Patent ID: 6409798
Filing Date: 2002-06-25
Classification: C22B,D21B,Y02P,Y02W

Abstract:
A process for recovering metal material from waste material that includes organic material and metal material in the form of thin foil metal material, the process including the following steps:introducing the waste material into a fluidized bed gasifier; introducing air through a bottom grid into the gasifier for fluidizing a bed of solid particles in the gasifier, for gasification of the organic material therein and production of a combustible gas; discharging separately from the gasifier bottom ash and combustible gas produced in the gasification step; maintaining the temperature in the gasifier below the melting temperature of the metal material; tearing the thin foil metal material into small metal flakes in the fluidized bed; setting the velocity of the air in the fluidized bed such that the metal flakes are entrained with the produced combustible gas, but the not-gasified waste material and the bed particles stay in the bed; discharging the metal flakes from the gasifier together with the combustible gas; and introducing the combustible gas discharged from the gasifier into a separator, for separating metal material from the combustible gas.