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Compound bacterium community capable of efficiently leaching sulphide ore, and compounding method and application method thereof

A technology of compound flora and application methods, applied in biochemical equipment and methods, microorganism-based methods, bacteria, etc., can solve the problems of long cycle, not widely used, slow bioleaching leaching speed, etc., to improve resistance, Strong exclusivity and good environmental adaptability

Active Publication Date: 2013-11-20
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the most significant problem of bioleaching is that the leaching speed is slow and the cycle is long, and its application is not widespread, especially in China.

Method used

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  • Compound bacterium community capable of efficiently leaching sulphide ore, and compounding method and application method thereof
  • Compound bacterium community capable of efficiently leaching sulphide ore, and compounding method and application method thereof
  • Compound bacterium community capable of efficiently leaching sulphide ore, and compounding method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The sulfide ore used in this example comes from the Dongshengmiao Copper Mine in Inner Mongolia. The composition of the sulfide ore is as follows (w / w): chalcopyrite 60%, pyrrhotite 10%, sphalerite 15%, galena 5%. The leaching experiments were carried out in a stirred tank reactor with a slurry concentration of 10%. Acidophilus sulfurobacillus CCTCC NO:M2010203, Acidophilus ferrooxidans CCTCC AB207053, Acidophilus sulfuroxidans CCTCC AB206196, Acidophilus ferrooxidans CCTCC AB206158, Alberta acid sulfur rods used for inoculation Bacteria ATCC35403, Leptospira ferrobacter DSM14647, Mesophilic Sulfobacillus CCTCC AB207045, Thermophilic Thiobacillus CCTCC AB207044, Thermoacidophilic Ferrobacter CCTCC AB207143 T , Sulfolobus metallobus CCTCC AB207047, Metallococcus industriousness CCTCC AB206192, Acidbacterium manzae CCTCC AB207048 and Acidbacterium brucella CCTCC AB206222 were collected by centrifugation and mixed in proportion.

[0030] Before mixing, the various bacter...

Embodiment 2

[0038] The low-grade sulfide ore used in this example is from the Yulong Copper Mine in Tibet, containing 2.95% copper. The copper phase distribution is (w / w): primary copper sulfide 21.36%, secondary copper sulfide 65.08%, free copper oxide 10.17%, combined copper oxide 3.39%.

[0039] Lay the bottom layer and anti-seepage layer. The bottom layer is coarse sand with a thickness of about 50 mm. On the anti-seepage layer, the pre-broken large-grained ore (15-25mm) is used as the buffer layer of the stockyard; continue to pile up the crushed small-grained ore (10-15mm); the heap height is 6-7m, the length The width is 20-25m each. After the pile is built, it is pre-sprayed with dilute sulfuric acid solution (pH 1.0-2.0). After the pH of the sprayed seepage is stabilized to 1.0-2.0, the method described in Example 1 is used for connection. The obtained mixed flora starts intermittent spraying; the spraying intensity is 10-15L / m 2 / h, after spraying for 10-16 hours, stop sprayi...

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Abstract

The invention discloses a compound bacterium community capable of efficiently leaching a sulphide ore, and a compounding method and an application method thereof, and belongs to the technical filed of wet-process metallurgy. Aiming at a biological leaching mechanism of the sulphide ore and the physiological-biochemical characteristics of microorganisms, a community capable of efficiently leaching the sulphide ore is compounded by a plurality of mineral leaching microorganisms, wherein the mineral leaching microorganisms comprise marine bacteria which come from deep-sea hydrothermal vents and are capable of enduring high concentration sodium chloride, sulfur-oxidized bacteria, iron-oxidized bacteria and archaea which are from a freshwater environment, autotrophic bacteria and facultative heterotrophic bacteria. Not only can the difficult problem that the mineral leaching microorganisms from the freshwater environment are intolerance of sodium chloride be solved, but also microorganisms required by oxidation and dissolution of the sulphide ore and diversity of chemical reactions are guaranteed. The compound bacterium community can obviously increase leaching efficiency and leaching rate of the sulphide ore such as copper pyrites and can be applied in a leaching process and a dump leaching process of a stirring tank. A certain basis for popularization and application of biological metallurgy of the sulphide ore is provided by the invention.

Description

Technical field: [0001] The invention relates to the high-efficiency leaching of mixed bacteria groups of sulfide ore and its compounding and application technology, belonging to the field of biological hydrometallurgy. Background technique: [0002] Mineral resources are an important material basis for the construction of human society and the national economy. As a basic industry, mining supports the demand for raw materials in the production of other industries. The rapid economic growth in the process of industrialization is closely related to the massive consumption of mineral resources. At present, more than 80% of my country's industrial raw materials come from mineral resources. However, the salient features of my country's mineral resources are low-grade, complex and difficult to handle, and mostly small and medium-sized mines. For example, the average grade of manganese ore in my country is only 22%, and rich ore (25%) only accounts for 6.7% of the total reserves;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C22B3/18C12R1/01
CPCY02P10/20
Inventor 周洪波陈新华王玉光曾伟民邱冠周
Owner CENT SOUTH UNIV
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