Coal mine goaf paste filling material preparation and fluidity detection integrated device

Abstract

The utility model discloses a coal mine goaf paste filling material preparation and liquidity detection integrated device belongs to paste filling material slurry detection technical field, including first agitator, and the feed port of first agitator is connected with the feed port of second agitator, still include first jar, second jar, water storage tank and third jar, and the feed port of first jar, second jar, water storage tank and third jar all are connected with the feed port of first agitator, still include fourth jar, fifth jar and sixth jar, and the feed port of fourth jar, fifth jar and sixth jar all are connected with the feed port of second agitator, still include material slurry jar, and the bottom of material slurry jar is connected L type pipe, and the feed port of second agitator is connected the top of material slurry jar, L type pipe includes the vertical pipe of connecting in material slurry jar bottom, and the other end of vertical pipe is connected horizontal pipe, and vertical pipe is provided with valve on. Can realize filling material slurry preparation and liquidity detection two links connection, improve test efficiency, avoid the hydration reaction of early addition activator and cause early occurrence.

Description

Technical Field

[0001] This utility model belongs to the field of paste filling slurry testing technology, specifically relating to an integrated device for preparing and testing the fluidity of paste filling materials in coal mine goaf areas. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Coal mining leads to problems such as goaf and coal gangue pollution. To address this issue, existing technologies employ paste filling mining technology, which uses coal gangue as raw material to prepare paste filling slurry. The prepared filling slurry is then transported via pipeline to fill the goaf, thus supporting the overlying rock strata and controlling surface subsidence.

[0004] Since the filling slurry is prepared on the surface and then transported underground via pipelines, it is necessary to conduct indoor tests on the fluidity of the filling slurry based on the actual site conditions to obtain relevant mixing parameters so that it can meet the actual site pipeline transportation requirements.

[0005] To test the flow properties of a specific filler slurry mix, the existing technique involves preparing the filler slurry in a mixing tank according to the specified mix ratio beforehand, and then transferring the slurry to an L-shaped pipe using a container and lifting device for a flowability test. To ensure the validity of the test results, the test needs to be repeated for verification. Each mix ratio should be tested at least three times, and the average of the three test results should be taken as the flowability result for the current mix ratio.

[0006] Because flowability testing requires the preparation of many batches of filling slurry with different proportions, the existing technology relies on a mixing tank to prepare the filling slurry, then transfers it to a container, and uses a lifting device to transfer the filling slurry to an L-shaped pipe for flowability testing. This results in low testing efficiency when conducting flowability tests on large batches of filling slurries with different proportions and high repeatability. Furthermore, using a single mixing tank can cause premature hydration reactions when adding activators, leading to the premature consumption of the active ingredients in the activator. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide an integrated device for the preparation and flowability testing of paste filling materials in coal mine goaf areas. The integrated device can connect the two stages of filling slurry preparation and flowability testing, thereby improving the testing efficiency. It can also solve the problem that using a single mixing tank can lead to premature hydration reaction when adding activators.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An integrated device for preparing and testing the fluidity of paste filling materials for coal mine goaf is provided, including a raw material storage system, a staged stirring system, an activator storage system, and an L-tube testing system;

[0010] The stage mixing system includes a first mixer, the discharge port of which is connected to the inlet of a second mixer; the raw material storage system includes a first tank, a second tank, a third tank, and a water storage tank, the discharge ports of which are all connected to the inlet of the first mixer.

[0011] The activator storage system includes a fourth tank, a fifth tank, and a sixth tank, and the outlets of the fourth, fifth, and sixth tanks are all connected to the inlet of the second mixer.

[0012] The L-tube test system includes a slurry tank, with an L-shaped tube connected to the bottom of the slurry tank, and the outlet of the second mixer connected to the top of the slurry tank; the L-shaped tube includes a vertical tube connected to the bottom of the slurry tank, the other end of the vertical tube connected to a horizontal tube, and a valve installed on the vertical tube.

[0013] Preferably, the first tank is a coal gangue powder tank, the second tank is a cement tank, the third tank is a river sand aggregate tank, the fourth tank is a sodium hydroxide tank, the fifth tank is a calcium hydroxide tank, and the sixth tank is a water glass tank.

[0014] Preferably, the first tank, the second tank, the third tank, the fourth tank, the fifth tank, and the sixth tank all include a tank body, with a discharge pipe at the bottom and a top cover at the top; the discharge pipes are all connected to the top inlet of the first mixer or the second mixer through a conveying pipe; the slurry tank also includes a tank body and a top cover.

[0015] Preferably, the water storage tank includes a tank body, with a water outlet pipe at the bottom and a top cover at the top; the water outlet pipe is connected to the top feed port of the first mixer through a material conveying pipe.

[0016] Preferably, the bottom of the first tank, second tank, third tank, water storage tank, fourth tank, fifth tank, sixth tank, and slurry tank are all equipped with supports, which are used to place the tanks on the corresponding platforms. The first mixer or the second mixer is placed under the corresponding platform, and the conveying pipe passes through the platform.

[0017] Preferably, valves are installed on the conveying pipes connected to the bottom of the first tank, second tank, third tank, water storage tank, fourth tank, fifth tank and sixth tank.

[0018] Preferably, the top cover includes a sealing opening, a sealing cap is provided inside the sealing opening, and a handle is fixed to the top of the sealing cap.

[0019] Preferably, a slurry conveying pipeline is provided between the discharge port of the first mixer and the inlet of the second mixer, and between the discharge port of the second mixer and the inlet of the slurry tank side wall, and a slurry pump is installed on the slurry conveying pipeline.

[0020] Preferably, both the first mixer and the second mixer are twin-shaft mixers, each including a mixing tank. The top of the mixing tank is provided with multiple feed inlets, and the bottom side wall is provided with a discharge outlet.

[0021] Preferably, flange connections are used for the connection between the slurry conveying pipeline and the slurry tank and the mixer, as well as the connection between the conveying pipeline and each tank or water tank and the mixer.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are:

[0023] The integrated device of this utility model, by setting up a slurry pump between the first and second mixers and between the second mixer and the slurry tank, can connect the two stages of filling slurry preparation and flowability testing, thereby improving the test efficiency. The first mixer fully mixes the basic raw materials to establish a stable slurry skeleton, and then the initially mixed filling slurry is sent to the second mixer to mix the activator. This avoids the problem of premature contact between the activator and water, which would lead to premature hydration reaction. Attached Figure Description

[0024] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0025] Figure 1 This is an overall schematic diagram of the integrated device according to an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the raw material storage system according to an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the activator storage system according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the top cover of an embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the mixer of the mixer according to an embodiment of the present utility model;

[0030] In the picture:

[0031] 1. Base plate; 2. Ball mill; 3. First tank; 4. Second tank; 5. Third tank; 6. Water storage tank; 7. First mixer; 701. Mixing box; 702. Motor; 703. Mixing shaft; 8. Valve; 9. Top cover; 10. Slurry conveying pipeline; 11. Slurry pump; 12. Fourth tank; 13. Fifth tank; 14. Sixth tank; 15. Second mixer; 16. Slurry tank; 17. L-shaped pipe; 18. Sealing port; 19. Handle; 20. Sealing cover; 21. Support. Detailed Implementation

[0032] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0033] The present invention will now be described in detail with reference to the accompanying drawings.

[0034] This embodiment discloses an integrated device for preparing and testing the flowability of paste filling materials for coal mine goaf areas, such as... Figure 1 As shown, the system includes a raw material storage system, a staged mixing system, an activator storage system, and an L-tube testing system. The staged mixing system includes a first mixer 7, the outlet of which is connected to the inlet of a second mixer 15. The raw material storage system includes a first tank 3, a second tank 4, a water tank 6, and a third tank 5, the outlets of which are all connected to the inlet of the first mixer 7. The activator storage system includes a fourth tank 12, a fifth tank 13, and a sixth tank 14, the outlets of which are all connected to the inlet of the second mixer 15. The L-tube testing system includes a slurry tank 16, the bottom of which is connected to an L-shaped tube 17, and the outlet of the second mixer 15 is connected to the top of the slurry tank 16.

[0035] In this embodiment, the first tank 3, the second tank 4, the water tank 6, and the third tank 5 in the raw material storage system are used to store the basic component raw materials of the filling slurry. The raw material storage system is connected to the first mixer 7, and the basic component raw materials of the first tank 3, the second tank 4, the water tank 6, and the third tank 5 are fed into the first mixer 7 for mixing to establish a stable slurry skeleton.

[0036] In this embodiment, the fourth tank 12, the fifth tank 13, and the sixth tank 14 in the activator storage system are used to hold the activator components of the filling slurry. The activator storage system is connected to the second mixer 15. The activator components of the fourth tank 12, the fifth tank 13, and the sixth tank 14 are fed into the second mixer 15 and stirred to obtain the final modified filling slurry. The final filling slurry is then transported to the slurry tank 16, and the flowability of the filling slurry with the current ratio is tested through the L-shaped pipe 17.

[0037] like Figure 1 , Figure 3 As shown, specifically, the L-shaped pipe 17 includes a vertical pipe connected to the bottom of the slurry tank 16, and the other end of the vertical pipe is connected to a horizontal pipe. A valve 8 is installed on the vertical pipe. After the filling slurry is fed into the slurry tank 16, the valve 8 on the L-shaped pipe 17 is opened to start the flow performance characterization parameter test. The filling slurry is allowed to flow by gravity through the L-shaped pipe 17. After the filling slurry stops flowing, the height h0 of the stationary column in the vertical pipe is measured. The time interval t from the flow to the stationary state of the filling slurry is measured with a stopwatch, and the weight G of the outflowing filling slurry is weighed. The corresponding pipe wall shear stress τ, yield stress τ0, viscosity coefficient η, and other flow performance characterization parameters of the filling material are calculated using the corresponding formulas.

[0038] like:

[0039]

[0040] Where: t is the flow time, s; G is the mass of the filling slurry flowing out within time t, kg; γ is the bulk density of the filling slurry, N / m³ 3 D is the inner diameter of the pipe, in meters (m).

[0041]

[0042] Where: h is the height of the vertical pipe, m; h' is the height of the filling slurry in the tank, m; g is the acceleration due to gravity, 9.8 m / s; h0 is the height of the stationary material column in the vertical pipe, m; L is the length of the horizontal pipe, m.

[0043]

[0044]

[0045]

[0046] like Figures 1 to 3 As shown, the first tank 3, the second tank 4, the third tank 5, the fourth tank 12, the fifth tank 13, and the sixth tank 14 all include a tank body, with a discharge pipe at the bottom and a top cover 9 at the top; the discharge pipes are all connected to the top inlet of the first mixer 7 or the second mixer 15 via a conveying pipe. The slurry tank 16 also includes a tank body, with a top cover 9 at the top and an L-shaped pipe 17 at the bottom.

[0047] like Figure 1 , Figure 2 As shown, the water storage tank 6 includes a tank body, a water outlet pipe is also provided at the bottom of the tank body, and a top cover 9 is provided at the top; the water outlet pipe is connected to the top feed port of the first mixer 7 through a material conveying pipe; it is used to add water into the first mixer 7.

[0048] In this embodiment, as Figures 1 to 3 As shown, the first tank (3) is a coal gangue powder tank, the second tank (4) is a cement tank, the third tank (5) is a river sand aggregate tank, the fourth tank (12) is a sodium hydroxide tank, the fifth tank (13) is a calcium hydroxide tank, and the sixth tank (14) is a water glass tank. Before preparation, the raw materials or activator components of each basic component are weighed in advance according to the proportion, and then added to the corresponding tanks. When the test begins, they are added to the first mixer (7) or the second mixer (15) in sequence.

[0049] By feeding coal gangue powder, cement, water, and river sand aggregate (such as Yellow River sand) into the first mixer 7 for mixing, an initial filling slurry with a stable slurry skeleton is prepared. Then, it is fed into the second mixer 15 for mixing, and an activator is added to improve its performance, finally obtaining the filling slurry for testing.

[0050] In this embodiment, the cement hydration reaction rate in the filling slurry is controlled by water glass, thereby controlling the setting time of the filling slurry and enabling it to solidify and form quickly when applied in the goaf. Sodium hydroxide solution and calcium hydroxide solution are used as alkaline activators to activate the hydration reaction activity of cement and coal gangue powder, allowing the materials in the filling slurry to undergo sufficient hydration reaction, thereby improving the strength and performance of the paste filling material.

[0051] In this embodiment, a staged stirring system is used, that is, the filling slurry is mixed twice. The purpose is that if the activator is added directly in the first stirring, the activator will come into contact with water in the initial mixing stage, causing the hydration reaction to occur too early, which will lead to the premature consumption of the active ingredients of the activator and increase the cost of the activator.

[0052] Therefore, by adopting a staged mixing system and precisely controlling the process in stages (coordinated control of the first mixer 7 and the second mixer 15), cement, aggregate, coal gangue powder, water, etc. are first fully mixed and stirred, and then an activator is added for further mixing and stirring, which can prevent the active ingredients of the admixture from being consumed prematurely.

[0053] It should be noted that the bottom of the first tank 3, the second tank 4, the third tank 5, the water storage tank 6, the fourth tank 12, the fifth tank 13, the sixth tank 14, and the slurry tank 16 are all equipped with supports 21, which are used to place the tanks on the corresponding platforms. The first mixer 7 or the second mixer 15 is placed under the corresponding platform, and the conveying pipe passes through the platform. The basic component raw materials of the first tank 3, the second tank 4, and the third tank 5, or the activator components inside the fourth tank 12, the fifth tank 13, and the sixth tank 14 can flow into the first mixer 7 or the second mixer 15 through the pipes under their own weight.

[0054] It should be explained that the conveying pipes connecting the first tank 3, the second tank 4, and the third tank 5 to the first mixer 7 can be vertically connected or inclined vertically connected to ensure that the basic component raw materials can flow into the first mixer 7 under their own weight; the conveying pipes connecting the fourth tank 12, the fifth tank 13, and the sixth tank 14 to the second mixer 15 also need to be vertically connected. The conveying pipe of the sixth tank 14 can be horizontally inclined because the water glass solution can flow in accordance with the horizontally inclined conveying pipe; therefore, the conveying pipe of the water storage tank 6 can also be horizontally inclined.

[0055] In one specific implementation, the bottom of the tank can be set in a funnel shape to facilitate the outflow of basic component raw materials or activator components from the tank.

[0056] like Figure 4 As shown, the top cover 9 includes a sealing opening 18, within which a cover 20 is disposed. A handle 19 is fixed to the top of the cover 20. The cover 20 is removed from the sealing opening 18 via the handle 19, and then the basic component raw materials or activator components are added to the tank or box through the sealing opening 18, or water is added to the tank or box for cleaning through the sealing opening. After completing all the mixing ratio tests, the covers 20 on the top of each tank or box are then fastened.

[0057] like Figures 1 to 3 As shown, a slurry conveying pipe 10 is provided between the discharge port of the first mixer 7 and the inlet of the second mixer 15, and between the discharge port of the second mixer 15 and the inlet of the slurry tank 16. A slurry pump 11 (such as a centrifugal slurry pump, which has the advantages of low cost and large flow rate) is provided on the slurry conveying pipe 10 to convey filling slurry.

[0058] like Figures 1 to 3 As shown, valves 8 are installed on the conveying pipes connected to the bottom of the first tank 3, the second tank 4, the water storage tank 6, the third tank 5, the fourth tank 12, the fifth tank 13, and the sixth tank 14. Opening the valves 8 on the corresponding conveying pipes allows the basic component raw materials or activator components in the corresponding tanks to flow out of the tanks and enter the first mixer 7 or the second mixer 15 to participate in the mixing.

[0059] like Figure 5 As shown, both the first mixer 7 and the second mixer 15 are horizontal twin-shaft mixers, each including a mixing tank 701. Multiple feed inlets are located at the top of the mixing tank 701, and a discharge outlet is located on the bottom side wall of the mixing tank. Two mixing shafts 703 are rotatably mounted inside the mixing tank 701. These shafts are driven by a motor 702 located on one side of the mixing tank. This is achievable with existing technology, and this embodiment does not involve any improvement to the mixer; therefore, it will not be elaborated upon further.

[0060] In this embodiment, the advantage of using a twin-shaft mixer is that it significantly reduces dead zones in the mixing process, allowing the coal gangue powder, cement, river sand aggregate, and water to be mixed more thoroughly and uniformly within the mixing tank. This effectively improves the quality of the filling slurry and ensures the accuracy of the flowability test results. During mixing, the mixing speed is controlled between 30 and 60 revolutions per minute (rpm) to ensure that the quality and performance of the mixture meet the requirements, and to avoid segregation that may occur due to excessive speed.

[0061] like Figure 1 As shown, the raw material storage system also includes a ball mill 2, which is set on the bottom plate 1 and is used to grind coal gangue into powder. Then, according to the corresponding ratio, the powder is weighed and put into the first tank.

[0062] In this embodiment, the connections between the conveying pipeline and each tank or water tank, and the mixer, as well as the connections between the slurry conveying pipeline and the slurry tank and mixer, are all made using flanges. That is, the discharge pipe or water outlet pipe can be connected to the conveying pipeline via flanges. When the conveying pipeline becomes blocked, the operator can quickly separate the conveying pipeline from the corresponding tank by disassembling the flange for cleaning or replacement.

[0063] Understandably, the discharge and inlet ports of the mixer can also be connected to the slurry delivery pipeline using flanges, and the top feed port of the slurry tank can also be connected to the slurry delivery pipeline using flanges, which facilitates cleaning, inspection, and replacement.

[0064] In this embodiment, the L-shaped tube 17 can be made of transparent acrylic; the first tank, second tank, third tank, water tank, fourth tank, fifth tank, sixth tank, and slurry tank can all be made of stainless steel. The connection between the slurry tank and the L-shaped tube can also be a flange.

[0065] A specific implementation method:

[0066] Based on the following proportions as an example, weigh the corresponding materials: cement is 420 kg / m³. 3 Coal gangue is 280 kg / m³ 3 The Yellow River sand concentration is 560 kg / m³. 3 Water is 490 kg / m³ 3 The water glass (Na2SiO3 solution) concentration is 21.0 kg / m³. 3 The concentration of NaOH is 16.8 kg / m³. 3 The Ca(OH)2 concentration is 21.0 kg / m³. 3 .

[0067] First, the coal gangue is put into the ball mill 2 and mechanically crushed into fine powder. The corresponding mass of coal gangue powder is then weighed and sent to the first tank 3.

[0068] Meanwhile, weigh out the corresponding amounts of water, cement, and Yellow River sand and add them to the water storage tank, the second tank, and the third tank, respectively. Weigh out the corresponding amounts of NaOH, Ca(OH)2, and water glass and add them to the fourth tank, the fifth tank, and the sixth tank, respectively.

[0069] First, the coal gangue powder, cement, and Yellow River sand are transported to the first mixer 7 under their own weight. The first mixer 7 is then turned on to dry mix the solid powder raw materials, ensuring that the materials are evenly dispersed. The mixing speed is controlled at 30 revolutions per minute (rpm) for about 5 minutes. Then, the corresponding valve 8 of the water storage tank 6 is turned to slowly inject mixing water. The mixture is first stirred at a low speed of 50 revolutions per minute (rpm) for 5 minutes to promote the initial hydration reaction. Then, it is stirred at a high speed of 100 revolutions per minute (rpm) for 5 minutes to bring the materials to a plastic rheological state.

[0070] Then open the discharge port of the first mixer 7 and start the slurry pump 11 between the first mixer 7 and the second mixer 15 to transport the initially mixed filling slurry to the second mixer 15.

[0071] Then, NaOH, Ca(OH)2, and water glass are fed to the second mixer 15 for secondary mixing. The mixing speed is controlled between 50 and 100 revolutions per minute (rpm) to improve the performance of the filling slurry.

[0072] Finally, under the action of the slurry pump 11 between the second mixer 15 and the slurry tank 16, the secondary-mixed filling slurry is sent into the slurry tank 16 for the flowability test of the filling slurry.

[0073] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. An integrated device for preparing and testing the flowability of paste filling materials for coal mine goaf areas, characterized in that, This includes a raw material storage system, a staged mixing system, an activator storage system, and an L-tube testing system; The stage mixing system includes a first mixer, the discharge port of which is connected to the inlet of a second mixer; the raw material storage system includes a first tank, a second tank, a third tank, and a water storage tank, the discharge ports of the first tank, the second tank, the water storage tank, and the third tank are all connected to the inlet of the first mixer. The activator storage system includes a fourth tank, a fifth tank, and a sixth tank, and the outlets of the fourth tank, the fifth tank, and the sixth tank are all connected to the inlet of the second mixer. The L-tube test system includes a slurry tank, the bottom of which is connected to an L-shaped tube, and the outlet of the second mixer is connected to the top of the slurry tank. The L-shaped tube includes a vertical tube connected to the bottom of the slurry tank, the other end of which is connected to a horizontal tube, and a valve is installed on the vertical tube.

2. The integrated device for preparing and testing the flowability of paste filling material in coal mine goaf as described in claim 1, characterized in that, The first tank is a coal gangue powder tank, the second tank is a cement tank, the third tank is a river sand aggregate tank, the fourth tank is a sodium hydroxide tank, the fifth tank is a calcium hydroxide tank, and the sixth tank is a water glass tank.

3. The integrated device for preparing and testing the flowability of paste filling material in coal mine goaf as described in claim 2, characterized in that, The first tank, the second tank, the third tank, the fourth tank, the fifth tank, and the sixth tank all include a tank body, with a discharge pipe at the bottom and a top cover at the top; the discharge pipes are all connected to the top inlet of the first mixer or the second mixer through a conveying pipe; the slurry tank also includes a tank body and a top cover.

4. The integrated device for preparing and testing the flowability of paste filling material in coal mine goaf as described in claim 3, characterized in that, The water storage tank includes a tank body, a water outlet pipe at the bottom of the tank body, and a top cover at the top; the water outlet pipe is connected to the top feed port of the first mixer through the material conveying pipe.

5. The integrated device for preparing and testing the flowability of paste filling material in coal mine goaf as described in claim 4, characterized in that, The bottom of the first tank, the second tank, the third tank, the water storage tank, the fourth tank, the fifth tank, the sixth tank, and the slurry tank are all equipped with supports, which are used to place them on the corresponding platforms. The first mixer or the second mixer is placed under the corresponding platform, and the conveying pipe passes through the platform.

6. The integrated device for preparing and testing the flowability of paste filling material in coal mine goaf as described in claim 5, characterized in that, Valves are installed on the conveying pipes connected to the bottom of the first tank, the second tank, the third tank, the water storage tank, the fourth tank, the fifth tank, and the sixth tank.

7. The integrated device for preparing and testing the flowability of paste filling material in coal mine goaf as described in claim 3, characterized in that, The top cover includes a sealing opening, a sealing cap is provided inside the sealing opening, and a handle is fixed to the top of the sealing cap.

8. The integrated device for preparing and testing the flowability of paste filling material in coal mine goaf as described in claim 1, characterized in that, A slurry conveying pipeline is provided between the discharge port of the first mixer and the inlet of the second mixer, and between the discharge port of the second mixer and the inlet of the side wall of the slurry tank. A slurry pump is installed on the slurry conveying pipeline.

9. The integrated device for preparing and testing the flowability of paste filling material in coal mine goaf as described in claim 8, characterized in that, Both the first mixer and the second mixer are twin-shaft mixers and include a mixing tank. The top of the mixing tank is provided with multiple feed inlets, and the bottom side wall is provided with a discharge outlet.

10. The integrated device for preparing and testing the flowability of paste filling material in coal mine goaf as described in claim 9, characterized in that, The connections between the slurry delivery pipeline and the slurry tank and the mixer, as well as the connections between the delivery pipeline and each tank or water tank and the mixer, are all made using flange connections.

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