<p>The invention relates to a density separation device (1) comprising a rotatable barrel (2) and a combined feeding (3a) and discharging (3b) means in the form of a vibratory tray (3) running through the barrel from one open end (4) to the other open end (5). Said feeding means (3a) is provided with an opening (6) running at least partly along the length of the barrel through which the fed material can be dosed and spread into the rotatable barrel. Floating material is discharged by a constant overflow of liquid medium, while sunken material is uplifted by lifting means inside the rotating barrel onto the vibratory tray (3) and efficiently evacuated out of the barrel. The invention further relates to a method and to the use of such a device for separating solid material.</p>
