Patent ID: 8689980

Claim:
A method of separating a particle fraction from a particle stream, comprising the steps of: providing an apparatus for the separation of particles, which comprises a vessel filled with an aqueous solution and provided with baffles radiating from a shaft placed concentrically in the vessel and connected to a circular wall that co-rotates with the baffles in order to limit the turbulence in the water, and at least two collecting means for the separated particles, which collecting means have their own discharge means; moving the baffles so as to impart a movement to the aqueous solution; and introducing bottom ash from a waste incineration plant into the apparatus, which bottom ash is moved by the aqueous solution in the apparatus in a substantially horizontal direction defining a relative direction of movement for separation of the bottom ash under the influence of gravitational force into a light fraction, and into a heavy fraction comprising more than 90% nonferrous metal.