Leak-proof treatment method and applicable cooling device, furnace electrode, graphitization furnace

Abstract

The application provides a leakage-proof treatment method and a cooling device, a furnace end electrode and a graphitization furnace suitable therefor. The leakage-proof treatment method comprises the following steps: step S1: vertically arranging the furnace end electrode and keeping the opening of the cooling cavity upward, wherein the cooling cavity is arranged on the outer end surface of the furnace end electrode; step S2: injecting a leakage-proof agent into the cooling cavity and sealing the cooling cavity; step S3: injecting compressed air into the cooling cavity through a compressed air nozzle communicated with the cooling cavity; and step S4: keeping the cooling cavity in a pressurized state until the leakage-proof agent completes the penetration into the pores of the furnace end electrode. The leakage-proof treatment method and the cooling device, the furnace end electrode and the graphitization furnace suitable therefor can improve the cooling effect of the furnace end electrode under the premise of effectively preventing the occurrence of the water oxidation reaction of the electrode.

Description

Technical Field

[0001] This application mainly relates to the field of graphitization, and in particular to a leak-proof treatment method and a suitable cooling device, furnace head electrode, and graphitization furnace. Background Technology

[0002] Graphitization furnaces supply electricity to the furnace through graphite furnace head electrodes. During this process, the furnace head electrodes themselves heat up under the influence of the current, and the high-temperature heat inside the furnace is also continuously dissipated through the electrode body. This results in a relatively high temperature for the furnace head electrodes during operation, requiring cooling. Due to the inherent characteristics of the furnace head electrodes, they have approximately 30% porosity, half of which are through-holes. If cooling liquid (such as cooling water) comes into direct contact with the furnace head electrodes, the cooling liquid will seep into the electrode body. When the electrode temperature reaches a certain point, the carbon in the graphite reacts with the water in an oxidation reaction: C + H₂O = CO + H₂, leading to rapid electrode damage. Therefore, existing technologies use water jackets for cooling. While this method physically isolates the cooling liquid from the furnace head electrodes, the cooling effect is unsatisfactory, especially for the high current conditions exceeding 200,000 amperes for existing furnace head electrodes. Therefore, there is an urgent need in the field for an effective, safe, and reliable cooling solution for graphitization furnace head electrodes. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a leakage prevention treatment method and a suitable cooling device, furnace head electrode, and graphitization furnace, which can improve the cooling effect of the furnace head electrode while effectively preventing the oxidation reaction of electrode water.

[0004] To solve the above-mentioned technical problems, this application provides a method for preventing leakage, applicable to the furnace head electrode of a graphitization furnace. The method includes the following steps: Step S1: Erect the furnace head electrode and keep the opening of the cooling chamber facing upwards, wherein the cooling chamber is located on the outer end face of the furnace head electrode; Step S2: Inject an anti-leakage agent into the cooling chamber and then seal the cooling chamber; Step S3: Inject compressed air into the cooling chamber through a compressed air nozzle connected to the cooling chamber; Step S4: Keep the cooling chamber pressurized until the anti-leakage agent has completely penetrated into the pores of the furnace head electrode.

[0005] Optionally, the anti-seepage agent comprises a mixture of a coagulable liquid and graphite powder, wherein the graphite powder comprises graphite particles with a particle size of less than or equal to 10 micrometers, and the coagulable liquid comprises anti-rust paint, asphalt paint, and / or resin-based coagulants.

[0006] Optionally, the compressed air pressure is greater than or equal to 0.6 MPa.

[0007] Optionally, step S4 further includes: maintaining the cooling chamber under pressure until a preset time, then opening the cooling chamber and draining the remaining anti-seepage agent, wherein the preset time condition includes more than 1 hour.

[0008] Optionally, step S4 further includes maintaining the pressurized state of the cooling chamber until a preset time, measuring the liquid level drop distance of the anti-seepage agent in the cooling chamber, and repeating steps S2 to S4 again if the liquid level drop distance exceeds a liquid level drop threshold, wherein the liquid level drop threshold includes 10mm to 20mm.

[0009] Another aspect of this application proposes a cooling device for a graphitized furnace head electrode, comprising: a cooling chamber located in the furnace head electrode, wherein the outer end face of the furnace head electrode has an electrode opening, and the cooling chamber extends from the electrode opening into the interior of the furnace head electrode; an outlet pipe communicating with the cooling chamber; and an inlet pipe communicating with the cooling chamber, wherein the furnace head electrode is treated with the anti-leakage treatment method proposed in any embodiment of this application before use.

[0010] Optionally, the cooling chamber has a cooling chamber depth along the extension direction of the burner electrode, and the ratio of the cooling chamber depth to the electrode length of the burner electrode along the extension direction is 1 / 3 to 3 / 4.

[0011] Optionally, the graphitization furnace includes a furnace wall surrounding the furnace head electrode, the furnace head electrode extending out of the furnace wall along the extending direction, wherein the cooling chamber in the furnace head electrode has its end located at the part where the outer end face of the furnace head electrode connects with the copper busbar.

[0012] Optionally, the liquid inlet pipe has a liquid inlet pipe end in the cooling chamber, and the liquid inlet pipe end is located near the bottom of the cooling chamber.

[0013] Optionally, the outlet pipe has an outlet pipe end in the cooling chamber, the outlet pipe end being located near the electrode opening, wherein the outlet pipe is configured to allow the coolant to flow naturally out of the cooling chamber.

[0014] Optionally, the cooling device further includes a fastening fixture, which includes a cover located at the electrode opening, an internal fastener located in the cooling chamber, and a connecting portion, wherein the cover is adapted to be connected to the internal fastener via the connecting portion.

[0015] Optionally, the internal fastener has a slot, and the connecting portion is adapted to be fixedly connected to the slot; and the inner wall of the cooling cavity has a locking portion, which is adapted to engage with the end of the internal fastener.

[0016] Optionally, the burner electrode also has a blocking portion near the electrode opening, the blocking portion forming a receiving space with the outer end face of the burner electrode, the receiving space being used to receive the cover.

[0017] Another aspect of this application proposes a furnace head electrode for a graphitization furnace, comprising: a cooling device for the graphitization furnace head electrode as described in any embodiment of this application.

[0018] Another aspect of this application proposes a graphitization furnace, comprising: a furnace head electrode as described in any embodiment of this application.

[0019] Compared with existing technologies, this application has the following advantages: By taking anti-leakage treatment before the furnace head electrode is used to form a sealed area surrounding the cooling chamber, the cooling liquid can directly contact the furnace head electrode for effective cooling without further penetrating into the deeper parts of the furnace head electrode, thereby effectively preventing electrode oxidation and protecting the electrode. The furnace head electrode and graphitization furnace using the above-mentioned cooling device can have a service life more than twice that of furnaces built using conventional methods, extending the service life of the electrode and thus the graphitization furnace, significantly reducing production costs. Attached Figure Description

[0020] The accompanying drawings are included to provide a further understanding of this application; they are incorporated into and constitute a part of this application. The drawings illustrate embodiments of this application and, together with this specification, serve to explain the principles of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of a cooling device for a graphitized furnace head electrode according to an embodiment of this application;

[0022] Figure 2 This is a schematic flowchart of a leak-proof treatment method according to an embodiment of this application;

[0023] Figure 3 This application is as follows Figure 2 The diagram shows a schematic representation of a leak-proof treatment method according to one embodiment. Detailed Implementation

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0025] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional 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, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0028] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. In addition, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application's specification may have been chosen by the applicant according to his or her judgment, and their detailed meanings are explained in the relevant sections of this description. Moreover, this application should be understood not only through the actual terms used, but also through the meaning implied by each term.

[0030] 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, coupled to, or in contact with that 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 contacting" or "electrically coupled to" a second component, there is an electrical path between the first and second components that allows current to flow. This 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.

[0031] This application refers to Figure 1 A cooling device 10 for a graphitized furnace head electrode is proposed, which can improve the cooling effect of the furnace head electrode while effectively preventing the oxidation reaction of electrode water. The cooling device 10 includes a cooling chamber 11, a liquid outlet pipe 12, and a liquid inlet pipe 13. The cooling chamber 11 is located within the furnace head electrode 100. See details below. Figure 1The burner electrode 100 has an electrode opening 102 at its outer end face 101, and a cooling chamber 11 extends from the electrode opening 102 into the interior of the burner electrode 100. Furthermore, both the liquid outlet pipe 12 and the liquid inlet pipe 13 are connected to the cooling chamber 11. In this embodiment, the burner electrode 100 includes a sealing region 103, which includes an anti-seepage agent and the electrode material used in the burner electrode 100. The anti-seepage agent is used to fill the pores of the electrode material in the sealing region 103, and the sealing region 103 is located at the edge region of the burner electrode 100 near the cooling chamber 11. Preferably, in this embodiment, the anti-seepage agent includes a mixture of a solidifiable liquid and graphite powder, wherein the graphite powder contains graphite particles with a particle size of less than or equal to 10 micrometers, and the solidifiable liquid includes anti-rust paint, asphalt paint, and / or resin-based solidifying agents.

[0032] Specifically, the sealing area 103 is obtained after the burner electrode 100 has been treated with the anti-leakage treatment method proposed in this application. It can be considered that the sealing area 103 is composed of the electrode material used in the burner electrode 100 and the anti-leakage agent. (Refer to...) Figure 2 This is an embodiment of a leak-proof treatment method proposed in this application. Figure 2 The anti-leakage treatment method 20 includes the following steps: Step S1: Erect the burner electrode and keep the opening of the cooling chamber facing upwards, wherein the cooling chamber is located on the outer end face of the burner electrode; Step S2: Inject an anti-leakage agent into the cooling chamber and then seal the cooling chamber; Step S3: Inject compressed air into the cooling chamber through a compressed air nozzle connected to the cooling chamber; Step S4: Keep the cooling chamber pressurized until the anti-leakage agent has completely penetrated into the pores of the burner electrode.

[0033] Preferably, the compressed air pressure in step S3 is greater than or equal to 0.6 MPa. Further, step S4 preferably includes: maintaining the cooling chamber under pressure for a preset time, then opening the cooling chamber and draining the remaining anti-seepage agent, wherein the preset time condition includes more than 1 hour. Based on step S4, after maintaining the cooling chamber under pressure for the preset time, the liquid level drop distance of the anti-seepage agent in the cooling chamber can be measured. If the liquid level drop distance exceeds the liquid level drop threshold, steps S2 to S4 are repeated, wherein the liquid level drop threshold includes 10 mm to 20 mm. In this way, for some furnace head electrodes with larger pores, the anti-seepage treatment process can be better improved by injecting anti-seepage agent and pressurizing it multiple times. Electrodes treated with the above anti-seepage treatment can continue to wait for 48 hours before use to ensure the anti-seepage effect.

[0034] For example, the above reference Figure 2 The proposed anti-leakage treatment method 20 can be applied to, for example... Figure 1 The cooling device 10 for the graphitization furnace head electrode shown below is described in detail below. Figure 1 Taking the cooling device 10 shown as an example, according to Figure 3 The schematic diagram illustrates the steps of the above-mentioned leak-proof treatment method 20. Specifically, Figure 3 For example Figure 1 The diagram shows the cooling device 10 erected in the vertical y-direction, which is perpendicular to the extension direction x of the burner electrode 100. Specifically, the burner electrode 100 is first erected. Further, an anti-seepage agent 1030 can be injected through one of the external ports 131 of the inlet pipe 13 and 121 of the outlet pipe 12, and compressed air can be injected through the other. More preferably, the compressed air pressure is greater than or equal to 0.6 MPa, more preferably greater than or equal to 0.8 MPa. For example, Figure 3 One injection scenario is illustrated. For example, the cap 141 can be securely fastened to the burner electrode 100 using the fastening fixture 14; this structural detail will be provided later. The sealed state is maintained until the anti-leakage agent has completely penetrated into the pores of the burner electrode 100, thus completing the anti-leakage treatment.

[0035] Combination Figure 1 and Figure 2 Based on the quality characteristics of the electrode material used in the burner electrode 100, the particles are relatively far apart and porous. The anti-seepage agent is used to fill the pores of the electrode material used in the burner electrode 100, thereby preventing the cooling liquid from leaking from the sealing area 103 into the deeper part of the burner electrode 100 during use. For example, a pre-sealing method can be used to ensure sufficient contact between the anti-seepage agent and the edge area of ​​the burner electrode 100 near the cooling chamber 11, forming a protective layer (i.e., the sealing area 103) in this edge area. This ensures that during long-term use of the cooling device 10, the cooling liquid can directly contact the burner electrode 100 without causing the negative impact of the cooling liquid leaking into the deeper part of the burner electrode 100. It should be noted that the sealing area 103 within the dashed box in the accompanying drawings of different embodiments of this application is only schematic. Such illustrations are only used to show the approximate area traveled after the anti-seepage agent fills the pores in the burner electrode 100, and do not limit the shape or depth of the sealing area in actual applications.

[0036] The structure of the cooling device 10 will be described below. According to... Figure 1 The cooling chamber 11 has a depth L along the x-direction of the burner electrode 100. The ratio of the cooling chamber depth L to the electrode length of the burner electrode 100 along the x-direction is 1 / 3 to 3 / 4. By setting this ratio range, both a good cooling effect and the basic integrity and reliability of the burner electrode 100 can be achieved. Figure 1 As shown, in this embodiment, the graphitization furnace further includes a furnace wall 104 surrounding the furnace head electrode 100. The furnace head electrode 100 extends beyond the furnace wall 104 along the x-direction. Preferably, the length of the furnace head electrode 100 extending beyond the furnace wall 104 is 450mm to 700mm, and more preferably 550mm to 600mm. The cooling chamber 11 has its bottom 110 within the furnace head electrode 100, located within the outer edge 1040 of the furnace wall 104. The cooling chamber 11 also has its end opposite the bottom 110, located on the outer end face 101 of the furnace head electrode 100 where it connects to the copper busbar. However, this application is not limited to this; the cooling chamber depth L of the cooling chamber 11 can be further adjusted according to actual production disclosures. Preferably, the cooling chamber depth L is set to the area outside the furnace wall 104 where the furnace head electrode 100 is located. Depending on the quality of the furnace head electrode 100, the cooling chamber 11 can be extended approximately 50mm into the outer edge 1040 of the furnace wall, for example, extending inward by 45mm to 55mm. In practical applications of the furnace head electrode 100, its inner side has a high-temperature zone of the furnace core, and its outer side needs to be connected to a copper busbar for power supply. Therefore, the portion where the outer end face 101 connects to the copper busbar can be better cooled by using the cooling device 10. For example, Figure 1 In the embodiment shown, the bottom 110 of the cooling chamber is in Figure 1 The cross-section shown preferably includes a conical shape, which can match the shape of the drill bit and facilitate its fabrication. However, this application is not limited to this, and in other embodiments, the bottom 110 of the cooling chamber may also have other shapes.

[0037] Reference Figure 1The inlet pipe 13 has an inlet pipe end 130 in the cooling chamber 11, located near the bottom 110 of the cooling chamber. Conversely, the outlet pipe 12 has an outlet pipe end 120 in the cooling chamber 11, located near the electrode opening 102 on the outer end face 101 of the burner electrode 100. In actual operation, the cooling liquid flows from the inlet pipe 13 into the cooling chamber 11 near the bottom 110, and finally flows out of the cooling chamber 11 naturally through the outlet pipe 12 near the electrode opening 102. During this process, the high-temperature heat generated by the burner electrode 100 during operation is carried away, thus cooling the burner electrode 100. More preferably, the cooling device 10 can further provide a collection tank at the outlet pipe 12 to collect the cooling liquid flowing naturally out of the cooling chamber 11 and recycle it. In this embodiment, a preferred method is to allow the cooling liquid to flow naturally out of the cooling chamber 11, unaffected by the liquid pressure of valves or pipelines during the outflow process. For example, a water pump can be used to inject cooling liquid through the inlet pipe 13. The cooling liquid is preferably ambient temperature circulating water from the graphitization furnace under normal operating conditions, thereby improving efficiency and reducing costs. Since the inlet pipe 13 uses a water pump to inject the cooling liquid, the outlet pipe 12 allows the cooling liquid to flow out naturally. This method avoids excessive pressure in the area where the cooling chamber 11 is located in the furnace head electrode 100, thus reducing the risk of water seepage from the cooling chamber 11 into deeper areas beyond the sealed area 103 in the furnace head electrode 100, and improving the safety and reliability of the cooling chamber 11.

[0038] Further preferably, the cooling device 10 in this embodiment also includes a fastening fixture 14. First, the fastening fixture 14 includes a cover 141 located at the electrode opening 102, an internal fixing member 142 located in the cooling chamber, and a connecting portion 143. The cover 141 is adapted to be connected to the internal fixing member 142 via the connecting portion 143. Preferably, the connecting portion 143 can be implemented as a screw structure, with a length of 220mm to 270mm, preferably 250mm or 240mm to 260mm. Further preferably, the internal fixing member 142 in this embodiment has a slot 1420, and the connecting portion 143 is adapted to be fixedly connected to the slot 1420. Based on this, a locking portion 111 is provided on the inner wall of the cooling chamber 11, which is adapted to engage with the fixing end 1421 of the internal fixing member 142. More preferably, the burner electrode 100 also has a blocking portion 105 near the electrode opening 102. The blocking portion 105 is adapted to form a receiving space between itself and the outer end face 101 of the burner electrode 100. This receiving space is used to receive the cover 141 and further improve the stability and sealing effect of the cover 141.

[0039] Specifically Figure 1The internal fastener 142 and the connecting part 143 can be T-shaped as a whole. To achieve the above structure, after forming the cooling cavity 11, a locking part 111 is formed at an appropriate position on the inner wall of the cooling cavity 11. The internal fastener 142 is placed in the cooling cavity 11 and moved to the position of the locking part 111 to fix the internal fastener 142 in the locking part 111. On this basis, the connecting part 143 is placed in the cooling cavity and fixed in the slot 1420 of the internal fastener 142 to complete the assembly of the connecting part 143 and the internal fastener 142. Furthermore, in this embodiment, the fastening fixture 14 may also include a fastener 144. After the cover 141 is placed in the above-mentioned receiving space, the cover 141 and the connecting part 143 are fixedly connected by the fastener 144 to complete the assembly of the fastening fixture 14. After assembly, the cover 141 is used to seal the electrode opening 102.

[0040] In existing technologies, to secure the cover 141 to the burner electrode 100, it is often necessary to insert a fixing connection structure into the burner electrode 100 using methods that involve significant damage to the surface area. For example, a fixing connection structure can be inserted into the burner electrode 100 through the upper surface 100a to secure the cover 141; or more fasteners 144 can be used at the electrode opening 102 to secure the cover 141 to the outer end face 101 of the burner electrode 100. Regardless of the fixing method used, significant damage to the burner electrode 100 is required. In contrast, this application only requires reserving a small-area locking portion 111 at an appropriate location in the cooling chamber 11 and connecting it with internal fasteners 142 and connecting portions 143 to secure the cover 141. This results in less impact on the burner electrode 100 and higher stability and reliability of the burner electrode 100 during long-term use.

[0041] Another aspect of this application discloses a furnace head electrode for a graphitization furnace, which includes a cooling device for the graphitization furnace head electrode in any embodiment of this application. For example, the furnace head electrode may be as follows: Figure 1 The furnace head electrode 100 shown is compatible with the cooling device 10. Based on this, this application also proposes a graphitization furnace, which includes the furnace head electrode proposed in any embodiment of this application. In addition, the graphitization furnace should also have other working areas to achieve the purpose of heating the product blank at high temperatures (e.g., above 2500 degrees Celsius). Specific implementations can be found in the prior art, but since this is not the focus of this application, they will not be elaborated upon here.

[0042] To facilitate understanding of the beneficial technical effects of the cooling method in this application, the technical background and overall concept of the improved technical solution are explained below. The furnace head electrode connects the high-temperature graphitization furnace to the external power supply copper wire, serving a conductive function. One end of the electrode is connected to the high-temperature zone, and the other end is connected to the copper busbar. The connection end of the furnace head electrode is generally exposed. The temperature inside the high-temperature graphitization furnace exceeds 2000℃, and the high-temperature heat is conducted along the electrode to the outer end, causing the temperature of the exposed electrode tip to exceed 500℃. On the one hand, the high temperature will damage the copper busbar connected to it; on the other hand, the high-temperature conditions accelerate the reaction between graphite and air, until the electrode is damaged. Therefore, the exposed part of the furnace head electrode (e.g., refer to this application) Figure 1 The area of ​​the furnace head electrode 100 extending beyond the furnace wall 104 (as shown) requires strict cooling measures to ensure the smooth progress of graphitization production.

[0043] Regarding early cooling methods: Early electrodes were of poor quality, with a porosity exceeding 40% in the furnace head electrodes. Initially, external water cooling was used, which resulted in a poor environment and ineffective cooling. Later, perforations were drilled in the electrode ends to embed cooling water jackets for indirect cooling, but this was also ineffective. With the increasing scale and size of graphitization processes, the graphitization current, which was originally below 100,000 amperes, has now generally exceeded 200,000 amperes, with some reaching 400,000 amperes. Embedded water jacket cooling is now insufficient to meet these requirements, often necessitating external water cooling. Therefore, all early cooling methods were ineffective.

[0044] Regarding the cooling method of this application: Based on the shortcomings of the aforementioned early cooling methods, and considering the significant improvement in the quality of graphitized furnace head electrodes (with a porosity of approximately 30%, half being closed pores and half open pores), the applicant conceived an improved approach distinct from the early cooling methods: an anti-seepage agent is forced into the pores of the furnace head electrode body through pressurization. During the use of the treated furnace head electrode, even if cooling water is directly introduced into the cooling chamber, it cannot enter the electrode body. Simultaneously, cooling can be achieved without the need for a water jacket for isolation. While existing technologies also employ direct curing with resin coating at the water jacket, the inventors of this application observed that with such a simple curing method, after a period of use, significant structural loosening and even fracture occur in the deep layers of the electrode body at the bottom of the furnace head electrode holes. The fractured graphite body is soft, exhibiting clear water oxidation characteristics, a consequence of water seeping into the electrode body through the open pores. Based on this, the cooling method of this application, especially for example... Figure 2After steps S3-S4, most furnace head electrodes achieve a relatively dense protective filling effect of the anti-seepage agent inside. In actual operation, some furnace head electrodes experience anti-seepage agent leakage from the outer surface of the electrode during pressurization. This is due to problems with the electrode structure itself and poor quality. These electrodes can be further treated by repeatedly pressurizing and observing the decrease in pressure, as described in the preferred embodiment. After repeated pressurization, these lower-quality graphitized furnace head electrodes, when applied to graphitization furnaces, generally have the same service life as normal electrodes.

[0045] The basic concepts have been described above. Obviously, for those skilled in the art, the above disclosure is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0046] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0047] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0048] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0049] Although this application has been described with reference to specific embodiments, those skilled 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, any changes or modifications to the above embodiments within the essential spirit of this application will fall within the scope of the claims of this application.

Claims

1. A cooling device for a graphitization furnace head electrode, characterized in that, The cooling device comprises: a cooling cavity in the electrode, wherein an outer end surface of the electrode has an electrode opening, and the cooling cavity extends from the electrode opening to an inside of the electrode; a liquid outlet pipe in communication with the cooling cavity; a liquid inlet pipe in communication with the cooling cavity, a fastening tool comprising a cover located at the electrode opening, an inner fixing member located in the cooling cavity, and a connecting part, wherein the cover is adapted to be connected to the inner fixing member through the connecting part, the inner fixing member has a clamping groove, and the connecting part is adapted to be fixedly connected to the clamping groove; and an inner wall of the cooling cavity is provided with a clamping part adapted to be clamped with an end part of the inner fixing member; wherein the electrode is treated by a leakage prevention treatment method before use, and the leakage prevention treatment method comprises the following steps: Step S1: vertically standing the electrode, and keeping the opening of the cooling cavity upward, wherein the cooling cavity is provided in an outer end surface of the electrode; Step S2: injecting a leakage prevention agent into the cooling cavity, and then sealing the cooling cavity; Step S3: injecting compressed air into the cooling cavity through a compressed air nozzle in communication with the cooling cavity; Step S4: keeping the cooling cavity in a pressurized state until the leakage prevention agent completes penetration into pores of the electrode, wherein the step S4 further comprises keeping the cooling cavity in the pressurized state until a preset time, measuring a liquid level drop distance of the leakage prevention agent in the cooling cavity, if the liquid level drop distance exceeds a liquid level drop threshold, then repeatedly executing the steps S2-S4, otherwise, opening the cooling cavity and emptying the remaining leakage prevention agent.

2. Cooling device according to claim 1, characterized in that The cooling cavity has a cooling cavity depth along an extension direction of the electrode, and a ratio of the cooling cavity depth to an electrode length of the electrode along the extension direction is 1 / 3-3 / 4.

3. The cooling device of claim 1, wherein The graphitization furnace comprises a furnace wall surrounding the electrode, and the electrode extends out of the furnace wall along an extension direction, wherein a cooling cavity end part of the cooling cavity in the electrode is located at a position where the outer end surface of the electrode is connected with a copper bar.

4. The cooling device of claim 1, wherein The liquid inlet pipe has a liquid inlet pipe end part in the cooling cavity, and the liquid inlet pipe end part is close to a position where a cooling cavity bottom of the cooling cavity is located.

5. Cooling device according to claim 4, characterized in that The liquid outlet pipe has a liquid outlet pipe end part in the cooling cavity, and the liquid outlet pipe end part is close to a position where the electrode opening is located, wherein the liquid outlet pipe is configured to make the cooling liquid flow out of the cooling cavity naturally.

6. The cooling device of claim 1, wherein The leakage prevention agent comprises a mixture of a solidifiable liquid and graphite micropowder, wherein the graphite micropowder contains graphite particles with a particle size less than or equal to 10 microns, and the solidifiable liquid comprises rust-proof paint, asphalt paint, and / or resin-based solidifying agent.

7. The cooling device of claim 1, wherein The gas pressure of the compressed air is greater than or equal to 0.6 MPa.

8. Cooling device according to claim 7, characterized in that The preset time condition comprises more than 1 hour.

9. Cooling device according to claim 8, characterized in that The liquid level drop threshold comprises 10-20 mm.

10. Cooling device according to any of claims 1-9, characterized in that The tip electrode further has a blocking portion near the electrode opening position, the blocking portion being adapted to form an accommodation space between the outer end face of the tip electrode, the accommodation space being adapted to accommodate the cover.

11. A furnace tip electrode for a graphitization furnace, characterized by Comprising: A cooling device for a graphitization tip electrode according to any one of claims 1 to 10.

12. A graphitization furnace characterized by comprising: Comprising: A tip electrode according to claim 11.

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