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

A technology of complex flora and application methods, applied in biochemical equipment and methods, methods based on microorganisms, bacteria, etc., can solve the problems of long cycle, not widely used, slow bioleaching speed, etc., to improve resistance, Strong specificity and good environmental adaptability

Active Publication Date: 2015-04-29
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

[0028] Sulfide ore stirred tank leaching

[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 experiment was carried out in a stirred tank reactor with a slurry concentration of 10%. Bacillus sulfoacidophilus CCTCC NO: M2010203, Thiobacillus ferrooxidans CCTCC AB207053, Thiobacillus acidophilus thiooxidans CCTCC AB 206196, Leptospira ferrooxidans CCTCC AB206158, thiobacillus alberta Bacteria ATCC 35403, Leptospira ferrophila DSM 14647, Mesophilic Sulfobacillus sulfooxidans CCTCC AB207045, Thiobacillus thermophilus CCTCC AB207044, Thermophilic acidophilus CCTCC AB207143 T , The pure cultures of Sulfolobus metallococcus CCTCC AB207047, Metallococcus diligiosus CCTCC AB 206192, acid bacterium CCTCC AB207048 and Brucella bacterium CCTCC AB206222 were collected by centrifugation and mixed in proportion. ...

Embodiment 2

[0036] Heap leaching of low-grade sulfide ore

[0037] The low-grade sulfide ore used in this embodiment comes from the Yulong copper mine in Tibet and contains 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%.

[0038] Lay the bottom layer and impermeable layer. The bottom layer is coarse sand with a thickness of about 50mm. On the anti-seepage layer, use the pre-crushed large-particle ore (15-25mm) as the buffer layer of the storage yard; continue to pile the broken small-particle ore (10-15mm); the pile height is 6-7m, long The width is 20-25m. After the pile is built, it is sprayed with dilute sulfuric acid solution (pH 1.0-2.0) in advance. After the sprayed exudate pH stabilizes to 1.0-2.0, the method is the same as that described in Example 1. Start intermittent spray for the obtained mixed flora; spray intensity is 10-15L / m 2 / h, after spraying for 10...

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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 a high-efficiency leaching sulfide ore mixed flora and its compounding and application process, belonging to the field of biological hydrometallurgy. Background technique: [0002] Mineral resources are an important material foundation for the construction of human society and the national economy. Mining, as a basic industry, supports the demand for raw materials in other industries. The rapid economic growth during industrialization is closely related to the massive consumption of mineral resources. At this stage, 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 the majority of 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; the average grade of copper ore in m...

Claims

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Application Information

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Patent Type & Authority Patents(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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