A process for desulfurization by segmental bioheap leaching in high-sulfur coal mines

A technology of biological piles and coal mines, applied in the direction of microorganisms, microorganisms, biochemical equipment and methods, etc., can solve the problems of unrealized large-scale industrial application, and achieve the effect of expanding the scope of resource utilization, simple equipment, and high desulfurization efficiency

Active Publication Date: 2020-09-15
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

[0005] In recent years, great breakthroughs have been made in the research and development of coal mine biological desulfurization technology, but it is still in the laboratory research stage and has not yet achieved large-scale industrial application

Method used

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Embodiment 1

[0059] The coal ore used comes from a sulfur-containing coal mine in Inner Mongolia. The sulfur in the coal ore mainly exists in the form of pyrite, followed by organic sulfur, and the sulfur in the form of sulfate is less. The specific content is shown in Table 1.

[0060] Table 1 Sulfur content in coal mines

[0061] Total sulfur pyrite sulfur organic sulfur sulfate sulfur Content / wt% 3.18 2.33 0.78 0.28

[0062] The total sulfur in this coal mine is 3.18%, and the organic sulfur content is relatively high, reaching 0.78%, which belongs to the coal mine with high sulfur content and refractory coal mine.

[0063] Inorganic sulfur and organic sulfur oxidizing bacteria cultivated in the laboratory are scaled up and cultivated step by step, from 200mL to 1000m 3 Above, the bacterial concentration is 10 8 piece / m 3 above.

[0064] For the built coal mine heap, acidic water with a pH value of 1.5 is used for acid balance. The acid balance period i...

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Abstract

The invention provides a process for stage-by-stage biological dump leaching desulfurization of a high-sulfur-content coal mine. By stage-by-stage biological dump leaching removal of inorganic sulfur and organic sulfur, the process comprises the following steps: dump making, acid balancing, inorganic sulfur removal, neutralization of leachate and organic sulfur removal. The method can fulfill the aim of effectively removing sulfur from the high-sulfur-content coal mine. Compared with conventional physical and chemical methods, the method has the advantages of mild condition, low cost, zero discharge of harmful gas and the like, and has a wide application prospect in the field of coal mine desulfurization.

Description

technical field [0001] The invention relates to the technical field of biological hydrometallurgy, in particular to segmentally connecting inorganic sulfur and organic sulfur oxidizing bacteria and applying it to a high-sulfur coal mine biological heap leaching process to finally realize efficient removal of sulfur. Background technique [0002] Coal is the main energy source in our country, and the sulfur dioxide released from coal combustion seriously pollutes the environment. As coal is gradually mined deeper, the sulfur content will increase, especially the coal produced in North China will gradually become high-sulfur coal. The development of economical and effective desulfurization technology has become one of the most urgent tasks today, which is of great significance for improving the utilization efficiency of coal and improving the ecological environment. At present, there are physical methods, chemical methods, microbial desulfurization methods and microbial-flota...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/00C10L9/02
CPCC10L9/02
Inventor 武彪尚鹤莫晓兰温建康
Owner 有研资源环境技术研究院(北京)有限公司
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