PROCESS AND DEVICE FOR SEPARATING NON-MAGNETIC MATERIALS AND OBJECTS BY USING FERROHYDRODYNAMIC FLUID

摘要

A process and device are disclosed for separating non-magnetic materials and objects by using ferrohydrodynamic fluids. In order to recover the magnetic liquid that adheres to the separated material, the ferrohydrodynamic fluid that adheres to the separated goods is both separated by means of magnets and dissolved with water. The volume and concentration of ferrohydrodynamic fluid in the separation chambers is continuously monitored by a monitoring arrangement. A preferred field of application of the invention is the separation of crushed materials, the separation of condensers in polychlorinated biphenyl (PCB)- containing condensers and PCB-free condensers. Also disclosed is the composition, the preparation and the use of environmentally compatible aqueous ferrohydrodynamic fluids suitable in particular for separating non-magnetic materials by a sink-float separation process in the magnetic field gradient.