CN209997781U - Coarse coal slime dense medium sorting system - Google Patents
Coarse coal slime dense medium sorting system Download PDFInfo
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- CN209997781U CN209997781U CN201920668446.XU CN201920668446U CN209997781U CN 209997781 U CN209997781 U CN 209997781U CN 201920668446 U CN201920668446 U CN 201920668446U CN 209997781 U CN209997781 U CN 209997781U
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- 239000003245 coal Substances 0.000 title claims abstract description 376
- 239000006148 magnetic separator Substances 0.000 claims abstract description 83
- 238000005188 flotation Methods 0.000 claims description 50
- 238000000926 separation method Methods 0.000 claims description 41
- 238000002156 mixing Methods 0.000 claims description 28
- 239000003250 coal slurry Substances 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 22
- 239000000725 suspension Substances 0.000 abstract description 7
- 230000005389 magnetism Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 18
- 238000007885 magnetic separation Methods 0.000 description 16
- 239000010419 fine particle Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 239000011362 coarse particle Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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Abstract
The utility model relates to a kinds of coal washout processing field, especially kinds of coarse coal slime dense medium sorting system, clean coal descale screen underflow export and middlings descale screen underflow export respectively with the magnetic separator entry linkage that mixes, the magnetic separator overflow export that mixes is connected with qualified medium bucket of coal slime and the qualified medium bucket of raw coal respectively, the magnetic separator underflow export that mixes is connected with magnetic separator tailings classification equipment that mixes, the qualified medium bucket of coal slime is connected with coal slime dense medium swirler, pressure sensor, density sensor and the magnetic sensor of installation carry out on-line measuring on the pipeline, the water valve of the qualified medium bucket of control coal slime is with the aperture of adding medium valve , realize the automatic control of density, the aperture that contains the reason through magnetism thing sensor data control governing system coal slime, realize the automatic control of suspension viscosity, through the automatic control of control system to selecting separately the parameter, the high-precision of coal slime dense medium sorting has been realized.
Description
Technical Field
The utility model relates to a processing field is selected in kinds of coal washing, especially kinds of coarse coal mud dense medium sorting system.
Background
China is the current big coal-producing nation of in the world, according to statistics, the yield of coal in 2017 in China is 35.5 hundred million tons, which accounts for 60.4% of times of energy consumption, and in a relatively long period of , the coal is also the main energy pattern of coal, the natural endowment of coal resources in China is poor, the storage capacity of low-quality coal is large, which accounts for about 40%, ultra-low ash coal with ash content less than 10% only accounts for 15% -20% of the preserved storage capacity, and medium-high sulfur coal with sulfur content more than 1% accounts for 33% of the total amount, coal makes a great contribution to the economic development of China, and simultaneously brings serious environmental pollution, 1100 ten thousand tons of smoke and dust are discharged in SO2 in 2016, wherein the discharge caused by coal accounts for 85% and 70%, SO the clean utilization of coal has important significance on environmental protection, while the washing of coal is the clean utilization of coal, most of ash content and sulfur content in coal can be removed by washing, and the smoke dust and SO can be greatly reduced after combustion, and the smoke dust and SO can be greatly2And (5) discharging. The raw coal entering rate of China in 2017 reaches 70.2%.
The dense medium coal separation technology, especially the dense medium cyclone coal separation technology, has the characteristics of high separation precision, high clean coal recovery rate, high desulfurization and ash reduction efficiency and the like, and is applied to the construction of coal separation plants by fast pushing .
The -type process of heavy medium coal separation plant is that 80 (50) -0.5mm of slack coal is separated by a heavy medium separator, 0.5-0mm of coal slime is separated by flotation, heavy medium separation (gravity separation for short) is separation by using density difference of minerals, the separation precision is high, the flotation is separation according to different mineral surface properties, the separation precision is low, the surface properties of the minerals are adjusted by a collecting and foaming agent, the production cost is much higher than that of heavy medium separation, therefore, the gravity separation proportion is increased, the flotation separation proportion is reduced, namely, the reduction of the gravity separation particle size lower limit becomes the key direction of innovation of the coal separation process.
Introduction of the traditional process:
as shown in fig. 1, the following is illustrated:
cleaned coal and suspension liquid from a cleaned coal collecting box of a raw coal heavy medium cyclone enter qualified medium removing equipment (1) to remove most of qualified medium, oversize products of the qualified medium removing equipment (1) enter a cleaned coal medium removing sieve (2) to remove steps of the remaining qualified medium, the medium adhered to the cleaned coal is washed away by water spraying, part of screen water of the qualified medium removing equipment (1) enters a raw coal qualified medium barrel (11), part enters a splitter (3), the qualified medium with proper amount is split to a coal slime qualified medium barrel (4) according to the content of the coal slime of the selected raw coal, the qualified medium coal slime heavy medium cyclone (6) is used for separating cleaned coal slime and middling sludge, the cleaned coal slime and medium in overflow enter a cleaned coal magnetic separator (7) to remove the middling sludge, tailings enter a grading equipment (12), the coarse particle material of the grading equipment (12) enters a cleaned coal slime dewatering system for recycling, fine particle materials enter a flotation system for flotation of the cleaned coal slime and middling particles enter a coal flotation system (13), and the coal slime classification water enters a magnetic separation system (13) for grading materials of the coal slime and middling particles in a flotation system, and the coal slime classification equipment (13).
The middlings and suspension liquid from a middling collecting box of a raw coal dense medium cyclone enter qualified medium removing equipment (9) to remove most of qualified medium, oversize products of the qualified medium removing equipment (9) enter a middling medium removing sieve (10) to remove steps of residual qualified medium, the medium adhered to the middlings is washed away by water spraying, and screen water of the qualified medium removing equipment (9) enters a raw coal qualified medium barrel (11).
The dilute medium under the screen of the clean coal medium removing screen (2) enters a clean coal magnetic separator (7) for medium removal, and the dilute medium under the screen of the medium coal medium removing screen (10) enters a medium coal magnetic separator (8) for medium removal.
The process has the defect that only the coal slime in the qualified medium is subjected to heavy medium separation of the coal slime, but the coal slime in the dilute medium under the medium removal sieve is not subjected to heavy medium separation of the coal slime, so that the ash content of coarse coal slime is higher under the condition of the same classification granularity. In order to ensure that the ash content of the coarse clean coal is qualified, the classification granularity of the coarse coal slime is required to be improved, and the ash content of the coarse coal slime is reduced, so that the granularity of flotation is improved, the feeding amount of the flotation is increased, the separation precision is reduced, and the processing cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at carrying out technical innovation on the basis of the existing coal preparation process, providing simple and high-efficient coarse coal slime dense medium separation systems of the dense medium coal preparation plant.
Realize above-mentioned utility model purpose the utility model discloses a following technical scheme:
scheme :
coarse coal slurry heavy medium sorting system comprises a fine coal qualified medium removing device, a medium coal slurry qualified medium removing device, a fine coal medium removing sieve, a medium coal medium removing sieve, a flow divider, a raw coal qualified medium barrel, a coal slurry heavy medium cyclone, a medium coal magnetic separator , a fine coal magnetic separator and a coal slurry qualified medium pump, wherein an overflow outlet of the fine coal qualified medium removing device is connected with the fine coal medium removing sieve, a bottom flow outlet of the fine coal qualified medium removing device is connected with the flow divider, an overflow outlet of the medium coal qualified medium removing device is connected with the medium coal medium removing sieve, a bottom flow outlet of the medium coal qualified medium removing device is connected with the raw coal qualified medium barrel, a bottom flow outlet of the fine coal medium removing sieve and a bottom flow outlet of the medium coal medium removing sieve are respectively connected with an inlet of a coal mixing magnetic separator, outlets of the coal mixing machine are respectively connected with the coal slurry qualified medium barrel and the raw coal qualified medium barrel, a bottom flow outlet of the coal mixing machine is connected with a tailing grading device, an upper screen material inlet of the coal mixing machine is connected with the magnetic separator, a bottom flow outlet of the coal slurry qualified medium barrel is connected with a flotation separator, a coal slurry grading device is connected with the raw coal slurry qualified medium barrel, and a coal slurry grading device is connected with a flotation grading device, and a coal.
The preferred embodiment of embodiment is:
the flow divider is connected with the magnetic separator of the coal-mixed dilute medium through a pipeline, and an adjusting control valve is arranged on the pipeline.
The qualified medium removing equipment for clean coal and the qualified medium removing equipment for middlings adopt an arc-shaped sieve structure or a single -angle fixed sieve structure.
The grading equipment is an arc sieve structure or a hydraulic grading swirler, and the grading particle size range of the grading equipment is 0.075 mm-0.2 mm.
The coal slime dense medium cyclone adopts a two-product dense medium cyclone or a three-product dense medium cyclone.
And a pressure sensor, a density sensor and a magnetic substance sensor are arranged on a pipeline for connecting the qualified coal slime medium barrel and the swirler.
The qualified medium barrel of the coal slime is connected with the qualified medium pump of the coal slime, and the qualified medium pump of the coal slime is connected with the dense medium cyclone of the coal slime.
A liquid level meter is arranged on the qualified coal slime medium barrel.
Scheme II:
coarse coal slurry heavy medium sorting system comprises a fine coal qualified medium removing device, a medium coal slurry qualified medium removing device, a fine coal medium removing sieve, a medium coal medium removing sieve, a flow divider, a raw coal qualified medium barrel, a coal slurry heavy medium cyclone, a medium coal magnetic separator , a medium coal magnetic separator II, a fine coal magnetic separator , a fine coal magnetic separator II and a coal slurry qualified medium pump, wherein an overflow outlet of the fine coal qualified medium removing device is connected with the fine coal medium removing sieve, an underflow outlet of the fine coal qualified medium removing device is connected with an inlet of the flow divider, an outlet of the flow divider is connected with the raw coal qualified medium barrel and the coal slurry qualified medium barrel respectively, an overflow outlet of the medium coal qualified medium removing device is connected with the medium removing sieve, a underflow outlet of the medium coal qualified medium removing device is connected with the raw coal qualified medium barrel, a underflow screen underflow outlet of the fine coal qualified medium removing sieve is connected with the fine coal magnetic separator II, an outlet of the fine coal qualified medium coal classifying magnetic separator II is connected with the raw coal qualified medium barrel and the fine coal slurry qualified medium flotation tank, an overflow outlet of the fine coal magnetic separator is connected with the fine coal slurry qualified medium classifying system, an overflow tank and a fine coal slurry overflow tank.
The preferable scheme of the second scheme is as follows:
the qualified coal slime medium barrel is connected with the heavy coal slime medium cyclone through a qualified coal slime medium pump.
The separation method of the coarse slime dense medium separation system adopts the technical scheme that:
the automatic control system is adopted to automatically control the sorting process, a pressure sensor, a density sensor and a magnetic sensor which are arranged on a pipeline from a coal slime qualified medium barrel to a coal slime heavy medium cyclone are used for carrying out online detection on the feeding material of the coal slime heavy medium cyclone, a liquid level meter on the coal slime qualified medium barrel is used for automatically controlling sorting parameters according to sensor data, the control system controls the rotating speed of a coal slime qualified medium pump through a variable frequency speed regulator according to pressure and data fed back by the liquid level meter so as to realize the automatic control of the liquid level, the system controls the water feeding valve of the coal slime qualified medium barrel through the data of the density sensor so as to realize the automatic control of the density through the opening of a medium feeding valve , the regulating system is controlled through the data of the magnetic sensor so as to realize the automatic control of the viscosity of a suspension liquid, and the automatic control of the sorting parameters is realized through the control system so as to realize the high-precision sorting of the coal slime heavy medium.
Drawings
Fig. 1 is a schematic view of a prior art structure.
FIG. 2 is a schematic structural view of embodiment 1.
FIG. 3 is a schematic structural view of embodiment 2.
In the figure, the device comprises a clean coal qualified medium removing device 1, a clean coal medium removing sieve 2, a flow divider 3, a coal slime qualified medium barrel 4, a coal slime qualified medium pump 5, a coal slime dense medium cyclone 6, a clean coal magnetic separator 7, a middlings magnetic separator II 8, a middlings qualified medium removing device 9, a middlings medium removing sieve 10, a raw coal qualified medium barrel 11, a clean coal magnetic separation tailing grading device 12, a middlings magnetic separator tailing grading device 13, a coal blending magnetic separator 14, a coal blending magnetic separator tailing grading device 15, a middlings magnetic separator II 16, a middlings grading device 17, a clean coal grading device 18, a clean coal magnetic separator II 19, an adjusting control valve 20, a medium adding valve 21 and a water adding valve 22.
Detailed Description
The utility model discloses a detailed description of below with accompanying drawings and embodiment:
example 1:
referring to the attached figure 2, the qualified clean coal medium removing device 1, the clean coal medium removing sieve 2, the flow divider 3, the qualified coal slurry medium barrel 4, the qualified coal slurry medium pump 5, the coal slurry dense medium cyclone 6, the clean coal magnetic separator 7, the middlings magnetic separator 8, the qualified middlings medium removing device 9, the middlings medium removing sieve 10, the qualified raw coal medium barrel 11, the clean coal magnetic separator tailings grading device 12, the middlings magnetic separator tailings grading device 13, the coal blending magnetic separator 14, the coal blending magnetic separator tailings grading device 15 and the regulating control valve 20.
In the embodiment, an overflow outlet of coarse coal slime dense medium separation systems is connected with a clean coal medium removal sieve 2 through a pipeline, an underflow outlet of the clean coal qualified medium removal equipment 1 is connected with a splitter 3 through a pipeline, an overflow outlet of the medium coal qualified medium removal equipment 9 is connected with a medium coal medium removal sieve 10 through a pipeline, a bottom flow outlet of the medium coal qualified medium removal equipment 9 is connected with a raw coal qualified medium barrel through a pipeline, a bottom flow outlet of the clean coal medium removal sieve 2 is connected with an inlet of a coal blending magnetic separator 14 through a material collecting box and a pipeline, a bottom flow outlet of the medium coal blending medium removal sieve 10 is connected with an inlet 14 of a coal blending magnetic separator through a material collecting box, an overflow outlet of the coal blending magnetic separator 14 is connected with a coal slime qualified medium barrel 4 and a raw coal qualified medium barrel 11 through a pipeline, a bottom flow outlet of the coal blending magnetic separator 14 is connected with a coal blending magnetic separator 15 through a pipeline, an upper sieve of the coal blending magnetic separator 15 is connected with a qualified medium barrel 4 through a coal slime qualified medium barrel, a tailing grading device 15 is connected with a flotation coal flotation magnetic separator tail mine flotation system, a dry coal flotation screen is connected with a dry coal flotation screen 6 through a dry coal flotation screen 6 and a dry coal flotation screen 6 through a dry coal slime classification chute 6, a dry coal flotation screen is connected with a dry coal flotation screen 6 and a dry coal flotation screen 6 through a dry coal flotation screen chute 6 and a dry coal flotation screen chute 6, and a dry coal flotation screen overflow outlet of the coal flotation screen, a dry coal flotation screen 6 through a dry coal flotation screen, a dry coal flotation screen chute 6 and a dry coal flotation screen are connected with a dry coal flotation screen 6 through a dry coal flotation screen.
An underflow outlet of the middlings magnetic separator 8 is connected with the middlings magnetic separator tailings classification equipment 13 through a pipeline, an overflow outlet of the middlings magnetic separator tailings classification equipment 13 is connected with a middlings dewatering system through a pipeline, and an underflow removing flotation system or a slime water system of the middlings magnetic separator tailings classification equipment 13 is connected with a middlings flotation system or a slime water system.
The overflow of the cleaned coal magnetic separator 7 can be connected with the qualified medium barrel 4 of coal slime through a pipeline, and the overflow of the middlings magnetic separator 8 is connected with the qualified medium barrel 4 of coal slime through a pipeline.
The flow divider 3 is connected with the coal mixing magnetic separator 14 through a pipeline, and an adjusting control valve 20 is arranged on the pipeline and is used for controlling the viscosity of a separation medium and ensuring the high-efficiency separation of the coal slime dense medium cyclone 6.
The qualified medium removing equipment 1 for clean coal and the qualified medium removing equipment 9 for medium for coal are selected from curved sieve structure or single angle fixed sieve structure, the medium for mixing and magnetic separator 14 for recovering magnetic substance for medium.
The tailing grading equipment 15 of the coal mixing magnetic separator is an arc sieve structure or a hydraulic grading swirler, and the grading particle size range of the grading equipment is 0.075 mm-0.2 mm.
The coal slime dense medium cyclone 6 adopts a two-product dense medium cyclone or a three-product dense medium cyclone. And a pressure sensor, a density sensor and a magnetic substance sensor are arranged on a pipeline for connecting the qualified coal slime medium barrel 4 with the heavy coal slime medium cyclone 6.
The qualified medium barrel 4 of coal slime is connected with the qualified medium pump 5 of coal slime, and the qualified medium pump 5 of coal slime is connected with the heavy medium swirler 6 of coal slime.
The qualified coal slime medium barrel 4 is provided with a liquid level meter and a water replenishing port.
Cleaned coal and suspension liquid from a cleaned coal collection box of a raw coal heavy medium cyclone enter a cleaned coal qualified medium removing device 1 to remove most (80-90%) of qualified medium, oversize products of the cleaned coal qualified medium removing device 1 enter a cleaned coal medium removing screen 2 to remove steps of the remaining qualified medium, the medium adhered to the cleaned coal is washed away by water spraying, a part of screened water of the cleaned coal qualified medium removing device 1 enters a raw coal qualified medium barrel 11, another part enters a splitter 3, a proper amount (about 20-50% of the mass ratio) of the qualified medium is split to a coal slime qualified medium barrel 4 according to the content of the coal slime of the selected raw coal, the qualified medium is pumped into a coal slime heavy medium cyclone 6 through a coal slime qualified medium pump 5 to separate cleaned coal and medium slime, the cleaned coal slime and the medium in overflow enter a cleaned coal magnetic separator 7 for medium removal, cleaned coal magnetic separation tailings enter a grading device 12, coarse particle magnetic separation materials of the cleaned coal tailings grade device 12 enter a cleaned coal slime product, and fine particle flotation separation is carried out.
Medium coal slime and media in the bottom flow of the coal slime dense medium cyclone 6 enter a medium coal magnetic separator 8 for medium removal, medium coal magnetic separation tailings enter a medium coal magnetic separation tailing grading device 13, coarse particle materials of the medium coal magnetic separation tailing grading device 13 enter a medium coal slime dewatering system to be recycled as medium coal products, and fine particle materials of the medium coal magnetic separation tailing grading device 13 enter a flotation system or a coal slime water system.
The middlings and the suspension liquid from the middlings collecting box of the raw coal dense medium cyclone enter a middlings qualified medium removing device 9 to remove most of qualified media, materials on a screen of the middlings qualified medium removing device 9 enter a middlings medium removing screen 10 to remove steps of remaining qualified media, media adhered to the middlings are washed away by water spraying, and screen water of the qualified medium removing device 9 enters a raw coal qualified medium barrel 11.
The undersize dilute medium of the clean coal slime medium removing sieve 2 is mixed with the undersize dilute medium of the middling medium removing sieve 10, then the medium is removed through a coal mixing magnetic separator 14, magnetic separation tailings are classified through a coal mixing magnetic separator tailing classification device 15 according to the required granularity, coarse coal slime (the granularity is and is 0.5-0.075 mm) enters a coal slime qualified medium barrel 4 through a chute or a pipeline and is driven into a coal slime dense medium cyclone 6 together with part of the clean coal qualified medium overflowing to the coal slime qualified medium barrel from the coal mixing magnetic separator 14 to perform coarse coal slime separation, so that the coarse coal slime in the dilute medium part which is not effectively separated in the traditional process is efficiently separated, and the lower limit of the dense medium separation granularity is reduced to 0.075 mm.
According to the statistical result, the flotation feed amount can be reduced by 30-40%, the processing cost per ton of raw coal can be reduced by 0.9-1.4 yuan in terms of the selected raw coal, and the processing cost can be reduced by 270-420 yuan per year by adopting the technical scheme according to the calculation of 300 ten thousand tons per year of a coal preparation plant. Meanwhile, the separation efficiency of the heavy medium system is higher than that of a flotation system, the yield of clean coal can be improved by 0.5-1%, and the profit of 300 ten thousand tons per year in a coal preparation plant can be increased by 1200-2400 ten thousand yuan each year. Therefore, the technical scheme not only improves the economic benefit of the coal preparation plant, but also improves the utilization rate of coal resources.
The separation density of the coal slime dense-medium system is determined according to the properties of the coal slime. When the density is unqualified, water can be added into the qualified coal slime medium barrel according to the requirement to reduce the medium density, or partial medium is shunted from the concentrate of the clean coal magnetic separator to improve the medium density.
Example two:
in the figure, a clean coal qualified medium removing device 1, a clean coal medium removing sieve 2, a flow divider 3, a coal slime qualified medium barrel 4, a coal slime qualified medium pump 5, a coal slime dense medium cyclone 6, a clean coal magnetic separator 7, a middlings magnetic separator II 8, a middlings qualified medium removing device 9, a middlings medium removing sieve 10, a raw coal qualified medium barrel 11, a clean coal magnetic separation tailing grading device 12, a middlings magnetic separator tailing grading device 13, a middlings magnetic separator II 16, a middlings grading device 17, a clean coal grading device 18, a clean coal magnetic separator II 19 and an adjusting control valve 20.
The differences from the embodiment are:
an overflow outlet of the qualified clean coal medium removal equipment 1 is connected with a clean coal medium removal sieve 2, an underflow outlet of the qualified clean coal medium removal equipment 1 is connected with an inlet of a splitter 3, and an outlet of the splitter 3 is respectively connected with a qualified raw coal medium barrel 11 and a qualified coal slime medium barrel 4; the qualified coal slime medium barrel 4 is connected with the heavy coal slime medium cyclone 6 through a qualified coal slime medium pump 5.
An overflow outlet of the qualified clean coal medium removal equipment 1 is connected with a clean coal medium removal sieve 2, an underflow outlet of the qualified clean coal medium removal equipment 1 is connected with an inlet of a splitter 3, and an outlet of the splitter 3 is respectively connected with a qualified raw coal medium barrel 11 and a qualified coal slime medium barrel 4; an overflow outlet of the qualified medium removing equipment for middlings 9 is connected with a middlings medium removing sieve 10, and a raw qualified medium barrel 11 of raw coals at an underflow outlet of the qualified medium removing equipment for middlings 1 is connected; an underflow outlet of the clean coal medium-removing screen 2 is connected with a clean coal magnetic separator II 19 through a material collecting box and a pipeline, an overflow outlet of the clean coal magnetic separator II 19 is respectively connected with a raw coal qualified medium barrel 11 and a coal slime qualified medium barrel 4, and an overflow outlet of the middling magnetic separator II 16 is respectively connected with the raw coal qualified medium barrel 11 and the coal slime qualified medium barrel 4.
The underflow of the second clean coal magnetic separator 19 is connected with the clean coal grading equipment 18, the overflow of the clean coal grading equipment 18 is connected with the qualified coal slime medium barrel 4, and the underflow of the clean coal grading equipment 18 is connected with a clean coal slime flotation system or a coal slime water system.
The underflow outlet of the middling medium removing screen 10 is connected with a middling magnetic separator II 16 through a material collecting box and a pipeline, the underflow outlet of the middling magnetic separator II 16 is connected with middling classification equipment 17, and the overflow outlet of the middling classification equipment 17 is connected with a coal slime qualified medium barrel 4.
The underflow outlet of the middling classification equipment 17 is connected with a middling sludge flotation system; an overflow outlet of the middling classification equipment 17 is connected with the qualified coal slime medium barrel 4; the qualified coal slime medium barrel 4 is connected with the coal slime dense medium cyclone 6.
An underflow outlet of the coal slime dense medium cyclone 6 is connected with a middling magnetic separator 8, an underflow outlet of a clean coal magnetic separator 7 is connected with a clean coal magnetic separation tailing grading device 12, an overflow outlet of the clean coal magnetic separation tailing grading device 12 is connected with a clean coal slime dewatering system, an underflow outlet of the clean coal magnetic separation tailing grading device 12 is connected with a flotation system, an underflow outlet of the middling magnetic separator 8 is connected with a middling magnetic separator tailing grading device 13, an overflow of the middling magnetic separation tailing grading device 13 is used for removing middling coal slime dewatering system, and an underflow of the middling magnetic separation tailing grading device 13 is used for removing flotation system to give up coal slime water system.
According to the second embodiment, the dilute medium under the screen of the clean coal medium removing screen 2 and the dilute medium under the screen of the medium removing screen 10 enter the respective dilute medium magnetic separators respectively: a second clean coal magnetic separator 19 and a middling magnetic separator 16; after the second tailings of the clean coal magnetic separator are graded by the clean coal grading equipment 18, coarse particle materials enter the coal slime qualified medium barrel 4, and fine particle materials enter the flotation system. After the tailings of the second middling magnetic separator 16 are classified by the middling classification equipment 17, coarse particle materials enter the qualified coal slime medium barrel 4, and fine particle materials can enter the flotation system and the coal slime water system according to the coal quality characteristics of the fine particle materials, so that the technical scheme is more flexible, and the requirements of coal quality change of a coal preparation plant can be fully met.
According to the required clean coal mud ash content, the separation density of the coal mud dense medium cyclone 6 needs to be adjusted, when the qualified medium density from the splitter 3 is higher than the required separation density, circulating water is supplemented into the coal mud qualified medium barrel 4, and when the qualified medium density from the splitter 3 is lower than the required separation density, high-density magnetic separation concentrate from the clean coal magnetic separator 7 is supplemented into the coal mud qualified medium barrel 4.
The utility model discloses an automatic control system carries out automatic control to the sorting process, install pressure sensor on the pipeline of the qualified medium bucket 4 of coal slime to coal slime heavy medium cyclone 6, density sensor, magnetism thing sensor carries out on-line measuring to the pan feeding of coal slime heavy medium cyclone 6, be equipped with the level gauge on the qualified medium bucket 4 of coal slime, control system is to sorting parameter automatic control according to sensor data, according to the data of pressure and level gauge feedback, the system passes through the rotational speed of the qualified medium pump 5 of frequency conversion speed regulator control coal slime, thereby realize the automatic control of liquid level, the system passes through density sensor data control water valve and adds the aperture of mediating valve , realize the automatic control of density, valve aperture through magnetism thing sensor data control governing system coal slime content, realize the automatic control of suspension viscosity, through the automatic control of control system to sorting parameter, the high accuracy of coal slime heavy medium sorting has been realized.
Claims (10)
- The system is characterized in that an overflow outlet of the qualified clean coal medium removal device is connected with the qualified clean coal medium screen, an underflow outlet of the qualified clean coal medium removal device is connected with the splitter, an overflow outlet of the qualified medium removal device is connected with the medium removal screen, an underflow outlet of the qualified medium removal device is connected with the qualified raw coal medium barrel, an underflow outlet of the medium removal screen and an underflow outlet of the medium removal screen are respectively connected with an inlet of the coal mixing magnetic separator, overflow outlets of the coal mixing magnetic separator are respectively connected with the qualified medium barrel and the qualified raw coal medium barrel, an overflow outlet of the coal mixing magnetic separator is connected with a tailing grading device of the coal mixing magnetic separator, an overflow outlet of the coal mixing magnetic separator is respectively connected with the qualified medium barrel and the qualified medium barrel of the coal slurry flotation, and a qualified medium discharge outlet of the coal mixing magnetic separator are respectively connected with a tailing grading device and a tailing grading barrel of the coal mixing magnetic separator.
- 2. The coarse coal slime dense medium separation system of claim 1, wherein the splitter is connected with the mixed coal dilute medium magnetic separator through a pipeline, and an adjusting control valve is arranged on the pipeline.
- 3. The coarse coal slime dense medium separation system of claim 1, wherein the qualified cleaned coal medium removing device and the qualified middling medium removing device are of a sieve bend structure or a single -degree fixed sieve structure.
- 4. The coarse coal slurry dense medium separation system of claim 1, characterized in that: the grading equipment is an arc sieve structure or a hydraulic grading swirler, and the grading particle size range of the grading equipment is 0.075 mm-0.2 mm.
- 5. The coarse coal slurry dense medium separation system of claim 1, characterized in that: the coal slime dense medium cyclone adopts a two-product dense medium cyclone or a three-product dense medium cyclone.
- 6. The coarse coal slurry dense medium separation system of claim 1, characterized in that: and a pressure sensor, a density sensor and a magnetic substance sensor are arranged on a pipeline for connecting the qualified coal slime medium barrel and the swirler.
- 7. The coarse coal slurry dense medium separation system of claim 1, characterized in that: the qualified medium barrel of the coal slime is connected with the qualified medium pump of the coal slime, and the qualified medium pump of the coal slime is connected with the dense medium cyclone of the coal slime.
- 8. The coarse coal slurry dense medium separation system of claim 1, characterized in that: a liquid level meter is arranged on the qualified coal slime medium barrel.
- The system is characterized in that an overflow outlet of the qualified medium removing device for the clean coal is connected with the clean coal medium removing sieve, an underflow outlet of the qualified medium removing device for the clean coal is connected with an inlet of the flow divider, an outlet of the flow divider is connected with the qualified medium barrel for the raw coal and is connected with the qualified medium barrel for the coal slime, an underflow outlet of the qualified medium removing device for the clean coal is connected with the qualified medium barrel for the coal slime, an overflow outlet of the qualified medium removing device for the medium coal is connected with the qualified medium barrel for the clean coal, an overflow outlet of the qualified medium removing device for the medium is connected with the qualified medium barrel for the clean coal, an underflow outlet of the qualified medium removing sieve for the clean coal is connected with the second medium barrel for the clean coal, an overflow outlet of the qualified medium coal flotation system for the clean coal is connected with the qualified medium barrel for the clean coal flotation of the medium, an overflow outlet of the qualified medium coal flotation system for the clean coal flotation of the clean coal and is connected with the qualified medium classifying system for the clean coal slime, and is connected with the overflow barrel for the clean coal flotation of the medium.
- 10. The coarse coal slurry dense media separation system of claim 9, characterized in that: the qualified coal slime medium barrel is connected with the heavy coal slime medium cyclone through a qualified coal slime medium pump.
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| CN201920668446.XU CN209997781U (en) | 2019-05-10 | 2019-05-10 | Coarse coal slime dense medium sorting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170371A (en) * | 2019-05-10 | 2019-08-27 | 唐山森普工程设计有限公司 | Coarse slime dense medium separation system and method for separating |
| CN116550466A (en) * | 2023-07-10 | 2023-08-08 | 山西品东智能控制有限公司 | Dense medium sorting intelligent control method, control system, equipment and medium |
-
2019
- 2019-05-10 CN CN201920668446.XU patent/CN209997781U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170371A (en) * | 2019-05-10 | 2019-08-27 | 唐山森普工程设计有限公司 | Coarse slime dense medium separation system and method for separating |
| CN110170371B (en) * | 2019-05-10 | 2023-11-24 | 唐山森普工程设计有限公司 | Coarse coal slime heavy medium sorting system and sorting method |
| CN116550466A (en) * | 2023-07-10 | 2023-08-08 | 山西品东智能控制有限公司 | Dense medium sorting intelligent control method, control system, equipment and medium |
| CN116550466B (en) * | 2023-07-10 | 2023-09-08 | 山西品东智能控制有限公司 | Dense medium sorting intelligent control method, control system, equipment and medium |
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