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Microbiological oxidation and reduction coupling leaching method for valuable metal in manganese oxide ore

A technology for manganese oxide ore and valuable metals, applied in the field of microbial metallurgical beneficiation, can solve the problems of low quantity and slow growth, and achieve the effects of high total biomass, improved efficiency and fast growth

Inactive Publication Date: 2011-08-24
TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI +1
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Problems solved by technology

Although the microbial leaching method has an efficient and stable leaching rate, the commonly used microbial leaching strains are chemoautotrophic microorganisms, which grow slowly and have low numbers. They are generally used for leaching precious metals such as gold and uranium or as sludge heavy metal leaching , tailings, and waste ore treatment, not suitable for leaching low-grade manganese ore in industry
Moreover, the growth of traditional chemoautotrophic microorganisms will be inhibited by the organic matter in the system, and it is impossible to increase the growth rate of the strain by adding organic matter

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: Utilize pyrite as the provider of ferrous sulfate

[0022] 1. Domestication of leaching strains

[0023] (1) Expanded cultivation of ore-leaching bacteria

[0024] Alicyclobacillus BM strain was inoculated into the culture medium and cultured at 25-35°C until OD 600 Stop culturing when reaching 0.8-1.0, obtain the expanded culture medium of BM bacterial strain;

[0025] The medium is BAM medium. In order to increase the carbon source of the medium and adapt the BM strain to a higher concentration of ferrous ion solution, glucose with a concentration of 0.5% to 1% by mass and 4 to 20% by mass of sulfurous acid were added to the BAM medium. Iron; adjust the pH of the medium to 1.5 to 5. Shake flask culture is used for culture, the rotation speed is 100 rpm to 180 rpm, and the culture temperature is 25 to 35°C.

[0026] (2) Domestication of ore-leaching bacteria:

[0027] a. Bacteria adaptation to pyrite in domesticated seed solution

[0028] Based on ...

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Abstract

The invention relates to a microbiological oxidation and reduction coupling leaching method for valuable metal in manganese oxide ore, characterized in that the leaching microbe is alicyclobacillus BM strains with the preservation number of CGMCC4500, and ferrous ions are added to the culture medium of the alicyclobacillus BM strains. In the invention, the leaching strain alicyclobacillus BM is used for leaching the valuable metal in the manganese oxide ore. The microbe not only can use carbon dioxide as a carbon source and use ferrous oxide ions to acquire energy, but also can use organic matters to realize quick and massive proliferation, thereby improving the leaching rate and the leaching effect, overcoming the defects of slow growth and small quantity of chemoautotrophic microbes, and enabling bioleaching to be applied to industrial leaching of low-grade manganese ore.

Description

technical field [0001] The invention belongs to the technical field of microbial metallurgy ore dressing, and in particular relates to a microbial oxidation-reduction coupling leaching method for valuable metals in manganese oxide ore. Background technique [0002] Pyrolulurite, especially low-grade pyrolusite, is the main component of manganese ore resources in my country. my country is known to have distribution characteristics of ferromanganese ore in the north, iron in the south and manganese in the south. However, with the gradual consumption of medium and high-grade manganese ore resources in the south, researchers and mining companies have turned their attention to the rich low-grade manganese ore in the north. However, the low-grade manganese ore in the north has many impurities and low manganese content, which makes the traditional physical and chemical leaching process not suitable for the mining of manganese ore in the north. [0003] Microbial metallurgy has the...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B23/00C22B21/00C22B26/22C22B47/00
Inventor 韩一凡郑承纲张小霞温丹黄志勇
Owner TIANJIN INST OF IND BIOTECH CHINESE ACADEMY OF SCI
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