Dissociation and recleaning process for coking middlings

A dissociation and process technology, applied in the direction of solid separation, grain processing, etc., can solve the problem that the low ash part cannot be released and recycled, and achieve the effects of reducing energy consumption, large crushing ratio, and small amount of over-grinding

Active Publication Date: 2016-07-06
CHINA UNIV OF MINING & TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the medium coal with a finer particle size, the essential problem has not been solved, and the low ash part still cannot be further released and recovered. The sorting process is imminent

Method used

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  • Dissociation and recleaning process for coking middlings
  • Dissociation and recleaning process for coking middlings

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Embodiment Construction

[0014] The specific embodiment of the present invention is further described below in conjunction with accompanying drawing:

[0015] Such as figure 1 As shown, the dissociation and re-selection process of medium coal in coking comprises the use of a flotation machine to separate raw coal into clean coal, medium coal and gangue, which is characterized in that the steps are as follows:

[0016] a. Classify the medium coal with a diameter of 13mm, and separate the raw coal into lump medium coal with a diameter greater than 13mm and fine medium coal with a diameter less than 13mm;

[0017] b. The coal in the block is fed into the crushing system as a raw material for crushing to obtain finely crushed materials, and the finely crushed materials are fed into the spiral separator for sorting, and the part of the high ash tailing coal in the finely crushed materials is separated by the spiral separator; The hardness of medium coal is lower than that of gangue. Whether in the process...

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Abstract

The invention discloses a dissociation and recleaning process for coking middlings which are high in ash content and refractory, and belongs to coal washing methods. The coking middlings are divided into lump middlings (+13 mm) and slack middlings (with the granularity of -13 mm, and including coarse granules in floatation tailings) according to the granularity. The dissociation and recleaning process for the lump middlings involves a crushing system, a spiral tailing discarding system and a floatation system according to the characteristics of the lump middlings. The dissociation and recleaning process for the slack middlings involves a crushing system, a coarse slime dissociation and recleaning system, a grading system and a floatation system. Full coverage is realized for recycling of the coking middling resources at different granularity grades, clean coal in the middlings is recycled to the maximum extent, and the process is simple, reliable, small in investment and remarkable in economical benefit.

Description

technical field [0001] The invention relates to a dissociation and re-selection process of coking medium coal, and is especially suitable for the dissociation and re-selection process of coking medium coal used in coking in the decomposition of coking coal. Background technique [0002] The invention is based on the practical technology of dissociation and reselection of coal in coking, and the main purpose is to recover scarce coking coal resources. [0003] With the rapid development of my country's economy, the country's continuous increase in steel demand has led to a rapid increase in the demand for coking coal. my country is rich in coal resources, but the reserves of coking coal resources are less than 1 / 3 of the total reserves, and high-quality coking coal with good coking characteristics and low ash and sulfur content is even rarer. However, the average yield of coking medium coal produced by coking coal preparation plants in my country is more than 30% every year....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00B02C23/14B03B9/00
CPCB02C21/00B02C23/14B03B9/005
Inventor 桂夏辉曹亦俊邢耀文杨自立许雪红
Owner CHINA UNIV OF MINING & TECH
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