Abstract: 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 recycle 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 aluminium 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 separation 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.degree. to 1400.degree. C. through a bed of a carboniferous material.