METHOD FOR CONFINING WASTE BY VITRIFICATION IN METAL POTS

摘要

The invention relates to a method for confining waste, containing at least one chemical species to be confined, by vitrification in a heated metal pot wherein the waste and a vitrification additive are fed into the metal pot, the waste and vitrification additive are melted in order to obtain a glass melt, and the glass melt is cooled down, characterised in that the method further comprises adding at least one oxidant agent into the metal pot and in that the oxidant agent concentration expressed in oxide(s) in the glass melt ranges from 0.1 to 20 wt %, preferably from 4 to 20 wt %, more preferably from 5 to 15 wt % and even more preferably from 10 to 13 wt % relative to the weight of the glass melt.