Grinding device based on palladium carbon recovery

Abstract

The grinding device comprises a roller arranged on a machine table, the roller is in transmission connection with a roller driving assembly, the roller is used for material grinding, one end of the roller is provided with a feeding port and an air inlet, the other end of the roller is provided with a discharging pipe, and airflow is formed between the air inlet and the discharging pipe; dust generated in the grinding process is conveyed to the discharging pipe through airflow; a filter screen is arranged in the discharging pipe and used for preventing particle materials except the dust from leaking outwards. In the grinding process, by controlling the air flow intensity and the filter screen, effective materials with large weight can be reserved, generated powder with small weight is brought out through air flow, it is avoided that the powder is left in the roller to block material holes, the porosity of the finally produced materials is guaranteed, the leaching reaction efficiency of palladium metal in the materials is guaranteed, and the recovery efficiency is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of metal material recycling technology, and in particular to a grinding device based on palladium-carbon recycling. Background Technology

[0002] In the process of recovering waste palladium on carbon catalyst, the catalyst particles need to be crushed. Then, the crushed powder is mixed with acidic liquids such as aqua regia for leaching to obtain a palladium solution. After purifying the palladium solution to remove impurities, the palladium ions in the palladium solution are reduced to sponge palladium. Finally, it is refined to obtain metallic palladium, thus completing the entire extraction process.

[0003] The purpose of grinding catalyst particles is to expose the palladium encapsulated within the material, increasing the contact area between the material and the acidic liquid. However, existing grinding devices are designed to reduce material volume without considering the exposure of internal components. The grinding process generates a large amount of fine dust. While the initial grinding action increases the material's porosity, the fine dust particles produced may clog these pores, contradicting the purpose of exposing the palladium. This prevents palladium metal from effectively contacting the acidic liquid, negatively impacting subsequent leaching reactions and reducing recovery efficiency. Summary of the Invention

[0004] Therefore, the purpose of this invention is to provide a grinding device based on palladium carbon recovery, in order to solve the problem in the prior art that the fine powder generated by grinding will block the pores of the material, which contradicts the purpose of exposing the palladium encapsulated inside the material and reduces the recovery efficiency.

[0005] This invention provides a grinding apparatus based on palladium-on-carbon recovery, comprising: a roller mounted on a machine base, the roller being connected to a roller drive assembly for grinding materials, wherein... One end of the roller is provided with a feed inlet and an air inlet, and the other end is provided with a discharge pipe, so as to form an airflow between the air inlet and the discharge pipe, and to transport the dust generated during grinding to the discharge pipe through the airflow; The discharge pipe is equipped with a filter screen to prevent the leakage of particulate materials other than dust.

[0006] Optionally, the interior of the drum also includes a material-turning structure, which, when the drum rotates, carries the material accumulated at the bottom of the drum to the top of the drum, and then scatters it from the top of the drum to release dust from the material.

[0007] Optionally, the turning structure includes raised strips that extend along the axial direction of the roller and are spaced out in multiples along the inner sidewall of the roller.

[0008] Optionally, the roller is inclined, with the discharge side higher than the feed side, and the raised strip is also provided with a plurality of partitions spaced apart along the axial direction of the roller.

[0009] Optionally, a sliding plate is fixedly installed in the discharge pipe, the filter screen is slidably installed on the sliding plate, and an elastic membrane is provided between the filter screen and the discharge pipe. The elastic membrane expands or retracts according to the movement of the filter screen.

[0010] Optionally, an electromagnet is also fixedly installed on the discharge pipe, and a metal sheet is also fixedly installed on the elastic membrane. When the elastic membrane is unfolded, the electromagnet and the metal sheet are aligned and matched to control the movement of the metal sheet according to the controllable magnetism of the electromagnet, thereby causing the elastic membrane to vibrate.

[0011] Optionally, the filter screen is connected to a drive module, which is further configured to: after driving the filter screen to move and unfold the elastic membrane, place the filter screen in a floating state so that the filter screen vibrates in accordance with the shaking of the elastic membrane.

[0012] Optionally, the drive module includes: a first sleeve, a connecting rod, and a driver, wherein, The first sleeve is connected to the driver in a driving connection; The connecting rod is movably disposed inside the first sleeve. One end of the connecting rod is hinged to the filter screen, and the other end is bidirectionally limited to the first sleeve.

[0013] Optionally, the drive module further includes a second sleeve, wherein, The first sleeve is also provided with a spring, and is connected to the connecting rod through the spring. The side wall of the first sleeve is also provided with a guide groove. The side wall of the connecting rod is provided with a guide pin, and the guide pin is slidably connected to the guide groove; The second sleeve is fixedly installed in the discharge pipe and sleeved outside the first sleeve. The end face of the second sleeve pointing towards the filter screen is provided with a guide slope. The guide groove includes a continuous straight section and a triangular section. The straight section is located close to the filter screen. The bottom edge and the main inclined edge of the triangular section are connected to the straight section. The bottom edge is perpendicular to the driving direction of the first sleeve. The guide ramp is used to move the guide rod along the bottom edge to the straight area, so as to place the filter screen in a floating state; The main inclined side is used to guide the guide rod from the straight area into the triangular area, and the bottom side limits the guide pin so that the drive module can pull the filter screen.

[0014] Optionally, a rigid plate is also flipped and connected to the bottom surface of the slide plate. The end of the rigid plate near the discharge direction is rotatably connected to the slide plate, and a blocking membrane is provided between the end near the feed direction and the slide plate.

[0015] The grinding device based on palladium-carbon recovery provided by this invention includes a drum mounted on a machine base. The drum is connected to a drum drive assembly and is used for grinding materials. One end of the drum is provided with a feed inlet and an air inlet, and the other end is provided with a discharge pipe to form an airflow between the air inlet and the discharge pipe. The airflow carries the dust generated during grinding to the discharge pipe. A filter screen is installed in the discharge pipe to prevent the leakage of particulate materials other than dust. In the grinding process, by controlling the airflow intensity and the filter screen, this invention can retain the heavier effective material and carry out the lighter powder through the airflow, avoiding powder residue in the drum from clogging the material pores, ensuring the porosity of the final product, ensuring the efficiency of the palladium metal leaching reaction in the material, and ensuring the recovery efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the grinding device based on palladium carbon recovery in an embodiment of the present invention; Figure 2 This is a schematic diagram of the roller drive structure of the grinding device based on palladium carbon recovery in an embodiment of the present invention; Figure 3 This is a cross-sectional view of a grinding device based on palladium carbon recovery in an embodiment of the present invention; Figure 4 This is a schematic diagram of the slide plate part of the grinding device based on palladium carbon recovery in an embodiment of the present invention; Figure 5 This is a schematic diagram of the filter installation of the grinding device based on palladium carbon recovery in an embodiment of the present invention; Figure 6 for Figure 5 A magnified view of a portion of region A in the middle; Figure 7 This is a partial structural schematic diagram of the drive module of the grinding device based on palladium carbon recovery in an embodiment of the present invention.

[0017] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] To address the problem in existing grinding technologies where fine powder generated can clog material pores, contradicting the purpose of exposing the palladium encapsulated within the material and reducing recovery efficiency, this invention provides a grinding device for palladium-carbon recovery. The device includes a drum mounted on a machine platform, connected to a drum drive assembly. The drum is used for grinding materials. One end of the drum has a feed inlet and an air inlet, while the other end has a discharge pipe. An airflow is formed between the air inlet and the discharge pipe, and the airflow carries the dust generated during grinding towards the discharge pipe. A filter screen is installed in the discharge pipe to prevent the leakage of particulate matter other than dust. During grinding, by controlling the airflow intensity and the filter screen, heavier effective materials can be retained, while lighter powder is carried out by the airflow. This prevents powder residue from clogging the material pores within the drum, ensuring the porosity of the final product, maximizing the palladium leaching reaction efficiency, and guaranteeing the overall recovery efficiency.

[0022] Specifically, please refer to Figure 1 , Figure 2 and Figure 3 In this embodiment, the grinding device uses a machine base as a carrier. A support 1 is set on the machine base, and a roller 10 is mounted on the support 1 (not shown in the rolling bearing structure diagram). It is driven by a roller drive assembly consisting of a drive motor 7, a gear 8, and a gear ring 9. The gear ring 9 is fixedly mounted outside the roller 10 and meshes with the gear 8. The gear 8 is fixedly mounted on the output shaft of the drive motor 7. The drive motor 7 controls the roller 10 to roll and grind the material inside the roller 10.

[0023] To protect the roller drive assembly, a protective cover 2 is also provided between the brackets 1 to enclose the roller 10 and the roller drive assembly inside the protective cover 2, so as to avoid external debris from interfering with the meshing reliability of the gear 8 and the gear ring 9.

[0024] One end of the drum 10 is provided with a feed inlet and an air inlet, which are connected to the feed pipe 4 and the air inlet pipe 3. The other end is connected to the discharge pipe 5 to form an airflow between the air inlet and the discharge pipe 5. The dust generated during grinding can be conveyed to the discharge pipe 5 through this airflow to discharge the dust and prevent dust from remaining in the drum 10 and clogging the material pores. At the same time, in order to prevent the airflow from carrying out the material, a filter screen 15 is provided in the discharge pipe 5 to block the leakage of particulate materials other than dust. The pore size and airflow intensity of the filter screen 15 can be specifically set according to the actual situation, and this application does not impose any special restrictions on them.

[0025] A discharge port 6 is provided at the bottom of the discharge pipe 5 to reduce dust accumulation inside the pipe. The discharge pipe 5 is detachably connected to the roller 10. After grinding, the discharge pipe 5 can be removed to take out the ground material from the roller 10, and the disassembled discharge pipe 6 is easy to clean and maintain. It is understood that this invention mainly focuses on dust treatment, and does not impose any special restrictions on the feeding structure, which can be flexibly selected according to the actual situation.

[0026] To facilitate the separation of dust and materials, in this embodiment, the inside of the drum 10 also includes a material turning structure, which is used to lift the material accumulated at the bottom of the drum 10 to the top of the drum 10 when the drum 10 rotates, and then sprinkle it down from the top of the drum 10, so as to further release the dust in the material during the sprinkling process, and facilitate the dust to be discharged with the airflow.

[0027] As a specific example, such as Figure 3 As shown, in this embodiment, the material turning structure includes a raised strip 11, which extends along the axial direction of the roller 10 and is provided in multiple circumferentially spaced along the inner sidewall of the roller 10.

[0028] To improve grinding efficiency, the roller 10 is usually tilted. To ensure material turning efficiency, in this embodiment, the discharge side of the roller 10 is higher than the feed side. The raised strip 11 is also provided with a plurality of partitions 13 spaced apart along the axial direction of the roller. The partitions 13 limit the formation of a plurality of material troughs 12. The material is limited in the material troughs 12, which can prevent the material from accumulating at the lower end of the raised strip 11, thereby dispersing the turned-up material and spreading it evenly.

[0029] As grinding progresses, the amount of free dust gradually decreases, requiring an appropriate increase in airflow velocity. However, this also increases the amount of material carried by the airflow, making it more susceptible to impact and damage to the filter screen 15. To protect the filter screen 15, this embodiment provides [further details omitted]. Please refer to [link / reference omitted]. Figure 3 , Figure 4 and Figure 5 The discharge pipe 5 is also equipped with a slide plate 19, which is fixed in the discharge pipe 5 by a fixing bracket 18. The filter screen 15 is slidably mounted on the slide plate 19 by a filter screen bracket 14. An elastic membrane 23 is also provided between the filter screen 15 and the discharge pipe 5.

[0030] The elastic membrane 23 is fixed to the filter screen support 14 by the membrane support 26, which facilitates disassembly and maintenance.

[0031] In its initial state, the filter screen 15 is positioned close to the roller 10, and the elastic membrane 23 is in a retracted state. When an increase in airflow velocity is required, the filter screen 15 is moved along the slide plate 19 away from the roller 10, and the elastic membrane 23 simultaneously unfolds (e.g., Figure 3 As shown in the figure, although the particles carried by the airflow move with the airflow, they mainly move downwards at an angle. After the filter screen 15 moves away from the roller 10, most of these particles will fall onto the elastic membrane 23, which can effectively reduce the material that directly impacts the filter screen 15 and protect the filter screen 15.

[0032] Meanwhile, the material particles impacting the elastic membrane 23 can also vibrate on the elastic membrane 23 using the elasticity of the elastic membrane 23, which can shake off the dust attached to the material particles and further improve the dust separation and discharge effect.

[0033] To reduce material deposition on the slide plate 19, in this embodiment, the top surface of the slide plate 19 is provided as an arc-shaped structure 27, which facilitates the shaking of the slide plate 19 by means of the vibration effect of the elastic membrane 23.

[0034] To further improve the blocking effect on particulate materials, in this embodiment, a receiving groove 20 is provided on the lower surface of the slide plate 19, in which a rigid plate 21 is flipped and connected. The end of the rigid plate 21 near the discharge direction is rotatably connected to the slide plate 19, and a blocking membrane 22 is provided between the end near the feed direction and the slide plate 19.

[0035] like Figure 3 As shown, when the filter screen 15 moves away from the roller, the rigid plate 21 can flip down under the action of gravity, unfolding the barrier membrane 22 to block particulate materials. When the filter screen 15 moves closer to the roller 10, the filter screen support 14 can retract the rigid plate 21 and the barrier membrane 22.

[0036] To improve the shaking effect of the elastic membrane 23 on the material, in this embodiment, an electromagnet 24 is also fixedly installed on the discharge pipe 5, and a metal sheet 25 is also fixedly installed on the elastic membrane 23. When the elastic membrane 23 is unfolded, the electromagnet 24 and the metal sheet 25 are aligned and matched, and the movement of the metal sheet 25 is controlled according to the controllable magnetism of the electromagnet 24, so as to actively control the shaking of the elastic membrane 23.

[0037] To prevent material from adhering and depositing on the filter screen 15, in this embodiment, the drive module of the filter screen 15 is also used to place the filter screen 15 in a floating state after the elastic membrane 23 is unfolded by driving the filter screen 15 to move, so that the filter screen 15 vibrates with the shaking of the elastic membrane 15, thereby shaking off the material adhering to the filter screen 15.

[0038] For details, please refer to further information. Figure 5 , Figure 6 and Figure 7 The drive module in this embodiment includes a first sleeve 28, a connecting rod 29, and a driver 16. The driver 16 is fixed on the fixed frame 18. The first sleeve 28 is fixedly connected to the driver 16. The first sleeve 28 is bidirectionally limited to the connecting rod 29 so as to ensure the pushing and pulling effect of the connecting rod 29 through bidirectional rigid limiting. After the moving filter 15 is in place, the floating of the filter 15 is realized by utilizing the movable space between the bidirectional limiting.

[0039] As a specific example, in this embodiment, the drive module further includes a second sleeve 34, which is fixedly installed in the discharge pipe 5 by a fixing bracket 18 and sleeved outside the first sleeve 28. The end face of the second sleeve 34 pointing towards the filter screen 15 is provided with a guide slope 35. The side wall of the first sleeve 28 is provided with a guide groove, and the connecting rod 29 is movably installed in the first sleeve 28. One end of the connecting rod 29 is hinged to the filter screen bracket 14 and hinged to the filter screen 15, and the other end side wall is provided with a guide pin 30, which is slidably connected to the guide groove. A spring 33 is also provided in the first sleeve 28 and is connected to the connecting rod 29 through the spring 33. The guide groove includes a continuous straight section 32 and a triangular section 31. The straight section 32 is located close to the filter screen 15, and the bottom edge and main inclined edge of the triangular section 31 are connected to the straight section 32. The bottom edge is perpendicular to the driving direction of the first sleeve 28.

[0040] When the actuator 16 pushes the first sleeve 28, the guide pin 30 moves along the straight section 32 to the triangular section 31 and rotates to the inside through the main inclined side of the triangular section 31, at which point it can push the connecting rod 29 to move. When the actuator 16 pulls the first sleeve 28, the guide pin 30 is limited by the bottom edge of the triangular section 31, which can pull the connecting rod 29. When the guide pin 30 moves to the guide inclined surface 35, as the actuator 16 pulls the first sleeve 28 and the connecting rod 29, the guide pin 30 moves along the guide inclined surface 35 out of the triangular section 31 to the straight section 32. At this time, the connecting rod 29 pops out under the action of the spring 33, and at the same time, the guide pin 30 is limited in the straight section 31 by the pull of the spring 33. The connecting rod 29 is in a floating state at this time, thereby placing the filter screen 15 in a floating state.

[0041] To enable the movement of the guide pin 30, the connecting rod 29 and the filter support 14 are rotatably hinged. Since the connecting rod 29 can rotate, to prevent the guide pin 30 from moving out of the straight section 32 of the guide groove and being unable to retract into the guide groove, the outer end of the straight section 32 can be closed.

[0042] It is understood that the connecting rod 29 and the filter support 14 can be fixedly connected. Correspondingly, the first sleeve 28 can be set to be rotatable, and the matching logic between the guide pin 30 and the guide groove can be realized by controlling the movement of the guide groove.

[0043] The palladium-carbon recovery grinding device based on this invention includes a drum mounted on a machine base, which is connected to a drum drive assembly. The drum is used for grinding materials. One end of the drum is provided with a feed inlet and an air inlet, and the other end is provided with a discharge pipe to form an airflow between the air inlet and the discharge pipe. The airflow carries the dust generated during grinding to the discharge pipe. A filter screen is installed in the discharge pipe to prevent the leakage of particulate materials other than dust. During grinding, by controlling the airflow intensity and the filter screen, the heavier effective material can be retained, while the lighter powder generated is carried out by the airflow. This avoids powder residue in the drum clogging the material pores, ensuring the porosity of the final product, ensuring the efficiency of the palladium metal leaching reaction in the material, and ensuring the recovery efficiency.

[0044] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The embodiments described above are merely illustrative of several specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A grinding device based on palladium on carbon recovery, characterized in that, include: A roller mounted on the machine base, the roller being driven by a roller drive assembly, is used for material grinding. One end of the roller is provided with a feed inlet and an air inlet, and the other end is provided with a discharge pipe, so as to form an airflow between the air inlet and the discharge pipe, and to transport the dust generated during grinding to the discharge pipe through the airflow; The discharge pipe is equipped with a filter screen to prevent the leakage of particulate materials other than dust.

2. The grinding apparatus based on palladium-carbon recovery according to claim 1, characterized in that, The drum also includes a material-turning structure inside, which is used to lift the material accumulated at the bottom of the drum to the top of the drum when the drum rotates, and then sprinkle it down from the top of the drum to release the dust in the material.

3. The grinding apparatus based on palladium-carbon recovery according to claim 2, characterized in that, The material turning structure includes raised strips that extend along the axial direction of the roller and are arranged in multiple circumferentially along the inner sidewall of the roller.

4. The grinding apparatus based on palladium-carbon recovery according to claim 3, characterized in that, The roller is inclined, with the discharge side higher than the feed side, and the raised strip is also provided with a plurality of partitions spaced apart along the axial direction of the roller.

5. The grinding apparatus based on palladium-carbon recovery according to claim 1, characterized in that, A sliding plate is also fixedly installed in the discharge pipe, and the filter screen is slidably installed on the sliding plate. An elastic membrane is also provided between the filter screen and the discharge pipe, and the elastic membrane expands or retracts according to the movement of the filter screen.

6. The grinding apparatus based on palladium-carbon recovery according to claim 5, characterized in that, An electromagnet is also fixedly installed on the discharge pipe, and a metal sheet is also fixedly installed on the elastic membrane. When the elastic membrane is unfolded, the electromagnet and the metal sheet are aligned and matched to control the movement of the metal sheet according to the controllable magnetism of the electromagnet, thereby causing the elastic membrane to vibrate.

7. The grinding apparatus based on palladium-carbon recovery according to claim 6, characterized in that, The filter screen is connected to the drive module, which is further configured to: after driving the filter screen to move and unfold the elastic membrane, place the filter screen in a floating state so that the filter screen vibrates in accordance with the shaking of the elastic membrane.

8. The grinding apparatus based on palladium-carbon recovery according to claim 7, characterized in that, The drive module includes: a first sleeve, a connecting rod, and a driver, wherein... The first sleeve is connected to the driver in a driving connection; The connecting rod is movably disposed inside the first sleeve. One end of the connecting rod is hinged to the filter screen, and the other end is bidirectionally limited to the first sleeve.

9. The grinding apparatus based on palladium-carbon recovery according to claim 8, characterized in that, The drive module also includes a second sleeve, wherein... The first sleeve is also provided with a spring, and is connected to the connecting rod through the spring. The side wall of the first sleeve is also provided with a guide groove. The side wall of the connecting rod is provided with a guide pin, and the guide pin is slidably connected to the guide groove; The second sleeve is fixedly installed in the discharge pipe and sleeved outside the first sleeve. The end face of the second sleeve pointing towards the filter screen is provided with a guide slope. The guide groove includes a continuous straight section and a triangular section. The straight section is located close to the filter screen. The bottom edge and the main inclined edge of the triangular section are connected to the straight section. The bottom edge is perpendicular to the driving direction of the first sleeve. The guide ramp is used to move the guide rod along the bottom edge to the straight area, so as to place the filter screen in a floating state; The main inclined side is used to guide the guide rod from the straight area into the triangular area, and the bottom side limits the guide pin so that the drive module can pull the filter screen.

10. The grinding apparatus based on palladium-carbon recovery according to claim 5, characterized in that, A rigid plate is also flipped and connected to the bottom surface of the slide plate. The end of the rigid plate near the discharge direction is rotatably connected to the slide plate, and a blocking membrane is provided between the end near the feed direction and the slide plate.

Images