CN213287255U - Coal tailing fine coal dehydration recovery system - Google Patents
Coal tailing fine coal dehydration recovery system Download PDFInfo
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- CN213287255U CN213287255U CN201921832957.7U CN201921832957U CN213287255U CN 213287255 U CN213287255 U CN 213287255U CN 201921832957 U CN201921832957 U CN 201921832957U CN 213287255 U CN213287255 U CN 213287255U
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Abstract
The utility model relates to an utilize coal tailing fine coal dehydration recovery system, retrieve subsystem and middlings dehydration including clean coal dehydration, clean coal dehydration recovery subsystem sets up to obtain elementary thick clean coal and thick clean coal screen drainage after the clean coal magnetic separation tailing passes through first stromatolite high frequency sieve, elementary thick clean coal lets in thick clean coal centrifuge centrifugal separation and obtains thick clean coal, thick clean coal screen drainage passes through flotation device and pressure filter, obtain the flotation clean coal, middlings dehydration recovery subsystem sets up to obtain elementary middlings and middlings screen drainage after the middlings magnetic separation tailing passes through second stromatolite high frequency sieve, elementary middlings separate out the middlings through middlings centrifuge, middlings screen drainage lets in the concentrator and obtains the concentrated coal, the beneficial effects of the utility model are that: the problem of the vibrating sieve bend water running is solved, the process flow is simplified, the energy consumption is saved, the economic benefit is improved, and the utilization rate of water resources is improved.
Description
Technical Field
The utility model belongs to the technical field of coal mining, more specifically say, the utility model relates to a colliery tail coal dehydration retrieves technology.
Background
At present, most coal preparation plants adopt a combined production process of raw coal dense medium and coal slurry flotation and a '2 + 2' coal slurry water treatment process to recover coal mine tailings. For the dehydration and recovery of the heavy medium coarse clean coal, a combined dehydration process of a traditional vibrating arc screen and a vertical centrifuge is adopted, and for the dehydration and recovery of the final coal slime, a dehydration and recovery process of a sedimentation centrifuge is utilized to be merged into the middlings.
In actual production practice, these two dehydration processes have several disadvantages:
firstly, the sieve bend is easy to flee materials, so that the screening efficiency is reduced, and the dehydration efficiency of the centrifuge is influenced; the arc sieve plate is frequently turned around and inconvenient to replace, and the cost is high; under the lower limit of screening by the sieve bend, the coal in the powder has the secondary recovery phenomenon, and the dehydration recovery process is repeated;
and secondly, the energy consumption of the flotation machine and the filter press is high, and the cost consumption is not favorably controlled. There is therefore a great need to optimize the above-mentioned problems in terms of process.
SUMMERY OF THE UTILITY MODEL
Utility model's aim at furthest's solution fine coal dehydration recovery system in the sieve bend lead to the problem that screening efficiency is low, technology is complicated and the system consumes energy high, provides a tailing ore deposit fine coal dehydration recovery system.
In order to realize the purpose, the utility model discloses the technical scheme who takes does:
the utility model provides a coal tailing fine particle coal dehydration recovery system, this coal tailing fine particle coal dehydration recovery system include clean coal dehydration recovery subsystem and middlings dehydration recovery subsystem, and clean coal dehydration recovery subsystem and middlings dehydration recovery subsystem pass through the pipe connection.
The clean coal dehydration recovery subsystem comprises a first laminated high-frequency sieve, a flotation machine, a pressure filter and a coarse clean coal centrifuge, wherein the first laminated high-frequency sieve, the flotation machine and the pressure filter are sequentially connected in series through a pipeline, and the first laminated high-frequency sieve is connected with the input end of the coarse clean coal centrifuge through a pipeline.
The middlings dehydration recovery subsystem comprises a second laminated high-frequency sieve, a middlings centrifuge and a tailing thickener, the second laminated high-frequency sieve is connected with the input ends of the middlings centrifuge and the tailing thickener through pipelines, and fine sludge base liquid generated by flotation in the clean coal dehydration recovery subsystem is introduced into the second laminated high-frequency sieve in the middlings dehydration recovery subsystem through a pipeline.
The clean coal dehydration recovery subsystem is externally connected with a water storage tank, a flotation clean coal collecting device and a coarse clean coal collecting device, the water storage tank and the flotation clean coal collecting device are respectively externally connected with the output end of the filter press through pipelines, the coarse clean coal collecting device is externally connected with the output end of a coarse clean coal centrifugal machine through pipelines, the medium coal dehydration recovery subsystem is externally connected with a concentrated coal collecting device and a medium coal collecting device, the concentrated coal collecting device is externally connected with the output end of a tail coal concentrator through pipelines, and the medium coal collecting device is externally connected with the output end of the medium coal centrifugal machine through pipelines.
The tail coal thickener is a device which adds a flocculating agent into the water under the middlings screen to make the coal particles under the middlings screen form floccules to accelerate the sedimentation so as to achieve the purpose of improving the concentration efficiency. The flotation machine is arranged as a device for separating clean coal, the clean coal in the flotation machine is fixed on bubbles by stirring and aeration to form liquid foam, and the rest part of the clean coal is kept in the ore pulp. The filter press is provided as a mechanical device for dialyzing a liquid by applying a pressure to a filter press object using a filter medium.
A dehydration recovery method of a coal tailing fine coal dehydration recovery system comprises the following steps:
s1, adding the cleaned coal magnetic separation tailings into the first laminated high-frequency sieve, and performing screening treatment on the part above the sieve to obtain primary coarse cleaned coal, wherein the part below the sieve to obtain coarse cleaned coal screen water, the primary coarse cleaned coal is introduced into a coarse cleaned coal centrifuge to perform centrifugal separation to obtain coarse cleaned coal and coarse cleaned coal supernatant, the coarse cleaned coal supernatant flows back to the first laminated high-frequency sieve through a pipeline to be screened again, and the coarse cleaned coal screen water is subjected to flotation and filter pressing through a flotation machine and a filter press to obtain flotation cleaned coal, fine mud bottom liquid and reclaimed water.
S2, adding middlings magnetic separation tailings into the second laminated high-frequency sieve for sieving, wherein the upper part of the sieve is primary coarse clean coal, the lower part of the sieve is middlings screen drainage, the primary middlings enter the middlings centrifuge to separate middlings and middlings supernatant, the middlings supernatant respectively returns to the second laminated high-frequency sieve for secondary sieving, and the middlings screen drainage directly enters the tailings thickener for concentration to obtain concentrated coal.
And (3) introducing coarse clean coal in the S1 into a coarse clean coal collecting device, introducing flotation clean coal into a flotation clean coal collecting device, collecting reclaimed water in a water storage tank, introducing a fine sludge base solution into a second laminated high-frequency sieve for secondary screening, introducing middlings in the S2 into a middlings collecting device, and collecting concentrated coal to the concentrated coal collecting device.
Adopt the utility model discloses a technical scheme, through adopting the mutual combined technological means of coarse clean coal dehydration recovery subsystem and middlings dehydration recovery subsystem, make the phenomenon of "scurrying material" running water of coal tailing fine particle coal dehydration recovery system fine particle coal screening in-process obtain solving, centrifuge's work efficiency obtains improving, the site environment obtains very big improvement, replace the shale shaker through adopting stromatolite high frequency sieve, the process flow has been simplified, bring the reduction by a wide margin of plant maintenance work load, improve the efficiency that the equipment overhauld and maintained, practice thrift the energy consumption, economic benefits is improved, the filter-pressing process produces the recycled water and carries out reuse, improve the utilization ratio of water resource.
Drawings
The contents of the drawings and the reference numerals in the drawings are briefly described as follows:
FIG. 1 is a process flow diagram of a system for dehydrating and recovering fine coal from coal tailings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
FIG. 1 is a flow chart of the system for dehydrating and recycling fine coal from coal tailings, as shown in the figure:
a coal tailing fine coal dehydration recovery system is provided with a clean coal dehydration recovery subsystem and a middlings dehydration recovery subsystem, wherein the clean coal dehydration recovery subsystem and the middlings dehydration recovery subsystem are connected through a pipeline.
The clean coal dehydration recovery subsystem comprises a first laminated high-frequency sieve, a flotation machine, a pressure filter and a coarse clean coal centrifuge, wherein the first laminated high-frequency sieve, the flotation machine and the pressure filter are sequentially connected in series through a pipeline, and the first laminated high-frequency sieve is connected with the input end of the coarse clean coal centrifuge through the pipeline.
The middlings dehydration recovery subsystem comprises a second laminated high-frequency sieve, a middlings centrifuge and a tailing thickener, the second laminated high-frequency sieve is connected with the input ends of the middlings centrifuge and the tailing thickener through pipelines, and fine sludge base liquid generated by flotation in the clean coal dehydration recovery subsystem is introduced into the second laminated high-frequency sieve in the middlings dehydration recovery subsystem through a pipeline.
Adding the clean coal magnetic separation tailings into the first laminated high-frequency sieve and carrying out screening treatment, wherein the upper part of the sieve is primary coarse clean coal, the lower part of the sieve is coarse clean coal sieve water, the primary coarse clean coal is introduced into a coarse clean coal centrifuge to carry out centrifugal separation to obtain coarse clean coal and coarse clean coal supernatant, the coarse clean coal supernatant flows back to the first laminated high-frequency sieve through a pipeline to be screened again, and the coarse clean coal sieve water is subjected to flotation and filter pressing through a flotation machine and a filter press to obtain flotation clean coal, fine sludge base liquor and reclaimed water.
And adding middlings magnetic separation tailings into the second laminated high-frequency sieve for sieving, wherein the upper part of the sieve is primary coarse clean coal, the lower part of the sieve is middlings screen drainage, primary middlings enter the middlings centrifuge to separate middlings and middlings supernatant, the middlings supernatant respectively returns to the second laminated high-frequency sieve for secondary sieving, and the middlings screen drainage directly enters the tailing thickener for concentration to obtain concentrated coal.
Coarse clean coal is fed into the coarse clean coal collecting device, flotation clean coal is fed into the flotation clean coal collecting device, reclaimed water is collected in the water storage tank, fine sludge base solution is fed into the second laminated high-frequency sieve for secondary screening, middlings are fed into the middlings collecting device, and concentrated coals are collected into the concentrated coal collecting device.
Adopt the utility model discloses a technical scheme, through adopting the mutual combined technological means of coarse clean coal dehydration recovery subsystem and middlings dehydration recovery subsystem, make the phenomenon of "scurrying material" running water of coal tailing fine particle coal dehydration recovery system fine particle coal screening in-process obtain solving, centrifuge's work efficiency obtains improving, the site environment obtains very big improvement, replace the shale shaker through adopting stromatolite high frequency sieve, the process flow has been simplified, bring the reduction by a wide margin of plant maintenance work load, improve the efficiency that the equipment overhauld and maintained, practice thrift the energy consumption, economic benefits is improved, the filter-pressing process produces the recycled water and carries out reuse, improve the utilization ratio of water resource.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.
Claims (5)
1. A coal tailing fine coal dehydration recovery system which is characterized in that: the coal tailing fine coal dehydration recovery system comprises a clean coal dehydration recovery subsystem and a middling coal dehydration recovery subsystem, and the clean coal dehydration recovery subsystem and the middling coal dehydration recovery subsystem are connected through a pipeline; the system comprises a clean coal dehydration recovery subsystem, a first laminated high-frequency sieve, a flotation machine, a pressure filter and a coarse clean coal centrifuge, wherein the first laminated high-frequency sieve, the flotation machine and the pressure filter are sequentially connected in series through a pipeline; the middlings dehydration recovery subsystem comprises a second laminated high-frequency sieve, a middlings centrifuge and a tailing thickener, the second laminated high-frequency sieve is connected with the input ends of the middlings centrifuge and the tailing thickener through pipelines, and fine sludge base liquid generated by flotation in the clean coal dehydration recovery subsystem is introduced into the second laminated high-frequency sieve in the middlings dehydration recovery subsystem through a pipeline.
2. The coal tailings fine coal dewatering recovery system of claim 1, wherein: the clean coal dehydration recovery subsystem is externally connected with a water storage tank, a flotation clean coal collecting device and a coarse clean coal collecting device, the water storage tank and the flotation clean coal collecting device are respectively externally connected with the output end of the filter press through pipelines, the coarse clean coal collecting device is externally connected with the output end of a coarse clean coal centrifugal machine through pipelines, the medium coal dehydration recovery subsystem is externally connected with a concentrated coal collecting device and a medium coal collecting device, the concentrated coal collecting device is externally connected with the output end of a tail coal concentrator through pipelines, and the medium coal collecting device is externally connected with the output end of the medium coal centrifugal machine through pipelines.
3. The coal tailings fine coal dewatering recovery system of claim 1, wherein: the tail coal thickener is a device which adds a flocculating agent into the middling screen effluent to enable coal particles of the middling screen effluent to form floccules and accelerate sedimentation so as to achieve the purpose of improving concentration efficiency.
4. The coal tailings fine coal dewatering recovery system of claim 1, wherein: the flotation machine is arranged as equipment for separating clean coal, the clean coal in the flotation machine is fixed on bubbles to form liquid foam through stirring and aeration, and the rest part of the clean coal is kept in ore pulp.
5. The coal tailings fine coal dewatering recovery system of claim 1, wherein: the filter press is provided as a mechanical device for dialyzing a liquid by applying a pressure to a filter press object using a filter medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921832957.7U CN213287255U (en) | 2019-10-29 | 2019-10-29 | Coal tailing fine coal dehydration recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921832957.7U CN213287255U (en) | 2019-10-29 | 2019-10-29 | Coal tailing fine coal dehydration recovery system |
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| CN213287255U true CN213287255U (en) | 2021-05-28 |
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