A kind of extraction method of lead-zinc-silver in lead-zinc-silver composite sulfide ore

Abstract

A method for extracting lead-zinc-silver in lead-zinc-silver composite sulfide ore, adding coal powder and quicklime powder to composite mineral raw materials containing lead and / or zinc and / or silver, fully mixing to form a mixture, and pressing the mixture into balls, Then the mixture after briquetting is subjected to vacuum heating and reduction, the heating temperature is controlled separately according to the components extracted from the mineral, and the obtained metal vapor of lead and / or zinc and / or silver is collected by condensation, and the collected condensate A mixture of lead and / or zinc and / or silver. The invention is convenient to operate, safe, hygienic and pollution-free. The method for enriching metallic lead and zinc has the advantages of fast enrichment speed, high production efficiency and small amount of pollution. The method of the present invention for separating metals in minerals has the characteristics of short process, short period, high efficiency and high comprehensive utilization rate of resources, and can greatly improve the efficiency of metal separation and extraction. By adopting the method of the invention, the direct recovery rate of lead and zinc can be more than 98%.

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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