Screening device and method for separating dry granular material

A screening device configured for separating dry granular material into a fine fraction and a coarse fraction, said device comprising a drum screen defined by a substantially open frame that is rotatable about an axis of rotation that extends at least substantially parallel to a central axis of the drum screen, which frame defines a possibly virtual circumferential wall, and a sheet-like screen arranged over the circumferential wall of the frame, which screen has a mesh width that ranges at least substantially between a maximum grain size of grains for the fine fraction and a minimum grain size of grains for the coarse fraction, a driving device by means of which the drum screen is rotatably driven about the axis of rotation in use, a feed opening at a short end of the drum screen, through which dry granular material to be separated is supplied in use, and a discharge opening at the opposite short end of the drum screen, through which the coarse fraction of screened material is discharged in use, and a vibration device which rotates along with the drum screen, which vibration device comprises one or more vibrating elements mounted to the drum screen, which set the drum screen vibrating in use.