Preparation device of coal-based solid waste filling paste

Abstract

The invention relates to the technical field of coal-based solid waste paste preparation, and discloses a coal-based solid waste filling paste preparation device which comprises a smashing and screening tank, a feeding port is formed in the top end of the smashing and screening tank, and two smashing rollers are installed in the smashing and screening tank and located under the feeding port; the screening assembly comprises a magnetic separation part and a screening part, the magnetic separation part and the screening part are both arranged in the smashing and screening tank, the magnetic separation part is located under the smashing roller and used for conducting magnetic separation and screening on the smashed materials, and the screening part is located under the magnetic separation part and used for conducting vibration screening on the materials subjected to magnetic separation; the stirring assembly comprises a stirring tank and a stirring part, the stirring tank communicates with the crushing and screening tank, and the stirring part is arranged in the stirring tank and used for stirring materials; and the detection part is arranged on the stirring tank and is used for detecting the consistency, the pH value and the temperature of the material. The problems of low activity, non-uniform particle size, low magnetic separation efficiency, difficulty in homogenization and the like in the traditional technology are solved, and technical support is provided for green mining of mines.

Description

Technical Field

[0001] This invention relates to the field of coal-based solid waste paste preparation technology, and in particular to a preparation apparatus for coal-based solid waste filling paste. Background Technology

[0002] The annual emissions of coal-based solid waste (such as coal gangue and fly ash) have exceeded 1.5 billion tons, with a cumulative accumulation of over 7 billion tons, occupying more than 2 million mu of land resources, and easily causing environmental problems such as soil pollution and water acidification. Traditional mine backfill materials mostly rely on cement-based cementitious materials, whose production costs account for 60%-80% of the total backfill cost, and each ton of cement production generates approximately 0.8 tons of CO2. In existing technologies, the application of coal-based solid waste as backfill material is limited by the following issues:

[0003] Low activity: Although coal gangue has high SiO2 and Al2O3 content, its crystal structure is stable and requires mechanical activation to release its activity.

[0004] Uneven particle size: Poor particle size distribution of ungraded solid waste results in high bleeding rate (>10%) and low strength (<1.0MPa) of paste;

[0005] Low magnetic separation efficiency: Traditional magnetic separators can only process once, and the removal rate of iron impurities is less than 85%, which affects the subsequent gelation reaction.

[0006] Therefore, there is an urgent need for a device for preparing coal-based solid waste backfill paste to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a device for preparing coal-based solid waste backfill paste, so as to solve the problems existing in the prior art.

[0008] To achieve the above objectives, the present invention provides the following solution: The present invention provides an apparatus for preparing coal-based solid waste backfill paste, comprising:

[0009] The crushing and screening tank has a feeding port at the top, and two crushing rollers are installed inside the crushing and screening tank, with the two crushing rollers located directly below the feeding port;

[0010] The screening assembly includes a magnetic separator and a screening element, both of which are disposed inside the crushing and screening tank. The magnetic separator is located directly below the crushing roller and is used to magnetically separate and screen the crushed material. The screening element is located directly below the magnetic separator and is used to vibrate and screen the magnetically separated material.

[0011] A mixing assembly includes a mixing tank and a mixing element, wherein the mixing tank is connected to the crushing and screening tank, and the mixing element is disposed in the mixing tank for mixing materials;

[0012] The testing device is installed on the mixing tank to detect the consistency, pH value and temperature of the material.

[0013] According to the present invention, a preparation device for coal-based solid waste filling paste is provided. The magnetic separator includes a support fixedly connected inside the crushing and screening tank. A receiving tank is fixedly connected to the support. Permanent magnet rollers are rotatably connected to both ends of the support. The permanent magnet rollers slide in contact with the outer wall of the receiving tank. The crushed material is guided to the permanent magnet rollers for magnetic separation and screening. A circulating screening component is provided inside the receiving tank. The circulating screening component is used to guide the material in the receiving tank to the permanent magnet rollers.

[0014] According to the present invention, a preparation device for coal-based solid waste filling paste is provided, wherein the circulating screening component includes two rows of circulating components, the circulating components include several conveying pipes, the several conveying pipes are fixedly connected in the receiving tank along the axial direction, and the bottom and top of the conveying pipes are respectively provided with an inlet and an outlet on the side near the inner wall of the receiving tank, and a spiral conveying roller is installed inside the conveying pipe.

[0015] According to the present invention, a preparation device for coal-based solid waste filling paste is provided, wherein a guide cover is fixedly connected to the support, the guide cover is located at the top of the conveying pipe, and the guide cover has an inverted V-shaped structure, and a guide plate is fixedly connected to the discharge port, and the guide cover and the guide plate respectively guide the crushed material to the permanent magnet drum.

[0016] According to the present invention, a preparation device for coal-based solid waste filling paste is provided, wherein a collection tank is fixedly connected to both outer walls of the receiving tank, the collection tank is located below the permanent magnet drum, and a discharge port is provided on both side walls of the receiving tank. A sealing plate is hinged to the discharge port, and the sealing plate is hinged to the collection tank by an electric telescopic rod. When the sealing plate is opened, a discharge channel is formed between the sealing plate, the discharge port and the collection tank.

[0017] According to the present invention, a preparation device for coal-based solid waste filling paste is provided, wherein the screening component includes a screening frame, a screen is disposed inside the screening frame, a vibrating element is disposed on the screening frame, the screen is slidably connected to the screening frame through the vibrating element, a rotating shaft is fixedly connected to each of the two opposite outer walls of the screening frame, the rotating shaft is rotatably connected to the crushing and screening tank, one of the rotating shafts extends out of the crushing and screening tank and is fixedly connected to a gear, and a toothed plate is connected to the outer wall of the crushing and screening tank through a cylinder, the gear meshing with the toothed plate.

[0018] According to the present invention, a preparation device for coal-based solid waste filling paste is provided, wherein the screening frame has grooves on both inner sidewalls, the vibrating element is fixedly connected to the sliding rod in the groove, the screen is slidably connected to the sliding rod, a cam is rotatably connected in the groove through a connecting shaft, the cam contacts the top of the screen, a first motor is fixedly connected in the screening frame, and one end of the connecting shaft is fixedly connected to the output shaft of the first motor.

[0019] According to the present invention, a preparation device for coal-based solid waste filling paste is provided, wherein the stirring component includes a stirring shaft rotatably connected to the stirring tank, a plurality of stirring rods are fixedly connected to the stirring shaft, a second motor is fixedly connected to the stirring tank, and one end of the stirring shaft is fixedly connected to the output shaft of the second motor.

[0020] According to the present invention, a preparation device for coal-based solid waste backfill paste is provided, wherein the detection element includes a detection module fixedly connected to the mixing tank, and the detection module is used to detect the consistency, pH and temperature of the material in the mixing tank.

[0021] According to the present invention, a preparation device for coal-based solid waste filling paste is provided, wherein a spring is sleeved on the slide rod, and the two ends of the spring are fixedly connected to the bottom end of the slide groove and the bottom end of the screen respectively. A cleaning frame is fixedly connected to the bottom end of the screening frame, and a plurality of cleaning heads are fixedly connected to the cleaning frame, wherein the cleaning heads are adapted to the mesh of the screen.

[0022] Compared with the prior art, the present invention has the following advantages and technical effects:

[0023] This invention provides a device for preparing coal-based solid waste filling paste. The material is first crushed by a crushing roller, then subjected to cyclic magnetic separation and sieving by a magnetic separator to avoid missed particles in a single magnetic separation. After magnetic separation and sieving, the material is sieved to a specified particle size by a screening device. Finally, the material is stirred and prepared by a stirring device, and the consistency, pH value, and temperature of the material are monitored in real time by a detection device. This application realizes the crushing, magnetic separation, screening, and stirring preparation of coal-based solid waste filling paste, solving problems such as low activity, uneven particle size, low magnetic separation efficiency, and difficulty in homogenization in traditional technologies, providing technical support for green mining. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the magnetic separator structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the screening component structure of the present invention;

[0028] Figure 4 This is a front view of the crushing and screening tank of the present invention;

[0029] The components are as follows: 1. Crushing and screening tank; 2. Feeding port; 3. Crushing roller; 4. Mixing tank; 5. Support; 6. Receiving trough; 7. Permanent magnet drum; 8. Conveying pipe; 9. Feed inlet; 10. Discharge outlet; 11. Screw conveying roller; 12. Guide cover; 13. Guide plate; 14. Collection trough; 15. Discharge outlet; 16. Sealing plate; 17. Electric telescopic rod; 18. Screening frame; 19. Screen; 20. Rotating shaft; 21. Gear; 22. Cylinder; 23. Tooth plate; 24. Slide groove; 25. Slide rod; 26. Connecting shaft; 27. Cam; 28. First motor; 29. ​​Mixing shaft; 30. Mixing rod; 31. Second motor; 32. Detection module; 33. Spring; 34. Cleaning frame; 35. Cleaning head. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Paste backfilling mining technology can not only effectively release coal under pressure from the "three underground" areas and improve the coal resource recovery rate, but the backfilling material is the core of the entire backfilling system. Currently, the main backfilling material is coal gangue. In the preparation process, screened fly ash, gasification slag, bottom ash and desulfurized gypsum fine particles are usually mixed with flocculants to form a high-concentration slurry paste to achieve the preparation of the paste.

[0033] A related technology discloses a preparation device and method for coal-based solid waste filling paste, relating to the field of coal-based solid waste filling paste preparation technology. One such device includes a processing platform and a support frame. A cylinder cover is installed on the upper part of the cylinder, and a linkage component is installed on the upper part of the cylinder cover. A material-blocking component is installed below the front side of the processing platform. Through the cooperation between the sliding platform, drive motor, cylinder cover, vertical cylinder, agitator, external rack, internal rack, and bottom beam, in the open state, the agitator is closer to the cylinder cover; in the closed state, the agitator penetrates deeper into the cylinder for mixing. When the agitator is removed, it can be removed by moving the sliding platform halfway, effectively avoiding the need to move a greater distance during agitator removal to proceed with subsequent loading and unloading processes. This avoids the problem of low loading and unloading efficiency during cylinder replacement, which affects the overall processing efficiency.

[0034] The aforementioned related technologies can only achieve material mixing, but do not include material crushing and screening before mixing. Therefore, in order to solve the above problems, this application provides the following technical solution:

[0035] Reference Figures 1-4 This invention provides an apparatus for preparing coal-based solid waste backfill paste, comprising:

[0036] The crushing and screening tank 1 has a feeding port 2 at the top. Two crushing rollers 3 are installed inside the crushing and screening tank 1, and the two crushing rollers 3 are located directly below the feeding port 2.

[0037] The screening assembly includes a magnetic separator and a screening component. Both the magnetic separator and the screening component are installed inside the crushing and screening tank 1. The magnetic separator is located directly below the crushing roller 3 and is used to magnetically separate and screen the crushed material. The screening component is located directly below the magnetic separator and is used to vibrate and screen the magnetically separated material.

[0038] The mixing assembly includes a mixing tank 4 and a mixing element. The mixing tank 4 is connected to the crushing and screening tank 1, and the mixing element is installed in the mixing tank 4 for mixing materials.

[0039] The testing device, installed on mixing tank 4, is used to test the consistency, pH value, and temperature of the material.

[0040] In one embodiment of the present invention, the material is first crushed by the crushing roller 3, and then circulated magnetic separation and screening is performed by the set magnetic separator to avoid the problem of missed screening in a single magnetic separation. After the magnetic separation and screening is completed, the material of a specified particle size is screened by the set screening element. After the screening is completed, the material is stirred and prepared by the set stirring element, and the consistency, pH value and temperature of the material are monitored in real time by the set detection element.

[0041] As an optional implementation, the magnetic separator includes a support 5, which is fixedly connected inside the crushing and screening tank 1. A receiving trough 6 is fixedly connected to the support 5. Permanent magnet rollers 7 are rotatably connected to both ends of the support 5. The permanent magnet rollers 7 slide in contact with the outer wall of the receiving trough 6. The crushed material is guided to the permanent magnet rollers 7 for magnetic separation and screening. A circulating screening component is provided in the receiving trough 6. The circulating screening component is used to guide the material in the receiving trough 6 to the permanent magnet rollers 7.

[0042] In one embodiment of the present invention, the double permanent magnet roller 7 slides in contact with the receiving trough 6 to form a closed magnetic separation circuit for magnetic separation and screening of materials.

[0043] As an optional implementation, the circulating screening component includes two rows of circulating components. The circulating components include several conveying pipes 8, which are fixedly connected axially in the receiving trough 6. The bottom and top of the conveying pipes 8 are respectively provided with an inlet 9 and an outlet 10 on the side near the inner wall of the receiving trough 6. A spiral conveying roller 11 is installed inside the conveying pipe 8.

[0044] In one embodiment of the present invention, the spiral conveying roller 11 inside the conveying pipe 8 reintroduces the unadsorbed material into the magnetic separation zone. The number of times the material comes into contact with the magnetic roller is increased by 3 times through the circulating screening component, avoiding the problem of missed screening in a single magnetic separation. The closed loop design reduces material scattering, and the spiral conveying roller forces the material to circulate, increasing the processing capacity per unit time by 25%.

[0045] As an optional implementation, a guide cover 12 is fixedly connected to the support 5. The guide cover 12 is located at the top of the conveying pipe 8 and has an inverted V-shaped structure. A guide plate 13 is fixedly connected to the discharge port 10. The guide cover 12 and the guide plate 13 respectively guide the crushed material to the permanent magnet drum 7.

[0046] In one embodiment of the present invention, the guide cover 12 is used to guide the crushed material to the permanent magnet drum 7, and the guide plate 13 is used to guide the material in the conveying pipe 8 to the permanent magnet drum 7.

[0047] As an optional implementation, a collection tank 14 is fixedly connected to both outer walls of the receiving tank 6. The collection tank 14 is located below the permanent magnet roller 7. A discharge port 15 is opened on both side walls of the receiving tank 6. A sealing plate 16 is hinged to the discharge port 15. The sealing plate 16 is hinged to the collection tank 14 through an electric telescopic rod 17. When the sealing plate 16 is opened, a discharge channel is formed between the sealing plate 16, the discharge port 15 and the collection tank 14.

[0048] In one embodiment of the present invention, the collection tank 14 is used to collect the impurities adsorbed by the permanent magnet drum 7. The sealing plate 16 is opened by the electric telescopic rod 17, and the material adsorbed above falls to the screening piece below through the discharge channel for screening.

[0049] As an optional implementation, the screening component includes a screening frame 18, a screen 19 disposed inside the screening frame 18, a vibrating element disposed on the screening frame 18, the screen 19 being slidably connected to the screening frame 18 via the vibrating element, and a rotating shaft 20 being fixedly connected to both opposite outer walls of the screening frame 18, the rotating shaft 20 being rotatably connected to the crushing and screening tank 1, one of the rotating shafts 20 extending out of the crushing and screening tank 1 and being fixedly connected to a gear 21, a toothed plate 23 being connected to the outer wall of the crushing and screening tank 1 via a cylinder 22, the gear 21 meshing with the toothed plate 23.

[0050] In one embodiment of the present invention, the cylinder 22 drives the toothed plate 23 to move, and the toothed plate 23 drives the gear 21 to rotate, thereby controlling the tilt angle of the screening frame 18. The screening angle is adjusted from 0° to 15°. The tilting avoids material accumulation and ensures screening efficiency.

[0051] As an optional implementation, the screening frame 18 has grooves 24 on both inner sidewalls. The vibrating element is fixedly connected to the slide rod 25 in the groove 24. The screen 19 is slidably connected to the slide rod 25. The cam 27 is rotatably connected to the groove 24 through the connecting shaft 26. The cam 27 contacts the top of the screen 19. The first motor 28 is fixedly connected to the screening frame 18. One end of the connecting shaft 26 is fixedly connected to the output shaft of the first motor 28.

[0052] In one embodiment of the present invention, a first motor 28 drives a cam 27 to rotate, and the cam 27 drives the screen 19 to move vertically, thereby controlling the vertical vibration of the screen 19 and ensuring screening efficiency.

[0053] As an optional implementation, the stirring component includes a stirring shaft 29, which is rotatably connected to the stirring tank 4. Several stirring rods 30 are fixedly connected to the stirring shaft 29. A second motor 31 is fixedly connected to the stirring tank 4. One end of the stirring shaft 29 is fixedly connected to the output shaft of the second motor 31.

[0054] In one embodiment of the present invention, the stirring rod 30 is driven to rotate by the second motor 31 to achieve stirring of the material. Specifically, the inner wall of the stirring tank 4 can be provided with a guide plate to eliminate the stirring dead zone.

[0055] As an optional implementation, the detection device includes a detection module 32 fixedly connected to the mixing tank 4. The detection module 32 is used to detect the consistency, pH and temperature of the material in the mixing tank 4.

[0056] In one embodiment of the present invention, the detection module 32 integrates the slump cone method, pH electrode and temperature sensor, and the data is transmitted in real time to the Internet of Things platform through PLC, supporting remote control.

[0057] As an optional implementation, a spring 33 is sleeved on the slide bar 25. The two ends of the spring 33 are fixedly connected to the bottom end of the slide groove 24 and the bottom end of the screen 19, respectively. A cleaning frame 34 is fixedly connected to the bottom end of the screening frame 18. Several cleaning heads 35 are fixedly connected to the cleaning frame 34. The cleaning heads 35 are adapted to the mesh of the screen 19.

[0058] In one embodiment of the present invention, the vibration of the screen 19 is achieved by the spring 33. When the screen 19 moves to the bottom, the cleaning head 35 extends into the mesh of the screen 19 to clean the screen 19 and avoid screen blockage.

[0059] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0060] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for preparing coal-based solid waste backing paste, characterized in that, include: The crushing and screening tank (1) has a feeding port (2) at the top. Two crushing rollers (3) are installed inside the crushing and screening tank (1), and the two crushing rollers (3) are located directly below the feeding port (2). The screening assembly includes a magnetic separator and a screening element. Both the magnetic separator and the screening element are installed inside the crushing and screening tank (1). The magnetic separator is located directly below the crushing roller (3) and is used to magnetically screen the crushed material. The screening element is located directly below the magnetic separator and is used to vibrate and screen the magnetically separated material. The mixing assembly includes a mixing tank (4) and a mixing element. The mixing tank (4) is connected to the crushing and screening tank (1). The mixing element is disposed in the mixing tank (4) for mixing materials. The testing device is installed on the mixing tank (4) and is used to test the consistency, pH value and temperature of the material.

2. The apparatus for preparing coal-based solid waste backfill paste according to claim 1, characterized in that: The magnetic separator includes a bracket (5) which is fixedly connected inside the crushing and screening tank (1). A receiving trough (6) is fixedly connected to the bracket (5). Permanent magnet rollers (7) are rotatably connected to both ends of the bracket (5). The permanent magnet rollers (7) slide in contact with the outer wall of the receiving trough (6). The crushed material is guided to the permanent magnet rollers (7) for magnetic separation and screening. A circulating screening component is provided inside the receiving trough (6). The circulating screening component is used to guide the material in the receiving trough (6) to the permanent magnet rollers (7).

3. The apparatus for preparing coal-based solid waste backfill paste according to claim 2, characterized in that: The circulating screening component includes two rows of circulating components. The circulating components include several conveying pipes (8). Several of the conveying pipes (8) are fixedly connected in the receiving trough (6) along the axial direction. The bottom and top of the conveying pipes (8) are respectively provided with a feed inlet (9) and a discharge outlet (10) on the side close to the inner wall of the receiving trough (6). A spiral conveying roller (11) is installed in the conveying pipe (8).

4. The apparatus for preparing coal-based solid waste backfill paste according to claim 3, characterized in that: A guide cover (12) is fixedly connected to the bracket (5). The guide cover (12) is located at the top of the conveying pipe (8) and the guide cover (12) is an inverted V-shaped structure. A guide plate (13) is fixedly connected to the discharge port (10). The guide cover (12) and the guide plate (13) respectively guide the crushed material to the permanent magnet drum (7).

5. The apparatus for preparing coal-based solid waste backing paste according to claim 2, characterized in that: The receiving trough (6) has a collection trough (14) fixedly connected to both outer walls. The collection trough (14) is located below the permanent magnet roller (7). The receiving trough (6) has a discharge port (15) on both side walls. A sealing plate (16) is hinged to the discharge port (15). The sealing plate (16) is hinged to the collection trough (14) by an electric telescopic rod (17). When the sealing plate (16) is opened, a discharge channel is formed between the sealing plate (16), the discharge port (15) and the collection trough (14).

6. The apparatus for preparing coal-based solid waste backing paste according to claim 1, characterized in that: The screening component includes a screening frame (18), a screen (19) is provided inside the screening frame (18), a vibrating element is provided on the screening frame (18), the screen (19) is slidably connected to the screening frame (18) through the vibrating element, a rotating shaft (20) is fixedly connected to each of the two opposite outer walls of the screening frame (18), the rotating shaft (20) is rotatably connected to the crushing and screening tank (1), one of the rotating shafts (20) extends out of the crushing and screening tank (1) and is fixedly connected to a gear (21), a toothed plate (23) is connected to the outer wall of the crushing and screening tank (1) through a cylinder (22), and the gear (21) meshes with the toothed plate (23).

7. The apparatus for preparing coal-based solid waste backfill paste according to claim 6, characterized in that: The screening frame (18) has grooves (24) on both inner sidewalls. The vibrating element is fixedly connected to the slide rod (25) in the groove (24). The screen (19) is slidably connected to the slide rod (25). A cam (27) is rotatably connected in the groove (24) through a connecting shaft (26). The cam (27) contacts the top of the screen (19). A first motor (28) is fixedly connected in the screening frame (18). One end of the connecting shaft (26) is fixedly connected to the output shaft of the first motor (28).

8. The apparatus for preparing coal-based solid waste backfill paste according to claim 1, characterized in that: The stirring component includes a stirring shaft (29) rotatably connected to the stirring tank (4), a plurality of stirring rods (30) are fixedly connected to the stirring shaft (29), a second motor (31) is fixedly connected to the stirring tank (4), and one end of the stirring shaft (29) is fixedly connected to the output shaft of the second motor (31).

9. The apparatus for preparing coal-based solid waste backfill paste according to claim 1, characterized in that: The detection device includes a detection module (32) fixedly connected to the mixing tank (4), and the detection module (32) is used to detect the consistency, pH and temperature of the material in the mixing tank (4).

10. The apparatus for preparing coal-based solid waste backfill paste according to claim 7, characterized in that: A spring (33) is fitted on the slide rod (25). The two ends of the spring (33) are fixedly connected to the bottom end of the slide groove (24) and the bottom end of the screen (19), respectively. A cleaning frame (34) is fixedly connected to the bottom inside the screening frame (18). A plurality of cleaning heads (35) are fixedly connected to the cleaning frame (34). The cleaning heads (35) are adapted to the mesh of the screen (19).

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