CN218222868U - Coal gangue critical separation system - Google Patents
Coal gangue critical separation system Download PDFInfo
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- CN218222868U CN218222868U CN202222574310.7U CN202222574310U CN218222868U CN 218222868 U CN218222868 U CN 218222868U CN 202222574310 U CN202222574310 U CN 202222574310U CN 218222868 U CN218222868 U CN 218222868U
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Abstract
The utility model provides a critical sorting system of gangue, include: the device comprises a vibration grading sieve, a mixing barrel, a mixing pump, a coal gangue critical separator, a first sieve bend, a second sieve bend, a gangue medium removing sieve, a product medium removing sieve and a magnetic separator; the coal gangue critical separator is formed by connecting two conical separators in series; the vibration grading sieve, the mixing barrel and the mixing pump are sequentially connected with the coal gangue critical separator; a gangue chute of the coal gangue critical classifier is sequentially connected with a first arc-shaped screen and a gangue medium removal screen; a product chute of the coal gangue critical classifier is sequentially connected with the second sieve bend and the product medium removing sieve; dilute medium outlets of the gangue medium removing sieve and the product medium removing sieve are connected with a magnetic separator; the mixing barrel is also respectively connected with the first sieve bend, the second sieve bend, the gangue medium removing sieve, the product medium removing sieve and the magnetic separator. The utility model provides a comprehensive reuse rate of current gangue low, the abandonment volume is big, retreatment needs the retreatment cost height that the independent factory built leads to, the long problem of recovery period.
Description
Technical Field
The utility model relates to a gangue separation technical field especially relates to a critical separation system of gangue.
Background
According to statistics, in the coal washing industry of China, 2000 million tons of coal gangue can be discharged every 1 million tons of coking coal are washed, 1500 million tons of coal gangue can be discharged every 1 million tons of power coal are washed, and the newly increased coal gangue production amount is about 6.5 million tons in recent years. The coal gangue can release various harmful gases due to the characteristic of easy spontaneous combustion of the coal gangue, and simultaneously generates a large amount of explosive smoke dust, thereby causing different degrees of influence on the surrounding atmospheric environment and the growth of animals and plants during spontaneous combustion. And the coal gangue, as a solid waste, can form a gangue dump after being stockpiled for a long time, and occupies a large amount of land resources. In addition, in the process of stacking the coal gangue, harmful elements in the coal gangue can be dissolved and enter a water body or a soil environment under the action of rainfall, certain damage is caused to nutrients in the soil, and soil around a gangue dump can be acidified in severe cases, so that the health of a human body and the growth of vegetation are influenced, and the ecological environment is polluted.
Because the existing coal separation technology has low precision, a large amount of recoverable coal resources still exist in the separated coal gangue, the research on the comprehensive utilization process of the coal gangue in China at the present stage is not deep enough, the existing technical scheme for reprocessing the coal gangue only comprises mine backfilling, brick making and power generation, and the coal gangue reprocessing technologies such as brick making and power generation need to be separately built, so that a large amount of capital investment is needed, the cost is high, and the recovery period is long. And when the coal gangue is used for making bricks and generating electricity, a large amount of secondary dust still exists, and the surrounding environment is easily polluted. The usage amount of the coal gangue which is reused by the treatment is only a small part, according to statistics, the reuse ratio of the coal gangue is only about 30 percent, and most of the residual coal gangue is still discarded. Therefore, the overall utilization level of the coal gangue is not high.
SUMMERY OF THE UTILITY MODEL
The utility model provides a critical sorting system of gangue for the comprehensive reuse rate of solving current gangue is low, and the abandonment volume is big, retreats the problem that the reprocessing cost is high, the recovery period is long that needs independent factory building to lead to.
The utility model provides a critical sorting system of gangue, include: the device comprises a vibration grading sieve, a mixing barrel, a mixing pump, a coal gangue critical separator, a first sieve bend, a second sieve bend, a gangue medium removing sieve, a product medium removing sieve and a magnetic separator; the coal gangue critical separator is formed by connecting two conical separators in series, and the critical separation density of the coal gangue critical separator is 2.1-2.2g/cm 3 。
Specifically, a gangue outlet of the vibration classifying screen is connected with a gangue inlet of the material mixing barrel, a waste gangue outlet of the vibration classifying screen sends waste gangue to a solid waste site through a pipeline, and the vibration classifying screen is used for screening out coal gangue with the granularity of-30 mm and sending the coal gangue into the material mixing barrel; the outlet of the mixing barrel is communicated with the inlet of the coal gangue critical classifier through a mixing pump.
Specifically, a gangue chute of the gangue critical classifier is connected with a first arc-shaped screen, a gangue outlet of the first arc-shaped screen is connected with a gangue medium removing screen, and a waste gangue outlet of the gangue medium removing screen sends waste gangue to a solid waste site through a pipeline; and a product chute of the coal gangue critical classifier is connected with a second sieve bend, a product outlet of the second sieve bend is connected with a product medium removing sieve, and a product outlet of the product medium removing sieve sends low-quality coal products to a product warehouse for storage through a pipeline.
Specifically, dilute medium outlets of the gangue medium removing sieve and the product medium removing sieve are connected with an inlet of a magnetic separator, and a tailing outlet of the magnetic separator is connected with a coal slime water treatment tank; and a medium inlet of the mixing barrel is respectively connected with a medium outlet of the first sieve bend and the second sieve bend, a qualified medium outlet of the gangue medium removing sieve and the product medium removing sieve, and a concentrate outlet of the magnetic separator.
Specifically, the mixing barrel is also provided with a replenishing port for replenishing media into the mixing barrel; the medium is magnetite powder.
Specifically, water spray inlets of the gangue media removing sieve and the product media removing sieve are communicated with a circulating water pipeline of the raw coal heavy medium sorting system through a pipeline.
Specifically, the gangue medium removing sieve and the product medium removing sieve have the same structure; the product medium removing sieve comprises a sieving frame, wherein the sieving frame is obliquely arranged, and a feeding groove communicated with the inside of the sieving frame is arranged at the top of the high end of the sieving frame.
Specifically, the bottom surface of the screening frame is a medium removing screen plate capable of vibrating up and down, and the medium removing screen plate is connected with a vibration providing device arranged outside the screening frame; the bottom mirror image that the screening frame is close to the one end of feed chute is provided with elevating gear, and the bottom mirror image that the screening frame kept away from the one end of feed chute is provided with fixing device.
Specifically, take off and be provided with the screen cloth on the sieve that situated between, take off the bottom fixedly connected with baffle of sieve that situated between, the baffle forms qualified medium storehouse and rare medium storehouse in the lower part space of taking off the sieve, and qualified medium storehouse is provided with qualified medium export, and rare medium storehouse is provided with rare medium export, and the one end that the feed chute was kept away from to the sieve that takes off situated between is provided with the product outlet.
Specifically, the screening frame is also provided with a spraying device, the spraying device comprises a diversion water pipe fixedly connected to the inner wall of the top of the screening frame, the diversion water pipe is communicated with a plurality of high-pressure nozzles, and the distance between the high-pressure nozzles and the screen is 200-400mm; the flow dividing water pipe is communicated with a circulating water pipeline of the raw coal dense medium separation system through a high-pressure pump; the sprinkler is arranged above the medium removing sieve plate corresponding to the dilute medium bin.
Specifically, the output end of the lifting device is connected with the bottom of the screening frame, and the lifting device is any one of an air cylinder, a hydraulic cylinder and an electric cylinder.
Specifically, the bottom surfaces of the dilute medium bin and the qualified medium bin are respectively arranged towards the dilute medium outlet and the qualified medium outlet in an inclined mode.
Specifically, a material baffle plate is vertically arranged on the screen along the material flowing direction, and the height of the material baffle plate is 20-40mm.
Specifically, a screen seam cleaning device is arranged on the bottom surface of the medium removing sieve plate and comprises stretching rods arranged at two ends of the medium removing sieve plate in the length direction in a mirror image mode, an installation rod is connected between output ends of the two stretching rods, bristles are fixedly connected to the surface of the installation rod, and the stretching rods are connected with a motor arranged outside the sieving frame; the brush hair is used for cleaning the screen seam of the screen on the medium removing screen plate, and the motion direction of the mounting rod is vertical to the direction of the screen seam.
The screen seam cleaning device comprises a screen seam cleaning device and a medium removing screen plate, wherein the screen seam cleaning device comprises a plurality of screen seam cleaning devices and a plurality of medium removing screen plates, and the screen seam cleaning devices are arranged on the screen seam cleaning device; the flushing water pipe is connected with the outlet of the high-pressure pump.
The utility model provides a critical sorting system of gangue establishes ties through two circular cone sorting machines and forms the technological means of the critical sorter of gangue, realizes following beneficial effect:
1) The utility model discloses mainly select out the inferior quality coal of calorific capacity at 1600-2200 big calorie to the critical separation once more of gangue after the heavy medium of the coal preparation plant of granularity-30 mm is selected separately, realize improving the comprehensive utilization ratio of gangue to the deep-processing of selecting separately the back gangue, realize changing waste into valuables, reduce the environmental protection purpose of energy consumption.
2) The utility model discloses only rely on the main wash system of the raw coal of coal preparation factory, need not build the factory alone, process flow is simple, and the fund input is few, and the low-grade coal product of branch electing can satisfy the user demand, is favorable to increasing the economic benefits of enterprise's coal washing, has solved the ecological environment problem of destruction that the gangue brought as solid waste discharges simultaneously. Simultaneously, also can utilize the utility model discloses a gangue washing and selecting factory is built alone.
3) The medium removing sieve in the utility model is improved according to the actual use condition, and the gradient of the medium removing sieve plate is adjusted through the lifting device, so that the medium removing sieve plate can be adjusted in time and adapted to different feeding working conditions, and the utilization rate of a sieve mesh and the medium removing efficiency are improved; the material baffle is arranged on the screen, so that the retention time and the screening time of the material on the screen are prolonged, the medium removing efficiency and the medium removing effect are improved, and the medium loss is reduced; through screen cut cleaning device, realize in time cleaning to taking off between sieve and screen cloth, avoid the phenomenon of debris caulking, prolong the life and the duty cycle of taking off between sieve and screen cloth greatly, improve the through-sieve and take off between efficiency, also reduced the dismouting and the change frequency of taking off between sieve and screen cloth simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a coal gangue critical separation system according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a medium removing screen according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a screen gap cleaning device according to an embodiment of the present invention.
Description of reference numerals:
1-vibration grading sieve, 2-mixing bucket, 3-mixing pump, 4-coal gangue critical separator, 5-first sieve bend, 6-second sieve bend, 7-gangue medium removing sieve, 8-product medium removing sieve, 9-magnetic separator, 81-screening frame, 82-feeding chute, 83-medium removing sieve plate, 84-vibration providing device, 85-lifting device, 86-fixing device, 87-clapboard, 88-qualified medium bin, 89-dilute medium bin, 831-screen, 832-product outlet, 833-baffle plate, 881-qualified medium outlet, 891-dilute medium outlet, 8101-shunt water pipe, 8102-high pressure spray head, 8103-high pressure pump, 8104-circulating water pipe, 8111-stretching rod, 8112-mounting rod, 8113-brush hair, 8114-motor, 8115-flushing water pipe and 8116-high pressure flushing head.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts also belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides a critical separation system of coal gangue, include: the device comprises a vibration grading sieve 1, a mixing barrel 2, a mixing pump 3, a coal gangue critical separator 4, a first sieve bend 5, a second sieve bend 6, a gangue medium removing sieve 7, a product medium removing sieve 8 and a magnetic separator 9; the coal gangue critical separator 4 is formed by connecting two conical separators in series, and the critical separation density of the coal gangue critical separator 4 is 2.1-2.2g/cm 3 。
Specifically, a waste rock outlet of the vibration classifying screen 1 is connected with a waste rock inlet of the mixing barrel 2, a waste rock outlet of the vibration classifying screen 1 sends waste rock to a solid waste site through a pipeline, and the vibration classifying screen 1 is used for screening out coal gangue with the granularity of-30 mm and sending the coal gangue into the mixing barrel 2; the outlet of the mixing barrel 2 is communicated with the inlet of the coal gangue critical classifier 4 through a mixing pump 3.
Specifically, a gangue chute of the gangue critical separator 4 is connected with a first arc-shaped screen 5, a gangue outlet of the first arc-shaped screen 5 is connected with a gangue medium removing screen 7, and a waste gangue outlet of the gangue medium removing screen 7 sends waste gangue to a solid waste site through a pipeline; the product chute of the coal gangue critical classifier 4 is connected with a second sieve bend 6, the product outlet of the second sieve bend 6 is connected with a product medium removing sieve 8, and the product outlet of the product medium removing sieve 8 sends low-quality coal products to a product warehouse for storage through a pipeline.
Specifically, dilute medium outlets of the gangue medium removing sieve 7 and the product medium removing sieve 8 are connected with an inlet of a magnetic separator 9, and a tailing outlet of the magnetic separator 9 is connected with a coal slime water treatment tank; the medium inlet of the mixing barrel 2 is respectively connected with the medium outlets of the first sieve bend 5 and the second sieve bend 6, the qualified medium outlets of the gangue medium removing sieve 7 and the product medium removing sieve 8, and the concentrate outlet of the magnetic separator 9.
The utility model discloses physical properties difference that the density of inferior coal and waste rock is different in the coal gangue, utilize dense medium to select separately the critical secondary separation that the theory realized the coal gangue, especially mainly be to granularity-30 mm's coal gangue, select separately once more through the coal gangue to granularity-30 mm, thereby the inferior coal product of calorific capacity at 1600-2200 big card is selected out to the branch, the comprehensive utilization of coal gangue has effectively been improved, reduce the abandonment emission of coal gangue, and do not need to build the factory alone, only rely on the main washing system of the raw coal of coal dressing plant, the process flow is simple, the fund input is few, the inferior coal product of selecting out can satisfy user's demand, the recovery period is short, it is fast to take effect, be favorable to increasing the economic benefits of enterprise's coal washing, the problem of ecological environment destruction that the coal gangue brought as solid waste discharges has been solved simultaneously.
Specifically, the mixing barrel 2 is also provided with a supplement port, and the supplement port is used for supplementing media into the mixing barrel 2; the medium is magnetite powder. The utility model discloses in, the qualified medium of screening through waste rock demedium sieve 7 and product demedium sieve 8 can directly be sent into and carry out recycling in compounding bucket 2, and the rare medium of screening also carries out recycling behind the magnetic separation of magnet separator 9, with the medium that magnetism was elected, but still has dielectric loss in the system operation, in order to guarantee the efficiency of selecting separately, need be according to the dielectric loss condition, in good time to adding the medium in the system.
And particularly, the water spraying inlets of the gangue medium removing sieve 7 and the product medium removing sieve 8 are communicated with a circulating water pipeline of the raw coal dense medium sorting system through pipelines. The circulating water that the dense medium of raw coal selected separately system was used to the screen that takes off the medium makes the utility model discloses a system relies on raw coal main wash system, but does not influence raw coal main wash system's overall arrangement and operation, has the environmental protection and practices thrift the effect of cost. Meanwhile, the water sprayed by the medium removing sieve can also be clean water and/or clean water of other working sections.
As shown in fig. 2, the gangue medium removing screen 7 and the product medium removing screen 8 have the same structure; product takes off medium sieve 8 includes screening frame 81, and screening frame 81 is the slope setting, is provided with the feed chute 82 with the inside intercommunication of screening frame 81 at the top of the high-end department of screening frame 81.
Specifically, the bottom surface of the screen frame 81 is a medium removing screen plate 83 capable of vibrating up and down, and the medium removing screen plate 83 is connected to a vibration providing device 84 provided outside the screen frame 81; the bottom mirror image of the end of the screening frame 81 close to the feed chute 82 is provided with a lifting device 85, and the bottom mirror image of the end of the screening frame 81 far from the feed chute 82 is provided with a fixing device 86.
Specifically, a screen mesh 831 is arranged on the medium removal sieve plate 83, a partition 87 is fixedly connected to the bottom of the medium removal sieve plate 83, the partition 87 forms a qualified medium bin 88 and a dilute medium bin 89 in the lower space of the medium removal sieve plate 83, the qualified medium bin 88 is provided with a qualified medium outlet 881, the dilute medium bin 89 is provided with a dilute medium outlet 891, and a product outlet 832 is arranged at one end, far away from the feed chute 82, of the medium removal sieve plate 83.
Specifically, a spraying device is further arranged on the screening frame 81, the spraying device comprises a diversion water pipe 8101 fixedly connected to the inner wall of the top of the screening frame 81, the diversion water pipe 8101 is communicated with a plurality of high-pressure nozzles 8102, and the distance between the high-pressure nozzles 8102 and the screen mesh 831 is 200-400mm; the flow dividing water pipe 8101 is communicated with a circulating water pipeline 8104 of the raw coal dense medium separation system through a high-pressure pump 8103; the sprinkler is arranged above the medium removing sieve plate 83 corresponding to the dilute medium bin 89.
Because gangue takes off medium sieve 7 and product and takes off the structure of medium sieve 8 the same, consequently the utility model discloses the product export 832 of product taking off medium sieve 8 of example is the waste rock export that gangue takes off medium sieve 7 promptly. The water spraying pressure of the high-pressure spray head 8102 of the spraying device is preferably 0.3-0.4MPa.
After the material was sieved through taking off the medium sieve, can separate qualified medium, rare medium and low-grade coal waste rock, the medium sieve that takes off of the fixed medium sieve 83 slope of current relatively, the utility model discloses a take off the medium sieve angle can adjust and change through elevating gear 85, under different pan feeding operating modes, through the slope of elevating gear 85 adjustment medium sieve 83 for the material can both fully with take off the screen cloth 831 contact on the medium sieve 83, take off the medium effectual, effectively alleviate follow-up equipment like the load of magnet separator 9.
The utility model provides a vibration provides device 84 includes vibrating motor, vibrator, reset spring etc. and can assist and take off the equipment that medium sieve 83 carried out reciprocal vibration from top to bottom, and this part is conventional prior art, and the skilled person in the art all knows, gives unnecessary details here.
The gradient of the existing medium removing sieve is often fixed, and cannot be adjusted according to the feeding condition (particle size, feeding speed and the like) of the material, or the material is easy to enter a dilute medium section before being removed as the movement speed of the material on a medium removing sieve plate 83 is too high, and the necessary time for removing the qualified medium cannot be ensured, so that the workload of the magnetic separator 9 is too heavy and the medium loss is too large; or easily cause the material movement speed to be too slow, the efficiency of medium removal is reduced, and the problems of time cost increase and low treatment capacity of the medium removal sieve are caused.
Therefore, the output end of the lifting device 85 is connected with the bottom of the sieving frame 81, and the lifting device 85 is any one of an air cylinder, a hydraulic cylinder and an electric cylinder. Through the cooperation of elevating gear 85 and fixing device 86 of screening frame 81 bottom, can in time adjust the inclination of taking off medium sieve 83 for taking off medium sieve 83 can in time adjust and adapt to different pan feeding operating modes, improved screen cloth 831 utilization ratio and take off the medium efficiency.
Specifically, the bottom surfaces of the lean medium bin 89 and the qualified medium bin 88 are inclined toward the lean medium outlet 891 and the qualified medium outlet 881, respectively. Through the bottom surface that the slope set up for qualified medium and rare medium can concentrate and pile up in the position that is close to the export, are convenient for derive qualified medium and rare medium in time, smoothly qualified medium storehouse 88 and rare medium storehouse 89.
As shown in fig. 2, a material blocking plate 833 is vertically arranged on the screen 831 along the material flowing direction, and the height of the material blocking plate 833 is 20-40mm. Plane screen mesh 831 that current takes off medium sieve to adopt receives equipment volume restriction, can't provide efficient efficiency of taking off medium when the handling capacity is great, consequently set up striker plate 833 on screen mesh 831, the material is when passing through striker plate 833, become the rolling mode of advancing that is favorable to the screening by unordered antecedent, the difference of thick and thin granule climbing ability of recycling, make medium and material granule separation in the material, the dwell time and the screening time of material on screen mesh 831 have still been prolonged simultaneously, make the medium that takes off of low-quality coal waste gangue more abundant, efficiency and the effect of taking off medium have been improved, also be favorable to reducing the dielectric loss.
As shown in fig. 3, specifically, a screen slot cleaning device is arranged on the bottom surface of the medium removing screen plate 83, the screen slot cleaning device includes stretching rods 8111 arranged at two ends of the medium removing screen plate 83 in the length direction in a mirror image manner, an installation rod 8112 is connected between output ends of the two stretching rods 8111, bristles 8113 are fixedly connected to the surface of the installation rod 8112, and the stretching rods 8111 are connected with a motor 8114 arranged outside the screen frame 81; the bristles 8113 are used for cleaning the screen gaps of the screen 831 on the medium removing screen plate 83, and the moving direction of the mounting rod 8112 is perpendicular to the direction of the screen gaps.
The two stretching rods 8111 drive the mounting rod 8112 and the bristles 8113 on the mounting rod 8112 to reciprocate on the bottom surface of the medium removing sieve plate 83, so that the medium removing sieve plate 83 and the screen mesh 831 can be cleaned in time, impurities in sieve seams can be effectively removed, the phenomenon of impurity blocking is avoided, the service lives and the working periods of the medium removing sieve plate 83 and the screen mesh 831 are greatly prolonged, the medium passing and removing efficiency of the sieve is improved, and the disassembly, assembly and replacement frequencies of the medium removing sieve plate 83 and the screen mesh 831 are reduced. The screen seam cleaning device is a detachable installation mode, is convenient to maintain, is convenient to timely remove and replace the brush bristles 8113, ensures the cleaning effect of the brush bristles 8113 on the screen 831, and ensures the medium removing effect of the medium removing screen on materials.
Specifically, the screen slot cleaning device further comprises flushing water pipes 8115 arranged on two sides of the medium removing screen plate 83 in the width direction in a mirror image manner, a plurality of high-pressure flushing heads 8116 are uniformly arranged on the flushing water pipes 8115, and the high-pressure flushing heads 8116 incline towards the direction of the screen mesh 831; and a flushing water pipe 8115 is connected with an outlet of the high-pressure pump 8103.
The setting of wash pipe 8115 and high-pressure flushing head 8116 can directly wash the screen cut of screen cloth 831 through the water under high pressure, further guarantees screen cut cleaning device's the effect of cleaning, also can in time wash brush hair 8113 simultaneously, has ensured brush hair 8113's cleanliness factor, has further ensured brush hair 8113 to the cleaning effect of screen cloth 831.
The coal gangue critical separation system specifically works, coal gangue separated by a main washing system of a coal preparation plant is classified by a vibrating classifying screen 1 with a screen hole of 30mm, undersize products with the granularity of-30 mm enter a material mixing barrel 2 through a gangue outlet of the vibrating classifying screen 1, and the coal gangue and qualified media are fully mixed in the material mixing barrel 2 and then are pumped into a coal gangue critical separator 4 formed by connecting two conical separators in series through a material mixing pump 3. In the coal gangue critical separator 4, the main functions of one section are concentration, separation and separation to separate out a small part of productsThe product can improve the density of two-stage separation, so that the material at the first-stage outlet can reach the critical separation density of low-quality coal and gangue calculated by theory, which is 2.1-2.2g/cm 3 And separating out coal-containing products and waste gangue in the second section.
The discarded waste rock that divides the election gets into 5 pre-dementions of first sieve bend through the gangue chute of gangue critical separation ware 4, the qualified medium that obtains sends into the medium import of compounding bucket 2 through its medium export, the useless waste rock that obtains sends into in the gangue dementions sieve 7 through its gangue export and carries out the secondary dementions and selects separately, the useless waste rock that finally selects is sent to solid waste through the pipeline from the waste rock export of gangue dementions sieve 7, qualified medium sends into the medium import of compounding bucket 2 through qualified medium export 881, the dilute medium sends into magnet separator 9 through dilute medium export 891.
The sorted coal-containing products enter a second sieve bend 6 through a product chute of a coal gangue critical sorter 4 for pre-medium removal, the obtained qualified media are sent into a medium inlet of a mixing barrel 2 through a medium outlet of the qualified media, the obtained coal-containing products are sent into a product medium removing sieve 8 through a product outlet of the coal gangue for secondary medium removal sorting, the finally screened low-quality coal products are sent to a product warehouse from a product outlet 832 of the product medium removing sieve 8 through a pipeline for storage, the qualified media are sent into a medium inlet of the mixing barrel 2 through a qualified medium outlet 881, and the dilute media are sent into a magnetic separator 9 through a dilute medium outlet 891.
The dilute medium of the gangue medium removing sieve 7 and the product medium removing sieve 8 flows into the magnetic separator 9 for direct magnetic separation, the obtained qualified medium flows into the mixing barrel 2 through the concentrate outlet of the magnetic separator 9, and the tailings of the magnetic separator 9 are sent into the coal slime water treatment tank through the tailing outlet. Qualified medium in the mixing barrel 2 is mixed with undersize products with the granularity of-30 mm separated by the vibration grading sieve 1, the medium is supplemented into the mixing barrel 2 through a supplement port if necessary, and the mixed material is sent into a coal gangue critical separator 4 by a mixing pump 3 for next round of critical separation. The utility model discloses a system relies on the main wash system that the heavy medium of raw coal was selected separately, and wherein takes off sprinkler and the coal slime water treatment pond of medium sieve and all be connected with the main wash system, works as the utility model discloses a production can stop production when the system breaks down in production to can not have any influence to the main system of selecting of raw coal.
The gangue medium removing sieve 7 and the product medium removing sieve 8 have the same structure, the work flow of the materials in the gangue medium removing sieve is the same, and the work flow in the product medium removing sieve 8 is taken as an example: the coal-containing product that second sieve bend 6 was pre-positioned and was obtained gets into the high-end department of screening frame 81 through feed chute 82, then along the upper and lower vibration that has a grade take off medium sieve 83 and screen mesh 831 downstream, the material is when the striker plate 833 on screen mesh 831, become the rolling forward mode that is favorable to the screening by unordered advancing, the difference of thick and thin granule climbing ability of recycling, medium and material granule separation in the material, under the screening of taking off medium sieve 83 and screen mesh 831, qualified medium in the coal-containing product gets into qualified medium storehouse 88 through the screen cut, finally send into compounding bucket 2 through qualified medium export 881.
The coal-containing product after the qualified medium is screened out continuously moves along the length direction of the medium removing sieve plate 83, the high-pressure pump 8103 is started, the circulating water in the circulating water pipeline 8104 of the raw coal heavy medium sorting system is conveyed to the diversion water pipe 8101, and then the circulating water is sprayed out through the plurality of high-pressure spray nozzles 8102, so that high-pressure water is sprayed to the coal-containing product, and the water spraying pressure of the high-pressure water is 0.3-0.4MPa. After the coal-containing product is washed by high-pressure water, the medium is carried into the dilute medium bin 89 by the high-pressure water and finally sent into the magnetic separator 9 through the dilute medium outlet 891. The washed media of the low quality coal product continues to move downwardly and exits the product screen 8 through a product outlet 832 at the end of the screen panel 83 remote from the feed chute 82.
When the feeding condition changes, such as particle size change, feeding speed change or processing capacity mutation, the gradient of the medium removing sieve plate 83 can be adjusted by adjusting the lifting device 85, so that the inclination angle of the medium removing sieve plate 83 can be adjusted in time, the medium removing sieve plate 83 can be adjusted in time and adapted to different feeding conditions, and the utilization rate of the screen 831 and the medium removing efficiency are improved.
When the screen mesh 831 needs to be cleaned, the motor 8114 is started, so that the two stretching rods 8111 are regularly and reciprocally stretched and contracted, the mounting rods 8112 and the bristles 8113 on the mounting rods 8112 are driven to reciprocate on the bottom surface of the medium removing screen plate 83, and the movement direction of the mounting rods 8112 is perpendicular to the direction of the screen slits, so that the medium removing screen plate 83 and the screen mesh 831 can be cleaned, the phenomenon of sundry blocking is avoided, the service lives and the working periods of the medium removing screen plate 83 and the screen mesh 831 are greatly prolonged, and the medium passing and removing efficiency of the through screen is improved. Simultaneously, can also wash the sieve seam and the brush hair 8113 of screen cloth 831 through the washing water pipe 8115 and the high pressure flushing head 8116 who is connected with high-pressure pump 8103, ensure brush hair 8113's cleanliness factor, further ensured brush hair 8113 to the cleaning effect of screen cloth 831 and sieve seam.
It should be noted that, in the present invention, the detailed structure of some devices is not described in detail, but belongs to the prior art known to those skilled in the art, and therefore, the detailed description is omitted here.
It should be noted that, under the guidance of the present invention, those skilled in the art can also make partial modifications and designs to the above system. For example, the equipment in the system is also provided with an overflow/nitrogen pipeline and the like; flow meters and the like are arranged among different units or devices and equipment on a conveying pipeline in the system, and a control valve is also arranged for adjusting the opening of the valve so as to adjust the material flow in the system.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; while the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.
Claims (9)
1. A coal gangue critical separation system is characterized by comprising: the device comprises a vibration grading sieve, a mixing barrel, a mixing pump, a coal gangue critical separator, a first sieve bend, a second sieve bend, a gangue medium removing sieve, a product medium removing sieve and a magnetic separator; the coal gangue critical sorting device is formed by connecting two conical sorting machines in series, and the critical sorting density of the coal gangue critical sorting machine is 2.1-2.2g/cm 3 ；
A waste rock outlet of the vibration grading screen is connected with a waste rock inlet of the mixing barrel, waste rock is conveyed to a solid waste site through a waste rock outlet of the vibration grading screen through a pipeline, and the vibration grading screen is used for screening out coal gangue with the granularity of-30 mm and conveying the coal gangue into the mixing barrel; the outlet of the mixing barrel is communicated with the inlet of the coal gangue critical separator through the mixing pump;
a gangue chute of the gangue critical classifier is connected with the first sieve bend, a gangue outlet of the first sieve bend is connected with the gangue medium removal sieve, and a waste gangue outlet of the gangue medium removal sieve conveys waste gangue to a solid waste site through a pipeline; a product chute of the coal gangue critical classifier is connected with the second sieve bend, a product outlet of the second sieve bend is connected with the product medium removing sieve, and a product outlet of the product medium removing sieve sends low-quality coal products to a product warehouse for storage through a pipeline;
dilute medium outlets of the gangue medium removing sieve and the product medium removing sieve are both connected with an inlet of the magnetic separator, and a tailing outlet of the magnetic separator is connected with a coal slime water treatment tank; and a medium inlet of the mixing barrel is respectively connected with a medium outlet of the first sieve bend and the second sieve bend, a qualified medium outlet of the gangue medium removing sieve and the product medium removing sieve, and a concentrate outlet of the magnetic separator.
2. The coal gangue critical separation system according to claim 1, wherein the mixing bucket is further provided with a supplementary port for supplementing media into the mixing bucket; the medium is magnetite powder.
3. The coal gangue critical separation system of claim 1, wherein the water spray inlets of the gangue media removal screen and the product media removal screen are in communication with a circulating water pipeline of the raw coal dense media separation system through a pipeline.
4. The coal refuse critical separation system according to any one of claims 1-3, wherein the gangue mesoporous screen and the product mesoporous screen have the same structure; the product medium removing sieve comprises a sieving frame, the sieving frame is obliquely arranged, and a feeding groove communicated with the inside of the sieving frame is arranged at the top of the high end of the sieving frame;
the bottom surface of the screening frame is a medium removing screen plate which can vibrate up and down, and the medium removing screen plate is connected with a vibration providing device arranged outside the screening frame; the bottom of one end, close to the feed chute, of the screening frame is provided with a lifting device in a mirror image mode, and the bottom of one end, far away from the feed chute, of the screening frame is provided with a fixing device in a mirror image mode;
the medium removing sieve plate is provided with a screen, the bottom of the medium removing sieve plate is fixedly connected with a partition plate, the partition plate forms a qualified medium bin and a dilute medium bin in the lower space of the medium removing sieve plate, the qualified medium bin is provided with a qualified medium outlet, the dilute medium bin is provided with a dilute medium outlet, and one end of the medium removing sieve plate, which is far away from the feed chute, is provided with a product outlet;
the screening frame is further provided with a spraying device, the spraying device comprises a diversion water pipe fixedly connected to the inner wall of the top of the screening frame, the diversion water pipe is communicated with a plurality of high-pressure spray heads, and the distance between each high-pressure spray head and the screen is 200-400mm; the flow dividing water pipe is communicated with a circulating water pipeline of the raw coal dense medium separation system through a high-pressure pump; the spraying device is arranged above the medium removing sieve plate corresponding to the dilute medium bin.
5. The coal gangue critical separation system of claim 4, wherein the output end of the lifting device is connected with the bottom of the screening frame, and the lifting device is any one of a cylinder, a hydraulic cylinder and an electric cylinder.
6. The coal refuse critical separation system of claim 4, characterized in that the bottoms of the dilute medium bin and the qualified medium bin are respectively inclined toward the dilute medium outlet and the qualified medium outlet.
7. The coal gangue critical separation system of claim 4, wherein a striker plate is vertically arranged on the screen along the material flow direction, and the height of the striker plate is 20-40mm.
8. The coal gangue critical separation system according to claim 4, wherein a screen slot cleaning device is arranged on the bottom surface of the medium removing screen plate, the screen slot cleaning device comprises stretching rods arranged at two ends of the medium removing screen plate in the length direction in a mirror image manner, an installation rod is connected between output ends of the two stretching rods, bristles are fixedly connected to the surface of the installation rod, and the stretching rods are connected with a motor arranged outside the screen frame;
the brush hair is used for cleaning the screen seams of the screen on the medium removing screen plate, and the motion direction of the mounting rod is vertical to the direction of the screen seams.
9. The coal gangue critical separation system according to claim 8, wherein the screen slot cleaning device further comprises flushing water pipes arranged on two sides of the medium removing screen plate in the width direction in a mirror image manner, a plurality of high-pressure flushing heads are uniformly arranged on the flushing water pipes, and the high-pressure flushing heads are inclined towards the screen; the flushing water pipe is connected with an outlet of the high-pressure pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222574310.7U CN218222868U (en) | 2022-09-27 | 2022-09-27 | Coal gangue critical separation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222574310.7U CN218222868U (en) | 2022-09-27 | 2022-09-27 | Coal gangue critical separation system |
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| CN218222868U true CN218222868U (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222574310.7U Expired - Fee Related CN218222868U (en) | 2022-09-27 | 2022-09-27 | Coal gangue critical separation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119488982A (en) * | 2025-01-09 | 2025-02-21 | 国家能源集团宁夏煤业有限责任公司枣泉煤矿 | Automatic control method and control system for underground original-field filling drum type coal gangue separator |
-
2022
- 2022-09-27 CN CN202222574310.7U patent/CN218222868U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119488982A (en) * | 2025-01-09 | 2025-02-21 | 国家能源集团宁夏煤业有限责任公司枣泉煤矿 | Automatic control method and control system for underground original-field filling drum type coal gangue separator |
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Granted publication date: 20230106 |