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Efficient sulfur-oxidizing bacteria and rapid heating method for low-sulfur copper mine leaching process in Alpine region

A technology of sulfur-oxidizing bacteria and sulfur-oxidizing acid, which is applied to the process of rapid temperature rise in the leaching process of low-sulfur copper ore in alpine regions, and the field of high-efficiency sulfur-oxidizing bacteria, can solve the problems of low temperature, poor permeability and slow leaching rate, and achieve simple equipment. , the effect of low cost and short process

Active Publication Date: 2016-07-20
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

[0006] Another object of the present invention is to provide a method for rapid temperature rise in the leaching process of low-sulfur copper ore, so as to solve the technical problems related to poor permeability, low temperature, and slow leaching rate in the heap leaching process of copper ore in alpine regions, and ensure the high efficiency of the biological heap leaching project. ,Stable operation

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  • Efficient sulfur-oxidizing bacteria and rapid heating method for low-sulfur copper mine leaching process in Alpine region

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Embodiment 1

[0035] The ore used comes from a copper mine in Tibet. The temperature in the mining area is low, and the maximum temperature is lower than 30°C. The main element analysis of the copper mine is shown in Table 1, and the main mineral composition containing copper is shown in Table 2.

[0036] Table 1 Multi-element analysis

[0037] element name

Cu

Fe

Mg

Ca

S

SiO 2

Content (%)

0.75

4.21

2.14

1.56

0.48

76.54

[0038] Table 2 Phase analysis of copper minerals

[0039]

Copper in copper oxide

copper in secondary copper sulfide

copper in primary copper sulfide

copper in silicate

Occupancy / wt%

53.67

15.49

29.58

1.26

[0040] The valuable metal element of this ore is copper, which is a typical oxygen-sulfur mixed ore with low sulfur content. Using traditional flotation, the recovery rate is low, and using conventional sulfuric acid leaching, the copper su...

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Abstract

The invention discloses an efficient sulfur-oxidizing bacteria with a strain name of Acidithiobacillus thiooxidans Retech DW-II. The strain is preserved in China General Microbiological Culture Collection Center, Institute of Microbiology of the Chinese Academy of Sciences, No.3, Court No.1, Beichen West Road, Chaoyang District, Beijing on September 10, 2014, and has accession number of CGMCCNo. 9625. The invention also provides a rapid heating method for low-sulfur copper mine leaching process in Alpine region. The method comprises the steps of: crushing ore to -50mm, mixing with pyrite powder, conducting sulfuric acid slaking and granulation to improve the permeability of the stock heap and provide sufficient energy for bacteria; and finally adding the efficient sulfur-oxidizing bacteria CGMCC No. 9625. The method speeds up the initial rate of oxidation of the pyrite ore heap, and provides sufficient heat for the stock heap, so that temperature of the stock heap rapidly increases to above 40 DEG C.

Description

technical field [0001] The invention belongs to the biological heap leaching process of low-grade copper ore, in particular to a high-efficiency sulfur oxidizing bacteria and a process for rapidly heating up the leaching process of low-sulfur copper ore in alpine regions. Background technique [0002] Biometallurgy technology has the characteristics of low cost, short process, and environmental friendliness. It has been widely used in the development of low-grade resources such as gold, uranium, copper, nickel, and cobalt, and has gradually replaced pyrometallurgy technology with high energy consumption. However, the long leaching cycle has always been a bottleneck technical problem restricting the large-scale engineering application of biometallurgy technology. The core of biometallurgy technology is the rapid propagation of efficient leaching bacteria and the oxidation and dissolution of microorganisms, oxidants and valuable metal minerals. Providing sufficient energy for ...

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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 武彪温建康尚鹤刘学
Owner 有研资源环境技术研究院(北京)有限公司
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