CN112371324A - Efficient coarse slime separation process - Google Patents
Efficient coarse slime separation process Download PDFInfo
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- CN112371324A CN112371324A CN202010991367.XA CN202010991367A CN112371324A CN 112371324 A CN112371324 A CN 112371324A CN 202010991367 A CN202010991367 A CN 202010991367A CN 112371324 A CN112371324 A CN 112371324A
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- coal
- coarse
- hydrocyclone
- separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/005—General arrangement of separating plant, e.g. flow sheets specially adapted for coal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C11/00—Accessories, e.g. safety or control devices, not otherwise provided for, e.g. regulators, valves in inlet or overflow ducting
Abstract
The invention discloses a high-efficiency separation process of coarse coal slime, wherein raw coal slime firstly enters a three-cone water medium cyclone for separation, the underflow of the three-cone water medium cyclone enters a TBS separator for further separation, TBS overflow and overflow of the three-cone water medium cyclone are concentrated by a hydrocyclone, the underflow of the hydrocyclone enters a laminated fine screen for fine classification, oversize products enter a vertical scraper centrifuge for deep dehydration and then serve as coarse and fine coal, and the overflow of the hydrocyclone, filtrate of the centrifuge and undersize products of the laminated fine screen enter a flotation link; and (3) after the TBS underflow is prepared by size mixing, feeding the TBS underflow into a spiral sorting machine, sorting out middling coal and gangue materials, dehydrating the middling coal and gangue materials by a high-frequency vibrating screen to obtain middling coal and gangue products, and feeding the undersize materials of the vibrating screen into a flotation link. The coarse slime is separated into clean coal, middlings and gangue in a multi-section separation mode, so that the system stability is good, and the production and operation cost is low; not only improves the sorting precision of coarse slime, but also stabilizes the yield of clean coal and the product quality.
Description
Technical Field
The invention relates to the technical field of coal washing, in particular to a high-efficiency separation process of coarse slime.
Background
Along with the improvement of the coal mining mechanization degree and the deepening of the coal seam mining degree, the quality of the selected raw coal gradually becomes worse, the content of the primary coal slime is continuously improved, and the proportion of the coarse clean coal slime in clean coal products is correspondingly improved. At present, equipment such as a TBS (bulk mechanical System) separator, a three-cone-angle cyclone, a coal slime dense-medium cyclone and the like are adopted in the coarse coal slime separation link, and most of the equipment is a one-section type separation process.
When the conventional coarse slime separation process is used for treating high-ash and high-fine-slime coal slime, the defects of low separation precision, high clean coal ash content and poor separation stability generally exist, and in order to ensure the maximization of clean coal yield, the problems of high clean coal ash content, low calorific value and the like caused by the fact that the coarse slime tailing ash content is high and the middling coal is doped are solved, so that the normal use of the electric coal in a mine is seriously influenced. Therefore, how to improve the coarse slime separation precision and stabilize the product quality is more and more emphasized by enterprises.
The separation process adopts a three-cone-angle cyclone, a TBS separator and a spiral separator combined separation and a laminated fine-screening fine-grading desliming process, flexibly adjusts the product structure through a multi-section separation mode, separates coarse and fine coal slime, coarse and medium coal slime and gangue, ensures the yield of clean coal and stabilizes the product quality.
Disclosure of Invention
The invention aims to provide an efficient coarse coal slime separation process, which effectively combines a three-cone-angle cyclone separator, a TBS separator and a spiral separator and adopts a laminated fine screening and fine grading desliming process to separate coarse and fine coal slime, coarse and medium coal slime and gangue, thereby ensuring the yield of clean coal and stabilizing the product quality.
In order to achieve the purpose, the invention provides the following technical scheme:
the high-efficiency coarse slime separation process is characterized by comprising the following process steps of:
firstly, the method comprises the following steps: the raw coal slime firstly enters a three-cone water medium cyclone for separation, and the bottom flow of the three-cone water medium cyclone enters a TBS separator for further separation;
secondly, the method comprises the following steps: concentrating overflow of a TBS separator and overflow of a three-cone water medium cyclone by a hydrocyclone, enabling underflow of the hydrocyclone to enter a laminated fine screen for fine classification, enabling oversize products to enter a vertical scraper centrifuge for deep dehydration and then serve as coarse and fine coal, and enabling overflow of the hydrocyclone and undersize materials of the laminated fine screen to enter a flotation link;
thirdly, the method comprises the following steps: the TBS separator enters a spiral separator after preparation of slurry mixing in a bottom flow, middlings and waste rock materials are separated, then the middlings and the waste rock products are formed after dehydration through a high-frequency vibrating screen, and the materials below the vibrating screen enter a flotation link.
The main selection equipment of the separation process is a three-cone-angle water medium cyclone, a TBS separator and a spiral separator.
The separation process of the invention separates the coarse coal slime into coarse clean coal, coarse middling coal and gangue.
In the sorting process, the TBS overflow and the overflow of the three-cone water medium swirler adopt the processes of pre-desliming of the hydrocyclone and deep desliming of the laminated fine screen.
The sorting pressure of the three-cone water medium cyclone in the sorting process is controlled to be 0.60-0.80 Mpa.
The invention relates to a spiral separator in the separation processSorting density control>1.80g/cm3。
Compared with the prior art, the invention has the beneficial effects that: the raw coal slime in the process is primarily sorted by the three-cone water medium swirler to discharge a large amount of high-ash fine mud, so that a good sorting environment is created for the TBS sorter. The coarse coal slime is separated into coarse and fine coal slime, coarse and medium coal slime and gangue by adopting the combined separation of a three-cone-angle water medium cyclone, a TBS separator and a spiral separator and the fine classification and desliming of a laminated fine screen, so that the coarse coal slime fine separation and classification process is formed. The process has the advantages of high separation precision and good operation stability, and not only ensures the yield of clean coal, but also stabilizes the product quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a process flow diagram of a coarse coal slime high-efficiency separation process.
FIG. 2 is a connection diagram of the equipment of the coarse coal slime high-efficiency separation process.
In the figure, 1-three-cone water medium cyclone, 2-TBS separator, 3-spiral separator, 4-hydrocyclone, 5-gangue high-frequency vibrating screen, 6-middling coal high-frequency vibrating screen, 7-laminated fine screen and 8-vertical scraper centrifuge.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
Referring to fig. 1-2, the sorting process of the present invention comprises the steps of:
firstly, the method comprises the following steps: the raw coal slime firstly enters a three-cone water medium cyclone 1 for separation, the bottom flow of the three-cone water medium cyclone 1 enters a TBS separator 2 for further separation, and the overflow of the three-cone water medium cyclone enters a concentrate barrel.
Secondly, the method comprises the following steps: the overflow of the TBS separator 2 automatically flows into a concentrate barrel, the underflow of the TBS separator 2 enters a spiral separator 3 to separate out middlings and waste rock materials after size mixing preparation, the middlings and the waste rock materials are dehydrated by a waste rock high-frequency vibrating screen 5 and a middlings high-frequency vibrating screen 6 respectively to become middlings and waste rock products, and undersize materials of the waste rock high-frequency vibrating screen 5 and the middlings high-frequency vibrating screen 6 enter a flotation link.
Thirdly, the method comprises the following steps: the materials in the concentrate barrel are deslimed and concentrated in advance through the hydrocyclone 4, the underflow enters the laminated fine screen 7 for deep desliming and ash reduction, the materials on the laminated fine screen 7 enter the vertical scraper centrifuge 8 for deep dehydration to serve as coarse and clean coal, and the overflow of the hydrocyclone 4, the filtrate of the vertical scraper centrifuge 8 and the materials under the laminated fine screen 7 enter the flotation link.
The coarse coal slime is separated into coarse and fine coal slime, coarse and medium coal slime and gangue by adopting the combined separation of a three-cone-angle water medium cyclone, a TBS separator and a spiral separator and the fine classification and desliming of a laminated fine sieve, so that the coarse coal slime fine separation and classification process is formed. The process has the advantages of high separation precision and good operation stability, and not only ensures the yield of clean coal, but also stabilizes the product quality.
The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (4)
1. The high-efficiency coarse slime separation process is characterized by comprising the following process steps of:
firstly, the method comprises the following steps: the raw coal slime firstly enters a three-cone water medium cyclone for separation, and the bottom flow of the three-cone water medium cyclone enters a TBS separator for further separation;
secondly, the method comprises the following steps: concentrating overflow of a TBS separator and overflow of a three-cone water medium cyclone by a hydrocyclone, enabling underflow of the hydrocyclone to enter a laminated fine screen for fine classification, enabling oversize products to enter a vertical scraper centrifuge for deep dehydration and then serve as coarse and fine coal, and enabling overflow of the hydrocyclone and undersize materials of the laminated fine screen to enter a flotation link;
thirdly, the method comprises the following steps: the TBS separator enters a spiral separator after preparation of slurry mixing in a bottom flow, middlings and waste rock materials are separated, then the middlings and the waste rock products are formed after dehydration through a high-frequency vibrating screen, and the materials below the vibrating screen enter a flotation link.
2. The coarse coal slime high efficiency separation process as set forth in claim 1 wherein said TBS classifier overflow and said tri-cone hydrocyclone overflow are pre-desliming with hydrocyclone, and deep desliming with laminated fine screen.
3. The high-efficiency coarse coal slime separation process of claim 1 wherein the separation pressure of the tri-cone hydrocyclone is controlled to be 0.60-0.80 Mpa.
4. The high efficiency coarse coal slime separation process of claim 1 wherein the spiral classifier separation density control>1.80g/cm3。
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| CN202010991367.XA CN112371324A (en) | 2020-09-21 | 2020-09-21 | Efficient coarse slime separation process |
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| CN202010991367.XA CN112371324A (en) | 2020-09-21 | 2020-09-21 | Efficient coarse slime separation process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372495A (en) * | 2012-04-13 | 2013-10-30 | 金易通科技(北京)股份有限公司 | Coarse slime separating system and method |
| CN103464272A (en) * | 2013-09-02 | 2013-12-25 | 山东科技大学 | Coarse coal slime two-section water medium sorting method |
| CN104549710A (en) * | 2014-12-26 | 2015-04-29 | 中国矿业大学 | Three-stage opening compounding separation process and three-stage opening compounding separation system for coarse slime |
| CN205797474U (en) * | 2016-06-20 | 2016-12-14 | 中国神华能源股份有限公司 | A kind of high ash coarse slime degree of depth fall ash system |
| CN208390226U (en) * | 2018-05-29 | 2019-01-18 | 平顶山天安煤业天宏选煤有限公司 | A kind of fine graded drop ash system of coarse slime |
-
2020
- 2020-09-21 CN CN202010991367.XA patent/CN112371324A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372495A (en) * | 2012-04-13 | 2013-10-30 | 金易通科技(北京)股份有限公司 | Coarse slime separating system and method |
| CN103464272A (en) * | 2013-09-02 | 2013-12-25 | 山东科技大学 | Coarse coal slime two-section water medium sorting method |
| CN104549710A (en) * | 2014-12-26 | 2015-04-29 | 中国矿业大学 | Three-stage opening compounding separation process and three-stage opening compounding separation system for coarse slime |
| CN205797474U (en) * | 2016-06-20 | 2016-12-14 | 中国神华能源股份有限公司 | A kind of high ash coarse slime degree of depth fall ash system |
| CN208390226U (en) * | 2018-05-29 | 2019-01-18 | 平顶山天安煤业天宏选煤有限公司 | A kind of fine graded drop ash system of coarse slime |
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Application publication date: 20210219 |