CN111013808A - Process for treating screen water of desliming screen - Google Patents
Process for treating screen water of desliming screen Download PDFInfo
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- CN111013808A CN111013808A CN201911072484.XA CN201911072484A CN111013808A CN 111013808 A CN111013808 A CN 111013808A CN 201911072484 A CN201911072484 A CN 201911072484A CN 111013808 A CN111013808 A CN 111013808A
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- flotation
- water
- screening
- screen
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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
Abstract
The invention discloses a treatment process of screen water of a desliming screen, belonging to the field of clean coal screening; the technical scheme is characterized in that a, screening: firstly, removing media by a medium removing sieve, then sieving by a magnetic separator, and feeding the bottom flow into a clean coal water cyclone group; TBS screening: coal slime below a raw coal desliming screen is sorted by a TBS concentrate water cyclone group and sent into a desliming screen; c. flotation feeding and material distributing in a material feeding barrel: after the desliming sieve is screened, the screened water enters a flotation feeding barrel, and the screened water is divided by the flotation feeding barrel. The invention solves the problems that coarse particles are easy to enter a flotation machine due to the abrasion of a conventional desliming screen, and the flotation machine cannot perform flotation on the coarse particles, so that part of concentrate is lost, and achieves the effects of preventing the coarse particles from entering the flotation machine and avoiding the waste of the coarse particles.
Description
Technical Field
The invention relates to the field of clean coal screening, in particular to a process for treating screened water of a desliming screen.
Background
In the process of screening the clean coal, the clean coal is firstly screened, then desliming is carried out through a desliming screen, and the deslimed clean coal enters a flotation machine for flotation through flotation such as a charging basket, so that the aim of screening the clean coal is fulfilled.
The screen water of the existing desliming screen only goes to float and enters the charging bucket, when the screen surface is abraded or damaged in the production process, a large amount of coarse particles larger than 0.5mm enter the flotation machine, the flotation machine cannot recover the coarse particles larger than 0.5mm, and then the part of concentrate enters tailings and part of clean coal is lost.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a desliming screen water treatment process, which can distribute desliming screen water, so that coarse particles can return to the step a for screening again, the coarse particles are prevented from entering a flotation machine, and waste caused by the fact that the flotation machine cannot recover the coarse particles is prevented.
In order to achieve the purpose, the invention provides the following technical scheme: a process for treating sewage screened by a desliming screen comprises the following steps:
a. screening: firstly, removing media by a medium removing sieve, then sieving by a magnetic separator, and feeding the bottom flow into a clean coal water cyclone group;
TBS screening: coal slime below a raw coal desliming screen is sorted by a TBS concentrate water cyclone group and sent into a desliming screen;
c. flotation feeding and material distributing in a material feeding barrel: after the desliming sieve is screened, the screened water enters a flotation feeding barrel, and the screened water is divided by the flotation feeding barrel.
By adopting the technical scheme, the step a and the step b are carried out simultaneously, the raw coal is screened and then is pumped into the water cyclone group for separation, the underflow passes through the chute to the desliming screen, then the desliming screen is screened, the screened water enters the flotation feeding barrel, the flotation feeding barrel can divide the screened water into materials, so that coarse particles enter the step a again for secondary screening, the coarse particles are prevented from entering the flotation machine, and waste caused by the fact that the flotation machine cannot recycle the concentrate of the coarse particles is avoided.
The invention is further configured to: in the step a, the magnetic separator is screened and then enters a clean coal magnetic separation tailing bucket, and the clean coal water is pumped into a clean coal water swirler group through a water pump.
By adopting the technical scheme, the tailings can be selected by the clean coal magnetic separation tailing bucket, and the part with economic value in the tailings is selected, so that the aim of recycling is fulfilled, and the production cost is reduced.
The invention is further configured to: the flotation feed barrel is provided with a feed distribution assembly, and the feed distribution assembly can distribute screened water.
Through adopting above-mentioned technical scheme, divide the material subassembly and can divide the material to the sieve offal that gets into the flotation charging bucket, make the part that contains the coarse coal in the sieve offal can get back to step a again and sieve.
The invention is further configured to: the material distribution assembly comprises a return pipe connected with the flotation feeding barrel and a material guide pipe connected with the return pipe, and one end of the return pipe, which is far away from the material guide pipe, can be connected with a feeding hole of the clean coal tailing separation barrel;
one end of the material guide pipe is fixedly connected with the radian part on the return pipe, the other end of the material guide pipe is communicated with the flotation machine, a screening net is fixedly connected in the return pipe, and the screening net is positioned at the radian part of the return pipe and shields the connection part of the material guide pipe and the return pipe.
Through adopting above-mentioned technical scheme, the undersize water that flows out from the flotation pan feeding bucket can directly strike the screen cloth, and the through-hole on the screen cloth can supply tiny granule to pass through, and under the effect of impact force, tiny granule passes through the screen cloth and gets into the passage, gets into the flotation machine along the passage, and the flotation machine is retrieved tiny granule, and coarse grain is intercepted by the screen cloth, then gets back to and sieves again in the step a in getting into the return pipe.
The invention is further configured to: the screening net is arranged in an arc shape.
Through adopting above-mentioned technical scheme, the screen cloth that the arc set up can make the coarse grain better move along the screen cloth, avoids the coarse grain to remain on the screen cloth, reduces the probability that causes the screen cloth to block up, and the curved screen cloth can increase and sift the area of contact of water, carries out better branch material to sifting the water.
The invention is further configured to: the material distribution assembly comprises a screening net arranged in the floating material inlet barrel, the screening net is obliquely arranged, and a vertical baffle is fixedly connected to the oblique lower end of the screening net;
the bottom surface of the flotation feeding barrel is fixedly connected with a discharging pipe and a flow guide pipe respectively, the discharging pipe is connected with the bottom surface of the flotation feeding barrel below the screening net, and the flow guide pipe is connected to one side, far away from the discharging pipe, of the baffle plate.
By adopting the technical scheme, the contact area of the screen water is larger by the screening net positioned in the cylinder, the screen water can be better divided, coarse particles and fine particles are separated, the fine particles enter the flotation machine, and the coarse particles are returned to the step a for re-screening.
The invention is further configured to: a primary screen is arranged above the screening screen, the primary screen is also obliquely arranged and is opposite to the oblique direction of the screening screen, and screened water directly falls on the screening screen after flowing down from the primary screen;
an inclined guide plate is fixedly connected to the inclined lower end of the primary separation net, the inclined direction of the guide plate is the same as the inclined direction of the screening net, a vertical plate is fixedly connected to one end, away from the primary separation net, of the guide plate, and the lower end of the vertical plate is fixedly connected with the bottom surface of the flotation feeding barrel;
the flotation feeding barrel bottom surface between the discharging pipe and the vertical plate and the baffle is fixedly connected, the vertical plate is fixedly connected with a guide pipe on the flotation feeding barrel bottom surface far away from one side of the baffle, and one end of the guide pipe far away from the flotation feeding barrel is communicated with the guide pipe.
Through adopting above-mentioned technical scheme, the primary election net can carry out preliminary screening to the offal of sieving, and the screening net sieves once more, so can carry out secondary screening to the offal of sieving, more thoroughly that can sieve, the effect of improvement screening.
The invention is further configured to: the upper surfaces of the screening net and the primary screening net are plated with a layer of chromium.
Through adopting above-mentioned technical scheme, the upper surface of screening net and primary election net has plated the one deck chromium, can increase the smoothness on screening net, screening net and primary election net surface, can make that the coarse grain is better slide at screening net, screening net and primary election net, avoids causing the influence to the flow of coarse grain.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. screening by a: TBS screening: c. flotation material feeding barrel material distribution; the coarse particles and the fine particles can be separated, the fine particles enter the flotation machine to be recycled, and the coarse particles are returned to the step a again to be screened, so that waste caused by the fact that the coarse particles enter the flotation machine and cannot be recycled by the flotation machine is avoided;
2. the flotation charging bucket is internally provided with a primary screen and a screening screen, the primary screen and the screening screen are arranged in a bilateral symmetry manner, the primary screen is positioned above the screening screen, the inclination directions of the primary screen and the screening screen are opposite, the inclined lower end of the primary screen is fixedly connected with a baffle, the inclined lower end of the primary screen is fixedly connected with an inclined guide plate, the inclined lower end of the guide plate is fixedly connected with a vertical plate, the guide plate and the baffle form a channel for coarse particles to circulate, the fine particles pass through the primary screen and the screening screen, so that the coarse particles and the fine particles are separated, the purpose of material distribution is achieved, and the matching of the primary screen and the screening screen can have a more material distribution effect.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
fig. 2 is a schematic structural diagram of the second embodiment.
In the figure: 1. floating and feeding into a charging bucket; 2. a material distributing component; 21. a material guide pipe; 22. a return pipe; 23. screening a net; 24. primary screening; 241. a material guide plate; 242. a vertical plate; 25. screening the net; 251. a baffle plate; 26. a flow guide pipe; 27. a discharge pipe; 28. a conduit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
The first embodiment is as follows: a process for treating the water from a desliming screen, as shown in figure 1, comprises the following steps:
a. screening: the three-product cyclone separates clean coal, the medium is removed by a medium removing sieve, the dilute medium section of the medium removing sieve is separated by a magnetic separator, the magnetic separation tailings enter a clean coal magnetic separation tailing barrel, the clean coal magnetic separation tailings are pumped into a clean coal water cyclone group by a pump, and the bottom flow passes through a chute to a desliming sieve;
TBS screening: the coal slime under the screen of the raw coal desliming screen passes through a coal slime barrel and is sent into a coal slime water cyclone group by a pump, the bottom flow of the coal slime water cyclone group is sorted by TBS, the TBS overflow flows into a TBS concentrate barrel and is sent into the TBS concentrate water cyclone group by the pump for sorting, and the bottom flow passes through a chute to the desliming screen;
c. flotation charging bucket 1 divides the materials: and (b) screening the desliming screen, enabling screened water to enter the flotation charging barrel 1, enabling the flotation charging barrel 1 to divide the screened water, enabling fine particles to enter the flotation machine, and enabling coarse particles to return to the step (a) for secondary screening.
Screening is carried out simultaneously in steps a and b, raw coal in different states can be screened, and then clean coal can be better screened, screening is finished and then the raw coal is sent to enter a desliming screen for desliming, screened water enters a flotation charging bucket 1, a material distributing component 2 exists in the flotation charging bucket 1, the material distributing component 2 can separate coarse particles and fine particles in the screened water, the fine particles enter a flotation machine for flotation, the flotation machine can recover the fine particles, the coarse particles can flow back to step a for re-screening, and therefore the coarse particles are prevented from entering the flotation machine, and waste caused by the fact that the flotation machine cannot recover the coarse particles is avoided.
As shown in fig. 1, the material distributing assembly 2 includes a material guiding pipe 21 fixedly connected to the lower end of the flotation material feeding barrel 1 and a return pipe 22 connected to the material guiding pipe 21, the connection between the return pipe 22 and the flotation material feeding barrel 1 is arranged in an arc shape, the material guiding pipe 21 is connected to the arc-shaped portion of the material returning pipe 22, the return pipe 22 is communicated with the material guiding pipe 21, a screening net 23 is arranged inside the return pipe 22, the screening net 23 is located at the connection between the return pipe 22 and the material guiding pipe 21, the screening net 23 can screen screened water entering the return pipe 22, and meshes on the screening net 23 can be used for fine particles to block coarse particles; the screening net 23 achieves the purpose of material distribution, so that fine particles enter the material guide pipe 21, and coarse particles enter the return pipe 22; one end of the return pipe 22, which is far away from the material guide pipe 21, is connected with the clean coal magnetic separation tailing bucket in the step a, so that coarse particles can flow back to the step a for re-screening, one end of the material guide pipe 21, which is far away from the flotation charging bucket 1, is connected with the flotation machine, so that fine particles can enter the flotation machine and are recovered by the flotation machine; screening net 23 is the arc setting, can reduce the probability that the coarse grain piles up in screening net 23 department, can also increase the area of contact of screening net 23 and under-sieve water, can be better divide the material to under-sieve water.
Example two: as shown in fig. 2, the present embodiment is different from the previous embodiment in that the material distribution assembly 2 includes a primary separation net 24 and a screening net 25, the primary separation net 24 is located above the screening net 25, the primary separation net 24 and the screening net 25 are both arranged in an inclined manner, and the inclined directions are opposite, so that the screened water firstly falls on the primary separation net 24 for screening, and then flows from the primary separation net 24 to the screening net 25 for secondary screening; an inclined guide plate 241 is fixedly connected to the inclined lower end of the primary separation net 24, the inclined direction and the angle of the guide plate 241 are the same as those of the screening net 25, a vertical plate 242 is fixedly connected to the inclined lower end of the guide plate 241, and the lower end of the vertical plate 242 is fixedly connected to the bottom surface of the flotation feeding barrel 1; the inclined lower end of the screening net 25 is fixedly connected with a vertical baffle 251; mesh on primary election net 24 and the screening net 25 all can supply passing through of fine particle, block the coarse granule, and then can realize the branch material to the screening water, the fine granule falls into in the space of primary election net 24 and screening net 25 below, the coarse granule flows along primary election net 24 and screening net 25 and falls into in the space between baffle 251 and the riser 242, thereby make coarse granule and fine granule can separate, stock guide 241 can lead to the fine granule of screening, make the fine granule flow along stock guide 241, can also prevent the screening water intercommunication on screening water and the screening net 25 after the screening, avoid causing the influence to the screening effect.
As shown in fig. 2, the honeycomb duct 26 is fixedly connected to the lower surface of the flotation feeding barrel 1 between the baffle 251 and the vertical plate 242, one end of the honeycomb duct 26 far away from the flotation feeding barrel 1 is communicated with the clean coal magnetic separation tailing barrel in the step a, so that the honeycomb duct 26 can guide coarse particles obtained by screening, the coarse particles are screened again in the step a, the coarse particles are prevented from entering the flotation machine, and waste caused by the fact that the flotation machine cannot recover the coarse particles is avoided.
As shown in fig. 2, the side of the baffle 251 and the vertical plate 242 away from each other is respectively provided with a discharge pipe 27 and a guide pipe 28 fixedly connected with the lower surface of the flotation feeding barrel 1, and the guide pipe 28 and the discharge pipe 27 are connected with each other, so that the fine particles screened out can be guided to flow into the flotation machine and are recovered by the flotation machine; the bottom surfaces of three parts of the flotation feeding barrel 1 divided by the vertical plate 242 and the baffle 251 are all arranged in a conical shape, and the guide pipe 26, the discharge pipe 27 and the guide pipe 28 are all connected with the lowest point of the bottom surface of the flotation feeding barrel 1, so that coarse particles and fine particles remained on the bottom surface of the flotation feeding barrel 1 are reduced.
As shown in fig. 1 and 2, the upper surfaces of the screening net 23, the primary screening net 24 and the screening net 25 are all plated with a layer of chromium, so that the smoothness of the upper surfaces of the screening net 23, the primary screening net 24 and the screening net 25 can be increased, the friction force is reduced, the upper surfaces of the screening net 23, the primary screening net 24 and the screening net 25 can slide better by coarse particles, and the probability that the coarse particles are clamped on the upper surfaces of the screening net 23, the primary screening net 24 and the screening net 25 is reduced.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. A process for treating the water screened by a desliming screen is characterized in that: the method comprises the following steps:
a. screening: firstly, removing media by a medium removing sieve, then sieving by a magnetic separator, and feeding the bottom flow into a clean coal water cyclone group;
TBS screening: coal slime below a raw coal desliming screen is sorted by a TBS concentrate water cyclone group and sent into a desliming screen;
c. flotation charging barrel (1) for distributing materials: after the desliming sieve is screened, the screened water enters a flotation charging bucket (1), and the screened water is divided by the flotation charging bucket (1).
2. The process of claim 1 for treating the water from the desliming screen, wherein the process comprises the following steps: in the step a, the magnetic separator is screened and then enters a clean coal magnetic separation tailing bucket, and the clean coal water is pumped into a clean coal water swirler group through a water pump.
3. The process of claim 2 for treating the water from the desliming screen, wherein the process comprises the following steps: the floating separation charging bucket (1) is provided with a material distribution component (2), and the material distribution component (2) can distribute the screened water.
4. The process of claim 3, wherein the process comprises the following steps: the material distribution assembly (2) comprises a return pipe (22) connected with the flotation feeding barrel (1) and a material guide pipe (21) connected with the return pipe (22), and one end, far away from the material guide pipe (21), of the return pipe (22) can be connected with a feeding hole of the clean coal tailings dressing barrel;
one end of the material guide pipe (21) is fixedly connected with the radian part on the return pipe (22), the other end of the material guide pipe (21) is communicated with the flotation machine, a screening net (23) is also fixedly connected in the return pipe (22), and the screening net (23) is positioned at the radian part of the return pipe (22) and shields the connection part of the material guide pipe (21) and the return pipe (22).
5. The process of claim 4, wherein the process comprises the following steps: the screening net (23) is arranged in an arc shape.
6. The process of claim 3, wherein the process comprises the following steps: the material distribution assembly (2) comprises a screening net (25) arranged in the flotation charging barrel (1), the screening net (25) is obliquely arranged, and a vertical baffle (251) is fixedly connected to the oblique lower end of the screening net (25);
the bottom surface of the flotation charging bucket (1) is respectively and fixedly connected with a discharging pipe (27) and a flow guide pipe (26), the discharging pipe (27) is connected with the bottom surface of the flotation charging bucket (1) below the sieving net (25), and the flow guide pipe (26) is connected to one side, away from the discharging pipe (27), of the baffle plate (251).
7. The process of claim 6, wherein the process comprises the following steps: a primary screen (24) is arranged above the screening net (25), the primary screen (24) is also obliquely arranged and is opposite to the oblique direction of the screening net (25), and screened water directly falls on the screening net (25) after flowing down from the primary screen (24);
an inclined guide plate (241) is fixedly connected to the inclined lower end of the primary separation net (24), the inclined direction of the guide plate (241) is the same as the inclined direction of the screening net (25), a vertical plate (242) is fixedly connected to one end, far away from the primary separation net (24), of the guide plate (241), and the lower end of the vertical plate (242) is fixedly connected with the bottom surface of the flotation charging bucket (1);
the bottom surface of the flotation charging bucket (1) between the discharging pipe (27) and the vertical plate (242) and the baffle plate (251) is fixedly connected, the vertical plate (242) is far away from the bottom surface of the flotation charging bucket (1) on one side of the baffle plate (251) and is fixedly connected with a guide pipe (28), and one end, far away from the flotation charging bucket (1), of the guide pipe (28) is communicated with the guide pipe (26).
8. The process of claim 7, wherein the process comprises the following steps: the upper surfaces of the screening net (25) and the primary selection net (24) are plated with a layer of chromium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911072484.XA CN111013808A (en) | 2019-11-05 | 2019-11-05 | Process for treating screen water of desliming screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911072484.XA CN111013808A (en) | 2019-11-05 | 2019-11-05 | Process for treating screen water of desliming screen |
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| CN111013808A true CN111013808A (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911072484.XA Pending CN111013808A (en) | 2019-11-05 | 2019-11-05 | Process for treating screen water of desliming screen |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4477338A (en) * | 1981-03-09 | 1984-10-16 | Ruhrkohle Aktiengesellschaft | Method and apparatus for processing high-ash coal slurries by flotation, particularly for processing gas coal and open-burning coal which are difficult to float |
| CN202238635U (en) * | 2011-09-28 | 2012-05-30 | 左同仑 | Reciprocating or vibrating type screen box |
| 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 |
| CN109967226A (en) * | 2019-05-05 | 2019-07-05 | 介休市鑫畅远洗煤技术推广服务有限公司 | A kind of recoverying and utilizing method of fine cleaned coal |
-
2019
- 2019-11-05 CN CN201911072484.XA patent/CN111013808A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4477338A (en) * | 1981-03-09 | 1984-10-16 | Ruhrkohle Aktiengesellschaft | Method and apparatus for processing high-ash coal slurries by flotation, particularly for processing gas coal and open-burning coal which are difficult to float |
| CN202238635U (en) * | 2011-09-28 | 2012-05-30 | 左同仑 | Reciprocating or vibrating type screen box |
| 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 |
| CN109967226A (en) * | 2019-05-05 | 2019-07-05 | 介休市鑫畅远洗煤技术推广服务有限公司 | A kind of recoverying and utilizing method of fine cleaned coal |
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Effective date of abandoning: 20220819 |