Bacterial leaching copper method of complex chalcopyrite flotation tailings

A technology of flotation tailings and chalcopyrite type, which is applied to the improvement of process efficiency, photography technology, instruments, etc., to achieve good economic benefits, realize economic benefits and social environmental benefits, and solve the effect of polluting the environment

Active Publication Date: 2011-03-30
NORTHEASTERN UNIV LIAONING
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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
  • Bacterial leaching copper method of complex chalcopyrite flotation tailings
  • Bacterial leaching copper method of complex chalcopyrite flotation tailings

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The chemical analysis of flotation tailings sample 1 is shown in Table 2.

[0025] Table 2 Analysis of chemical composition of tailings sample 1

[0026]

[0027] steps:

[0028] (1) Granulation: Mix flotation tailings, 32.5 cement and water at a volume ratio of 6:1:2 to make granules of 10mm to 20mm, and air-dry them naturally.

[0029] (2) Bacterial cultivation: the mixed bacterial liquid containing Thiobacillus ferrooxidans and Microspiral ferrooxidans is inoculated into 9K culture medium in a 20L plexiglass bacterial oxidation tank with a stirring device, and then expanded and cultivated. The volume ratio of the inoculum is: strain: culture medium = 1:10, the culture temperature is 25°C, the pH value of the culture solution is 1.0-2.0, and the culture time is 48 hours.

[0030] (3) Adjusting the acidity of flotation tailings: put the prepared flotation tailings particles in a plexiglass column of φ90×900mm, and use MP-20RZ ​​magnetic drive circulating pump to s...

Embodiment 2

[0036] The chemical analysis of flotation tailings sample 2 is shown in Table 3.

[0037] Table 3 Analysis of chemical composition of tailings sample 2

[0038]

[0039] steps:

[0040] (1) Granulation: mix the tailings, 32.5 cement and water at a volume ratio of 5:1:2 to make 10mm-20mm granules, and let them dry naturally.

[0041] (2) Bacterial cultivation: the mixed bacterial liquid containing Thiobacillus ferrooxidans and Microspiral ferrooxidans is inoculated into 9K culture medium in a 20L plexiglass bacterial oxidation tank with a stirring device, and then expanded and cultivated. 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.

[0042] (3) Adjust the acidity of flotation tailings: put the prepared flotation tailings particles in a plexiglass column of φ90×900mm, drive the circulation pump with MP-20RZ ​​magnetic force, and spray the column w...

Embodiment 3

[0048] The chemical analysis of flotation tailings sample 3 is shown in Table 4.

[0049] Table 4 Analysis of chemical composition of tailings sample 3

[0050]

[0051] steps:

[0052] (1) Granulation: Mix flotation tailings, cement of type 42.5, and water at a volume ratio of 7:1:3 to make granules of 10mm to 20mm, and air-dry them naturally.

[0053] (2) Bacterial cultivation: the mixed bacterial liquid containing Thiobacillus ferrooxidans and Microspiral ferrooxidans is inoculated into 9K culture medium in a 20L plexiglass bacterial oxidation tank with a stirring device, and then expanded and cultivated. 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.

[0054] (3) Adjust the acidity of flotation tailings: put the prepared flotation tailings particles in a plexiglass column of φ90×900mm, drive the circulation pump with MP-20RZ ​​magnet...

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PUM

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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 is a biological metallurgical technology field, and it specially involves a bacterial copper -dipping method of complex bronze -mine -type floating tailings. Background technique [0002] Copper is an important non -ferrous metal. With the development of the national economy, the demand for copper has increased year by year.my country needs to import a large amount of copper raw materials and products every year, and the contradiction between the supply and demand of copper is very prominent.The mining of copper mines has a history of hundreds of years. Each bronze mine has a pile of floating tailings. On the one hand, it occupies a large number of good fields, and on the other hand, it has caused serious pollution to the environment.Studies have shown that floating tailings contain a variety of resources such as copper, lead, zinc, nickel, and other resources. If traditional process recovery is used, the cost is unreasonable.The use of new s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/18C22B3/26C25C1/12
CPCY02P10/20
Inventor 杨洪英佟琳琳巩恩普
Owner NORTHEASTERN UNIV LIAONING
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