Aeration separation device for graphite regeneration and separation process thereof

Abstract

The invention belongs to the technical field of aeration separation, and particularly relates to an aeration separation device for graphite regeneration and a separation process thereof.The aeration separation device comprises an aeration tank, a partition plate is arranged in the aeration tank and divides the aeration tank into an aeration area and a settling area, a communicating hole is formed in the upper end of the partition plate, a feeding pipe is arranged at the upper end of the aeration tank, and a water inlet pipe is arranged at the lower end of the aeration tank; the feeding pipe and the water inlet pipe are both communicated with the aeration area, and an aeration assembly for introducing air into the aeration area is arranged in the aeration area; a stirring assembly is arranged in the aeration tank, a stirring end of the stirring assembly extends into the aeration area, a second extraction assembly is arranged at the upper end of the settling area, and a first extraction assembly is arranged at the lower end of the settling area. The stirring assembly and the aeration assembly are matched to enable the copper-containing negative pole piece raw material to achieve the effect of separating the copper sheet from the graphite powder, after aeration is finished, the graphite floating object floats on the liquid level after precipitation, and the heavier copper sheet sinks to the bottom of the precipitation area, so that the separation efficiency is high, and the operation complexity is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of aeration separation, and in particular relates to an aeration separation device for graphite regeneration and a separation process thereof. Background Art

[0002] Waste batteries are the main source of copper-containing negative electrode plates. These batteries need to be recycled after their service life to recover valuable metal components. Recycling copper and graphite in waste batteries can not only reduce resource waste, but also reduce the production cost of new materials. At the same time, battery recycling is also conducive to reducing the pollution of waste to the environment and is an important sustainable development measure.

[0003] The negative electrode inside the battery is usually composed of copper foil and graphite powder. In order to recycle these materials, they need to be separated from the battery. Common separation methods include mechanical crushing, acid leaching, etc., which can effectively separate copper foil and graphite powder. The separated copper foil and graphite powder need to be further separated to obtain a high-purity final product.

[0004] The commonly used separation method usually adopts physical screening. The mixture of copper foil and graphite powder is put into the screening equipment, and multi-level screens are set up to separate materials of different particle sizes through vibration or rotation, and the copper flakes and graphite powder are screened out step by step.

[0005] However, this screening method has low separation efficiency, complicated operation of setting up multi-stage screens, and is prone to cause environmental pollution. Summary of the invention

[0006] In view of this, in order to solve the problems existing in the prior art, the purpose of the present invention is to provide an aeration separation device for graphite regeneration and a separation process thereof, which has the effects of high separation efficiency and reduced operation complexity.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] An aeration separation device for graphite regeneration, comprising: an aeration tank, wherein a partition is provided in the aeration tank to separate the aeration tank into an aeration zone and a sedimentation zone, a connecting hole connecting the aeration zone and the sedimentation zone is provided at the upper end of the partition, a feed pipe is provided at the upper end of the aeration tank, a water inlet pipe is provided at the lower end of the aeration tank, the feed pipe and the water inlet pipe are both connected to the aeration zone, an aeration component is provided in the aeration zone, and the aeration component is used to ventilate the aeration zone;

[0009] The aeration tank is provided with a stirring assembly, the stirring end of the stirring assembly extends into the aeration zone, the upper end of the sedimentation zone is provided with a second extraction assembly for extracting separated graphite floating objects, and the lower end of the sedimentation zone is provided with a first extraction assembly for extracting separated copper sheets.

[0010] The specific technical effect is: by setting a partition, the aeration tank is divided into an aeration zone and a sedimentation zone, and then the stirring component and the aeration component are used to separate the copper-containing negative electrode plate raw material from the copper sheet and the graphite powder. After the aeration is completed, the liquid containing graphite floating matter and copper sheets enters the sedimentation zone through the connecting hole and precipitates in the sedimentation zone. After precipitation, the graphite floating matter floats on the liquid surface, while the heavier copper sheets sink to the bottom of the sedimentation zone, so that the copper sheets and the graphite powder can be fully separated.

[0011] Furthermore, the aeration assembly includes an air compressor, an air inlet pipe and a central guide tube, the central guide tube is arranged in the aeration area, the lower end of the central guide tube is connected to the air compressor through the air inlet pipe, and the air compressor is arranged outside the lower end of the aeration tank.

[0012] The specific technical effect is: the copper-containing negative electrode raw material and pure water are mixed and placed in the aeration area, and air is continuously injected into the aeration area through an air compressor. Due to the different movement characteristics of materials of different densities in the gas-liquid two-phase flow, the lighter material will be carried to the liquid surface by the air flow, while the heavier material will settle to the bottom of the pool.

[0013] Furthermore, a plurality of ventilation holes are provided on the side wall of the central flow guide tube, and the ventilation holes connect the interior of the central flow guide tube with the aeration area.

[0014] Furthermore, the stirring assembly includes a drive motor, a motor mounting seat, a bearing, a stirring shaft and a stirring impeller, the drive motor is arranged on the motor mounting seat, the motor mounting seat is arranged at the upper end of the aeration tank and is located above the aeration zone, the upper end of the stirring shaft is connected to the motor shaft of the drive motor, the lower end of the stirring shaft extends into the aeration zone, and the stirring impeller is arranged at the lower end of the stirring shaft.

[0015] The specific technical effect is: the stirring effect is achieved by driving the stirring impeller with a driving motor. Stirring can strengthen the contact and mixing between the solid in the liquid and the airflow, improve the uniformity of the gas-liquid two-phase flow, and is conducive to improving the separation effect. It can also change the flow characteristics of the liquid, such as flow rate, etc., thereby affecting the generation, rise and breakage of bubbles, and then adjust the separation effect.

[0016] Furthermore, the first extraction component includes a first extraction pump and a first discharge pipe, one end of the first discharge pipe is connected to the first extraction pump, and the other end of the first discharge pipe extends into the lower end of the sedimentation area for extracting the separated copper sheets.

[0017] The specific technical effect is: the copper sheets sunk to the bottom of the pool after separation are extracted through the first extraction pump and the first discharge pipe and then crushed.

[0018] Furthermore, the second extraction assembly includes a graphite collection tank, a second extraction pump and a second discharge pipe, one end of the second discharge pipe is connected to the graphite collection tank, and the other end of the second discharge pipe extends into the upper end of the sedimentation zone, and is used to extract the graphite floating matter after extraction and separation, and the second extraction pump is installed on the second discharge pipe.

[0019] The specific technical effect is: the graphite floating matter floating on the liquid surface is extracted into the graphite collection pool through the second extraction pump and the second discharge pipe for subsequent treatment.

[0020] Furthermore, an inclined guide plate is formed in the sedimentation area, and the inclined guide plate is arranged obliquely downward from the upper end to the lower end of the sedimentation area.

[0021] The specific technical effect is: by adopting the design of inclined guide plate to play a guiding role, the copper sheet can sink to the bottom of the pool better, which is convenient for subsequent extraction.

[0022] Furthermore, it also includes a plurality of support bases, which are arranged at the lower end of the aeration tank.

[0023] Furthermore, it also includes a hopper for feeding copper-containing negative electrode plate raw materials, and the lower end of the hopper is connected to the feeding pipe.

[0024] An aeration separation process for graphite regeneration, using the aeration separation device for graphite regeneration as described above to separate graphite from copper sheets, wherein the process comprises the following steps:

[0025] Step S1, feeding the copper-containing negative electrode plate raw material into the aeration area through a feed pipe;

[0026] Step S2, adding pure water into the aeration zone through the water inlet pipe, the ratio of the copper-containing negative electrode plate raw material added in step S1 to the pure water is 1:2 to 1:4;

[0027] Step S3, start the air compressor, the air enters the central guide tube from the air inlet pipe, and enters the aeration area through a plurality of vents on the central guide tube, and the air flow rate is set to 500L / min to 700L / min;

[0028] Step S4, starting the driving motor to drive the stirring shaft to rotate and then drive the stirring impeller to rotate, and the stirring speed is set to 150rpm-250rpm;

[0029] Step S5, maintaining the normal temperature at 25°C, and setting the aeration time to two hours, that is, step S3 and step S4 are run for 2h to 5h;

[0030] Step S6, the liquid containing the graphite floating objects and the copper flakes enters the precipitation zone through the connecting hole and precipitates in the precipitation zone, after which the graphite floating objects float on the liquid surface, while the heavier copper flakes sink to the bottom of the precipitation zone;

[0031] Step S7, start the second pumping pump to extract the graphite floating matter into the graphite collection tank through the second discharge pipe, and perform subsequent treatment;

[0032] Step S8, start the first extraction pump to discharge the copper sheets from the first discharge pipe, and collect them for the next step of crushing.

[0033] The specific technical effect is: after aeration, graphite will float on the liquid surface due to its low density, while the heavier copper sheets will sink to the bottom of the pool. The aeration separation process can fully separate the copper sheets from the graphite powder. This method not only improves the separation efficiency, but also reduces the operational complexity and environmental pollution, making it the preferred process for processing copper-containing negative electrode sheets.

[0034] The beneficial effects of the present invention are:

[0035] The aeration tank is divided into an aeration zone and a sedimentation zone by setting a partition, and the stirring component and the aeration component are used to separate the copper sheet from the graphite powder of the copper-containing negative electrode raw material. After the aeration is completed, the liquid containing the graphite floating matter and the copper sheet enters the sedimentation zone through the connecting hole and precipitates in the sedimentation zone. After precipitation, the graphite floating matter floats on the liquid surface, while the heavier copper sheet sinks to the bottom of the sedimentation zone, so that the copper sheet and the graphite powder can be fully separated.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic structural diagram of the aeration separation device for graphite regeneration of the present invention;

[0039] Figure 2 yes Figure 1 A top view of

[0040] Figure 3 yes Figure 2 Sectional view at AA in the middle;

[0041] Figure 4 It is a schematic diagram of the principle of a separation process of the present invention.

[0042] In the figure:

[0043] 1. Aeration tank; 2. Baffle; 3. Aeration zone; 4. Sedimentation zone; 5. Connecting hole; 6. Feed pipe; 7. Water inlet pipe; 8. Air compressor; 9. Inlet pipe; 10. Center guide tube; 11. Air vent; 12. Drive motor; 13. Motor mounting seat; 14. Bearing; 15. Agitator shaft; 16. Agitator impeller; 17. First extraction pump; 18. First discharge pipe; 19. Graphite collection tank; 20. Second extraction pump; 21. Second discharge pipe; 22. Inclined guide plate; 23. Support base; 24. Hopper. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] like Figures 1 to 3 As shown, an aeration separation device for graphite regeneration includes: an aeration tank 1, a partition 2 is arranged in the aeration tank 1 to divide the aeration tank 1 into an aeration zone 3 and a sedimentation zone 4, a connecting hole 5 connecting the aeration zone 3 and the sedimentation zone 4 is opened at the upper end of the partition 2, a feed pipe 6 is arranged at the upper end of the aeration tank 1, a water inlet pipe 7 is arranged at the lower end of the aeration tank 1, the feed pipe 6 and the water inlet pipe 7 are both connected to the aeration zone 3, an aeration component is arranged in the aeration zone 3, and the aeration component is used to ventilate the aeration zone 3;

[0046] A stirring assembly is provided on the aeration tank 1, and the stirring end of the stirring assembly extends into the aeration zone 3. A second extraction assembly for extracting separated graphite floating objects is provided at the upper end of the sedimentation zone 4, and a first extraction assembly for extracting separated copper sheets is provided at the lower end of the sedimentation zone 4.

[0047] It should be noted here that: the aeration tank 1 is divided into an aeration zone 3 and a sedimentation zone 4 by setting a partition 2, and then the stirring component and the aeration component are used to separate the copper sheet from the graphite powder in the copper-containing negative electrode plate raw material. After the aeration is completed, the liquid containing the graphite floating matter and the copper sheet enters the sedimentation zone 4 through the connecting hole 5 and precipitates in the sedimentation zone 4. After precipitation, the graphite floating matter floats on the liquid surface, while the heavier copper sheet sinks to the bottom of the sedimentation zone 4, so that the copper sheet and the graphite powder can be fully separated.

[0048] The aeration assembly includes an air compressor 8, an air inlet pipe 9 and a central guide tube 10. The central guide tube 10 is arranged in the aeration area 3. The lower end of the central guide tube 10 is connected to the air compressor 8 through the air inlet pipe 9. The air compressor 8 is arranged outside the lower end of the aeration tank 1.

[0049] It should be noted here that: the copper-containing negative electrode raw material and pure water are mixed and placed in the aeration zone 3, and air is continuously injected into the aeration zone 3 through the air compressor 8. Due to the different movement characteristics of materials of different densities in the gas-liquid two-phase flow, the lighter material will be brought to the liquid surface by the air flow, while the heavier material will settle to the bottom of the pool.

[0050] A plurality of ventilation holes 11 are provided on the side wall of the central draft tube 10 , and the ventilation holes 11 communicate with the interior of the central draft tube 10 and the aeration area 3 .

[0051] The stirring assembly includes a driving motor 12, a motor mounting seat 13, a bearing 14, a stirring shaft 15 and a stirring impeller 16. The driving motor 12 is arranged on the motor mounting seat 13. The motor mounting seat 13 is arranged at the upper end of the aeration tank 1 and is located above the aeration zone 3. The upper end of the stirring shaft 15 is connected to the motor shaft of the driving motor 12, the lower end of the stirring shaft 15 extends into the aeration zone 3, and the stirring impeller 16 is arranged at the lower end of the stirring shaft 15.

[0052] It should be noted here that the stirring effect is achieved by driving the stirring impeller 16 to rotate through the driving motor 12. Stirring can strengthen the contact and mixing between the solid in the liquid and the airflow, improve the uniformity of the gas-liquid two-phase flow, and is conducive to improving the separation effect. It can also change the flow characteristics of the liquid, such as flow rate, etc., thereby affecting the generation, rise and breakage process of bubbles, and then adjust the separation effect.

[0053] The first extraction assembly includes a first extraction pump 17 and a first discharge pipe 18. One end of the first discharge pipe 18 is connected to the first extraction pump 17, and the other end of the first discharge pipe 18 extends into the lower end of the precipitation area 4 for extracting the separated copper sheets.

[0054] It should be noted here that the copper sheets sunk to the bottom of the pool after separation are extracted by the first extraction pump 17 and the first discharge pipe 18 and subsequently crushed.

[0055] The second extraction assembly includes a graphite collection tank 19, a second extraction pump 20 and a second discharge pipe 21. One end of the second discharge pipe 21 is connected to the graphite collection tank 19, and the other end of the second discharge pipe 21 extends into the upper end of the sedimentation zone 4, and is used to extract the graphite floating matter after extraction and separation. The second extraction pump 20 is installed on the second discharge pipe 21.

[0056] It should be noted here that the graphite floating matter floating on the liquid surface is extracted into the graphite collection pool 19 through the second extraction pump 20 and the second discharge pipe 21 for subsequent treatment.

[0057] An inclined guide plate 22 is formed in the sedimentation area 4 , and the inclined guide plate 22 is arranged to be inclined downward from the upper end to the lower end of the sedimentation area 4 .

[0058] It should be noted here that the inclined guide plate 22 plays a guiding role, so that the copper sheet can sink to the bottom of the pool better, which is convenient for subsequent extraction.

[0059] It also includes a plurality of support bases 23 , which are arranged at the lower end of the aeration tank 1 .

[0060] It also includes a hopper 24 for feeding copper-containing negative electrode plate raw materials, and the lower end of the hopper 24 is connected to the feed pipe 6.

[0061] like Figure 4 As shown, the specific separation steps of the aeration separation process of the present invention are as follows:

[0062] Step S1, feeding the copper-containing negative electrode raw material into the aeration zone 3 through the feed pipe 6;

[0063] Step S2, adding pure water into the aeration zone 3 through the water inlet pipe 7, the ratio of the copper-containing negative electrode plate raw material added in step S1 to the pure water is 1:2 to 1:4;

[0064] Step S3, start the air compressor 8, the air enters the central guide tube 10 from the air inlet pipe 9, and enters the aeration area 3 through the plurality of vents 11 on the central guide tube 10, and the air flow rate is set to 500L / min to 700L / min;

[0065] Step S4, start the driving motor 12, drive the stirring shaft 15 to rotate and then drive the stirring impeller 16 to rotate, and the stirring speed is set to 150rpm~250rpm;

[0066] Step S5, maintaining the normal temperature at 25°C, and setting the aeration time to two hours, that is, step S3 and step S4 are run for 2h to 5h;

[0067] Step S6, the liquid containing the graphite floating objects and the copper flakes enters the precipitation zone 4 through the connecting hole 5, and is precipitated in the precipitation zone 4. After precipitation, the graphite floating objects float on the liquid surface, while the heavier copper flakes sink to the bottom of the precipitation zone 4;

[0068] Step S7, start the second pumping pump 20 to extract the graphite floating matter into the graphite collection pool 19 through the second discharge pipe 21, and perform subsequent treatment;

[0069] Step S8, start the first extraction pump 17 to discharge the copper sheets from the first discharge pipe 18, and collect them for the next step of crushing.

[0070] It should be noted here that after aeration, graphite will float on the liquid surface due to its low density, while the heavier copper sheets will sink to the bottom of the pool. The aeration separation process can fully separate the copper sheets from the graphite powder. This method not only improves the separation efficiency, but also reduces the operational complexity and environmental pollution, making it the preferred process for processing copper-containing negative electrode sheets.

[0071] The capacity of aeration tank 1 is designed to be 800L, and the raw material of the copper-containing negative electrode plate is: 100kg, with a copper content of 20% and a graphite content of 60%.

[0072] Embodiment 1:

[0073] The amount of pure water added was 400 L, the solid-liquid ratio of the copper-containing negative electrode plate raw material to pure water was 1:3, the air flow rate was set to 600 L / min, the stirring speed was set to 220 rpm, and the aeration time was set to 3.5 hours.

[0074] Separation results: graphite purity is 97%, and copper sheet recovery rate is 92%.

[0075] Embodiment 2:

[0076] The amount of pure water added was 480 L, the solid-liquid ratio of the copper-containing negative electrode plate raw material to pure water was 1:3, the air flow rate was set to 600 L / min, the stirring speed was set to 220 rpm, and the aeration time was set to 3.5 hours.

[0077] Separation results: graphite purity is 99.2%, and copper sheet recovery rate is 94%.

[0078] Embodiment 3:

[0079] The amount of pure water added was 600 L, the solid-liquid ratio of the copper-containing negative electrode plate raw material to pure water was 1:3, the air flow rate was set to 600 L / min, the stirring speed was set to 220 rpm, and the aeration time was set to 3.5 hours.

[0080] Separation results: graphite purity is 96%, and copper sheet recovery rate is 90%.

[0081] From Examples 1 to 3, it can be seen that when other parameters are the same, when the amount of pure water added is 480 L, the graphite purity and copper sheet recovery rate are the highest.

[0082] Embodiment 4:

[0083] The amount of pure water added was 480 L, the solid-liquid ratio of the copper-containing negative electrode plate raw material to pure water was 1:2, the air flow rate was set to 600 L / min, the stirring speed was set to 220 rpm, and the aeration time was set to 3.5 hours.

[0084] Separation results: graphite purity 95%, copper sheet recovery rate 91%.

[0085] Embodiment 5:

[0086] The amount of pure water added was 480 L, the solid-liquid ratio of the copper-containing negative electrode plate raw material to pure water was 1:4, the air flow rate was set to 600 L / min, the stirring speed was set to 220 rpm, and the aeration time was set to 3.5 hours.

[0087] Separation results: graphite purity 96%, copper sheet recovery rate 92%.

[0088] From Example 2, Example 4 and Example 5, it can be concluded that when other parameters are the same, when the solid-liquid ratio of the copper-containing negative electrode sheet raw material to pure water is 1:3, the graphite purity and copper sheet recovery rate are the highest.

[0089] Embodiment 6:

[0090] The amount of pure water added was 480 L, the solid-liquid ratio of the copper-containing negative electrode plate raw material to pure water was 1:3, the air flow rate was set to 500 L / min, the stirring speed was set to 220 rpm, and the aeration time was set to 3.5 hours.

[0091] Separation results: graphite purity 97%, copper sheet recovery rate 92%.

[0092] Embodiment 7:

[0093] The amount of pure water added was 480 L, the solid-liquid ratio of the copper-containing negative electrode plate raw material to pure water was 1:3, the air flow rate was set to 700 L / min, the stirring speed was set to 220 rpm, and the aeration time was set to 3.5 hours.

[0094] Separation results: graphite purity 96%, copper sheet recovery rate 91%.

[0095] It can be seen from Example 2, Example 6 and Example 7 that when other parameters are the same, the air flow rate is set to 600 L / min, and the graphite purity and copper sheet recovery rate are the highest.

[0096] Embodiment 8:

[0097] The amount of pure water added was 480 L, the solid-liquid ratio of the copper-containing negative electrode plate raw material to pure water was 1:3, the air flow rate was set to 600 L / min, the stirring speed was set to 200 rpm, and the aeration time was set to 3.5 hours.

[0098] Separation results: graphite purity 97%, copper sheet recovery rate 92%.

[0099] Embodiment 9:

[0100] The amount of pure water added was 480 L, the solid-liquid ratio of the copper-containing negative electrode plate raw material to pure water was 1:3, the air flow rate was set to 600 L / min, the stirring speed was set to 250 rpm, and the aeration time was set to 3.5 hours.

[0101] Separation results: graphite purity 96%, copper sheet recovery rate 91%.

[0102] From Example 2, Example 8 and Example 9, it can be concluded that when other parameters are the same, the stirring speed is set to 220 rpm, and the graphite purity and copper sheet recovery rate are the highest.

[0103] Embodiment 10:

[0104] The amount of pure water added was 480 L, the solid-liquid ratio of the copper-containing negative electrode plate raw material to pure water was 1:3, the air flow rate was set to 600 L / min, the stirring speed was set to 220 rpm, and the aeration time was set to 2 hours.

[0105] Separation results: graphite purity 95%, copper sheet recovery rate 90%.

[0106] Embodiment 11:

[0107] The amount of pure water added was 480 L, the solid-liquid ratio of the copper-containing negative electrode plate raw material to pure water was 1:3, the air flow rate was set to 600 L / min, the stirring speed was set to 220 rpm, and the aeration time was set to 5 hours.

[0108] Separation results: graphite purity 97%, copper sheet recovery rate 92%.

[0109] From Example 2, Example 10 and Example 11, it can be concluded that when other parameters are the same, the aeration time is set to 3.5 hours, the graphite purity and copper sheet recovery rate are the highest.

[0110] It can be seen from Examples 1 to 11 that when the optimal process parameters are the following data, the graphite purity and copper sheet recovery rate are the highest:

[0111] Aeration tank 1 capacity: 800L

[0112] Add pure water: 480L

[0113] Solid-liquid ratio of copper-containing negative electrode raw material and pure water: 1:3

[0114] Air flow rate is set to: 600L / min

[0115] The stirring speed is set to: 220rpm

[0116] Temperature: Normal temperature 25℃

[0117] Aeration time is set to: 3.5 hours

[0118] The separation results obtained with the optimal process parameters are: graphite purity 99.2% and copper sheet recovery rate 94%.

[0119] In summary, the beneficial effects of the present invention are:

[0120] The aeration tank 1 is divided into an aeration zone 3 and a sedimentation zone 4 by setting a partition 2, and the stirring component and the aeration component are used to separate the copper sheet from the graphite powder in the copper-containing negative electrode plate raw material. After the aeration is completed, the liquid containing the graphite floating matter and the copper sheet enters the sedimentation zone 4 through the connecting hole 5 and precipitates in the sedimentation zone 4. After the precipitation, the graphite floating matter floats on the liquid surface, while the heavier copper sheet sinks to the bottom of the sedimentation zone 4, so that the copper sheet and the graphite powder can be fully separated.

[0121] The various devices selected in this application are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0122] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0123] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0124] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An aeration separation device for graphite regeneration, characterized in that: include: An aeration tank (1), wherein a partition (2) is arranged in the aeration tank (1) to divide the aeration tank (1) into an aeration zone (3) and a sedimentation zone (4), a connecting hole (5) connecting the aeration zone (3) and the sedimentation zone (4) is provided at the upper end of the partition (2), a feed pipe (6) is arranged at the upper end of the aeration tank (1), a water inlet pipe (7) is arranged at the lower end of the aeration tank (1), the feed pipe (6) and the water inlet pipe (7) are both connected to the aeration zone (3), an aeration component is arranged in the aeration zone (3), and the aeration component is used to ventilate the aeration zone (3); The aeration tank (1) is provided with a stirring assembly, the stirring end of the stirring assembly extends into the aeration zone (3), the upper end of the sedimentation zone (4) is provided with a second extraction assembly for extracting separated graphite floating objects, and the lower end of the sedimentation zone (4) is provided with a first extraction assembly for extracting separated copper sheets.

2. The aeration separation device for graphite regeneration as claimed in claim 1, characterized in that: The aeration assembly comprises an air compressor (8), an air inlet pipe (9) and a central guide tube (10); the central guide tube (10) is arranged in the aeration zone (3); the lower end of the central guide tube (10) is connected to the air compressor (8) through the air inlet pipe (9); and the air compressor (8) is arranged outside the lower end of the aeration tank (1).

3. The aeration separation device for graphite regeneration as claimed in claim 2, characterized in that: A plurality of ventilation holes (11) are provided on the side wall of the central flow guide tube (10), and the ventilation holes (11) connect the interior of the central flow guide tube (10) with the aeration zone (3).

4. The aeration separation device for graphite regeneration as claimed in claim 1, characterized in that: The stirring assembly comprises a driving motor (12), a motor mounting seat (13), a bearing (14), a stirring shaft (15) and a stirring impeller (16); the driving motor (12) is arranged on the motor mounting seat (13); the motor mounting seat (13) is arranged at the upper end of the aeration tank (1) and is located above the aeration zone (3); the upper end of the stirring shaft (15) is connected to the motor shaft of the driving motor (12); the lower end of the stirring shaft (15) extends into the aeration zone (3); and the stirring impeller (16) is arranged at the lower end of the stirring shaft (15).

5. The aeration separation device for graphite regeneration as claimed in claim 1, characterized in that: The first extraction component comprises a first extraction pump (17) and a first discharge pipe (18), one end of the first discharge pipe (18) is connected to the first extraction pump (17), and the other end of the first discharge pipe (18) extends into the lower end of the precipitation zone (4) for extracting the separated copper sheets.

6. The aeration separation device for graphite regeneration as claimed in claim 1, characterized in that: The second extraction assembly comprises a graphite collection pool (19), a second extraction pump (20) and a second discharge pipe (21); one end of the second discharge pipe (21) is connected to the graphite collection pool (19); the other end of the second discharge pipe (21) extends into the upper end of the sedimentation zone (4) for extracting the separated graphite floating matter; the second extraction pump (20) is installed on the second discharge pipe (21).

7. The aeration separation device for graphite regeneration as claimed in claim 1, characterized in that: An inclined guide plate (22) is formed in the sedimentation area (4), and the inclined guide plate (22) is arranged to be inclined downward from the upper end to the lower end of the sedimentation area (4).

8. The aeration separation device for graphite regeneration as claimed in claim 1, characterized in that: It also comprises a plurality of support bases (23), wherein the plurality of support bases (23) are arranged at the lower end of the aeration tank (1).

9. The aeration separation device for graphite regeneration as claimed in claim 1, characterized in that: It also includes a hopper (24) for feeding copper-containing negative electrode sheet raw materials, and the lower end of the hopper (24) is connected to the feed pipe (6).

10. An aeration separation process for graphite regeneration, wherein the graphite is separated from the copper sheet by using the aeration separation device for graphite regeneration as claimed in claims 1 to 9, characterized in that: The steps include: Step S1, feeding the copper-containing negative electrode plate raw material into the aeration zone (3) through the feed pipe (6); Step S2, adding pure water into the aeration zone (3) through the water inlet pipe (7), wherein the ratio of the copper-containing negative electrode plate raw material added in step S1 to the pure water is 1:2 to 1:4; Step S3, start the air compressor (8), the air enters the central guide tube (10) from the air inlet pipe (9), and enters the aeration zone (3) through a plurality of vents (11) on the central guide tube (10), and the air flow rate is set to 500L / min to 700L / min; Step S4, starting the driving motor (12), driving the stirring shaft (15) to rotate and then driving the stirring impeller (16) to rotate, and setting the stirring speed to 150 rpm to 250 rpm; Step S5, maintaining the normal temperature at 25°C, and setting the aeration time to two hours, that is, step S3 and step S4 are run for 2h to 5h; Step S6, the liquid containing the graphite floating material and the copper flakes enters the precipitation zone (4) through the connecting hole (5) and is precipitated in the precipitation zone (4). After precipitation, the graphite floating material floats on the liquid surface, while the heavier copper flakes sink to the bottom of the precipitation zone (4); Step S7, start the second extraction pump (20), extract the graphite floating matter through the second discharge pipe (21) into the graphite collection pool (19), and perform subsequent treatment; Step S8, start the first extraction pump (17), discharge the copper sheets from the first discharge pipe (18), and collect them for the next step of crushing.

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