Method for extracting lead, zinc and silver in lead-zinc-silver composite sulfide minerals

Abstract

The invention provides a method for extracting lead, zinc and silver in lead-zinc-silver composite sulfide minerals. The method comprises the steps of adding pulverized coal and quicklime powder intoa composite raw mineral material containing lead and / or zinc and / or sliver to be mixed evenly to form a mixture, conducting pelletization on the mixture; conducting vacuums heating reduction on the pelletized mixture, controlling the heating temperatures according to the components extracted from the minerals correspondingly, collecting the obtained lead and / or zinc and / or sliver metal steam in acondensing mode to obtain a collected condensation product which is the mixture of the lead and / or zinc and / or sliver. The method has the advantages of convenient operation, safety, sanitation and non-pollution. The method is used for enriching metallic-state lead and zinc has the advantages of high enrichment speed, high production efficiency and small pollution. The method is used for separatingmetals in the minerals and has the characteristics of short technological process, short cycle, high efficiency and high resource comprehensive utilization rate. The separation and extraction efficiency of the metals can be greatly improved. By means of the method, the direct yield rates of lead and zinc can reach up to 98% or more.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to the preliminary separation of lead-zinc-silver in lead-zinc-silver composite ore, in particular to a kind of direct conversion of lead, zinc and silver into metallic lead in composite lead-zinc-silver ore existing in sulfide or oxide Zinc and silver extraction method. Background technique [0002] Zinc in zinc ore mainly exists in the form of sulfide, and there is also a small amount of zinc oxide. There are currently three methods for industrial application of zinc extraction from zinc ore. One is called hydrometallurgy process, which is to oxidize zinc sulfide to zinc oxide or sulfuric acid, and then leaching with sulfuric acid solution to transfer zinc into the solution. The zinc-containing solution is purified and removed. After impurity, the zinc ions in the solution are transformed into metal zinc by electrowinning on the purified solution. The second is called the pyrome...

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Problems solved by technology

[0012] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a method for extracting lead-zinc-silver in lead-zinc-silver composite sulfide ore, which can solve the problems in the prior art that there are many processes, the process is lengthy, and the amount of pollutants is large. , and the lead, zinc and silver in the lead-zinc-silver composite ore can be obtained in the form of lead-zinc-silver metal mixture

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