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Bacterium agitation leaching method of cobalt concentrate

A technology of stirring leaching and concentrate, which is applied in the direction of improving process efficiency, can solve the problems of complex production process, low recovery rate, low grade, etc., and achieve the effects of low labor intensity, low production cost, and small consumption of chemicals

Active Publication Date: 2014-02-12
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low grade and complex production process in the production process, the recovery rate is often low; my country's cobalt production cannot meet the domestic market demand for a long time, and the gap is huge. my country needs to import cobalt from abroad every year to make up for the shortage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Inoculate the mixed bacterial solution containing Microspirillum ferrooxidans, Thiobacillus ferrooxidans and Thiobacillus acidophilus thiooxidans into 9K medium to make a culture medium. The volume ratio is 1:10;

[0024] Use sulfuric acid solution with a concentration of 1N to adjust the pH value of the culture medium to 1.0, then add cobalt sulfate to make the concentration of cobalt ions in the culture medium 1g / L, and then place it in a constant temperature shaker at 44~60°C and rotating speed Under the condition of shaking at 150rpm, the cobalt-resistant ability of the bacteria is domesticated; when the number of bacteria increases to 10 8 When the cell / mL is above, the oxidation of ferrous ions in the culture medium is complete, and the acclimation is over;

[0025] Repeat the above domestication steps to continue to domesticate the bacteria, control the concentration of cobalt ions in the culture solution to be 1g / L higher than the previous domestication for eac...

Embodiment 2

[0029] Inoculate the mixed bacterial solution containing Microspirillum ferrooxidans, Thiobacillus ferrooxidans and Thiobacillus acidophilus thiooxidans into 9K medium to make a culture medium. The volume ratio is 1:20;

[0030] Use a sulfuric acid solution with a concentration of 2N to adjust the pH value of the culture medium to 1.5, then add cobalt sulfate to make the concentration of cobalt ions in the culture medium 1g / L, and then place it in a constant temperature shaker at 44~60°C and rotating speed Under the condition of 200rpm shaking culture, the cobalt-resistant ability of the bacteria is domesticated; when the number of bacteria increases to 10 8 When the cell / mL is above, the oxidation of ferrous ions in the culture medium is complete, and the acclimation is over;

[0031] Repeat the above domestication steps to continue to domesticate the bacteria, control the concentration of cobalt ions in the culture solution to be 1g / L higher than the previous domestication ...

Embodiment 3

[0035] Inoculate the mixed bacterial solution containing Microspirillum ferrooxidans, Thiobacillus ferrooxidans and Thiobacillus acidophilus thiooxidans into 9K medium to make a culture medium. The volume ratio is 1:15;

[0036] Use a sulfuric acid solution with a concentration of 1.5N to adjust the pH value of the culture medium to 2.0, then add cobalt sulfate to make the concentration of cobalt ions in the culture medium 1g / L, and then place it in a constant temperature shaker at 44~60°C and Shaking culture under the condition of rotating speed 240rpm, the cobalt-resistant ability of the bacteria is domesticated; when the number of bacteria increases to 10 8 When the cell / mL is above, the oxidation of ferrous ions in the culture medium is complete, and the acclimation is over;

[0037] Repeat the above domestication steps to continue to domesticate the bacteria, control the concentration of cobalt ions in the culture solution to be 1g / L higher than the previous domestication ...

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PUM

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Abstract

The invention discloses a bacterium agitation leaching method of a cobalt concentrate, and belongs to the technical field of biological metallurgy. The method comprises the following steps that (1) a mixed bacterium solution of ferrous-oxide-containing micro spirrilla, acidophilic thiobacillus ferrooxidans and acidophilic thiobacillus thiooxidans is inoculated into a culture medium; a culture solution is prepared; (2) a pH (potential of hydrogen) value is adjusted; cobaltous sulfate is added; the culture solution is put into a constant-temperature oscillator for culturing; (3) Step 2 is repeated for attenuating bacteria, so that the cobalt ion concentration is increased; (4) the attenuated bacterium solution is inoculated into the culture medium; a secondary culture solution is obtained; air is supplied; stirring is performed; a leaching bacterium solution is prepared; (5) the cobalt concentrate is put into the leaching bacterium solution for leaching. The method is low in labor intensity, small in agent consumption, simple in technological process and equipment requirement, and low in production cost, does not generate exhaust gas, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of biometallurgy, in particular to a bacterial stirring leaching method for cobalt concentrate. Background technique [0002] Cobalt is an important strategic metal. Cobalt has excellent physical, chemical and mechanical properties. It is the main material for manufacturing high-strength alloys, high-temperature-resistant alloys, hard alloys, strong magnetic materials and catalysts. In some aspects, cobalt plays a role It is difficult to be replaced by other metals; with the development of high technology, cobalt is becoming more and more important as a functional material. my country is short of cobalt resources, and the single cobalt ore reserve is only about 2%, most of which exist in the form of symbiotic elements in nickel, copper, iron and other ores. In my country, the source of cobalt is mainly from the recovery of nickel, copper, zinc smelting systems and A large amount of cobalt-containing waste pr...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B23/00
CPCY02P10/20
Inventor 杨洪英佟琳琳
Owner NORTHEASTERN UNIV
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