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Bacterial leaching copper method of complex chalcopyrite flotation tailings

A technology for flotation tailings and chalcopyrite type, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of many copper-containing minerals, which have not been effectively developed and utilized, and achieve environmentally friendly operation , Alleviate the shortage of copper resources, the effect of good economic benefits

Active Publication Date: 2010-02-03
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]In recent years, most of the bacterial copper leaching technology has been applied to secondary sulfide ores (chalcocite, etc.), while for chalcopyrite-type primary copper sulfide ores There are few applications of bacterial leaching, and there are many chalcopyrite-type copper-containing minerals, which have not been effectively developed and utilized.

Method used

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  • Bacterial leaching copper method of complex chalcopyrite flotation tailings
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  • Bacterial leaching copper method of complex chalcopyrite flotation tailings

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The chemical analysis of flotation tailings sample 1 is shown in Table 2.

[0023] Table 2 Chemical composition analysis of tailing sample 1

[0024]

[0025] step:

[0026] (1) Granulation: Mix the flotation tailings, cement of model 32.5 and water in a volume ratio of 6:1:2 to make granules of 10mm-20mm, and air dry them naturally.

[0027] (2) Bacterial culture: inoculate the mixed bacterial liquid containing Thiobacillus ferrooxidans and Microspirillum ferrooxidans in a 20L organic glass bacterial oxidation tank with a stirring device, inoculate it into 9K medium, and carry out expanded culture. The volume ratio of the inoculum is: strain: medium = 1:10, the culture temperature is 25°C, the pH of the culture solution is 1.0-2.0, and the culture time is 48 hours.

[0028] (3) Flotation tailings acidity adjustment: The prepared flotation tailings particles are packed in a φ90×900mm plexiglass column, and the MP-20RZ ​​magnetic drive circulating pump is used to spray the concen...

Embodiment 2

[0034] The chemical analysis of flotation tailings sample 2 is shown in Table 3.

[0035] Table 3 Tailings sample 2 Chemical composition analysis

[0036]

[0037] step:

[0038] (1) Granulation: Mix the tailings, cement of model 32.5 and water at a volume ratio of 5:1:2 to make granules of 10mm-20mm, and air dry them naturally.

[0039] (2) Bacterial culture: inoculate the mixed bacterial liquid containing Thiobacillus ferrooxidans and Microspirillum ferrooxidans in a 20L organic glass bacterial oxidation tank with a stirring device, inoculate it into 9K medium, and carry out expanded culture. The volume ratio of the inoculum is: strain: medium = 1:15, the culture temperature is 47°C, the pH value of the culture solution is 1.0-2.0, and the culture time is 24 hours.

[0040] (3) Flotation tailings acidity adjustment: the prepared flotation tailings particles are packed in a φ90×900mm plexiglass column, and the MP-20RZ ​​magnetic drive is used to drive the circulating pump, and the con...

Embodiment 3

[0046] The chemical analysis of flotation tailings sample 3 is shown in Table 4.

[0047] Table 4 Tailings sample 3 chemical composition analysis

[0048]

[0049] step:

[0050] (1) Granulation: The flotation tailings, cement of model 42.5 and water are mixed in a volume ratio of 7:1:3 to form 10mm-20mm particles, and they are air-dried naturally.

[0051] (2) Bacterial culture: inoculate the mixed bacterial liquid containing Thiobacillus ferrooxidans and Microspirillum ferrooxidans in a 20L organic glass bacterial oxidation tank with a stirring device, inoculate it into 9K medium, and carry out expanded culture. The volume ratio of the inoculum is: strain: culture medium=1:20, the culture temperature is 60°C, the pH value of the culture solution is 1.0-2.0, and the culture time is 36 hours.

[0052] (3) Flotation tailings acidity adjustment: the prepared flotation tailings particles are packed in a φ90×900mm plexiglass column, and the MP-20RZ ​​magnetic drive is used to drive the cir...

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Abstract

The invention discloses a bacterial leaching copper method of complex chalcopyrite flotation tailings, comprising seven steps, namely granulation, bacterial culture, acidity adjustment, bacterial leaching, extraction, back-extraction and electro deposition. The method uses the mixed bacterial of thiobacillus ferrous oxide and micro spirillum ferrous oxide to carry out leaching on mill tailings taken as raw materials that can not be effectively and economically treated by other processes, and metal copper in the raw materials is recovered. Therefore, not only the situation of the shortage of copper resource is alleviated and favorable economic benefits are created, more important, the problem that copper tailings sand occupies a great amount of fertile land and pollutes environment is solved, and win-win benefits of economy and social environment are realized.

Description

Technical field [0001] The invention belongs to the technical field of biometallurgy, and particularly relates to a method for leaching copper with bacteria for complex chalcopyrite flotation tailings. Background technique [0002] Copper is an important non-ferrous metal. With the development of the national economy, the demand for copper is increasing year by year. my country needs to import a large amount of copper raw materials and products every year, and the contradiction between copper supply and demand is very prominent. The mining of copper mines has a history of hundreds of years. Each copper mine has piles of flotation tailings, which occupy a large amount of fertile land on the one hand, and cause serious pollution to the environment on the other hand. Studies have shown that flotation tailings contain multiple resources such as copper, lead, zinc, nickel, etc. If traditional processes are used for recovery, the cost is unreasonable. It is feasible to leaching flota...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B3/26C25C1/12
CPCY02P10/20
Inventor 杨洪英佟琳琳巩恩普
Owner NORTHEASTERN UNIV
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