CN102059174B - A kind of cleaned coal dehydration and realize this technique equipment combination - Google Patents
A kind of cleaned coal dehydration and realize this technique equipment combination Download PDFInfo
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- CN102059174B CN102059174B CN201010612504.0A CN201010612504A CN102059174B CN 102059174 B CN102059174 B CN 102059174B CN 201010612504 A CN201010612504 A CN 201010612504A CN 102059174 B CN102059174 B CN 102059174B
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Abstract
The present invention relates to a kind of coal preparation technique, particularly a kind of floatation clean coal dewatering process, relate to a set of equipment combination realizing this technique simultaneously.The feature of dewatering process is floatation clean coal gravity flow or squeezes into Sedimentation centrifugel dehydration with pump, and the floatation clean coal after dehydration is directly as final products, and centrifugate and the filtered fluid of Sedimentation centrifugel turn back to floatation feed, namely again enter flotation operation.The feature of equipment assembled scheme does not have filter press, secondary flotation machine, and Sedimentation centrifugel is as unique floatation clean coal dehydration equipment.The present invention greatly can save construction costs, reduces maintenance cost and production cost.Can not only ensure that the moisture content index of floatation clean coal product is qualified, also ensure that the uniformity of the grey quality index of grading of floatation clean coal product simultaneously.
Description
Technical field
The present invention relates to a kind of coal preparation technique, particularly a kind of floatation clean coal dewatering process, relate to a set of equipment combination realizing this technique simultaneously.
Technical background
The moisture of cleaned coal is an important indicator of head coal product quality, and the selected of coal slime is generally all pass through floatation process at present, inevitably bring Coal ' moisture content to increase, thus need to carry out dewatering process to reduce the moisture of head coal product to reach quality index.
Generally adopt following two kinds of floatation clean coal dewatering process both at home and abroad: the first, filter press dewatering process.Comprise various filter press, equipment is different, and technique is identical; This system process is simple, it is less to invest, and production cost is lower, but the moisture that there is head coal product is higher, and product percent of pass is unstable, and can not mix with other head coal products because of filter press filter cake caking and cause entire block quality uneven.The second, filter dewatering process.Comprise vacuum filter and pressing filter, equipment is different, and technique is identical.Adopt the system of vacuum filter to there is the defect that investment is high, production cost is high, the moisture of head coal product is high, seldom adopt at present.Adopt the system of pressing filter to be applied within the specific limits at present, its advantage is that process system is simple, head coal product moisture is lower, and shortcoming is that investment is large, production cost is high, is difficult to be used widely.
From 2003, the third floatation clean coal dewatering process---Horizontal sedimentation perforated basket centrifuge (hereinafter referred to as Sedimentation centrifugel) and filter press combined dehydration technique were applied.Concrete dehydration process is: floatation clean coal flows automatically or squeezes into Sedimentation centrifugel dehydration with pump, and the floatation clean coal after dehydration is directly as final products.And the centrifugate of Sedimentation centrifugel and filtered fluid squeeze into filter press dehydration with pump again, filter press filter cake is as final products, and it is multiplexing that the filtrate of filter press enters coal preparation plant's circulation.This is the dewatering process that grew up in recent years, its advantage be head coal product moisture low, invest less, production cost is lower, but there is certain defect: process system more complicated, still there is the phenomenon of a small amount of filter press filter cake caking.More more seriously: cleaned coal (coarse fraction) ash content that Sedimentation centrifugel is discharged is lower, filter cake (fine fraction) ash content that filter press is discharged is higher, be all floatation clean coal, it is poor that both create larger ash content, and filter cake caking can not mix with other head coal product, by having a strong impact on the product quality of the final comprehensive cleaned coal of coal preparation plant, refer to accompanying drawing one.
Can not mix with other head coal product for solving filter cake caking and cause the problem of head coal product " ash content is poor ", coal preparation technique is generally taked two kinds of measures: one is dewatered without Sedimentation centrifugel by a part of floatation clean coal, and directly reinstate filter press with the centrifugate of Sedimentation centrifugel and filtered fluid one and dewater, be i.e. Sedimentation centrifugel and filter press almost " side by side " use.This measure considerably reduces floatation clean coal product " ash content is poor ", but adds the moisture of final head coal product because of the treating capacity increasing filter press; Two is set up secondary flotation, that is, the centrifugate of Sedimentation centrifugel and filtered fluid enter secondary flotation operation, and the floatation clean coal of secondary flotation enters filter press dehydration, and the flotation tailing of secondary flotation drains into tail coal mud system, refers to accompanying drawing two.This measure essentially eliminates " ash content is poor " of floatation clean coal product, but causes process system complicated simultaneously, and investment strengthens, and clean coal yield reduces.
Summary of the invention
The object of this invention is to provide one can not only to greatest extent simplification of flowsheet, save equipment investment, reduce production cost, can also ensure moisture and the ash content quality of head coal product, and the equipment that can make floatation clean coal and the mixed uniformly technological process of other cleaned coal and realize this flow process combines.
For this reason, process program provided by the invention is: floatation clean coal flows automatically or squeezes into Sedimentation centrifugel dehydration with pump, floatation clean coal after dehydration is directly as final products, and centrifugate and the filtered fluid of Sedimentation centrifugel turn back to floatation feed, namely again enter flotation operation.Particularly, roughly select coal slime after sieve bend 1 classification after Pre-sorting, the lower fine coal slurry of sieve enters flotation device 3 and carries out flotation operation; Coarse grain cleaned coal mud on sieve enters Sedimentation centrifugel 5 and carries out dewatering operation together with the cleaned coal after flotation; The centrifugate that aforementioned Sedimentation centrifugel 5 dewatering operation obtains and filtered fluid again return and enter flotation operation; Circulate according to this.
Equipment assembled scheme provided by the invention is: equipment needed thereby comprises sieve bend 1, flotation device 3, Sedimentation centrifugel 5; Do not comprise filter press 8, pressing filter, vacuum filter, secondary flotation machine 9.Sedimentation centrifugel 5 is as unique floatation clean coal dehydration equipment.The coarse slime discharging opening of sieve bend 1 is connected with the charging aperture of Sedimentation centrifugel 5, and the fine coal slurry discharging opening of sieve bend 1 is connected with the charging aperture of flotation device 3; The cleaned coal mud discharging opening of flotation device 3 is connected with the charging aperture of Sedimentation centrifugel 5; Centrifugate, the filtered fluid discharging opening of Sedimentation centrifugel 5 are connected with the charging aperture of flotation device 3.
The present invention compared with prior art tool has the following advantages:
1, abandon the equipment such as filter press, pressing filter, vacuum filter, secondary flotation machine, obviously greatly can save construction costs, reduce maintenance cost and production cost.
2, the centrifugate of Sedimentation centrifugel and filtered fluid are turned back to flotation operation, greatly simplifie floatation clean coal dewatering process, enable floatation clean coal to greatest extent with other cleaned coal Homogeneous phase mixing, desirable unexpected technique effect, can not only ensure that the moisture content index of floatation clean coal product is qualified, also ensure that the uniformity of the grey quality index of grading of floatation clean coal product simultaneously.
Accompanying drawing explanation
Fig. 1 is Sedimentation centrifugel of the prior art and filter press combined dehydration process chart.
Fig. 2 is Sedimentation centrifugel of the prior art and filter press combined dehydration modified (adding secondary flotation) process chart.
Fig. 3 is present invention process flow chart and equipment combination schematic diagram.
Wherein: sieve bend 1, floatation feed bucket 2, flotation device 3, flotation concentrate bucket 4, Sedimentation centrifugel 5, pump 6, filter press enters charging basket 7, filter press 8, secondary flotation machine 9, and secondary flotation enters charging basket 10.
Detailed description of the invention
In prior art, the centrifugate of Sedimentation centrifugel and filtered fluid must squeeze into filter press dehydration with pump, or select cleaned coal through secondary flotation operation and squeeze into filter press dehydration with pump again.Only need remove filter press and secondary flotation machine two kinds of equipment when using instead of the present invention, the centrifugate of Sedimentation centrifugel and filtered fluid are turned back to original flotation operation.Cleaned coal in centrifugate and filtered fluid enters Sedimentation centrifugel dehydration again after being selected by flotation operation, the most water in centrifugate and filtered fluid and a small amount of dirty coal mud are then disposed to tail coal mud system by flotation device.
In the middle of coal preparation plant's actual production process, cleaned coal mud is roughly selected after dense medium coal cleaning process (or other coal preparation technique) Pre-sorting, again through cleaned coal mud sieve bend (or miscellaneous equipment) classification process, cleaned coal mud sieve bend screenings (fine coal slurry) enters flotation operation, cleaned coal mud sieve bend oversize (coarse grain cleaned coal mud) is qualified head coal product, usually Sedimentation centrifugel dehydration is entered together with floatation clean coal, to improve the dehydrating effect of floatation clean coal further.
As applicant's design " 2,400,000 tons/year of coal preparation plants of the precious Coal Chemical Industry limited company of ACE Semi of Qitaihe ", it is a large-scale user type coal preparation plant, the cleaned coal that coal preparation plant produces mainly does coking feed coal for coke-oven plant of the said firm, and the cleaned coal that coal preparation plant produces directly sends into coke-oven plant's raw material cabin by rubber conveyer.Coal preparation plant's floatation clean coal dewatering system devises the technique as shown in accompanying drawing one, adopts 2 XJM-S20-5 type agitation impeller flotators, 3 LCG1200 × 1800 type Sedimentation centrifugels, 2 XMGZ400/1500-U type filter presses.This factory puts into serial production in May, 2009, and the cleans ash that flotation device is selected is generally about 9%.The operation initial stage, the product moisture that one section (Sedimentation centrifugel) dewaters is 16%-17%, ash content 8%-9%, the product moisture that two sections (filter press) dewaters is 29%-30%, ash content is up to 15%-16%, and the high ash content of filter press filter cake drastically influence the quality of head coal product and the quality of institute's coking charcoal.
Agree to through Bao Qinlong company, applicant carries out dewatering process experiment of the present invention in the said firm, inactive filter press, and transfer pipeline is reconfigured according to equipment combination of the present invention, after tested, the indices of floatation clean coal product is normal, stable, and floatation clean coal moisture is 16%-17%, ash content 8%-9%.
Claims (2)
1. a cleaned coal dehydration, is characterized in that: roughly select coal slime after sieve bend (1) classification after Pre-sorting, and the lower fine coal slurry of sieve enters flotation device (3) and carries out flotation operation; Coarse grain cleaned coal mud on sieve enters Sedimentation centrifugel (5) and carries out dewatering operation together with the cleaned coal after flotation; The centrifugate that aforementioned Sedimentation centrifugel (5) dewatering operation obtains and filtered fluid again return and enter flotation operation; Circulate according to this.
2. realize the equipment combination of a kind of cleaned coal dehydration described in claim 1, comprise sieve bend (1), flotation device (3), Sedimentation centrifugel (5), it is characterized in that: the coarse slime discharging opening of sieve bend (1) is connected with the charging aperture of Sedimentation centrifugel (5), the fine coal slurry discharging opening of sieve bend (1) is connected with the charging aperture of flotation device (3); The cleaned coal mud discharging opening of flotation device (3) is connected with the charging aperture of Sedimentation centrifugel (5); Centrifugate, the filtered fluid discharging opening of Sedimentation centrifugel (5) are connected with the charging aperture of flotation device (3).
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| CN201010612504.0A CN102059174B (en) | 2010-12-19 | 2010-12-19 | A kind of cleaned coal dehydration and realize this technique equipment combination |
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| CN201010612504.0A CN102059174B (en) | 2010-12-19 | 2010-12-19 | A kind of cleaned coal dehydration and realize this technique equipment combination |
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| CN102059174B true CN102059174B (en) | 2016-01-20 |
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| CN102553703B (en) * | 2012-01-12 | 2013-08-21 | 中国矿业大学 | Coal slime treatment process for deslimed dense-medium coal separation |
| CN114713363B (en) * | 2021-10-19 | 2023-03-24 | 中国矿业大学 | Separation and recovery system and process for non-slime-formation fine-particle coal |
| CN114643194A (en) * | 2022-03-21 | 2022-06-21 | 河南天元煤业有限公司 | Method for treating flotation concentrate by adopting fine screen |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1542620A1 (en) * | 1987-02-03 | 1990-02-15 | Производственное Объединение По Добыче Угля Гидравлическим Способом "Гидроуголь" | Method of processing coal |
| RU2079372C1 (en) * | 1994-05-18 | 1997-05-20 | Институт проблем комплексного освоения недр РАН | Method of preparing coal for fuel suspension |
| RU2005114190A (en) * | 2005-05-11 | 2006-11-20 | Институт угл и углехимии Сибирского отделени Российской академии наук (ИУУ СО РАН) (RU) | METHOD FOR COAL Sludge Enrichment |
| CN1883812A (en) * | 2006-07-08 | 2006-12-27 | 枣庄矿业(集团)有限责任公司 | Raw coal sorting process |
| CN101530824A (en) * | 2009-04-14 | 2009-09-16 | 金易通科技（北京）有限公司 | A coal dressing method and system of four-product jigging primary cleaning, secondary head coal small simplified heavy medium reelecting |
| CN101602029A (en) * | 2009-06-27 | 2009-12-16 | 勃利县森清能源开发有限公司 | From raw coal and select the technology of cleaned coal in the locked middlings of coal |
| CN101797532A (en) * | 2010-04-07 | 2010-08-11 | 黑龙江科技学院 | Coal separating process of crude coal slime hydroseparation |
-
2010
- 2010-12-19 CN CN201010612504.0A patent/CN102059174B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1542620A1 (en) * | 1987-02-03 | 1990-02-15 | Производственное Объединение По Добыче Угля Гидравлическим Способом "Гидроуголь" | Method of processing coal |
| RU2079372C1 (en) * | 1994-05-18 | 1997-05-20 | Институт проблем комплексного освоения недр РАН | Method of preparing coal for fuel suspension |
| RU2005114190A (en) * | 2005-05-11 | 2006-11-20 | Институт угл и углехимии Сибирского отделени Российской академии наук (ИУУ СО РАН) (RU) | METHOD FOR COAL Sludge Enrichment |
| CN1883812A (en) * | 2006-07-08 | 2006-12-27 | 枣庄矿业(集团)有限责任公司 | Raw coal sorting process |
| CN101530824A (en) * | 2009-04-14 | 2009-09-16 | 金易通科技（北京）有限公司 | A coal dressing method and system of four-product jigging primary cleaning, secondary head coal small simplified heavy medium reelecting |
| CN101602029A (en) * | 2009-06-27 | 2009-12-16 | 勃利县森清能源开发有限公司 | From raw coal and select the technology of cleaned coal in the locked middlings of coal |
| CN101797532A (en) * | 2010-04-07 | 2010-08-11 | 黑龙江科技学院 | Coal separating process of crude coal slime hydroseparation |
Non-Patent Citations (2)
| Title |
|---|
| 平煤八矿选煤厂粗煤泥***的改造;王俊旺等;《煤炭加工与综合利用》;20100430(第2期);第21页右栏第3段，图2 * |
| 沉降过滤式离心脱水机在东山煤矿洗煤厂的应用;杨慧丽;《露天采矿技术》;20100430(第2期);第44页左栏倒数第2段-右栏第1段，图2 * |
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