C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/331
C22B 4/04 (2006.01) C22B 11/02 (2006.01) C22B 13/02 (2006.01)
Patent
CA 1086073
ELECTRIC SMELTING OF LEAD SULPHATE RESIDUES ABSTRACT OF THE DISCLOSURE A process for treatment, without prior sintering, of lead residues in which 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 SiO2, directly to an electric furnace operating at a temper- ature of 1000 to 1500°C in the slag layer, to produce in the furnace a lead bullion. A high grade lead bullion is obtained containing the major proportions of the lead, along with any precious metals present in the residues.
270679
Matthew Ian G.
Pickering Ralph W.
Suzuki Takashi
Uchida Hisashi
Electrolytic Zinc Company Of Australasia Limited
Kirby Eades Gale Baker
Mitsubishi Metal Corporation
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