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Biological stirring leaching method of ordinary-temperature acidophilic leaching-ore bacteria and high-arsenic high-grade primary copper sulfide ore

A stirring leaching and sulfide copper ore technology, which is applied in the field of leaching bacteria and refractory copper ore, can solve the problems of inability to obtain economic benefits, long flotation process, and refractory copper ore, so as to improve the comprehensiveness of mineral resources. Utilization level, high leaching capacity, and the effect of reducing production costs

Inactive Publication Date: 2011-05-11
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

Low-grade copper mines have now been developed and utilized with relatively mature technologies, and have achieved significant economic benefits; however, refractory copper mines, especially primary copper mines with high arsenic content, have a long and complicated flotation process, and there are also High production costs, high energy consumption, serious environmental pollution and other problems make it impossible to obtain economic benefits by using existing traditional smelting processes

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  • Biological stirring leaching method of ordinary-temperature acidophilic leaching-ore bacteria and high-arsenic high-grade primary copper sulfide ore

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Embodiment Construction

[0019] like figure 1 As shown, under the perspective electron microscope, the leaching bacteria (Thiobacillus ferrooxidans DBS02 CCTCC NO: M2010323) is rod-shaped, with round ends of the cells and long flagella on the sides. The size of the bacteria is 2-2.1 μm × 0.5-0.6 μm.

[0020] In this embodiment, mining is carried out first, and the ore is copper ore with high arsenic content. After crushing and fine grinding process, the particle size is controlled at particle diameter<0.18mm, and the pulp concentration is adjusted to 15-25% (g / ml) with water. 1+1 sulfuric acid adjusts the pH value of the ore pulp to be stable at 1.8 to 2.4, takes the supernatant to obtain a leaching solution, adds ferrous ions and the obtained leaching solution to the culture tank of Thiobacillus ferrooxidans DBS02, and expands the culture of acidophilic leaching bacteria. The obtained bacterial liquid and the obtained pulp are pumped into the biological stirring leaching system for biological stirri...

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Abstract

The invention provides a biological stirring leaching method of ordinary-temperature acidophilic leaching-ore bacteria and high-arsenic high-grade primary copper sulfide ore. Ordinary-temperature acidophilic leaching-ore bacteria adopt thiobacillus ferrooxidans strain DBS02 which are preserved in China Center for Type Culture Collection, and the preserving number is CCTCC No. M2010323. The method comprises that ore is ground into 80 meshes and is added to a biological agitation leach system containing acidophilic leaching-ore bacteria to perform biological agitation leach, wherein the concentration of ore slurry is 15% to 25 % (g / ml); ferrous ion of 4 to 10 g / l is added; the PH value of the ore slurry is stabilized between 1.8 to 2.4 through the adjustment of dilute sulphuric acid; and the leaching rate of copper in the ore is up to more than 84% after 8 to 10 days of leaching. By adopting the invention, copper can be leached from high-arsenic high-grade primary copper sulfide ore without extra-fine grinding; and the invention has the advantages of high efficiency, energy conservation and environmental protection.

Description

technical field [0001] The invention relates to the technical field of leaching bacteria and refractory copper ore, in particular to a normal-temperature acidophilic leaching bacteria and a biological stirring and leaching method for high-arsenic and high-grade primary copper sulfide ore. Background technique [0002] High-grade, easy-to-float copper ores are gradually decreasing, while low-grade, difficult-to-smelt copper ores are receiving increasing attention. The traditional copper ore smelting process is through ore crushing, ore grinding, flotation, and pyrometallurgy for the concentrate obtained by flotation to obtain metallic copper. Low-grade copper mines have now been developed and utilized with relatively mature technologies, and have achieved significant economic benefits; however, refractory copper mines, especially primary copper mines with high arsenic content, have a long and complicated flotation process, and there are also Due to problems such as high prod...

Claims

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Application Information

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IPC IPC(8): C22B3/18C22B15/00
CPCY02P10/20
Inventor 柯林卢贯能陈来琳
Owner SOUTH CHINA UNIV OF TECH
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