Graphitization furnace and heat treatment system
By designing a parallel electric field and sub-channel structure in the graphitization furnace, the problem of uneven heating caused by uneven electric field distribution was solved, achieving uniform graphitization of materials and improving product consistency, while extending the service life of the electrodes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-03-03
AI Technical Summary
The uneven distribution of internal electric field current density in existing graphitization furnaces leads to uneven heating of materials and poor product consistency.
Design a graphitization furnace that uses a first electrode and a second electrode with opposite polarities to form a parallel electric field in the feeding channel, so that the material is heated uniformly as it passes through the feeding channel. Multiple sub-channels are used to separate the material and heat it in the parallel electric field, and the current density and heating time are controlled.
This process achieves uniform graphitization of materials, improves product consistency and graphitization level, and extends electrode lifespan.
Smart Images
Figure CN223965874U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of graphitization technology, and in particular to a graphitization furnace and heat treatment system. Background Technology
[0002] The carbon atoms in carbonaceous materials are arranged irregularly. Only through high-temperature heat treatment, causing the carbon atoms to recrystallize and rearrange in an ordered manner, can the crystalline structure of graphite be presented. This results in graphite possessing many of its excellent properties, such as significantly improved electrical and thermal conductivity, better chemical and thermal stability, reduced impurities, lower hardness, and easier machining. The function of a graphitization furnace is to transform carbonaceous materials into artificial graphite materials, enabling their better application in industrial manufacturing.
[0003] However, in the current graphitization furnace, the current density distribution of the internal electric field is relatively dispersed during use, which makes it difficult to heat the material in a concentrated manner. Furthermore, the electric field distribution area is not concentrated, resulting in incomplete graphitization of the material and poor product consistency. Utility Model Content
[0004] Therefore, it is necessary to provide a graphitization furnace and heat treatment system to address the problems that the current density distribution of the internal electric field in the current graphitization furnace is relatively dispersed, which makes it difficult to concentrate the heating of materials, and the non-concentrated electric field distribution area leads to incomplete graphitization of materials and poor product consistency.
[0005] In a first aspect, this application provides a graphitization furnace, including a furnace body and a first electrode and a second electrode with opposite polarities. The furnace body has a reaction chamber, and a feed inlet communicating with the reaction chamber is provided on the furnace body along a first direction. The first electrode and the second electrode are respectively disposed through the furnace body along a second direction intersecting the first direction, and each has one end located in the reaction chamber. In the plane intersecting the first direction, the end of the first electrode located in the reaction chamber and the end of the second electrode located in the reaction chamber are spaced apart from each other to form a feeding channel communicating with the reaction chamber.
[0006] With the above structure, the material can pass evenly through the feeding channel between the first and second electrodes, and during its passage through the feeding channel, it is uniformly heated by a parallel electric field, making the graphitization of the material more uniform. Furthermore, all materials can pass through the feeding channel sequentially and be uniformly heated within the channel, resulting in a more thorough graphitization and improved product consistency.
[0007] According to one or more embodiments, the first electrode has a first insertion end and a first connection end that are connected to each other, and the second electrode has a second insertion end and a second connection end that are connected to each other. The first connection end and the second connection end are both used for electrical connection with an external device. The first insertion end and the second insertion end are both located in the reaction chamber, and the two are spaced apart from each other along the second direction and / or the third direction to form a feeding channel; wherein the first direction, the second direction and the third direction are perpendicular to each other.
[0008] Therefore, a parallel electric field parallel to the horizontal plane can be formed between the first insertion end and the second insertion end, so that the material can be heated evenly as it passes through the feeding channel, thus improving the consistency of the product.
[0009] According to one or more embodiments, the first insertion end includes at least two first sub-parts, and the second insertion end includes at least two second sub-parts. Each first sub-part and each second sub-part are alternately arranged along a third direction, and a first sub-channel is formed between each pair of adjacent first sub-parts and second sub-parts. In a second direction, a second sub-channel is formed between each first sub-part and the second connecting end, and between each second sub-part and the first connecting end. The first sub-channel and the second sub-channel together form a feeding channel.
[0010] The above structure allows for the formation of a parallel electric field between the first and second electrodes, enabling uniform heating of the material passing through the feeding channel. Secondly, multiple first and second sub-channels separate the material, allowing it to disperse and pass through the corresponding first or second sub-channel, where it is then uniformly heated in the corresponding parallel electric field. This ensures more thorough heating and improves product consistency.
[0011] According to one or more embodiments, in the third direction, the ratio between the sum of the widths of each first sub-part and the width of the first connecting end is in the range of 1:1 to 1:5; and / or, in the third direction, the ratio between the sum of the widths of each second sub-part and the width of the second connecting end is in the range of 1:1 to 1:5.
[0012] Based on this, by setting the ratio between the sum of the widths of each first sub-part and the width of the first connection end to the aforementioned range, and by setting the ratio between the sum of the widths of each second sub-part and the width of the second connection end to the aforementioned range, the current density through the first electrode and the second electrode can be better controlled, thereby improving the strength of the first electrode and the second electrode.
[0013] According to one or more embodiments, in the third direction, the ratio between the sum of the widths of each first sub-part and the width of the first connecting end is in the range of 1:1 to 1:2; and / or, in the third direction, the ratio between the sum of the widths of each second sub-part and the width of the second connecting end is in the range of 1:1 to 1:2. This further improves the strength of the first electrode and the second electrode.
[0014] According to one or more embodiments, in the third direction, the ratio of the sum of the widths of each first sub-part to the sum of the widths of each first sub-channel is in the range of 1:1 to 1:1.8; and / or, in the third direction, the ratio of the sum of the widths of each second sub-part to the sum of the widths of each first sub-channel is in the range of 1:1 to 1:1.8.
[0015] Based on this, by setting the ratio of the sum of the widths of each first sub-part to the sum of the widths of each first sub-channel to the above range, and by setting the ratio of the sum of the widths of each second sub-part to the sum of the widths of each first sub-channel to the above range, it is possible to better control the speed at which the material passes through the feeding channel and the current density on the first and second electrodes, so that the graphitization of the material in the feeding channel is more uniform.
[0016] According to one or more embodiments, in the third direction, the ratio of the sum of the widths of each first sub-part to the sum of the widths of each first sub-channel ranges from 1:1 to 1:1.4; and / or, in the third direction, the ratio of the sum of the widths of each second sub-part to the sum of the widths of each first sub-channel ranges from 1:1 to 1:1.4. This further improves the uniformity of graphitization of the material during its passage through the feeding channel.
[0017] According to one or more embodiments, in a third-party direction, the widths of each first sub-part and each second sub-part are equal.
[0018] This makes the current density between the first electrode and the second electrode more uniform, improving the uniformity of graphitization of the material.
[0019] According to one or more embodiments, in the first direction, the ratio between the height of the first electrode and / or the second electrode and the height of the reaction chamber ranges from 1:4 to 1:10.
[0020] Therefore, by setting the ratio between the height of the first electrode and / or the second electrode and the height of the reaction chamber to the range mentioned above, the residence time of the material in the feeding channel can be better controlled, so that the material can be fully graphitized.
[0021] According to one or more embodiments, in the first direction, the ratio between the height of the first electrode and / or the second electrode and the height of the reaction chamber ranges from 1:6 to 1:9. This allows for better control of the material's residence time in the feeding channel, further improving the degree of graphitization of the material.
[0022] According to one or more embodiments, the ratio between the width of the first electrode and / or the second electrode along a third direction and the height of the first electrode and / or the second electrode along a first direction ranges from 1:1.5 to 1:8.
[0023] Therefore, the above range enables the strength of the first and second electrodes to meet production requirements and extends the service life of the graphitization furnace.
[0024] According to one or more embodiments, the ratio between the width of the first electrode and / or the second electrode along a third direction and the height of the first electrode and / or the second electrode along a first direction ranges from 1:2 to 1:4. This further improves the strength of the first and second electrodes and extends the service life of the graphitization furnace.
[0025] According to one or more embodiments, the furnace body is further provided with a discharge port communicating with the reaction chamber, and the discharge port and the inlet are respectively located on opposite sides of the reaction chamber along the first direction; the graphitization furnace also includes a cooling component, which is communicated with the discharge port.
[0026] The above structure connects the cooling component to the discharge port, allowing the material to smoothly enter the cooling component after being discharged from the discharge port, and the cooling component is used to cool the graphitized material.
[0027] Secondly, this application also provides a heat treatment system, including the graphitization furnace described above.
[0028] In the graphitization furnace and heat treatment system described above, a parallel electric field can be formed between the first electrode and the second electrode in the feeding channel. As the material in the reaction chamber passes through the feeding channel, it can be uniformly heated under the action of the parallel electric field, so that the material can be graphitized more uniformly and the consistency of the product can be improved. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the overall structure of a graphitization furnace according to one or more embodiments.
[0030] Figure 2 This is a cross-sectional view of a graphitization furnace according to one or more embodiments.
[0031] Figure 3 for Figure 2 Sectional view along line AA.
[0032] Figure 4 This is a schematic diagram of the structure of the first electrode and the second electrode in a graphitization furnace according to one or more embodiments.
[0033] Explanation of reference numerals in the attached drawings: 100, graphitization furnace; 10, furnace body; 20, first electrode; 30, second electrode; 11, reaction chamber; 12, feed inlet; 13, discharge channel; 14, discharge outlet; 21, first insertion end; 22, first connection end; 31, second insertion end; 32, second connection end; 131, first sub-channel; 132, second sub-channel; 211, first sub-section; 311, second sub-section; a, first direction; b, second direction; c, third direction; 2, hopper; 3, material pipe; 4, material shut-off valve; 5, DC transformer. Detailed Implementation
[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0035] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0036] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0038] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0039] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0040] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields. With the continuous expansion of battery applications, market demand is also constantly increasing.
[0041] Carbonaceous materials are a key component of battery structures. The carbon atoms in these materials are irregularly arranged; only through high-temperature heat treatment, causing recrystallization and a rearrangement of the carbon atoms, can they exhibit the crystalline structure of graphite, thus acquiring graphite's excellent electrical and thermal conductivity, as well as its chemical and thermal stability. Therefore, carbonaceous materials need to be converted into artificial graphite materials using a graphitization furnace, enabling their application in the production of battery anode materials.
[0042] In other words, a key step in the production process of carbon anode materials is graphitization. Graphitization refers to the transformation of carbon atoms from a random, irregular arrangement to a regularly arranged hexagonal planar network structure, i.e., graphite microcrystalline structure, at high temperatures. The purpose is to obtain graphite's high electrical and thermal conductivity, corrosion resistance, and abrasion resistance. During graphitization, the higher the temperature, the more complete the development of the graphite microcrystalline structure, thus increasing the degree of graphitization. The equipment used to complete graphitization is the graphitization furnace.
[0043] In current graphitization furnace structures, an umbrella-shaped or cone-shaped electric field is typically formed inside the furnace body to graphitize the material after it passes through this field. However, due to the low density and dispersed distribution of this electric field, not all the material can pass through the core heating zone, resulting in incomplete graphitization and poor product consistency.
[0044] Based on the above considerations, in order to solve the problems that the current density distribution of the internal electric field in the current graphitization furnace is relatively dispersed, which is not convenient for concentrated heating of materials, and the electric field distribution area is not concentrated, resulting in incomplete graphitization of materials and poor product consistency, one or more embodiments of this application provide a graphitization furnace in which a parallel electric field can be formed between the first electrode and the second electrode in the feeding channel. As the material in the reaction chamber passes through the feeding channel, it can be uniformly heated under the action of the parallel electric field, so that the material can be graphitized more uniformly and the product consistency can be improved.
[0045] See Figure 1 The graphitization furnace 100 is vertically arranged and mainly includes a furnace body 10 and various functional units disposed on the furnace body 10. Specifically, the graphitization furnace 100 may include a feeding unit, a DC power supply unit, and a cooling and discharging unit.
[0046] The feeding unit mainly includes a hopper 2 and a feed pipe 3. The hopper 2 is located above the furnace body 10 and is connected to the feed inlet 12 on the furnace body 10 via the feed pipe 3. Optionally, a material shut-off valve 4 can be installed at the connection between the hopper 2 and the feed pipe 3 to control the flow of material in the material channel.
[0047] Furthermore, the material entering the graphitization furnace 100 is a graphitizable carbonaceous material, such as petroleum coke, coal coke, and asphalt. After entering the graphitization furnace 100, the material undergoes four stages: preheating, calcination, graphitization, and cooling to complete the graphitization process and obtain the negative electrode material product. Volatile exhaust gas is released during the process.
[0048] The DC power supply unit may include a first electrode 20, a second electrode 30, and a DC transformer 5. One of the first electrode 20 and the second electrode 30 may be a positive electrode, and the other a negative electrode. The DC transformer 5 supplies power to the furnace body 10. The positive and negative electrodes can apply voltage to the material passing between them. DC current flows from the positive terminal of the DC transformer 5 through the material, which releases Joule heat due to its own resistance, maintaining the furnace core temperature above 3000℃, thus creating a stable temperature field between the positive and negative electrodes. The current flowing through the material returns from the negative electrode to the negative terminal of the DC transformer 5, forming a current flow loop.
[0049] It should be noted that the positive and negative electrodes can be graphite electrodes.
[0050] The cooling discharge unit is mainly used to cool the graphitized material. Therefore, the cooling discharge unit is connected to the discharge port 14 of the furnace body 10 so that the graphitized material can smoothly enter the cooling discharge unit from the discharge port 14 so as to output the graphitized material.
[0051] like Figure 2 , Figure 3 as well as Figure 4 As shown, one embodiment of this application provides a graphitization furnace 100, including a furnace body 10 and a first electrode 20 and a second electrode 30 with opposite polarities. The furnace body 10 has a reaction chamber 11, and a feed inlet 12 communicating with the reaction chamber 11 is opened on the furnace body 10 along a first direction a. The first electrode 20 and the second electrode 30 are respectively disposed through the furnace body 10 along a second direction b intersecting the first direction a, and each has one end located in the reaction chamber 11. Wherein, in the plane intersecting the first direction a, the end of the first electrode 20 located in the reaction chamber 11 and the end of the second electrode 30 located in the reaction chamber 11 are spaced apart from each other to form a feeding channel 13 communicating with the reaction chamber 11.
[0052] It should be noted that the graphitization furnace 100 refers to a device capable of heating carbonaceous materials, causing the randomly arranged carbon atoms to rearrange in an orderly manner, presenting the crystalline structure of graphite. The furnace body 10 is the main part of the graphitization furnace 100. The interior of the furnace body 10 is hollow to form a reaction chamber 11, which can accommodate materials and provide reaction space for the materials.
[0053] The furnace body 10 is also provided with a feed inlet 12, which can be located above the furnace body 10 and communicate with the reaction chamber 11. In this way, when material is put in through the feed inlet 12, the material can fall into the reaction chamber 11 under the action of gravity.
[0054] When the feed inlet 12 is located above the furnace body 10, the first direction a is the vertical direction, and the feed inlet 12 is located in the vertical direction.
[0055] Furthermore, the second direction b is perpendicular to the first direction a, that is, the second direction b can be set as the first horizontal direction.
[0056] The first electrode 20 and the second electrode 30 have opposite polarities. When the first electrode 20 is set as a positive electrode, the second electrode 30 is a negative electrode, and vice versa.
[0057] The first electrode 20 and the second electrode 30 are both disposed through the furnace body 10 along a first horizontal direction, and each has one end located inside the reaction chamber 11. Specifically, the first electrode 20 can penetrate the furnace body 10 from left to right, and the rightmost end of the first electrode 20 is located inside the reaction chamber 11. The second electrode 30 can penetrate the furnace body 10 from right to left, and the leftmost end of the second electrode 30 is located inside the reaction chamber 11.
[0058] Furthermore, the rightmost end of the first electrode 20 and the leftmost end of the second electrode 30 are spaced apart in the horizontal plane, that is, the rightmost end of the first electrode 20 and the leftmost end of the second electrode 30 are spaced apart along the first horizontal direction and / or the second horizontal direction, and the first horizontal direction and the second horizontal direction are perpendicular to each other.
[0059] Thus, a feeding channel 13 communicating with the reaction chamber 11 is formed between the rightmost end of the first electrode 20 and the leftmost end of the second electrode 30, and a horizontal parallel electric field is formed inside the feeding channel 13.
[0060] The material is fed into the reaction chamber 11 through the feed inlet 12. The material slowly falls within the reaction chamber 11 and passes through the discharge channel 13. During its passage through the discharge channel 13, the material is uniformly heated under the influence of a parallel electric field, resulting in more uniform graphitization. Furthermore, all the material passes through the discharge channel 13 sequentially and is uniformly heated within it, ensuring more thorough graphitization and improving product consistency.
[0061] With the above structure, the material can pass evenly through the feeding channel 13 between the first electrode 20 and the second electrode 30, and during the process of passing through the feeding channel 13, it is uniformly heated by the parallel electric field, making the graphitization of the material more uniform. In addition, all the material can pass through the feeding channel 13 sequentially and be uniformly heated within the feeding channel 13, making the graphitization of the material more thorough and improving the consistency of the product.
[0062] In some embodiments, the first electrode 20 has a first insertion end 21 and a first connection end 22 connected to each other, and the second electrode 30 has a second insertion end 31 and a second connection end 32 connected to each other. Both the first connection end 22 and the second connection end 32 are used for electrical connection with an external device. Both the first insertion end 21 and the second insertion end 31 are located inside the reaction chamber 11, and they are spaced apart from each other along the second direction b and / or the third direction c to form a feeding channel 13. The first direction a, the second direction b, and the third direction c are perpendicular to each other.
[0063] Specifically, the first direction a is the vertical direction, the second direction b is the first horizontal direction, and the third direction c is the second horizontal direction. The first direction a, the second direction b, and the third direction c are perpendicular to each other.
[0064] The first electrode 20 has a first insertion end 21 and a first connection end 22 arranged opposite to each other in the first horizontal direction. The first insertion end 21 is inserted into the reaction chamber 11 along the first horizontal direction, and the first connection end 22 penetrates through the furnace body 10. It can not only support the first insertion end 21, but also be used to connect with an external device, such as a DC transformer 5, to form a current loop.
[0065] Similarly, the second electrode 30 has a second insertion end 31 and a second connection end 32 arranged opposite to each other in the first horizontal direction. The second insertion end 31 is inserted into the reaction chamber 11 along the first horizontal direction, and the second connection end 32 penetrates through the furnace body 10. It can not only support the second insertion end 31, but also be used to connect with an external device, such as a DC transformer 5, to form a current loop.
[0066] Furthermore, the first insertion end 21 and the second insertion end 31 are respectively spaced apart along the first horizontal direction and the second horizontal direction, so that the gap between them forms a feeding channel 13.
[0067] Therefore, a parallel electric field parallel to the horizontal plane can be formed between the first insertion end 21 and the second insertion end 31, so that the material can be heated evenly as it passes through the feeding channel 13, thereby improving the consistency of the product.
[0068] In some embodiments, the first insertion end 21 includes at least two first sub-parts 211, and the second insertion end 31 includes at least two second sub-parts 311. Each first sub-part 211 and each second sub-part 311 are alternately arranged along a third direction c, and a first sub-channel 131 is formed between each pair of adjacent first sub-parts 211 and second sub-parts 311. In the second direction b, second sub-channels 132 are formed between each first sub-part 211 and the second connecting end 32, and between each second sub-part 311 and the first connecting end 22, respectively. The first sub-channels 131 and the second sub-channels 132 together form a discharge channel 13.
[0069] Specifically, the first sub-part 211 can be configured as a tooth protruding along a first horizontal direction, with each tooth connected to the first connecting end 22. Similarly, the second sub-part 311 can also be configured as a tooth protruding along a first horizontal direction, with each tooth connected to the second connecting end 32. The first sub-parts 211 and the second sub-parts 311 are alternately arranged so that each first sub-part 211 can be inserted into the gap between two adjacent second sub-parts 311 along the first horizontal direction, and each second sub-part 311 can be inserted into the gap between two adjacent first sub-parts 211 along the first horizontal direction.
[0070] Furthermore, in the first horizontal direction, each first sub-part 211 is spaced apart from the second connecting end 32, and each second sub-part 311 is spaced apart from the first connecting end 22. That is, the first electrode 20 and the second electrode 30 are spaced apart in the first horizontal direction, and a second sub-channel 132 is formed between them. In this way, a parallel electric field can be smoothly formed between the first electrode 20 and the second electrode 30.
[0071] In this configuration, each pair of adjacent first sub-sections 211 and second sub-sections 311 forms a first sub-channel 131, which, together with the second sub-channel 132, forms a feeding channel 13. Therefore, the feeding channel 13 simultaneously contains a parallel electric field along a first horizontal direction and a parallel electric field along a second horizontal direction.
[0072] Through the above structure, a parallel electric field can be smoothly formed between the first electrode 20 and the second electrode 30, so as to uniformly heat the material passing through the feeding channel 13. Secondly, multiple first sub-channels 131 and multiple second sub-channels 132 separate the material, so that the material can be dispersed and pass through the corresponding first sub-channel 131 or second sub-channel 132, and then be uniformly heated in the corresponding parallel electric field, so that the material is heated more thoroughly and the consistency of the product is improved.
[0073] In some embodiments, on the third direction c, the ratio between the sum of the widths D1 of each first sub-part 211 and the width D2 of the first connecting end 22 ranges from 1:1 to 1:5. And / or, on the third direction c, the ratio between the sum of the widths D3 of each second sub-part 311 and the width D4 of the second connecting end 32 ranges from 1:1 to 1:5.
[0074] It should be noted that, in the second horizontal direction, the widths of the first sub-parts 211 may be equal or unequal. Similarly, in the second horizontal direction, the widths of the second sub-parts 311 may be equal or unequal.
[0075] As a specific embodiment, in the third direction c, the ratio between the sum of the widths D1 of each first sub-part 211 and the width D2 of the first connecting end 22 can be, but is not limited to, set to 1:1, 1:2, 1:3, 1:4, or 1:5. In the third direction c, the ratio between the sum of the widths D3 of each second sub-part 311 and the width D4 of the second connecting end 32 can be, but is not limited to, set to 1:1, 1:2, 1:3, 1:4, or 1:5. Different ratios between the sum of the widths D1 of each first sub-part 211 and the width D2 of the first connecting end 22 result in different current densities through the first electrode 20; different ratios between the sum of the widths D3 of each second sub-part 311 and the width D4 of the second connecting end 32 result in different current densities through the second electrode 30.
[0076] In other words, in the second horizontal direction, the ratio between the sum of the widths of each first sub-part 211 and the width of the first connecting end 22 will affect the current density through the first electrode 20, thereby affecting the strength of the first electrode 20. Similarly, in the second horizontal direction, the ratio between the sum of the widths of each second sub-part 311 and the width of the second connecting end 32 will affect the current density through the second electrode 30, thereby affecting the strength of the second electrode 30.
[0077] Based on this, by setting the ratio between the sum of the widths of each first sub-part 211 and the width of the first connecting end 22 to the range described above, and by setting the ratio between the sum of the widths of each second sub-part 311 and the width of the second connecting end 32 to the range described above, the current density through the first electrode 20 and the second electrode 30 can be better controlled, thereby improving the strength of the first electrode 20 and the second electrode 30.
[0078] Furthermore, in the third direction c, the ratio between the sum of the widths of each first sub-part 211 and the width of the first connecting end 22 ranges from 1:1 to 1:2. And / or, in the third direction c, the ratio between the sum of the widths of each second sub-part 311 and the width of the second connecting end 32 ranges from 1:1 to 1:2. This further enhances the strength of the first electrode 20 and the second electrode 30.
[0079] As a specific embodiment, on the third-party direction c, the ratio between the sum of the widths of each first sub-part 211 and the width of the first connecting end 22 can be, but is not limited to, set to 1:1 or 1:2. On the third-party direction c, the ratio between the sum of the widths of each second sub-part 311 and the width of the second connecting end 32 can be, but is not limited to, set to 1:1 or 1:2.
[0080] In some embodiments, on the third direction c, the ratio of the sum of the widths D1 of each first sub-part 211 to the sum of the widths D5 of each first sub-channel 131 ranges from 1:1 to 1:1.8. And / or, on the third direction c, the ratio of the sum of the widths D3 of each second sub-part 311 to the sum of the widths D5 of each first sub-channel 131 ranges from 1:1 to 1:1.8.
[0081] Specifically, in the second horizontal direction, the widths of each first sub-channel 131 can be equal or unequal. As a specific embodiment, in the third horizontal direction c, the ratio of the sum of the widths D1 of each first sub-part 211 to the sum of the widths D5 of each first sub-channel 131 can be, but is not limited to, set to 1:1, 1:1.2, 1:1.4, 1:1.6, or 1:1.8. In the third horizontal direction c, the ratio of the sum of the widths D3 of each second sub-part 311 to the sum of the widths D5 of each first sub-channel 131 can be, but is not limited to, set to 1:1, 1:1.2, 1:1.4, 1:1.6, or 1:1.8. The different ratios of the sum of the widths D1 of each first sub-section 211 to the sum of the widths D5 of each first sub-channel 131, or the different ratios of the sum of the widths D3 of each second sub-section 311 to the sum of the widths D5 of each first sub-channel 131, will result in different material speeds through the feeding channel 13 and different current densities through the first electrode 20 and the second electrode 30.
[0082] In other words, the ratio of the sum of the widths of each first sub-section 211 to the sum of the widths of each first sub-channel 131, and the ratio of the sum of the widths of each second sub-section 311 to the sum of the widths of each first sub-channel 131, will affect the speed at which the material passes through the feeding channel 13, and will also affect the current density on the first electrode 20 and the second electrode 30, thereby affecting the uniformity of graphitization of the material in the feeding channel 13.
[0083] Based on this, by setting the ratio of the sum of the widths of each first sub-section 211 to the sum of the widths of each first sub-channel 131 to the above range, and by setting the ratio of the sum of the widths of each second sub-section 311 to the sum of the widths of each first sub-channel 131 to the above range, it is possible to better control the speed of the material passing through the feeding channel 13 and the current density on the first electrode 20 and the second electrode 30, so that the graphitization of the material in the feeding channel 13 is more uniform.
[0084] Furthermore, in the third direction c, the ratio of the sum of the widths of each first sub-section 211 to the sum of the widths of each first sub-channel 131 ranges from 1:1 to 1:1.4. And / or, in the third direction c, the ratio of the sum of the widths of each second sub-section 311 to the sum of the widths of each first sub-channel 131 ranges from 1:1 to 1:1.4. This further improves the uniformity of graphitization of the material during its passage through the feeding channel 13.
[0085] As a specific embodiment, on the third direction c, the ratio of the sum of the widths of each first sub-part 211 to the sum of the widths of each first sub-channel 131 can be, but is not limited to, set to 1:1, 1:1.1, 1:1.2, 1:1.3, or 1:1.4. On the third direction c, the ratio of the sum of the widths of each second sub-part 311 to the sum of the widths of each first sub-channel 131 can be, but is not limited to, set to 1:1, 1:1.1, 1:1.2, 1:1.3, or 1:1.4.
[0086] In some embodiments, on the third-party direction c, the widths of each first sub-part 211 and each second sub-part 311 are equal.
[0087] Specifically, in the second horizontal direction, the width of each first sub-section 211 and each second sub-section 311 is equal, so that the current and current density flowing through each first sub-section 211 and each second sub-section 311 are consistent, making the parallel electric field formed in the feeding channel 13 more uniform and improving the uniformity of material graphitization.
[0088] In some embodiments, in the first direction a, the ratio between the height H1 of the first electrode 20 and / or the second electrode 30 and the height H2 of the reaction chamber 11 ranges from 1:4 to 1:10.
[0089] Specifically, the heights of the first electrode 20 and the second electrode in the vertical direction can be set to be equal, and the height of the reaction chamber 11 in the vertical direction is the distance between the top wall and the bottom wall of the reaction chamber 11.
[0090] As a specific embodiment, in the first direction a, the ratio between the height H1 of the first electrode 20 and / or the second electrode 30 and the height H2 of the reaction chamber 11 can be, but is not limited to, set to 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, or 1:10. Wherein, different ratios between the height H1 of the first electrode 20 and / or the second electrode 30 and the height H2 of the reaction chamber 11 result in different residence times of the material in the feeding channel 13.
[0091] In other words, the ratio between the vertical height of the first electrode 20 and the second electrode and the height of the reaction chamber 11 will affect the residence time of the material in the feeding channel 13, thereby affecting the time for the material to be graphitized.
[0092] Therefore, by setting the ratio between the vertical height of the first electrode 20 and the second electrode and the height of the reaction chamber 11 to the range mentioned above, the residence time of the material in the feeding channel 13 can be better controlled, so that the material can be fully graphitized.
[0093] Furthermore, in the first direction a, the ratio between the height H1 of the first electrode 20 and / or the second electrode 30 and the height H2 of the reaction chamber 11 ranges from 1:6 to 1:9. This allows for better control of the material's residence time within the feeding channel 13, further improving the degree of graphitization of the material.
[0094] As a specific embodiment, in the first direction a, the ratio between the height H1 of the first electrode 20 and / or the second electrode 30 and the height H2 of the reaction chamber 11 can be, but is not limited to, set to 1:6, 1:7, 1:8, or 1:9.
[0095] In some embodiments, the ratio between the width of the first electrode 20 and / or the second electrode 30 along the third direction c and the height H1 of the first electrode 20 and / or the second electrode 30 along the first direction a ranges from 1:1.5 to 1:8.
[0096] Specifically, the width of the first electrode 20 and / or the second electrode 30 along the third direction c is the width of the first connection end 22 and / or the second connection end 32 along the third direction c.
[0097] As a specific embodiment, the ratio between the width of the first electrode 20 and / or the second electrode 30 along the third direction c and the height H1 of the first electrode 20 and / or the second electrode 30 along the first direction a can be, but is not limited to, set to 1:1.5, 1:2, 1:2.5, 1:3, 1:3.5, 1:4, 1:4.5, 1:5, 1:5.5, 1:6, 1:6.5, 1:7, 1:7.5, or 1:8. Wherein, if the ratio between the width of the first electrode 20 and / or the second electrode 30 along the second horizontal direction and the height of the first electrode 20 and / or the second electrode 30 along the first vertical direction is different, then the strengths of the first electrode 20 and the second electrode 30 will be different.
[0098] In other words, the ratio between the width of the first electrode 20 and / or the second electrode 30 along the second horizontal direction and the height of the first electrode 20 and / or the second electrode 30 along the vertical direction affects the strength of the first electrode 20 and the second electrode 30. Therefore, the above range enables the strength of the first electrode 20 and the second electrode 30 to meet production requirements and improves the service life of the graphitization furnace 100.
[0099] Furthermore, the ratio between the width of the first electrode 20 and / or the second electrode 30 along the third direction c and the height of the first electrode 20 and / or the second electrode 30 along the first direction a ranges from 1:2 to 1:4. This further improves the strength of the first electrode 20 and the second electrode 30, and extends the service life of the graphitization furnace 100.
[0100] As a specific embodiment, the ratio between the width of the first electrode 20 and / or the second electrode 30 along the third direction c and the height of the first electrode 20 and / or the second electrode 30 along the first direction a can be, but is not limited to, set to 1:2, 1:3, or 1:4.
[0101] In some embodiments, the furnace body 10 is further provided with a discharge port 14 communicating with the reaction chamber 11, and the discharge port 14 and the feed port 12 are respectively located on opposite sides of the reaction chamber 11 along the first direction a. The graphitization furnace 100 also includes a cooling assembly (not shown in the figure), which is in communication with the discharge port 14.
[0102] Specifically, the feed inlet 12 is located at the top of the furnace body 10, and the discharge outlet 14 is vertically opposite to the feed inlet 12 and located at the bottom of the furnace body 10. In this way, the material is put in through the feed inlet 12 and, under its own gravity, can slowly fall into the reaction chamber 11 and finally be discharged from the reaction chamber 11 through the discharge outlet 14.
[0103] Furthermore, after the material undergoes graphitization treatment in the reaction chamber 11, it has a high temperature. Therefore, the cooling component is connected to the discharge port 14 so that the material can smoothly enter the cooling component after being discharged from the discharge port 14, and the cooling component is used to cool the graphitized material.
[0104] Based on the same concept as the graphitization furnace 100 described above, this application also provides a heat treatment system including the graphitization furnace 100 as described above.
[0105] According to one or more embodiments, in specific use of this application, the material is put in through the feed inlet 12 and slowly falls into the feeding channel 13 between the first electrode 20 and the second electrode 30. In the feeding channel 13, the material is dispersed by the first sub-channels 131 and the second sub-channels 132. Each part of the material passes through the corresponding first sub-channels 131 and the second sub-channels 132 and is then uniformly heated in the parallel electric field of the corresponding first sub-channels 131 and the second sub-channels 132, so that the heating process of the material can be more uniform and thorough, improve the graphitization degree of the material, and improve the consistency of the product.
[0106] After the material passes through the feeding channel 13, it is discharged from the discharge port 14 to the cooling component, where it is cooled.
[0107] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0108] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A graphitization furnace characterized by, The application relates to a furnace body with a reaction cavity, a feeding port communicated with the reaction cavity being arranged on the furnace body along a first direction, and a first electrode and a second electrode with opposite polarities being arranged through the furnace body along a second direction intersecting the first direction and having one end in the reaction cavity. The first electrode has a first insertion end and a first connecting end connected with each other, the second electrode has a second insertion end and a second connecting end connected with each other, the first connecting end and the second connecting end are used for electrically connecting with external devices, the first insertion end and the second insertion end are located in the reaction cavity and are spaced apart from each other along the second direction and / or a third direction to form the discharging channel. The first direction, the second direction and the third direction are perpendicular to each other. The first insertion end comprises at least two first sub-parts, the second insertion end comprises at least two second sub-parts, each first sub-part and each second sub-part are alternately arranged along the third direction, and a first sub-channel is formed between each adjacent two first sub-parts and second sub-parts. In the second direction, a second sub-channel is formed between each first sub-part and the second connecting end and between each second sub-part and the first connecting end, and the first sub-channel and the second sub-channel jointly form the discharging channel.
2. The graphitization furnace of claim 1, wherein In the third direction, the ratio of the sum of the widths of each first sub-part to the width of the first connecting end ranges from 1:1 to 1:
5. In the third direction, the ratio of the sum of the widths of each second sub-part to the width of the second connecting end ranges from 1:1 to 1:
5.
3. The graphitization furnace of claim 2, wherein, In the third direction, the ratio of the sum of the widths of each first sub-part to the width of the first connecting end ranges from 1:1 to 1:
2. In the third direction, the ratio of the sum of the widths of each second sub-part to the width of the second connecting end ranges from 1:1 to 1:
2.
4. The graphitization furnace of claim 3, wherein In the third direction, the ratio of the sum of the widths of each first sub-part to the sum of the widths of each first sub-channel ranges from 1:1 to 1:1.
8. In the third direction, the ratio of the sum of the widths of each second sub-part to the sum of the widths of each first sub-channel ranges from 1:1 to 1:1.
8.
5. The graphitization furnace of claim 4, wherein, In the third direction, the ratio of the sum of the widths of each first sub-part to the sum of the widths of each first sub-channel ranges from 1:1 to 1:1.
4. In the third direction, the ratio of the sum of the widths of each second sub-part to the sum of the widths of each first sub-channel ranges from 1:1 to 1:1.
4.
6. The graphitization furnace of claim 3, wherein In the third direction, the widths of each first sub-part and each second sub-part are equal. 7. The graphitization furnace of claim 6, wherein 8. The graphitization furnace of claim 3, wherein, 9. The graphitization furnace of claim 1, wherein, In the first direction, the ratio between the height of the first electrode and / or the second electrode and the height of the reaction cavity ranges from 1:4 to 1:
10.
10. The graphitization furnace of claim 9, wherein, In the first direction, the ratio between the height of the first electrode and / or the second electrode and the height of the reaction cavity ranges from 1:6 to 1:
9.
11. The graphitization furnace of claim 2, wherein, The ratio between the width of the first electrode and / or the second electrode along the third direction and the height of the first electrode and / or the second electrode along the first direction ranges from 1:1.5 to 1:
8.
12. The graphitization furnace of claim 11, wherein, The ratio between the width of the first electrode and / or the second electrode along the third direction and the height of the first electrode and / or the second electrode along the first direction ranges from 1:2 to 1:
4.
13. The graphitization furnace of claim 1, wherein, The furnace body is further provided with a discharge port in communication with the reaction cavity, the discharge port and the feeding port being located on opposite sides of the reaction cavity along the first direction, respectively. The graphitization furnace further comprises a cooling assembly in communication with the discharge port.
14. A thermal processing system, comprising: A graphitization furnace comprising any one of claims 1-13.