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Desulfurizing recycle method for high sulfur medium-tail coal

A tailing coal and high-sulfur technology, applied in the direction of combustion method, block/powder fuel preparation, combustion equipment, etc., can solve the problems of flotation reagent pollution, complicated process, waste of resources, etc., to improve comprehensive utilization rate, process Simple, sulfur reduction effect

Inactive Publication Date: 2010-10-13
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment of high-sulfur medium-tailing coal in my country is still in its infancy, and most of them are still piled up as waste, which not only occupies land for a long time, wastes resources, but also causes environmental pollution, affects agricultural production, and endangers human health.
Most of the existing treatment methods are flotation methods, which use a large number of flotation agents to separate high-sulfur mid-tailing coal. This treatment method is not only complicated in process and high in cost, but also brings other aspects of pollution

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0013] Embodiment: first use a crusher to crush the high-sulfur medium tailing coal into particles with a particle size not greater than 3mm; Under the action of the liquid flow, they all move forward, upward, and downward, and at the same time they are layered according to density. Sulfur concentrate has the fastest sinking speed due to its high density, and sinks to the bottom of the bed first; light materials (clean coal, sundries) have low density, sink slowly, and are located in the upper layer of the bed. The density of coal slime is generally lower than that of clean coal. During the separation process, coal slime floats on the liquid surface or is in a semi-suspended state, so that the sulfur concentrate at the bottom can be directly separated by a jig. Sulfur concentrate contains 32% to 34.78% sulfur. A sorting bed with a cutting device is installed on the jig machine, and the floating or semi-floating slime can be separated by installing the sorting bed with a cutti...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23K1/00
Inventor 张覃代文治张杰唐云刘志红邱跃琴
Owner GUIZHOU UNIV
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