| 摘要 |
<p>The invention relates to non-ferrous metallurgy, in particular to methods for reprocessing lead-containing materials. The aim of the invention is to increase a lead extraction into a crude metal, to improve a specific performance and to simultaneously reduce the unit costs of energy vectors. The inventive method consists in preparing and drying a mix material, in carrying out roast melting in a suspended state in oxygen atmosphere in such a way that an oxide melt and mixtures of dusts with roast smelting gases are obtained, in reducing the melt during the filtration thereof through a layer of hot parts of a carbon reducing medium in such a way that a pure metal lead, a zinc-containing oxide melt and gases are obtained. The mix material is ground and classified and the separated fraction of dry mix material, 90% of the mass of which consists of particles having size of 0.01-0.10 mm, is supplied at the roast smelting stage. The moisture content of the mix material, during the preparation thereof, is equal to 8-16 % and a coal, in the dry mass of which a total carbon content ranges from about 49 to about 80% and a volatile content from about 11 to about 27%, is used in the form of a ground carbon reducing medium.</p> |
