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

An extraction method, a technology of sulfide ore, which is applied in the extraction of zinc and silver directly converted into metallic lead-zinc-silver, and in the field of lead in composite lead-zinc-silver ore, which can solve the problems of lengthy process, large amount of pollutants, and many processes. , to achieve the effect of improving separation and extraction efficiency, fast enrichment speed and short process

Active Publication Date: 2019-05-10
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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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

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

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[0038] The specific content of the present invention will be described in further detail below in conjunction with the examples.

[0039] The invention discloses a method for extracting lead-zinc-silver in a lead-zinc-silver composite ore. Coal powder and quicklime powder are added to the composite ore, fully mixed to form a mixture, the mixture is briquetted, and then the briquetted mixture is subjected to vacuum heating and reduction. The heating temperature is controlled separately according to the components extracted from the minerals. The extraction control temperature of lead in lead sulfide minerals is 800-1000 °C, the control temperature of zinc extraction in zinc sulfide minerals is 900-1000 °C, and the control temperature of silver extraction in minerals is 1100 °C. Between -1200°C, keep warm for 0.5-4 hours, and collect the metal vapors of lead, zinc, and silver obtained by heating and reducing by condensation, and the collected condensate is a mixture of lead, zinc...

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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...

Claims

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Application Information

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IPC IPC(8): C22B1/24C22B5/10C22B11/02C22B13/02C22B19/04
Inventor 马红周王耀宁
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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