Recovery of chemical values from industrial wastes

Details Recovery of chemical values from industrial wastes Recovery of chemical values from industrial wastes

C - Chemistry, Metallurgy

22

B

C22B 3/14 (2006.01) C01G 9/02 (2006.01) C21B 13/00 (2006.01) C22B 3/46 (2006.01) C22B 5/10 (2006.01) C22B 7/00 (2006.01) C22B 7/02 (2006.01) C22B 19/28 (2006.01) C22B 19/30 (2006.01) C22B 19/34 (2006.01) C25C 1/00 (2006.01)

Patent

CA 2188658

A method for the recovery of chemical values such as metals includimg zinc, zinc oxide, iron-carbon feedstocks, lead amd cadmium, from industrial waste streams which entails treating the waste streams with carbon and am ammonium chloride solution, separating amy undissolved components from the solution, displacing metal ions including lead amd cadmium from the solution using zinc metal, further treating the solution to remove zinc compounds therefrom, further treating the zinc compounds amd the undissolved components with a dissolving solution, and further treating the displaced metal ions to recover lead, cadmium and zinc therein using various methods including electrolysis.

Un procédé de récupération de produits chimiques de valeur, tels que des métaux comme le zinc, l'oxyde de zinc, des charges de départ de fer-carbone, du plomb et du cadmium, contenus dans des flux industriels, consiste à traiter ces flux industriels avec du carbone et une solution de chlorure d'ammonium, à séparer tous les composants dissous de la solution, à remplacer les ions métalliques y compris le plomb et le cadmium de la solution par du zinc métal, puis à traiter la solution pour en éliminer les composés de zinc, à traiter ensuite les composés de zinc et les composants non dissous avec une solution dissolvante, et enfin à traiter les ions métalliques supplantés pour récupérer le plomb, le cadmium et le zinc à l'aide de divers procédés, y compris l'électrolyse.

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