Process and apparatus for the separation of lead from a...

Details Process and apparatus for the separation of lead from a... Process and apparatus for the separation of lead from a...

C - Chemistry, Metallurgy

22

B

39/3, 53/334

C22B 13/00 (2006.01) C22B 13/02 (2006.01)

Patent

CA 1162056

ABSTRACT OF THE DISCLOSURE Lead in separated from a sulfidic concentrate by feeding a finely-divided concentrate, a silicate-high slagging agent, and air or oxygen-enriched air into the upper section of a suspension reaction shaft of a flash-smelting furnace in order to form a suspension and to oxidize the lead to lead oxide, by removing the gases via a riser pipe of the furnace and by discharging melt from a lower furnace of the flash-smelting furnace for further treatment. The slagging agent is fed at such a rate that substantially all of the melt is of the slag type and that all of the melt withdrawn from the lower furnace is directed to a reduction stage in order to reduce the lead silicate and to separate it as raw lead. The transversal cross section of the lower furnace is preferably substantially circular.

375581

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