Super cyclone washing and gangue grouting system

Abstract

The utility model discloses a washing and gangue grouting system of a super cyclone. The system comprises a classifying screen, a super cyclone, a coal fixed screen, a coal medium drainage screen, a coal flow divider, a coal magnetic separator, a first coal slime water bucket, a coal medium mixing bucket, a gangue fixed screen, a gangue flow divider, a gangue medium drainage screen, a gangue magnetic separator, a second coal slime water bucket, a gangue medium mixing bucket, a hydrocyclone, an arc-shaped screen, a concentration tank, a first centrifugal machine, a second centrifugal machine and a filter press. The non-pressure feeding super cyclone has the advantages that the non-pressure feeding super cyclone is adopted, high-density gangue discharge of more than 2.0 is achieved through a 1.4 low-density system, desliming is not needed, and the operation management difficulty, the power consumption, the gangue coal carrying amount and the like are greatly reduced; the process flow is simple, the design time is short, the construction period is short, the occupied area is small, the investment is small, the field arrangement is compact, the number of equipment is small, the maintenance amount is low, spare parts are few, operation management is simple, production organization is simple, and the number of users is smaller.

Description

Technical Field

[0001] The utility model relates to the technical field of coal, in particular to a super cyclone washing and gangue grouting system. Background Art

[0002] Different coal particle sizes in large-scale modern thermal coal preparation plants require different equipment for washing and processing. The common washing process is: when the coal particle size is above 200mm, it needs to be crushed to below 200mm, and then the coal with a particle size of 200-13mm is sent to the desludging shallow trough for washing. After the desludging shallow trough washing, the coal with a particle size of 13-1mm is sent to the desludging heavy medium cyclone. After the desludging heavy medium cyclone, the coal with a particle size of 1-0.25mm is further sorted or not sorted. When the coal particle size is about -0.25mm, it is sent to the coal slime filter press for recovery. The clean coal after washing is sold, and the coal slime is sold separately after filter pressing at a low price, and the gangue is discharged to the gangue dump.

[0003] This process requires large investment, occupies a large area, and has complex processes, many equipments, a large amount of subsequent maintenance, a large number of spare parts to be stored, and low adaptability, resulting in waste of resources; when the lump-to-finish ratio changes, it is inconsistent with the original design. At this time, the overall system processing capacity cannot be improved. Common problems include the lump coal system not being able to handle enough and the fine coal system not being able to handle enough. At this time, the only way to reduce the amount of coal produced is to reduce the amount of coal to meet the changes in coal quality, resulting in high power consumption and high production costs. In addition, it is difficult to sell coal slime alone, and a series of subsequent environmental problems will arise after the gangue is discharged. The process system has defects. Utility Model Content

[0004] The utility model aims to provide a super cyclone washing and gangue grouting system.

[0005] The utility model is implemented by the following technical scheme: a super cyclone washing and gangue grouting system, which includes a grading screen, a super cyclone, a coal fixed screen, a coal de-mediating screen, a coal diverter, a coal magnetic separator, a first coal slime bucket, a coal combined medium bucket, a gangue fixed screen, a gangue diverter, a gangue de-mediating screen, a gangue magnetic separator, a second coal slime bucket, a gangue combined medium bucket, a hydrocyclone, an arc screen, a concentrator, a first centrifuge, a second centrifuge, and a filter press;

[0006] The oversize outlet of the grading screen is connected to the inlet of the crusher, the outlet of the crusher and the undersize outlet of the grading screen are respectively connected to the inlet of the super cyclone, the clean coal outlet and the medium coal outlet of the super cyclone are respectively connected to the inlet of the coal fixed screen, and the gangue outlet of the super cyclone is connected to the inlet of the gangue fixed screen;

[0007] The outlet of the coal fixed screen for the oversize material is communicated with the inlet of the coal de-mediation screen, and the outlet of the coal fixed screen for the undersize material is communicated with the inlet of the coal diverter;

[0008] The uppermost screen material of the coal de-mediating screen is sent to the lump clean coal area, the outlet of the second screen material of the coal de-mediating screen is connected to the inlet of the first centrifuge, the coarse coal outlet of the first centrifuge is sent to the fine clean coal area, the centrifugal liquid outlet of the centrifuge is connected to the inlet of the first coal slime water bucket, the under-screen dilute medium outlet of the coal de-mediating screen is connected to the inlet of the coal magnetic separator, the under-screen combined medium outlet of the coal de-mediating screen is connected to the inlet of the coal combined medium bucket, the combined medium outlet of the coal diverter is connected to the inlet of the coal combined medium bucket, the dilute medium outlet of the coal diverter is connected to the inlet of the coal magnetic separator, the tailings outlet of the coal magnetic separator is connected to the inlet of the first coal slime water bucket, and the combined medium outlet of the coal magnetic separator is connected to the inlet of the coal combined medium bucket;

[0009] The outlet of the oversize material of the gangue fixed screen is communicated with the inlet of the gangue de-mediating screen, and the outlet of the undersize material of the gangue fixed screen is communicated with the inlet of the gangue diverter;

[0010] The oversize of the gangue de-mediating screen is sent to the gangue area, the undersize dilute medium outlet of the gangue de-mediating screen is connected to the inlet of the gangue magnetic separator, the undersize combined medium outlet of the gangue de-mediating screen is communicated with the inlet of the gangue combined medium barrel, the combined medium outlet of the gangue diverter is communicated with the inlet of the gangue combined medium barrel, the dilute medium outlet of the gangue diverter is communicated with the inlet of the gangue magnetic separator, the tailings outlet of the gangue magnetic separator is communicated with the inlet of the second coal slime bucket, and the combined medium outlet of the gangue magnetic separator is communicated with the inlet of the gangue combined medium barrel;

[0011] The outlets of the first coal slime water bucket and the second coal slime water bucket are respectively connected to the inlet of the hydrocyclone, the underflow outlet of the hydrocyclone is connected to the inlet of the curved screen, the overflow outlet of the hydrocyclone is connected to the inlet of the thickening tank, the oversize outlet of the curved screen is connected to the inlet of the second centrifuge, the coal slime outlet of the second centrifuge is connected to the fine clean coal area, and the centrifuge outlet of the second centrifuge is connected to the inlet of the thickening tank.

[0012] Furthermore, the supernatant of the concentration tank is connected to the circulating water tank, the bottom flow outlet of the concentration tank is connected to the inlet of the filter press, the filter cake outlet of the filter press is connected to the fine clean coal area, and the filtrate outlet of the filter press is connected to the inlet of the circulating water tank.

[0013] Furthermore, it also includes a gangue backfill subsystem, which includes a toothed roller crusher, a hammer crusher, a ball mill, a gangue slurry batching tank, and a filling pump. The outlet of the gangue area is connected to the inlet of the toothed roller crusher, the outlet of the toothed roller crusher is connected to the inlet of the hammer crusher, the outlet of the hammer crusher is connected to the inlet of the ball mill, the outlet of the ball mill is connected to the inlet of the gangue slurry batching tank, the gangue slurry batching tank is provided with a water supply pipe, and the outlet of the gangue slurry batching tank is connected to the underground delamination space pipeline through the filling pump.

[0014] Furthermore, the outlets of the gangue medium barrel and the coal medium barrel are connected to the inlet pipeline of the super cyclone.

[0015] Advantages of the utility model:

[0016] 1. The pressure-free feeding super cyclone is used to achieve high-density gangue discharge of more than 2.0 with a low-density system of 1.4, without the need for desludging, which greatly reduces the difficulty of operation and management, power consumption, and the amount of coal carried by gangue;

[0017] 2. Simple process flow, short design time, short construction period, small footprint, small investment, compact on-site layout, small number of equipment, low maintenance, few spare parts, simple operation management, simple production organization, and fewer users;

[0018] 3. After the coal slime is filtered by the filter press, it can be blended and sold, which reduces the difficulty of subsequent coal slime treatment;

[0019] 4. Gangue does not need to be discharged externally, solving environmental protection problems. After being crushed, the gangue is directly backfilled into the underground separation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] In the figure: grading screen 1, crusher 2, super cyclone 3, coal fixed screen 4, gangue fixed screen 5, coal de-mediating screen 6, coal diverter 7, first centrifuge 8, first coal slime water bucket 9, fine clean coal area 10, coal magnetic separator 11, coal combined medium bucket 12, gangue de-mediating screen 13, gangue diverter 14, gangue area 15, gangue combined medium bucket 16, gangue magnetic separator 17, second coal slime water bucket 18, hydrocyclone 19, arc screen 20, thickening tank 21, second centrifuge 22, circulating water tank 23, filter press 24, tooth roller crusher 25, hammer crusher 26, ball mill 27, gangue slurry batching tank 28, filling pump 29, water supply pipe 30, underground separation space 31, and lump clean coal area 32. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 As shown, the super cyclone washing and gangue grouting system includes a grading screen 1, a super cyclone 3, a coal fixed screen 4, a coal de-mediating screen 6, a coal diverter 7, a coal magnetic separator 11, a first coal slurry bucket 9, a coal medium combining bucket 12, a gangue fixed screen 5, a gangue diverter 14, a gangue de-mediating screen 13, a gangue magnetic separator 17, a second coal slurry bucket 18, a gangue medium combining bucket 16, a hydrocyclone 19, an arc screen 20, a thickening tank 21, a first centrifuge 8, a second centrifuge 22, and a filter press 24;

[0025] The outlet of the oversize material of the grading screen 1 is connected with the inlet of the crusher 2, the outlet of the crusher 2 and the outlet of the undersize material of the grading screen 1 are connected with the inlet of the super cyclone 3 respectively, the clean coal outlet and the medium coal outlet of the super cyclone 3 are connected with the inlet of the fixed coal screen 4 respectively, the gangue outlet of the super cyclone 3 is connected with the inlet of the fixed gangue screen 5, the super cyclone 3 model ENX-WT-MAX adopts the pressureless feeding super cyclone 3, and realizes the high-density gangue discharge of more than 2.0 with the low-density system of 1.4, and no desludging is required, and the difficulty of operation and management, power consumption and the amount of coal carried by gangue are greatly reduced.

[0026] The outlet of the coal fixed screen 4 for the oversize material is connected to the inlet of the coal de-intermediation screen 6, and the outlet of the coal fixed screen 4 for the undersize material is connected to the inlet of the coal diverter 7;

[0027] The uppermost screen material of the coal-removing screen 6 is sent to the lump clean coal area 32, the second screen material outlet of the coal-removing screen 6 is connected to the inlet of the first centrifuge 8, the centrifuge liquid outlet of the first centrifuge 8 is connected to the inlet of the first coal slime water bucket 9, the coarse coal outlet of the first centrifuge 8 is sent to the fine clean coal area 10, the centrifuge liquid outlet of the first centrifuge 8 is connected to the inlet of the first coal slime water bucket 9, the underscreen dilute medium outlet of the coal-removing screen 6 is connected to the inlet of the coal magnetic separator 11, the underscreen combined medium outlet of the coal-removing screen 6 is connected to the inlet of the coal combined medium bucket 12, the combined medium outlet of the coal diverter 7 is connected to the inlet of the coal combined medium bucket 12, the dilute medium outlet of the coal diverter 7 is connected to the inlet of the coal magnetic separator 11, the tailings outlet of the coal magnetic separator 11 is connected to the inlet of the first coal slime water bucket 9, and the combined medium outlet of the coal magnetic separator 11 is connected to the inlet of the coal combined medium bucket 12;

[0028] The outlet of the fixed gangue screen 5 for the oversize material is communicated with the inlet of the gangue de-mediating screen 13, and the outlet of the fixed gangue screen 5 for the undersize material is communicated with the inlet of the gangue diverter 14;

[0029] The oversize of the gangue de-mediating screen 13 is sent to the gangue area 15, the undersize dilute medium outlet of the gangue de-mediating screen 13 is connected to the inlet of the gangue magnetic separator 17, the undersize combined medium outlet of the gangue de-mediating screen 13 is connected to the inlet of the gangue combined medium barrel 16, the combined medium outlet of the gangue diverter 14 is connected to the inlet of the gangue combined medium barrel 16, the dilute medium outlet of the gangue diverter 14 is connected to the inlet of the gangue magnetic separator 17, the tailings outlet of the gangue magnetic separator 17 is connected to the inlet of the second coal slime bucket 18, and the combined medium outlet of the gangue magnetic separator 17 is connected to the inlet of the gangue combined medium barrel 16;

[0030] The outlets of the first coal slime water bucket 9 and the second coal slime water bucket 18 are respectively connected to the inlet of the hydrocyclone 19, the underflow outlet of the hydrocyclone 19 is connected to the inlet of the curved screen 20, the overflow outlet of the hydrocyclone 19 is connected to the inlet of the thickening tank 21, the overscreen outlet of the curved screen 20 is connected to the inlet of the second centrifuge 22, the coal slime outlet of the second centrifuge 22 is connected to the fine clean coal area 10, and the centrifuge outlet of the second centrifuge 22 is connected to the inlet of the thickening tank 21.

[0031] The supernatant of the concentration tank 21 is connected to the circulating water tank 23, the bottom flow outlet of the concentration tank 21 is connected to the inlet of the filter press 24, the filter cake outlet of the filter press 24 is connected to the fine coal area 10, and the filtrate outlet of the filter press 24 is connected to the inlet of the circulating water tank 23. The coal slime can be blended and sold after ultra-high pressure filtration. The filter press is an ultra-high pressure filter press, and its model is STC ultra-high pressure filter press of Ernst & Young Technology.

[0032] The process is simple, the design time is short, and the construction period is short; 3. It occupies a small area, has a small investment, has a compact on-site layout, has a small number of equipment, has a low maintenance workload, has few spare parts, has simple operation and management, has a simple production organization, and requires fewer users;

[0033] The invention also includes a gangue backfill subsystem, which includes a toothed roller crusher 25, a hammer crusher 26, a ball mill 27, a gangue slurry batching tank 28, and a filling pump 29. The outlet of the gangue area 15 is connected to the inlet of the toothed roller crusher 25, the outlet of the toothed roller crusher 25 is connected to the inlet of the hammer crusher 26, the outlet of the hammer crusher 26 is connected to the inlet of the ball mill 27, the outlet of the ball mill 27 is connected to the inlet of the gangue slurry batching tank 28, and a water supply pipe 30 is provided on the gangue slurry batching tank 28. The outlet of the gangue slurry batching tank 28 is connected to the underground delamination space pipeline through the filling pump 29. The gangue does not need to be discharged externally, so as to solve the environmental protection problem. The gangue can be directly backfilled into the underground delamination space 31.

[0034] The outlets of the gangue medium barrel 16 and the coal medium barrel 12 are connected to the inlet pipeline of the super cyclone 3, and the medium is sent to the super cyclone 3 for reuse.

[0035] The specific operation process of this embodiment is as follows:

[0036] The raw coal is screened by the grading screen 1 to 80mm particle size raw coal, the +80mm particle size raw coal enters the crusher 2 to be crushed to less than 80mm, and is mixed with the raw coal below 80mm to enter the super cyclone 3 for washing. The -80mm raw coal is washed by the super cyclone 3 to produce two products, namely clean coal (medium coal enters the clean coal section) and gangue;

[0037] Clean coal part: the clean coal is de-intercalated through the coal fixed screen 4 (1mm), and the medium solution of the fixed screen 4 screen passes through the coal diverter 7, and a part of it enters the coal medium barrel 12, and a part of it enters the coal magnetic separator 11. The clean coal then enters the coal de-intercalation screen 6 for de-intercalation. The coal de-intercalation screen 6 is double-layered, with an upper layer of 25mm and a lower layer of 1mm. The +25mm is directly used as a block clean coal product after de-intercalation, and the 25-1mm is used as a fine clean coal product after dehydration by the first centrifuge 8. The centrifugal liquid enters the first coal slime water bucket 9, and the -1mm qualified medium section (the screen surface is not sprayed with water) is recovered and enters the coal medium barrel 12, and the -1mm unqualified medium section (the screen surface on this side is sprayed with water to wash the medium on the coal surface) enters the coal magnetic separator 11; the coal magnetic separator 11 recovers the medium and enters the coal medium barrel 12, and the tailings enter the first coal slime water bucket 9;

[0038] The coal slurry in the first coal slurry bucket 9 and the second coal slurry bucket 18 is pumped into the hydrocyclone 19 (0.25 mm). The bottom flow of the hydrocyclone 19 enters the curved screen 20 for dehydration, and then enters the second centrifuge 22 for dehydration to become coarse coal slurry, which is blended into fine clean coal for sale; the overflow of the hydrocyclone 19 and the water under the curved screen 20 and the centrifugal liquid enter the concentration tank 21. After sedimentation in the concentration tank 21, the bottom flow is pumped into the filter press 24 for dehydration to become dry coal slurry, which is blended into fine clean coal for sale, and the overflow of the concentration tank 21 and the filtrate water of the filter press 24 are sent to the circulating water tank 23 for use as circulating water;

[0039] Gangue part: Gangue is de-mediumed through the gangue fixed screen 5 (1mm), and a part of the medium solution enters the gangue medium barrel 16 through the diverter, and a part enters the gangue magnetic separator 17. The gangue then enters the gangue de-medium screen 13 for de-mediuming. The size of the de-medium screen is 1mm. After de-mediuming, the gangue becomes gangue. The -1mm qualified medium segment (the screen surface is not sprayed with water) is recovered and enters the gangue medium barrel 16, and the -1mm unqualified medium segment (the screen surface on this side is sprayed with water to wash the medium on the surface of the gangue) enters the gangue magnetic separator 17; the gangue magnetic separator 17 recovers the medium and enters the gangue medium barrel 16, and the tailings enter the second coal slime water bucket 18;

[0040] The gangue is crushed to -50mm by the toothed roller crusher 25, and then enters the hammer crusher 26 to be crushed to -10mm, and then enters the ball mill 27 to be crushed to -0.2mm. Gangue slurry is made in the gangue slurry batching tank 28 and injected into the underground separation space from the borehole through the filling pump.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Super cyclone washing and gangue grouting system, characterized by: It includes a grading screen, a super cyclone, a coal fixed screen, a coal de-mediating screen, a coal diverter, a coal magnetic separator, a first coal slime water bucket, a coal combined medium bucket, a gangue fixed screen, a gangue diverter, a gangue de-mediating screen, a gangue magnetic separator, a second coal slime water bucket, a gangue combined medium bucket, a hydrocyclone, an arc screen, a concentrator, a first centrifuge, a second centrifuge, and a filter press; The oversize outlet of the grading screen is connected to the inlet of the crusher, the outlet of the crusher and the undersize outlet of the grading screen are respectively connected to the inlet of the super cyclone, the clean coal outlet and the medium coal outlet of the super cyclone are respectively connected to the inlet of the coal fixed screen, and the gangue outlet of the super cyclone is connected to the inlet of the gangue fixed screen; The outlet of the coal fixed screen for the oversize material is communicated with the inlet of the coal de-mediation screen, and the outlet of the coal fixed screen for the undersize material is communicated with the inlet of the coal diverter; The uppermost screen material of the coal de-mediating screen is sent to the lump clean coal area, the outlet of the second screen material of the coal de-mediating screen is connected to the inlet of the first centrifuge, the coarse coal outlet of the first centrifuge is sent to the fine clean coal area, the centrifugal liquid outlet of the centrifuge is connected to the inlet of the first coal slime water bucket, the under-screen dilute medium outlet of the coal de-mediating screen is connected to the inlet of the coal magnetic separator, the under-screen combined medium outlet of the coal de-mediating screen is connected to the inlet of the coal combined medium bucket, the combined medium outlet of the coal diverter is connected to the inlet of the coal combined medium bucket, the dilute medium outlet of the coal diverter is connected to the inlet of the coal magnetic separator, the tailings outlet of the coal magnetic separator is connected to the inlet of the first coal slime water bucket, and the combined medium outlet of the coal magnetic separator is connected to the inlet of the coal combined medium bucket; The outlet of the oversize material of the gangue fixed screen is communicated with the inlet of the gangue de-mediating screen, and the outlet of the undersize material of the gangue fixed screen is communicated with the inlet of the gangue diverter; The oversize of the gangue de-mediating screen is sent to the gangue area, the undersize dilute medium outlet of the gangue de-mediating screen is connected to the inlet of the gangue magnetic separator, the undersize combined medium outlet of the gangue de-mediating screen is communicated with the inlet of the gangue combined medium barrel, the combined medium outlet of the gangue diverter is communicated with the inlet of the gangue combined medium barrel, the dilute medium outlet of the gangue diverter is communicated with the inlet of the gangue magnetic separator, the tailings outlet of the gangue magnetic separator is communicated with the inlet of the second coal slime bucket, and the combined medium outlet of the gangue magnetic separator is communicated with the inlet of the gangue combined medium barrel; The outlets of the first coal slime water bucket and the second coal slime water bucket are respectively connected to the inlet of the hydrocyclone, the underflow outlet of the hydrocyclone is connected to the inlet of the curved screen, the overflow outlet of the hydrocyclone is connected to the inlet of the thickening tank, the oversize outlet of the curved screen is connected to the inlet of the second centrifuge, the coal slime outlet of the second centrifuge is connected to the fine clean coal area, and the centrifuge outlet of the second centrifuge is connected to the inlet of the thickening tank.

2. The super cyclone washing and gangue grouting system according to claim 1 is characterized in that: The supernatant of the concentration tank is connected to the circulating water tank, the bottom flow outlet of the concentration tank is connected to the inlet of the filter press, the filter cake outlet of the filter press is connected to the fine coal area, and the filtrate outlet of the filter press is connected to the inlet of the circulating water tank.

3. The super cyclone washing and gangue grouting system according to claim 1 is characterized in that: It also includes a gangue backfill subsystem, which includes a toothed roller crusher, a hammer crusher, a ball mill, a gangue slurry batching tank, and a filling pump. The outlet of the gangue area is connected to the inlet of the toothed roller crusher, the outlet of the toothed roller crusher is connected to the inlet of the hammer crusher, the outlet of the hammer crusher is connected to the inlet of the ball mill, the outlet of the ball mill is connected to the inlet of the gangue slurry batching tank, the gangue slurry batching tank is provided with a water supply pipe, and the outlet of the gangue slurry batching tank is connected to the underground delamination space pipeline through the filling pump.

4. The super cyclone washing and gangue grouting system according to claim 1 is characterized in that: The outlets of the gangue medium barrel and the coal medium barrel are connected to the inlet pipeline of the super cyclone.

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