Mesophilic acidophilic bacteria and biological heap leaching technique for low-grade cobalt-containing sulfur concentrate

A technology of cobalt sulfur concentrate and acidophilic bacteria, which is applied to the improvement of process efficiency and bacteria, etc., can solve the problems of no recovery and difficulty in improving the cobalt grade in pyrite concentrate

Inactive Publication Date: 2008-06-04
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

Because it is difficult to improve the grade of cobalt in pyrite concentrate ...

Method used

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  • Mesophilic acidophilic bacteria and biological heap leaching technique for low-grade cobalt-containing sulfur concentrate
  • Mesophilic acidophilic bacteria and biological heap leaching technique for low-grade cobalt-containing sulfur concentrate

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Embodiment Construction

[0027] The present invention will be further illustrated below in conjunction with specific implementation examples.

[0028]For example, the main metal minerals in the undeveloped low-grade cobalt-containing sulfide ore in a domestic mine are pyrite, magnetite, false hematite, chalcopyrite, and a small amount of hematite, pyrite, etc. The main gangue minerals include diopside, green phlogopite, Fushanite, scladding and quartz. No independent cobalt minerals were found in the identification of rocks and minerals, and cobalt mainly exists in pyrite in isomorphic form. The low-grade cobalt-containing sulfide ore contains 22.15% S content, 36.7% Fe content, 0.08% Co content, 7.8% total Ca and Mg, and 0.2% Cu content.

[0029] (1) such as figure 2 As shown, the raw ore mined in the mine undergoes such processes as crushing and grinding and reverse flotation to obtain a low-grade cobalt-containing sulfur concentrate. The low-grade cobalt-containing concentrate is concentrated, dehydrat...

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Abstract

The invention relates to mesophilic acidophilic bacteria and a biological heap leaching technology for low-grade cobaltiferous sulfide ore concentrates. The mesophilic acidophilic bacteria have a name of Thiobacillus ferrooxidans Retech V and a collection registration number of CCTCC NO: M202039, and has been stored and collected in China Center for Type Culture Collection (in Wuhan University). The biological heap leaching technology is that: mineral grains which are suitable for biological heap leaching are obtained after coating of crushed stones and solidification of the mineral grains of the low-grade cobaltiferous sulfur-bearing ore concentrates. Cobalt sulphates are obtained through procedures of embankment, heap leaching and trickling by adoption of bacteria with two different growth temperatures, lixivium circulation, purification and deferrization of cobalt pregnant solution, cobalt settlement and so on of the mineral grains. The temperature of 10 to 55 DEG C, the PH value of 1.2 to 1.8 and the adequate Fe concentration of a storage yard in a heap leaching system during the leaching out process are favorable for activity of leaching bacteria. The invention has the advantages of capability of fully utilizing low-grade cobaltiferous sulfide ore resources in old mines, improvement of comprehensive utilization level of mines, conservation of cost, and improvement of profit. The invention is applied in developing cobaltiferous sulfide ore resources in remote areas.

Description

Technical field [0001] The invention relates to a biological heap leaching process of mesophilic acidophilus and low-grade cobalt-containing sulfur concentrates, which efficiently comprehensively recovers the valuable metal element cobalt associated with sulfide ore, and belongs to the technical field of microbial metallurgy. Background technique [0002] Cobalt is a strategic metal. It has the advantages of high melting point, good wear resistance, high strength, and good magnetism. It is an important raw material for the manufacture of various high-temperature alloys, magnetic materials, and anti-corrosion alloys. It is widely used in aviation, aerospace, electrical appliances, machinery manufacturing, chemistry, ceramics and other industries. my country is a country lacking cobalt resources, with only 39,000 tons of meaningful reserves and 59,800 tons of basic reserves. At present, my country's cobalt extracted from imported cobalt raw materials and waste accounts for about 65...

Claims

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Application Information

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