The process includes rotating the rotatable hammers, transporting the material over the at least three hammer rollers in a transport direction essentially parallel to the plane and transverse to the axes of the rollers, breaking up the material into fine material and non-fine material, and separating the fine material from the non-fine material by allowing the fine material to pass through gaps formed between the hammer rollers. The apparatus includes a machine frame and a plurality of rotors arranged next to one another in the machine frame. Axes of the driven rotors are arranged to lie in at least one plane, and the rotors are positioned to form free gaps between the driven rotors. A delivery unit, positioned above the plurality of rotors, is adapted to deliver the compressed material to the plurality of rotors and a removal unit, positioned below the plurality of rotors, is adapted to remove the processed material. The plurality of rotors include hammer rollers having shafts coupled to rotatable hammers, and a driver is provided for driving at least some adjacent hammer rollers in a same rotational direction.