Process for the separation of lead from a sulfidic concentrate

Details Process for the separation of lead from a sulfidic concentrate Process for the separation of lead from a sulfidic concentrate

1981-04-15

1983-07-05

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 77, 75 92, C22B 1302

Patent

active

043916325

ABSTRACT:
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slagging agent is fed at such a rate that substantially all of the melt is of the slag type and that all of the melt withdrawn from the lower furnace is directed to a reduction stage in order to reduce the lead silicate and to separate it as raw lead.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.

REFERENCES:
patent: 1888164 (1932-11-01), Freeman
patent: 3563726 (1971-02-01), Elvander et al.
patent: 3847595 (1974-11-01), Liang et al.

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