Praseodymium neodymium chloride solution step-by-step carbon deposition device and technological process thereof

Abstract

The invention relates to the technical field of praseodymium neodymium chloride solution carbon deposition, and discloses a praseodymium neodymium chloride solution step-by-step carbon deposition device which comprises a deposition tank, the outer wall of the deposition tank is fixedly communicated with a liquid inlet pipe, the outer wall of the deposition tank is fixedly communicated with a liquid discharge pipe, and the bottom of the deposition tank is fixedly communicated with a discharge pipe. A switching assembly used for switching liquid added into the depositing tank is arranged on the depositing tank, and a step-by-step assembly used for step-by-step carbon deposition of the praseodymium neodymium chloride solution is arranged on the depositing tank; the switching through pipe is driven to move up and down through the change of the liquid level of liquid in the deposition tank, switching of the liquid entering the deposition tank is achieved through the up-down movement of the switching through pipe, and then in the carbon deposition process of the praseodymium neodymium chloride solution, a precipitant in the liquid storage tank enters the praseodymium neodymium chloride solution in batches to react with the praseodymium neodymium chloride solution; and step-by-step carbon precipitation of the praseodymium neodymium chloride solution is realized, and synchronous precipitation of impurities in the praseodymium neodymium chloride solution due to too high concentration of the precipitant is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon precipitation of praseodymium-neodymium chloride solution, and specifically to a stepwise carbon precipitation device and its process flow for praseodymium-neodymium chloride solution. Background Technique

[0002] Carbon precipitation of praseodymium-neodymium chloride solution is an important rare earth element extraction technology. In this process, a solution containing carbonate ions such as ammonium bicarbonate is used as a precipitant, which reacts with praseodymium-neodymium chloride solution under specific conditions to form praseodymium-neodymium carbonate precipitate, and the required rare earth products are obtained through subsequent steps such as washing and drying of the precipitate.

[0003] In the actual precipitation process of praseodymium-neodymium chloride solution, the praseodymium-neodymium chloride solution contains impurity ions of non-rare earth elements such as aluminum ions. In the precipitation process of praseodymium-neodymium chloride solution, if too much precipitant is added at one time, the co-precipitation conditions of impurity ions and rare earth elements in the praseodymium-neodymium chloride solution will be met due to the too high concentration of the precipitant, resulting in the synchronous precipitation of impurity ions and rare earth elements, increasing the impurity content in the final precipitate and reducing the purity of the precipitate. At the same time, after the reaction is completed, the generated precipitate needs to be washed to remove the residual impurity ions on the surface, and the precipitation tank also needs to be washed for the next use. In the existing washing process, the precipitate and the precipitation tank need to be washed separately, which not only requires setting up separate equipment, but also increases the operation process and prolongs the overall processing time.

[0004] In addition, when the residual liquid in the precipitation tank and the washing water of the precipitate are discharged, due to the stacking state of the precipitate, part of the liquid will remain inside the precipitate and cannot be completely discharged, resulting in too many residual ions on the surface of the precipitate, reducing the washing efficiency. At the same time, due to more residual liquid inside the precipitate, the time required for the subsequent drying step will be prolonged, reducing the overall processing efficiency.

[0005] Therefore, a stepwise carbon precipitation device and its process flow for praseodymium-neodymium chloride solution are proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a stepwise carbon precipitation device and its process flow for praseodymium-neodymium chloride solution to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A stepwise carbon precipitation device for praseodymium-neodymium chloride solution, including a precipitation tank, an inlet pipe is fixedly communicated with the outer wall of the precipitation tank, a drain pipe is fixedly communicated with the outer wall of the precipitation tank, a discharge pipe is fixedly communicated with the bottom of the precipitation tank, and a switching component for switching the liquid added into the precipitation tank is arranged on the precipitation tank.

[0008] Preferably, the switching component includes a stirring through rod which is rotatably connected through the inside of the precipitation tank. The outer wall of the stirring through rod is fixedly communicated with liquid spraying pipes in a linear array. The inner wall of the liquid spraying pipe is fixedly connected with a liquid spraying spring. One end of the liquid spraying spring far away from the stirring through rod is fixedly connected with a plugging spherical ball. A switching through pipe is slidably connected inside the stirring through rod. Liquid spraying ports are linearly and arrayedly formed through the surface of the switching through pipe. A connecting sliding rod is fixedly connected to the bottom of the switching through pipe. A floating ball is fixedly connected to the bottom of the connecting sliding rod. A liquid passing tank is fixedly connected to the top of the precipitation tank. A linkage circular plate is fixedly connected to the top of the switching through pipe. A water passing pipe is fixedly communicated with the side wall of the liquid passing tank. A first baffle is slidably connected to the inner wall of the liquid passing tank. A first connecting column is fixedly connected to the bottom of the first baffle. A liquid passing pipe is fixedly communicated with the side wall of the liquid passing tank. A second baffle is slidably connected to the inner wall of the liquid passing tank. A second connecting column is fixedly connected to the bottom of the second baffle.

[0009] Preferably, the number of the liquid spraying pipes is the same as that of the liquid spraying ports. The connecting sliding rod is slidably connected through the inside of the stirring through rod. The stirring through rod is rotatably connected to the bottom of the liquid passing tank. The first baffle is located on the side where the water passing pipe is communicated with the liquid passing tank. The second baffle is located on the side where the liquid passing pipe is communicated with the liquid passing tank. The first connecting column is slidably connected inside the linkage circular plate. The second connecting column is slidably connected inside the linkage circular plate.

[0010] Preferably, a step-by-step component for step-by-step carbon precipitation of praseodymium-neodymium chloride solution is arranged on the precipitation tank. The step-by-step component includes a liquid storage tank which is fixedly connected to the top of the precipitation tank. One end of the liquid passing pipe far away from the liquid storage tank is communicated with the inside of the liquid storage tank. A linkage rotating rod is rotatably connected to the top of the precipitation tank. A linkage belt is connected between the linkage rotating rod and the stirring through rod in a transmission manner. A step-by-step circular plate is fixedly connected to the surface of the linkage rotating rod. A fixed circular block is eccentrically fixedly connected to the top of the step-by-step circular plate. A step-by-step groove plate is rotatably connected to the bottom of the liquid storage tank. Step-by-step pushing grooves are formed on the surface of the step-by-step groove plate in a circular array. A liquid passing circular plate is fixedly connected to the top of the step-by-step groove plate. The liquid passing circular plate is mutually attached to the bottom of the inner wall of the liquid storage tank. Liquid passing ports are formed through the surface of the liquid passing circular plate.

[0011] Preferably, a shaking component for promoting the discharge of the internal liquid of the precipitation tank is provided on the precipitation tank. The shaking component includes a receiving frame which is rotatably connected to the bottom of the inner wall of the precipitation tank. A linkage groove block is fixedly connected to the inner wall of the receiving frame. Linkage push rods are symmetrically and fixedly connected to the bottom of the stirring through rod. Sliding grooves are symmetrically formed inside the linkage groove block. Sliding plates are slidably connected to the inside of the sliding grooves respectively. A control sliding rod is fixedly connected to the surface of the sliding plate. A return spring is sleeved on the surface of the control sliding rod. Fixed brackets are symmetrically and fixedly connected to the bottom of the stirring through rod. Linkage sliding rods are slidably connected to the inside of the fixed brackets respectively. A control circular block is fixedly connected to the bottom of the linkage sliding rod. A linkage push plate is fixedly connected to the surface of the connecting sliding rod.

[0012] Preferably, the linkage push rod is slidably connected to the inside of the linkage groove block. The control sliding rod penetrates and is slidably connected to the inside of the linkage groove block. One end of the return spring is fixedly connected to the outer wall of the control sliding rod, and the other end of the return spring is fixedly connected to the outer wall of the linkage groove block. The middle part of the inner wall of the control circular block is provided with an inclined surface with the top end close to the control sliding rod.

[0013] The process of stepwise carbon precipitation of praseodymium-neodymium chloride solution includes the following steps:

[0014] Step 1: The praseodymium-neodymium chloride solution is injected into the precipitation tank through a drain pipe, and the pH value of the praseodymium-neodymium chloride solution is adjusted.

[0015] Step 2: The precipitant in the storage tank is added to the precipitation tank in batches, so that it is uniformly mixed with the praseodymium-neodymium chloride solution to form a precipitate, which is deposited inside the receiving frame.

[0016] Step 3: After the reaction between the praseodymium-neodymium chloride solution and the precipitant is completed, the remaining liquid inside the precipitation tank is discharged through the drain pipe.

[0017] Step 4: Wash water is injected into the precipitation tank through a water pipe and a stirring through rod to wash the inner wall of the precipitation tank and the precipitate in the receiving frame. After washing, the precipitate is discharged through a discharge pipe for subsequent steps.

[0018] Preferably, in step 2, the precipitant is directly injected into the praseodymium-neodymium chloride solution through a liquid spraying pipe provided on the stirring through rod, and the uniform mixing of the praseodymium-neodymium chloride solution and the precipitant is realized by the rotation of the stirring through rod.

[0019] Preferably, in step 4, the switching of the washing water and the precipitant inside the stirring through rod is realized by the sliding of a switching pipe, so as to wash the inner wall of the precipitation tank. During the washing process, the liquid inside the precipitation tank is discharged from the gaps of the precipitate through the rotation of the receiving frame.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The up-and-down movement of the switching through-tube is driven by the change in the liquid level of the liquid inside the precipitation tank, and the switching of the liquid entering the precipitation tank is achieved through the up-and-down movement of the switching through-tube. Furthermore, during the carbon precipitation process of neodymium praseodymium chloride solution, the precipitant inside the liquid storage tank enters the neodymium praseodymium chloride solution in batches to react with the neodymium praseodymium chloride solution, realizing the step-by-step carbon precipitation of the neodymium praseodymium chloride solution, avoiding the synchronous precipitation of impurities in the neodymium praseodymium chloride solution due to too high a concentration of the precipitant, ensuring the purity of the carbon precipitation, and when the remaining liquid after the reaction inside the precipitation tank is discharged, the washing water enters the inside of the precipitation tank through the switching through-tube to wash the inner wall and the precipitate of the precipitation tank, reducing the subsequent separate washing steps. At the same time, during the switching process, the switching operation can be automatically completed without additional operation steps, making the operation process more convenient;

[0022] 2. By changing the number of liquid spraying tubes internally connected to the stirring through-rod, when adding the precipitant into the neodymium praseodymium chloride solution, only the liquid spraying tube at the bottom of the stirring through-rod is connected to the inside of the stirring through-rod. Then, the precipitant will be directly injected into the neodymium praseodymium chloride solution through the liquid spraying tube. With the rotation and stirring action of the stirring through-rod, it promotes the uniform mixing of the neodymium praseodymium chloride solution and the precipitant, improving the precipitation reaction rate. When washing water is introduced into the precipitation tank, the arrayed liquid spraying tubes are all connected to the inside of the stirring through-rod, thereby increasing the spraying area of the washing water inside the stirring through-rod, realizing the synchronous washing of the inner wall and the precipitate of the precipitation tank. At the same time, when no liquid is introduced into the stirring through-rod, the blocking ball plugs the outlet of the liquid spraying tube to prevent the precipitate and liquid inside the precipitation tank from entering the stirring through-rod;

[0023] 3. When the neodymium praseodymium chloride solution reacts with the precipitant, the receiving frame is in a static state, which can avoid the rotation of the receiving frame from affecting the particle size of the precipitate and ensure the precipitation quality of the carbon precipitation of the neodymium praseodymium chloride solution. When the liquid inside the precipitation tank is discharged, the receiving frame is in a rotating state, which can promote the discharge of the liquid inside the precipitate, reduce the residual moisture inside the precipitate, reduce the time required for the subsequent drying step, improve the processing efficiency. At the same time, the rotation of the receiving frame keeps the precipitate inside the receiving frame in an active state, increasing the contact area between the washing water and the precipitate and improving the washing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a three-dimensional schematic diagram of the step-by-step component structure of the present invention;

[0026] Figure 3 It is a three-dimensional schematic diagram of the internal structure of the precipitation tank of the present invention;

[0027] Figure 4 of the present inventionFigure 3 Partial enlarged schematic view of the structure at position A in the figure;

[0028] Figure 5 For the present invention Figure 3 Partial enlarged schematic view of the structure at position B in the figure;

[0029] Figure 6 For the present invention Figure 5 Partial enlarged schematic view of the structure at position C in the figure;

[0030] Figure 7 For the present invention Figure 5 Partial enlarged schematic view of the structure at position D in the figure;

[0031] Figure 8 Stereoscopic schematic view of the positional relationship between the receiving frame and the linkage groove block of the present invention.

[0032] In the figure:

[0033] 1. Precipitation tank; 11. Liquid inlet pipe; 12. Drain pipe; 13. Discharge pipe;

[0034] The switching component includes: 21. Stirring through rod; 22. Liquid spraying pipe; 23. Liquid spraying spring; 24. Plugging spherical ball; 25. Switching through pipe; 26. Liquid spraying port; 27. Connecting sliding rod; 28. Floating ball; 29. Liquid passing box; 210. Linkage circular plate; 211. Water passing pipe; 212. First baffle; 213. First connecting column; 214. Liquid passing pipe; 215. Second baffle; 216. Second connecting column;

[0035] The step-by-step component includes: 31. Liquid storage tank; 32. Linkage rotating rod; 33. Linkage belt; 34. Step-by-step circular plate; 35. Fixed circular block; 36. Step-by-step groove plate; 37. Step-by-step pushing groove; 38. Liquid passing circular plate; 39. Liquid passing port;

[0036] The swinging component includes: 41. Receiving frame; 42. Linkage groove block; 43. Linkage push rod; 44. Sliding groove; 45. Sliding plate; 46. Control sliding rod; 47. Return spring; 48. Fixed bracket; 49. Linkage sliding rod; 410. Control circular block; 411. Linkage push plate. Specific embodiments

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to Figures 1 to 8 , which is an embodiment provided by the present invention:

[0039] Example 1:

[0040] A step-by-step carbon precipitation device for neodymium praseodymium chloride solution, comprising a precipitation tank 1. A liquid inlet pipe 11 is fixedly communicated with the outer wall of the precipitation tank 1. A liquid discharge pipe 12 is fixedly communicated with the outer wall of the precipitation tank 1. A discharge pipe 13 is fixedly communicated with the bottom of the precipitation tank 1. A switching assembly is arranged on the precipitation tank 1 for switching the liquid added into the interior of the precipitation tank 1.

[0041] The switching assembly includes a stirring through rod 21. The stirring through rod 21 is rotatably connected through the interior of the precipitation tank 1. A liquid spraying pipe 22 is fixedly communicated with the outer wall of the stirring through rod 21 in a linear array. A liquid spraying spring 23 is fixedly connected to the inner wall of the liquid spraying pipe 22. One end of the liquid spraying spring 23 far away from the stirring through rod 21 is fixedly connected with a plugging spherical ball 24. A switching through pipe 25 is slidably connected to the interior of the stirring through rod 21. Liquid spraying ports 26 are linearly arrayed and penetrated through the surface of the switching through pipe 25. The number of the liquid spraying pipes 22 is the same as that of the liquid spraying ports 26. A connecting sliding rod 27 is fixedly connected to the bottom of the switching through pipe 25. The connecting sliding rod 27 is slidably connected through the interior of the stirring through rod 21. A floating ball 28 is fixedly connected to the bottom of the connecting sliding rod 27. A liquid passing box 29 is fixedly connected to the top of the precipitation tank 1. The stirring through rod 21 is rotatably connected to the bottom of the liquid passing box 29. A linkage circular plate 210 is fixedly connected to the top of the switching through pipe 25. A water passing pipe 211 is fixedly communicated with the side wall of the liquid passing box 29. A first baffle 212 is slidably connected to the inner wall of the liquid passing box 29. The first baffle 212 is located on one side where the water passing pipe 211 is communicated with the liquid passing box 29. A first connecting column 213 is fixedly connected to the bottom of the first baffle 212. The first connecting column 213 is slidably connected to the interior of the linkage circular plate 210. A liquid passing pipe 214 is fixedly communicated with the side wall of the liquid passing box 29. A second baffle 215 is slidably connected to the inner wall of the liquid passing box 29. The second baffle 215 is located on one side where the liquid passing pipe 214 is communicated with the liquid passing box 29. A second connecting column 216 is fixedly connected to the bottom of the second baffle 215. The second connecting column 216 is slidably connected to the interior of the linkage circular plate 210.

[0042] Wherein: The stirring through rod 21 is fixedly connected to the output end of an external motor. The water passing pipe 211 is communicated with an external washing water tank.

[0043] The precipitation tank 1 is provided with a step-by-step assembly for step-by-step carbon precipitation of praseodymium-neodymium chloride solution, the step-by-step assembly includes a liquid storage tank 31, the liquid storage tank 31 is fixedly connected to the top of the precipitation tank 1, one end of the liquid pipe 214 away from the liquid storage tank 31 is interconnected with the interior of the liquid storage tank 31, the top of the precipitation tank 1 is rotatably connected with a linkage rotating rod 32, the linkage rotating rod 32 and the stirring rod 21 are transmission-connected with a linkage belt 33, the surface of the linkage rotating rod 32 is fixedly connected with a step-by-step circular plate 34, the top of the step-by-step circular plate 34 is eccentrically fixedly connected with a fixed round block 35, the bottom of the liquid storage tank 31 is rotatably connected with a step-by-step groove plate 36, the surface of the step-by-step groove plate 36 is provided with step-by-step push grooves 37 in an annular array, the top of the step-by-step groove plate 36 is fixedly connected with a liquid-passing circular plate 38, the liquid-passing circular plate 38 is in contact with the bottom of the inner wall of the liquid storage tank 31, and a liquid-passing port 39 is provided through the surface of the liquid-passing circular plate 38.

[0044] The sedimentation tank 1 is provided with a swinging assembly for promoting the discharge of the internal liquid of the sedimentation tank. The swinging assembly includes a receiving frame 41, which is rotatably connected to the bottom of the inner wall of the sedimentation tank 1. The inner wall of the receiving frame 41 is fixedly connected with a linkage groove block 42. The bottom of the stirring rod 21 is symmetrically fixedly connected with a linkage push rod 43. The linkage push rod 43 is slidably connected to the inside of the linkage groove block 42. The inside of the linkage groove block 42 is symmetrically provided with sliding grooves 44. The inside of the sliding grooves 44 is slidably connected with a sliding plate 45. The surface of the sliding plate 45 is fixedly connected with a control slide rod 46. The control slide rod 46 penetrates and is slidably connected to Inside the linkage groove block 42, a return spring 47 is sleeved on the surface of the control slide rod 46, one end of the return spring 47 is fixedly connected to the outer wall of the control slide rod 46, and the other end of the return spring 47 is fixedly connected to the outer wall of the linkage groove block 42, and the bottom of the stirring rod 21 is symmetrically fixedly connected with a fixed bracket 48, and the interior of the fixed bracket 48 is slidably connected with a linkage slide rod 49, and the bottom of the linkage slide rod 49 is fixedly connected with a control round block 410, and the middle part of the inner wall of the control round block 410 is set as an inclined surface close to the top of the control slide rod 46, and the surface of the connecting slide rod 27 is fixedly connected with a linkage push plate 411.

[0045] The receiving frame 41 is connected to the inside of the discharge pipe 13 , and through holes are evenly formed on the side wall of the receiving frame 41 .

[0046] Embodiment 2:

[0047] The step-by-step carbon precipitation process of praseodymium-neodymium chloride solution includes the following steps:

[0048] Step 1: injecting the praseodymium-neodymium chloride solution into the interior of the precipitation tank 1 through the drain pipe 12, and adjusting the pH value of the praseodymium-neodymium chloride solution;

[0049] Step 2: Add the precipitant in the liquid storage tank 31 into the precipitation tank 1 in batches, so that it is evenly mixed with the praseodymium-neodymium chloride solution to generate precipitate, which is deposited inside the receiving frame 41;

[0050] Step 3: After the reaction between the praseodymium-neodymium chloride solution and the precipitant is completed, the remaining liquid inside the precipitation tank 1 is discharged through the drain pipe 12;

[0051] Step 4: Wash water is injected into the precipitation tank 1 through the water pipe 211 and the stirring through rod 21 to wash the inner wall of the precipitation tank 1 and the precipitate in the receiving frame 41. After the washing is completed, the precipitate is discharged through the discharge pipe 13 for subsequent steps.

[0052] In Step 2, the precipitant is directly injected into the praseodymium-neodymium chloride solution through the liquid spraying pipe 22 provided on the stirring through rod 21, and the uniform mixing of the praseodymium-neodymium chloride solution and the precipitant is achieved by the rotation of the stirring through rod 21.

[0053] In Step 4, the switching of the washing water and the precipitant inside the stirring through rod 21 is realized by the sliding of the switching pipe 25 to wash the inner wall of the precipitation tank 1, and during the washing process, the liquid inside the precipitation tank 1 is discharged from the gaps of the precipitate by the rotation of the receiving frame 41.

[0054] The working principle of the above implementation is as follows:

[0055] The initialization steps are as follows:

[0056] The staff injects the precipitant into the liquid storage tank 31. In the initial state, the switching pipe 25 is at the lowest point inside the stirring through rod 21, the liquid spraying port 26 is in communication with the inside of the liquid spraying pipe 22, the second baffle 215 fits against the communication part between the liquid passing pipe 214 and the liquid passing tank 29 to block the communication part, the sliding plate 45 is on the moving path of the linkage push rod 43, the top inner wall of the control block 410 abuts against the control sliding rod 46, and the return spring 47 is in a compressed state.

[0057] The working operation steps are as follows:

[0058] The following is the process description of the step-by-step carbon precipitation of the praseodymium-neodymium chloride solution by the step-by-step components:

[0059] Such as Figures 2 to 7As shown, the staff injects the praseodymium-neodymium chloride solution into the interior of the precipitation tank 1 through the liquid inlet pipe 11. During the injection of the solution, the floating ball 28 gradually comes into contact with the solution, and the floating ball 28 moves upward inside the solution under the action of buoyancy. The upward movement of the floating ball 28 drives the connecting slide rod 27 to move upward synchronously. Since the connecting slide rod 27 passes through and is slidably connected to the interior of the stirring through rod 21, at this time, restricted by the inner wall of the stirring through rod 21, the connecting slide rod 27 slides straight upward inside the stirring through rod 21. The upward sliding of the connecting slide rod 27 drives the switching through pipe 25 fixedly connected to it to slide upward inside the stirring through rod 21. The upward sliding of the switching through pipe 25 drives the liquid spraying ports 26 on its surface to move synchronously. At this time, the liquid spraying ports 26 will be misaligned with the liquid spraying pipes 22, and the liquid spraying ports 26 are not interconnected with the interior of the liquid spraying pipes 22. At the same time, several liquid spraying pipes 22 located at the bottom of the stirring through rod 21 will still be interconnected with the interior of the switching through pipe 25.

[0060] At the same time, the upward sliding of the switching through pipe 25 drives the linkage circular plate 210 to move upward synchronously. The upward movement of the linkage circular plate 210 drives the first connecting column 213 inside it to move upward. The upward movement of the first connecting column 213 drives the first baffle 212 to slide upward on the inner wall of the liquid passing box 29. The upward sliding of the first baffle 212 will block the connection between the water passing pipe 211 and the liquid passing box 29. The upward movement of the linkage circular plate 210 drives the second connecting column 216 inside it to move upward. The upward movement of the second connecting column 216 drives the second baffle 215 to slide upward on the inner wall of the liquid passing box 29. The upward sliding of the second baffle 215 will no longer block the connection between the liquid passing pipe 214 and the liquid passing box 29.

[0061] After the injection of the praseodymium-neodymium chloride solution is completed, the staff opens the external washing water tank, and at the same time starts the external motor of the stirring through-rod 21 to drive the stirring through-rod 21 to start rotating. The rotation of the stirring through-rod 21 drives the internal switching through-tube 25 to rotate synchronously. The rotation of the stirring through-rod 21 drives the linkage rotating rod 32 to rotate synchronously through the linkage belt 33 connected to it in transmission. The rotation of the linkage rotating rod 32 drives the step circular plate 34 fixedly connected to it to rotate synchronously. The rotation of the step circular plate 34 drives the fixed circular block 35 fixedly connected eccentrically to its top to make a revolution around the center of the step circular plate 34. During the revolution of the fixed circular block 35, the fixed circular block 35 will slide into the internal part of the step pushing groove 37 and push the groove wall of the step pushing groove 37 to drive the step groove plate 36 to rotate. Since the step pushing grooves 37 are arranged in an annular array on the surface of the step groove plate 36, the fixed circular block 35 will periodically enter the internal part of the step pushing groove 37 to push the step groove plate 36 to rotate periodically. The periodic rotation of the step groove plate 36 drives the liquid-passing circular plate 38 fixedly connected to it to rotate periodically inside the liquid storage tank 31. When the rotation of the liquid-passing circular plate 38 makes the liquid-passing port 39 communicate with the connection between the liquid storage tank 31 and the liquid-passing pipe 214, the precipitant inside the liquid storage tank 31 will be sprayed into the internal part of the liquid-passing pipe 214, and enter the internal part of the switching through-tube 25 through the liquid-passing pipe 214 and the liquid-passing box 29. Since only the liquid-spraying pipe 22 at the bottom of the stirring through-rod 21 communicates with the internal part of the switching through-tube 25 at this time, the precipitant sprayed into the internal part of the switching through-tube 25 will enter the liquid-spraying pipe 22 at the bottom of the stirring through-rod 21. Under the impact of the liquid entering the internal part of the liquid-spraying pipe 22, the plugging spherical ball 24 moves away from the stirring through-rod 21 and stretches the liquid-spraying spring 23. The plugging spherical ball 24 no longer plugs the outlet of the liquid-spraying pipe 22. At this time, the precipitant enters the praseodymium-neodymium chloride solution, and is evenly sprayed everywhere inside the praseodymium-neodymium chloride solution along with the rotation of the stirring through-rod 21. With the stirring effect of the stirring through-rod 21, the uniform mixing of the praseodymium-neodymium chloride solution and the precipitant is realized. At the same time, as the liquid-passing circular plate 38 continuously rotates periodically, the precipitant inside the liquid storage tank 31 will intermittently enter the praseodymium-neodymium chloride solution, thereby realizing the step-by-step carbon precipitation of the praseodymium-neodymium chloride solution, avoiding the synchronous precipitation of impurities caused by too high a concentration of the precipitant inside the praseodymium-neodymium chloride solution, and ensuring the purity of the precipitation.

[0062] The following is the process description of the switching component switching to add the liquid inside the precipitation tank 1:

[0063] Such as Figures 3 to 7As shown, when the reaction between the praseodymium-neodymium chloride solution and the precipitant is complete, the precipitate formed by carbonization deposits inside the receiving frame 41. At this time, the staff discharges the remaining liquid inside the precipitation tank 1 through the drain pipe 12. As the floating ball 28 drops with the liquid level and under its own gravity, the floating ball 28 moves downward. The downward movement of the floating ball 28 drives the connecting slide rod 27 to slide vertically downward inside the stirring through rod 21. At this time, the liquid spraying port 26 is once again in communication with the inside of the liquid spraying pipe 22. The downward sliding of the connecting slide rod 27 drives the linkage circular plate 210 to move downward synchronously. The downward movement of the linkage circular plate 210 drives the second connecting column 216 inside it to move downward. The downward movement of the second connecting column 216 drives the second baffle plate 215 to slide downward on the inner wall of the liquid passing box 29 to block the connection between the liquid passing pipe 214 and the liquid passing box 29. The downward movement of the linkage circular plate 210 drives the first connecting column 213 to move downward. The downward movement of the first connecting column 213 drives the first baffle plate 212 fixedly connected to it to slide downward on the inner wall of the liquid passing box 29. The first connecting column 213 no longer blocks the connection between the water passing pipe 211 and the liquid passing box 29. The washing water in the external washing water tank is sprayed into the inside of the switching through pipe 25 through the liquid passing box 29 and the water passing pipe 211, and enters the inside of the liquid spraying pipe 22 through the liquid spraying port 26. Under the impact of the liquid entering the inside of the liquid spraying pipe 22, the blocking spherical ball 24 moves away from the stirring through rod 21 and stretches the liquid spraying spring 23. The blocking spherical ball 24 no longer blocks the outlet of the liquid spraying pipe 22. The washing water is sprayed out from the liquid spraying pipe 22. Since the liquid spraying pipes 22 arranged in an array are all in an open state at this time, the washing water sprayed out from the liquid spraying pipe 22 can wash the inner wall of the precipitation tank 1 during the rotation of the stirring through rod 21 and the liquid spraying pipe 22. At the same time, the washing water falling to the bottom can wash the precipitate inside the receiving frame 41. The washed washing water is discharged through the drain pipe 12, thus realizing the synchronous washing of the inner wall of the precipitation tank 1 and the precipitate, eliminating the need for a separate washing step and improving the processing efficiency.

[0064] The following is an elaboration of the process by which the shaking component promotes the discharge of the liquid inside the precipitate:

[0065] As Figures 3 to 8As shown, the upward movement of the float 28 drives the linkage push plate 411 fixedly connected thereto to move upward synchronously. When the linkage push plate 411 moves to conflict with the linkage slide bar 49, the upward sliding of the linkage push plate 411 drives the linkage slide bar 49 to slide upward inside the fixed bracket 48. The upward sliding of the linkage slide bar 49 drives the control round block 410 fixedly connected thereto to move upward synchronously. Because the middle part of the inner wall of the control round block 410 is set as an inclined surface close to the top end of the control slide bar 46, during the upward movement of the control round block 410, the inner wall of the control round block 410 no longer conflicts with the control slide bar 46. At this time, under the elastic extension action of the return spring 47, the control slide bar 46 slides in the direction of the control round block 410 inside the linkage groove block 42. The sliding of the control slide bar 46 drives the sliding plate 45 to slide in the direction of the control round block 410 into the interior of the sliding groove 44. At this time, the sliding plate 45 is no longer located on the moving path of the linkage push rod 43.

[0066] When the float 28 moves downward, the linkage push plate 411 no longer interferes with the linkage slide bar 49, and the linkage slide bar 49 slides downward inside the fixed bracket 48. The downward sliding of the linkage slide bar 49 drives the control round block 410 to move downward synchronously. The downward movement of the control round block 410 makes the inclined surface inside it interfere with the control slide bar 46, and pushes the control slide bar 46 to slide in the direction away from the control round block 410 inside the linkage groove block 42 while compressing the return spring 47. The sliding of the control slide bar 46 drives the sliding plate 45 fixedly connected thereto to slide away from the control round block 410 and leave the sliding groove 44. At this time, the sliding plate 45 is located on the moving path of the linkage push rod 43, and the rotation of the stirring rod 21 drives the linkage push rod 43 to rotate around the center of the linkage groove block 42. The rotation of the linkage push rod 43 makes it slide inside the linkage groove block 42. When it moves to conflict with the sliding plate 45, the rotation of the linkage push rod 43 causes the linkage groove block 42 and the stirring rod 21 to rotate synchronously by pushing the sliding plate 45. The rotation of the linkage groove block 42 drives the receiving frame 41 fixedly connected thereto to rotate synchronously, and then during the precipitation generation process, the receiving frame 41 is in a stationary state, thereby avoiding the influence of the generated precipitation particle size due to the rotation of the receiving frame 41. During the discharge of the liquid inside the sedimentation tank 1, the centrifugal force generated by the rotation of the receiving frame 41 allows the liquid inside the sediment to be evenly discharged through the through holes on the receiving frame 41, thereby reducing the residual liquid inside the sediment, reducing the time required for the subsequent sedimentation drying step, and improving the overall processing efficiency. At the same time, the rotation of the receiving frame 41 enables the sediment inside the receiving frame 41 to remain in an active state, thereby avoiding the re-agglomeration of the sediment, and also increasing the contact area between the washing water and the sediment, thereby improving the washing efficiency.

[0067] After washing is completed, the internal valve of the discharge pipe 13 is opened, and the sediment in the sedimentation tank 1 is discharged through the discharge pipe 13 .

[0068] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0069] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A step-by-step carbon precipitation device for praseodymium-neodymium chloride solution, comprising a precipitation tank (1), wherein the outer wall of the precipitation tank (1) is fixedly connected to a liquid inlet pipe (11), the outer wall of the precipitation tank (1) is fixedly connected to a liquid discharge pipe (12), and the bottom of the precipitation tank (1) is fixedly connected to a discharge pipe (13), characterized in that: The sedimentation tank (1) is provided with a switching component for switching the liquid added into the sedimentation tank (1).

2. The step-by-step carbon precipitation device for praseodymium-neodymium chloride solution according to claim 1, characterized in that: The switching assembly comprises a stirring rod (21), the stirring rod (21) penetrates and is rotatably connected to the interior of the sedimentation tank (1), the outer wall of the stirring rod (21) is fixedly connected to a liquid spraying pipe (22) in a linear array, the inner wall of the liquid spraying pipe (22) is fixedly connected to a liquid spraying spring (23), one end of the liquid spraying spring (23) away from the stirring rod (21) is fixedly connected to a blocking ball (24), the interior of the stirring rod (21) is slidably connected to a switching tube (25), the surface of the switching tube (25) is penetrated by a liquid spraying port (26) in a linear array, the bottom of the switching tube (25) is fixedly connected to a connecting slide rod (27), and the connecting slide rod (27) The bottom of the sedimentation tank (1) is fixedly connected to a float ball (28), the top of the sedimentation tank (1) is fixedly connected to a liquid box (29), the top of the switching tube (25) is fixedly connected to a linkage circular plate (210), the side wall of the liquid box (29) is fixedly connected to a water pipe (211), the inner wall of the liquid box (29) is slidably connected to a first baffle plate (212), the bottom of the first baffle plate (212) is fixedly connected to a first connecting column (213), the side wall of the liquid box (29) is fixedly connected to a liquid pipe (214), the inner wall of the liquid box (29) is slidably connected to a second baffle plate (215), and the bottom of the second baffle plate (215) is fixedly connected to a second connecting column (216).

3. The step-by-step carbon precipitation device for praseodymium-neodymium chloride solution according to claim 2, characterized in that: The number of the liquid spraying pipes (22) and the number of the liquid spraying ports (26) are the same; the connecting sliding rod (27) penetrates and is slidably connected to the inside of the stirring rod (21); the stirring rod (21) is rotatably connected to the bottom of the liquid passing box (29); the first baffle (212) is located on the side where the water passing pipe (211) is connected to the liquid passing box (29); the second baffle (215) is located on the side where the liquid passing pipe (214) is connected to the liquid passing box (29); the first connecting column (213) is slidably connected to the inside of the linkage circular plate (210); and the second connecting column (216) is slidably connected to the inside of the linkage circular plate (210).

4. The step-by-step carbon precipitation device for praseodymium-neodymium chloride solution according to claim 2, characterized in that: The precipitation tank (1) is provided with a step-by-step assembly for step-by-step carbon precipitation of a praseodymium-neodymium chloride solution, the step-by-step assembly comprising a liquid storage tank (31), the liquid storage tank (31) being fixedly connected to the top of the precipitation tank (1), the end of the liquid passage pipe (214) away from the liquid storage tank (31) being in communication with the interior of the liquid storage tank (31), the top of the precipitation tank (1) being rotatably connected to a linkage rotating rod (32), the linkage rotating rod (32) being transmission-connected to a stirring rod (21) by a linkage belt (33), the surface of the linkage rotating rod (32) A step-by-step circular plate (34) is fixedly connected to the surface, a fixed round block (35) is eccentrically fixedly connected to the top of the step-by-step circular plate (34), a step-by-step slot plate (36) is rotatably connected to the bottom of the liquid storage tank (31), a step-by-step push slot (37) is provided on the surface of the step-by-step slot plate (36) in an annular array, a liquid-passing circular plate (38) is fixedly connected to the top of the step-by-step slot plate (36), the liquid-passing circular plate (38) is in contact with the bottom of the inner wall of the liquid storage tank (31), and a liquid-passing port (39) is provided through the surface of the liquid-passing circular plate (38).

5. The step-by-step carbon precipitation device for praseodymium-neodymium chloride solution according to claim 2, characterized in that: The sedimentation tank (1) is provided with a swinging assembly for promoting the discharge of liquid inside the sedimentation tank, the swinging assembly comprising a receiving frame (41), the receiving frame (41) is rotatably connected to the bottom of the inner wall of the sedimentation tank (1), the inner wall of the receiving frame (41) is fixedly connected with a linkage groove block (42), the bottom of the stirring rod (21) is symmetrically fixedly connected with a linkage push rod (43), the inside of the linkage groove block (42) is symmetrically provided with sliding grooves (44), and the inside of the sliding grooves (44) are slidably connected with A sliding plate (45), the surface of which is fixedly connected to a control slide rod (46), the surface of which is sleeved with a return spring (47), the bottom of the stirring rod (21) is symmetrically fixedly connected to a fixed bracket (48), the interior of which is slidably connected to a linkage slide rod (49), the bottom of which is fixedly connected to a control round block (410), and the surface of the connecting slide rod (27) is fixedly connected to a linkage push plate (411).

6. The step-by-step carbon precipitation device for praseodymium-neodymium chloride solution according to claim 5, characterized in that: The linkage push rod (43) is slidably connected to the inside of the linkage groove block (42), the control slide rod (46) penetrates and is slidably connected to the inside of the linkage groove block (42), one end of the return spring (47) is fixedly connected to the outer wall of the control slide rod (46), and the other end of the return spring (47) is fixedly connected to the outer wall of the linkage groove block (42), and the middle part of the inner wall of the control round block (410) is set as an inclined surface with the top end close to the control slide rod (46).

7. A process for the stepwise carbon deposition of praseodymium-neodymium chloride solution, applied to a stepwise carbon deposition device of praseodymium-neodymium chloride solution as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: injecting the praseodymium-neodymium chloride solution into the interior of the precipitation tank (1) through the drain pipe (12), and adjusting the pH value of the praseodymium-neodymium chloride solution; Step 2: adding the precipitant in the liquid storage tank (31) into the precipitation tank (1) in batches, and mixing it with the praseodymium-neodymium chloride solution to form a precipitate, which is deposited inside the receiving frame (41); Step 3: After the reaction between the praseodymium-neodymium chloride solution and the precipitant is completed, the remaining liquid in the precipitation tank (1) is discharged through the drain pipe (12); Step 4: Washing water is injected into the sedimentation tank (1) through the water pipe (211) and the stirring rod (21) to wash the inner wall of the sedimentation tank (1) and the sediment in the receiving frame (41). After washing, the sediment is discharged through the discharge pipe (13) to enter the subsequent steps.

8. The step-by-step carbon precipitation process of praseodymium-neodymium chloride solution according to claim 7 is characterized in that: In the second step, the precipitant is directly injected into the praseodymium-neodymium chloride solution through the liquid injection pipe (22) provided on the stirring rod (21), and the praseodymium-neodymium chloride solution and the precipitant are uniformly mixed in coordination with the rotation of the stirring rod (21).

9. The step-by-step carbon precipitation process of praseodymium-neodymium chloride solution according to claim 7, characterized in that: In step 4, the washing water and the precipitant inside the stirring rod (21) are switched by sliding the switching through pipe (25), thereby washing the inner wall of the sedimentation tank (1), and during the washing process, the liquid inside the sedimentation tank (1) is discharged from the gaps in the sediment by rotating the receiving frame (41).

Images