Recovery of elements involving a chemical processing step

Details Recovery of elements involving a chemical processing step Recovery of elements involving a chemical processing step

C - Chemistry, Metallurgy

22

B

C22B 3/12 (2006.01) B09C 1/02 (2006.01) C22B 3/14 (2006.01) C22B 7/00 (2006.01)

Patent

CA 2229599

The present invention relates to improved methods for the extraction and/or recovery of elements, more preferably metals, from starting materials such as mineral ores, recyclable wastes, contaminated soils, toxic wastes such as dusts producing through steelmaking processes (such as electric arc furnace dusts and BOP dusts), and other materials. More particularly, the present invention relates to methods involving a chemical processing step in which the starting materials are contacted with a caustic silica solution.

La présente invention concerne des procédés améliorés pour l'extraction et/ou la récupération d'éléments, de préférence des métaux, à partir de produits de départ, tels que des minerais, des déchets recyclables, des sols contaminés, des déchets toxiques tels que des poussières produites au cours de procédés d'élaboration de l'acier (poussières de fours à arc et de blocs obturateurs de puits) et autres matériaux. Plus particulièrement, la présente invention concerne des procédés comprenant une étape de traitement chimique au cours de laquelle les produits de départ sont mis en contact avec une solution de silice caustique.

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