Furnace end structure and graphitization furnace applying same

Abstract

The invention provides a furnace end structure and a graphitization furnace applying the same. The furnace end structure comprises a furnace end conductive electrode and a refractory masonry, wherein the refractory masonry is built around the furnace end conductive electrode in a surrounding manner; the refractory brickwork at least comprises furnace end side face brickwork bodies located on the two sides of the furnace end conductive electrode; the protection structural body is arranged on the outer side of the refractory masonry; and the expansion body is arranged between the furnace end side face brickwork and the protection structure body, and the expansion body is suitable for being compressed when the temperature of the furnace end conductive electrode rises and providing pressure for the furnace end side face brickwork when the temperature of the furnace end conductive electrode drops. According to the furnace end structure and the graphitization furnace applying the furnace end structure, the furnace end of the graphitization furnace can be effectively protected, and the production cost of the graphitization furnace is reduced.

Description

Technical Field

[0001] This application mainly relates to the field of graphitization, and particularly relates to a furnace head structure and a graphitization furnace to which the same is applied. Background Art

[0002] The graphitization furnace head is the core component of the graphitization furnace. The furnace head part accounts for about 65% of the total cost of the graphitization furnace, and the service life of the furnace head determines the service life of the graphitization furnace. For example, for about 10 graphitization furnaces supporting a medium-sized graphitization system, the overhaul cost of the graphitization furnace is 15 million yuan per year, which is expensive. Therefore, extending the service life of the graphitization furnace is one of the main ways to control the production cost of graphitization. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a furnace head structure and a graphitization furnace to which the same is applied, which can effectively protect the furnace head of the graphitization furnace and reduce the production cost of the graphitization furnace.

[0004] To solve the above technical problem, this application provides a furnace head structure of a graphitization furnace, including: a furnace head conductive electrode, a refractory masonry body, the refractory masonry body is built around the furnace head conductive electrode in a surrounding manner, and the refractory masonry body at least includes furnace head side masonry bodies located on both sides of the furnace head conductive electrode; a protection structure body, arranged on the outer side of the refractory masonry body; and an expansion body, arranged between the furnace head side masonry body and the protection structure body, wherein the expansion body is adapted to be compressed when the furnace head conductive electrode is heated and to provide pressure to the furnace head side masonry body when the furnace head conductive electrode is cooled.

[0005] Optionally, the furnace head structure further includes: a conductive wall surrounding the furnace head conductive electrode.

[0006] Optionally, the furnace head structure further includes: a buffer material located outside the conductive wall, wherein the buffer material includes a graphite material.

[0007] Optionally, both the furnace head conductive electrode and the conductive wall are made of a graphite material.

[0008] Optionally, the conductive wall further includes a non-graphitic carbon material, wherein a first part of the conductive wall including the graphite material surrounds the furnace head conductive electrode, and a second part of the conductive wall including the non-graphitic carbon material surrounds the first part.

[0009] Optionally, the refractory masonry body includes breathable voids, and the breathable voids are adapted to allow hot air flow generated during the operation of the graphitization furnace to pass through, wherein the breathable voids face the expansion body.

[0010] Optionally, when the graphitization furnace is a fixed graphitization furnace, the protective structure includes concrete; when the graphitization furnace is a mobile graphitization furnace, the protective structure includes a steel structure.

[0011] Optionally, the furnace head structure further includes: a support frame, connected to the protective structure from the outside, the support frame includes one or more cross beams and one or more columns, wherein the cross beam is located at the end face where the furnace head conductive electrode extends out of the refractory masonry and is above and / or below the furnace head conductive electrode, and the column is connected to the top and bottom of the graphitization furnace.

[0012] Optionally, the furnace head structure further includes: an insulating connector, connected between the cross beam and the column, wherein the insulating connector includes mica or phenolic resin material.

[0013] Optionally, the thickness of the expansion body is 20 mm to 200 mm.

[0014] Optionally, the furnace head structure further includes an expansion sealing ring, located between the furnace head conductive electrode and the refractory masonry, and the expansion sealing ring is adapted to deform to seal between the refractory masonry and the furnace head conductive electrode.

[0015] Optionally, the materials of the expansion body and the expansion sealing ring include zirconia, and / or the end face of the expansion sealing ring farther from the outer side of the refractory masonry is 30 mm to 50 mm away from the outer side.

[0016] Another aspect of the present application further provides a graphitization furnace, including: a furnace head area, including the furnace head structure proposed in any embodiment of the present application; a furnace body area, one end of the furnace head conductive electrode in the furnace head structure is connected to the furnace head area, and the other end passes through the refractory masonry and extends out of the refractory masonry to be connected to an external copper-aluminum row.

[0017] Optionally, the graphitization furnace further includes a base, located below the furnace body area.

[0018] Compared with the prior art, the present application has the following advantages: By arranging an expansion sealing ring between the furnace head conductive electrode and the refractory masonry, the present application plays a key role in preventing the graphitization furnace from deforming and leaking air. In addition, in some preferred embodiments, by arranging structures such as a protective structure and a support frame, the strength of the graphitization furnace can be improved while realizing the lightweight characteristic of the entire furnace body structure. In addition, by arranging components such as a conductive wall and combining the selection of graphite materials, the high temperature resistance characteristic of the entire graphitization furnace can be ensured. In the graphitization field, using the same materials and under the same production conditions, when producing the same product, the service life of the present invention is doubled. Description of the Drawings

[0019] The accompanying drawings are provided to further understand the present application. They are incorporated into and constitute a part of the present application. The drawings illustrate embodiments of the present application and, together with this specification, serve to explain the principles of the present application. In the drawings:

[0020] Figure 1 is a schematic top - view of the furnace head structure of a graphitization furnace according to an embodiment of the present application;

[0021] Figure 2 is a schematic cross - sectional view of the furnace head structure of a graphitization furnace according to an embodiment of the present application; and

[0022] Figure 3 is a schematic side - view of the furnace head structure of a graphitization furnace according to an embodiment of the present application. Detailed Embodiments

[0023] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the figures represent the same structure or operation.

[0024] As shown in the present application and the claims, unless the context clearly indicates an exception, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0025] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the sake of description, the dimensions of the various parts shown in the accompanying drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0026] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation terms 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. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0027] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "above-mentioned", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that spatial relative terms are intended to cover different orientations in use or operation other than the orientation described in the drawings for the device. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0028] In addition, it should be noted that the use of terms such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statement, the above terms have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present application. In addition, although the terms used in the present application are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the description herein. In addition, it is required to understand the present application not only through the actual terms used, but also through the meaning implied by each term.

[0029] It should be understood that when a component is referred to as "on another component", "connected to another component", "coupled to another component", or "in contact with another component", it can be directly on, connected to, or coupled to, or in contact with the other component, or there may be an intervening component. In contrast, when a component is referred to as "directly on another component", "directly connected to", "directly coupled to", or "directly in contact with" another component, there is no intervening component. Similarly, when a first component is referred to as "electrically in contact with" or "electrically coupled to" a second component, there is an electrical path that allows current to flow between the first component and the second component. The electrical path may include capacitors, coupled inductors, and / or other components that allow current to flow, even if there is no direct contact between the conductive components.

[0030] Embodiments of the present application are described with reference to Figures 1 to 3 a furnace head structure 10 of a graphitization furnace (hereinafter referred to as "furnace head structure 10") is proposed, wherein, Figure 1 FIG. shows a schematic top view of the furnace head structure 10, Figure 2 FIG. shows a schematic cross-sectional view of the furnace head structure 10, and Figure 3 FIG. shows the furnace head structure 10 as freely Figure 1 and Figure 2 a schematic side view observed from the A direction shown in FIG. Specifically, according to Figure 1 , the furnace head structure 10 includes a furnace head conductive electrode 101, a refractory masonry 102, a protective structure 106, and an expansion body 1032. Specifically, the refractory masonry 102 is built around the furnace head conductive electrode 101 in a surrounding manner, and the refractory masonry 102 at least includes furnace head side masonries 1023 located on both sides of the furnace head conductive electrode 101. The expansion body 1032 is disposed between the furnace head side masonry 1023 and the protective structure 106, wherein the expansion body 1032 is adapted to be compressed when the furnace head conductive electrode 101 is heated and to provide pressure to the furnace head side masonry 1023 when the furnace head conductive electrode 101 is cooled. Preferably, in the direction perpendicular to the Figure 1 A direction shown in FIG., the thickness of the expansion body 1032 is 20 mm to 200 mm, preferably 50 mm to 100 mm. Exemplarily, the protective structure 106 may be made of different materials depending on the type of graphitization furnace. Specifically, when the graphitization furnace is a stationary graphitization furnace, the protective structure includes concrete; when the graphitization furnace is a mobile graphitization furnace, the protective structure includes a steel structure,

[0031] Due to the high-temperature working scenario of the graphitization furnace (usually above 2000 degrees Celsius), during the heating process of the graphitization furnace, the temperatures of the component materials in the furnace body part increase accordingly, and the volume will expand. In the relevant prior art, usually, support columns or opposite-side steel bars are used to fix the outside of the graphitization furnace to prevent the furnace head from deforming. However, the effect of preventing the furnace head from deforming in this way is poor, and it often fails after several cycles of the graphitization furnace working, resulting in problems such as a low service life of the furnace head. After adopting the furnace head structure 10 as shown in Figure 1 , since an expansion body 1032 is provided between the furnace head side masonry 1023 and the outermost protection structure body 106 (preferably provided for the entire surface of the furnace head side masonry 1023), it can effectively protect the furnace head structure 10, especially the refractory masonry 102 therein, from being damaged such as deformation and cracking after being used for multiple cycles, and effectively improve the service life of the furnace head electrode.

[0032] On this basis, preferably, in the Figure 1 shown embodiment, the furnace head structure 10 further includes an expansion sealing ring 103. Further, the expansion sealing ring 103 is located between the furnace head conductive electrode 101 and the refractory masonry 102, and the expansion sealing ring 103 is adapted to deform to seal between the refractory masonry 102 and the furnace head conductive electrode 101. Preferably, the expansion sealing ring 103 is provided between all the furnace head conductive electrodes 101 and the refractory masonry 102. The materials preferably used for the expansion body 1032 and the expansion sealing ring 103 in this embodiment include zirconia. Specifically, the expansion coefficients of the furnace head conductive electrode 101 and the refractory masonry 102 are different. Therefore, during the heating and expansion process or the cooling and contraction process, cracks are likely to appear between the furnace head conductive electrode 101 and the refractory masonry 102. After adopting the design of the expansion sealing ring 103, it can make the furnace head conductive electrode 101 and the refractory masonry 102 always remain sealed during the temperature change process, effectively preventing the entry of external air during the working process of the graphitization furnace.

[0033] Further, referring to the Figure 1 , and the more clearly shown partial enlarged view in Figure 2 , the expansion sealing ring 103 has an end face 1030 that is farther from the outer side face 1020 of the refractory masonry 102. The distance D between the end face 1030 of the expansion sealing ring 103 and the outer side face 1020 is preferably 30 mm to 50 mm. In addition, from Figure 2As can be clearly seen, there is also a distance between the other side 1031 of the expansion sealing ring 103 opposite to the end face 1030 and the outer side face 1020. The range of this distance is preferably set to 1 mm to 10 mm, so that the expansion sealing ring 103 has sufficient deformation space to improve the reliability during long-term use. In this way, when the graphite furnace deforms due to temperature change and / or pressure change during operation, the expansion sealing ring 103 can be compressed to achieve the purpose of buffering, thereby reducing the risk of the refractory masonry 102 cracking due to thermal expansion and contraction. On the other hand, the expansion sealing ring 103 can also rebound after being compressed, so as to fill the gap between the furnace head conductive electrode 101 and the refractory masonry 102 caused by deformation and other factors, thereby improving the overall heat insulation effect of the graphite furnace and enhancing the stability and reliability of the operation of the graphite furnace.

[0034] Preferably in this embodiment, the furnace head structure 10 further includes a conductive wall 104, and the conductive wall 104 surrounds the furnace head conductive electrode 101. Preferably, both the furnace head conductive electrode 101 and the conductive wall 104 are made of graphite material. Further preferably, the furnace head structure 10 further includes a buffer material 105, which is located outside the conductive wall 104. Among them, the buffer material 105 includes graphite material. The buffer material 105 is preferably in a loose state as a whole, and in order to improve energy utilization efficiency, the buffer material 105 can be obtained from production waste of the graphite furnace, etc. The buffer material 105 is arranged between the refractory masonry 102 and the conductive wall 104.

[0035] In this embodiment, one end of the furnace head conductive electrode 101 of the furnace head structure 10 is connected to the furnace head area 100, and the other end passes through the refractory masonry 102 and extends outside the refractory masonry 102. The conductive wall 104 surrounds the furnace head conductive electrode 101 extending from the furnace body area 100 in a manner of closely adhering to one end face of the furnace body area 100. During the operation of the graphite furnace, the internal furnace body area 100 is relatively easy to deform due to high and low temperatures or pressure changes. At this time, due to the existence of the buffer material 105, the deformation of the furnace body area 100 can be effectively prevented from damaging the refractory masonry 102. After the stability of the refractory masonry 102 is improved, the reliability and stability of the overall furnace head structure 10 are significantly improved, thereby being able to solve the problem of increasing costs caused by the repair of the furnace head structure 10.

[0036] Further, in this embodiment, the furnace body area 100 may be filled with charging materials such as resistance materials, which generate heat after being energized to heat the billet in the graphitization furnace. Since the size of the furnace head conductive electrode 101 itself is relatively small compared to the furnace body area 100, after configuring the above-mentioned conductive wall 104, the contact area between the resistance materials and the conductive components in the furnace body area 100 can be increased. Since the buffer material 105 may also include graphite material and has conductivity, the contact area between the resistance materials and the conductive components in the furnace body area 100 is further increased, thereby more effectively improving the problem of uneven current. Moreover, since the graphite material has the characteristic of high temperature resistance, after the buffer material 105 adopts the graphite material, the heat resistance protection effect of the furnace body area 100 can be further improved.

[0037] More specifically, referring to Figure 1 and Figure 2 , the conductive wall 104 further includes non-graphitic carbon material. Among them, the first part 1041 of the graphite material described above in the conductive wall 104 surrounds the furnace head conductive electrode 101, and the second part 1042 of the non-graphitic carbon material in the conductive wall 104 surrounds the above-mentioned first part 1041.

[0038] Preferably, in this embodiment, the furnace head structure 10 further includes a protection structure body 106 (shown by a black solid line in Figure 1 and Figure 2 ), covering the outer side of the refractory masonry 102. More specifically, the refractory masonry 102 in the furnace head structure 10 includes air-permeable voids 1021, and the air-permeable voids 1021 are adapted to allow the hot air flow generated during the operation of the graphitization furnace to pass through. As can be seen from Figure 1 Figure 1 , the air-permeable voids 1021 face the expansion body 1032. Exemplarily, the refractory masonry 102 can be formed by stacking bricks. The above-mentioned air-permeable voids 1021 can be formed by increasing the spacing between bricks at some positions of the refractory masonry 102 to reach a non-contact state, etc. The present application does not limit the formation method of the air-permeable voids 1021.

[0039] On this basis, the furnace head structure 10 in this embodiment further includes a support frame 107, which is connected to the protection structure body 106 from the outside. Preferably, for better support effect, more clearly referring to Figure 2 and in combination with Figure 3, in this embodiment, the support frame 107 includes a plurality of cross beams 1071 and a plurality of columns 1072. Among them, the cross beams 1071 are located on the end face where the furnace head conductive electrode 101 extends out of the refractory masonry 102, and are located above and below the furnace head conductive electrode 101. The columns 1072 are connected to the top 1001 and the bottom 1002 of the graphitization furnace. It should be noted that although the number of cross beams 1071 and columns 1072 shown in this embodiment is plural, the present application is not limited to such an implementation manner. In different embodiments of the present application, the number of cross beams 1071 and columns 1072 can be freely selected according to actual situations. For example, in some cases, it can be reduced to one or shown with more on the basis of Figures 1 to 3 the example shown.

[0040] Further preferably, the furnace body structure 10 further includes an insulating connector 108, which is connected between the cross beam 1071 and the column 1072. Among them, the insulating connector 108 includes mica or phenolic resin material. In some embodiments, the insulating connector 108 can be understood as a ceramic spacer. By providing the insulating connector 108, there is no complete closed-loop metal ring around the furnace head conductive electrode 101, avoiding the generation of eddy currents when the graphitization furnace is working, thereby reducing energy loss.

[0041] On the other hand, the present application also proposes a graphitization furnace, which includes a furnace head area, and the furnace head area includes the furnace head structure proposed in any embodiment of the present application, for example, the furnace head structure 10 as shown in Figures 1 to 3 . In the graphitization furnace, one end of the furnace head conductive electrode in the furnace head structure is connected to the furnace head area, and the other end passes through the refractory masonry and extends out of the refractory masonry and is connected to the external copper-aluminum row. Taking Figures 1 to 3 as an example, when the furnace head structure 10 is adopted, the graphitization furnace further includes a base 109, which is located below the furnace body area 100. The base 109 is preferably made of concrete material, which can provide a good supporting effect for the furnace body area 100.

[0042] Since the graphitization furnace can adopt the furnace head structure 10 and its preferred variant embodiments shown in the present application, for example, Figures 1 to 3 , the details about the furnace head structure 10 will not be elaborated again. On the other hand, the furnace body structure and other features of the graphitization furnace can be designed with reference to the structure settings of the graphitization furnace in the prior art to achieve the purpose of sintering (for example, above 2500 degrees Celsius) the product blank. By providing the improved furnace head structure 10 of the present application, the furnace head can be effectively protected and the production cost of the graphitization furnace can be reduced.

[0043] The basic concepts have been described above. Obviously, for those skilled in the art, the above application disclosure is only for illustration and does not constitute a limitation to this application. Although not explicitly stated here, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are proposed in this application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

[0044] Meanwhile, this application uses specific terms to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0045] Similarly, it should be noted that, in order to simplify the description of this application disclosure and thus help the understanding of one or more application embodiments, in the previous description of the embodiments of this application, sometimes multiple features are grouped into one embodiment, drawing, or the description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than those mentioned in the claims. In fact, the features of the embodiments are fewer than all the features of the individual embodiments disclosed above.

[0046] In some embodiments, numbers are used to describe components and the quantity of attributes. It should be understood that such numbers used for the description of embodiments are, in some examples, modified by the modifiers "about", "approximate", or "substantially". Unless otherwise stated, "about", "approximate", or "substantially" indicate that the said numbers allow a ±20% variation. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, and such approximate values may change according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should consider the specified significant digits and adopt the method of retaining general digits. Although the numerical ranges and parameters used in some embodiments of this application to confirm the breadth of their scope are approximate values, in specific embodiments, the setting of such numerical values is as precise as possible within the feasible range.

[0047] Although this application has been described with reference to the current specific embodiments, those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, as long as the changes and variations of the above embodiments are within the scope of the spirit of this application, they will fall within the scope of the claims of this application.

Claims

1. The furnace head structure of a graphitization furnace is characterized in that Comprising: The furnace head conductive electrode, The refractory masonry, which is built around the furnace head conductive electrode in a surrounding manner, and the refractory masonry at least includes the furnace head side masonry located on both sides of the furnace head conductive electrode; The protection structure, which is arranged outside the refractory masonry; and The expansion body, which is arranged between the furnace head side masonry and the protection structure, wherein the expansion body is adapted to be compressed when the furnace head conductive electrode is heated up and to provide pressure to the furnace head side masonry when the furnace head conductive electrode is cooled down.

2. The furnace head structure of the graphitization furnace according to claim 1, characterized in that, Further comprising: The conductive wall, which surrounds the furnace head conductive electrode.

3. The furnace head structure of the graphitization furnace according to claim 2, characterized in that, Further comprising: The buffer material, which is located outside the conductive wall, wherein the buffer material includes graphite material.

4. The furnace head structure of the graphitization furnace according to claim 2, characterized in that, Both the furnace head conductive electrode and the conductive wall are made of graphite material.

5. The furnace head structure of the graphitization furnace according to claim 4, wherein the conductive wall further comprises a non-graphitic carbon material, where The first part including the graphite material in the conductive wall surrounds the furnace head conductive electrode, and the second part including the non-graphitic carbon material in the conductive wall surrounds the first part.

6. The furnace head structure of the graphitization furnace according to claim 1, characterized in that, The refractory masonry includes breathable voids, which are adapted to allow the hot air flow generated during the operation of the graphitization furnace to pass through, wherein the breathable voids face the expansion body.

7. The furnace head structure of the graphitization furnace according to claim 1, characterized in that, When the graphitization furnace is a stationary graphitization furnace, the protection structure includes concrete; when the graphitization furnace is a mobile graphitization furnace, the protection structure includes a steel structure.

8. The furnace head structure of the graphitization furnace according to claim 7, characterized in that, Further comprising: The support frame, which is connected to the protection structure from the outside, and the support frame includes one or more cross beams and one or more columns, wherein the cross beam is located at the end face where the furnace head conductive electrode extends out of the refractory masonry and above and / or below the furnace head conductive electrode, and the column is connected to the top and bottom of the graphitization furnace.

9. The furnace head structure of the graphitization furnace according to claim 8, characterized in that, Further comprising: The insulating connector, which is connected between the cross beam and the column, wherein the insulating connector includes mica or phenolic resin material.

10. The furnace head structure of the graphitization furnace according to claim 1, characterized in that, The thickness of the expansion body is 20 mm to 200 mm.

11. The furnace head structure of the graphitization furnace according to any one of claims 1 to 9, characterized in that, Further comprising an expansion sealing ring, which is located between the furnace head conductive electrode and the refractory masonry, and the expansion sealing ring is adapted to deform to seal between the refractory masonry and the furnace head conductive electrode.

12. The furnace head structure of the graphitization furnace according to claim 11, characterized in that, The materials of the expansion body and the expansion sealing ring include zirconia, and / or the end face of the expansion sealing ring farther from the outer side of the refractory masonry is 30 mm to 50 mm away from the outer side.

13. A graphitization furnace, characterized in that, Comprising: The furnace head area, including the furnace head structure according to any one of claims 1 to 12; The furnace body area, one end of the furnace head conductive electrode in the furnace head structure is connected to the furnace head area, and the other end passes through the refractory masonry and extends out of the refractory masonry to be connected to the external copper-aluminum busbar.

14. The furnace head structure of the graphitization furnace according to claim 13, characterized in that, Further comprising a base, which is located below the furnace body area.

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