Heavy metal detection device and heavy metal solidification method in tailings

Abstract

This invention belongs to the field of heavy metal detection technology, specifically a heavy metal detection device and a method for solidifying heavy metals in tailings. The device includes a detection cylinder with a sealing cap at its top. The detection cylinder has an inlet pipe and an outlet pipe. A rotating shaft is located on the bottom surface of the sealing cap, and a motor for starting the rotating shaft is located on the top surface of the sealing cap. A first groove is formed on the bottom surface of the rotating shaft. By injecting slurry into the detection cylinder through the inlet pipe, the rotating shaft is driven by the motor, which in turn drives a connecting shaft to rotate. At this time, the stirring blades agitate the slurry, allowing the heavy metal particles in the slurry to be evenly distributed. An electric telescopic rod controls the up-and-down movement of the connecting shaft, enabling the detector to detect heavy metals at different depths in the slurry, thereby improving the accuracy and reliability of the final detection results.

Description

Technical Field

[0001] This invention belongs to the field of heavy metal detection technology, specifically a heavy metal detection device and a method for solidifying heavy metals in tailings. Background Technology

[0002] The heavy metal content in tailings is a key indicator determining emission standards and environmental protection measures. Therefore, it is necessary to systematically test the main harmful heavy metals such as lead, chromium, cadmium, arsenic, and mercury in tailings samples. By dissolving tailings samples into a slurry, all heavy metals in the sample are dissolved and converted into ionic forms, entering the solution, and then being tested to accurately obtain the total concentration of various heavy metals. This data can objectively reflect the severity of pollution, identify the main pollutants and their distribution characteristics, and provide a scientific basis for selecting appropriate heavy metal solidification and stabilization processes. It is an important foundation for achieving safe tailings disposal and pollution control.

[0003] Chinese patent application CN201720579413.9 discloses a rapid and continuous detection device for heavy metals in tailings. The key technical features of the device are: a PLC, a test cylinder, a detector, a rod, and a stirring shaft. The PLC includes a display module and a storage module. The stirring shaft is positioned above the test cylinder. The detector is connected to the stirring shaft via the rod. The rod and the stirring shaft are equipped with wires. The detector contains a microelectrode, a digital signal processor, and a signal converter connected in sequence.

[0004] However, in practical applications, it has been found that while the detector at a fixed position can detect heavy metal ions in real time during the stirring of the slurry by the rotating rod, the position of the detector on the rotating rod cannot be adjusted, making it difficult to sample and analyze at different depths in the slurry. This single-depth detection method limits the representativeness of the sampling and cannot fully reflect the actual distribution of heavy metal ions in the slurry, thus affecting the accuracy and reliability of the final detection results. Therefore, this invention provides a heavy metal detection device and a method for solidifying heavy metals in tailings. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: A heavy metal detection device of the present invention includes a detection cylinder, a sealing cap at the top of the detection cylinder, and an inlet pipe and an outlet pipe on the detection cylinder; a rotating shaft is provided on the bottom surface of the sealing cap, and a motor for starting the rotation of the rotating shaft is provided on the top surface of the sealing cap; a first sliding groove is opened on the bottom surface of the rotating shaft, a connecting shaft is provided in the first sliding groove, multiple sets of stirring blades are fixedly connected to the outer side wall of the connecting shaft, a connecting rod is fixedly connected to the outer side wall of the connecting shaft, and a detection mechanism is provided on the connecting rod; an electric telescopic rod is fixedly connected to the top surface of the inner wall of the first sliding groove, and the output end of the electric telescopic rod is fixedly connected to the connecting shaft.

[0007] Preferably, the detection mechanism includes a second slide groove formed at the end of the connecting rod away from the connecting shaft, an adjusting rod is slidably connected in a sealed manner in the second slide groove, a detector is fixedly connected at the end of the adjusting rod away from the connecting shaft, and a moving component for controlling the movement of the adjusting rod is provided on the connecting shaft.

[0008] Preferably, the moving component includes a cavity formed in the connecting shaft, a connecting hole on the connecting rod communicating with the cavity and the second slide groove, the connecting shaft being slidably and sealingly connected to the inner wall of the first slide groove, a pair of through holes communicating with the cavity being formed on the top surface of the connecting shaft, and a spring being fixedly connected between the end of the adjusting rod near the connecting shaft and the inner wall of the second slide groove.

[0009] Preferably, a rotating rod is rotatably connected to the bottom surface of the inner wall of the detection cylinder, and a scraper is fixedly connected to the outer wall of the rotating rod. The bottom surface of the scraper is in contact with the bottom surface of the inner wall of the detection cylinder, and a rotating assembly for driving the rotating rod to rotate is provided inside the detection cylinder.

[0010] Preferably, the rotating assembly includes a slot formed on the top surface of the rotating rod, and a locking block is fixedly connected to the bottom surface of the connecting shaft, the locking block being engaged with the slot.

[0011] Preferably, the bottom surface of the detection cylinder is provided with a guide groove, the bottom surface of the guide groove is inclined, and the lowest point of the guide groove is located at the same position as the liquid outlet pipe.

[0012] Preferably, a scraper ring is slidably connected to the inner wall of the detection cylinder, a lead screw is threaded onto the scraper ring, the lead screw is rotatably connected to the bottom surface of the inner wall of the sealing cover, and a control component for controlling the rotation of the lead screw is provided inside the detection cylinder.

[0013] Preferably, the control component includes a first gear fixedly connected to the outer wall of the connecting shaft, a drive rod rotatably connected to the bottom surface of the sealing cover, a second gear fixedly connected to the surface of the drive rod, and a third gear fixedly connected to the lead screw and meshing with the second gear, wherein the first gear and the second gear are meshed together.

[0014] A method for solidifying heavy metals in tailings, the method employing the aforementioned heavy metal detection device, and the method comprising the following steps: S1: Select a tailings sample, dissolve the tailings sample into a slurry, and then inject the slurry into the detection cylinder through the inlet pipe and wait for detection; S2: The motor drives the connecting shaft to rotate, which stirs the slurry with the stirring blades, so that the heavy metal particles in the slurry are evenly distributed. Then, the heavy metals are detected by the detector. S3: During the detection process, the connecting shaft is controlled to move up and down, while the adjusting rod is controlled to move back and forth horizontally, so that the position of the detector in the slurry keeps changing. At this time, the detector can accurately obtain the heavy metal data.

[0015] The method also includes the following steps: A1: Based on the obtained data, the cementitious phase is prepared, which consists of fly ash and blast furnace slag. An alkaline solution is prepared by dissolving solid sodium hydroxide in water glass solution, stirring evenly, sealing and letting it stand to allow it to fully react and mature. A2: Dry and sieve the fly ash and slag, and dry the tailings at the same time. Mix the pretreated fly ash, slag and other cementing materials with the dried tailings in a mixer for 3-5 minutes. Slowly add the matured alkaline activator solution to the dry mixture and continue stirring until the mixture forms a viscous slurry with uniform color and no dry powder particles. A3: Pour the mixed slurry into the mold and vibrate or compact it appropriately to remove internal air bubbles and increase the density of the solidified body. After molding, immediately cover the surface with plastic wrap to prevent moisture from evaporating too quickly. A4: After sealing and curing the sample or treatment body at room temperature (approximately 20±2°C) and high humidity (relative humidity ≥90%) for 24-48 hours, demold it. After demolding, it can continue to be cured under the same temperature and humidity conditions, or at least ensure sealed curing until the required age before performance testing.

[0016] The beneficial effects of this invention are as follows: 1. This invention injects slurry into the detection cylinder through the inlet pipe, and drives the rotating shaft to rotate using a motor. This rotating shaft then drives the connecting shaft to rotate, and the stirring blades agitate the slurry, allowing the heavy metal particles in the slurry to be evenly distributed. The connecting shaft is moved up and down by an electric telescopic rod, allowing the detector to detect heavy metals at different depths in the slurry, thereby improving the accuracy and reliability of the final detection results.

[0017] 2. During the detection process, the present invention can control the adjusting rod to move back and forth, thereby moving the detector to increase the detection range of the detector in the slurry and further improve the accuracy and reliability of the detection data. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the detection device in this invention; Figure 2 This is a schematic diagram of the internal structure of the detection cylinder in this invention; Figure 3 This is a schematic diagram of the internal structure of the rotating shaft, connecting shaft, and connecting rod in this invention; Figure 4 yes Figure 2 Enlarged view of point A; Figure 5 yes Figure 3 Enlarged view of point B; Figure 6 This is a cross-sectional view of the detection cylinder in this invention; Figure 7 This is a flowchart of the method in this invention.

[0020] In the diagram: 1. Detection cylinder; 2. Sealing cover; 3. Motor; 4. Rotating shaft; 5. Connecting shaft; 6. Stirring blade; 7. Connecting rod; 8. Detector; 9. Inlet pipe; 10. Outlet pipe; 11. Adjusting rod; 12. First slide groove; 13. Electric telescopic rod; 14. Cavity; 15. Through hole; 16. Connecting hole; 17. Second slide groove; 18. Spring; 19. Rotating rod; 20. Scraper; 21. Slot; 22. Block; 23. Guide groove; 24. Lead screw; 25. Scraper ring; 26. Drive rod; 27. First gear; 28. Second gear; 29. ​​Third gear. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1: As Figures 1 to 5As shown in the figure, a heavy metal detection device according to an embodiment of the present invention includes a detection cylinder 1, a sealing cover 2 at the top of the detection cylinder 1, an inlet pipe 9 and an outlet pipe 10 on the detection cylinder 1; a rotating shaft 4 is provided on the bottom surface of the sealing cover 2, and a motor 3 for starting the rotating shaft 4 is provided on the top surface of the sealing cover 2; a first sliding groove 12 is opened on the bottom surface of the rotating shaft 4, a connecting shaft 5 is provided in the first sliding groove 12, multiple sets of stirring blades 6 are fixedly connected to the outer wall of the connecting shaft 5, a connecting rod 7 is fixedly connected to the outer wall of the connecting shaft 5, and a detection mechanism is provided on the connecting rod 7; an electric telescopic rod 13 is fixedly connected to the top surface of the inner wall of the first sliding groove 12, and the output end of the electric telescopic rod 13 is fixedly connected to the connecting shaft 5; This application dissolves tailings samples into a slurry, which is then injected into the detection cylinder 1 through the inlet pipe 9. A motor 3 drives a rotating shaft 4 to rotate, which in turn drives a connecting shaft 5. At this time, the stirring blades 6 agitate the slurry, ensuring a uniform distribution of heavy metal particles. The detection mechanism can then accurately determine the total concentration of various heavy metals. During the detection process, an electric telescopic rod 13 controls the up-and-down movement of the connecting shaft 5, allowing the detection mechanism to detect heavy metals at different depths in the slurry, thereby improving the accuracy and reliability of the final detection results.

[0023] The detection mechanism includes a second slide groove 17 located at the end of the connecting rod 7 away from the connecting shaft 5. An adjusting rod 11 is slidably connected within the second slide groove 17. A detector 8 is fixedly connected to the end of the adjusting rod 11 away from the connecting shaft 5. A moving component for controlling the movement of the adjusting rod 11 is provided on the connecting shaft 5. When the connecting shaft 5 rotates, the detector 8 rotates synchronously with the connecting shaft 5, allowing the detector 8 to detect heavy metals in the agitated slurry. During the detection process, the adjusting rod 11 can be controlled to move back and forth using the moving component, thereby moving the detector 8 and increasing the detection range of the detector 8 in the slurry to further improve the accuracy and reliability of the detection data.

[0024] The moving component includes a cavity 14 formed within the connecting shaft 5. The connecting rod 7 has a connecting hole 16 communicating with the cavity 14 and the second slide groove 17. The connecting shaft 5 is slidably and sealed to the inner wall of the first slide groove 12. The top surface of the connecting shaft 5 has a pair of through holes 15 communicating with the cavity 14. A spring 18 is fixedly connected between the end of the adjusting rod 11 near the connecting shaft 5 and the inner wall of the second slide groove 17. When the connecting shaft 5 is driven upward by the electric telescopic rod 13, the connecting shaft 5 pushes the gas in the first slide groove 12, causing the gas to enter the cavity 14 through the through hole 15. Then, the gas enters the second slide groove 17 through the connecting hole 16. At this time, the gas pushes the adjusting rod 11, causing the adjusting rod 11 to move away from the connecting shaft 5. When the connecting shaft 5 moves downward, the gas in the second slide groove 17 will flow back. At this time, the spring 18 will pull the adjusting rod 11 to move closer to the connecting shaft 5, thereby achieving the effect of controlling the detector 8 to move back and forth horizontally.

[0025] A rotating rod 19 is rotatably connected to the bottom surface of the inner wall of the detection cylinder 1, and a scraper 20 is fixedly connected to the outer wall of the rotating rod 19. The bottom surface of the scraper 20 is in contact with the bottom surface of the inner wall of the detection cylinder 1. A rotating assembly for driving the rotating rod 19 to rotate is provided inside the detection cylinder 1. If the slurry in this application is not detected in time after being poured into the detection cylinder 1, the heavy metal particles in the slurry will precipitate. At this time, when the slurry is stirred by the stirring blade 6, the rotating assembly can be simultaneously controlled to rotate the rotating rod 19, thereby allowing the rotating rod 19 to control the scraper 20 to rotate. At this time, the scraper 20 scrapes the precipitated metal particles, so that the metal particles can be more quickly and evenly distributed in the slurry.

[0026] The rotating assembly includes a slot 21 on the top surface of the rotating rod 19, and a locking block 22 is fixedly connected to the bottom surface of the connecting shaft 5. The locking block 22 is engaged with the slot 21. When the rotating rod 19 needs to rotate, the connecting shaft 5 can be moved downward by means of the electric telescopic rod 13. During the movement, the motor 3 can control the connecting shaft 5 to rotate slowly. During the rotation of the connecting shaft 5, the locking block 22 will align with the slot 21. Then, under the push of the electric telescopic rod 13, the locking block 22 will engage with the slot 21. Then, the motor 3 can increase the rotation speed of the connecting shaft 5. When the rotating rod 19 does not need to rotate, the connecting shaft 5 can be moved upward to disengage the locking block 22 from the slot 21, so that the connecting shaft 5 can move up and down normally, allowing the detector 8 to detect heavy metals in the slurry.

[0027] The bottom surface of the detection cylinder 1 is provided with a guide groove 23. The bottom surface of the guide groove 23 is inclined, and the lowest point of the guide groove 23 is located at the same position as the liquid outlet pipe 10. In this application, after the heavy metal in the slurry is detected, the slurry can be discharged from the liquid outlet pipe 10. After discharge, some slurry will remain on the bottom surface of the detection cylinder 1. In order not to affect the subsequent heavy metal detection, the rotating component can control the rotating rod 19 to rotate. At this time, the scraper 20 will scrape the slurry on the bottom surface of the inner wall of the detection cylinder 1. During the scraping process, the slurry will enter the guide groove 23 and then be guided by the guide groove 23 into the liquid outlet pipe 10 for discharge. The slurry can be completely discharged by the scraper 20 scraping the bottom surface of the detection cylinder 1 multiple times.

[0028] Example 2: Figure 6 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a scraper ring 25 is slidably connected to the inner wall of the detection cylinder 1, and a lead screw 24 is threadedly connected to the scraper ring 25. The lead screw 24 is rotatably connected to the bottom surface of the inner wall of the sealing cover 2. A control component for controlling the rotation of the lead screw 24 is provided inside the detection cylinder 1. In this application, after the slurry in the detection cylinder 1 is discharged from the outlet pipe 10, the lead screw 24 can be controlled to rotate by the control component, so that the lead screw 24 controls the scraper ring 25 to move downward. At this time, the scraper ring 25 can scrape off the slurry remaining on the inner wall of the detection cylinder 1 to assist the slurry to be discharged. By reversing the lead screw 24, the scraper ring 25 can be moved upward to stabilize it.

[0029] The control assembly includes a first gear 27 fixedly connected to the outer wall of the connecting shaft 5, a drive rod 26 rotatably connected to the bottom surface of the sealing cover 2, a second gear 28 fixedly connected to the surface of the drive rod 26, and a third gear 29 fixedly connected to the lead screw 24, meshing with the second gear 28. The first gear 27 and the second gear 28 are meshed. By controlling the connecting shaft 5 to move upward, the first gear 27 meshes with the second gear 28. At this time, the motor 3 can control the connecting shaft 5 to rotate, thereby causing the first gear 27, the second gear 28, and the third gear 29 to rotate synchronously. At this time, the lead screw 24 will rotate to control the scraper ring 25 to move downward. By controlling the connecting shaft 5 to reverse the direction of rotation of the motor 3, the first gear 27, the second gear 28, and the third gear 29 can also reverse the direction of rotation, so that the lead screw 24 reverses to control the scraper ring 25 to move upward.

[0030] like Figure 7 As shown, a method for solidifying heavy metals in tailings, using the aforementioned heavy metal detection device, includes the following steps: S1: Select a tailings sample, dissolve the tailings sample into a slurry, and then inject the slurry into the detection cylinder 1 through the inlet pipe 9, and wait for detection; S2: The motor 3 drives the connecting shaft 5 to rotate, which in turn stirs the slurry with the stirring blade 6, so that the heavy metal particles in the slurry are evenly distributed. Then, the heavy metals are detected by the detector 8. S3: During the detection process, the connecting shaft 5 is controlled to move up and down, while the adjusting rod 11 is controlled to move back and forth horizontally, so that the position of the detector 8 in the slurry keeps changing. At this time, the detector 8 can accurately obtain the heavy metal data.

[0031] The method also includes the following steps: A1: Based on the obtained data, the cementitious phase is prepared, which consists of fly ash and blast furnace slag. An alkaline solution is prepared by dissolving solid sodium hydroxide in water glass solution, stirring evenly, sealing and letting it stand to allow it to fully react and mature. A2: Dry and sieve the fly ash and slag, and dry the tailings at the same time. Mix the pretreated fly ash, slag and other cementing materials with the dried tailings in a mixer for 3-5 minutes. Slowly add the matured alkaline activator solution to the dry mixture and continue stirring until the mixture forms a viscous slurry with uniform color and no dry powder particles. A3: Pour the mixed slurry into the mold and vibrate or compact it appropriately to remove internal air bubbles and increase the density of the solidified body. After molding, immediately cover the surface with plastic wrap to prevent moisture from evaporating too quickly. A4: After sealing and curing the sample or treatment body at room temperature (approximately 20±2°C) and high humidity (relative humidity ≥90%) for 24-48 hours, demold it. After demolding, it can continue to be cured under the same temperature and humidity conditions, or at least ensure sealed curing until the required age before performance testing.

[0032] Working Principle: The tailings sample is dissolved into a slurry, which is then injected into the detection cylinder 1 through the inlet pipe 9. The motor 3 drives the rotating shaft 4 to rotate, which in turn drives the connecting shaft 5. The stirring blades 6 agitate the slurry, ensuring a uniform distribution of heavy metal particles. The detection mechanism then accurately obtains the total concentration of various heavy metals. During the detection process, the electric telescopic rod 13 controls the up-and-down movement of the connecting shaft 5, allowing the detection mechanism to detect heavy metals at different depths in the slurry, thus improving the accuracy and reliability of the final detection results. As the connecting shaft 5 rotates, the detector 8 rotates synchronously with it, enabling the detector 8 to detect heavy metals in the agitated slurry. During the process, the adjusting rod 11 can be moved back and forth by the moving component, thereby moving the detector 8 to increase the detection range of the detector 8 in the slurry and further improve the accuracy and reliability of the detection data. When the connecting shaft 5 is driven upward by the electric telescopic rod 13, the connecting shaft 5 will push the gas in the first slide groove 12, so that the gas enters the cavity 14 through the through hole 15, and then the gas enters the second slide groove 17 through the connecting hole 16. At this time, the gas will push the adjusting rod 11, so that the adjusting rod 11 moves away from the connecting shaft 5. When the connecting shaft 5 moves downward, the gas in the second slide groove 17 will flow back. At this time, the spring 18 will pull the adjusting rod 11 to move closer to the connecting shaft 5, thereby achieving the effect of controlling the detector 8 to move back and forth horizontally. If the slurry in this application is not tested in time after being poured into the testing cylinder 1, heavy metal particles in the slurry will precipitate. When the slurry is stirred using the stirring blade 6, the rotating component can simultaneously control the rotating rod 19 to rotate, thereby controlling the scraper 20 to rotate. The scraper 20 then scrapes away the precipitated metal particles, allowing them to be more quickly and evenly distributed in the slurry. When the rotating rod 19 needs to rotate, the connecting shaft 5 can be moved downwards using the electric telescopic rod 13. During this movement, the motor 3 can control the connecting shaft 5 to rotate slowly. As the connecting shaft 5 rotates, the locking block 22 aligns with the locking slot 21. Then, under the push of the electric telescopic rod 13, the locking block 22 engages with the locking slot 21, and then the motor 3 accelerates the rotation. When the rotating rod 19 does not need to rotate, the rotation speed of the connecting shaft 5 can be controlled to move the connecting shaft 5 upward, so that the locking block 22 can disengage from the locking slot 21, allowing the connecting shaft 5 to move up and down normally, so that the detector 8 can detect heavy metals in the slurry. In this application, after the heavy metals in the slurry are detected, the slurry can be discharged from the outlet pipe 10. After discharge, some slurry will remain on the bottom surface of the detection cylinder 1. In order not to affect the subsequent heavy metal detection, the rotating component can control the rotating rod 19 to rotate. At this time, the scraper 20 will scrape the slurry on the bottom surface of the inner wall of the detection cylinder 1. During the scraping process, the slurry will enter the guide groove 23 and then be guided by the guide groove 23 into the outlet pipe 10 for discharge. The slurry can be completely discharged by the scraper 20 scraping the bottom surface of the detection cylinder 1 multiple times.

[0033] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0034] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "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. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heavy metal detection device, comprising a detection cylinder (1), wherein a sealing cap (2) is provided at the top of the detection cylinder (1), and an inlet pipe (9) and an outlet pipe (10) are provided on the detection cylinder (1). Its features are: The bottom surface of the sealing cover (2) is provided with a rotating shaft (4), and the top surface of the sealing cover (2) is provided with a motor (3) for starting the rotating shaft (4) to rotate. The bottom surface of the rotating shaft (4) is provided with a first sliding groove (12), and a connecting shaft (5) is provided in the first sliding groove (12). Multiple sets of stirring blades (6) are fixedly connected to the outer side wall of the connecting shaft (5), and a connecting rod (7) is fixedly connected to the outer side wall of the connecting shaft (5). A detection mechanism is provided on the connecting rod (7). An electric telescopic rod (13) is fixedly connected to the top surface of the inner wall of the first slide groove (12), and the output end of the electric telescopic rod (13) is fixedly connected to the connecting shaft (5).

2. The heavy metal detection device according to claim 1, characterized in that: The detection mechanism includes a second slide groove (17) opened at the end of the connecting rod (7) away from the connecting shaft (5), an adjusting rod (11) is slidably connected in the second slide groove (17), a detector (8) is fixedly connected at the end of the adjusting rod (11) away from the connecting shaft (5), and a moving component for controlling the movement of the adjusting rod (11) is provided on the connecting shaft (5).

3. The heavy metal detection device according to claim 2, characterized in that: The moving component includes a cavity (14) opened in the connecting shaft (5), a connecting hole (16) opened on the connecting rod (7) communicating with the cavity (14) and the second slide (17), the connecting shaft (5) is slidably connected to the inner wall of the first slide (12), a pair of through holes (15) opened on the top surface of the connecting shaft (5) communicating with the cavity (14), and a spring (18) is fixedly connected between the end of the adjusting rod (11) near the connecting shaft (5) and the inner wall of the second slide (17).

4. The heavy metal detection device according to claim 1, characterized in that: The bottom inner wall of the detection cylinder (1) is rotatably connected to a rotating rod (19), and a scraper (20) is fixedly connected to the outer wall of the rotating rod (19). The bottom surface of the scraper (20) is in contact with the bottom inner wall of the detection cylinder (1), and a rotating assembly for driving the rotating rod (19) to rotate is provided inside the detection cylinder (1).

5. A heavy metal detection device according to claim 4, characterized in that: The rotating assembly includes a slot (21) on the top surface of the rotating rod (19), and a locking block (22) is fixedly connected to the bottom surface of the connecting shaft (5). The locking block (22) is engaged with the slot (21).

6. The heavy metal detection device according to claim 5, characterized in that: The bottom surface of the detection cylinder (1) is provided with a guide groove (23). The bottom surface of the guide groove (23) is inclined, and the lowest point of the guide groove (23) is located at the same position as the liquid outlet pipe (10).

7. A heavy metal detection device according to claim 1, characterized in that: The inner wall of the detection cylinder (1) is slidably connected to a scraper ring (25), and a screw rod (24) is threadedly connected to the scraper ring (25). The screw rod (24) is rotatably connected to the bottom surface of the inner wall of the sealing cover (2). A control component for controlling the rotation of the screw rod (24) is provided inside the detection cylinder (1).

8. A heavy metal detection device according to claim 7, characterized in that: The control assembly includes a first gear (27) fixedly connected to the outer wall of the connecting shaft (5), a drive rod (26) rotatably connected to the bottom surface of the sealing cover (2), a second gear (28) fixedly connected to the surface of the drive rod (26), and a third gear (29) fixedly connected to the lead screw (24) and meshing with the second gear (28). The first gear (27) and the second gear (28) are meshed together.

9. A method for solidifying heavy metals in tailings, wherein the method employs the heavy metal detection device as described in any one of claims 1-8, characterized in that: The method includes the following steps: S1: Select a tailings sample, dissolve the tailings sample into a slurry, and then inject the slurry into the detection cylinder (1) from the inlet pipe (9); S2: The motor (3) drives the connecting shaft (5) to rotate, so that the stirring blade (6) stirs the slurry, so that the heavy metal particles in the slurry are evenly distributed, and then the heavy metals are detected by the detector (8). S3: During the detection process, control the connecting shaft (5) to move up and down, and at the same time control the adjusting rod (11) to move horizontally, so that the position of the detector (8) in the slurry keeps changing.

10. A method for solidifying heavy metals in tailings according to claim 9, characterized in that: The method also includes the following steps: A1: Based on the obtained data, prepare an alkaline solution by mixing the gel phase, dissolving solid sodium hydroxide in water glass solution, stirring evenly, sealing and letting it stand to allow it to fully react and mature. A2: Dry and sieve the fly ash and slag, and dry the tailings at the same time. Mix the pretreated fly ash, slag and dry tailings thoroughly in a mixer for 3-5 minutes. Slowly add the matured alkaline activator solution to the dry mixture and continue stirring until the mixture forms a viscous slurry with uniform color and no dry powder particles. A3: Pour the mixed slurry into the mold and vibrate it to remove internal air bubbles and increase the density of the solidified body. After molding, cover the surface with plastic wrap to prevent moisture from evaporating too quickly.

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