Method for processing waste containing metal contaminants...

A - Human Necessities – 62 – D

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A62D 3/37 (2007.01) C22B 7/00 (2006.01)

Patent

CA 2236142

A method for processing waste containing metal contaminants in the form of metals modified by carbon, oxygen, phosphorus or sulphur, wherein the powdered waste is mixed with an ionic reducing agent (not aluminium nitride) in an inert liquid medium, the mixture is melted to give a first liquid phase and a second metal phase, and the two phases are separated and solidified to enable disposal or temporary storage of the first phase and recycling of the second phase. The method is useful for inerting or reclaiming waste containing metal contaminants.

L'invention concerne un procédé de traitement de déchets contenant des contaminant métalliques, sous forme de métaux modifiés par du carbone, de l'oxygène, du phosphore ou du soufre. Ce procédé consiste à: mélanger lesdits déchets à l'état pulvérulent avec un réducteur ionique en milieu liquide inerte, le réducteur étant autre que du nitrure d'aluminium; porter à fusion le mélange jusqu'à obtention d'une première phase liquide et d'une seconde phase métallique, et séparer et solidifier les deux phases en vue de la mise en décharge ou du stockage temporaire de la première et du recyclage de la seconde. Il est utilisé pour l'inertage ou la valorisation des déchets contenant des contaminants métalliques.

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