Coarse slime purification device for coal preparation plant
By separately recovering the gangue and dilute medium magnetic tailings separated by the heavy medium system and dewatering them using a three-mass high-frequency fine screen, the problem of repeated gangue and dilute medium separation in existing devices is solved, realizing the separation of fine gangue and dilute medium tailings from the dilute medium magnetic separator, and reducing system power consumption and operating costs.
Patent Information
- Application Number
- CN202520054708.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-10
AI Technical Summary
Existing coarse coal slime purification devices suffer from problems such as repeated and ineffective separation of gangue and dilute medium, contamination of coarse and fine coal slime, and increased system throughput and power consumption.
The rare medium magnetic tailings of the gangue separated by the heavy medium system are recovered separately and directly dewatered and recovered using a three-mass high-frequency fine screen, avoiding entry into the coal slime classification and separation process, thus realizing the separation and graded treatment of fine gangue from the rare medium magnetic separator tailings.
This avoids repeated and ineffective sorting of gangue, reduces the processing capacity and equipment types of coal slime grading and sorting systems, lowers power consumption, and reduces the operating costs of coal preparation plants.
Smart Images
Figure CN223761184U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal slime water treatment technology, and in particular to a device for purifying coarse coal slime in a coal preparation plant. Background Technology
[0002] The coarse coal slime purification device is a supporting equipment for coal slime water treatment. In the existing coal preparation plant, the dilute medium of the desliming screen for clean coal and gangue is recovered by a shared dilute medium magnetic separator. The concentrate from the magnetic separator is returned to the medium system for circulation, and all the tailings from the dilute medium magnetic separator containing coal slime enter the coal slime water tank, and then enter the coal slime grading and sorting system for recycling. With the continuous development of technology, people have increasingly higher requirements for the manufacturing process of coarse coal slime purification devices.
[0003] Existing coarse coal slime purification devices have certain drawbacks. The coal slime in the gangue dilute medium is already a byproduct of the heavy medium system, making it unsuitable for further separation into the coal slime grading and separation system. This results in redundant and ineffective separation. Gangue entering the coal slime separation system contaminates the coarse and fine coal slime, causing a "back ash" phenomenon. It also increases the processing capacity of the coal slime water grading and separation system, requires larger equipment sizes, increases the system's installed power, and raises power consumption, all of which negatively impact actual operation. Therefore, we propose a coarse coal slime purification device for coal preparation plants. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a coal preparation plant coarse coal slime purification device. By separately recovering the gangue and dilute medium magnetic tailings separated by the heavy medium system, and directly dewatering and recovering them using a three-mass high-frequency fine screen, without entering the coal slime grading and sorting stage, it achieves the separation and quality treatment of fine gangue from the tailings of the dilute medium magnetic separator, which can effectively solve the problems in the background technology.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a coarse coal slime purification device for a coal preparation plant, comprising a fine coal desliming under-screen dilute medium system and a gangue desliming under-screen dilute medium system. The fine coal desliming under-screen dilute medium system is connected to a fine coal dilute medium magnetic separator, and the gangue desliming under-screen dilute medium system is connected to a gangue dilute medium magnetic separator. Both the fine coal dilute medium magnetic separator and the gangue dilute medium magnetic separator are connected to a concentrate heavy medium system and a coal slime classifying hydrocyclone. The coal slime classifying hydrocyclone is connected to a coarse coal slime separator and a fine coal slime collection mechanism. The coarse coal slime separator is connected to a coarse and fine coal slime arc screen, and the coarse and fine coal slime arc screen is connected to a coarse and fine coal slime centrifuge. The coarse and fine coal slime centrifuge is connected to a coarse and fine coal slime collection mechanism. Both the coarse coal slime separator and the gangue dilute medium magnetic separator are connected to a coarse and fine coal slime dewatering screen, and the coarse and fine coal slime dewatering screen is connected to a coarse tailings coal slime collection mechanism.
[0006] Preferably, a first conveying pipe connects the coal desliming under-screen dilute medium system to the coal dilute medium magnetic separator, a second conveying pipe connects the gangue desliming under-screen dilute medium system to the gangue dilute medium magnetic separator, and a concentrate heavy medium system connects the coal dilute medium magnetic separator, the gangue dilute medium magnetic separator, and the third conveying pipe.
[0007] Preferably, a fourth conveying pipe is connected between the fine coal dilute medium magnetic separator and the coal slime classifying hydrocyclone, between the gangue dilute medium magnetic separator and the coal slime classifying hydrocyclone and the coarse and fine coal slime dewatering screen, between the coal slime classifying hydrocyclone and the fine coal slime collection mechanism and the coarse coal slime separator, between the coarse coal slime separator and the coarse and fine coal slime arc screen and the coarse and fine coal slime dewatering screen, and between the coarse and fine coal slime arc screen and the coarse and fine coal slime centrifuge.
[0008] Preferably, the under-screen dilute medium system for desliming clean coal and the dilute medium magnetic separator for clean coal are connected through a first conveying pipe, the under-screen dilute medium system for desliming gangue and the dilute medium magnetic separator for gangue are connected through a second conveying pipe, and a third conveying pipe is connected between the dilute medium magnetic separator for clean coal, the dilute medium magnetic separator for gangue, and the heavy medium system for concentrate.
[0009] Preferably, the fine coal dilute medium magnetic separator and the coal slime classifying hydrocyclone, the gangue dilute medium magnetic separator and the coal slime classifying hydrocyclone and the coarse and fine coal slime dewatering screen, the coal slime classifying hydrocyclone and the fine coal slime collection mechanism and the coarse coal slime separator, the coarse coal slime separator and the coarse and fine coal slime arc screen and the coarse and fine coal slime dewatering screen, and the coarse and fine coal slime arc screen and the coarse and fine coal slime centrifuge are all connected through a fourth conveying pipe.
[0010] Preferably, the output end of the under-screen dilute medium system for clean coal desliming is connected to the input end of the clean coal dilute medium magnetic separator; the output end of the under-screen dilute medium system for gangue desliming is connected to the input end of the gangue dilute medium magnetic separator; the output ends of the clean coal dilute medium magnetic separator and the gangue dilute medium magnetic separator are connected to the input ends of the concentrate heavy medium system and the coal slime classifying hydrocyclone; the output end of the coal slime classifying hydrocyclone is connected to the input ends of the coarse coal slime separator and the fine coal slime collection mechanism; the output end of the coarse coal slime separator is connected to the input ends of the coarse and fine coal slime arc screen and the coarse and fine coal slime dewatering screen; the output end of the coarse and fine coal slime arc screen is connected to the input end of the coarse and fine coal slime centrifuge; the output end of the coarse and fine coal slime centrifuge is connected to the input end of the coarse and fine coal slime collection mechanism; and the output end of the coarse and fine coal slime dewatering screen is connected to the input end of the coarse tail coal slime collection mechanism.
[0011] Compared with existing technologies, this utility model provides a coarse coal slime purification device for coal preparation plants, which has the following beneficial effects: This coarse coal slime purification device for coal preparation plants separately recovers the gangue and dilute medium magnetic tailings separated by the heavy medium system, and directly dewaters and recovers them using a three-mass high-frequency fine screen, without entering the coal slime grading and sorting stage. This achieves the separation and graded treatment of fine gangue from the tailings of the dilute medium magnetic separator, avoiding repeated and ineffective sorting of gangue in the coarse coal slime; reduces the phenomenon of "back ash" in coarse and fine coal slime; reduces the processing volume of the coal slime grading and sorting system; reduces the number of equipment models required for the coarse coal slime grading and sorting system; reduces the power consumption of coal slime water treatment; and reduces the operating costs of the coal preparation plant. The entire coarse coal slime purification device has a simple structure, is easy to operate, and has better performance than traditional methods. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of a coarse coal slime purification device for a coal preparation plant according to the present invention.
[0013] Figure 2 This is a schematic diagram of the structure of a gangue dilute medium magnetic separator in a coarse coal slime purification device for a coal preparation plant according to the present invention.
[0014] Figure 3 This is a schematic diagram of the structure of a coal slime grading cyclone in a coal preparation plant coarse coal slime purification device according to the present invention.
[0015] Figure 4 This is a schematic diagram of the structure of a coarse and fine coal slime dewatering screen in a coarse coal slime purification device for a coal preparation plant according to the present invention.
[0016] In the diagram: 1. Coal desliming under-screen dilute medium system; 2. Gangue desliming under-screen dilute medium system; 3. Coal dilute medium magnetic separator; 4. Gangue dilute medium magnetic separator; 5. Concentrate heavy medium system; 6. Coal slime grading hydrocyclone; 7. Coarse and fine coal slime arc screen; 8. Coarse coal slime separator; 9. Coarse and fine coal slime centrifuge; 10. Coarse and fine coal slime dewatering screen; 11. Fine coal slime collection mechanism; 12. Coarse and fine coal slime collection mechanism; 13. Coarse and tailings coal slime collection mechanism; 14. First conveying pipe; 15. Second conveying pipe; 16. Third conveying pipe; 17. Fourth conveying pipe. Detailed Implementation
[0017] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings and specific embodiments.
[0018] like Figure 1-4As shown, a coarse coal slime purification device for a coal preparation plant includes a clean coal desliming under-screen dilute medium system 1 and a gangue desliming under-screen dilute medium system 2. The clean coal desliming under-screen dilute medium system 1 is connected to a clean coal dilute medium magnetic separator 3, and the gangue desliming under-screen dilute medium system 2 is connected to a gangue dilute medium magnetic separator 4. Both the clean coal dilute medium magnetic separator 3 and the gangue dilute medium magnetic separator 4 are connected to a concentrate heavy medium system 5 and a coal slime classifying hydrocyclone 6. The coal slime classifying hydrocyclone 6 is connected to a coarse coal slime separator 8 and a fine coal slime collection mechanism 11. The coarse coal slime separator 8 is connected to both coarse and clean coal slime. An arc-shaped screen 7 is connected to a coarse and fine coal slime centrifuge 9, which in turn is connected to a coarse and fine coal slime collection mechanism 12. Both the coarse coal slime separator 8 and the gangue dilute medium magnetic separator 4 are connected to a coarse and fine coal slime dewatering screen 10, which is connected to a coarse tailings coal slime collection mechanism 13. By separately recovering the gangue dilute medium magnetic tailings separated by the heavy medium system, and directly dewatering and recovering them using a high-frequency fine screen, without them entering the coal slime grading and sorting stage, the separation and quality-differentiated treatment of fine gangue from the tailings of the dilute medium magnetic separator is achieved. Compared with the traditional method of having the gangue dilute medium magnetic tailings enter the coal slime grading and sorting system: it avoids the repeated and ineffective separation of gangue in the coarse coal slime; reduces the phenomenon of "back ash" in the coarse and fine coal slime; reduces the processing capacity of the coal slime grading and sorting system; reduces the number of equipment models required for the coarse coal slime grading and sorting system; reduces the power consumption of coal slime water treatment; and reduces the operating costs of the coal preparation plant.
[0019] A first conveying pipe 14 connects the coal desliming under-screen dilute medium system 1 to the coal dilute medium magnetic separator 3. A second conveying pipe 15 connects the gangue desliming under-screen dilute medium system 2 to the gangue dilute medium magnetic separator 4. A concentrate heavy medium system 5 connects the coal dilute medium magnetic separator 3, the gangue dilute medium magnetic separator 4, and the third conveying pipe 16.
[0020] A fourth conveying pipe 17 is connected between the fine coal dilute medium magnetic separator 3 and the coal slime grading hydrocyclone 6, between the gangue dilute medium magnetic separator 4 and the coal slime grading hydrocyclone 6 and the coarse and fine coal slime dewatering screen 10, between the coal slime grading hydrocyclone 6 and the fine coal slime collection mechanism 11 and the coarse coal slime separator 8, between the coarse coal slime separator 8 and the coarse and fine coal slime arc screen 7 and the coarse and fine coal slime dewatering screen 10, and between the coarse and fine coal slime arc screen 7 and the coarse and fine coal slime centrifuge 9.
[0021] The clean coal desliming under-screen dilute medium system 1 and the clean coal dilute medium magnetic separator 3 are connected through a first conveying pipe 14. The gangue desliming under-screen dilute medium system 2 and the gangue dilute medium magnetic separator 4 are connected through a second conveying pipe 15. The clean coal dilute medium magnetic separator 3, the gangue dilute medium magnetic separator 4 and the concentrate heavy medium system 5 are all connected through a third conveying pipe 16.
[0022] The following connections are made through the fourth conveying pipe 17: the fine coal dilute medium magnetic separator 3 and the coal slime grading hydrocyclone 6; the gangue dilute medium magnetic separator 4 and the coal slime grading hydrocyclone 6 and the coarse and fine coal slime dewatering screen 10; the coal slime grading hydrocyclone 6 and the fine coal slime collection mechanism 11 and the coarse coal slime separator 8; the coarse coal slime separator 8 and the coarse and fine coal slime arc screen 7 and the coarse and fine coal slime dewatering screen 10; and the coarse and fine coal slime arc screen 7 and the coarse and fine coal slime centrifuge 9.
[0023] The output end of the under-screen dilute medium system 1 for clean coal desliming is connected to the input end of the clean coal dilute medium magnetic separator 3. The output end of the under-screen dilute medium system 2 for gangue desliming is connected to the input end of the gangue dilute medium magnetic separator 4. The output ends of the clean coal dilute medium magnetic separator 3 and the gangue dilute medium magnetic separator 4 are connected to the input ends of the concentrate heavy medium system 5 and the coal slime classifying hydrocyclone 6. The output end of the coal slime classifying hydrocyclone 6 is connected to the coarse coal slime separator 8 and the fine coal slime collection mechanism. The input end of 11 is connected to the input end of the coarse coal slime separator 8, the output end of the coarse and fine coal slime arc screen 7 and the coarse and fine coal slime dewatering screen 10 are connected to the input end of the coarse and fine coal slime centrifuge 9, the output end of the coarse and fine coal slime centrifuge 9 is connected to the input end of the coarse and fine coal slime collection mechanism 12, and the output end of the coarse and fine coal slime dewatering screen 10 is connected to the input end of the coarse tail coal slime collection mechanism 13.
[0024] Working principle: This utility model includes a fine coal desliming under-screen dilute medium system 1, a gangue desliming under-screen dilute medium system 2, a fine coal dilute medium magnetic separator 3, a gangue dilute medium magnetic separator 4, a concentrate heavy medium system 5, a coal slime grading hydrocyclone 6, a coarse and fine coal slime arc screen 7, a coarse coal slime separator 8, a coarse and fine coal slime centrifuge 9, a coarse and fine coal slime dewatering screen 10, a fine coal slime collection mechanism 11, a coarse and fine coal slime collection mechanism 12, a coarse tailings coal slime collection mechanism 13, a first conveying pipe 14, a second conveying pipe 15, a third conveying pipe 16, and a fourth conveying pipe 17. The dilute medium from the heavy medium system is independently recovered.
[0025] In the heavy media system, the dilute medium under the clean coal desliming screen is fed separately into the clean coal dilute medium magnetic separator;
[0026] In the heavy medium system, the dilute medium under the gangue desliming screen is fed separately into the gangue dilute medium magnetic separator;
[0027] The traditional method of mixing clean coal and gangue in a dilute medium before feeding them into the magnetic separator has been eliminated.
[0028] 2. Dilute medium magnetic separator concentrate recovery and processing:
[0029] A qualified medium system for returning concentrate to heavy medium in a dilute medium magnetic separator for clean coal;
[0030] A qualified medium system for returning concentrate from a rare media magnetic separator for gangue to a heavy medium;
[0031] 3. Tailings treatment of refined coal using dilute medium magnetic separators:
[0032] Tailings from the dilute medium magnetic separator for refined coal enter the coal slime grading and separation system, where an advanced grading hydrocyclone separates the coal slime into coarse and fine coal slime.
[0033] Fine coal slime is fed into the subsequent thickening system;
[0034] Coarse coal slime enters the coarse coal slime separator, which separates coarse fine coal slime and coarse tailings coal slime.
[0035] After being dewatered by a combination of an arc screen and a centrifuge, coarse coal slime becomes fine coal slime product.
[0036] After being dewatered by a three-phase high-frequency fine screen, the coarse tailings become tailings products.
[0037] 4. Tailings treatment of gangue using rare media magnetic separators:
[0038] Under normal coal quality conditions, the tailings of the gangue rare media magnetic separator are directly dewatered by a three-mass high-frequency fine screen to become tailings products.
[0039] When the coal quality is abnormal or poor, and the tailings of the gangue dilute medium magnetic separator need to be sorted, they can be processed by entering the coal slime grading and sorting system through an analog quantity control valve.
[0040] Through the above process, efficient separation and treatment of tailings from the dilute medium magnetic separator in the heavy medium system is achieved. The basic principles, main features, and advantages of this utility model have been shown and described above. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A coal preparation plant coarse slime purification device, comprising a clean coal medium removal screen underdilute medium system (1) and a gangue medium removal screen underdilute medium system (2), characterized in that: The clean coal dilute medium system (1) is connected with a clean coal dilute medium magnetic separator (3), the gangue dilute medium system (2) is connected with a gangue dilute medium magnetic separator (4), the clean coal dilute medium magnetic separator (3) and the gangue dilute medium magnetic separator (4) are connected with a clean coal heavy medium system (5) and a slime grading cyclone (6), the slime grading cyclone (6) is connected with a coarse slime separator (8) and a fine slime collecting mechanism (11), the coarse slime separator (8) is connected with a coarse clean slime screen (7), the coarse clean slime screen (7) is connected with a coarse clean slime centrifuge (9), the coarse clean slime centrifuge (9) is connected with a coarse clean slime collecting mechanism (12), the coarse slime separator (8) and the gangue dilute medium magnetic separator (4) are connected with a coarse clean slime dewatering screen (10), and the coarse clean slime dewatering screen (10) is connected with a coarse tail coal slime collecting mechanism (13).
2. The rough coal slime purification device of a coal preparation plant according to claim 1, characterized in that: The first feeding pipe (14) is connected between the clean coal dilute medium system (1) and the clean coal dilute medium magnetic separator (3), the second feeding pipe (15) is connected between the gangue dilute medium system (2) and the gangue dilute medium magnetic separator (4), and the clean coal dilute medium magnetic separator (3), the gangue dilute medium magnetic separator (4) and the third feeding pipe (16) are connected.
3. The coal preparation plant coarse slime purification device according to claim 1, characterized in that: The fourth feeding pipe (17) is connected between the clean coal dilute medium magnetic separator (3) and the slime grading cyclone (6), between the gangue dilute medium magnetic separator (4) and the slime grading cyclone (6) and the coarse clean slime dewatering screen (10), between the slime grading cyclone (6) and the fine slime collecting mechanism (11) and the coarse slime separator (8), between the coarse slime separator (8) and the coarse clean slime screen (7) and the coarse clean slime dewatering screen (10), and between the coarse clean slime screen (7) and the coarse clean slime centrifuge (9).
4. The coal preparation plant coarse slime purification device according to claim 2, characterized in that: The first feeding pipe (14) is connected between the clean coal dilute medium system (1) and the clean coal dilute medium magnetic separator (3), the second feeding pipe (15) is connected between the gangue dilute medium system (2) and the gangue dilute medium magnetic separator (4), and the clean coal dilute medium magnetic separator (3), the gangue dilute medium magnetic separator (4) and the third feeding pipe (16) are connected.
5. The coal preparation plant coarse coal slime purification device according to claim 3, characterized in that: The fourth feeding pipe (17) is connected between the clean coal dilute medium magnetic separator (3) and the slime grading cyclone (6), between the gangue dilute medium magnetic separator (4) and the slime grading cyclone (6) and the coarse clean slime dewatering screen (10), between the slime grading cyclone (6) and the fine slime collecting mechanism (11) and the coarse slime separator (8), between the coarse slime separator (8) and the coarse clean slime screen (7) and the coarse clean slime dewatering screen (10), and between the coarse clean slime screen (7) and the coarse clean slime centrifuge (9).
6. The coal preparation plant coarse coal slime purification device according to claim 1, characterized in that: The output end of the clean coal medium-removal under-screen system (1) is connected with the input end of the clean coal medium-lean system (3), the output end of the gangue medium-removal under-screen system (2) is connected with the input end of the gangue medium-lean system (4), the output ends of the clean coal medium-lean system (3) and the gangue medium-lean system (4) are connected with the input ends of the concentrate heavy medium system (5) and the coal slime grading cyclone (6), the output end of the coal slime grading cyclone (6) is connected with the input ends of the coarse coal slime separator (8) and the fine coal slime collecting mechanism (11), the output end of the coarse coal slime separator (8) is connected with the input ends of the coarse clean coal slime arc screen (7) and the coarse clean coal slime dehydration screen (10), the output end of the coarse clean coal slime arc screen (7) is connected with the input end of the coarse clean coal slime centrifuge (9), the output end of the coarse clean coal slime centrifuge (9) is connected with the input end of the coarse clean coal slime collecting mechanism (12), and the output end of the coarse clean coal slime dehydration screen (10) is connected with the input end of the coarse tail coal slime collecting mechanism (13).