Method for reinforcing microbiological leaching effect of zinc blende

A technology for microbial leaching and leaching microorganisms, which is applied in the direction of improving process efficiency, can solve the problems of low leaching rate and poor oxidative decomposition effect of sphalerite, and achieves the advantages of improving leaching rate, solving long leaching time and improving oxidative decomposition. Effect

Inactive Publication Date: 2016-07-06
CENT SOUTH UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for strengthening the microbial leaching of sphalerite, solve the problems of poor oxidation and decomposition effect of microorganisms on sphalerite and low leaching rate, and provide technical guidance for the efficient development and utilization of sphalerite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027]The artificial co-culture system composed of Acidithiobacillus caldus, Sulfobacillus thermosulfidooxidans, Leptospirilum ferriphilum and Ferroplasmathermophilum leached sphalerite system with pyrite: sphalerite and Pyrite ore is pulverized into particles of 0.037mm~0.074mm, and put into 9K medium containing microbial enrichment, the leaching condition is that the pulp concentration is 2%, and the microbial concentration of the leaching solution after inoculation is 1.0×10 6 pc / ml, pH value is 2.0, culture temperature is 40 DEG C, shaker rotating speed 170rpm, leaching 30 days, wherein sphalerite and pyrite add in equal proportion. When sphalerite is in the microbial leaching system alone, after leaching for 12 days, the pH value is 1.72, the iron ion concentration is 0.2g / L, and the leaching rate of sphalerite is only 48.0%; add the same amount of 10g / L pyrite system In leaching for 12 days, the pH value was 1.48, the iron ion concentration was 0.87g / L, and the leaching ...

Embodiment 2

[0029] The artificial co-culture system composed of Acidithiobacillus caldus, Sulfobacillus thermosulfidooxidans, Leptospirillum ferriphilum and Ferroplasmathermophilum leached the sphalerite system with chalcopyrite: the sphalerite and The chalcopyrite ore is pulverized into particles of 0.037mm~0.074mm, and put into the 9K medium containing the artificial co-cultivation system. The leaching condition is that the pulp concentration is 2%, and the microbial concentration of the leaching solution after inoculation is 1.0×10 6 pc / ml, pH value is 2.0, culture temperature is 40 DEG C, shaking table rotating speed 170rpm, leaching 30 days, wherein sphalerite and chalcopyrite add in equal proportion. When sphalerite is in the microbial leaching system alone, after leaching for 12 days, the pH value is 1.72, the iron ion concentration is 0.2g / L, and the leaching rate of sphalerite is only 48.0%; add the same amount of 10g / L chalcopyrite system In leaching for 12 days, the pH value wa...

Embodiment 3

[0031] The artificial co-cultivation system composed of Acidithiobacillus caldus, Sulfobacillus thermosulfidooxidans, Leptospirillum ferriphilum and Ferroplasmathermophilum leaching sphalerite system with pyrite and chalcopyrite added: the Sphalerite, pyrite and chalcopyrite ore are pulverized into particles of 0.037mm~0.074mm, and put into 9K medium containing artificial co-cultivation system. The leaching condition is that the pulp concentration is 2%. 1.0×10 6 pc / ml, pH value is 2.0, culture temperature is 40 DEG C, shaker rotating speed 170rpm, leaching for 30 days, wherein sphalerite, pyrite and chalcopyrite add in equal proportions. When sphalerite is in the microbial leaching system alone, after leaching for 12 days, the pH value is 1.72, the iron ion concentration is 0.2g / L, and the leaching rate of sphalerite is only 48.0%; add the same amount of 0.67g / L pyrite And in the chalcopyrite system, after leaching for 12 days, the pH value was 1.27, the iron ion concentrati...

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Abstract

The invention discloses a method for reinforcing the microbiological leaching effect of zinc blende. The method comprises the steps of 1, smashing zinc blende sample ore into particles and smashing iron pyrite sample ore and / or copper pyrite sample ore to be added into particles; 2, sterilizing a culture medium, the zinc blende and iron pyrites and / or copper pyrites to be added at high temperature and high pressure; 3, adding the sterilized zinc blende into a shake flask containing the culture medium, then adding the iron pyrites or the copper pyrites into the shake flask and carrying out inoculation of mineral leaching microorganisms; 4, placing the shake flask in the step 3 on a constant-temperature shaker for cultivation; 5, measuring the leaching efficiency of zinc in the leaching process. According to the method, by adding the iron pyrites in a microbiological leaching system of the zinc blende, the pH value in solutions is low, the concentration of iron ions is high, the redox potential is high, oxygenolysis of the zinc blende is reinforced under the synergistic effect of the microorganisms and physical and chemical factors, and the leaching efficiency of the zinc can be improved obviously. The method provides technological guidance for efficient leaching of the zinc blende.

Description

technical field [0001] The invention belongs to the technical field of microbial metallurgy of sulfide ores, and in particular relates to a method for strengthening microbial leaching of sphalerite. Background technique [0002] Due to the long-term mining of the world's total mineral resources, mineral resources have gradually changed from high-grade to low-grade, which has increased the difficulty of dressing and smelting. Traditional dressing and smelting technology has encountered challenges. It is small and can effectively develop low-grade mineral resources and has attracted much attention. It has become a hot spot in the global mining and metallurgy field, and has been widely researched and industrialized in copper ore and uranium ore. [0003] Microbes act on minerals, and it is generally believed that there are two mechanisms, including direct action and indirect action. Direct effect, that is, the main function of microorganisms is to adsorb on the surface of mine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/18C22B19/20
CPCC22B3/18C22B19/02C22B19/26Y02P10/20
Inventor 尹华群
Owner CENT SOUTH UNIV
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