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Separation technology reducing sulfur content and ash content in coal

A process and technology of sulfur content, applied in the field of separation process for reducing sulfur and ash content in coal, can solve problems such as the decline of clean coal yield, low desulfurization selectivity, and restrictions on the effective use of coking coal, so as to reduce environmental pollution, The effect of improving resource utilization rate

Active Publication Date: 2019-12-13
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although physical separation methods and conventional flotation methods can reduce the sulfur and ash content in coal, the total sulfur content of clean coal after separation of most high-sulfur coals is still around 2.0%, which is difficult to meet the sulfur content requirements of coking coal blending. Seriously restrict the effective utilization of coking coal
For fine-grained high-sulfur coal slime, conventional flotation has the disadvantage of low desulfurization selectivity, and the desulfurization effect in existing production is not ideal, and the clean coal yield will drop sharply after multiple selections

Method used

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  • Separation technology reducing sulfur content and ash content in coal

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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, the present embodiment reduces the separation process of sulfur and ash in coal and comprises the following steps:

[0035] Step 1, feeding the high-sulfur coal into the jig machine for jigging separation to obtain jigging clean coal and jigging tailing coal;

[0036] Step 2. Feed the clean jigging coal obtained in step 1 into the crusher for crushing to obtain crushed products; after the crushed products are graded, coarse crushed products and fine crushed products are obtained, and the coarse crushed products are returned to until the crusher is crushed again until the coarsely crushed product is broken into a finely crushed product, and the particle size of the finely crushed product is 3mm;

[0037] Step 3: Feed the finely crushed product obtained in step 2 into a ball mill for ball milling to obtain a ball mill product; after the ball mill product is classified, a coarse ball mill product and a fine ball mill product are obtained, and th...

Embodiment 2

[0045] Such as figure 1 As shown, the present embodiment reduces the separation process of sulfur and ash in coal and comprises the following steps:

[0046] Step 1, feeding the high-sulfur coal into the jig machine for jigging separation to obtain jigging clean coal and jigging tailing coal;

[0047] Step 2. Feed the clean jigging coal obtained in step 1 into the crusher for crushing to obtain crushed products; after the crushed products are graded, coarse crushed products and fine crushed products are obtained, and the coarse crushed products are returned to until the crusher is crushed again until the coarsely crushed product is broken into a finely crushed product, and the particle size of the finely crushed product is 5 mm;

[0048] Step 3: Feed the finely crushed product obtained in step 2 into a ball mill for ball milling to obtain a ball mill product; after the ball mill product is classified, a coarse ball mill product and a fine ball mill product are obtained, and t...

Embodiment 3

[0056] Such as figure 1 As shown, the present embodiment reduces the separation process of sulfur and ash in coal and comprises the following steps:

[0057] Step 1, feeding the high-sulfur coal into the jig machine for jigging separation to obtain jigging clean coal and jigging tailing coal;

[0058] Step 2. Feed the clean jigging coal obtained in step 1 into the crusher for crushing to obtain crushed products; after the crushed products are graded, coarse crushed products and fine crushed products are obtained, and the coarse crushed products are returned to until the crusher is crushed again until the coarsely crushed product is broken into a finely crushed product, and the particle size of the finely crushed product is 2 mm;

[0059] Step 3: Feed the finely crushed product obtained in step 2 into a ball mill for ball milling to obtain a ball mill product; after the ball mill product is classified, a coarse ball mill product and a fine ball mill product are obtained, and t...

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Abstract

The invention discloses a separation technology reducing the sulfur content and the ash content in coal. The separation technology includes the following steps that firstly, the high-sulfur coal is fed into a jigger to be subjected to jigging separation, and jigging cleaned coal is obtained; secondly, the jigging cleaned coal is fed into a breaking machine to be broken, and a broken product is obtained; thirdly, the fine broken product is fed into a ball grinding machine to be subjected to ball grinding, and a ball grinding product is obtained; fourthly, the fine ball grinding product is led into a pulp preprocessor, a chemical agent and water are added, stirring is conducted, and then fine ball grinding product pulp is obtained; fifthly, the fine ball grinding product pulp is led into a floating machine to be subjected to floatation, and floatation cleaned coal and floatation tailings are obtained; sixthly, the floatation cleaned coal is fed into a defoaming barrel to be stirred, anddefoaming cleaned coal is obtained; seventhly, the defoaming cleaned coal is fed into a centrifugal separation machine to be subjected to centrifugal separation, and water-containing low-ash low-sulfur cleaned coal and centrifugal tailings are obtained; and eighthly, the water-containing low-ash low-sulfur cleaned coal and the tailings are subjected to dehydration treatment respectively. By meansof the separation technology, the sulfur content and the ash content in the high-sulfur coal can be reduced, the sulfur and ash removing efficiency is high, and the technological process is simple.

Description

technical field [0001] The invention relates to the technical field of coal desulfurization and deashing, in particular to a sorting process for reducing sulfur and ash in coal. Background technique [0002] At this stage, the most important energy resource in my country is still coal, and for a long time, it will still not change the strong energy status of coal. About 1 / 3 of my country's coal content is high-sulfur coal, and about 1 / 6 of the current coal mining volume is high-sulfur coal. Reducing the sulfur content in coal can not only effectively reduce the emission of sulfur dioxide in the process of coal combustion and reduce its pollution to the atmosphere, but also has great significance for the rational allocation of coal resources, especially the rational utilization of coking coal resources. Therefore, it is necessary to develop clean utilization of desulfurization of high-sulfur coal. [0003] The form of sulfur in most high-sulfur coals in China is mainly pyri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03B9/00
CPCB03B7/00B03B9/005
Inventor 于伟刘莉君
Owner XIAN UNIV OF SCI & TECH
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