Process for using specific desulphurization mixed bacterium for high sulfur coal mine biological desulfurization

Abstract

A process for using specific desulphurization mixed bacterium for high sulfur coal mine biological desulfurization is as follows: ore is crushed to-25mm for heap construction, the heap height is 8-10m, temperature and gas composition induction devices are embedded during heap construction; then spray operation is performed, the spraying intensity is 10-15L / (M<2>.H), the spray solution contains 107-108cfu / mL of specific desulphurization mixed bacterium CGMCC NO.8336, the oxidation reduction potential of the spray solution is more than 700mV (SCE), the spray operation is performed according to the mode of spraying for 7 days and resting for 5 days or spraying for 7 days and resting for 7 days, the in-heap temperature is controlled at 45 to 60 DEG C, and the leaching system pH value is 1.5 to 1.8. The process has the advantages of short process, simple equipment, small investment, low cost, no pollution, larger or smaller production scale, and capability of processing high sulfur coal mine resources which cannot be processed by traditional mineral processing and metallurgical technology, and can expand the resource utilization scope and improve the comprehensive recovery level of the coal mine resources.

Description

Technical field [0001] The invention relates to a process for removing sulfur in high-sulfur coal mines by using microorganisms, in particular to a process for biological desulfurization of high-sulfur coal mines by using an exclusive desulfurization mixed bacteria. Background technique [0002] Coal is the main energy source in our country, and the sulfur dioxide released by the combustion of coal seriously pollutes the environment. The average sulfur content of coal in my country is about 1.61wt%, and the sulfur content spans a wide range, from ultra-low sulfur coal with a sulfur content of 0.04wt% to high-sulfur coal with 9.62wt%. Coal in the north has low sulfur content. Medium and high sulfur coals with sulfur content greater than 2.0wt% are mostly distributed in the south and southwest. The sulfur content of deep coal seams in the same area is higher than that of shallow coal seams. As far as my country's high-sulfur coal is concerned, most areas of coal are mainly compose...

AI Technical Summary

Problems solved by technology

The physical method can only remove inorganic sulfur in coal, and the removal rate is not high; the chemical method has certain damage to the structural properties of coal and the cost is high; the microbial-flotation method uses microorganisms to modify the surface of pyrite , to separate coal from pyrite by flotation, which can only remove pyrite sulfur

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