Compound bacteria adapting to uranium ore leaching system and application thereof

A technology of compound flora and uranium ore, applied in the directions of bacteria, process efficiency improvement, microorganism-based methods, etc., can solve problems such as difficult leaching, and achieve the effect of environmental friendliness and high chemical stability

Active Publication Date: 2017-08-18
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium uranite is insoluble in acid, but soluble in acid after melting with potassium pyrosulfate, and the uranium in it is difficult to be leached in traditional chemical leaching

Method used

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  • Compound bacteria adapting to uranium ore leaching system and application thereof
  • Compound bacteria adapting to uranium ore leaching system and application thereof
  • Compound bacteria adapting to uranium ore leaching system and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1 Comparison of the leaching effects of chemical leaching and microbial complex flora leaching on titanium uranium ore

[0042] In this example, the leaching with sulfuric acid plus potassium chlorate at room temperature is compared with the leaching of microbial metallurgical flora AM12, and the leaching law of titanium uranium ore is discussed.

[0043] (1) Experimental flora: microbial metallurgical flora 05B-10: Leptospirrilium sp., Athidithiobacillus thiooxidans, Athidithiobacillus ferrooxidans, Acidiphilium sp. and Sulfobacillus sp. The inoculation initial concentrations were 60.0%, 30.0%, 5.0%, 1.0% and 4.0% respectively Volume ratio.

[0044] (2) Ore source: a uranium ore titanium uranium ore with a grade of 6.407%.

[0045] (3) Test plan: In this experiment, two groups were designed for comparison, and three groups were paralleled. During the test, shaking table vibration (160r / min) was used. 250ml Erlenmeyer flask, 20g of ore passing through 200 mesh...

Embodiment 2

[0051] Example 2 Electron probe analysis of chemical leaching and microbial complex flora leaching on titanium uranium ore

[0052] In this example, chemical leaching and microbial leaching are analyzed and compared on the raw ore and tailings electronic probe, and the treatment effects of the two methods on titanium-uranium ore are discussed.

[0053] 1) Raw ore:

[0054] Electron probes were carried out on uranium minerals in 4 typical uranium ore thin-section samples from a deposit, and 21 probe points were drilled in total. The mineral composition of the uranium ore, especially the type, particle size, occurrence state and output of the uranium ore were basically ascertained through the results of electronic probe and NEP analysis. After analysis and testing, the uranium minerals in the samples are mainly pitchblende, titanite, uranite and a small amount of uranite. The particle size of uranium minerals varies, most of which are between 10 and 100 μm, and are produced in...

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Abstract

A compound bacteria adapting to a uranium ore leaching system comprises one or several strains of Leptospirrilium sp, Athidithiobacillus ferrooxidans, Acidiphilium sp, Sulfobacillus sp and Athidithiobacillus thiooxidans. Titanium uranium can be effectively leached by utilizing eosinophilic microbial flora of long-term selection, wherein the titanium uranium is leached difficultly by the conventional chemical leaching. According to the compound bacteria adapting to uranium ore leaching system and the application thereof, compared with the chemical method, the energy consumption is less and the production cost is reduced, and the acidity of the tail liquid and the uranium content and other contents in the tail residue are lower than that of the traditional acid method; no additional oxidant is added. Therefore, compared to the conventional chemical acid leaching, the method is more environment-friendly, and useful metal resources in low-grade metal ore can be recycled and used with maximum limit.

Description

technical field [0001] The invention belongs to the field of biometallurgy, and in particular relates to a composite bacterial group adapted to a titanium-uranium ore leaching system and an application thereof. Background technique [0002] Bioleaching is a kind of microbial metallurgy, which refers to the conversion of insoluble valuable metals in minerals into soluble forms by bacteria or bacterial oxidation products and entering the solution, enriching and recovering them from the solution process. Ore leaching microorganisms are often distributed in sulfide ore environments, sulfur-containing hot springs, and acidic wastewater. With sulfides in these environments (such as FeS 2 ) as energy, producing H 2 SO 4 and strong oxidant Fe 3+ , thereby oxidizing the insoluble metal and bringing it into solution in an acidic environment. Reaction E.1-E.6 shows the main reaction process of bioleaching uranium, and the dotted arrows show the chemical reactions. [0003] ...

Claims

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Application Information

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IPC IPC(8): C12N1/20C22B3/18C22B60/02C22B34/12C12R1/01
CPCC12N1/20C22B3/18C22B34/1236C22B60/0221Y02P10/20
Inventor 李江刘亚洁王学刚徐玲玲沈川张瑞徐蔚云孙占学李学礼史维浚饶军牛建国
Owner EAST CHINA UNIV OF TECH
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