Processing of waste incineration ashes

A method for processing incinerator bottom ash (A) in which the ash (A) is classified into a plurality of fractions (I, II, III) of different grain size distribution in a processing plant (11) separate from the actual incinerator,

• the classification of the ash (A) in the processing plant (11) taking place only by a wet classification;
• wherein only wet classification processes gentle on the grain are used in the classification;
• wherein the wet classification is carried out such that the ash (A) is classified completely into at least one contaminated fine fraction (I) and at least one low-contaminant or contaminant-free coarse fraction (II, III);
• and
• the ash coming from the incinerator plant is pretreated such that the ash (A) is introduced into the processing plant (11) with a grain size distribution whose upper limit does not amount to more than approximately 100 mm.