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Method for lowering zinc grade in zinc-containing lead concentrate and recycling zinc

A zinc-lead and concentrate technology, which is applied in the field of reducing zinc grade and recovering zinc, reducing zinc grade in zinc-containing lead concentrate and recovering zinc, and recovering zinc in zinc-lead concentrate, which can solve the problem of difficult zinc technology and environmental protection. High pressure, large zinc loss and other problems, to achieve the effect of low cost, large economic benefits and simple equipment

Active Publication Date: 2020-06-16
有研资源环境技术研究院(北京)有限公司
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Problems solved by technology

[0002] For the lead concentrate with higher zinc content produced by flotation, the current treatment process is smelting volatilization-oxidation leaching-iron removal-extraction. The zinc volatilization process is technically difficult, with high zinc loss, high energy consumption and high environmental protection pressure. Therefore, it is necessary to provide a new economical method that can reduce the zinc grade in zinc-containing lead concentrate and recover zinc

Method used

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  • Method for lowering zinc grade in zinc-containing lead concentrate and recycling zinc

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Embodiment 1

[0039] The process described in the present invention is applied to a certain zinc-lead concentrate in Yunnan, my country. The ore sample is mainly galena, and there are also a small amount of chamarite, sphalerite, pyrite, chalcopyrite, and gangue minerals in addition. Gangue minerals are mainly a small amount of quartz, feldspar and so on. The conjoint body of galena and sphalerite constituted 15% of the lead concentrate. The ore contains 58.3% lead, 8.2% iron and 8.9% zinc.

[0040] process such as figure 1 Shown:

[0041] 1. Prepare mixed ore leaching bacteria

[0042] Mix Leptospirillum ferrooxidans Retech-SPL-1 and Sulfobacillusthermosulfidooxidans (S.t) DSM 9293 in a weight ratio of 7:3 to form a mixed leaching bacteria;

[0043] 2. Amplified culture:

[0044]Add sulfuric acid to adjust the pH value of the solution to 1.8 by adding sulfuric acid to ordinary tap water, add 3% (wt) ferrous sulfate, and scale up the culture for 6 times. The amount of each bacterial i...

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Abstract

The invention provides a method for lowering the zinc grade in zinc-containing lead concentrate and recycling zinc. According to the method, the difference of microorganism dissolution between sphalerite and galena in a sulfuric acid medium is utilized, zinc in the sphalerite is preferentially extracted, the lead content in the lead concentrate can be increased by 2-5%, then the subsequent treatment process of the lead concentrate is simplified, and smoke, sulfur dioxide and other poisonous gas with large pollution are not discharged in the process. The technological process is short, the equipment is simple, the investment is saved, the cost is low, no pollution is caused, zinc in the lead concentrate is recycled while the lead grade in the zinc concentrate is improved, and comprehensiverecycling of lead and zinc is achieved.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy of non-ferrous metals, and relates to a method for recovering zinc in zinc-containing lead concentrates, in particular to a method for reducing the grade of zinc in zinc-containing lead concentrates and recovering zinc, especially zinc containing 5% to 5%. A method for reducing zinc grade and recovering zinc in 12% lead concentrate. Background technique [0002] For the lead concentrate with high zinc content produced by flotation, the current treatment process is smelting volatilization-oxidation leaching-iron removal-extraction. The zinc volatilization process is technically difficult, with large loss of zinc, high energy consumption, and high pressure on environmental protection. Therefore, it is necessary to provide a new economical method capable of reducing the grade of zinc in zinc-containing lead concentrate and recovering zinc. Contents of the invention [0003] In order to solve the abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18C22B3/44C22B3/38C22B19/20C25C1/16
CPCC22B3/18C22B3/44C22B19/22C25C1/16C22B3/3846Y02P10/20
Inventor 刘学高文成武彪尚鹤温建康
Owner 有研资源环境技术研究院(北京)有限公司