Underground mobile gangue slurry preparation unit and preparation method

Abstract

The invention discloses a mobile gangue slurry preparation unit in a mine, comprising a material preparation and conveying unit, which is connected with a feeding unit through a quantitative feeder. The invention also discloses a method for preparing the gangue slurry using the unit, comprising the following steps: step 1, using a material transfer belt to sequentially convey and fill a plurality of bin bodies with gangue powder; step 2, the bin bodies convey the gangue powder to the material transfer roller through a discharge port; step 3, the material transfer roller conveys the gangue powder to the quantitative feeder, which conveys the gangue powder into the communicating overflow mixer; step 4, opening the quantitative water supply system to supply water to the communicating overflow mixer for mixing, and the mixed gangue slurry is conveyed to the grouting and filling pump through the discharge port; step 5, the grouting and filling pump pumps the gangue slurry to the underground goaf. The gangue slurry preparation unit solves the problem of interruption in the gangue slurry conveying in the existing preparation technology.

Description

Technical Field

[0001] This invention belongs to the field of underground gangue slurry preparation technology, specifically relating to an underground mobile gangue slurry preparation unit, and also to a method for preparing gangue slurry using the unit. Background Technology

[0002] Coal gangue slurry filling technology for goaf areas involves processing coal gangue into finished materials with a specific particle size distribution through crushing or grinding, then mixing it with water in a certain proportion to create a slurry of a specific concentration. Finally, the coal gangue slurry is pumped into the underground goaf area via pipeline using a grouting pump, thus achieving underground disposal of coal gangue. However, when applied underground, this technology often encounters problems such as mismatch between material supply and mixing, uneven mixing of the gangue slurry, unstable slurry concentration, and "water flowing out while material remains" within the mixer. These issues can easily lead to interruptions in continuous operation and, in severe cases, damage to the grouting pump or blockage of the filling pipeline. Summary of the Invention

[0003] The purpose of this invention is to provide a mobile gangue slurry preparation unit for underground mining, which solves the problem of interruption in gangue slurry transportation in existing preparation technologies.

[0004] Another object of the present invention is to provide a method for preparing gangue slurry.

[0005] The technical solution adopted in this invention is an underground mobile gangue slurry preparation unit, including a material preparation and conveying unit, which is connected to a feeding unit via a quantitative feeder.

[0006] The invention is further characterized by:

[0007] The material preparation and conveying unit includes a connected overflow mixer, a quantitative water supply system at the water inlet of the connected overflow mixer, a grouting and filling pump at the discharge outlet of the connected overflow mixer, and a quantitative feeder at the material inlet of the connected overflow mixer.

[0008] The feeding unit includes a belt-loaded buffer hopper, with a transfer roller at the lower end of the belt-loaded buffer hopper, which works in conjunction with a quantitative feeder; it also includes a transfer belt, which is located at the feed inlet of the belt-loaded buffer hopper.

[0009] The belt-loaded slow-moving hopper includes several hopper bodies arranged side by side. The side walls where the hopper bodies meet are provided with clamping slots. A spring is fixedly connected in the clamping slot, and a movable clamping plate is fixedly connected to the other end of the spring. The movable clamping plate is located in the clamping slot. The lower section of the hopper body is provided with a discharge port, which cooperates with the transfer roller.

[0010] Another technical solution adopted in this invention is a method for preparing gangue slurry, comprising the following steps:

[0011] Step 1: Use a conveyor belt to sequentially transport and fill several bins with gangue powder;

[0012] Step 2: The silo body conveys the gangue powder to the transfer roller through the discharge port;

[0013] Step 3: The transfer roller conveys the gangue powder to the quantitative feeder, which then conveys the gangue powder into the overflow mixer.

[0014] Step 4: Turn on the quantitative water supply system to supply water to the overflow mixer for mixing. The mixed gangue slurry is then transported to the grouting and filling pump through the discharge port.

[0015] Step 5: The grouting and filling pump delivers the gangue slurry to the underground goaf.

[0016] Another feature of the technical solution of this invention is that:

[0017] The specific process of filling several compartments in step 1 is as follows:

[0018] Step 1.1: Mount the transfer belt head between the two bins near the quantitative feeder, and fix the transfer belt by compressing the moving plate and stretching the spring.

[0019] Step 1.2: The gangue powder is unloaded into the first bin closest to the quantitative feeder via the transfer belt. Then the transfer belt automatically retreats by the width of one bin. The spring in the slot of the clamping plate on the side wall of the first bin resets, causing the moving clamping plate to rise and block the first bin. This process is repeated until all bins are filled.

[0020] The beneficial effects of this invention are:

[0021] This invention provides an underground mobile gangue slurry preparation unit and method, enabling rapid and continuous preparation of gangue slurry. The loading-type slow-release silo allows for both long-distance transport and short-distance storage of gangue powder, and can be perfectly connected with a continuous overflow mixer to achieve a quantitative and continuous supply of gangue powder. The continuous overflow mixer breaks through the traditional single-stage mixing of mixers, realizing three continuous mixing of gangue powder and water, ensuring the stability of the gangue slurry and its continuous output. This invention breaks the traditional fixed and large-scale layout of ground-based slurry preparation stations, realizing a mobile, miniaturized, lightweight, and linear layout underground, enabling efficient preparation of gangue slurry without affecting normal mine production, thus achieving underground preparation of gangue slurry. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the underground mobile gangue slurry preparation unit of the present invention;

[0023] Figure 2 yes Figure 1 Top view;

[0024] Figure 3 This is a side view of the movable pallet between the chambers of the underground mobile gangue slurry preparation unit of the present invention.

[0025] In the diagram, 1. Conveyor belt, 2. Belt-loaded slow-moving silo, 3. Quantitative feeder, 4. Continuous overflow mixer, 5. Quantitative water supply system, 6. Grouting and filling pump, 7. Pallet slot, 8. Silo body, 9. Moving pallet, 10. Spring, 11. Discharge port, 12. Conveyor roller, 13. Vertical motor, 14. Mixing disc, 15. Vertical mixer blade, 16. Divider plate, 17. Horizontal mixer blade, 18. Slurry outlet, 19. Slurry cleaning port, 20. Overflow plate, 21. Vertical mixer housing, 22. Horizontal mixer housing, 23. Horizontal motor. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0027] This invention provides a mobile underground gangue slurry preparation unit, such as... Figure 1 As shown, it includes a material preparation and conveying unit, which is connected to a feeding unit via a quantitative feeder 3. For example... Figure 2 As shown, the material conveying unit includes a connected overflow mixer 4, which includes a horizontal mixer housing 22. A vertical mixer housing 21 is located at one end of the horizontal mixer housing 22. A horizontal motor 23 is located outside the horizontal mixer housing 22. Several horizontal mixer blades 17 are mounted on the shaft of the horizontal motor 23 inside the horizontal mixer housing 22. A vertical motor 13 is located outside the vertical mixer housing 21. Several vertical mixer blades 15 are mounted on the shaft of the vertical motor 13 inside the vertical mixer housing 21. A mixing disc 14 is located between the vertical motor 13 and the vertical mixer blades 15, and the mixing disc 14 is fitted onto the shaft of the vertical motor 13. A partition plate 16 is located between the horizontal mixer blades 17 and the vertical mixer blades 15. An overflow plate 20 is provided at one end of the mixer housing 22 near the horizontal motor 23. A slurry outlet 18 is provided at the bottom of the horizontal mixer housing 22, corresponding to the partition plate 16. A slurry cleaning outlet 19 is provided at the bottom of the horizontal mixer housing 22. A quantitative water supply system 5 is provided at the inlet of the overflow mixer 4, providing a quantitative amount of water to the overflow mixer 4. A grouting pump 6 is provided at the outlet of the overflow mixer 4, and the inlet of the overflow mixer 4 cooperates with the quantitative feeder 3. The feeding unit includes a belt-loaded buffer hopper 2, with a transfer roller 12 at the lower end of the belt-loaded buffer hopper 2, which cooperates with the quantitative feeder 3. It also includes a transfer belt 1, which is located at the inlet of the belt-loaded buffer hopper 2. Figure 3As shown, the belt-loaded slow-moving hopper 2 includes several hopper bodies 8 arranged side by side. The side walls where the hopper bodies 8 meet are respectively provided with a clamping plate groove 7. A spring 10 is fixedly connected in the clamping plate groove 7. A movable clamping plate 9 is fixedly connected to the other end of the spring 10. The movable clamping plate 9 is located in the clamping plate groove 7. The lower section of the hopper body 8 is provided with a discharge port 11, which cooperates with the rotating roller 12.

[0028] The working principle of the underground mobile gangue slurry preparation unit provided by this invention is as follows: A conveyor belt 1 fills gangue powder into several bins 8. The discharge port 11 unloads the gangue powder from the bins 8 onto a transfer roller 12. Through the transfer roller 12, the gangue powder enters a connected overflow mixer 4 via a metering feeder 3. The gangue powder is evenly distributed on the mixing pan 14 of the connected overflow mixer 4. Simultaneously, a metering water supply system 5 meterly supplies water to the connected overflow mixer 4. The water falls into the mixing pan 14 and initially mixes with the gangue powder, forming a gangue slurry. The slurry flows by gravity into the vertical mixer housing 21. The vertical motor 13 drives the vertical mixer blades 15 to a second time to mix the slurry. The evenly mixed slurry enters the horizontal mixer housing 22 through the channel below the partition plate 16. The horizontal motor 23 drives the horizontal mixer blades 17 to a third time to mix the slurry. When the slurry in the horizontal mixer housing 22 exceeds the height of the overflow plate 20, the slurry overflows through the outlet 18 into the grouting pump 6. Finally, the grouting pump 6 pumps the slurry to the underground goaf. After the gangue slurry is filled, only the quantitative water supply system 5 is connected and the slurry cleaning port 19 is opened to flush the overflow mixer 4. The slurry flows from the slurry cleaning port 19 into the grouting pump 6, which pumps the slurry to the underground goaf area to clean the equipment and pipelines.

[0029] This invention provides a method for preparing gangue slurry, comprising the following steps:

[0030] Step 1: Use conveyor belt 1 to sequentially transport and fill several bins 8 with gangue powder;

[0031] Step 1.1: Mount the head of the transfer belt 1 between the two bins 8 near the quantitative feeder 3, and fix the transfer belt 1 by compressing the moving plate 9 and stretching the spring 10 through the transfer belt 1;

[0032] Step 1.2: The gangue powder is unloaded by the transfer belt 1 into the first bin 8 closest to the quantitative feeder 3. Then the transfer belt 1 automatically moves back one bin 8 width, the spring 10 in the card slot 7 on the side wall of the first bin 8 resets, and drives the moving card 9 to rise, blocking the first bin 8. This process continues until all bins 8 are filled.

[0033] Step 2: The silo body 8 conveys the gangue powder to the transfer roller 12 through the discharge port 11;

[0034] Step 3: The transfer roller 12 conveys the gangue powder to the quantitative feeder 3, and the quantitative feeder 3 conveys the gangue powder to the connected overflow mixer 4;

[0035] Step 4: Turn on the quantitative water supply system 5 to supply water to the overflow mixer 4 for mixing. The mixed gangue slurry is then transported to the grouting and filling pump 6 through the discharge port.

[0036] Step 5: The grouting and filling pump 6 pumps the gangue slurry to the underground goaf.

[0037] Example 1

[0038] The underground mobile gangue slurry preparation unit proposed in this embodiment, such as... Figure 1 As shown, it includes a material preparation and conveying unit, which is connected to a feeding unit via a quantitative feeder 3.

[0039] Example 2

[0040] The underground mobile gangue slurry preparation unit proposed in this embodiment, such as... Figure 1 As shown, it includes a material preparation and conveying unit, which is connected to a feeding unit via a quantitative feeder 3. For example... Figure 2 As shown, the material feeding and conveying unit includes a connected overflow mixer 4, a quantitative water supply system 5 at the inlet of the connected overflow mixer 4, a grouting and filling pump 6 at the outlet of the connected overflow mixer 4, and a quantitative feeder 3 at the inlet of the connected overflow mixer 4; the feeding unit includes a belt-loaded slow silo 2, a transfer roller 12 at the lower end of the belt-loaded slow silo 2, and the transfer roller 12 cooperates with the quantitative feeder 3; it also includes a transfer belt 1, which is located at the inlet of the belt-loaded slow silo 2.

[0041] Example 3

[0042] The underground mobile gangue slurry preparation unit proposed in this embodiment, such as... Figure 1 As shown, it includes a material preparation and conveying unit, which is connected to a feeding unit via a quantitative feeder 3. For example... Figure 2 As shown, the material preparation and conveying unit includes a connected overflow mixer 4, a quantitative water supply system 5 at the inlet of the connected overflow mixer 4, a grouting and filling pump 6 at the outlet of the connected overflow mixer 4, and a quantitative feeder 3 cooperating with the inlet of the connected overflow mixer 4; the feeding unit includes a belt-loaded buffer hopper 2, a transfer roller 12 at the lower end of the belt-loaded buffer hopper 2, the transfer roller 12 cooperating with the quantitative feeder 3; it also includes a transfer belt 1, which is located at the inlet of the belt-loaded buffer hopper 2. Figure 3As shown, the belt-loaded slow-moving hopper 2 includes several hopper bodies 8 arranged side by side. The side walls where the hopper bodies 8 meet are respectively provided with a clamping plate groove 7. A spring 10 is fixedly connected in the clamping plate groove 7. A movable clamping plate 9 is fixedly connected to the other end of the spring 10. The movable clamping plate 9 is located in the clamping plate groove 7. The lower section of the hopper body 8 is provided with a discharge port 11, which cooperates with the rotating roller 12.

[0043] Example 4

[0044] The gangue slurry preparation method proposed in this embodiment uses an underground mobile gangue slurry preparation unit and includes the following steps:

[0045] Step 1: Use conveyor belt 1 to sequentially transport and fill several bins 8 with gangue powder;

[0046] Step 1.1: Mount the head of the transfer belt 1 between the two bins 8 near the quantitative feeder 3, and fix the transfer belt 1 by compressing the moving plate 9 and stretching the spring 10 through the transfer belt 1;

[0047] Step 1.2: The gangue powder is unloaded by the transfer belt 1 into the first bin 8 closest to the quantitative feeder 3. Then the transfer belt 1 automatically moves back one bin 8 width, the spring 10 in the card slot 7 on the side wall of the first bin 8 resets, and drives the moving card 9 to rise, blocking the first bin 8. This process continues until all bins 8 are filled.

[0048] Step 2: The silo body 8 conveys the gangue powder to the transfer roller 12 through the discharge port 11;

[0049] Step 3: The transfer roller 12 conveys the gangue powder to the quantitative feeder 3, and the quantitative feeder 3 conveys the gangue powder to the connected overflow mixer 4;

[0050] Step 4: Turn on the quantitative water supply system 5 to supply water to the overflow mixer 4 for mixing. The mixed gangue slurry is then transported to the grouting and filling pump 6 through the discharge port.

[0051] Step 5: The grouting and filling pump 6 pumps the gangue slurry to the underground goaf.

Claims

1. A mobile underground gangue slurry preparation unit, characterized in that, It includes a material preparation and conveying unit, which is connected to a feeding unit via a quantitative feeder (3); The material preparation and conveying unit includes a connected overflow mixer (4), a quantitative water supply system (5) is provided at the water inlet of the connected overflow mixer (4), a grouting and filling pump (6) is provided at the discharge outlet of the connected overflow mixer (4), and the feed inlet of the connected overflow mixer (4) is coordinated with a quantitative feeder (3). The feeding unit includes a belt-loaded slow-moving hopper (2), and a transfer roller (12) is provided at the lower end of the belt-loaded slow-moving hopper (2). The transfer roller (12) is in cooperation with the quantitative feeder (3). It also includes a material transfer belt (1), which is located at the inlet of the belt-loaded buffer hopper (2); The belt-loaded slow-moving hopper (2) includes several hopper bodies (8), which are arranged side by side. The side walls of the several hopper bodies (8) that are connected are respectively provided with a card slot (7). A spring (10) is fixedly connected in the card slot (7). A movable card (9) is fixedly connected to the other end of the spring (10). The movable card (9) is located in the card slot (7). The lower section of the hopper body (8) is provided with a discharge port (11), which cooperates with the material transfer roller (12).

2. A method for preparing gangue slurry, characterized in that, The method of using the downhole mobile gangue slurry preparation unit according to claim 1 includes the following steps: Step 1: Use the conveyor belt (1) to transport the gangue powder in sequence to fill several bins (8); Step 2: The silo (8) conveys the gangue powder to the transfer roller (12) through the discharge port (11); Step 3: The transfer roller (12) conveys the gangue powder to the quantitative feeder (3), and the quantitative feeder (3) conveys the gangue powder to the connected overflow mixer (4); Step 4: Open the quantitative water supply system (5) to supply water to the overflow mixer (4) for mixing. The mixed gangue slurry is then transported to the grouting pump (6) through the discharge port. Step 5: Grouting and filling pump (6) pumps the gangue slurry to the underground goaf.

3. The method for preparing gangue slurry according to claim 2, characterized in that, The specific process of filling several compartments (8) in step 1 is as follows: Step 1.1: Mount the head of the transfer belt (1) between the two bins (8) close to the quantitative feeder (3), and fix the transfer belt (1) by compressing the moving plate (9) and stretching the spring (10). Step 1.2: The gangue powder is unloaded by the transfer belt (1) into the first bin (8) closest to the quantitative feeder (3). Then the transfer belt (1) automatically moves back one bin (8) width. The spring (10) in the card slot (7) on the side wall of the first bin (8) is reset, which drives the moving card (9) to rise and block the first bin (8). This process is repeated until all bins (8) are filled.

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