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Multiple guide shell gas circulating bioreactor bacteria ore leaching and ore leaching bacteria culture

A technology of bioreactors and reactors, applied in the direction of improving process efficiency, etc., can solve the problems of affecting ore leaching efficiency, complex structure, high energy consumption, etc.

Inactive Publication Date: 2007-08-15
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stirred tank bioreactor not only has a complex structure and high energy consumption, but also due to the violent stirring effect, the ore sand has a strong abrasive effect on the microbial cells, causing the bacteria to die, which greatly affects the leaching efficiency.

Method used

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  • Multiple guide shell gas circulating bioreactor bacteria ore leaching and ore leaching bacteria culture
  • Multiple guide shell gas circulating bioreactor bacteria ore leaching and ore leaching bacteria culture
  • Multiple guide shell gas circulating bioreactor bacteria ore leaching and ore leaching bacteria culture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1 Air circulation bioreactor with three diversion cylinders The pH of arsenic-containing gold concentrate is 2.0, and the biological pre-oxidation and arsenic removal bioreactor is made of plexiglass at 40°C and contains three diversion cylinders; the total volume of the reactor 10L, working volume 7L; reactor tank height 1000mm, diameter 120mm; guide tube height 600mm, diameter 70mm.

[0050] Gold ore powder, with a particle size of 200 mesh, contains 56.0g / t gold, 10.04% arsenic, and 14.60% sulfur.

[0051] Bacterial species: Thiobacillus caldus MTH-04 and Leptospirillum ferrooxidans MLH04.

[0052] Strain preparation and inoculation: Thiobacillus caldus MTH-04 and Leptospirillum ferrooxidans MLH04 respectively use Starky-S 0 Culture medium and 9K medium, 300mL Erlenmeyer flask with 100mL liquid volume, 40°C, pH 2.0, shaker 100r / min shaking culture until late exponential. The two bacterial solutions are mixed at a ratio of 1:1, the inoculation amount is 10% ...

Embodiment 2

[0060] Example 2 Three-diffuser gas circulation bioreactor, arsenic-containing gold concentrate pH 3.0, biological pre-oxidation and arsenic removal at 40°C

[0061] The initial pH of the slurry is 3.0, the temperature is 40° C., and other conditions are the same as in Example 1.

[0062] After 6 days of leaching reaction, the arsenic removal rate reached 88.4%.

Embodiment 3

[0063] Example 3 Three-diffuser gas circulation bioreactor, arsenic-containing gold concentrate, pH 2.0, biological pre-oxidation and arsenic removal at 43°C

[0064] The initial pH of the pulp is 2.0, the temperature is 43° C., and other conditions are the same as in Example 1.

[0065] After 6 days of leaching reaction, the arsenic removal rate reached 87.1%.

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PUM

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Abstract

The invention discloses a new type immersion ore bioreactor to proceed biological oxidation of sulfide mineral in biological metallurgical technical domain, which is characterized by the following: adopting internal ring gas-flow elevating type reactor; using compressed air as liquid hoisting power to accelerate the macrography mixing of material and mass transfer course; and providing oxygen for growth of microbe and biological oxidation of mineral; lightening the attrition and damage of microbiological thallus caused by ore sand greatly; comparing to traditional stirring type immersion ore bioreactor; composing by cylindrical tank and bottom of tank; assembling three built-in type guild shell to decrease the height of reactor; making the high diameter ratio (H / D) reach 1-1.5 range of the reactor. This invention possesses merits of soft stirring, small hurt for cell, good mass transfer effect and simple structure, which compared to traditional method.

Description

technical field [0001] The invention belongs to the technical field of biometallurgy, and designs and uses a novel ore leaching bioreactor which has low damage to ore leaching microorganisms and is easy to enlarge to carry out biological oxidation of sulfide minerals by ore leaching microorganisms. Background technique [0002] Non-ferrous metals are essential basic materials and important strategic materials for the development of the national economy, national defense industry and science and technology, and are widely used in important fields such as aviation, aerospace, sophisticated weapons, information, transportation and energy. The consumption of several major metals in my country ranks first in the world and is increasing year by year at a high speed. However, due to the constraints of resources and mining technology, my country's mineral resources are becoming increasingly exhausted! According to the current proven resource reserves and mining technology calculati...

Claims

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Application Information

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IPC IPC(8): C22B3/18
CPCY02P10/20
Inventor 林建群曾东明林建强
Owner SHANDONG UNIV
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