Method for catalyzing biological leaching of copper cobalt ore through silver ions

A technology of bioleaching and copper sulfide, which is applied in the direction of improving process efficiency, can solve the problems of rare reports on the impact of cobalt-containing minerals on bioleaching, and achieve good application prospects, low production costs, and low environmental pollution.

Inactive Publication Date: 2018-02-27
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the bioleaching of sulfide minerals catalyzed by the addition of silver ions is mai

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Inoculate the bacterium liquid containing acidic Thiobacillus ferrooxidans into the 9K medium to prepare the bacterium-containing culture medium, and the inoculum volume ratio of the bacterium liquid to the 9K medium is 1:5. Use a sulfuric acid solution with a concentration of 2N to adjust the pH value of the culture solution to 1.8, then place it in a constant temperature shaking box, and cultivate it at a temperature of 30-40°C and a rotation speed of 160rpm until the potential of the bacterial solution is 580-650mV , to obtain culture broth.

[0019] In the sulfur-copper-cobalt ore powder, the part with a particle size of ≤75 μm accounts for 80% of the total weight of the ore powder, and the mass percentage of cobalt in the ore powder is 0.1%. The sulfur copper cobalt ore powder is added into the culture liquid to make a pulp, and the mass concentration of the pulp is 5%. Then add silver nitrate solution, the amount added is Ag + The concentration of ions in the pu...

Embodiment 2

[0022] Inoculate the bacterium solution containing acidic Thiobacillus ferrooxidans into the 9K medium to prepare the bacterium-containing culture solution, and the inoculum volume ratio of the bacteria solution to the 9K medium is 1:10. Use a sulfuric acid solution with a concentration of 2N to adjust the pH value of the culture solution to 1.6, then place it in a constant temperature shaking box, and cultivate it at a temperature of 30-40°C and a rotation speed of 200rpm until the potential of the bacterial solution is 580-650mV , to obtain culture broth.

[0023] In the sulfur-copper-cobalt ore powder, the part with a particle size of ≤75 μm accounts for 90% of the total weight of the ore powder, and the mass percentage of cobalt in the ore powder is 1%. The sulfur copper cobalt ore powder is added into the culture liquid to make a pulp, and the mass concentration of the pulp is 10%. Then add silver nitrate solution, the amount added is Ag + The concentration of ions in t...

Embodiment 3

[0026] Inoculate the bacterium solution containing acidic Thiobacillus ferrooxidans into the 9K medium to prepare the bacterium-containing culture solution, and the inoculum volume ratio of the bacteria solution to the 9K medium is 1:8. Use a sulfuric acid solution with a concentration of 3N to adjust the pH value of the culture solution to 1.2, then place it in a constant temperature shaking box, and cultivate it at a temperature of 30-40°C and a rotation speed of 180rpm until the potential of the bacterial solution is 580-650mV , to obtain culture broth.

[0027] In the sulfur-copper-cobalt ore powder, the part with a particle size less than or equal to 75 μm accounts for 70% of the total weight of the ore powder, and the mass percentage of cobalt in the ore powder is 0.5%. The sulfur copper cobalt ore powder is added into the culture liquid to make a pulp, and the mass concentration of the pulp is 15%. Then add silver nitrate solution, the amount added is Ag + The concent...

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Abstract

The invention relates to a method for catalyzing biological leaching of copper cobalt ore through silver ions, and belongs to the technical field of biometallurgy. The method comprises the following steps of 1, a bacterial solution containing acidithiobacillus ferrooxidans are inoculated into a culture medium according to a certain inoculation amount so as to prepare a bacteria-containing culturesolution; 2, the pH value of the culture solution is adjusted by using a sulfuric acid solution, then the culture solution is put in a constant-temperature oscillation box for culture to obtain a culture bacterium solution; and 3, sulfur-copper-cobalt ore powder is added into the culture bacterium solution to prepare ore pulp, then a silver nitrate solution is added for leaching, and the pH valueof the ore pulp is controlled in the leaching process by using the sulfuric acid solution. The method has the advantages of being high in leaching rate, low in medicament consumption, low in production cost, low in environmental pollution and simple and convenient to operate, and the method has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of biometallurgy, and in particular relates to a silver ion-catalyzed bioleaching method of copper-cobalt sulfide ore. Background technique [0002] Biometallurgy technology is a new smelting process and one of the most competitive and developing technologies in the field of metallurgy. It is known as a strategic technology for mineral resource processing in the 21st century. It has the characteristics of low production cost, less environmental pollution, and easy operation, and is one of the main technologies for processing various low-grade ores, tailings and waste ores. With the continuous reduction of high-grade and easy-to-handle mineral resources and the increasingly serious environmental problems, biometallurgy technology will be one of the technologies with great development potential in the field of metallurgy, and its development prospects are very broad. However, slow leaching rate and long leach...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B23/00
CPCC22B3/18C22B23/0407Y02P10/20
Inventor 刘伟刘畅张树江孙峰黄海峰
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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