Process for removing heavy metal compounds from the filtrer dust from trash incinerators, flue gas dust precipitators and gas-cleaning units

Abstract From the Canadian patent

The invention is concerned with a process for removing heavy metals and/or heavy metal compounds from the filter dust of refuse incinerators flue gas dust precipitators and gas-cleaning units in which the filter dust is heated in a reaction vessel at least up to the vaporisation temperature of the heavy metals and/or heavy metal compounds which are to be removed, the vaporised heavy metals and/or heavy metal compounds are then quenched in a cooler and converted to a liquid or solid state and, removed. The process of the invention is characterized in that before the vaporization of the heavy metals and/or heavy metal compounds to be removed superfine dust particles with a particle size …