CN213700303U - High-efficient system of reselecting of middling - Google Patents
High-efficient system of reselecting of middling Download PDFInfo
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- CN213700303U CN213700303U CN202022334526.7U CN202022334526U CN213700303U CN 213700303 U CN213700303 U CN 213700303U CN 202022334526 U CN202022334526 U CN 202022334526U CN 213700303 U CN213700303 U CN 213700303U
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Abstract
The utility model discloses a middling efficient recleaning system, which comprises a middling prefabricating system, wherein the middling prefabricating system comprises a fine crusher for finely crushing middling and a classifying screen connected with the fine crusher, and the classifying screen is matched with the fine crusher to sort out middling particles with different particle sizes; the separation system comprises a flotation machine arranged on a classifying screen and used for floating middlings with the particle size of less than or equal to 0.25mm, a spiral screen arranged on the classifying screen and used for gravity screening of middlings with the particle size of more than 0.25mm and less than or equal to 3mm, and a jigging coal washer arranged on the classifying screen and used for washing the middlings with the particle size of more than 3 mm; the fine selection system comprises a clean coal screen, a filter press and a centrifugal machine which is connected with the clean coal screen and used for dewatering and grading. The utility model discloses a high-efficient system of reselecting of middling directly produces the sorting process of clean coal, tail coal and waste rock, improves the rate of recovery of clean coal in the middling and draws the less clean coal that contains the miscellaneous volume.
Description
Technical Field
The utility model relates to a clean coal reselects technical field, in particular to high-efficient system of reselecting of middling coal.
Background
The coal washing is an industrial process for removing impurities in raw coal and classifying and extracting high-quality coal and low-quality coal, and is an important process for coal deep processing.
The mixing of the raw coal with small ash content and large ash content results in different quality of coal, and the raw coal is mixed with many impurities in the mining process. Therefore, the coal transportation cost can be reduced and the utilization rate of the coal can be improved by washing the coal. The products produced after coal washing are generally divided into gangue, middling coal, clean coal and tail coal, the finished coal after the coal washing process is generally called clean coal, the ash content and the sulfur content of the clean coal after washing are greatly reduced, the clean coal is an energy source which can be generally used as fuel and is mainly used for coking, and the standard for coking is achieved through the industrial processes of sulfur removal, impurity removal and the like; the middling is a mixture of coal gangue and clean coal separated from raw coal, is a mixture between the clean coal and the gangue in raw coal washing, and is basically characterized by high ash content and high content of non-combustible substances relative to the raw coal, but also contains a certain amount of combustible substances.
The prior art has the defects that only the medium coal slime is extracted and roughly extracted, and the granular medium coal is not effectively extracted and selected. A great part of clean coal is not extracted, recovered and reused. Meanwhile, the content of impurities in the clean coal extracted from the middlings is high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is not enough that prior art exists to the purpose is overcome to select separately to the middling, on the production basis of main election system, through the sorting process of the direct production clean coal of system of reselecting, tail coal and waste rock, improve the rate of recovery of clean coal in the middling and draw the less clean coal that contains the miscellaneous volume.
In order to achieve the above purpose, a high-efficiency medium coal recleaning system is adopted to solve the problems in the background technology.
A high-efficiency middling coal recleaning system comprises:
the middling prefabricating system comprises a fine crusher for finely crushing middling and a classifying screen connected with the fine crusher, wherein the classifying screen is matched with the fine crusher to sort out middling particles with different particle sizes;
the separation system comprises a flotation machine arranged on a classifying screen and used for floating middlings with the particle size of less than or equal to 0.25mm, a spiral screen arranged on the classifying screen and used for gravity screening of middlings with the particle size of more than 0.25mm and less than or equal to 3mm, and a jigging coal washer arranged on the classifying screen and used for washing the middlings with the particle size of more than 3 mm;
the fine selection system comprises a clean coal screen, a filter press and a centrifugal machine which is connected with the clean coal screen and used for dewatering and grading.
By adopting the technical scheme, the middlings are firstly screened by the fine crusher and the classifying screen, and middlings with different particle sizes are extracted by screening. Then, the middlings with the particle sizes of less than or equal to 0.25mm are further subjected to flotation by a flotation machine, the middlings with the particle sizes of more than 0.25mm and less than or equal to 3mm are screened by a spiral screen through gravity, and the middlings with the particle sizes of more than 3mm are washed and selected by a jigging coal washer. And finally, finishing the final clean coal concentration through a clean coal screen, a filter press and a centrifugal machine which is connected with the clean coal screen and used for dewatering and grading.
As a further aspect of the present invention: and a belt conveyor is arranged between the fine crusher and the classifying screen.
By adopting the technical scheme, the belt conveyor is arranged to sieve the crushed middlings into middlings particles with different particle sizes through the grading sieve.
As a further aspect of the present invention: the fine coal sieve is respectively connected with the flotation machine, the spiral sieve and the jigging coal washer.
By adopting the technical scheme, the device is used for receiving and filtering the cleaned coal washed and sorted by the sorting system.
As a further aspect of the present invention: the flotation machine and the jigging coal washer are provided with filter presses.
By adopting the technical scheme, the tailing coal extracted by the flotation machine and the jigging coal washer is pressed and dried by a filter press.
As a further aspect of the present invention: the flotation machine is provided with a preconditioner for agitation mixing.
By adopting the technical scheme, the preprocessor is used for mixing and stirring the flotation agent, and the flotation agent is the flotation agent with the ratio of the foaming agent to the collecting agent of 3: 1-2: 1.
As a further aspect of the present invention: the jigging coal washer is provided with a gangue bucket elevator.
By adopting the technical scheme, the selected gangue is transported out by using the bucket elevator and is used as fuel.
Compared with the prior art, the utility model discloses there are following technological effect: on the basis of the original system flow for extracting the middlings, the middlings are sorted, and on the basis of the production of a main separation system, a sorting process for directly producing clean coal, tailing coal and gangue is adopted by a recleaning system, so that the recovery rate of the clean coal in the middlings is improved, and the clean coal with less impurity content is extracted.
Drawings
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings:
fig. 1 is a schematic diagram of a high-efficient middlings recleaning system disclosed by the utility model.
In the figure: 1. a middling coal prefabrication system; 10. a belt conveyor; 11. a fine crusher; 12. grading and screening; 2. a sorting system; 20. a filter press; 21. a flotation machine; 210. a preprocessor; 22. a spiral screen; 23. a jigging coal washer; 230. a gangue bucket elevator; 3. a concentration system; 31. screening the refined coal; 32. a centrifugal machine.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a system for efficiently recleaning middlings includes a system for prefabricating middlings 1, a sorting system 2 and a concentration system 3.
The middling prefabrication system 1 comprises a fine crusher 11 for finely crushing middling coal, and a classifying screen 12 connected to the fine crusher 11 and used for classifying and screening middling coal particles with different particle sizes, wherein the classifying screen 12 is matched with the fine crusher 11 to classify the middling coal particles with different particle sizes, the middling coal particles with different particle sizes are further extracted, and a belt conveyor 10 is arranged between the fine crusher 11 and the classifying screen 12.
And the separation system 2 comprises a flotation machine 21 which is arranged on the classifying screen 12 and is used for flotation of middlings with the particle size of less than or equal to 0.25mm, and middlings particles with the particle size are subjected to flotation by adopting a flotation process to float and separate tailing coal and clean coal. The spiral screen 22 arranged on the classifying screen 12 and used for gravity screening of the middlings with the particle sizes larger than 0.25mm and smaller than or equal to 3mm is used for screening gangue and clean coal through the spiral screen 22 by adopting a gravity separation process, and the jig coal washer 23 arranged on the classifying screen 12 and used for washing the middlings with the particle sizes larger than 3mm is used for washing the gangue, the clean coal and the tail coal.
A beneficiation system 3, the beneficiation system comprising a clean coal screen 31, and a centrifuge 32 connected to the clean coal screen 31 for dewatering classification. Wherein the fine coal screen 31 is respectively connected with the flotation machine 21, the spiral screen 22 and the jigging coal washer 23. The clean coal screen 31 can cooperate with a centrifuge 32 to dewater and classify the clean coal extracted by the flotation machine 21, the spiral screen 22 and the jigging coal washer 23 to be used as a raw material for coking.
In some disclosed embodiments, the flotation machine 21 and the coal jig washer 23 are provided with a filter press 20, and the filter press 20 can dry the tailings extracted by the flotation machine 21 and the coal jig washer 23.
In some disclosed embodiments, the flotation machine 21 is provided with a preconditioner 210 for mixing agitation, wherein a flotation agent having a ratio of frother to collector for mixing agitation of the preconditioner 210 of between 3:1 and 2:1 is stored and is used in the flotation process with sufficient agitation.
In some disclosed embodiments, the jig washer is provided with a mine waste bucket elevator 230 capable of moving out the washed mine waste.
The following is the working principle and working process of some embodiments disclosed by the utility model:
firstly, carrying out fine crushing treatment on the middlings by using a fine crusher 11;
screening the middlings after the fine crushing by using a grading sieve 12 to sort out middlings with different particle sizes, and then extracting clean coals according to the middlings with different particle sizes;
for powdery middling coal particles with the particle size of less than or equal to 0.25mm, adopting a flotation process, adding a flotation agent which is stored in a preprocessor 210 and is mixed and stirred and a flotation agent with the collecting agent ratio of 3:1 to 2:1 according to different content of clean coal, fully stirring, washing and selecting the middling coal particles with the particle size by using a flotation machine 21, and floating tailing coal and clean coal;
for granular middling particles with the particle size of more than 0.25mm and less than or equal to 3mm, adopting a gravity separation process, and screening out gangue and clean coal through a spiral screen 22 under the action of gravity;
for granular medium coal particles with the particle size larger than 3mm, a jigging coal washer 23 is adopted to wash and select gangue, clean coal and tail coal, and a gangue bucket elevator 230 is used to transport the selected gangue out to be used as fuel;
the tail coal is pressed dry by a filter press 20, and the clean coal washed by the jigging coal washer 23 is dehydrated and graded by a clean coal screen 31 and a centrifuge 32 to be used as a raw material for coking.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents, all of which are intended to be encompassed within the scope of the invention.
Claims (6)
1. A system for efficiently recleaning middlings is characterized by comprising:
the middling prefabrication system (1) comprises a fine crusher (11) for finely crushing middling and a classifying screen (12) connected to the fine crusher, wherein the classifying screen is matched with the fine crusher to sort out middling particles with different particle sizes;
the separation system (2) comprises a flotation machine (21) which is arranged on a classifying screen and used for floating middlings with the particle size of less than or equal to 0.25mm, a spiral screen (22) which is arranged on the classifying screen and used for gravity screening of middlings with the particle size of more than 0.25mm and less than or equal to 3mm, and a jigging coal washer (23) which is arranged on the classifying screen and used for washing the middlings with the particle size of more than 3 mm;
a beneficiation system (3) comprising a clean coal screen (31), and a centrifuge (32) connected to the clean coal screen for dewatering classification.
2. A high-efficiency medium coal recleaning system as claimed in claim 1, wherein a belt conveyor (10) is arranged between the fine crusher and the classifying screen.
3. The system of claim 1, wherein the clean coal screen is connected to the flotation machine, the spiral screen, and the jig coal washer.
4. The system for efficiently recleaning middlings as claimed in claim 3, wherein said flotation machine and coal jig washer are provided with a filter press (20).
5. A system for efficient recleaning of middlings as claimed in claim 4, characterized in that said flotation machine is provided with a preconditioner (210) for mixing by agitation.
6. The system for efficiently recleaning middlings as claimed in claim 4, wherein said jigging washer is provided with a gangue hopper lifter (230).
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| CN202022334526.7U CN213700303U (en) | 2020-10-19 | 2020-10-19 | High-efficient system of reselecting of middling |
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| CN202022334526.7U CN213700303U (en) | 2020-10-19 | 2020-10-19 | High-efficient system of reselecting of middling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113769884A (en) * | 2021-08-27 | 2021-12-10 | 杨高灵 | Coal washing and dressing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113769884A (en) * | 2021-08-27 | 2021-12-10 | 杨高灵 | Coal washing and dressing process |
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