A device for separating broken fragments of particles from the particles, comprising a floor arranged such that it receives the particles and the broken fragments, connected to a vibration device arranged such that it makes the floor undergo a vibratory movement, the floor being pierced with orifices to allow the broken fragments to pass through the orifices without allowing the particles to pass therethrough, and a ceiling arranged substantially parallel to the floor. The device further comprises an actuator arranged so as to move the ceiling between a first position in which it is located at a distance from the floor and a second position in which it is in contact with the floor such that the broken particle fragments stuck in the orifices are expelled therefrom.
