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Light-intensified bioleaching method for semiconductor minerals

A bioleaching, semiconductor technology, applied in the direction of improving process efficiency, can solve problems such as affecting the leaching effect of ore, and achieve the effects of improving bioleaching rate, easy control of conditions, and simple equipment

Active Publication Date: 2015-04-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing published technology only studies how minerals affect the growth of bacteria under light conditions, and has not further explored how bacteria affect the leaching effect of ores under light conditions.

Method used

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  • Light-intensified bioleaching method for semiconductor minerals
  • Light-intensified bioleaching method for semiconductor minerals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Acidophilus ferrooxidans in 2×10 7 The amount of inoculum was inoculated in 100ml 9K medium containing 2g chalcopyrite, and exposed under the conditions of light intensity of 8500lux, 6000lux, 4000lux, 3500lux and 0lux, temperature of 28-35°C, and aeration rate of 0.9L / h Gas leaching, take samples every 2-3 days to measure the copper ions in the leaching solution, see the results figure 1 .

[0019] Conclusion: Light can promote the leaching of chalcopyrite.

Embodiment 2

[0021] Acidophilus ferrooxidans in 2×10 7 The amount of inoculum was inoculated in 100ml of 9K medium containing 2g of chalcopyrite, and the shake flask was carried out under the conditions of light intensity of 8500lux, 6000lux, 4000lux, 3500lux and 0lux, temperature of 28-35°C, and rotation speed of 90-100r / min. Leaching, sampling and determination of copper ions in the leachate every 2-3 days, the results are shown in figure 2 .

[0022] Conclusion: Illumination can promote the leaching of chalcopyrite, and shake flask culture can greatly increase the leaching rate compared with aerated culture.

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Abstract

The invention discloses a light-intensified bioleaching method for semiconductor minerals. Under the conditions of illumination and darkness of acidithiobacillus ferrooxidans, respectively shaking a bottle; aerating; piling; and making a column and leaching out copper pyrites. Under the illumination condition, the leaching efficiencies of copper pyrites of these modes are higher than that under a dark condition, and particularly the shake-flask culture effect under the illumination condition is remarkable. The method has important significance in improving level of comprehensive utilization of minerals (copper pyrites) of semiconductor property and applying the semiconductor minerals as an optical catalyst in mineral leaching industry.

Description

technical field [0001] The invention belongs to the field of biological leaching, and in particular relates to a method for light-enhanced microbial leaching. Background technique [0002] With the rapid development of society, people's demand for mineral resources is increasing, and mineral resources are gradually depleted, especially mineral resources with high taste are decreasing, so people pay more and more attention to mining and metallurgy technology In order to improve the level of smelting. Microbial metallurgy technology is a new process produced by combining bioengineering technology and traditional mineral processing technology. The processed mineral resources have a good development prospect in the leaching industry. However, due to its long leaching cycle and low leaching rate, how to strengthen microbial leaching is imminent. At present, some technologies for strengthening microbial leaching mainly include: 1) Biological methods. 2) physical method, magneti...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B15/00
CPCY02P10/20
Inventor 朱建裕周双甘敏杨宝军覃文庆刘学端邱冠周
Owner CENT SOUTH UNIV
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