Electric smelting of lead sulphate residues

Details Electric smelting of lead sulphate residues Electric smelting of lead sulphate residues

1977-02-24

1979-01-23

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 77, C22B 404, C22B 1306

Patent

active

041359127

ABSTRACT:
A process for treatment of lead residues, without prior sintering, in which residues more than 70% of the lead is present as lead sulphates, comprising addition of the said residues, together with a reductant containing carbon and together with fluxes that will react to provide a slag containing FeO, CaO and SiO.sub.2, directly to an electric furnace operating at a temperature of 1000 to 1500.degree. C in the slag layer to produce in the furnace a lead bullion. The expression "lead sulphates" will be understood to include lead sulphate and other compounds containing lead and the sulphate ion, for example, the basic lead sulphates.

REFERENCES:
patent: 3395010 (1968-07-01), Shoeld
patent: 3689253 (1972-09-01), Dorenfeld
patent: 3940265 (1976-02-01), Wilson
patent: 4030916 (1977-06-01), Linger

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