Direct smelting of zinc bearing compounds to produce...

C - Chemistry – Metallurgy – 22 – B

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C22B 5/16 (2006.01) C22B 13/00 (2006.01) C22B 19/04 (2006.01)

Patent

CA 2687755

A process for producing lead and zinc from concentrates of zinc and lead sulfides or oxides includes the steps of: (a) mixing lead ore and/or zinc ore concentrates, iron bearing and carbon containing materials, metallic iron fines and iron oxide fines, carbonaceous reductant, fluxing agent, and a binder to form a mixture; (b) forming agglomerates from the mixture (c) introducing the agglomerates to a melting furnace; (d) vaporizing lead and zinc in the melting furnace, and removing these metals from the melting furnace in vaporized form; (e) cooling and condensing the metal vapors to liquid metal; (f) separating the zinc and lead; and (g) recovering each metal separately.

L'invention concerne un procédé de production de plomb et de zinc à partir de concentrés de sulfures ou d'oxydes de zinc et de plomb. Le procédé comprend les étapes consistant: à mélanger des concentrés de plomb et/ou de zinc, des matériaux porteurs de fer et contenant du carbone, des fines de fer métallique et des fines d'oxyde de fer, un réducteur carboné, un fondant et un liant afin de former un mélange; (b) à former des agglomérats à partir du mélange; (c) à introduire les agglomérats dans un four de fusion; (d) à vaporiser le plomb et le zinc dans le four de fusion, et à évacuer lesdits métaux du four de fusion sous forme vaporisée; (e) à refroidir et à condenser les vapeurs métalliques en métal liquide; (f) à séparer le zinc et le plomb; et (g) à récupérer chaque métal séparément.

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