Method for reprocessing dust or dust mixtures

Details Method for reprocessing dust or dust mixtures Method for reprocessing dust or dust mixtures

C - Chemistry, Metallurgy

22

B

C22B 7/02 (2006.01) C21C 5/36 (2006.01) C21C 5/38 (2006.01) C22B 7/04 (2006.01) C22B 13/02 (2006.01) C22B 19/30 (2006.01) C22B 26/10 (2006.01)

Patent

CA 2398349

The invention relates to a method for reprocessing dust or dust mixtures containing alkalis and heavy metals such as e.g., steel works dust, ore dusts or blast furnace dust. According to said method, the dust is introduced onto or into a bath consisting of liquid metals and liquid oxidic slag, especially by blasting. Volatile heavy metal compounds such as e.g., Zn- and/or Pb oxide are separated off from the gas phase and alkalis are introduced into slag.

Procédé pour parachever le traitement de poussières ou de mélanges de poussières renfermant des produits alcalins et des métaux lourds, par exemple, poussières d'aciéries, fines de minerais ou poussières de haut-fourneaux, caractérisé en ce que les poussières sont introduites sur/ ou dans un bain de métaux liquides et de scories d'oxydation liquides, en particulier par soufflage au-dessus du bain ou à l'intérieur du bain, en ce que les composés des métaux lourds volatils, tels que, par exemple, les oxydes de zinc et/ou de plomb sont séparés de la phase gazeuse, et les produits alcalins sont introduits dans les scories.

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