Mixing tank for mine tailing paste filling slurry

Abstract

A mine tailing paste filling slurry stirring barrel comprises a barrel body and a stirring device installed in the barrel body, an ash inlet pipe, a slurry inlet pipe and a water inlet pipe are arranged at the top of the barrel body, an overflow pipe is arranged on the side wall of the barrel body, a discharging pipe is arranged at the bottom of the barrel body, and an annular water spraying pipe is arranged in the barrel body. An inlet of the annular water spraying pipe communicates with an outlet of a water inlet pipe, the water inlet pipe is connected with high-pressure water, at least one water spraying opening set is formed in the side, facing the side wall of the barrel body, of the annular water spraying pipe, and the multiple water spraying opening sets are arranged up and down in the center axis direction of the annular water spraying pipe. The water spraying nozzle group comprises a plurality of water spraying nozzles or water spraying heads which are uniformly distributed by taking the central axis of the annular water spraying pipe as the center, and the water spraying nozzles or the water spraying heads are obliquely and upwards distributed, so that an included angle a is formed between a water column sprayed by the water spraying nozzles or the water spraying heads and the horizontal plane. According to the utility model, the accident that a curing agent is hardened to block the feed opening of the stirring barrel is reduced, the stability of the whole filling system is guaranteed, and the labor intensity of manual cleaning is also reduced.

Description

Technical Field

[0001] This utility model relates to a mixing tank for mixing tailings paste filling slurry in mining. Background Technology

[0002] During the mineral resource development and utilization phase, the generation of large amounts of solid waste is unavoidable. Mines typically choose to refill the remaining solid waste into underground open spaces. This measure reduces the likelihood of underground open space collapses and also minimizes environmental pollution caused by the waste.

[0003] Paste backfilling technology involves mixing one or more solid waste materials (commonly tailings), cement (or curing agent), and water in specific proportions under certain conditions. Using a mixing tank, this mixture is formed into a paste-like slurry with a certain degree of stability, fluidity, and plasticity. Then, under the influence of external forces or gravity, it is transported through pipelines in a plunger flow manner to the underground goaf to complete the backfilling operation. This technology opens up an ideal path for solid waste treatment, not only realizing the resource utilization of solid waste, but also providing support to the goaf, ensuring the safety of the mining process, reducing ore loss and dilution, and improving the utilization efficiency of mineral resources.

[0004] However, traditional vertical mixing tanks have some problems in the mixing and preparation of tailings paste filling slurry. Dust generated by the hardener inside the tank can easily mix with water droplets (water mist) splashed inside the tank, and easily adhere to the tank wall after becoming damp. Over time, this will form a hardened slab, which poses a risk of large hardened objects falling into the tank and clogging the mixing tank's discharge port. There is also a risk of the filling system being shut down due to the inability to discharge hardener during the production process caused by the blockage of the hardener discharge port. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a mining tailings paste filling slurry mixing tank that prevents caking and clogging.

[0006] To achieve the above objectives, this utility model first proposes a tailings paste filling slurry mixing tank for mining, including a tank body and a mixing device installed inside the tank body. The top of the tank body is provided with an ash inlet pipe, a slurry inlet pipe and a water inlet pipe. An overflow pipe is provided on the side wall of the tank body, and a discharge pipe is provided at the bottom of the tank body. An annular water spray pipe is provided inside the tank body near the top of the tank body. The inlet of the annular water spray pipe is connected to the outlet of the water inlet pipe. The water inlet pipe is connected to high-pressure water. At least one set of spray nozzles is arranged on the side of the annular water spray pipe facing the side wall of the tank body. Multiple sets of spray nozzles are arranged up and down along the central axis of the annular water spray pipe. The spray nozzles include multiple spray nozzles or spray heads evenly arranged around the central axis of the annular water spray pipe. The spray nozzles or spray heads are all inclined upwards, so that the water column sprayed from the spray nozzles or spray heads has an angle α with the horizontal plane. An aeration device is also installed at the bottom of the tank body (7).

[0007] In this embodiment, the included angle α is 30° to 60°.

[0008] In this embodiment, the top of the barrel is provided with a barrel cover, and the ash inlet pipe, slurry inlet pipe, water inlet pipe and annular water spray pipe are all installed on the barrel cover.

[0009] In this embodiment, the inlet of the ash inlet pipe is located outside the barrel, and the outlet is located inside the barrel, with its horizontal height lower than the bottom surface of the annular water spray pipe.

[0010] In this embodiment, the horizontal height of the overflow pipe inlet is lower than the horizontal height of the ash inlet pipe outlet.

[0011] In this embodiment, the stirring device includes a motor, a stirring shaft, and stirring blades. The motor is installed on the top of the bucket lid. One end of the stirring shaft is coaxially connected to the output end of the motor, and the other end is located inside the bucket. Multiple stirring blades are coaxially fixed on the stirring shaft.

[0012] In this embodiment, a valve is provided on the feeding pipe.

[0013] In this embodiment, the aeration device includes multiple annular aeration pipes of different diameters arranged coaxially, and the annular aeration pipes are connected to external high-pressure air through pipelines.

[0014] With the above structure, this utility model has the following advantages:

[0015] 1. The device has an annular water spray pipe near the top of the barrel, with the spray nozzle or head of the annular water spray pipe tilted upwards at an angle of 30° to 60°. This allows the sprayed water to cover the side wall of the barrel, flushing the inner wall of the barrel when providing mixing water, effectively preventing clumping. On the other hand, it is designed to work with the outlet of the ash inlet pipe being lower than the bottom surface of the annular water spray pipe, preventing the water sprayed from the annular water spray pipe from contacting the outlet of the ash inlet pipe, thus preventing the ash inlet pipe from getting damp and hardened. At the same time, an aeration device consisting of multiple annular aeration pipes of different diameters arranged coaxially is installed at the bottom of the barrel. This, in conjunction with the mixing device, can enhance the mixing effect, homogenize the paste slurry in the barrel, and prevent the material from hardening in the barrel.

[0016] 2. The top of the tank is equipped with a lid, on which the ash inlet pipe, slurry inlet pipe, water inlet pipe, and annular water spray pipe are all installed. Removing the lid allows for convenient maintenance or cleaning. The motor of the mixing device is installed on the top of the lid, and the mixing shaft is coaxially connected to the motor output end. Multiple mixing blades are coaxially fixed on the mixing shaft, resulting in a reasonable structure and stable operation.

[0017] 3. The overflow pipe inlet of this device is lower than the ash inlet pipe outlet to ensure normal system operation. The discharge pipe adopts a clamp valve for easy control of material discharge.

[0018] In summary, the mixing water of this invention enters the tank through a ring-shaped spray pipe. While providing clean water for mixing, it can also flush the inner wall of the tank to prevent clumping. Furthermore, since the ash inlet pipe extends into the tank, it avoids the water sprayed from the ring-shaped spray pipe coming into contact with the outlet of the ash inlet pipe, thus preventing the ash inlet pipe from becoming damp or clumping. This reduces the risk of large objects forming from the hardener falling into the mixing tank and clogging the discharge port, ensuring the stability of the entire filling system and reducing the labor intensity of manual cleaning. Attached Figure Description

[0019] Figure 1 This is a front view of the internal structure of this utility model.

[0020] Figure 2 This is a top view of the internal structure of this utility model.

[0021] In the attached diagram: 1. Ash inlet pipe; 2. Motor; 3. Slurry inlet pipe; 4. Water inlet pipe; 5. Annular water spray pipe; 6. Overflow pipe; 7. Tank body; 8. Agitator blades; 9. Valve; 10. Feed pipe; 11. Annular aeration pipe. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] like Figure 1 , 2 As shown, a tailings paste filling slurry mixing tank for mining includes a tank body 7 and a mixing device installed inside the tank body 7. The top of the tank body 7 is provided with an ash inlet pipe 1, a slurry inlet pipe 3, and a water inlet pipe 4. An overflow pipe 6 is provided on the side wall of the tank body 7, and a discharge pipe 10 is provided at the bottom of the tank body 7. An annular water spray pipe 5 is provided inside the tank body 7, near the top. The inlet of the annular water spray pipe 5 is connected to the outlet of the water inlet pipe 4, which is connected to high-pressure water. The annular water spray pipe 5 is coaxially arranged with the tank body 7, and its outer diameter is slightly smaller than the inner diameter of the tank body 7. At least one set of spray nozzles is arranged on the side of the annular water spray pipe 5 facing the side wall of the tank body 7, and multiple sets of spray nozzles are arranged vertically along the central axis of the annular water spray pipe 5. The spray nozzle assembly includes multiple spray nozzles evenly distributed around the central axis of the annular spray pipe 5. The spray nozzles facing the side wall of the barrel 7 are all inclined upwards, so that the water jet sprayed from the side wall spray nozzles has an angle α with the horizontal plane. In this embodiment, α is preferably 30° to 60°, thereby ensuring that the water sprayed from the spray nozzles can completely cover the side wall of the barrel 7. Furthermore, the top of the barrel 7 is provided with a barrel cover, and the ash inlet pipe 1, slurry inlet pipe 3, water inlet pipe 4 and annular spray pipe 5 are all installed on the barrel cover. The barrel cover can be removed for easy maintenance or cleaning. In this embodiment, a spray head can also be installed on the annular spray pipe 5 to replace the spray nozzles on the annular spray pipe 5. The spray angle of the spray head is consistent with the spray angle of the spray nozzles.

[0025] Furthermore, the inlet of the ash inlet pipe 1 is located outside the barrel body 7, and the outlet is located inside the barrel body 7, with its horizontal height lower than the horizontal height of the bottom surface of the annular water spray pipe 5; the horizontal height of the inlet of the overflow pipe 6 is lower than the horizontal height of the outlet of the ash inlet pipe 1; a valve 9 is provided on the discharge pipe 10, and the valve 9 is a clamp valve.

[0026] like Figure 1 , 2As shown, an aeration device is also installed at the bottom of the barrel 7. The aeration device includes multiple annular aeration pipes 11 of different diameters arranged coaxially. The annular aeration pipes 11 are connected to the external high-pressure air through pipelines.

[0027] The stirring device includes a motor 2, a stirring shaft, and stirring blades 8. The motor 2 is installed on the top of the bucket lid. One end of the stirring shaft is coaxially connected to the output end of the motor 2, and the other end is set inside the bucket body 7. Multiple stirring blades 8 are coaxially fixed on the stirring shaft.

[0028] In use, connect the high-pressure water to the water inlet pipe 4. After the water in the barrel 7 reaches a certain height, feed the material through the ash inlet pipe 1 and the slurry inlet pipe 3, and turn on the stirring device and the aeration device. In this way, the water for stirring enters the barrel 7 through the annular water spray pipe 5. While providing clean water for stirring, it can also flush the inner wall of the barrel 7 to prevent the inner wall of the barrel 7 from caking. Moreover, since the ash inlet pipe 1 extends into the barrel 7, it can prevent the water sprayed by the annular water spray pipe 5 from contacting the outlet of the ash inlet pipe 1, thus avoiding the ash inlet pipe 1 from getting damp and caking.

[0029] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A mine tailings paste filling slurry mixing drum comprising a drum body (7) and a mixing device installed in the drum body (7), characterized in that, The top of the barrel body (7) is provided with an ash inlet pipe (1), a pulp inlet pipe (3) and a water inlet pipe (4), the side wall of the barrel body (7) is provided with an overflow pipe (6), the bottom of the barrel body (7) is provided with a discharge pipe (10), the inner side of the barrel body (7) is provided with an annular water spraying pipe (5) near the top of the barrel body (7), the inlet of the annular water spraying pipe (5) is communicated with the outlet of the water inlet pipe (4), the water inlet pipe (4) is connected with high-pressure water, at least one group of water spraying openings is arranged on the side of the annular water spraying pipe (5) facing the side wall of the barrel body (7), a plurality of groups of water spraying openings are arranged in the direction of the central axis of the annular water spraying pipe (5) from top to bottom, the group of water spraying openings includes a plurality of water spraying openings or water spraying heads arranged uniformly around the central axis of the annular water spraying pipe (5), the water spraying openings or water spraying heads are all arranged obliquely upward, so that the water column sprayed by the water spraying openings or water spraying heads has an included angle a with the horizontal plane, and the bottom of the barrel body (7) is further provided with an aeration device.

2. Mine tailings paste filling slurry mixing drum according to claim 1, characterized in that: The included angle a is 30°-60°.

3. Mine tailings paste filling slurry mixing drum according to claim 1, characterized in that: The top of the barrel body (7) is provided with a barrel cover, and the ash inlet pipe (1), the pulp inlet pipe (3), the water inlet pipe (4) and the annular water spraying pipe (5) are all installed on the barrel cover.

4. Mine tailings paste filling slurry mixing drum according to claim 1, characterized in that: The inlet of the ash inlet pipe (1) is arranged outside the barrel body (7), and the outlet is arranged inside the barrel body (7) and has a horizontal height lower than that of the bottom surface of the annular water spraying pipe (5).

5. Mine tailings paste filling slurry mixing drum according to claim 4, characterized in that: The horizontal height of the inlet of the overflow pipe (6) is lower than that of the outlet of the ash inlet pipe (1).

6. Mine tailings paste filling slurry mixing drum according to claim 4, characterized in that: The stirring device includes a motor (2), a stirring shaft and stirring blades (8), the motor (2) is installed on the top of the barrel cover, one end of the stirring shaft is coaxially connected with the output end of the motor (2), the other end is arranged in the barrel body (7), and a plurality of stirring blades (8) are coaxially fixed on the stirring shaft.

7. The mine tailings paste filling slurry agitator bucket of claim 1, wherein: The discharge pipe (10) is provided with a valve (9).

8. Mine tailings paste filling slurry mixing drum according to any one of claims 1 to 7, characterized in that: The aeration device includes a plurality of annular aeration pipes (11) with different diameters and coaxially arranged, and the annular aeration pipes (11) are connected with external high-pressure air through pipelines.

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