Desulfurizing recycle method for high sulfur medium-tail coal

Abstract

The invention discloses a desulfurization reusing method for the high sulfur middlings and tailings; firstly, the high sulfur middlings and tailings are crushed into particles with the granularity less than 3mm; then the crushed high sulfur middlings and tailings evenly flow into a jigger; the substances in the crushed high sulfur middlings and tailings are divided into layers according to the densities by the jigger; the sulfur concentrate is separated from the jigger; the sulfur content of the obtained sulfur concentrate is 32%-34.78%; the coal sludge is separated by a separation bed mounted on the jigger; then remained substances after the jigger and the separation bed are fed into a shaking table for separation to obtain the cleaned coal with the sulfur content less than 3%. The process of the desulfurization reusing method for the high sulfur middlings and tailings not only can realize the sulfur coal separation, but also can adopt the non-pollution mechanical method separation process to prevent the secondary environmental pollution; meanwhile, compared with the common flotation method desulfurization process, the reusing method which adopts the jigging, classification and shaking table processes has the advantages of simple process, less investment and rapid effect.

Description

technical field

[0001] The invention relates to a processing method of high-sulfur medium tailing coal, in particular to a method for desulfurization and reuse of high-sulfur medium tailing coal. Background technique

[0002] In recent years, with the improvement of environmental protection awareness, due to the high environmental pollution caused by the combustion of sulfur and other components in coal, many cities have issued corresponding regulations to limit the combustion of raw coal, so that raw coal must be washed when using raw coal. The waste product after raw coal washing is medium tailing coal, which contains about 28.46% carbon and 13.13% sulfur, so it is also called high-sulfur medium tailing coal. At present, my country's treatment of high-sulfur medium tailing coal is still in its infancy, and most of it is still in the waste pile, which not only occupies land for a long time, wastes resources, but also causes environmental pollution, affects agricultural prod...