Equipment for reducing specific surface area of graphite

Abstract

The utility model provides equipment for reducing the specific surface area of graphite, and belongs to the technical field of graphite processing. Comprising a solution tank, a stirring tank and a filter press, the solution tank stores a solution and conveys the solution to the stirring tank through the solution conveying assembly, the solution is a dispersing agent solution, and the stirring tank is used for adding graphite and stirring and mixing the graphite and the solution to form a mixed solution; a backflow pipe communicated with the solution tank is arranged on the stirring tank, and after the mixed solution stands still through the backflow pipe, the solution which is not fully mixed with graphite and is located on the upper layer flows back into the solution tank after being filtered by the filtering device; the stirring tank conveys a mixed solution to the filter press through the mixed solution conveying assembly, and the filter press is used for adding pure water and washing off the solution from graphite; the filter press is also used for compressing and filtering graphite. Graphite molecules can be compressed into graphite blocks under the condition that the graphite molecules are more dispersed, and the distribution of the graphite molecules is more uniform.

Description

Technical Field

[0001] The present application relates to the technical field of graphite processing, and in particular to a device for reducing the specific surface area of ​​graphite. Background Art

[0002] Graphite is often used in the negative electrode of lithium batteries for conductivity due to its good conductivity and relatively stable chemical properties.

[0003] The specific surface area of ​​spherical graphite produced by the spherical shaping equipment in the prior art is often too high, which will affect the battery discharge efficiency index and battery safety index. If the specific surface area is too large, lithium precipitation will occur, resulting in increased consumption of specific surface energy, thereby affecting the normal use of the effective capacity of the battery and causing overheating during the charging process, making the battery unsafe. Therefore, it is necessary to compact the graphite to reduce the specific surface area of ​​the graphite.

[0004] In the prior art, a patent with publication number CN204607585U provides a graphite compacting device, which includes a guide rail, a die table, a crane, and a rolling mechanism; the die table is arranged below the guide rail, and the crane is arranged on the guide rail; the rolling mechanism is arranged in the crane, and the rolling mechanism moves toward the die table.

[0005] Although the above scheme compacts the graphite surface evenly by rolling the roller along the guide rail, in actual production, the graphite placed on the mold table may be uneven in itself. Even if the compaction process is uniform, the distribution of the graphite itself on the mold table is uneven, so it is difficult to change the uneven compaction of the graphite at the molecular level.

[0006] On the other hand, in order to make the material more uniform at the molecular level, an active agent is often added to mix the active agent solution with the material. However, during the stirring and mixing process of the material, excessive solution is often added to make the mixing more complete, which causes a waste of material and is not conducive to the subsequent removal of the solution. Utility Model Content

[0007] The purpose of the present application is to provide a device for reducing the specific surface area of ​​graphite, by mixing graphite with a solution to make the distribution of graphite molecules more uniform, then washing away the solution, and filtering the graphite to form a graphite cake. This compression method can reduce the specific surface area of ​​graphite and improve the charge and discharge performance of a lithium battery using the graphite.

[0008] The embodiment of the present application provides a device for reducing the specific surface area of ​​graphite, including: a solution tank, a stirring tank, a filter press and a dispersing device;

[0009] The solution tank stores the solution and transmits the solution to the stirring tank through the solution transmission component.

[0010] The stirring tank is provided with a stirring component and a reflux component;

[0011] The stirring component is used to stir and mix graphite and a solution, and the solution is a dispersant solution;

[0012] The stirring tank is used to add graphite and stir and mix the graphite and the solution to form a mixed solution;

[0013] The stirring tank is provided with a reflux pipe connected with the solution tank, one end of the reflux pipe extends into the stirring tank to extract the upper layer solution in the stirring tank, wherein the upper layer solution is the solution located in the upper layer after the mixed solution is left to stand without being fully mixed with the graphite;

[0014] The reflux pipe is connected to a filtering device for filtering graphite.

[0015] After the standing is completed, the upper layer solution flows back into the solution tank through the reflux pipe after being filtered by the filtering device;

[0016] The stirring tank conveys the mixed solution to the filter press through a mixed solution transmission component, and the filter press is used to add pure water and wash the solution off the graphite; the filter press is also used to compact the graphite;

[0017] The breaking device is connected to the filter press,

[0018] The filter press comprises a cleaning component and a filter pressing component;

[0019] The graphite blocks compacted by the filter press are placed in the dispersing device for drying and then dispersed.

[0020] By adopting the above implementation scheme, the solution is first mixed with the graphite, and then the solution is washed off, the graphite is filter-filtered, and the water can be removed to obtain a uniform graphite cake. The distribution of graphite molecules in the graphite cake is more uniform, and after being applied to the lithium battery field, the battery charging and discharging effect is better; further, the present application extracts the solution that is not mixed with the graphite through the reflux pipe and injects it into the solution tank, thereby realizing multiple utilization of the solution and saving more resources. At the same time, less solution also makes the subsequent rinsing of the graphite simpler and consumes less time.

[0021] In some embodiments, the stirring tank and the solution tank are both lifted off the ground by a bracket.

[0022] The solution transmission component includes a solution outlet arranged at the bottom of the solution tank, a solution addition port arranged at the top of the stirring tank, a solution pipe connecting the solution outlet and the solution addition port, and a first water pump for pumping the solution;

[0023] The first water pump is arranged on the solution pipe and close to the solution outlet, and pumps the solution from the solution tank into the stirring tank.

[0024] The solution outlet in the solution tank is arranged at the bottom, so that the solution can be prevented from being retained in the solution tank and being difficult to be taken out. The water pump is close to the solution tank, so that the solution in the solution pipe can be more easily extracted.

[0025] In some embodiments, a reflux port is provided on the top of the stirring tank, a reflux pipe interface is provided on the solution tank, one end of the reflux pipe extends into the stirring tank through the reflux port, and the other end of the reflux pipe is connected to the reflux pipe interface;

[0026] The return pipe comprises a first part, a second part and a third part,

[0027] One end of the first part extends into the mixing tank, and the other end is connected to the second water pump, and the first part is configured as a transparent hose;

[0028] One end of the second part is connected to the second water pump, and the other end is provided with the filtering device;

[0029] One end of the third part is connected to the filtering device, and the other end is connected to the solution tank through the reflux pipe interface.

[0030] The operator can judge whether the upper solution has been extracted through the transparent first part. When the upper solution is extracted, the second water pump starts to extract the mixed solution below. The operator can see the color change of the solution and shut down the second water pump in time. After the second water pump extracts water, it is connected to the filtration device for filtration, which makes the pressure of the filtration process higher and improves the filtration speed.

[0031] In some embodiments, the reflux pipe penetrates into the stirring tank from the bottom of the stirring tank, and the reflux pipe rises and falls in the stirring tank along with the rise and fall of the pumping head;

[0032] A sealing assembly is provided at the position where the reflux pipe passes through the stirring tank;

[0033] The sealing assembly comprises a bellows sleeved on the return pipe and a sealing flange connecting the bellows and the return pipe;

[0034] The upper end of the bellows is fixed to the pumping head through a sealing flange, and the lower end of the bellows is fixed to the inner wall of the stirring tank through a sealing flange.

[0035] It should be noted that if the reflux pipe enters from the top of the mixing tank, the gravity of the reflux pipe itself and the gravity of the solution during the extraction process will all be pressed on the pumping head, which requires high buoyancy of the pumping head and is not easy to use a thicker reflux pipe, so the pumping efficiency is low;

[0036] By adopting the above technical scheme, a hole is opened at the lower end of the stirring tank so that the reflux pipe passes through the stirring tank from below. At the same time, a bellows and a sealing flange are used to seal the position where the reflux pipe passes through the stirring tank, so that the reflux pipe itself is located in the solution. The reflux pipe will be affected by the buoyancy of the solution, and the pulling force on the pumping head located on the upper layer of the solution is small. Therefore, a thicker reflux pipe can be used, and the working efficiency is higher.

[0037] In some embodiments, the mixed solution transmission component includes a mixed solution outlet disposed at the bottom of the stirring tank, a mixed solution pipe connecting the mixed solution outlet and the filter press, and a third water pump for pumping the mixed solution;

[0038] The third water pump pumps the mixed solution from the stirring tank into the filter press.

[0039] The mixed solution outlet is arranged at the bottom of the stirring tank, so that all the solution in the stirring tank can be extracted to prevent the mixed solution from being retained.

[0040] In some embodiments, it further comprises a pure water tank for providing pure water to the filter press;

[0041] The pure water tank is also provided with a pure water interface, and the fourth water pump pumps the pure water into the filter press through the pure water interface.

[0042] Pure water is stored in a pure water tank. During operation, the fourth water pump is used to pump the pure water into the filter press to clean the graphite and remove the solution in the graphite to prevent the solution from affecting the chemical properties of the graphite and the compression of the graphite.

[0043] In some embodiments, a pumping head is provided at one end of the reflux pipe disposed in the stirring tank; the pumping head includes a pumping structure, a floating structure and a guide plate;

[0044] The upper part of the extraction structure is connected to the return pipe, the bottom is closed, and a plurality of water extraction ports connected to the return pipe are arranged along the side wall;

[0045] The floating structure provides buoyancy for the pumping head and is arranged above the pumping port;

[0046] The guide plate is divided into a bottom plate and a side plate. The bottom plate is slightly larger than the bottom surface of the extraction structure and is arranged at the bottom of the extraction structure. The side plate is arranged around the side wall of the extraction structure. The lower end of the side plate is arranged on the bottom plate, and the upper end extends to cover the water pumping port. The guide plate guides the solution to flow into the water pumping port from above along the gap between the side plate and the extraction structure.

[0047] By adopting the above technical scheme, since a floating structure is provided in the pumping head, the pumping head always floats on the upper layer of the solution, can extract the upper solution, and will descend as the solution plane descends, always being located in the upper layer of the solution, and extracting the upper solution through the pumping port; further, a guide plate is also provided on the pumping head, and the guide plate blocks the bottom and sides of the pumping port so that the solution can only flow into the pumping port from above the pumping port, thereby reducing the disturbance of the bottom solution and avoiding extracting more graphite.

[0048] In some embodiments, it further includes an operating platform arranged around the stirring tank;

[0049] The stirring tank is also provided with a feeding port for adding graphite;

[0050] The height of the operating platform is close to the top of the mixing tank, and a ladder for going up and down the operating platform is arranged on the operating platform;

[0051] The filtering device is arranged on the operating platform.

[0052] Setting up the operating platform makes it convenient for operators to add graphite to the stirring tank, and also makes it convenient for operators to observe the solution reflux process while standing on the operating platform and control the solution reflux process in time.

[0053] In some embodiments, the solution is a K12 solution.

[0054] K12 solution generally refers to sodium dodecyl sulfate, which is easily soluble in water and has dispersing properties. Therefore, graphite can be mixed with it first to make the graphite more evenly distributed, and then the K12 solution can be washed away with pure water. Finally, the graphite is filtered to squeeze out the water in the graphite.

[0055] Other features and corresponding beneficial effects of the present invention are described in the latter part of the specification, and it should be understood that at least part of the beneficial effects become obvious from the description in the specification of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A top view of a device for reducing the specific surface area of ​​graphite provided in an embodiment of the present application;

[0057] Figure 2 A front view of a device for reducing the specific surface area of ​​graphite is provided for an embodiment of the present application;

[0058] Figure 3 A left view of a device for reducing the specific surface area of ​​graphite is provided for an embodiment of the present application;

[0059] Figure 4 A right view of a device for reducing the specific surface area of ​​graphite is provided for an embodiment of the present application;

[0060] Figure 5 A detailed diagram of a pumping head of a device for reducing the specific surface area of ​​graphite is provided for an embodiment of the present application.

[0061] Description of reference numerals:

[0062] 1. Solution tank; 2. Mixing tank; 3. Filter press;

[0063] 4. Solution transmission component; 41. Solution outlet; 42. Solution addition port; 43. Solution pipe; 44. First water pump;

[0064] 5. Reflux pipe; 51. Reflux port; 52. Reflux pipe interface; 53. Filter device; 54. Second water pump; 55. Water pump head;

[0065] 551. extraction structure; 552. floating structure; 553. guide plate;

[0066] 6. Mixed solution transmission component; 61. Mixed solution outlet; 62. Mixed solution pipe; 63. Third water pump;

[0067] 7. Pure water tank; 71. Fourth water pump;

[0068] 8. Operation platform. DETAILED DESCRIPTION

[0069] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0070] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0071] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of 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.

[0072] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which 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 or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description created by the present application, unless otherwise specified, "multiple" means two or more.

[0073] In the description of the present invention, it should be noted that, 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 it can be indirectly connected 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.

[0074] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0075] See also Figure 1-4 , Figure 1 A top view of a device for reducing the specific surface area of ​​graphite provided in an embodiment of the present application; Figure 2 A front view of a device for reducing the specific surface area of ​​graphite is provided for an embodiment of the present application; Figure 3 A left view of a device for reducing the specific surface area of ​​graphite is provided for an embodiment of the present application; Figure 4 A right view of a device for reducing the specific surface area of ​​graphite is provided for an embodiment of the present application.

[0076] like Figure 1-4 As shown, an embodiment of the present application provides a device for reducing the specific surface area of ​​graphite, comprising a solution tank 1, a stirring tank 2, a filter press 3 and a dispersing device;

[0077] The solution tank 1 stores and delivers the solution to the stirring tank 2 through the solution transmission component 4. The stirring tank 2 is used to add graphite and stir and mix the graphite and the solution to form a mixed solution.

[0078] The stirring tank 2 is provided with a reflux pipe 5 connected with the solution tank 1. One end of the reflux pipe 5 extends into the stirring tank 2 to extract the upper solution in the stirring tank 2. The upper solution is the solution located at the upper layer after the mixed solution is left to stand without being fully mixed with the graphite.

[0079] The reflux pipe 5 is connected to a filtering device 53 for filtering graphite.

[0080] After the standing is completed, the upper layer solution flows back into the solution tank 1 through the reflux pipe 5 after being filtered by the filter device 53;

[0081] The mixing tank 2 delivers the mixed solution to the filter press 3 through the mixed solution transmission component 64. The filter press 3 is used to add pure water and wash the solution off the graphite. The filter press 3 is also used to compact the graphite to form graphite blocks.

[0082] The breaking device is connected to the filter press, and the graphite blocks compacted by the filter press are placed in the breaking device for drying and then broken up.

[0083] After the graphite and the solution are mixed and then compressed, the graphite is fused in the solution to form a mixed solution, and the distribution of the graphite molecules is more uniform. At the same time, this compression method reduces the specific surface area of ​​the graphite, and the charge and discharge performance of the lithium battery using graphite is better. Furthermore, in actual production, in order to make the graphite fully dissolved in the solution, an excess amount of solution is generally added, which will cause waste of the solution, increase the subsequent cleaning time of the graphite, and reduce the processing efficiency. In the embodiment of the present application, the mixed solution is first allowed to stand. Since the density of graphite is greater than that of the solution, after standing, the mixed solution is divided into three layers. The graphite and the solution in the bottom layer are fully mixed, the graphite in the middle layer is not fully mixed with the solution, and the top layer is a solution mixed with very little graphite. Therefore, in the embodiment of the present application, the upper layer of graphite is extracted from the stirring tank 2 through the reflux pipe 5, the graphite is removed by filtration, and then added to the solution pipe 43 for multiple use, thereby realizing the recovery and multiple use of the solution, reducing the waste of the solution, and improving the processing efficiency.

[0084] Specifically, it is necessary to control the amount of solution added through the solution transmission component 4, and add graphite according to a fixed ratio.

[0085] Specifically, a stirring structure is provided in the stirring tank 2, and the stirring structure is used to fully stir the graphite and the solution so that the graphite and the solution are mixed to form a mixed solution.

[0086] Specifically, in order to ensure that the upper layer of solution is extracted, the water inlet of the reflux pipe 5 should be lowered as the liquid level drops, so that the solution in the upper layer of the stirring tank 2 is always extracted.

[0087] In one embodiment, the reflux pipe 5 can be set as a transparent pipe, and the operator can see the color of the liquid in the reflux pipe 5 through the transparent pipe. When a large amount of graphite appears in the reflux pipe 5, it means that the upper solution has been extracted, and the reflux pipe 5 located at the upper layer of the solution begins to extract the middle solution or the lower solution. Because the graphite content of these two layers of solution is high, the operator can see the change in the color of the liquid in the reflux pipe 5. When the graphite content in the liquid is high to a certain extent, the staff closes the reflux pipe 5 and stops extracting the solution. By manually controlling the extraction of the upper solution, the extraction amount can be judged more freely, and the extracted graphite can be minimized.

[0088] In one embodiment, the stirring tank 2 and the solution tank 1 are both lifted off the ground by a bracket;

[0089] The solution transmission component 4 includes a solution outlet 41 disposed at the bottom of the solution tank 1, a solution addition port 42 disposed at the top of the stirring tank 2, a solution pipe 43 connecting the solution outlet 41 and the solution addition port 42, and a first water pump 44 for pumping the solution;

[0090] The first water pump 44 is disposed on the solution pipe 43 and close to the solution outlet 41 , and pumps the solution from the solution tank 1 into the stirring tank 2 .

[0091] Specifically, the stirring tank 2 and the solution tank 1 are both lifted to a certain height from the ground by a bracket, and this height should be able to install a liquid outlet so that the liquid in the stirring tank 2 and the solution tank 1 can flow out from the bottom.

[0092] In one embodiment, the bracket on the stirring tank 2 is fixed to the side wall of the stirring tank 2 to support the stirring tank 2 from the side, and an operating platform 8 is arranged above the bracket around the stirring tank 2;

[0093] The stirring tank 2 is also provided with a feeding port for adding graphite;

[0094] The height of the operating platform 8 is close to the top of the mixing tank 2, and a ladder is provided on the operating platform 8 to go up and down the operating platform 8;

[0095] The filtering device 53 is disposed on the operating platform 8 .

[0096] Because the stirring tank 2 is generally high, the operator can climb onto the operating platform 8 via a ladder and add graphite to the stirring tank 2 on the operating platform 8. After the standing is completed, the operator climbs onto the operating platform 8 again, extracts the upper solution through the reflux pipe 5, and determines whether the upper solution is completely extracted.

[0097] A reflux port 51 is provided on the top of the stirring tank 2, and a reflux pipe interface is provided on the solution pipe 43. One end of the reflux pipe 5 extends into the stirring tank 2 through the reflux port 51, and the other end of the reflux pipe 5 is connected to the reflux pipe interface 52;

[0098] The return pipe 5 includes a first part, a second part and a third part.

[0099] One end of the first part extends into the mixing tank 2, and the other end is connected to the second water pump. The first part is configured as a transparent hose;

[0100] One end of the second part is connected to the second water pump, and the other end is provided with a filter device 53;

[0101] One end of the third part is connected to the filtering device 53, and the other end is connected to the solution tank 1 through the reflux inlet.

[0102] Part of the reflux pipe 5 is set to be transparent, so that the color of the extracted solution can be seen through this part of the hose, and the second water pump 54 can be stopped in time to reduce the amount of graphite extracted. The other parts of the reflux pipe 5 use non-transparent pipes to reduce the cost of materials. The second water pump is set close to the stirring tank 2 to make it easier to extract the solution.

[0103] In one embodiment, the mixed solution transmission component 64 includes a mixed solution outlet 6141 disposed at the bottom of the stirring tank 2, a mixed solution pipe 6243 connecting the mixed solution outlet 6141 and the filter press 3, and a third pump 63 for pumping the mixed solution;

[0104] The third water pump 63 pumps the mixed solution from the stirring tank 2 into the filter press 3 .

[0105] In one embodiment, the apparatus for reducing the specific surface area of ​​graphite further comprises a pure water tank 7 for providing pure water to the filter press 3;

[0106] The pure water tank 7 is also provided with a pure water interface, and the fourth water pump 71 pumps the pure water into the filter press 3 through the pure water interface.

[0107] Pure water is stored in the pure water tank 7 in advance. When needed, the pure water is pumped into the filter press 3 through the fourth water pump 71 to rinse the graphite and wash away the solution in the graphite. The graphite is then compressed to reduce the specific surface area of ​​the graphite and squeeze out the water in the graphite to form graphite blocks.

[0108] See also Figure 5 , Figure 5 A detailed diagram of a pumping head 55 of an apparatus for reducing the specific surface area of ​​graphite is provided for an embodiment of the present application.

[0109] like Figure 5As shown, in some embodiments, a pumping head 55 is provided at one end of the reflux pipe 5 disposed in the mixing tank 2; the pumping head 55 includes a pumping structure 551, a floating structure 552 and a guide plate 553;

[0110] The upper part of the extraction structure 551 is connected to the return pipe 5, the bottom is closed, and a plurality of water extraction ports connected to the return pipe 5 are arranged along the side wall;

[0111] The floating structure 552 provides buoyancy for the pumping head 55 and is disposed above the pumping port;

[0112] The guide plate 553 is divided into a bottom plate and a side plate. The bottom plate is slightly larger than the bottom surface of the extraction structure 551 and is arranged at the bottom of the extraction structure 551. The side plate is arranged around the side wall of the extraction structure 551. The lower end of the side plate is arranged on the bottom plate, and the upper end extends to cover the water pumping port. The guide plate 553 guides the solution to flow into the water pumping port from above along the gap between the side plate and the extraction structure 551.

[0113] The solution passes through the gap between the guide plate 553 and the extraction structure 551, and the solution is extracted from above the extraction structure 551, which can reduce the disturbance of the solution during the extraction process and reduce the amount of extracted graphite.

[0114] The influence of the gravity of the solution in the reflux pipe 5 on the pumping head 55 should be reduced. Specifically, if the reflux pipe 5 is located above the pumping head 55 during the pumping process, the gravity of the reflux pipe 5 will press on the pumping head 55, which requires a high buoyancy of the floating structure 552 in the pumping head 55. It is not easy to use a larger reflux pipe 5, so the efficiency is low.

[0115] Therefore, in some embodiments, the reflux pipe 5 penetrates into the stirring tank 2 from the bottom of the stirring tank 2, and the reflux pipe 5 rises and falls in the stirring tank 2 along with the rise and fall of the pumping head 55;

[0116] A sealing assembly is provided at the position where the reflux pipe 5 passes through the stirring tank 2;

[0117] The sealing assembly includes a bellows sleeved on the return pipe and a sealing flange connecting the bellows and the return pipe;

[0118] The upper end of the bellows is fixed to the pumping head 55 through a sealing flange, and the lower end of the bellows is fixed to the inner wall of the stirring tank 2 through a sealing flange.

[0119] In this way, the reflux tube 5 is located below the liquid surface, and water can provide buoyancy for the solution tube 5 , so a wider solution tube 5 can be used, and the reflux efficiency is higher.

[0120] In some embodiments, the solution is a K12 solution.

[0121] Specifically, during operation, the operator turns on the first water pump 44 to extract the solution from the solution tank 1 and injects it into the stirring tank 2. After reaching a predetermined amount, the first water pump 44 is turned off. The operator climbs onto the operating platform 8 to add a certain amount of graphite into the stirring tank 2. After the operator descends from the operating platform 8, the stirring tank 2 starts to stir and mix the graphite and the solution. After the stirring is completed, the mixed solution is allowed to stand in the stirring tank 2 for a period of time, and then the reflux pipe 5 is extended from the reflux port 51 into the stirring tank 2, and the upper layer of solution is extracted from the stirring tank 2 and filtered and then pumped back into the solution tank 1 to achieve the solution. For multiple uses, when the operator sees the graphite being drawn into the reflux pipe 5 through the transparent reflux pipe 5, the second pump 54 is turned off, and then the third pump 63 is turned on to extract the mixed solution from the bottom of the stirring tank 2, and add it to the filter press 3 through the mixed solution pipe 6243, and then pure water is filled from the pure water tank 7 to clean the graphite. After cleaning, the graphite is filtered to squeeze out most of the water, and the graphite is dried after filtering to complete the compression of the graphite. Finally, the compacted graphite is placed in a disintegrating device for drying, and then dispersed to obtain graphite with a low specific surface area.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for reducing the specific surface area of ​​graphite, characterized in that: It comprises a stirring tank, wherein the stirring tank is provided with a stirring component and a reflux component; The stirring component is used to stir and mix graphite and a solution, and the solution is a dispersant solution; The solution and the graphite are stirred in the stirring tank to form a mixed solution; The reflux component is used to extract and recover the solution that is not fully mixed with the graphite in the stirring tank after the mixed solution is left to stand; The device for reducing the specific surface area of ​​graphite also includes a filter press for processing the mixed solution, the filter press includes a cleaning component and a filter press component, the cleaning component cleans the graphite with pure water, and the filter press component is used to compress the graphite to form a graphite block; The filter press is also connected to a dispersing device, and the graphite blocks compacted by the filter press are placed in the dispersing device for drying and then dispersed; The reflux assembly includes a reflux pipe, a pumping head arranged at one end of the reflux pipe, and a filtering device for filtering the solution in the reflux pipe; One end of the reflux pipe with the pumping head extends into the stirring tank to extract the upper solution in the stirring tank, wherein the upper solution is the solution located in the upper layer after the mixed solution is left to stand without being fully mixed with the graphite; The pumping head rises and falls with the liquid level of the solution in the stirring tank to extract the upper layer of solution.

2. A device for reducing the specific surface area of ​​graphite according to claim 1, characterized in that: Also includes a solution tank for storing and providing the solution, The solution tank is lifted off the ground by a bracket, and the solution tank delivers the solution to the stirring tank through a solution transmission component. The solution transmission component includes a solution outlet arranged at the bottom of the solution tank, a solution addition port arranged at the top of the stirring tank, a solution pipe connecting the solution outlet and the solution addition port, and a first water pump for pumping the solution; The first water pump is arranged on the solution pipe and close to the solution outlet, and pumps the solution from the solution tank into the stirring tank.

3. A device for reducing the specific surface area of ​​graphite as claimed in claim 2, characterized in that: A reflux port is provided on the top of the stirring tank, a reflux pipe interface is provided on the solution tank, one end of the reflux pipe extends into the stirring tank through the reflux port, and the other end of the reflux pipe is connected to the solution tank through the reflux pipe interface; The reflux pipe is configured as a transparent pipe, and the second water pump extracts the solution through the reflux pipe.

4. The device for reducing the specific surface area of ​​graphite according to claim 2, characterized in that: The pumping head comprises a pumping structure, a floating structure and a guide plate; The upper part of the extraction structure is connected to the return pipe, the bottom is closed, and a plurality of water extraction ports connected to the return pipe are arranged along the side wall; The floating structure provides buoyancy for the pumping head and is arranged above the pumping port; The guide plate is divided into a bottom plate and a side plate. The bottom plate is slightly larger than the bottom surface of the extraction structure and is arranged at the bottom of the extraction structure. The side plate is arranged around the side wall of the extraction structure. The lower end of the side plate is arranged on the bottom plate, and the upper end extends to cover the water pumping port. The guide plate guides the solution to flow into the water pumping port from above along the gap between the side plate and the extraction structure.

5. The device for reducing the specific surface area of ​​graphite according to claim 1, characterized in that: The reflux pipe penetrates into the stirring tank from the bottom of the stirring tank, and the reflux pipe rises and falls in the stirring tank along with the rise and fall of the pumping head; A sealing assembly is provided at the position where the reflux pipe passes through the stirring tank; The sealing assembly comprises a bellows sleeved on the return pipe and a sealing flange connecting the bellows and the return pipe; The upper end of the bellows is fixed to the pumping head through a sealing flange, and the lower end of the bellows is fixed to the inner wall of the stirring tank through a sealing flange.

6. The device for reducing the specific surface area of ​​graphite according to claim 1, characterized in that: The stirring tank is connected to the filter press via a mixed solution transmission component; The mixed solution transmission component includes a mixed solution outlet arranged at the bottom of the stirring tank, a mixed solution pipe connecting the mixed solution outlet and the filter press, and a third water pump for pumping the mixed solution; The third water pump pumps the mixed solution from the stirring tank into the filter press.

7. The device for reducing the specific surface area of ​​graphite according to claim 1, characterized in that: Also included is a pure water tank for providing pure water to the filter press; The pure water tank is also provided with a pure water interface, and the fourth water pump pumps the pure water into the filter press through the pure water interface.

8. The device for reducing the specific surface area of ​​graphite according to claim 1, characterized in that: Also includes an operating platform arranged around the stirring tank; The stirring tank is also provided with a feeding port for adding graphite; The height of the operating platform is close to the top of the mixing tank, and a ladder for going up and down the operating platform is arranged on the operating platform; The filtering device is arranged on the operating platform.

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