Enrichment method of coal micromaceral

A micro-component and enrichment technology, applied in grain processing and other directions, can solve the problems of easily destroying the molecular structure of coal, toxicity, and easy oxidation, and achieve the effect of simple operation, good guidance, and not easy to be oxidized.

Active Publication Date: 2014-02-05
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the shortcoming of these methods is all to use heavy medium solvent, because adopting heavy medium solvent has following shortcoming:
[0006] 1) Specific gravity fluid should be used, and the specific gravity fluid with these characteristics has certain toxicity, which has a certain impact on the health of experimenters;
[0007] 2) When the coal sample is repeatedly pulverized and then floated and sunk with an organic solution, the coal sample is easy to destroy the molecular structure of the coal and change some properties of the coal;
[0008] 3) Coal samples wetted by solvent are not easy to preserve and easy to oxidize

Method used

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  • Enrichment method of coal micromaceral

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Effect test

Embodiment approach

[0025] According to a preferred embodiment of the present invention, the enrichment method includes the following steps: S1, crushing the coal sample in one stage and separating it in one stage to obtain inert enrichment components smaller than the first particle size and larger than the first particle size vitrinite-enriched components; S2, secondary pulverization and secondary separation of vitrinite-enriched components to further obtain inert-enriched components smaller than the second particle size and vitrinite-enriched components larger than the second particle size Components; and S3, collecting the inertinite-enriched components obtained in steps S1 and S2 to obtain inertinite-enriched coal, and collecting the vitrinite-enriched components obtained in step S2 to obtain vitrinite-enriched coal . Preferably, in step S1, the coal sample is pulverized to a particle size of 25 mm or less, and the primary separation is performed; and in step S2, the vitrinite-enriched compon...

Embodiment 1

[0033] 1) Weigh the Shendong coal sample (the microcomponent content is: 52.3% of inertite coal, 42.5% of vitrinite coal, and 0.8% of silky coal). The coal samples were first separated by hand to obtain vitrinite-enriched samples (microcomponent contents: vitrinite 77.5%, inertinite 22.1%, silk 0.4%) and inertinite-enriched samples ( The content of microscopic components is: vitrinite group 75.3%, inertin group 23.7%, silk group 1.0%).

[0034] 2) The hand-selected vitrinite-enriched samples were pulverized by a first-stage ultra-fine airflow to a particle size below 25 mm, then subjected to a first-stage cyclone separation, and sieved with a sieve with a first particle size x of 1 mm to obtain particles Inertinite-enriched coal A with a particle size of less than 1 mm and vitrinite-enriched coal B with a particle size of 1-25 mm. Similarly, the inertinite-enriched samples are sequentially crushed by a primary ultrafine airflow to a particle size below 25 mm, then subjected t...

Embodiment 2

[0038] The operation steps are the same as in Example 1, except that in step 2), a sieve with a first particle size x of 0.8 mm is used for sieving, and in step 3, a sieve with a second particle size y of 0.008 mm is used for sieving, and finally The obtained high-purity vitrinite-enriched coal and high-purity inertinite-enriched coal are obtained.

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Abstract

The invention discloses an enrichment method of coal micromaceral. The enrichment method comprises the following steps: a step of crushing and separating, namely, executing crushing and separating treatment for at least two times, crushing a coal sample in the first-time crushing and separating treatment process, and separating out an inert enrichment component of small particle diameter and a vitrinite enrichment component of large particle diameter according to the predetermined particle diameter, wherein the subsequent crushing and separating treatment process for each time is that the vitrinite enrichment component obtained through crushing and separating treatment for the previous time is crushed, and the inert enrichment component of small particle diameter and the vitrinite enrichment component of large particle diameter are separated out according to the predetermined particle diameter corresponding to the subsequent crushing and separating steps; and a step of enriching, namely, collecting the inert enrichment components obtained through crushing and separating treatment for each time to obtain inert enrichment coal, and collecting the vitrinite enrichment component obtained in the last-time crushing and separating treatment process to obtain vitrinite enrichment coal. According to the enrichment method disclosed by the invention, a heavy-medium solvent is not used, so that damage is avoided; the obtained enrichment coal is easy to store; in addition, even through the enrichment coal is ground to be below 200 meshes, the composition structures and the properties of the coal cannot be influenced.

Description

technical field [0001] The invention relates to the technical field of separation of coal microcomponents, in particular to a method for enriching coal microcomponents. Background technique [0002] Coal is mainly a non-renewable and precious fossil resource transformed from ancient plant remains in a complex geological environment over a long period of more than 70 million years. As an energy source, coal promoted the development of the first and second industrial revolutions and laid the foundation for the economic growth of modern society. Especially in my country, the role of coal in the national economy is more obvious. [0003] my country is relatively rich in coal resources, accounting for 13% of the world's total reserves, ranking second in the world, especially the coal reserves in western my country account for about 70% of the country's total reserves. At present, my country's coal is mainly used as fuel, but while coal burning provides heat and electricity, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C23/18B02C19/06
Inventor 蔺华林李克健章序文
Owner CHNA ENERGY INVESTMENT CORP LTD
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