The present invention relates to a process for the treatment of solid residues coming from the purification of fumes coming from a waste incineration furnace, and an installation for implementing this method. & br / this method consists in using, as additive, the solid residue is taken directly from the incineration furnace (1) of the waste. The additive is mixed with the residues. The mixture is vitrified in a melting furnace (15). The solid products, vitrified are placed on a discharge (17) and the gaseous products resulting from the vitrification are possibly recycled to the incineration furnace (1). br / this process makes it possible, for example, the vitrification, the melting, the stabilization of the solid residue resulting from the incineration of household or industrial waste.
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