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Comprehensive utilization technology for reducing sulfur content of high-sulfur coal ash

A technology of sulfur coal ash and process, which is applied in the field of comprehensive utilization technology for reducing the sulfur content of high-sulfur coal ash, can solve the problems that it is difficult to meet the sulfur content requirements of coking coal blending and restrict the effective utilization of coking coal, and achieve strong innovation and low cost , the effect of reducing pollution

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. Restricting the Effective Utilization of Coking Coal

Method used

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  • Comprehensive utilization technology for reducing sulfur content of high-sulfur coal ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the comprehensive utilization process for reducing the sulfur content of high-sulfur coal ash in this embodiment includes the following steps:

[0033] Step 1. Feed the high-sulfur coal into the crusher for crushing to obtain crushed products; classify the crushed products to obtain coarsely crushed products and finely crushed products, and return the coarsely crushed products to the crusher again Carrying out crushing until the coarsely crushed product is broken into a finely crushed product, and the particle size of the finely crushed product is 2mm;

[0034] Step 2: Feed the finely crushed product obtained in step 1 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 the coarse ball mill product is returned to the Described ball mill carries out ball milling again, until the ball milling of coarse ball milling p...

Embodiment 2

[0043] Such as figure 1 As shown, the comprehensive utilization process for reducing the sulfur content of high-sulfur coal ash in this embodiment includes the following steps:

[0044] Step 1. Feed the high-sulfur coal into the crusher for crushing to obtain crushed products; classify the crushed products to obtain coarsely crushed products and finely crushed products, and return the coarsely crushed products to the crusher again Carrying out crushing until the coarsely crushed product is broken into a finely crushed product, and the particle size of the finely crushed product is 6mm;

[0045] Step 2: Feed the finely crushed product obtained in step 1 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 the coarse ball mill product is returned to the Described ball mill carries out ball milling again, until the ball milling of coarse ball milling p...

Embodiment 3

[0054] Such as figure 1 As shown, the comprehensive utilization process for reducing the sulfur content of high-sulfur coal ash in this embodiment includes the following steps:

[0055] Step 1. Feed the high-sulfur coal into the crusher for crushing to obtain crushed products; classify the crushed products to obtain coarsely crushed products and finely crushed products, and return the coarsely crushed products to the crusher again Carrying out crushing until the coarsely crushed product is broken into a finely crushed product, the particle size of the finely crushed product is 1mm;

[0056] Step 2: Feed the finely crushed product obtained in step 1 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 the coarse ball mill product is returned to the The ball mill is again ball milled until the coarse ball milled product is a fine ball milled product, ...

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Abstract

The invention discloses a comprehensive utilization technology for reducing sulfur content of high-sulfur coal ash. The technology comprises the following steps: 1, crushing high-sulfur coal to obtaina crushed product; 2, ball-milling the fine crushed product to obtain a ball-milled product; 3, mixing the fine ball milled product to obtain a mixed pulp product; 4, feeding the size mixing productinto a horizontal centrifugal concentrator for separation to obtain centrifugal clean coal and centrifugal tail coal; 5, feeding the centrifugal clean coal into an ore pulp preprocessor, adding an additive, and stirring to obtain centrifugal clean coal ore pulp; 6, introducing the centrifugal clean coal ore pulp into a flotation machine for flotation to obtain water-containing low-ash low-sulfur clean coal and flotation tail coal; and 7, correspondingly dehydrating the water-containing low-ash low-sulfur clean coal, the centrifugal tailings and the flotation tailings. According to the technology, the dissociation degree of sulfur in the coal is refined by crushing and grinding, and the dissociated coal sample is subjected to centrifugal separation and flotation combined separation, so thatthe sulfur content and ash content in the high-sulfur coal are reduced, the feasibility is provided for the utilization of the high-sulfur coal, and the environmental pollution of the high-sulfur coal in the utilization process is reduced.

Description

technical field [0001] The invention relates to the technical field of deashing and desulfurization of high-sulfur coal, in particular to a comprehensive utilization process for reducing the sulfur content of high-sulfur coal ash. Background technique [0002] Coal is the main energy source in our country, and the pollution caused by coal combustion is becoming more and more serious. Controlling environmental pollution, saving energy, and improving product quality have become the primary tasks of the coal preparation industry. Desulfurization and ash reduction of fine-grained coal is the basis for the preparation of high-quality clean coal and one of the main directions for the development of coal preparation. [0003] China produces nearly 10 million tons of high-sulfur coal (high-sulfur coal refers to coal with a sulfur content greater than 3%) produced in the process of coal mining. This part of high-sulfur coal produces a large amount of sulfur in the subsequent coking, ...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B9/00
CPCB03B7/00B03B9/005
Inventor 刘莉君于伟
Owner XIAN UNIV OF SCI & TECH
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