A process for processing waste incineration residues

C - Chemistry – Metallurgy – 22 – B

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C22B 7/04 (2006.01) C21B 3/04 (2006.01) C21C 5/36 (2006.01)

Patent

CA 2216156

In a process for processing waste incineration residues, such as, e.g., waste incineration slags, in which the slags are subjected to a reduction process while separating metals, the solid waste incineration residues are introduced into a steelworks slag bath in amounts ranging from 15 to 45 % by weight, based on the overall quantity, that the heavy metals or heavy metal compounds, such as, e.g., Zn, Pb, Cd or Hg chlorides, evaporating during melting of the waste incineration residues or slag are drawn off and the liquid bath is reduced by aid of carbon carriers and under the formation of an iron bath, whereupon the slag phase depleted from metals is granulated and used as a mixed cement component.

Procédé de traitement de résidues d'incinération d'ordures, tels que des scories d'incinération par exemple, dans lequel les scories sont soumises à une réduction avec séparation des métaux, ledit procédé consistant à introduire les résidus d'incinération solides, à raison de 15 à 45 % en poids par rapport à la quantité totale, dans un bain de laitier d'aciérie, et à soutirer les métaux lourds ou les composés de métaux lourds, tels que, par exemple, les chlorures de Zn, Pb, Cd ou Hg se volatilisant lors de la fusion des résidus ou scories d'incinération. Le bain liquide est réduit par des transporteurs de carbone, avec formation d'un bain d'acier, la phase laitier appauvrie en métaux étant ensuite granulée et utilisée comme composant de ciment mixte.

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