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A comprehensive utilization process for reducing sulfur content in 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 of restricting the effective utilization of coking coal and difficulty in meeting the sulfur content requirements of coking coal blending, and achieves strong innovation and low cost , high efficiency effect

Active Publication Date: 2021-06-04
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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  • A comprehensive utilization process for reducing sulfur content in high-sulfur coal ash

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Experimental program
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Effect test

Embodiment 1

[0032] like 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 prod...

Embodiment 2

[0043] like 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 prod...

Embodiment 3

[0054] like 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, and...

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Abstract

The invention discloses a comprehensive utilization process for reducing the sulfur content of high-sulfur coal ash, which comprises the following steps: 1. crushing high-sulfur coal to obtain crushed products; 2. ball-milling the finely crushed products to obtain ball-milled products; Slurry mixing to obtain pulping products; 4. Put the slurrying products into the horizontal centrifugal concentrator for separation to obtain centrifugal clean coal and centrifugal tailings; 5. Feed the centrifugal clean coal into the pulp preprocessor and add additives Stir after the reagent to obtain the centrifugal clean coal slurry; 6. Introduce the centrifugal clean coal slurry into the flotation machine for flotation to obtain water-containing low-ash low-sulfur clean coal and flotation tailings; 7. For water-containing low-ash low-sulfur clean coal , centrifuge tailings and flotation tailings are dehydrated separately. The invention uses crushing and grinding to refine the dissociation degree of sulfur in coal, and performs centrifugal separation and flotation combined separation on the dissociated coal samples to reduce the sulfur and ash content in high-sulfur coal and provide high-sulfur coal utilization. Feasibility, reducing environmental pollution during the utilization of high-sulfur coal.

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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Patent Type & Authority Patents(China)
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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