Abstract: A separator-disintegrator includes a casing accommodating a rotor, a rotor drive, a pipe to charge material to be separated and pipes to discharge fine and coarse fractions of material. The rotor is embraced by an annular chamber installed in the casing and facing the rotor with its open portion. An inner space of the chamber makes up a material separation zone. Side walls of the chamber have openings to communicate the chamber with the pipe to discharge fine fraction of material. The pipe to discharge coarse fraction of material, which communicates with the chamber, has a damper mounted for longitudinal movement.