A separating device for extracting clean coal from slime and gangue
By using multi-stage electric actuators to control the opening and closing of the screen plates in the flotation separator, combined with the design of inclined plates and baffles, the problem of clean coal sinking was solved, the separation efficiency and yield of clean coal were improved, and the complete extraction of clean coal was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-06-18
- Publication Date
- 2026-07-14
AI Technical Summary
In existing technologies, during the flotation separation of clean coal, some clean coal particles are extracted along with the bottom sediment, resulting in a reduction in clean coal yield.
A flotation separator is used, and the opening and closing of the screen is controlled by a multi-stage electric actuator. Combined with the design of inclined plates and baffles, it ensures that the clean coal does not sink during the flotation process. An oscillating agitator is used to accelerate the separation, and a one-way valve is set to prevent the flotation liquid from flowing back when aeration stops.
It improves the separation efficiency and yield of clean coal, ensures the complete extraction of clean coal, avoids the sinking and carrying away of clean coal particles, and improves the efficiency of the separation unit.
Smart Images
Figure CN224486290U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of refined coal production, specifically a separation device for extracting refined coal from coal slime and gangue. Background Technology
[0002] Clean coal refers to high-quality coal obtained after coal washing to remove gangue. The current process for obtaining clean coal is as follows: 1. Crushing gangue; 2. Preparing coal slime; 3. Flotation separation; 4. Cleaning treatment; 5. Dewatering treatment; 6. Drying treatment. Flotation separation and cleaning treatment separate the clean coal through flotation. However, because clean coal has a lower density and floats on top, the bottom sediment is first extracted before the top clean coal is extracted. In actual operation, aeration stops when the bottom sediment is extracted, and the extraction causes the floating clean coal particles on top to shake, which may cause some clean coal to sink and be extracted along with the bottom sediment, resulting in a decrease in clean coal yield. Utility Model Content
[0003] This invention provides a separation device for extracting clean coal from coal slime and gangue, thereby overcoming the deficiencies in the prior art.
[0004] This utility model is achieved through the following technical solution:
[0005] A separation device for extracting clean coal from coal slime and gangue includes a flotation separator. The top of the flotation separator is connected to a flotation liquid inlet pipe and a pulverized coal slime and gangue inlet pipe. Two screens are installed in the middle of the flotation separator. The side of the two screens away from their adjacent parts is hinged to the interior of the flotation separator. The bottom of the screens is hinged to one end of a waterproof multi-stage electric actuator. The other end of the multi-stage electric actuator is hinged to the lower side wall of the flotation separator. The lower part of the flotation separator is connected to an aeration inlet pipe. One side of the bottom of the flotation separator is connected to a coal slime and gangue discharge pipe. A first solenoid valve and a first mud pump are installed on the coal slime and gangue discharge pipe. The other side of the bottom of the flotation separator is connected to a clean coal discharge pipe. A second solenoid valve and a second mud pump are installed on the clean coal discharge pipe.
[0006] As described above, in a separation device for extracting clean coal from coal slime and gangue, an inclined plate is provided below the screen plate. The lowest end of the inclined plate is fixedly connected to the lower side wall of the flotation separator. The end of the screen plate away from the hinged connection can be moved to a position lower than the highest point of the inclined plate.
[0007] As described above, a separation device for extracting clean coal from coal slime and gangue has a baffle plate installed on the upper part of the inclined plate, which is able to contact the end of the mesh plate away from the hinged connection.
[0008] The separation device for extracting clean coal from coal slime and gangue as described above, wherein a vibrating agitator is installed at the bottom of the flotation separator.
[0009] As described above, in a separation device for extracting clean coal from coal slime and gangue, a one-way valve is installed on the aeration inlet pipe.
[0010] The advantages of this invention are: This invention uses two multi-stage electric actuators to control the opening and closing of two screens. During flotation, the two multi-stage electric actuators retract, causing the two screens to open, ensuring smooth flotation. After flotation, the two multi-stage electric actuators extend, causing the two screens to close. When removing bottom sediment, the blocking effect of the closed screens prevents even clean coal particles from sinking. After the bottom sediment is removed, the two multi-stage electric actuators retract, causing the two screens to open, extracting the clean coal and thus ensuring clean coal production. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This is a schematic diagram of the structure of this utility model.
[0013] Reference numerals in the attached diagram: 1. Flotation separator; 2. Flotation liquor inlet pipe; 3. Coal slime and gangue inlet pipe; 4. Screen plate; 5. Multi-stage electric actuator; 6. Aeration inlet pipe; 7. Coal slime and gangue outlet pipe; 8. First solenoid valve; 9. First mud pump; 10. Clean coal outlet pipe; 11. Second solenoid valve; 12. Second mud pump; 13. Inclined plate; 14. Baffle; 15. Vibrating agitator; 16. Check valve. Detailed Implementation
[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0015] like Figure 1As shown, a separation device for extracting clean coal from coal slime and gangue includes a flotation separator 1. The top of the flotation separator 1 is connected to a flotation liquid inlet pipe 2 and a pulverized coal slime and gangue inlet pipe 3. Two screen plates 4 are arranged in the middle of the flotation separator 1. The side of the two screen plates 4 away from their adjacent parts is hinged to the inside of the flotation separator 1. The bottom of the screen plates 4 is hinged to one end of a waterproof multi-stage electric actuator 5. The other end of the multi-stage electric actuator 5 is hinged to the lower side wall of the flotation separator 1. The lower part of the flotation separator 1 is connected to an aeration inlet pipe 6. One side of the bottom of the flotation separator 1 is connected to a coal slime and gangue discharge pipe 7. A first solenoid valve 8 and a first mud pump 9 are arranged on the coal slime and gangue discharge pipe 7. The other side of the bottom of the flotation separator 1 is connected to a clean coal discharge pipe 10. A second solenoid valve 11 and a second mud pump 12 are arranged on the clean coal discharge pipe 10. In this invention, crushed coal slime and gangue are added through the inlet pipe 3, followed by flotation liquid through the flotation liquid inlet pipe 2. Gas is continuously introduced through the aeration inlet pipe 6 to accelerate the flotation operation. Two multi-stage electric actuators 5 control the opening and closing of two screen plates 4. During flotation, the two actuators 5 retract, causing the screen plates 4 to open, ensuring successful flotation. After flotation, the two actuators 5 extend, causing the screen plates 4 to close. When removing bottom sediment, the closed screen plates 4 act as a barrier, intercepting even sinking clean coal particles. After the bottom sediment is removed, the two actuators 5 retract, causing the screen plates 4 to open, thus extracting the clean coal and ensuring clean coal production.
[0016] Specifically, during the flotation process, clean coal may move to the lower part of the screen plate 4 and be blocked, preventing it from rising above the screen plate 4. This can cause the clean coal below the screen plate 4 to be extracted along with the bottom sediment, thus affecting the clean coal yield. To overcome this problem, in this embodiment, an inclined plate 13 is provided below the screen plate 4. The lowest end of the inclined plate 13 is fixedly connected to the lower side wall of the flotation separator 1, and the end of the screen plate 4 away from the hinged connection can be moved to a position lower than the highest point of the inclined plate 13. This invention, through the setting of the inclined plate 13, can guide the floating clean coal, preventing it from moving below the screen plate 4 during the flotation process, thereby ensuring clean coal separation efficiency and clean coal yield.
[0017] Specifically, in this embodiment, a baffle 14 is provided on the upper part of the inclined plate 13, and the baffle 14 can contact the end of the screen plate 4 away from the hinged connection. This utility model uses the baffle 14 to block the gap between the screen plate 4 and the inclined plate 13, thereby preventing clean coal particles from moving from between the screen plate 4 and the inclined plate 13 to below the screen plate 4, thus ensuring clean coal separation efficiency and clean coal production.
[0018] Furthermore, in this embodiment, a vibrating agitator 15 is installed at the bottom of the flotation separator 1. This invention uses the vibrating agitator 15 to accelerate the flotation separation of clean coal and improve separation efficiency.
[0019] Furthermore, a one-way valve 16 is provided on the aeration inlet pipe 6 described in this embodiment. The one-way valve 16 prevents the flotation liquid from flowing back into the aeration inlet pipe 6 after aeration is stopped, ensuring the normal operation of this invention.
[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A separation device for extracting clean coal from coal slime and gangue, characterized in that: The system includes a flotation separator (1), the top of which is connected to the flotation liquid inlet pipe (2) and the crushed coal slime and gangue inlet pipe (3). Two screen plates (4) are installed in the middle of the flotation separator (1). The side of the two screen plates (4) furthest from their adjacent parts is hinged to the interior of the flotation separator (1). The bottom of the screen plates (4) is hinged to one end of a waterproof multi-stage electric actuator (5), and the other end of the multi-stage electric actuator (5) is connected to the flotation separator (1). The lower side wall is hinged. The lower part of the flotation separator (1) is connected to the aeration inlet pipe (6). One side of the bottom of the flotation separator (1) is connected to the coal slime and gangue discharge pipe (7). The coal slime and gangue discharge pipe (7) is equipped with a first solenoid valve (8) and a first mud pump (9). The other side of the bottom of the flotation separator (1) is connected to the clean coal discharge pipe (10). The clean coal discharge pipe (10) is equipped with a second solenoid valve (11) and a second mud pump (12).
2. The separation device for extracting clean coal from coal slime and gangue according to claim 1, characterized in that: An inclined plate (13) is provided below the screen plate (4). The lowest end of the inclined plate (13) is fixedly connected to the lower side wall of the flotation separator (1). The end of the screen plate (4) away from the hinged connection can be moved to a position lower than the highest point of the inclined plate (13).
3. The separation device for extracting clean coal from coal slime and gangue according to claim 2, characterized in that: A baffle (14) is provided on the upper part of the inclined plate (13), and the baffle (14) can contact the end of the mesh plate (4) away from the hinge connection.
4. The separation device for extracting clean coal from coal slime and gangue according to claim 1, characterized in that: The flotation separator (1) is equipped with an oscillating agitator (15) at the bottom.
5. The separation device for extracting clean coal from coal slime and gangue according to claim 1, characterized in that: A one-way valve (16) is provided on the aeration inlet pipe (6).