C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/314, 53/331
C22B 13/02 (2006.01)
Patent
CA 1212842
ABSTRACT OF THE DISCLOSURE A method of processing lead sulphate or lead-zinc sulphide ores, or sulphide concentrates, or mixtures thereof, residing in that said lead sulphide or lead-zinc sulphide ores, or sulphide concentrates, or mixtures thereof are subjected to roasting-and- reduction in an atmosphere of industrial oxygen in the presence of fluxes with addition of recycled products to a desulphurization of 85 to 100%, with the obtaining of a molten slag, in which the weight ratio of the sum of silicon dioxide and aluminum oxide to ferrous oxide is 0.67-1.22:1 and that of the sum of calcium oxide and magnesium oxide to ferrous oxide is 0.22-0.75:1, with subsequent separa- tion of lead and zinc by way of a selective reduction of lead oxides to metal in the course of filtration of the resulting dispersed slag at a temperature of 1100 to 1400°C through a bed of a carboniferous material.
433209
Abdeev Jury M.
Grinin Jury A.
Polyakov Ivan P.
Sannikov Jury I.
Sychev Anatoly P.
Ogilvy Renault
Vsesojuzny Nauchno-Issledovatelsky Gorno-Metallurgichesky Instit
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