STABILISATION TREATMENT, IN PARTICULAR FOR WASTE INCINERATION RESIDUES

摘要

The invention relates to a treatment method in cold liquid phase consisting essentially in first performing lixiviation-sulphuration in order to render the heavy metals therein inert by means of cementation (3) with a sulphuring agent (F), thereby enabling stable solid sulphurous compounds to be formed from their oxidised form and enabling the movement into the liquid fraction of chlorides and sulphates. Said liquid fraction is subsequently stabilised by means of precipitation with cementing materials (J) (preferably recovered, such as steel blast furnace slag). The solid fractions obtained after the treatment can be used as clinker or ore. The liquid phase (M) can be re-used in a new treatment cycle after desalination.