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
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[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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