A processing device for iridium-containing metal scrap

Abstract

The present application relates to the technical field of noble metal recovery, and particularly relates to a device for processing iridium-containing metal waste. The specific technical scheme is as follows: a processing box is provided, and a descaling mechanism and a stripping mechanism are sequentially arranged in the processing box. The stripping mechanism comprises a rolling assembly and a scraping assembly which are sequentially arranged in the processing box. The rolling assembly comprises one fixed roller and two movable rollers which form a triangular support structure. The fixed roller is arranged below the two movable rollers and below the movable roller adjacent to the scraping assembly. The movable roller above the fixed roller is adjusted up and down by an adjusting assembly to adjust the distance between the movable roller and the fixed roller. The other movable roller is adjusted laterally by the adjusting assembly arranged laterally to adjust the distance between the movable roller and the movable roller adjacent to the other movable roller. A plurality of protrusions are arranged on the fixed roller and the movable rollers. The present application solves the problems of poor pertinence and excessive crushing of the substrate when the existing mechanical equipment processes the catalytic net.

Description

Technical Field

[0001] This invention relates to the field of precious metal recycling technology, specifically to a processing device for iridium-containing metal waste. Background Technology

[0002] Iridium, as a precious metal, possesses extremely high catalytic activity, high-temperature resistance, and chemical stability. Iridium catalytic meshes (such as platinum-iridium alloy catalytic meshes) are widely used in electrolytic catalytic reactions in industries such as chlor-alkali and nitric acid production. These iridium catalytic meshes use a metal wire mesh as a substrate, with iridium or platinum-iridium alloys attached to the substrate surface through electroplating, thermal spraying, or other methods to form a uniform catalytic active layer. However, after prolonged use, the catalytic mesh will fail due to surface scaling, wear of the active layer, and wire mesh deformation, resulting in a large amount of waste iridium catalytic mesh.

[0003] The core structural characteristics of waste iridium catalyst mesh are as follows: iridium (or platinum-iridium alloy) is attached to the surface of a metal substrate (mostly titanium or nickel mesh) in the form of a thin film or particles. The substrate has a regular mesh structure. There is no chemical fusion between the iridium and the substrate; it is only physically attached and mechanically interlocked. The waste material has a uniform shape (all are mesh sheets or rolls) without complex encapsulation structures. Only a small amount of reaction product scale (such as salts and oxides) may adhere to the surface. This structural characteristic determines that its recycling and treatment do not require complex chemical dissociation or high-temperature treatment. The separation of the iridium active layer from the metal substrate can be achieved through purely mechanical means, while preserving the integrity of the iridium particles to the greatest extent.

[0004] However, existing waste iridium catalytic mesh recycling technologies have significant drawbacks and are difficult to adapt to the needs of purely mechanical, high-efficiency processing:

[0005] Traditional recycling technologies are complex and rely on chemical aids: existing technologies mostly use a "chemical dissolution-filtration-purification" process, which dissolves the iridium active layer with strong acids such as aqua regia and then recovers iridium through chemical precipitation. This method not only has environmental problems such as strong acid corrosion and waste liquid pollution, but also causes some iridium to be contaminated by base metal impurities, reducing the recovery rate. At the same time, the chemical treatment process is long and costly, and is not suitable for batch processing.

[0006] Existing mechanical processing equipment is poorly targeted and has poor separation effect: Conventional metal waste processing equipment (such as crushers and grinders) is designed for blocky and granular waste. When used to process waste iridium catalyst mesh, it is easy to cause excessive crushing of the metal substrate, and the iridium particles are mixed with the substrate debris, making them difficult to separate. Moreover, it lacks a special "stripping-screening" synergistic mechanism, which cannot efficiently strip the iridium particles attached to the mesh substrate, resulting in a low iridium recovery rate.

[0007] The process is cumbersome and labor-intensive: Existing mechanical processing relies heavily on manual assistance, peeling off iridium particles by scraping and tapping. This is not only labor-intensive and inefficient, but also poses safety hazards such as iridium particles splashing and being lost, and operators inhaling iridium dust. At the same time, manual peeling cannot guarantee uniform peeling force, which can easily lead to some iridium particles remaining on the substrate surface, resulting in serious waste of resources.

[0008] In summary, given the characteristics of waste iridium catalyst mesh—namely, "physical adhesion of the iridium layer, mesh structure of the substrate, and uniform morphology"—there is an urgent need for a new processing device for iridium-containing metal waste. This device should achieve efficient separation of the iridium active layer from the metal substrate through an integrated design of "descaling-stripping-screening-separation," thereby improving iridium recovery rate and processing efficiency, and avoiding the environmental and safety issues associated with chemical treatment. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides an iridium-containing metal waste processing device, which solves the problems of poor targeting and excessive substrate breakage when existing mechanical equipment processes catalytic mesh.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] This invention discloses a processing device for iridium-containing metal waste, including a processing box. A descaling mechanism and a stripping mechanism are sequentially arranged inside the processing box. The stripping mechanism includes a rolling assembly and a scraping assembly sequentially arranged inside the processing box. The rolling assembly includes a fixed roller and two movable rollers forming a triangular support structure. The fixed roller is positioned below the two movable rollers and closer to the movable roller of the scraping assembly. The movable roller above the fixed roller has its distance from the fixed roller adjusted vertically by an adjusting assembly. The other movable roller has its distance from the adjacent movable roller adjusted horizontally by a horizontally arranged adjusting assembly. The fixed roller and the movable rollers are provided with several protrusions.

[0012] Preferably, the scraping assembly includes a movable scraping roller and a fixed scraping roller arranged vertically, and the movable scraping roller and the fixed scraping roller are respectively provided with stainless steel wire brushes, and the fixed scraping roller is on the same plane as the fixed roller.

[0013] Preferably, a sorting mechanism is provided on the side of the scraping assembly. The sorting mechanism includes a chain plate conveying mechanism arranged vertically. The lower chain plate conveying mechanism is arranged horizontally and on the same plane as the fixed roller. The upper chain plate conveying mechanism is arranged at an angle, and the end of the chain plate conveying mechanism with the maximum distance from the lower chain plate conveying mechanism faces the scraping assembly.

[0014] Preferably, the inner belt ring of the inclined chain conveyor is provided with a tensioning mechanism. The tensioning mechanism includes a support plate that is horizontally fixed to the inner wall of the processing box. A first telescopic member is provided at the bottom of the support plate. A guide plate is horizontally provided at the output end of the first telescopic member. Multiple guide rollers are arranged side by side and rotatably on the guide plate. The guide rollers face the lower surface of the inner belt ring of the chain conveyor.

[0015] Preferably, the motion directions between the two movable rollers, between the vertically corresponding movable rollers and fixed rollers, between the fixed scraping roller and the movable scraping roller, and between the two chain conveyor mechanisms are opposite and move towards each other; the motion directions of the movable roller, movable scraping roller, and inclined chain conveyor mechanism located above the fixed roller are the same; the rotation directions of the other movable roller, fixed roller, fixed scraping roller, and horizontally arranged chain conveyor mechanism are the same.

[0016] Preferably, a guide mechanism is provided below the two movable rollers. The guide mechanism includes a guide roller, and connecting plates are fixedly sleeved on the shafts at both ends of the guide roller. The two connecting plates are respectively inserted into grooves opened along the length of the fixed plates. Corresponding surfaces of the two fixed plates are provided with strip-shaped holes communicating with the grooves along their length. A connecting strip passing through the strip-shaped holes is provided between the two connecting plates extending into the grooves. A connecting block is provided between the two fixed plates. A second telescopic member is provided in the middle of the connecting block. The driving end of the second telescopic member is fixed to the middle of the connecting strip. A shaft is provided through and fixedly installed at the axis of the connecting block. A first motor is provided at one end of the shaft.

[0017] Preferably, a guide plate is provided below the stripping mechanism, a collection box is provided below the guide plate, a vibrator is provided at the bottom of the guide plate, a guide platform is provided through the side wall of the processing box, one end of the guide platform inside the processing box corresponds to the tail end of the horizontally arranged chain conveyor mechanism, and the height is lower than or equal to the surface of the horizontally arranged chain conveyor mechanism. The guide platform is inclined downward from inside the processing box toward outside the processing box, and a collection basket is provided below the end of the guide platform outside the processing box.

[0018] Preferably, the descaling mechanism includes descaling conveyors arranged horizontally at different heights. The length of the lower descaling conveyor is greater than that of the upper descaling conveyor. The outer surface of the descaling conveyor is provided with bristles. The two descaling conveyors move towards each other. The inner wall of the processing box is provided with comb teeth that are respectively inserted into the bristles of the two descaling conveyors. An inclined plate is provided below the descaling conveyor, and the lowest point of the inclined plate is located above the drawer.

[0019] Preferably, the tail end of the descaling conveyor is provided with a guide plate that slopes downward toward the rolling assembly. The lowest end of the guide plate is provided with a fixed roller shaft and a moving roller shaft. The fixed roller shaft is flush with the inclined surface of the guide plate. The moving roller shaft is driven by a second motor. The fixed roller shaft and the moving roller shaft are located above two movable rollers. A limit plate is provided above the lowest end of the guide plate. The distance between the limit plate and the guide plate gradually decreases and then gradually increases.

[0020] Preferably, the inner wall of the treatment box is provided with corresponding and transverse mounting holes, which correspond to the area between the two descaling conveyors. An electric slide is provided in the mounting hole, and finger cylinders are respectively provided on the sliders of the two electric slides. The two fingers of the finger cylinders are vertically aligned, and clamps are respectively provided between the two fingers of the finger cylinders. The other end of the clamps is fixed to the finger of the other finger cylinder. Under the action of the electric slide, the finger cylinders move back and forth between the two descaling conveyors with the clamps.

[0021] The present invention has the following beneficial effects:

[0022] 1. This invention is designed specifically for the characteristics of waste iridium catalyst mesh, such as "mesh-like perforation, physical adhesion of iridium layer, and easy deformation". It is not suitable for other iridium-containing waste materials (such as block catalysts, iridium alloy fragments, etc.). It solves the environmental pollution and safety hazards caused by traditional chemical treatment processes. It achieves the separation of iridium layer from substrate through a purely mechanical structure, without the need for chemical reagents, and is energy-saving and environmentally friendly.

[0023] 2. The rolling assembly disclosed in this invention adopts a triangular support and adjustable roller spacing structure. The protrusion is designed as a cone with a rounded top transition, which can peel off the iridium layer on the surface of the mesh substrate through extrusion and friction without damaging the integrity of the mesh structure and avoiding excessive breakage of the substrate. At the same time, the scraping assembly uses a stainless steel wire brush, which can reach deep into the corners of the mesh to clean the residual iridium layer. Finally, the finishing mechanism adopts a chain plate conveyor combined with tension and extrusion design, which can be used to repair the deformation problem after the catalytic mesh is peeled off.

[0024] 3. The descaling mechanism used in this invention combines descaling conveying with a comb-like structure to perform flexible friction descaling of salt and oxide scale on the surface of the catalytic mesh, thereby reducing the impurity content in the stripped iridium layer.

[0025] 4. Using the device of the present invention, the catalytic mesh achieves a 90° rotation in the triangular structure of the double movable roller and the fixed roller, and uses deformation to assist the iridium layer to fall off; the movable scraping roller and the fixed scraping roller effectively scrape the catalytic mesh, effectively solving the problems of poor targeting and easy excessive breakage of the substrate in existing mechanical equipment, and can efficiently peel off the iridium active layer without damaging the integrity of the substrate.

[0026] 5. This invention achieves deep separation of the iridium layer from the substrate through a three-stage peeling process: extrusion by the rolling assembly, catalytic mesh deflection and deformation, and scraping by a wire brush. The iridium layer peeling rate can reach over 94%. Specifically, the disordered or misaligned distribution of protrusions on the moving and fixed rollers avoids directional damage to the mesh substrate while enhancing contact friction with the iridium layer. The guiding mechanism drives the catalytic mesh to deflect, utilizing the tension generated by substrate deformation to break the bond between the iridium layer and the substrate, thus assisting in the iridium layer detachment. A high-density stainless steel wire brush penetrates deep into the mesh to clean residual iridium layer, solving the problem of "iridium layer residue at mesh corners" in traditional mechanical processing.

[0027] 6. This invention achieves complete recycling of the substrate and realizes resource recycling. The entire process avoids excessive substrate breakage. After being shaped by the sorting mechanism, the deformation rate of the stripped catalyst mesh substrate is less than 5%, and more than 90% can be directly used for re-plating an iridium layer. At the same time, the adjustable roller spacing and chain tension can be adapted to catalyst meshes of different thicknesses, avoiding substrate deformation caused by rigid extrusion. Compared with the problem of traditional mechanical substrate disposal, this invention significantly improves resource utilization. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention (with one side plate of the processing box removed).

[0029] Figure 2 for Figure 1 View from AA direction;

[0030] Figure 3 A schematic diagram of the guiding mechanism (viewed from below);

[0031] Figure 4 This is a schematic diagram of the tensioning mechanism.

[0032] Figure 5 To adjust the front view of the component;

[0033] Figure 6 for Figure 5 A BB-oriented view (with the shaft and motor added).

[0034] Figure 7 This is a schematic diagram of the corrective component structure;

[0035] In the diagram: 1. Processing box; 2. Fixed roller; 3. Movable roller; 4. Movable scraping roller; 5. Fixed scraping roller; 6. Chain conveyor mechanism; 7. Support plate; 8. First telescopic component; 9. Guide plate; 10. Guide roller; 11. Connecting plate; 12. Fixed plate; 13. Strip hole; 14. Connecting strip; 15. Connecting block; 16. Second telescopic component; 17. First motor; 18. Guide plate; 19. Collection box; 20. Vibrator; 21. Guide table; 22. Collection basket; 23. Descaling conveyor; 24. Brush bristles; 25. Comb teeth; 26. Inclined plate; 27. Drawer; 28. Guide plate; 29. ​​Fixed roller shaft; 3. 0. Moving roller shaft 31. Second motor 32. Limiting plate 33. Mounting hole 34. Electric slide table 35. Finger cylinder 36. Clamping plate 37. Support frame 38. Through hole 39. First straightening roller 40. Second straightening roller 41. Baffle 42. Annular groove 43. Limiting rod 44. Third motor 45. Feeding plate 46. Support platform 47. Fixed block 48. Adjusting hole 49. Moving block 50. Guide post 51. Groove 52. Screw 53. Nut 54. Driven bevel gear 55. Driven bevel gear 56. Rotating rod 57. Handle 58. Slide rail 59. Cover plate 60. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Unless otherwise specified, the technical means used in the implementation examples are conventional means well known to those skilled in the art.

[0038] refer to Figures 1-7 This invention discloses a processing device for iridium-containing metal waste. It primarily targets the mesh structure and physical adhesion characteristics of the iridium layer in waste iridium catalyst meshes to achieve effective separation of the iridium active layer from the metal substrate. Therefore, this invention aims to initially peel the iridium active layer from the metal substrate. The peeled iridium-containing catalyst mixture undergoes further impurity removal and separation, and is finally processed into a corresponding product, such as chloroiridium acid, as needed. It is evident that the processing device disclosed in this invention pertains to the pretreatment (i.e., peeling) of the waste iridium catalyst mesh, and does not include further processing of the peeled iridium active layer.

[0039] The processing device disclosed in this invention includes a processing box 1, in which a descaling mechanism and a stripping mechanism are arranged sequentially. The descaling mechanism includes descaling conveyors 24 arranged horizontally at different heights. The length of the lower descaling conveyor 24 is greater than that of the upper descaling conveyor 24. The outer surface of the descaling conveyor 24 is provided with bristles 25. The two descaling conveyors 24 move towards each other. The inner wall of the processing box 1 is provided with comb teeth 26 that are respectively inserted into the bristles 25 of the two descaling conveyors 24. In order to save space, an inclined plate 27 is inclinedly arranged below the descaling conveyor 24. The lowest point of the inclined plate 27 is located above the drawer 28, so that impurities enter the drawer through the inclined plate for collection, which is convenient for regular cleaning. At the same time, an observation window can be provided on the side wall of the processing box to observe the impurities in the drawer in real time. It should be noted that the basic structure of the descaling conveyor is a belt conveyor mechanism, which is existing technology. In this invention, bristles are added to the outer surface of the conveyor belt, or a fixed belt with bristles is bonded to the outer ring of the conveyor belt, depending on the requirements. When the two descaling conveyors move towards each other, the catalytic screen is placed between them. The bristles rub the upper and lower surfaces of the catalytic screen to remove the attached salts and oxide scale. The scale falls into drawer 28, and the descaled catalytic screen enters the stripping mechanism (i.e., the crushing assembly) via guide plate 29. In this invention, the drawer has a drawer-type structure, with one end extending out of the processing box and the other end placed inside the processing box on an L-shaped support frame 38. In one embodiment, both ends of the support frame 38 and the opening facing the processing box for the drawer to extend from are fixed to the inner wall of the processing box 1. The end of the drawer inside the processing box contacts the vertical plate of the support frame. The two ends of the inclined plate are fixed to the inner wall of the treatment box, and the top of the support frame vertical plate can be fixed to the bottom of the inclined plate to increase the stability of the inclined plate. At the same time, it also prevents impurities (such as detached salts, oxide scale, etc.) from falling into the bottom of the treatment box through the gap between the support frame and the treatment box.

[0040] Furthermore, the bristles can be made of nylon, with a bristle diameter of 0.2 mm and a density of 300 bristles / cm². 2 The descaling conveyor is driven by a motor. The roller of the descaling conveyor extends out of the processing box and is fixed to the motor, which is located on the outer wall of the processing box. The roller is fixed to the processing box by bearings. Because the bristles have a certain degree of flexibility, the spacing between the two descaling conveyors is set so that the bristles on the two conveyors just touch. Therefore, when the catalytic mesh passes between the two descaling conveyors, it can make better contact with the bristles on the upper and lower surfaces. Also, due to the deformability of the bristles, it can accommodate catalytic meshes of different thicknesses.

[0041] Furthermore, the comb teeth include a shaft and teeth. The two ends of the shaft are fixed to the corresponding side walls of the processing box, aligned with the width direction of the descaling conveyor. The teeth are evenly distributed on the shaft along its axial direction, with the ends extending into the bristles. Preferably, the length of the teeth extending into the bristles is 1 / 3 to 3 / 5 of the bristle length, which not only combs the bristles but also removes impurities that fall into them. In one embodiment, the comb teeth are located in the middle of the tail end of the upper descaling conveyor; in the lower descaling conveyor, the comb teeth are located at the bottom of the outer ring of the descaling conveyor and above the inclined plate 27, ensuring that the combed impurities fall onto the inclined plate and are collected in the drawer. A more preferred solution is to prevent impurities from scattering everywhere under the action of the comb teeth on the upper descaling conveyor. The length of the upper descaling conveyor is shorter than that of the lower descaling conveyor, so that the impurities combed off by the upper descaling conveyor fall onto the lower descaling conveyor. Finally, under the action of gravity and through the comb teeth at the bottom of the lower descaling conveyor, the impurities are combed onto the inclined plate.

[0042] Furthermore, to avoid the sheet-shaped catalytic mesh from shifting during feeding, resulting in the edges not being descaled or peeled off, leaving a large amount of iridium active layer residue; and to prevent the rolled catalytic mesh from being laid flat on the descaling conveyor due to uneven tension during feeding, so as to avoid the large amount of iridium active layer residue remaining; A straightening assembly is provided at the starting end of the descaling conveyor. Preferably, the straightening assembly is located in a through hole 39 opened in the side wall of the treatment box corresponding to the starting end of the descaling conveyor. The straightening assembly includes a first straightening roller 40 and a second straightening roller 41 arranged vertically. The shafts at both ends of the two straightening rollers are fixed to the inner side wall of the through hole by bearings. One end of each of the two straightening rollers passes through the treatment box 1 and is connected to a third motor 45. The third motor controls the two straightening rollers to move towards each other (it should be understood that the first straightening roller moves counterclockwise and the second straightening roller moves clockwise). The gap between the first and second straightening rollers corresponds to the gap between the two descaling conveyors, so that the catalytic mesh passes through the two straightening rollers and enters between the two descaling conveyors, ensuring that the catalytic mesh enters the descaling conveyor in a horizontal direction to perform the descaling operation. To prevent the rolled or sheet-like catalytic mesh from shifting between the two straightening rollers or even getting tangled on the shafts at both ends of the straightening rollers, annular baffles 42 are fixedly fitted onto the shafts at both ends of the second straightening roller (located at the bottom). The outer diameter of the baffles is larger than the outer diameter of the second straightening roller and partially overlaps with the edge of the first straightening roller, forming a retaining edge at both ends of the second straightening roller. This also seals the two ends of the gap between the two straightening rollers, preventing the edge of the catalytic mesh from shifting and preventing the catalytic mesh from running off-center from the top of the baffle. This ensures that the catalytic mesh maintains a stable posture when fed, and that both the edge and the middle part can make uniform contact with the two straightening rollers, thereby allowing the catalytic mesh to be smoothly conveyed to the descaling conveyor.

[0043] Further preferably, to accommodate catalyst meshes of different sizes, the first straightening roller 40 has multiple annular grooves 43 arranged circumferentially along its axial direction. These annular grooves 43 are respectively located near both ends of the first straightening roller 40, with the catalyst mesh passing through the middle area. The second straightening roller 41 has multiple limiting rods 44 threadedly fixed circumferentially. These limiting rods are perpendicular to the second straightening roller and correspond to the annular grooves. When it is necessary to adjust the spacing of the catalyst mesh in the width direction, only the limiting rods need to be installed at the corresponding positions on the second straightening roller. Figure 7 The image shows the setup with all the limiting rods installed. In actual use, the limiting rods are installed at the corresponding positions according to the required width. Preferably, the limiting rods extend into the annular groove on the corresponding first straightening roller to prevent the catalytic mesh from entering the gap between the limiting rod and the first straightening roller. Simultaneously, the outer diameter of the limiting rod is smaller than the width of the annular groove to prevent friction within the groove as the limiting rod rotates with the second straightening roller. By setting up the straightening assembly and limiting rods, the catalytic mesh is confined within a certain area, and the two straightening rollers compress and flatten the mesh, ensuring its flatness to a certain extent and preventing curling, folding, or large-angle warping, which would affect the descaling and peeling effects.

[0044] Furthermore, a feed plate 46 is provided on the outer wall of the processing box 1. The surface of the feed plate is flush with the second straightening roller 41, so that the catalytic mesh can smoothly enter between the two straightening rollers and be squeezed and straightened to ensure its flatness to a certain extent.

[0045] Furthermore, in order to better utilize the brush bristles to descale the catalytic mesh, and at the same time to avoid excessive friction caused by the brush bristles on the catalytic mesh, which would prevent the descaling conveyor from transporting the catalytic mesh to its tail end and causing it to fall onto the guide plate 29, mounting holes 34 are correspondingly and horizontally arranged on the inner wall of the processing box 1. The mounting holes 34 correspond to the area between the two descaling conveyors 24 and are aligned with the length direction of the descaling conveyors. An electric slide table 35 is installed in the mounting hole 34, and finger cylinders 36 are respectively installed on the sliders of the two electric slide tables 35. The two fingers of the finger cylinders 36 are vertically aligned, and clamping plates 37 are respectively installed between the two fingers of the finger cylinders 36. The other end of the clamping plate 37 is fixed to the finger of the other finger cylinder 36. Under the action of the electric slide table 35, the finger cylinder 36 moves back and forth between the two descaling conveyors 24 with the clamping plate 37. That is, the clamping plate clamps one end of the catalytic mesh and moves between the descaling conveyors under the action of the electric slide table. It should be noted that the mounting holes are designed to avoid the electric slides occupying space within the processing tank, ensuring that the width of the descaling conveyor is as compatible as possible with the width of the processing tank. Similarly, other mechanisms and components are designed with this in mind, such as the peeling mechanism, sorting mechanism, inclined plate, guide plate, material guide plate, and limiting plate. The ends of the inclined plate, guide plate, material guide plate, and limiting plate adjacent to the side wall of the processing tank are fixed to the inner side wall of the processing tank. The dimensions of each component in the peeling and sorting mechanisms are adapted to the width of the processing tank. In this invention, the finger cylinders on the two electric slides are correspondingly arranged, with the fingers of the finger cylinders positioned vertically and moving linearly. Two clamping plates connect the two fingers of the corresponding finger cylinders. When the two finger cylinders are activated simultaneously, the two clamping plates close, thereby clamping one side of the catalytic mesh. Then, the electric slide is simultaneously activated, driving the catalytic mesh into the space between the two descaling conveyors. Subsequently, the two descaling conveyors are activated, moving towards each other, coordinating with the electric slide to carry the catalytic mesh, allowing it to pass smoothly through the two conveyors. During this process, by controlling the operating speed of the electric slide and the rotation speed of the descaling conveyors, a speed difference is created, increasing the friction time of the brush bristles on the catalytic mesh and achieving a better descaling effect. Of course, the operating speed of the electric slide and the rotation speed of the descaling conveyors are set according to the operator's habits, and there is no optimal solution; therefore, their operating speed and rotation speed are not limited here. According to the correcting roller provided by this invention, after the catalytic mesh is corrected by the correcting roller, it gradually enters the area where the two clamps are located. The activation timing of the finger cylinder can be determined by setting a touch sensor. The touch sensor is set on the surface of one of the corresponding clamps, preferably in the middle position. When the catalytic mesh enters between the clamps, the touch sensor recognizes the signal. At this time, the finger cylinder can be activated manually or by a controller.For ease of operation, during the descaling stage, the electric slide, touch sensor, finger cylinder, and descaling conveyor are all connected to and controlled by the controller. The controller allows setting the rotation speed, running speed, and start-up timing of each component, which can be configured according to actual needs. When the catalytic screen reaches the end of the descaling conveyor, the finger cylinder activates to release its grip on the catalytic screen. At this point, under the action of the descaling conveyor, the catalytic screen enters the area of ​​the crushing assembly via the guide plate. Simultaneously, the fingers of the finger cylinder close, meaning the two clamps close. The electric slide then resets the finger cylinder and opens the two clamps, allowing the next round of operation to begin.

[0046] Furthermore, the peeling mechanism includes a rolling assembly and a scraping assembly arranged sequentially within the processing tank 1. The tail end of the descaling conveyor 24 is provided with a guide plate 29 that slopes downward toward the rolling assembly. The descaled catalytic mesh slides through the guide plate to the area of ​​the rolling assembly for rolling and peeling off the iridium layer. The rolling assembly includes a fixed roller 2 and two movable rollers 3 forming a triangular support structure. The fixed roller 2 is located below the two movable rollers 3 and below the movable roller 3 near the scraping assembly. The movable roller 3 located above the fixed roller 2 has its distance from the fixed roller 2 adjusted vertically by an adjusting assembly. The other movable roller 3 has its distance from the adjacent movable roller 3 adjusted horizontally by a horizontally arranged adjusting assembly. The fixed roller 2 and the movable roller 3 are provided with several protrusions. The protrusions are made of metal and are conical with a rounded top to enhance the peeling friction. As one option, the bottom diameter of the protrusion can be 0.3 cm, the height can be 0.4-0.5 cm, and the spacing can be 0.3-0.5 cm. It should be noted that adjusting the length and height of the two movable rollers allows for adjustment of the distance between them, as well as the distance between the fixed roller and the movable roller above it, thereby enabling the peeling of catalyst screens of different thicknesses. The two movable rollers are driven by a motor located outside the processing chamber. The protrusions in this invention are randomly or misaligned on the sidewalls of the movable and fixed rollers. These protrusions, through squeezing and friction, peel off the iridium active layer from the upper and lower surfaces of the catalyst screen. The peeled iridium layer falls into the collection box via a guide plate, while the metal substrate remains intact as it enters the scraping assembly.

[0047] Furthermore, to ensure the catalytic mesh smoothly enters between the two movable rollers 3 via the guide plate, a fixed roller shaft 30 and a movable roller shaft 31 are provided at the lowest end of the guide plate 29. The shafts at both ends of the fixed roller shaft 30 and the movable roller shaft 31 are fixed to the inner wall of the processing chamber by bearings. The fixed roller shaft 30 is flush with the inclined surface of the guide plate 29, or the surface of the fixed shaft is lower than the inclined surface of the guide plate. One end of the movable roller shaft 31 passes through the processing chamber and is connected to a second motor 32, which drives it to rotate counterclockwise. The fixed roller shaft can only rotate without power. The fixed roller shaft 30 and the movable roller shaft 31 are located above the two movable rollers 3. A limiting plate 33 is provided above the lowest end of the guide plate 29, and the distance between the limiting plate 33 and the guide plate 29 gradually decreases and then gradually increases. It should be noted that the fixed and moving rollers are designed to change the orientation of the catalytic mesh. Under the action of the moving roller, one end of the catalytic mesh moves downwards, entering between the two moving rollers for crushing and peeling. It then enters between the moving and fixed rollers, where the catalytic mesh undergoes a 90° turn, deforming and causing the loose or poorly bonded iridium layer to detach during the bending process. This is further crushed and peeled by the fixed roller, maximizing the removal of the iridium layer from the catalytic mesh. The limiting plate is primarily to prevent the catalytic mesh from bouncing over the moving roller after falling onto the guide plate, thus preventing it from entering the area between the two moving rollers. Therefore, the limiting plate restricts the catalytic mesh, allowing it to pass through the area between the limiting plate and the guide plate, and then enter between the two moving rollers in conjunction with the moving and fixed rollers. The variation in the distance between the limiting plate 33 and the guide plate 29 is mainly to prevent the catalytic mesh from falling onto the limiting plate.

[0048] Furthermore, to facilitate the movement of the catalytic mesh from between the two movable rollers to between the movable roller and the fixed roller, a guide mechanism is provided below the two movable rollers 3. This guide mechanism is inclined and faces the area of ​​the opening formed by the two movable rollers and the fixed roller, such as... Figure 1As shown, the guiding mechanism includes a guide roller 11. Connecting plates 12 are fixedly fitted onto the shafts at both ends of the guide roller 11. The two connecting plates face the same direction and are parallel to each other. The two connecting plates 12 are respectively inserted into grooves opened along the length of a fixed plate 13. That is, one end of the fixed plate has a groove along its length, and one end of the connecting plate is fitted onto the fixed plate through the groove with a clearance fit, so that the connecting plate can reciprocate within the groove. Corresponding surfaces of the two fixed plates 13 have strip-shaped holes 14 communicating with the grooves along their length. A connecting strip 15 is provided between the two connecting plates 12 extending into the grooves, passing through the strip-shaped holes 14. A connecting block 16 is provided between the two fixed plates 13. A second telescopic member 17 is provided in the middle of the connecting block 16. The driving end of the second telescopic member 17 is fixed to the middle of the connecting strip 15. A shaft is provided through and fixedly installed at the axis of the connecting block 16. A first motor 18 is provided at one end of the shaft. It should be noted that: the two ends of the shaft are fixed to the side walls of the processing box by bearings, while the two ends of the guide roller are separated from the processing box. One end of the shaft passes through the outside of the processing box and is connected to the first motor. The first motor can drive the guide roller to rotate within the range between the obliquely arranged movable roller and the fixed roller. The first telescopic component can drive the connecting strip and the connecting plate to move the guide roller along the strip hole, adjusting the distance between the guide roller and the movable roller above the fixed roller. Finally, the guiding mechanism enables the catalytic mesh moving down from the two movable rollers to move towards the area between the fixed roller and the movable roller, so that the catalytic mesh is crushed again and then enters the scraping assembly. The second telescopic component includes, but is not limited to, electric push rods and hydraulic push rods.

[0049] Furthermore, to prevent the iridium layer falling from the catalyst mesh due to the two movable rollers from accumulating on the second telescopic component and affecting its use, a cover plate 60 is installed between the two fixed plates. The cover plate is located above the second telescopic component. At the same time, the two fixed plates are also fixed and shielded by the cover plate at the end facing the guide roller.

[0050] Furthermore, the adjustment assembly includes a fixing block 48, on which an adjustment hole 49 is provided. Similarly, a hole of the same size and corresponding to the adjustment hole is also provided on the side wall of the processing box, so that the shafts at both ends of the movable roller and the movable scraping roller can extend out, while the fixing block is fixed on the outer wall of the processing box. The adjusting hole is rectangular, with a groove along its length. A moving block 50 is installed inside the strip-shaped hole. Guide posts 51 extending into the groove are provided on both sides of the moving block. A hole is provided through the center of the moving block along the width of the fixed block. A groove 52 is vertically provided at the bottom center of the adjusting hole 49. A screw 53 is installed in the groove 52. One end of the screw 53 extends out of the groove 52 and is fitted with a nut 54. The nut 54 is fixed to the bottom center of the moving block 50. A driven bevel gear 55 is provided at the end of the screw 53 located in the groove 52. A driving bevel gear 56 meshes with the driven bevel gear 55. A rotating rod 57 is provided at the center of the driving bevel gear 56. One end of the rotating rod 57 is fixed in the groove 52 by a bearing, and the other end extends out of the groove 52 and is provided with a handle 58. It should be noted that the hole where the rotating rod extends out of the groove can also be fixed by a bearing, thereby increasing the stability of the rotating plate. Meanwhile, the screw and the groove are fixed by bearings. When the handle is turned, the driving bevel gear 56 drives the driven bevel gear to rotate, which in turn causes the screw to rotate. The nut moves on the screw, thereby raising and lowering the moving block. Ultimately, this achieves the lateral movement of the movable roller connected to the adjusting component, the longitudinal movement of another movable roller, and the longitudinal movement of the movable scraper roller. It should be noted that since the overall position of the movable roller and the movable scraper roller is adjusted, the adjusting component is set at both ends of the shaft of the movable roller and the movable scraper roller. The shaft passes through the hole on the fixed block and is fixed by bearings. A motor is installed as needed. To increase the stability of the motor, slide rails 59 and matching sliders are set on both sides of the adjusting hole on the fixed block. The sliders are fixed to the motor. When the distance of the movable roller or the movable scraper roller is adjusted, the motor moves along the slide rails, which also increases the stability of the motor during operation.

[0051] Further preferably, a guide plate 19 is provided below the peeling mechanism, and a collection box 20 is provided below the guide plate 19. The collection box has a drawer-type structure, with one end extending out of the processing box for easy removal to collect the iridium-containing solid mixture. A vibrator 21 is provided at the bottom of the guide plate 19 to prevent iridium layer accumulation on the guide plate. Similarly, the iridium layer peeled off by the scraping assembly also falls into the collection box through the guide plate.

[0052] Furthermore, the scraping assembly includes a movable scraping roller 4 and a fixed scraping roller 5 arranged vertically. The movable scraping roller 4 and the fixed scraping roller 5 are each wrapped with a stainless steel wire brush (optionally, the brush bristles can have a diameter of 0.1 mm, a length of 0.5 cm, and a density of 500 bristles / cm). 2 To ensure effective scraping of residual iridium layer at the corners of the catalyst mesh, the fixed scraping roller 5 is positioned on the same plane as the fixed roller 2. It should be noted that the movable scraping roller 4 and the fixed scraping roller 5 are located above the guide plate, receiving the iridium layer peeled off by the scraping assembly. Similarly, the distance between the movable scraping roller and the fixed scraping roller is adjusted by the aforementioned adjusting assembly. The spacing between the stainless steel wire brushes on the movable and fixed scraping rollers is less than the thickness of the catalyst mesh, such as 0.1-0.2 cm less, forming a continuous peeling-scraping action in conjunction with the movable and fixed rollers.

[0053] Furthermore, since the substrate of the catalyst mesh is easily deformed after the iridium layer is peeled off, a shaping mechanism is provided beside the scraping assembly to reshape the final processed catalyst mesh. The shaping mechanism includes vertically arranged chain-plate conveyor mechanisms 6. The lower chain-plate conveyor mechanism 6 is horizontally positioned and on the same plane as the fixed roller 2, while the upper chain-plate conveyor mechanism 6 is inclined, with its maximum distance from the lower chain-plate conveyor mechanism 6 facing the scraping assembly. It should be noted that the upper chain-plate conveyor mechanism is inclined primarily because if the catalyst mesh deforms after being scraped by the scraping assembly, it cannot accurately enter between the two chain-plate conveyor mechanisms. Therefore, its inclined arrangement ensures that the catalyst mesh enters both chain-plate conveyor mechanisms. The chain-plate conveyor mechanism is existing technology and can be used directly.

[0054] Furthermore, to avoid adjusting the upper chain conveyor mechanism vertically, a tensioning mechanism can be provided in the inner ring of the inclined chain conveyor mechanism 6 to extrude and shape catalytic meshes of different thicknesses. The tensioning mechanism includes a support plate 7 horizontally fixed to the inner wall of the processing box 1, passing through the inner ring of the inclined chain conveyor mechanism. A first telescopic member 8 is provided at the bottom center of the support plate 7. A guide plate 9 is horizontally arranged at the output end of the first telescopic member 8. Multiple guide rollers 10 are arranged side-by-side and rotatably on the guide plate 9. The guide rollers are perpendicular to the width direction of the chain conveyor mechanism and arranged along its length direction, with the guide rollers 10 facing the lower surface of the inner ring of the chain conveyor mechanism 6. It should be noted that the first telescopic member includes, but is not limited to, electric push rods and hydraulic push rods. The chain conveyor mechanism is existing technology. When it is necessary to reduce the distance between the tail ends of the two chain conveyor mechanisms, the first telescopic component is activated, causing the guide roller to contact the lower surface of the inner ring of the chain plate of the chain conveyor mechanism and apply a certain force, causing it to move towards the chain plate of the lower chain conveyor mechanism, thereby reducing the distance between the guide roller and the lower chain plate of the two chain conveyor mechanisms, which can exert a certain amount of pressure on the catalytic screen. The rotatability of the guide roller reduces the friction between the chain plate and the guide roller when the chain conveyor mechanism moves. The number of guide rollers determines how long the upper and lower chain plates are parallel. At the same time, in order to increase the force on the lower chain plate, a support platform 47 is provided on the bottom surface of the inner ring of the lower chain conveyor mechanism. The two ends of the support platform 47 pass through the inner ring of the lower chain conveyor mechanism and are fixed to the inner wall of the processing box. The support platform and the guide roller are arranged vertically and vertically, thereby better pressing the catalytic screen. In addition, the cross-section of the guide plate can be U-shaped, and the guide roller is set in the groove of the guide plate and is rotatably connected by a shaft.

[0055] As an alternative implementation, the chain conveyor mechanism can be replaced with a pressure plate. The output end of a third telescopic component is fixed at the top center of the pressure plate and corresponds to the support platform. When the catalytic mesh enters between the pressure plate and the support platform, the third telescopic component is driven to press the catalytic mesh. However, this setup prevents the catalytic mesh from being transported outside the processing box; therefore, this method is only an option and can be used when the aforementioned problem does not exist. Alternatively, two smooth rollers positioned vertically can be used for shaping.

[0056] Furthermore, the motion directions between the two movable rollers 3, between the vertically corresponding movable rollers 3 and fixed rollers 2, between the fixed scraping roller 5 and movable scraping roller 4, and between the two chain-plate conveyor mechanisms 6 are opposite and move towards each other; the motion directions of the movable roller 3, movable scraping roller 4, and inclined chain-plate conveyor mechanism 6 located above the fixed roller 2 are the same; the rotation directions of the other movable roller 3, fixed roller 2, fixed scraping roller 5, and horizontally arranged chain-plate conveyor mechanism 6 are the same. It should be noted that the power-driven mechanisms disclosed in this invention are all driven by motors and are all located outside the processing box, not occupying the internal space of the processing box. Furthermore, whether to use a motor for individual drive, a synchronous belt pulley for drive, or a gear drive is determined according to actual needs and is a conventional operation in the art, and should not be construed as a situation that those skilled in the art cannot implement.

[0057] Furthermore, a guide platform 22 is provided through the side wall of the processing box 1, that is, the side wall of the processing box is provided with a hole for the guide platform to pass through, without affecting the passage of the catalytic mesh. One end of the guide platform 22 located inside the processing box 1 corresponds to the tail end of the horizontally arranged chain plate conveying mechanism 6, and its height is lower than or equal to the surface of the horizontally arranged chain plate conveying mechanism 6. The guide platform 22 is inclined downward from inside the processing box 1 toward outside the processing box 1. A collection basket 23 is provided below the end of the guide platform 22 located outside the processing box 1, so that the shaped catalytic mesh falls onto the guide platform and slides into the collection basket.

[0058] The device disclosed in this invention is suitable for conventional catalytic meshes with titanium or nickel mesh as the substrate, such as narrow (20-50cm) and wide (60-80cm) catalytic meshes commonly used in industry. There is no length limitation. It can process sheet-shaped (single sheet size ≤80cm×100cm) or roll-shaped (roll diameter ≤30cm) catalytic meshes. Roll-shaped catalytic meshes can be gradually unfolded into the device with manual assistance. If the size exceeds the above range, it needs to be manually cut or split before processing. Otherwise, it is easy to cause problems such as feeding jamming and incomplete peeling.

[0059] When using this invention, the catalytic mesh is placed on the feed plate and pushed between the first and second straightening rollers. As the two straightening rollers rotate in opposite directions, the catalytic mesh is flattened. As the catalytic mesh enters the processing box, the finger cylinders are activated, the clamping plate holds one end of the catalytic mesh, and the electric slide is activated, moving the two finger cylinders toward the descaling conveyor. The descaling conveyor is activated, crushing and rubbing the catalytic mesh until the finger cylinders bring the catalytic mesh to the tail end of the descaling conveyor below. At this time, the finger cylinders release the fixation of the catalytic mesh, and under the action of the descaling conveyor, the catalytic mesh falls onto the guide plate and slides between the fixed roller shaft and the moving roller shaft. Under the action of the moving roller shaft (activated state), one end of the catalytic mesh moves downward and enters between the two moving rollers (activated state) for crushing and peeling. Subsequently, under the action of the guide roller, the catalytic mesh enters between the moving roller and the fixed roller (activated state). During the bending process, the iridium layer is better peeled off. Subsequently, the catalytic mesh enters between the movable scraping roller and the fixed scraping roller (in the activated state) for scraping, which enhances the peeling of the iridium layer. Finally, the catalytic mesh enters the chain conveyor mechanism for shaping to prevent severe deformation, and is then collected into the collection basket by the guide table.

[0060] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "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, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0061] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A processing device for iridium-containing metal waste, comprising a processing tank (1), characterized in that: The processing box (1) is provided with a descaling mechanism and a stripping mechanism in sequence. The stripping mechanism includes a rolling component and a scraping component arranged in sequence in the processing box (1). The rolling component includes a fixed roller (2) and two movable rollers (3) forming a triangular support structure. The fixed roller (2) is located below the two movable rollers (3) and below the movable roller (3) close to the scraping component. The movable roller (3) located above the fixed roller (2) adjusts the distance between itself and the fixed roller (2) by adjusting the height of the adjustment component. The other movable roller (3) adjusts the distance between itself and the adjacent movable roller (3) by adjusting the horizontally arranged adjustment component. The fixed roller (2) and the movable roller (3) are provided with several protrusions. A guide mechanism is provided below the two movable rollers (3). The guide mechanism includes a guide roller (11). A connecting plate (12) is fixedly sleeved on the shaft at both ends of the guide roller (11). The two connecting plates (12) are respectively inserted into the grooves opened along the length of the fixed plate (13). The corresponding plate surfaces of the two fixed plates (13) are provided with strip holes (14) communicating with the grooves along their length. A connecting strip (15) passing through the strip hole (14) is provided between the two connecting plates (12) extending into the groove. A connecting block (16) is provided between the two fixed plates (13). A second telescopic member (17) is provided in the middle of the connecting block (16). The driving end of the second telescopic member (17) is fixed to the middle of the connecting strip (15). A shaft is provided through and fixed at the axis of the connecting block (16). A first motor (18) is provided at one end of the shaft. The descaling mechanism includes descaling conveyors (24) arranged horizontally at the top and bottom. The length of the lower descaling conveyor (24) is greater than that of the upper descaling conveyor (24). The outer surface of the descaling conveyor (24) is provided with bristles (25). The two descaling conveyors (24) move towards each other. The inner wall of the processing box (1) is provided with comb teeth (26) that are respectively inserted into the bristles (25) of the two descaling conveyors (24). An inclined plate (27) is inclined below the descaling conveyor (24). The lowest point of the inclined plate (27) is located above the drawer (28). The tail end of the descaling conveyor (24) is provided with a guide plate (29) that is inclined downward toward the rolling assembly. The lowest end of the guide plate (29) is provided with a fixed roller shaft (30) and a moving roller shaft (31). The fixed roller shaft (30) is flush with the inclined surface of the guide plate (29). The moving roller shaft (31) is driven by a second motor (32). The fixed roller shaft (30) and the moving roller shaft (31) are located above the two moving rollers (3). A limit plate (33) is provided above the lowest end of the guide plate (29). The distance between the limit plate (33) and the guide plate (29) gradually decreases and gradually increases.

2. The iridium-containing metal waste processing device according to claim 1, characterized in that: The scraping assembly includes a movable scraping roller (4) and a fixed scraping roller (5) arranged vertically. The movable scraping roller (4) and the fixed scraping roller (5) are respectively equipped with stainless steel wire brushes. The fixed scraping roller (5) and the fixed roller (2) are on the same plane.

3. The iridium-containing metal waste processing apparatus according to claim 1 or 2, characterized in that: A sorting mechanism is provided on the side of the scraping assembly. The sorting mechanism includes a chain plate conveying mechanism (6) arranged vertically. The lower chain plate conveying mechanism (6) is arranged horizontally and is on the same plane as the fixed roller (2). The upper chain plate conveying mechanism (6) is arranged at an angle, and the maximum distance between it and the lower chain plate conveying mechanism (6) is towards the scraping assembly.

4. The iridium-containing metal waste processing device according to claim 3, characterized in that: A tensioning mechanism is provided in the inner belt ring of the inclined chain conveyor mechanism (6). The tensioning mechanism includes a support plate (7) that is horizontally fixed on the inner wall of the processing box (1). A first telescopic member (8) is provided at the bottom of the support plate (7). A guide plate (9) is horizontally provided at the output end of the first telescopic member (8). A plurality of guide rollers (10) are arranged side by side and rotated on the guide plate (9). The guide rollers (10) face the lower surface of the inner belt ring of the chain conveyor mechanism (6).

5. The iridium-containing metal waste processing device according to claim 3, characterized in that: The two movable rollers (3), the movable rollers (3) and fixed rollers (2) arranged vertically, the fixed scraper rollers (5) and movable scraper rollers (4), and the two chain conveyor mechanisms (6) move in opposite directions and towards each other; the movable rollers (3), movable scraper rollers (4), and inclined chain conveyor mechanisms (6) located above the fixed rollers (2) move in the same direction; the other movable rollers (3), fixed rollers (2), fixed scraper rollers (5), and horizontally arranged chain conveyor mechanisms (6) rotate in the same direction.

6. The iridium-containing metal waste processing device according to claim 3, characterized in that: A guide plate (19) is provided below the stripping mechanism, and a collection box (20) is provided below the guide plate (19). A vibrator (21) is provided at the bottom of the guide plate (19). A guide platform (22) is provided through the side wall of the processing box (1). One end of the guide platform (22) inside the processing box (1) corresponds to the tail end of the horizontally arranged chain plate conveying mechanism (6), and its height is lower than or equal to the surface of the horizontally arranged chain plate conveying mechanism (6). The guide platform (22) is inclined downward from inside the processing box (1) toward outside the processing box (1). A collection basket (23) is provided below the end of the guide platform (22) outside the processing box (1).

7. The iridium-containing metal waste processing apparatus according to claim 1, characterized in that: The inner wall of the treatment box (1) is provided with corresponding and transverse mounting holes (34). The mounting holes (34) correspond to the area between the two descaling conveyors (24). An electric slide (35) is provided in the mounting holes (34). Finger cylinders (36) are respectively provided on the sliders of the two electric slides (35). The two fingers of the finger cylinder (36) are vertically aligned. A clamp (37) is provided between the two fingers of the finger cylinder (36). The other end of the clamp (37) is fixed to the finger of the other finger cylinder (36). Under the action of the electric slide (35), the finger cylinder (36) moves back and forth between the two descaling conveyors (24) with the clamp (37).

Images