CN119346282A - A medium coal fine sorting process, medium coal fine sorting equipment and coal sorting system - Google Patents
A medium coal fine sorting process, medium coal fine sorting equipment and coal sorting system Download PDFInfo
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- CN119346282A CN119346282A CN202411886170.4A CN202411886170A CN119346282A CN 119346282 A CN119346282 A CN 119346282A CN 202411886170 A CN202411886170 A CN 202411886170A CN 119346282 A CN119346282 A CN 119346282A
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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
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
- B03B5/34—Applications of hydrocyclones
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The invention relates to the technical field of middling recleaning, in particular to a middling fine separation process, middling fine separation equipment and a coal separation system. The fine medium coal separation process comprises the steps of removing medium from medium coal obtained by a raw coal separation system to obtain recleaning medium coal and medium coal medium liquid, mixing refined coal medium liquid obtained by the raw coal separation system with the medium coal medium liquid to prepare medium coal recleaning medium liquid, mixing recleaning medium coal with the medium coal recleaning medium liquid, and conveying the mixture to a separation device for separation to obtain concentrate products and tailing products. The fine separation process of the middling coal and the raw coal separation system are combined to recycle middling coal products of the raw coal separation system, and the middling coal products of the raw coal separation system are recycled, so that scarce coal resources are fully utilized and protected, and huge economic benefits are created.
Description
Technical Field
The invention relates to the technical field of middling recleaning, in particular to a middling fine separation process, middling fine separation equipment and a coal separation system.
Background
Coking coal is an indispensable raw material in the coking industry and the steel industry. At present, a large amount of middlings generated in the coking coal washing process are directly used as power coal for sale, the potential value of the middlings is not fully utilized, and serious resource waste is caused. In view of the above, the invention provides a middling fine separation process, middling fine separation equipment and a coal separation system for recleaning and recycling clean coal.
Disclosure of Invention
The invention mainly aims to provide a middling fine separation process for recleaning and recycling refined coal and improving economic benefit, and also provides middling fine separation equipment adopting the middling fine separation process and a coal separation system comprising the middling fine separation equipment.
In order to achieve the above purpose, an embodiment of the present invention provides a fine separation process for middlings, wherein the middlings are selected from raw coal separation systems, and the middlings contain middlings medium liquid, and the fine separation process for middlings comprises the steps of:
Medium removal treatment is carried out on the middlings obtained by the raw coal sorting system, so as to obtain reelected middlings and middling medium mixing liquid;
Mixing refined coal mixed medium liquid obtained by the raw coal sorting system with medium coal mixed medium liquid to prepare medium coal and then selecting medium coal mixed medium liquid;
And mixing the recleaning medium coal with the medium coal recleaning medium liquid, and conveying the mixture to a separation device for separation to obtain a concentrate product and a tailing product.
Further, the medium coal medium removal treatment obtained by the raw coal sorting system further comprises the following steps:
Classifying the middlings obtained by the raw coal separation system to obtain first middlings and second middlings, wherein the particle size of the first middlings is larger than that of the second middlings;
Dissociating and crushing the first middlings to obtain third middlings;
removing medium from the second middlings to obtain middlings re-mixing medium liquid;
And mixing the second middlings after medium removal with the third middlings to obtain the reelected middlings.
Further, the step mixes the recleaning medium liquid of recleaning medium coal and middling and conveys the recleaning medium liquid to a separation device for separation, and after obtaining concentrate products and tailing products, the method further comprises the steps of:
delivering the concentrate product to a raw coal separation system for medium removal and dehydration;
and conveying the tailing products to a raw coal sorting system for medium removal and dehydration.
Further, the step of mixing the clean coal mixed medium liquid obtained by the raw coal sorting system with the medium coal mixed medium liquid to prepare the medium coal re-sorting medium liquid further comprises the following steps:
And conveying part of medium coal mixed liquor to a raw coal sorting system for standby, and mixing the rest medium coal mixed liquor with refined coal mixed liquor branched from the raw coal sorting system to prepare medium coal mixed liquor.
The embodiment of the invention also provides middling fine separation equipment, which adopts the middling fine separation process in any embodiment, and comprises a screening device, a separation device, a mixing chamber, a medium mixing chamber and a conveying system;
the screening device is arranged on the damping support and comprises a first screen assembly, the first screen assembly is used for removing medium from middlings obtained by the raw coal sorting system, the discharge end of the oversize material of the first screen assembly is communicated with the mixing chamber, and the discharge end of the undersize material of the first screen assembly is communicated with the medium mixing chamber;
the conveying system is used for conveying the materials in the mixing chamber and the clean coal mixing liquid into the mixing chamber and conveying the materials in the mixing chamber into the sorting device.
Further, the screening device also comprises a second screen assembly;
the second screen assembly and the first screen assembly are sequentially arranged, the screening particle size of the second screen assembly is larger than that of the first screen assembly, the discharge end of the oversize material of the second screen assembly is communicated with the crushing device, and the discharge end of the crushing device is communicated with the mixing chamber.
Further, a concentrate chamber for storing the concentrate product of the sorting device and a tailings chamber for storing the tailings product of the sorting device are also included.
The device further comprises a working pond, wherein a plurality of partition boards are arranged in the working pond, and the working pond is internally partitioned into a mixing chamber, a medium mixing chamber, a concentrate chamber and a tailing chamber through the partition boards.
Further, the conveying system is also used for conveying the materials in the concentrate chamber and the tailings pond to the raw coal sorting system for recycling.
The embodiment of the third aspect of the invention also provides a coal separation system, which comprises the middling fine separation equipment in any embodiment.
The invention has the beneficial effects that:
The invention provides a middling fine separation process which is used for middling re-separation, wherein middling raw materials are from a raw coal separation system, middling raw materials contain middling medium liquid, the middling fine separation process comprises the steps of removing medium from middling obtained by the raw coal separation system to obtain re-separation middling and middling medium liquid, mixing refined coal medium liquid obtained by the raw coal separation system with middling medium liquid to prepare middling re-separation medium liquid, mixing re-separation middling with middling re-separation medium liquid, and conveying the mixture to a separation device to separate to obtain concentrate products and tailing products.
The medium coal fine separation process is combined with the raw coal separation system, medium coal products of the raw coal separation system are recovered, medium coal recleaning medium liquid required for recovering the medium coal products is also from the raw coal separation system, and scarce coal resources are fully utilized and protected by recovering the medium coal products of the raw coal separation system, so that huge economic benefits are created.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a process flow diagram of a middling fine separation process provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of a fine middling separation device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a working pool according to an embodiment of the present invention.
The illustration is 1-screening device, 2-sorting device, 3-crushing device, 4-working pond, 41-mixing chamber, 42-concentrate chamber, 43-tailing chamber, 44-intermediate chamber, 45-partition, 46-first mounting piece, 47-second mounting piece, 51-first conveying pipeline, 52-first conveying pump, 53-second conveying pipeline, 54-second conveying pump, 55-third conveying pipeline, 56-third conveying pump, 57-fourth conveying pump and 58-fourth conveying pipeline.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in FIG. 1, one embodiment of the invention provides a middling fine separation process for middling re-separation, wherein middling raw materials are from a raw coal separation system, the middling raw materials contain middling medium liquid, and the middling fine separation process comprises the following steps:
Medium removal treatment is carried out on the middlings obtained by the raw coal sorting system, so as to obtain reelected middlings and middling medium mixing liquid;
Mixing refined coal mixed medium liquid obtained by the raw coal sorting system with medium coal mixed medium liquid to prepare medium coal and then selecting medium coal mixed medium liquid;
And mixing the recleaning medium coal with the medium coal recleaning medium liquid, and conveying the mixture to a separation device for separation to obtain a concentrate product and a tailing product.
The fine separation process of the middlings provided by the embodiment of the invention is used for middlings recleaning, wherein the middlings raw materials for middlings recleaning come from a raw coal separation system. The raw coal sorting system comprises a three-section heavy medium cyclone, a medium mixing barrel, a clean coal recycling module, a middling recycling module and a gangue recycling module. Raw coal is separated by a three-section heavy medium cyclone to obtain a clean coal product, a middling product and a gangue product, wherein the middling product is a middling raw material of middling fine separation equipment, and the middling product can be conveyed to the middling fine separation equipment through a chute and other structures for recleaning so as to recycle the clean coal therein. The clean coal recovery module, the middling recovery module and the gangue recovery module generally adopt structures such as an arc screen, a medium removal screen, a centrifugal machine and the like, and are used for medium removal and dehydration. The medium liquid obtained by the medium removal of the three products is conveyed to a medium mixing barrel for recycling, can be mixed with raw coal and conveyed to a three-section heavy medium cyclone for raw coal separation. In addition, the raw coal sorting system is also provided with a clean coal medium mixing pipeline for conveying clean coal medium mixing liquid, and the clean coal medium mixing pipeline is additionally provided with a tee joint so as to convey part of clean coal medium mixing liquid to the medium coal fine sorting equipment for preparing medium coal and then sorting medium mixing liquid.
In the middling recleaning process, middling raw materials are subjected to medium removal treatment to obtain recleaning middling and middling medium, the medium removal aim is to remove most of middling medium in the middling raw materials so as to avoid the influence of excessive content of the middling medium in the middling raw materials on subsequent middling recleaning, the middling medium is used for mixing with refined coal medium in a raw coal separation system to prepare middling recleaning medium required by middling recleaning, and the middling recleaning medium is mixed with recleaning coal after the preparation is finished and then conveyed to a separation device for separation, so that concentrate products and tailing products are obtained. The medium coal fine separation process provided by the embodiment is combined with the raw coal separation system to recover the medium coal products of the raw coal separation system, the medium coal recleaning medium liquid required by recovering the medium coal products is also from the raw coal separation system, and the rare coal resources are fully utilized and protected by recovering the medium coal products of the raw coal separation system, so that huge economic benefits are created.
Further, in the medium coal fine separation process provided by the embodiment of the invention, the medium coal medium removal treatment obtained by the raw coal separation system further comprises the following steps:
Classifying the middlings obtained by the raw coal separation system to obtain first middlings and second middlings, wherein the particle size of the first middlings is larger than that of the second middlings;
Dissociating and crushing the first middlings to obtain third middlings;
removing medium from the second middlings to obtain middlings re-mixing medium liquid;
And mixing the second middlings after medium removal with the third middlings to obtain the reelected middlings.
In the embodiment, the fine separation process of the middlings further comprises classification and dissociation and crushing of the middlings so as to avoid the influence of the overlarge particle size of the middlings on separation and the influence of coupling of gangue and clean coal on the clean coal in the reclaimed middlings. Specifically, the raw coal products are classified to obtain first middlings and second middlings, the first middlings are large in particle size and need to be dissociated and crushed, the products obtained after the first middlings are dissociated and crushed are third middlings, and the third middlings and the second middlings after medium removal are reelected middlings.
The fine separation process for middlings provided by the embodiment of the invention comprises the steps of mixing the recleaning middlings with the recleaning medium liquid of middlings and conveying the mixture to a separation device for separation to obtain concentrate products and tailing products, and further comprises the following steps:
delivering the concentrate product to a raw coal separation system for medium removal and dehydration;
and conveying the tailing products to a raw coal sorting system for medium removal and dehydration.
In this embodiment, the concentrate product and the tailing product obtained by the sorting device are recovered by the raw coal sorting system, so as to improve the economic benefit of the raw coal sorting system.
The fine medium coal separation process provided by the embodiment of the invention comprises the steps of mixing the clean coal mixed medium liquid obtained by a raw coal separation system with the medium coal mixed medium liquid to prepare the medium coal re-mixed medium liquid, and further comprises the following steps:
And conveying part of medium coal mixed liquor to a raw coal sorting system for standby, and mixing the rest medium coal mixed liquor with refined coal mixed liquor branched from the raw coal sorting system to prepare medium coal mixed liquor.
In the embodiment, a medium liquid part of middlings generated by medium removal of middlings is conveyed to a raw coal sorting system and used for preparing medium liquid required by raw coal sorting, and the rest part of medium liquid is mixed with refined coal medium liquid from the raw coal sorting system to prepare middlings and then mixed medium liquid, so that the production cost is saved and the economic benefit is improved.
Another embodiment of the invention also provides middling fine separation equipment, which adopts the middling fine separation process in any embodiment, and comprises a screening device 1, a separation device 2, a mixing chamber 41, a mixing chamber 44 and a conveying system, wherein the screening device 1 comprises a first screen assembly, the first screen assembly is used for removing medium from middling raw materials, the discharge end of the oversize material of the first screen assembly is communicated with the mixing chamber 41, the discharge end of the undersize material of the first screen assembly is communicated with the mixing chamber 44, and the conveying system is used for conveying materials in the mixing chamber 44 and refined coal mixing liquid into the mixing chamber 41 and conveying materials in the mixing chamber 41 into the separation device 2.
The middlings fine separation device comprises a screening device 1, a separation device 2, a mixing chamber 41, a medium mixing chamber 44 and a conveying system. The screening device 1 comprises a screen frame and a first screen assembly positioned in the screen frame, wherein the screen frame is arranged on the damping bracket so as to reduce the influence of vibration generated during the operation of the screening device on other structures of the fine and middle coal separation equipment; the medium coal product of the raw coal separation system is used as a medium coal raw material of the medium coal fine separation equipment, and contains medium coal mixed medium liquid when being conveyed to the medium coal fine separation equipment, and the first screen assembly is used for medium removal of the medium coal raw material, so that re-separation medium coal and medium coal mixed medium liquid are obtained; the medium coal is selected as the oversize material of the first screen assembly and conveyed into the mixing chamber 41, the medium coal mixture is conveyed into the mixing chamber 44 as the undersize material of the first screen assembly, the medium coal mixture is conveyed into the mixing chamber 41 for preparing the medium coal mixture required by the subsequent medium coal reselection, the conveying system comprises a first conveying pump 52, a first conveying pipeline 51, a second conveying pump 54, a second conveying pipeline 53 and a refined coal mixture conveying pipeline, two ends of the second conveying pipeline 53 are respectively communicated with the mixing chamber 44 and the mixing chamber 41, two ends of the refined coal mixture conveying pipeline are respectively communicated with a tee joint and the mixing chamber 41 which are additionally arranged in the refined coal mixture conveying pipeline, the second conveying pump 54 is arranged on the second conveying pipeline 53 and pumps the medium coal mixture in the mixing chamber 44 into the mixing chamber 41, the medium coal mixture and the refined coal mixture are mixed in the mixing chamber 41 to obtain the medium coal reselection, the medium coal mixture and the refined coal mixture are respectively communicated with two ends of the mixing chamber 41 according to the actual conditions of the first conveying pipeline and the second conveying pipeline 51, the ratio of the medium coal mixture is not arranged at the two ends of the mixing chamber 41, the first conveying pump 52 is arranged on the first conveying pipeline 51 and pumps the recleaning medium of the recleaning medium and the middling in the mixing chamber 41 into the sorting device 2 for sorting, and the concentrate product and the tailing product are obtained.
The fine middling separation equipment provided by the embodiment is used for recleaning and recycling the middling products of the raw coal separation system by combining with the original raw coal separation system, so that the scarce coal resources are fully utilized and protected, and huge economic benefits are created. Alternatively, in this embodiment, the screening device 1 may be a linear vibrating screen, an arc screen, a high-frequency vibrating screen, or the like, and the sorting device 2 may be a cyclone.
The embodiment of the invention provides middling fine separation equipment, which is shown in fig. 2 and 3, and further comprises a crushing device 3, wherein the screening device 1 further comprises a second screen assembly, the second screen assembly and the first screen assembly are sequentially arranged, the screening particle size of the second screen assembly is larger than that of the first screen assembly, the discharge end of oversize materials of the second screen assembly is communicated with the crushing device 3, and the discharge end of the crushing device 3 is communicated with a mixing chamber 41.
The screening device 1 is a double-layer screen, the screening device 1 further comprises a second screen assembly arranged in a screen frame, the screening particle size of the second screen assembly is larger than that of the first screen assembly, the second screen assembly is used for classifying the medium coal raw materials so as to avoid the influence on the subsequent screening by the screening device 2 caused by overlarge particle size of the medium coal raw materials, the crushing device 3 can adopt a vertical composite crusher, the crushing device 3 is used for crushing the medium coal raw materials of the second screen assembly, during use, the medium coal products of the raw coal screening system are conveyed to the second screen assembly through a chute as the medium coal raw materials of the medium coal fine screening device, the medium coal raw materials of the second screen assembly are first medium coal, the medium coal raw materials of the second screen assembly are directly dropped onto the first screen assembly, the first medium coal is conveyed to the crushing device 3 to be crushed and obtain third medium coal, the medium coal raw materials of the first screen assembly are both conveyed to a mixing chamber 41 as the medium coal re-screening device, the medium coal raw materials of the first screen assembly are conveyed to the medium coal fine screening system according to the medium coal liquid from the medium liquid system 44, and the medium coal liquid from the medium liquid system is conveyed to the medium liquid system 44, and the medium coal liquid is mixed and the medium liquid is conveyed from the medium liquid system to the medium coal screening system to obtain the medium coal liquid system.
Optionally, in this embodiment, a conveying pipeline and a conveying pump may be further disposed in a portion of the coal blending liquid in the blending chamber 44 and pumped back into the raw coal sorting system for configuring the medium liquid used in raw coal sorting.
The middling fine separation apparatus provided by the embodiment of the invention, as shown in fig. 2 and 3, further comprises a concentrate chamber 42 for storing the concentrate product of the separation device 2 and a tailings chamber 43 for storing the tailings product of the separation device 2.
The above description refers to that the products separated by the separating device 2 are concentrate products and tailing products, the concentrate products are conveyed to the concentrate chamber 42 for storage, the tailing products are conveyed to the tailing chamber 43 for storage, and the concentrate products in the concentrate chamber 42 and the tailing products in the tailing chamber 43 are conveyed to the raw coal separating system for recovery after being accumulated to a certain amount. The middling fine separation equipment is provided with the concentrate chamber 42 and the tailing chamber 43, so that the device is stronger in integrity, more perfect in function and convenient to intelligently control.
The embodiment of the invention provides middling fine separation equipment which is shown in fig. 2 and 3 and further comprises a working pond 4, wherein a plurality of partition plates 45 are arranged in the working pond 4, and a mixing chamber 41, a mixing chamber 44, a concentrate chamber 42 and a tailing chamber 43 are separated in the working pond 4 through the partition plates 45.
Preferably, in the present embodiment, a partition 45 is provided in the working tank 4 to divide the interior of the working tank 4 into a plurality of spaces, and each space is a mixing chamber 41, a combining chamber 44, a concentrate chamber 42 and a tailing chamber 43. Through set up baffle 45 in work pond 4 separate compounding room 41, close intermediate chamber 44, concentrate room 42 and tailing room 43, middling fine separation equipment occupation space is little, and the wholeness is strong, convenient control and convenient maintenance etc.. The mixing chamber 41, the combining chamber 44, the concentrate chamber 42 and the tailing chamber 43 are preferably arranged in a shape of a Chinese character 'tian', namely, the two partition plates 45 are arranged in a shape of a Chinese character 'cross', so that the fine middling separation equipment is more compact in structure and convenient to arrange. Alternatively, the mixing chamber 41, the combining chamber 44, the concentrate chamber 42 and the tailing chamber 43 may be arranged in a straight line, so that only four partition plates 45 are required to be arranged in the working tank 4 at intervals. It will be appreciated that in this embodiment four separate barrel structures or the like may also be provided as the mixing chamber 41, the mixing chamber 44, the concentrate chamber 42 and the tailings chamber 43 described above.
In this embodiment, a part of the side wall of the working tank 4 located in the mixing chamber 41 is provided with a clean coal closing liquid inlet for closing the conveying pipeline with the clean coal, and the clean coal closing liquid inlet is arranged on the side wall of the working tank 4, so that the clean coal closing conveying pipeline can be conveniently routed, and the screening device 1, the crushing device 3 and the sorting device 2 can be arranged above the working tank 4, so that the influence of the clean coal closing conveying pipeline on the arrangement of the screening device 1, the crushing device 3 and the sorting device 2 can be avoided.
In the middling fine separation equipment provided by the embodiment of the invention, as shown in fig. 2 and 3, a concentrate chamber 42 is adjacent to a tailing chamber 43, the upper ends of the concentrate chamber 42 and the tailing chamber 43 are open, a separation device 2 is positioned above a working pond 4, a concentrate outlet of the separation device 2 is positioned above the concentrate chamber 42, and a tailing outlet of the separation device 2 is positioned above the tailing chamber 43.
Preferably, in this embodiment, the concentrate chamber 42 and the tailing chamber 43 are adjacent to each other in the working pond 4, the upper ends of the concentrate chamber 42 and the tailing chamber 43 are open, the sorting device 2 is disposed above the partition 45 between the concentrate chamber 42 and the tailing chamber 43, and the concentrate outlet of the sorting device 2 is disposed above the concentrate chamber 42 and the tailing outlet is disposed above the tailing chamber 43, so that the concentrate product discharged from the concentrate outlet can directly enter the concentrate chamber 42, and the product discharged from the tailing outlet can directly enter the tailing chamber 43, without providing auxiliary structures such as a chute or a pipeline, thereby improving the compactness of the middling fine sorting device, facilitating the arrangement of the middling fine sorting device, and reducing the overall cost.
As shown in fig. 2 and 3, the fine middling separation equipment provided by the embodiment of the invention is characterized in that a first mounting piece 46 is arranged at the upper end of a mixing chamber 41, a crushing device 3 is arranged on the first mounting piece 46, and the discharge end of the crushing device 3 is positioned above the mixing chamber 41.
In this embodiment, breaker 3 erects in the top of compounding room 41 through first installed part 46, and breaker 3's discharge end also is located the top of compounding room 41, so, breaker 3 obtains that the third middling can directly enter into compounding room 41, need not to set up auxiliary structure such as chute or pipeline, can improve middling fine separation equipment's compactness, makes things convenient for middling fine separation equipment's arrangement, reduces overall cost.
Optionally, in this embodiment, the above-mentioned first mounting piece 46 is of a plate-shaped structure, and has good stability, the periphery of the first mounting piece 46 is connected with the upper edge of the mixing chamber 41, and the upper edge of the mixing chamber 41 is the frame of the open end of the mixing chamber 41, so that the first mounting piece 46 with a plate-shaped structure can also seal the open end of the mixing chamber 41, and therefore the third middlings discharged by the crushing device 3 can be prevented from splashing everywhere when entering the mixing chamber 41. Of course, in the present embodiment, the first mounting member 46 may also be provided as a beam, a frame structure or the like, which can achieve the purpose of supporting the crushing device 3 in the present embodiment. The first mounting plate is provided with an opening corresponding to the discharge end of the crushing device 3, the third middling discharged from the discharge end of the crushing device 3 can enter the mixing chamber 41 through the opening, and further, the first mounting piece 46 is provided with an opening corresponding to the second conveying pipeline 53, so that middling medium can be injected into the mixing chamber 41.
As shown in fig. 2 and 3, the medium coal fine separation equipment provided by the embodiment of the invention is characterized in that a medium mixing chamber 44 is adjacent to a mixing chamber 41, a second mounting piece 47 is arranged at the upper end of the medium mixing chamber 44, a screening device 1 is arranged on the second mounting piece 47, the discharge end of the oversize material of a first screen assembly is positioned above the mixing chamber 41, the discharge end of the undersize material of the first screen assembly is positioned above the medium mixing chamber 44, and the discharge end of the oversize material of the second screen assembly is positioned above the feed end of a crushing device 3.
In this embodiment, the oversize material of the second screen assembly is discharged into the crushing device 3, and in order to improve the integrity of the fine separation device for middlings, the screening device 1 is disposed beside the crushing device 3, so that the purpose of conveying the first middlings discharged from the second screen assembly into the crushing device 3 can be achieved by only providing a structure such as a chute. Further, the oversize material of the first screen assembly is directly discharged into the mixing chamber 41, and the undersize material of the first screen assembly is directly discharged into the mixing chamber 44, so that the mixing chamber 41 is preferably disposed adjacent to the mixing chamber 44, and the oversize material of the first screen assembly is discharged into the mixing chamber 41 through the chute, so that the first mounting member 46 is also provided with an opening for receiving the oversize material of the first screen assembly. The above mentions that the mixing chamber 41, the mixing chamber 44, the concentrate chamber 42 and the tailing chamber 43 are arranged in a "pan" shape, so that the concentrate chamber 42 and the tailing chamber 43 are located on the same side, and the mixing chamber 41 and the mixing chamber 44 are located on the same side. The screening device 1 is arranged above the medium combining chamber 44 to improve the integrity of the fine medium coal separation equipment, and a second mounting piece 47 is arranged at the upper end of the medium combining chamber 44 and used for mounting the screening device 1.
Preferably, in this embodiment, the second mounting member 47 is also in a plate-like structure, which has good stability, and the periphery of the second mounting member 47 is connected to the upper edge of the medium chamber 44, so that the second mounting member 47 can also close the open end of the medium chamber 44, so as to avoid splashing of medium coal medium in the medium chamber 44. Of course, in this embodiment, the second mounting members 47 may also be provided as beams, or as frame structures or the like, which all achieve the purpose of supporting the screening device 1 in this embodiment. The second mounting plate is provided with an opening corresponding to the discharge end of the undersize material of the first screen assembly of the screening device 1, so that the undersize material of the first screen assembly can enter the medium combining chamber 44.
As shown in fig. 2 and 3, the raw coal sorting system provided by the embodiment of the invention comprises a clean coal recycling module and a middling coal recycling module, and the conveying system is also used for conveying materials in the concentrate chamber 42 to the clean coal recycling module and conveying materials in the tailing pond to the middling coal recycling module.
The clean coal recovery module and the middling coal recovery module are conventional arrangements of a raw coal sorting system, and therefore are not described in detail herein. In this embodiment, the concentrate product and the tailing product of the middling fine separation device are returned to the raw coal separation system through the conveying system for recovery. The conveying system further comprises a third conveying pump 56, a third conveying pipeline 55, a fourth conveying pump 57 and a fourth conveying pipeline 58, wherein one end of the third conveying pipeline 55 is communicated with the concentrate chamber 42, the other end of the third conveying pipeline extends to the clean coal recovery module, the third conveying pump 56 is arranged on the third conveying pipeline 55 and is used for conveying concentrate products in the concentrate chamber 42 to the clean coal recovery module, one end of the fourth conveying pipeline 58 is communicated with the tailing chamber 43, the other end of the fourth conveying pipeline 58 extends to the middling recovery module, and the fourth conveying pump 57 is arranged on the fourth conveying pipeline 58 and is used for conveying tailing products in the tailing chamber 43 to the middling recovery module. Concentrate products and tailing products return to the raw coal recovery system through the conveying system, so that the medium coal fine separation equipment and the raw coal separation system can be better combined, and the economic benefit is improved.
Preferably, in this embodiment, for ease of arrangement, the first, second, third and fourth transfer pumps 52, 54, 56 and 57 are arranged side by side and on one side of the concentrate and tailing chambers 42, 43 of the working tank 4 to improve the integrity of the middling fine separation apparatus, the structure is more compact, ease of arrangement, and ease of maintenance of the four transfer pumps.
As shown in fig. 2 and 3, the fine middling separation equipment provided by the embodiment of the invention is characterized in that a first conveying pump 52 is arranged on a first conveying pipeline 51, and at least one of a densimeter, a magnetic substance detector and a pressure gauge is further arranged on the first conveying pipeline 51 and used for detecting separation parameters so as to avoid influencing middling reselection.
The third embodiment of the invention also provides a coal separation system, which comprises the middling fine separation equipment and the raw coal separation system. The coal sorting system provided by the embodiment can realize the recleaning of the middlings and recover the clean coal in the middlings, and has better economic benefit.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or connected between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
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