Abstract

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.

IPC Classes  ?

• B03B 5/42 - Devices therefor, other than using centrifugal force of drum or lifting wheel type
• B03B 11/00 - Feed or discharge devices integral with washing or wet-separating equipment

Abstract

The invention relates to a density separation device (1) for separating solid material particles in a float and a sink fraction by means of a liquid medium, the specific gravity of said liquid medium being between the specific gravity of the particles of the float fraction and the specific gravity of the particles of the sink fraction, wherein the device is provided with a first discharge zone (3) for evacuating the float fraction as well as the medium by means of rotation, a second discharge zone (4) for evacuating the sink fraction by means of rotation and using first discharging elements (7a), and a separation zone (2) comprising a first slanting part (5) and a second slanting part (6) adjacent to the first slanting part (5), wherein the second slanting (6) part is provided with one or more second discharging elements (7a,7b), and wherein this first and second slanting part (5, 6) are sloping towards each other, such that, by means of rotation, the sink fraction that sank on the first slanting part (5) moves towards the second slanting part (6), whereupon the sink fraction is taken along with the discharging elements (7a, 7b) of the second slanting part (6) and a second discharge zone (2) for discharging towards the second discharge opening (40). The invention relates furthermore to a method for the selective separation of absorbent and/or non - ab sorbent material particles by means of a magnetic or magnetizable suspension, wherein the method comprises the subsequent steps of treating the material particles with water until the absorbent material particles are saturated with water; bringing the mate rial particles in the magnetic or magnetizable suspension, and separating the material particles by means of magnets.

IPC Classes  ?

• B03B 1/04 - Conditioning for facilitating separation by altering physical properties of the matter to be treated by additives
• B03B 5/42 - Devices therefor, other than using centrifugal force of drum or lifting wheel type
• B03B 11/00 - Feed or discharge devices integral with washing or wet-separating equipment
• B03C 1/01 - Pretreatment specially adapted for magnetic separation by addition of magnetic adjuvants