PROCESS FOR WASTE CONFINEMENT BY VITRIFICATION IN METAL CANS
First Claim
1. Process for confining a waste containing at least one chemical species to be confined, by vitrification in a heated metal can, wherein the waste and a vitrification additive are fed into the metal can, the waste and the vitrification additive are melted to obtain a glass melt, and the glass melt is cooled, characterized in that at least one oxidizing agent is further fed into the metal can and wherein the concentration of oxidizing agent(s) expressed as oxide(s) in the glass melt ranges from 0.1 to 20% by mass of the mass of the glass melt.
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Abstract
Process for confinement of waste containing at least one chemical species to be confined, by in-can vitrification in a hot metal can into which waste and a vitrification additive are added, the waste and the vitrification additive are melted to obtain a glass melt which is then cooled, characterised in that at least one oxidising agent is also added into the metal can and in that the concentration of oxidising agent(s) expressed as oxide(s) in the glass melt is between 0.1 and 20% by mass, preferably 4 and 20% by mass, even more preferably 5 and 15% by mass, and even more preferably 10 and 13% by mass of the glass melt mass.
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Citations
36 Claims
- 1. Process for confining a waste containing at least one chemical species to be confined, by vitrification in a heated metal can, wherein the waste and a vitrification additive are fed into the metal can, the waste and the vitrification additive are melted to obtain a glass melt, and the glass melt is cooled, characterized in that at least one oxidizing agent is further fed into the metal can and wherein the concentration of oxidizing agent(s) expressed as oxide(s) in the glass melt ranges from 0.1 to 20% by mass of the mass of the glass melt.
Specification