Abstract: A Method for purifying gas loaded with dust particles of various sizes, which method includes the following steps: (a) the gas loaded with dust particles is subjected to wet gas scrubbing at or above the dew point, during which operation any acid gaseous components present in the gas are absorbed and the major proportion of coarse dust particles having a size of ≧50 &mgr;m is removed by a scrubbing liquid, after which (b) the remaining dust particles present in the gas are collected at or above the dew point in an installation for removing dust from gas, purified gas being obtained.

Abstract: The invention relates to a process for pyrometallurgical processing, in a furnace chamber, of metal-containing waste which may also contain a quantity of organic material. The process involves a reducing gas being blown with high velocity onto the surface of the smelt in which the metal oxides are present in the molten state, the reducing gas being made by incomplete combustion of a fuel and/or the organic material and an oxygen-containing gas. Additionally, steam and/or an oxygen-rich gas such as almost pure oxygen are injected, roughly parallel to the surface of the smelt, into the oven chamber above said surface. The total amount of oxygen used in the furnace chamber is lower than the amount required stoichiometrically for complete combustion of the organic material together with the fuel.