CN109772571A - A kind of lump coal enters the coal jigging technique washed - Google Patents

A kind of lump coal enters the coal jigging technique washed Download PDF

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Publication number
CN109772571A
CN109772571A CN201910067585.1A CN201910067585A CN109772571A CN 109772571 A CN109772571 A CN 109772571A CN 201910067585 A CN201910067585 A CN 201910067585A CN 109772571 A CN109772571 A CN 109772571A
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China
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coal
jigging
washing
lump
particulate thing
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CN201910067585.1A
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CN109772571B (en
Inventor
张双全
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Publication of CN109772571B publication Critical patent/CN109772571B/en
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Abstract

The invention discloses a kind of lump coal to enter the coal jigging technique washed, it comprises the concrete steps that: after lump coal and particulate thing are mixed in a certain ratio, it is sent into the feed inlet of air pulsating jig, block cleaned coal, particulate thing, spoil and a small amount of coal slime are obtained after jigging washing, particulate thing is back to particulate thing storehouse again, it is re-mixed with lump coal, carries out circulation jigging washing, finally obtain product block cleaned coal.The present invention mixes lump coal with particulate thing, to meet the requirement that the washing of jigging method forms material size, in washing process, obtained particulate thing is separated again, and it is recycled back, mixed with new raw material lump coal, these particulate things recycle in systems always, raw material lump coal enters wash after obtained product be exactly block cleaned coal, spoil and minute quantity coal slime.Semi-coke will be made to be increased substantially with the economic benefit of coal jigging method coal preparation plant using this technique, and completely eliminate the coal slime problem that can cause environmental pollution.

Description

A kind of lump coal enters the coal jigging technique washed
Technical field
The present invention relates to coal jigging fields, and in particular to a kind of lump coal enters the coal jigging technique washed.
Background technique
Coal separation is the operation process for separating the minerals in raw coal with organic matter, separating.Common coal preparation method has weight Power coal separation method (including coal jigging method, heavy media coal separation method), coal floatation method, electric power coal separation method etc..Gravity coal washing at present It is first choice, wherein coal jigging method is industrially widely used.Its principle mainly utilizes upper up-flow and level stream to cooperate with Effect, material mainly in the variable velocity media stream of vertical ascent, are layered by density variation, and the effect of level stream and material exist Granularity and difference in shape, also have a certain impact to jigging process.Realize the equipment of jigging process jigging machine.
The power form of jigging machine driving water flow has compressed air and machine power.For the jigging machine that air is used as power, Other than vertical water flow plays a key effect, the fine grained in material also functions to important function for the separation of material.Just because of The important function of fine, aerodynamic jigging machine cannot be used for pure lump coal and enter the coal separation operation washed, it is necessary to have fine grained Presence.Must enter to wash with wholegrain grade here it is current coal jigging or 0.5mm or more grade enters to wash and cannot pure lump coal enter The main reason for washing.
In recent years, with the extensive industrialization of China's low-order coal production semi-coke technology, for the lump coal demand of low ash It increased dramatically, the lump coal without washing is often due to the excessively high semi-coke that cannot produce high-quality of ash content.But block in usual raw coal Coal ratio is lower, and often more than half is Bed for Fine Coal, and when using the coal washing of jigging method, entering must be by lump coal and Bed for Fine Coal one when washing It rising to enter to wash the product that can be just needed, the low ash lump coal to come out is produced for semi-coke, and the Bed for Fine Coal of low ash is sold to power plant, though Right calorific value increases, but moisture also increases substantially, for power plant with use raw coal difference little, low ash Bed for Fine Coal Utility value is not significantly increased, and therefore, the Bed for Fine Coal of these low ashes and the price of raw coal are similar, but when Coal cleaning by jigging Also the coal slime of a large amount of reluctant high ash Gao Shui is produced.Coal slime mostlys come from Bed for Fine Coal, if Bed for Fine Coal screened out Come, washing lump coal, coal slime, which is difficult to the problem of disposing, thoroughly to be solved.
Summary of the invention
The object of the present invention is to provide a kind of lump coal to enter the coal jigging technique washed, and only generates a small amount of coal slime.
To achieve the above object, The technical solution adopted by the invention is as follows: a kind of lump coal enters the coal jigging technique washed, tool Body step is: after raw material lump coal and particulate thing are mixed in a certain ratio, the feed inlet of air pulsating jig is sent into, through jigging Block cleaned coal, particulate thing, spoil and a small amount of coal slime are obtained after washing, then particulate thing is back to particulate thing storehouse, it is mixed with raw material lump coal It closes, carries out circulation jigging washing, finally obtain product block cleaned coal.
Preferably, the grade of the particulate thing is 0-13mm or 0-10mm.
Preferably, the particulate thing is one of fine cleaned coal, semi-coke end, coke fines or a variety of.
Preferably, the fine cleaned coal after the screening of wholegrain grade raw coal, jigging washing by obtaining.
The present invention mixes lump coal with particulate thing, to meet the requirement that the washing of jigging method is distributed material size, is washing During choosing, obtained particulate thing is separated again, is recycled back, and mixes with new raw material lump coal.In this way, being achieved that Lump coal enters the target washed, these particulate things recycle in systems always, not as product, therefore, lump coal enters wash after obtained production Product are mainly block cleaned coal, spoil and minute quantity coal slime.These minute quantity coal slimes can be blended into Bed for Fine Coal for power plants generating electricity, Thus thoroughly solve the problems, such as the disposition of coal preparation plant's coal slime, on the one hand, the block cleaned coal product needed, it is on the other hand again several Coal slime is not generated, and screens out the particulate moisture content of coal come and does not increase, is very suitable for the users such as power plant use.Using this Technique will be such that semi-coke is increased considerably with the economic benefit of coal jigging method coal preparation plant, and thorough solve can cause environmental pollution Coal slime handling problems.
Detailed description of the invention
Fig. 1 is the process flow chart of the embodiment of the present invention 1;
Fig. 2 is the process flow chart of the embodiment of the present invention 2;
Fig. 3 is the process flow chart of the embodiment of the present invention 3;
Fig. 4 is the process flow chart of the embodiment of the present invention 4.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
As shown in Figure 1, first a certain amount of ungarbled raw coal feeding washing systems comprising wholegrain grade are carried out traditional Coal washing operation obtains fine cleaned coal after washing, the fine cleaned coal quantity enough, be able to satisfy air pulsating jig operate normally In the case where, stop raw coal pan feeding;
After raw coal is crushed, screening operation is carried out by the classifying screen of 13mm or 10mm, is obtained under oversize lump coal and sieve Object Bed for Fine Coal, Bed for Fine Coal are distributed directly to user as final products, and lump coal waits for washing;
The fine cleaned coal that lump coal comes with washing systems conveying of not washing that process conveying comes will be sieved to be mixed in a certain ratio It is even, it is sent into the feed inlet of air pulsating jig, block cleaned coal, spoil, fine cleaned coal and minute quantity coal are obtained after jigging washing The products such as mud, minute quantity coal slime can be blended into the Bed for Fine Coal for screening out and and sell, fine cleaned coal return system and screener What sequence conveying came does not wash the uniformly mixed feeding air pulsating jig of lump coal, carries out circulation jigging washing, the block essence that washing obtains Coal is produced for semi-coke.
Embodiment 2
As shown in Fig. 2, first a certain amount of ungarbled raw coal feeding washing systems comprising wholegrain grade are carried out traditional Coal washing operation obtains fine cleaned coal after washing, the fine cleaned coal quantity enough, be able to satisfy air pulsating jig operate normally In the case where, stop raw coal pan feeding;
The fine cleaned coal that the raw material lump coal of buying and washing systems loop back is mixed in a certain ratio uniformly, is sent into empty The feed inlet of gas pulsator jig obtains block cleaned coal, spoil, fine cleaned coal and four kinds of minute quantity coal slime productions after jigging washing Product, fine cleaned coal return system are mixed with raw material lump coal, carry out circulation jigging washing, and the block cleaned coal that washing obtains is raw for semi-coke It produces.
Embodiment 3
As shown in figure 3, the raw material lump coal of buying and semi-coke last (grade 0-13mm) are mixed in a certain ratio uniformly, send The feed inlet for entering air pulsating jig obtains block cleaned coal, spoil, semi-coke end and minute quantity coal slime etc. after jigging washing and produces Product, semi-coke end return system are mixed with raw material lump coal, carry out circulation jigging washing, and the block cleaned coal that washing obtains is raw for semi-coke It produces.
Embodiment 4
As shown in figure 4, the raw material lump coal of buying and coke fines (grade 0-10mm) are mixed in a certain ratio uniformly, send The feed inlet for entering air pulsating jig obtains the production such as block cleaned coal, spoil, coke fines and minute quantity coal slime after jigging washing Product, coke fines return system are mixed with raw material lump coal, carry out circulation jigging washing, and the block cleaned coal that washing obtains is raw for semi-coke It produces.
Jigging washing described in above embodiments is the jigging washing process of this field routine.

Claims (4)

1. a kind of lump coal enters the coal jigging technique washed, which is characterized in that comprise the concrete steps that: by raw material lump coal and particulate thing by one Certainty ratio mixing after, be sent into the feed inlet of air pulsating jig, obtained after jigging washing block cleaned coal, particulate thing, spoil and A small amount of coal slime, then particulate thing is back to particulate thing storehouse, it is mixed with raw material lump coal, carries out circulation jigging washing, finally obtain production Product block cleaned coal.
2. a kind of lump coal according to claim 1 enters the coal jigging technique washed, which is characterized in that the particulate thing Grade is 0-13mm or 0-10mm.
3. a kind of lump coal according to claim 1 or 2 enters the coal jigging technique washed, which is characterized in that the particulate Object is one of fine cleaned coal, semi-coke end, coke fines or a variety of.
4. a kind of lump coal according to claim 3 enters the coal jigging technique washed, which is characterized in that the fine cleaned coal By being obtained after the screening of wholegrain grade raw coal, jigging washing.
CN201910067585.1A 2019-01-24 2019-01-24 Jigging coal separation process for washing lump coal Expired - Fee Related CN109772571B (en)

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CN109772571B CN109772571B (en) 2020-03-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112871440A (en) * 2021-01-12 2021-06-01 黑龙江龙煤双鸭山矿业有限责任公司 Fusion process of coking coal preparation plant and power coal preparation plant

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CN101185912A (en) * 2007-12-12 2008-05-28 唐山易通科技开发有限公司 Torbanite washbox, coal separation system and coal separation method thereof
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CN102319619A (en) * 2011-09-13 2012-01-18 山东新矿赵官能源有限责任公司 Graded washing process for raw coal
CN102553708A (en) * 2012-01-19 2012-07-11 中国矿业大学 Process for washing and selecting high-ash, high-water easily-argillized lignite
CN103623918A (en) * 2013-12-10 2014-03-12 煤炭工业济南设计研究院有限公司 Steam coal washing processing method for easy-to-argillization gangues
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112871440A (en) * 2021-01-12 2021-06-01 黑龙江龙煤双鸭山矿业有限责任公司 Fusion process of coking coal preparation plant and power coal preparation plant

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