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Middle thermophilic bacteria and chemical and biological combined heap leaching technique for low-grade primary copper ore

A technology for copper sulfide ore and thermophilic bacteria is applied in the field of combined chemical and biological heap leaching process, which can solve the problems of high cost, complex treatment process and heavy environmental pollution.

Active Publication Date: 2007-10-31
有研资源环境技术研究院(北京)有限公司
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Problems solved by technology

Due to the strict quality requirements of the flotation concentrate, the process cannot handle the low-grade primary copper sulfide ore or the processing process is very complicated, and has the disadvantages of high cost, high energy consumption, heavy environmental pollution and low recovery rate of copper metal. Not suitable for processing primary copper sulfide ores in low-grade and remote areas
Among the proven primary copper sulfide ore resources in China, most of them are remote and low-grade primary copper sulfide ores. In addition, there are also a large number of waste ores below the cut-off grade of traditional separation technology in old mining areas. Some traditional dressing and smelting technologies or process development have no economic benefits or very poor economic benefits

Method used

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  • Middle thermophilic bacteria and chemical and biological combined heap leaching technique for low-grade primary copper ore

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Embodiment Construction

[0017] Breeding of medium thermophilic bacteria (Sulfobacillus thermosulfidooxidans Retech-MTC-1): the acidic mine water containing medium thermophilic bacteria was collected from the Mojiang mining area, and the above mine water was added to the improved Norrison basic culture medium for breeding. Then carry out leaching and domestication. The inorganic salt composition of the improved basal culture solution is: (NH 4 ) 2 SO 4 0.5g / L, KCl 0.1g / L, K 2 HPO 4 0.2g / L, MgSO 4 ·7H 2 O0.5g / L, Ca(NO 3 ) 2 0.01g / L, yeast extract 0.02%; energy matrix: elemental S. The domestication of bacteria is to add low-grade primary copper sulfide ore powder with a particle size of less than 0.076mm to the tap water containing the above-mentioned nutrients. The concentration of the slurry formed after adding the ore powder is 1-20% by weight, and the pH value is between 1.5-2.5. between; the oxidation-reduction potential of the domesticated bacterial solution is 350-450mV (SCE), and th...

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Abstract

The invention discloses a chemical and biological combining push soak craft of middle grade thermophile and low-grade primary cupric sulfide ore, which comprises the following steps: utilizing diluted sulfate liquor with Fe2+ ion; pre-processing low-grade primary cupric sulfide ore; choosing domestic middle grade thermophile (Sulfobacillus thermosulfidooxidans Retech-MTC-1) with reinforced sulfur oxidability; leaching primary cupric sulfide ore; reclaiming the copper; extracting leachate in pretreating step; entering organic phase into downstream back extraction process; extracting eligible leachate in middle grade thermophile step; backing the water phase to soaking pile; merging organic phase and the organic phase in pretreating step; entering into downstream back extraction process. This craft possesses short flow process, simple device, low coat and high reclaiming ratio, which can increase the reclaiming ratio of copper.

Description

technical field [0001] The invention relates to a chemical and biological combined heap leaching process for medium thermophilic bacteria and low-grade primary copper sulfide ore. This process mainly utilizes Fe-containing 2+ The primary copper sulfide ore is pretreated with a dilute sulfuric acid solution of ions, followed by releaching of the mineral with moderately thermophilic bacteria with strong sulfur oxidation activity. Background technique [0002] The traditional processing technology of primary sulfide copper ore is ore crushing, ore grinding, flotation, and flotation concentrate pyromelting. Due to the strict quality requirements of the flotation concentrate, the process cannot handle the low-grade primary copper sulfide ore or the processing process is very complicated, and has the disadvantages of high cost, high energy consumption, heavy environmental pollution and low recovery rate of copper metal. It is not suitable for processing primary copper sulfide or...

Claims

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Application Information

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IPC IPC(8): C12N1/20C22B3/18
CPCY02P10/20
Inventor 舒荣波阮仁满温建康
Owner 有研资源环境技术研究院(北京)有限公司
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