A bioleaching method for strengthening chalcopyrite and bornite

A bioleaching and bornite technology, applied in the direction of improving process efficiency, can solve the problems of slow leaching rate and low microbial leaching rate, and achieve the effect of strengthening bioleaching
CN105039693BInactive Publication Date: 2017-09-22CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2017-09-22
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a method for strengthening biological leaching of chalcopyrite and bornite. One or more of acidithiobacillus ferrooxidans, acidithiobacillus caldus and leptospirillum ferriphilum are used as mineral leaching microorganisms. The ratio of the chalcopyrite to the bornite is controlled to be 5:1-1:5. In the leaching process, the stirring speed is controlled to be 100-600 rpm. The pH value of a solution is controlled to be 1.5-2.5, the electric potential of the solution is 350-480 mV (Ag / AgCl is a reference electrode), the chalcopyrite and the bornite can be leached in a cooperative mode, and the Cu leaching rate is obviously increased. According to the method, through reasonable ore blending of the chalcopyrite and the bornite, proper leaching technological conditions are controlled, and the biological leaching efficiency of the chalcopyrite and the bornite is improved. The method is efficient, simple and easy to operate.
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Description

technical field

[0001] The invention relates to a biological leaching method for strengthening chalcopyrite and bornite, belonging to the technical field of biological hydrometallurgy. Background technique

[0002] my country's current dependence on foreign copper metal is as high as 75%-80%, and the proven copper resources are seriously insufficient. With the development of the world economy, high-grade copper ore resources are consumed in large quantities, and copper ore resources tend to be diluted, low-grade, and difficult to handle. Traditional techniques cannot effectively and economically utilize this part of the resources. With its unique advantages, microbial metallurgy has become an important frontier technology for efficient and economical development and utilization of this part of resources. At present, the targets of copper biohydrometallurgy industry are mostly secondary copper sulfide ores dominated by chalcopyrite, while the most abundant copper reserves on...

Claims

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