Gangue utilization system

Abstract

The utility model discloses a gangue utilization system which comprises a raw coal processing system, an oversize outlet of the raw coal processing system is connected with an inlet of a drum type sorting machine, a first outlet of the drum type sorting machine is connected with an inlet of a gangue medium drainage screen, and a second outlet of the drum type sorting machine is connected with an inlet of a kaolinite rock medium drainage screen. And a third outlet of the drum-type sorting machine is connected with an inlet of the middling medium drainage screen. The method has the advantages that coarse gangue, middling coal and kaolinite rock are screened out through the drum type sorting machine, then the coarse gangue, the middling coal and the kaolinite rock are respectively screened through the medium drainage screen to obtain effective components for recycling, the screened dilute medium is subjected to magnetic separation, thickening and hydraulic cyclone separation again, finally liquid is discharged, solid materials are mixed into the middling coal for recycling, beneficial components in the gangue are fully recycled, and waste is reduced.

Description

Technical field:

[0001] The utility model relates to the technical field of ore mining and dressing, in particular to a gangue utilization system. Background technology:

[0002] Gangue is a type of rock mixed in coal seams. It contains a small amount of combustible material and is difficult to burn. Commonly known as "slag," it is a type of rock that is extracted from underground or mixed with ore during the mining process. Gangue is a solid waste produced during coal mining and washing.

[0003] Most of the ways to deal with gangue are to discharge it to a gangue dump. Gangue is flammable, especially when the amount of gangue piled in the dump is large, it is more prone to fire and difficult to manage in the later stage. As the country's requirements for environmental protection increase, gangue dumps are no longer approved and there is no external site for gangue discharge.

[0004] At present, the emergence of the separation zone grouting filling coal mining method (the application system is referred to as the separation zone grouting system) can backfill the gangue into the mine for effective treatment. However, there are still usable components in the gangue, such as coal, kaolin, etc., which will be directly ground and buried using the separation zone grouting system, resulting in the effective components in the gangue not being effectively utilized. Utility model content:

[0005] The purpose of the utility model is to provide a gangue utilization system.

[0006] The utility model is implemented by the following technical solutions:

[0007] A gangue utilization system includes a raw coal processing system, wherein the underscreen outlet of the raw coal processing system is connected to the inlet of a separation grouting system, the overscreen outlet of the raw coal processing system is connected to the inlet of a drum separator, the first outlet of the drum separator is connected to the inlet of a gangue de-mediation screen, the second outlet of the drum separator is connected to the inlet of a kaolinite de-mediation screen, and the third outlet of the drum separator is connected to the inlet of a medium coal de-mediation screen;

[0008] The material outlet of the gangue de-media screen is connected to the inlet of the separation grouting system, the combined medium outlet of the gangue de-media screen is connected to the inlet of the combined medium barrel, and the diluted medium outlet of the gangue de-media screen is connected to the inlet of the diluted medium barrel;

[0009] The material outlet of the kaolinite de-mediation screen is connected to the kaolinite system inlet, the combined media outlet of the kaolinite de-mediation screen is connected to the combined media barrel inlet, and the diluted media outlet of the gangue de-mediation screen is connected to the diluted media barrel inlet;

[0010] The material outlet of the medium coal de-mediation screen is connected to the medium coal system inlet, the combined medium outlet of the medium coal de-mediation screen is connected to the combined medium barrel inlet, and the diluted medium outlet of the gangue de-mediation screen is connected to the diluted medium barrel inlet;

[0011] The outlet of the dilute medium barrel is connected to the inlet of the magnetic separator, the concentrate outlet of the magnetic separator is connected to the inlet of the medium thickener, the combined medium outlet of the medium thickener is connected to the inlet of the combined medium barrel, and the dilute medium outlet of the medium thickener is connected to the inlet of the dilute medium barrel;

[0012] The tailings outlet of the magnetic separator is connected to the inlet of the hydrocyclone, the overflow outlet of the hydrocyclone is connected to the inlet of the thickening tank, the underflow outlet of the hydrocyclone is connected to the inlet of the high-frequency screen, the upper screen outlet of the high-frequency screen is connected to the inlet of the medium coal system, and the lower screen outlet of the high-frequency screen is connected to the inlet of the thickening tank;

[0013] The overflow port of the concentration tank is connected to the inlet of the circulating water tank, the bottom flow port of the concentration tank is connected to the inlet of the filter press, the discharge port of the filter press is connected to the inlet of the circulating water tank, and the material port of the filter press is connected to the inlet of the medium coal system.

[0014] Preferably, the raw coal processing system includes a primary grading screen, the under-screen outlet of the primary grading screen is connected to the inlet of the secondary grading screen, the under-screen outlet of the secondary grading screen is connected to the inlet of the ZM separator, and the first outlet of the ZM separator is connected to the inlet of the third grading screen;

[0015] The upper screen outlet of the secondary grading screen is connected to the inlet of the TDS sorting system, and the first outlet of the TDS sorting system is connected to the inlet of the third grading screen;

[0016] The upper screen outlet of the third grading screen is the upper screen outlet of the raw coal processing system, and the lower screen outlet of the third grading screen is the lower screen outlet of the raw coal processing system.

[0017] Preferably, the upper screen outlet of the first-stage grading screen is connected to the crusher inlet, and the crusher outlet is connected to the inlet of the second-stage grading screen.

[0018] Preferably, the outlet of the mixing barrel is connected to the inlet of the drum separator.

[0019] The advantages of this utility model are: the gangue separated from the raw coal can be separated into medium coal, kaolinite and gangue with less useful components, and the de-mediumized medium coal and kaolinite can be reused or made into products, the de-mediumized gangue can be used for backfilling in the delamination grouting system, and the de-mediumized gangue, de-mediumized medium coal and de-mediumized kaolinite can be further separated, the water can be returned to the circulating water and put back into the system, and the coal slime can be mixed with the medium coal for use, thereby improving the recycling rate. Description of the drawings:

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

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

[0022] In the figure: raw coal processing system 1, primary grading screen 1.1, secondary grading screen 1.2, ZM separator 1.3, tertiary grading screen 1.4, TDS separator 1.5, separation grouting system 2, drum separator 3, gangue de-mediating screen 4, kaolinite de-mediating screen 5, medium coal de-mediating screen 6, combined medium barrel 7, dilute medium barrel 8, kaolinite system 9, medium coal system 10, magnetic separator 11, medium thickener 12, hydrocyclone 13, thickening tank 14, circulating water tank 15, filter press 16, crusher 17, high-frequency screen 18. Specific implementation method:

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

[0024] like Figure 1 As shown, a gangue utilization system includes a raw coal processing system 1, which includes a primary grading screen 1.1. The upper screen outlet of the primary grading screen 1.1 is connected to the inlet of a crusher 17, the outlet of the crusher 17 is connected to the inlet of a secondary grading screen 1.2, the lower screen outlet of the primary grading screen 1.1 is connected to the inlet of the secondary grading screen 1.2, the lower screen outlet of the secondary grading screen 1.2 is connected to the inlet of a ZM separator 1.3, and the first outlet of the ZM separator 1.3 is connected to the inlet of a third grading screen 1.4.

[0025] The upper screen outlet of the secondary grading screen 1.2 is connected to the inlet of the TDS sorting system 1.5, and the first outlet of the TDS sorting system 1.5 is connected to the inlet of the third grading screen 1.4;

[0026] The upper screen outlet of the third grading screen 1.4 is the upper screen outlet of the raw coal processing system 1, and the lower screen outlet of the third grading screen 1.4 is the lower screen outlet of the raw coal processing system 1.

[0027] The under-screen outlet of the raw coal processing system 1 is connected to the inlet of the separation layer grouting system 2, the above-screen outlet of the raw coal processing system 1 is connected to the inlet of the drum separator 3, the first outlet of the drum separator 3 is connected to the inlet of the gangue de-mediation screen 4, the second outlet of the drum separator 3 is connected to the inlet of the kaolinite de-mediation screen 5, and the third outlet of the drum separator 3 is connected to the inlet of the medium coal de-mediation screen 6;

[0028] The material outlet of the gangue de-mediation screen 4 is connected to the inlet of the separation layer grouting system 2, the combined medium outlet of the gangue de-mediation screen 4 is connected to the inlet of the combined medium barrel 7, and the diluted medium outlet of the gangue de-mediation screen 4 is connected to the inlet of the diluted medium barrel 8;

[0029] The material outlet of the kaolinite de-mediation screen 5 is connected to the inlet of the kaolinite system 9, the combined medium outlet of the kaolinite de-mediation screen 5 is connected to the inlet of the combined medium barrel 7, and the diluted medium outlet of the gangue de-mediation screen 4 is connected to the inlet of the diluted medium barrel 8;

[0030] The material outlet of the medium coal de-mediation screen 6 is connected to the inlet of the medium coal system 10, the combined medium outlet of the medium coal de-mediation screen 6 is connected to the inlet of the combined medium barrel 7, and the diluted medium outlet of the gangue de-mediation screen 4 is connected to the inlet of the diluted medium barrel 8;

[0031] The outlet of the combined barrel 7 is connected to the inlet of the drum separator 3;

[0032] The outlet of the diluent barrel 8 is connected to the inlet of the magnetic separator 11, the concentrate outlet of the magnetic separator 11 is connected to the inlet of the medium thickener 12, the combined medium outlet of the medium thickener 12 is connected to the inlet of the combined medium barrel 7, and the diluent outlet of the medium thickener 12 is connected to the inlet of the diluent barrel 8;

[0033] The tailings outlet of the magnetic separator 11 is connected to the inlet of the hydrocyclone 13, the overflow outlet of the hydrocyclone 13 is connected to the inlet of the thickening tank 14, the underflow outlet of the hydrocyclone 13 is connected to the inlet of the high-frequency screen 18, the upper screen outlet of the high-frequency screen 18 is connected to the inlet of the medium coal system 10, and the lower screen outlet of the high-frequency screen 18 is connected to the inlet of the thickening tank 14;

[0034] The overflow port of the concentration tank 14 is connected to the inlet of the circulating water tank 15, the bottom flow port of the concentration tank 14 is connected to the inlet of the filter press 16, the discharge port of the filter press 16 is connected to the inlet of the circulating water tank 15, and the material port of the filter press 16 is connected to the inlet of the medium coal system 10.

[0035] Working principle: When the utility model is in use, the raw coal is classified by the first-level grading screen 1.1 with a particle size of 200mm. The particles with a particle size less than 200mm are classified again by the second-level grading screen 1.2. The particles with a particle size greater than or equal to 200mm are crushed by the crusher 17 to a particle size less than 200mm and then returned to the second-level grading screen 1.2 for classification.

[0036] After secondary classification, the raw coal with a particle size of 50mm or larger enters the TDS sorting system 1.5 for sorting, and then produces lump clean coal and gangue. The raw coal with a particle size of less than 50mm enters the ZM sorting machine 1.3 for sorting, and then produces fine clean coal and gangue.

[0037] The gangue is screened by the 13mm third classification screen 1.4. Particles with a diameter less than 13mm enter the separation grouting system 2. Particles with a diameter greater than or equal to 13mm enter the drum separator 3 for sorting, and gangue, kaolinite, and medium coal are produced. The gangue is removed by the gangue removal screen 4. The mixed medium (qualified medium) enters the mixed medium barrel 7, and the thin medium enters the thin medium barrel 8. The gangue enters the separation grouting system 2.

[0038] The medium coal is de-mediated through the medium coal de-mediation screen 6, the mixed medium enters the mixed medium barrel 7, the thin medium enters the thin medium barrel 8, and the medium coal enters the medium coal system 10 for storage or shipment and sale separately; the kaolin is de-mediated through the kaolin de-mediation screen 5, the mixed medium enters the mixed medium barrel 7, the thin medium enters the thin medium barrel 8, and the kaolin enters the kaolin system 9 for storage or shipment and sale separately.

[0039] At this stage, the gangue separated from the raw coal can be separated into medium coal, kaolin and gangue with less useful components and de-intercalated. The de-intercalated medium coal and kaolin can be reused or made into products, and the de-intercalated gangue can be used for backfilling in the separation grouting system 2.

[0040] The dilute medium in the dilute medium barrel 8 enters the magnetic separator 11 for recycling, the selected concentrate enters the medium thickener 12, and the selected tailings enter the hydrocyclone 13. After the concentrate is processed by the medium thickener 12, the combined medium enters the combined medium barrel 7, and the dilute medium enters the dilute medium barrel 8; after the tailings are processed by the hydrocyclone 13, the overflow enters the thickening tank 14, the underflow enters the high-frequency screen 18 for processing, the oversize of the high-frequency screen 18 enters the medium coal system 10 for recycling and mixed with the medium coal, and the undersize water enters the thickening tank 14; the overflow of the thickening tank 14 enters the circulating water tank 15, the underflow enters the filter press 16 for processing, and the filtrate of the filter press 16 enters the circulating water tank 15. The recovered water can be used in the system water, and the treated coal slime enters the medium coal system 10 for mixing and then sale.

[0041] At this stage, the de-coated gangue, de-coated medium coal and de-coated kaolin can be further separated, the water can be returned to the circulating water system, and the coal slime can be mixed with the medium coal to improve the recycling rate.

[0042] In the separation grouting system 1, the gangue is first crushed to a particle size of less than 50mm by a tooth roller crusher, then crushed to a particle size of less than 10mm by a hammer crusher, and then crushed to a particle size of less than 0.2mm by a ball mill. It is mixed with water in a certain ratio to form a gangue slurry with a density of about 1.4m3 / g, and finally filled into the underground separation space through a filling pump.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A waste rock utilization system, characterized in that: It includes a raw coal processing system, wherein the under-screen outlet of the raw coal processing system is connected to the inlet of the separation grouting system, the over-screen outlet of the raw coal processing system is connected to the inlet of the drum separator, the first outlet of the drum separator is connected to the inlet of the gangue de-mediation screen, the second outlet of the drum separator is connected to the inlet of the kaolinite de-mediation screen, and the third outlet of the drum separator is connected to the inlet of the medium coal de-mediation screen; The material outlet of the gangue de-media screen is connected to the inlet of the separation grouting system, the combined medium outlet of the gangue de-media screen is connected to the inlet of the combined medium barrel, and the diluted medium outlet of the gangue de-media screen is connected to the inlet of the diluted medium barrel; The material outlet of the kaolinite de-mediation screen is connected to the kaolinite system inlet, the combined media outlet of the kaolinite de-mediation screen is connected to the combined media barrel inlet, and the diluted media outlet of the gangue de-mediation screen is connected to the diluted media barrel inlet; The material outlet of the medium coal de-mediation screen is connected to the medium coal system inlet, the combined medium outlet of the medium coal de-mediation screen is connected to the combined medium barrel inlet, and the diluted medium outlet of the gangue de-mediation screen is connected to the diluted medium barrel inlet; The outlet of the dilute medium barrel is connected to the inlet of the magnetic separator, the concentrate outlet of the magnetic separator is connected to the inlet of the medium thickener, the combined medium outlet of the medium thickener is connected to the inlet of the combined medium barrel, and the dilute medium outlet of the medium thickener is connected to the inlet of the dilute medium barrel; The tailings outlet of the magnetic separator is connected to the inlet of the hydrocyclone, the overflow outlet of the hydrocyclone is connected to the inlet of the thickening tank, the underflow outlet of the hydrocyclone is connected to the inlet of the high-frequency screen, the upper screen outlet of the high-frequency screen is connected to the inlet of the medium coal system, and the lower screen outlet of the high-frequency screen is connected to the inlet of the thickening tank; The overflow port of the concentration tank is connected to the inlet of the circulating water tank, the bottom flow port of the concentration tank is connected to the inlet of the filter press, the discharge port of the filter press is connected to the inlet of the circulating water tank, and the material port of the filter press is connected to the inlet of the medium coal system.

2. The waste rock utilization system according to claim 1, characterized in that: The raw coal processing system includes a primary grading screen, the under-screen outlet of the primary grading screen is connected to the inlet of the secondary grading screen, the under-screen outlet of the secondary grading screen is connected to the inlet of the ZM separator, and the first outlet of the ZM separator is connected to the inlet of the third grading screen; The upper screen outlet of the secondary grading screen is connected to the inlet of the TDS sorting system, and the first outlet of the TDS sorting system is connected to the inlet of the third grading screen; The upper screen outlet of the third grading screen is the upper screen outlet of the raw coal processing system, and the lower screen outlet of the third grading screen is the lower screen outlet of the raw coal processing system.

3. The waste rock utilization system according to claim 2, characterized in that: The upper screen outlet of the primary grading screen is connected to the crusher inlet, and the crusher outlet is connected to the inlet of the secondary grading screen.

4. The waste rock utilization system according to claim 1, characterized in that: The outlet of the combined barrel is connected to the inlet of the drum separator.

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