Graphite purification device

Abstract

The invention belongs to the technical field of graphite purification equipment, and provides a graphite purification device which comprises a furnace body provided with a furnace chamber, and further comprises a first electrode plate and a second electrode plate which are arranged in the furnace chamber and electrically connected with a positive electrode and a negative electrode of an input circuit respectively; wherein the first electrode plate and the second electrode plate are sequentially arranged in a spaced mode in the longitudinal direction, a graphite purification area used for containing a graphite prefabricated body is formed between the first electrode and the second electrode, and in the working state, the graphite prefabricated body placed in the graphite purification area can abut against the first electrode plate and the second electrode plate; therefore, the first electrode plate and the second electrode plate can directly heat the graphite preform. The graphite purification device provided by the invention can be used for directly heating the graphite preform, and is relatively small in heat loss and relatively low in cost.

Description

Technical Field

[0001] The present invention relates to the technical field of graphite purification equipment, and particularly relates to a graphite purification device. Background Art

[0002] Due to its many advantages such as low density, corrosion resistance, radiation resistance, self-lubrication, and resistance to high and low temperatures, graphite is widely used in industries such as electricity, metallurgy, national defense and aerospace, energy, and chemical industry. It plays a decisive and crucial role in emerging industries such as the preparation of third-generation semiconductor materials, the nuclear industry, and the photovoltaic industry. However, in high-end fields such as electronic information and aerospace, the fixed carbon content of graphite needs to be above 99.99%. Therefore, it is necessary to purify graphite to meet the relevant requirements.

[0003] To obtain high-purity graphite with a fixed carbon content above 99.99%, it is necessary to purify graphite by high-temperature chemical methods. The current graphite purification device heats the entire furnace cavity by the electrodes generating heat and transferring the heat to the entire furnace cavity to heat the graphite preform. Inevitably, a large amount of heat loss will occur during the entire heat transfer process, resulting in high costs. Summary of the Invention

[0004] Aiming at the defects in the prior art, the purpose of the present invention is to provide a graphite purification device to solve or alleviate one or more of the above-mentioned technical problems and other aspects in the prior art.

[0005] To achieve the above purpose, the present invention provides a graphite purification device, including a furnace body having a furnace cavity, and further including a first electrode plate and a second electrode plate disposed in the furnace cavity and electrically connected to the positive and negative electrodes of the input circuit respectively;

[0006] Wherein, the first electrode plate and the second electrode plate are arranged at intervals longitudinally in sequence, and a graphite purification area for placing a graphite preform is formed between the first electrode and the second electrode. In the working state, the graphite preform placed in the graphite purification area can be in contact with the first electrode plate and the second electrode plate, so that the first electrode plate and the second electrode plate can directly heat the graphite preform.

[0007] Further, the first electrode plate and the second electrode plate are of a porous structure.

[0008] Further, there are m first electrode plates and n second electrode plates, where n = m or n = m + 1, and m ≥ 2, and the m first electrode plates and the n second electrode plates are arranged alternately at intervals longitudinally in sequence.

[0009] Further, the first target electrode plate is fixedly connected to the furnace body, and the remaining electrode plates are slidably connected to the furnace body, so that the height of the graphite purification area can be adjusted according to the size of the target graphite preform, wherein the first target electrode plate is the electrode plate located at the bottommost position.

[0010] Further, an adjustment assembly is further included, and the adjustment assembly is used to adjust the height of the graphite purification area. The adjustment assembly includes:

[0011] A scissor structure, which is made of an insulating material, the scissor structure corresponds to the graphite purification area, a first end of the scissor structure is connected to the first electrode plate, and a second end is connected to the second electrode plate; and

[0012] A lifting assembly, which is used to drive the second target electrode plate to move up and down, wherein the second target electrode plate is the electrode plate located at the uppermost position.

[0013] Further, a first side of the first end of the scissor structure is hinged to the first electrode plate, and a second side is hinged to a slider, and the slider is slidably connected to the first electrode plate;

[0014] A first side of the second end of the scissor structure is hinged to the second electrode plate, and a second side is hinged to a slider, and the slider is movably connected to the second electrode plate.

[0015] Further, the first sliders at opposite ends of two adjacent scissor structures are fixedly connected, and at the same time, the second sliders at opposite ends of two adjacent scissor structures are fixedly connected, so that two adjacent scissor structures can be deployed or folded synchronously.

[0016] Further, the lifting structure includes:

[0017] A lead screw, whose axis is arranged longitudinally, and the lead screw is rotatably connected to the furnace body;

[0018] A nut, which is fixedly connected to the second target electrode plate, and the nut is sleeved on the lead screw and is in transmission connection with the lead screw; and

[0019] A motor, which is fixedly connected to the furnace body, and a power output shaft of the motor is in transmission connection with a power input end of the lead screw.

[0020] Advantages of the present invention:

[0021] The graphite purification device provided by the present invention, by arranging the first electrode plate and the second electrode plate, enables the first electrode plate and the second electrode plate to directly heat the graphite preform during the purification process of the graphite preform, reducing heat loss and saving costs. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0023] Figure 1 A perspective view of the graphite purification device provided by an embodiment of the present invention;

[0024] Figure 2 For Figure 1 A perspective view of the graphite purification device shown in the open state;

[0025] Figure 3 For Figure 1 A sectional perspective view of the graphite purification device shown;

[0026] Figure 4 For Figure 1 An internal structure perspective view of the graphite purification device shown;

[0027] Figure 5 For Figure 4 An enlarged view of part A shown.

[0028] Reference numerals:

[0029] 100, furnace body; 110, furnace cavity; 120, guide rod; 210, first electrode plate; 220, second electrode plate; 310, scissor structure; 321, lead screw; 322, nut; 323, motor; 330, first slider; 340, first fixing block; 350, second slider; 360, second fixing block; 400, sliding member. Specific embodiments

[0030] The following will describe in detail the embodiments of the technical solutions of the present invention in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and therefore are only examples and cannot be used to limit the protection scope of the present invention.

[0031] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present invention belongs.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0033] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0034] In the present application, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0036] As Figures 1-5 shown, the present invention provides a graphite purification device, including a furnace body 100, and the furnace body 100 has a furnace cavity 110. Of course, it also includes a heat preservation system for reducing heat dissipation in the furnace body 100, a vacuum system for evacuating the furnace body 100, and an inflation system for filling the furnace body 100 with purification gas (such as argon, chlorodifluoromethane, dichlorodifluoromethane, chlorotrifluoromethane, etc.). These are all prior arts and will not be elaborated here too much, and are not shown in the drawings either.

[0037] In an embodiment, the graphite purification device further includes a first electrode plate 210 and a second electrode plate 220, and the first electrode plate 210 and the second electrode plate 220 are conductive. In this embodiment, the first electrode plate 210 and the second electrode plate 220 are made of a carbon-carbon composite material. The first electrode plate 210 and the second electrode plate 220 are disposed in the furnace chamber 110, and the first electrode plate 210 and the second electrode plate 220 are electrically connected to the positive electrode and the negative electrode of the input circuit, respectively. Specifically, the first electrode plate 210 and the second electrode plate 220 are electrically connected to the positive electrode and the negative electrode of the external input circuit through wires, respectively, so as to heat and purify the graphite preform placed in the purification area.

[0038] Wherein, the first electrode plate 210 and the second electrode plate 220 are sequentially arranged at intervals along the longitudinal direction, and a graphite purification area for placing the graphite preform is formed between the first electrode and the second electrode. When the graphite preform is placed in the graphite purification area, the graphite preform abuts against the first electrode plate 210 and the second electrode plate 220 to directly heat the graphite preform.

[0039] During use, the furnace body 100 is opened, the graphite preform is placed in the graphite purification area, and the graphite preform abuts against the first electrode plate 210 and the second electrode plate 220, so that a current loop is formed through the first electrode plate, the graphite preform and the second electrode plate to directly heat the graphite preform, reducing other redundant heat transfer processes, thereby reducing heat loss and further reducing costs.

[0040] In this embodiment, by directly heating the graphite preform through the first electrode plate 210 and the second electrode plate 220, other redundant heat transfer processes are reduced, thereby reducing heat loss and further reducing costs.

[0041] As Figure 2 、 3 、4 shows, in this embodiment, both the first electrode plate 210 and the second electrode plate 220 are porous structures, so that the graphite preform can be in full contact with the purification gas.

[0042] As Figure 2 、 3 、4 shows, in this embodiment, there are m first electrode plates 210 and n second electrode plates 220, where n = m or n = m + 1, and m ≥ 2, and the m first electrode plates 210 and the n second electrode plates 220 are alternately arranged at intervals along the longitudinal direction.

[0043] In this embodiment, by providing a plurality of first electrode plates 210 and second electrode plates 220, a plurality of graphite purification areas are formed, thereby achieving the purpose of improving the purification efficiency.

[0044] As Figure 3As shown, in this embodiment, the first target electrode plate is fixedly connected to the furnace body 100, and the remaining electrode plates are slidably connected to the furnace body 100 so that the height of the graphite purification area can be adjusted according to the size of the target graphite preform. Among them, the first target electrode plate is the electrode plate located at the bottommost position.

[0045] It should be noted here that the electrode plate located at the bottommost position (i.e., the first target electrode plate) refers to the electrode plate located at the bottommost position among all electrode plates (including the first electrode plate 210 and the second electrode plate 220). When the electrode plate located at the bottommost position is the first electrode plate 210, the first target electrode plate is the first electrode plate 210; when the electrode plate located at the bottommost position is the second electrode plate 220, the first target electrode plate is the second electrode plate 220.

[0046] Specifically, a guide rod 110 is provided in the furnace body 100, and sliding members 400 adapted to the guide rod 110 are provided at both ends of the electrode plate. The sliding member 400 is fixedly connected to the electrode plate, and the sliding member 400 is slidably sleeved on the guide rod 110.

[0047] The remaining electrode plates include all the first electrode plates 210 and the second electrode plates 220 except the first target electrode plate.

[0048] Specifically, when n = m, the electrode plate located at the bottommost position can be either the first electrode plate 210 or the second electrode plate 220, so the first target electrode plate can be either the first electrode plate 210 or the second electrode plate 220. When n = m + 1, the electrode plate located at the bottommost position can only be the second electrode plate 220, so the first target electrode plate can only be the second electrode plate 220.

[0049] In this embodiment, by setting the height of the graphite purification area to be adjustable so that it can be adjusted according to the size of the target graphite preform, the graphite purification device provided in this embodiment can purify graphite preforms of different sizes, improving the versatility of the entire device.

[0050] Such as Figure 3 、 4 、as shown in FIG. 5, in this embodiment, the graphite purification device further includes an adjustment assembly, and the adjustment assembly is used to change the height of the graphite purification area (i.e., the distance between the first electrode plate 210 and the adjacent second electrode plate 220 and the distance between the second electrode plate 220 and the adjacent first electrode plate 210). The adjustment assembly includes a scissor structure 310 and a lifting structure.

[0051] The scissor structure 310 is made of insulating material. The scissor structure 310 corresponds to the graphite purification area. The first end of the scissor structure 310 is connected to the first electrode plate 210, and the second end is connected to the second electrode plate 220. The lifting structure is used to drive the second target electrode plate to move up and down. Among them, the second target electrode plate is the electrode plate located at the uppermost position.

[0052] It should be noted that the electrode plate located at the uppermost position is the electrode plate located at the uppermost position among all electrode plates (including the first electrode plate 210 and the second electrode plate 220). When the electrode plate located at the uppermost position is the first electrode plate 210, the second target electrode plate is the first electrode plate 210. When the electrode plate located at the uppermost position is the second electrode plate 220, the second target electrode plate is the second electrode plate 220.

[0053] Specifically, when n = m, the electrode plate located at the uppermost position can be either the first electrode plate 210 or the second electrode plate 220. Then the second target electrode plate can be either the first electrode plate 210 or the second electrode plate 220. When n = m + 1, the electrode plate located at the uppermost position can only be the second electrode plate 220. Then the second target electrode plate can only be the second electrode plate 220.

[0054] During use, when the lifting structure drives the second target electrode plate to rise, the second target electrode plate pulls the corresponding electrode plate to rise through the scissor structure 310. During this process, each scissor structure 310 is successively unfolded, so as to achieve the purpose of increasing the height of the graphite purification area.

[0055] When the lifting structure drives the second target electrode plate to descend, under the action of gravity, the remaining first electrode plates 210 and second electrode plates 220 descend. During this process, the scissor structure 310 folds, so as to achieve the purpose of reducing the height of the graphite purification area.

[0056] In this embodiment, by setting the adjusting component to automatically adjust the height of the graphite purification area, the operation is simple and the purification efficiency is improved.

[0057] As Figure 3 、 4 、shown in 5, the first side of the first end of the scissor structure 310 is hinged to the first electrode plate 210, and the second side is movably connected to the first electrode plate 210 through the first slider 330.

[0058] Specifically, the first side of the first end of the scissor structure 310 is hinged to the first fixing block 340. The first fixing block 340 is fixedly connected to the first electrode plate 210. The second side of the first end of the scissor structure 310 is hinged to the first slider 330, and the first slider 330 is slidably connected to the first electrode plate 210.

[0059] One side of the second end of the scissor structure 310 is hinged to the second electrode plate 220, and the other side is movably connected to the second electrode plate 220 through the second slider 350. Specifically, one side of the second end of the scissor structure 310 is hinged to the second fixing block 360, and the second fixing block 360 is fixedly connected to the second electrode plate 220. The other side of the second end of the scissor structure 310 is hinged to the second slider 350, and the second slider 350 is slidably connected to the second electrode plate 220.

[0060] As Figure 5 shown, the first sliders 330 at the opposite ends of two adjacent scissor structures 310 up and down are fixedly connected. At the same time, the second sliders 350 at the opposite ends of two adjacent scissor structures are fixedly connected, so that two adjacent scissor structures 310 can be deployed or folded synchronously, so that the heights of all graphite purification areas can be changed synchronously. At the same time, it is not necessary to wait for the upper scissor structure 310 to be deployed to the maximum extent before pulling the corresponding electrode plate to move. When purifying a smaller graphite preform, the stroke of the second target electrode plate can be reduced, which can improve the purification efficiency. At the same time, it can also shorten the activation time of the lifting structure and reduce power consumption.

[0061] In this embodiment, the two adjacent first sliders 330 up and down are integrally formed, and the two adjacent second sliders 350 up and down are integrally formed.

[0062] As Figure 3 、 4 shown, the lifting structure includes a lead screw 321, a nut 322 and a motor 323.

[0063] The axis line of the lead screw 321 is arranged longitudinally, and the lead screw 321 is rotatably connected to the furnace body 100. The nut 322 is fixedly connected to the second target electrode plate. The nut 322 is sleeved on the lead screw 321 and is in transmission connection with the lead screw 321, so that when the lead screw 321 rotates, the nut 322 can be driven to move. The motor 323 is fixedly connected to the furnace body 100, and the power output shaft of the motor 323 is in transmission connection with the power input end of the lead screw 321.

[0064] During use, the motor 323 drives the lead screw 321 to rotate, thereby driving the nut 322 to move up and down, and then driving the second target electrode plate to move up and down through the nut 322. Specifically, when the motor 323 drives the lead screw 321 to rotate in the positive direction, the lead screw 321 drives the nut 322 to move upward, thereby driving the second target electrode plate to rise; when the motor 323 drives the lead screw 321 to rotate in the reverse direction, the lead screw 321 drives the nut 322 to move downward, thereby driving the second electrode plate 220 to descend.

[0065] In this embodiment, the lifting structure includes a lead screw 321, a nut 322, and a motor 323. By driving the nut 322 to rotate forward and backward by the motor 323, the purpose of driving the second target electrode plate to move up and down is achieved. The structure is simple, and the motor 323, the lead screw 321, and the nut 322 can accurately position the second target electrode plate.

[0066] In the description of the present invention, a large number of specific details are set forth. However, it can be understood that the embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and technologies have not been shown in detail so as not to obscure the understanding of this specification.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A graphite purification device, comprising a furnace body (100), the furnace body (100) having a furnace cavity (110), characterized in that, It further includes a first electrode plate (210) and a second electrode plate (220) disposed in the furnace cavity (110) and electrically connected to the positive and negative electrodes of the input circuit respectively; Wherein, the first electrode plate (210) and the second electrode plate (220) are arranged at intervals in sequence along the longitudinal direction, and a graphite purification area for placing a graphite preform is formed between the first electrode and the second electrode. In the working state, the graphite preform placed in the graphite purification area can contact the first electrode plate (210) and the second electrode plate (220), so that the first electrode plate (210) and the second electrode plate (220) can directly heat the graphite preform.

2. The graphite purification device according to claim 1, characterized in that, The first electrode plate (210) and the second electrode plate (220) are of porous structure.

3. The graphite purification device according to claim 1 or 2, characterized in that, There are m first electrode plates (210) and n second electrode plates (220), where n = m or n = m + 1, and m ≥ 2, and the m first electrode plates (210) and the n second electrode plates (220) are arranged alternately at intervals in sequence along the longitudinal direction.

4. The graphite purification device according to claim 3, characterized in that, The first target electrode plate is fixedly connected to the furnace body (100), and the remaining electrode plates are slidably connected to the furnace body (100) so that the height of the graphite purification area can be adjusted according to the size of the target graphite preform. Among them, the first target electrode plate is the electrode plate located at the bottommost.

5. The graphite purification device according to claim 4, wherein It further includes an adjustment assembly for adjusting the height of the graphite purification area. The adjustment assembly includes: A scissor structure (310) made of an insulating material, corresponding to the graphite purification area, with the first end of the scissor structure (310) connected to the first electrode plate (210) and the second end connected to the second electrode plate (220); and A lifting assembly for driving the second target electrode plate to move up and down. Among them, the second target electrode plate is the electrode plate located at the uppermost.

6. The graphite purification device according to claim 5, characterized in that, The first side of the first end of the scissor structure (310) is hinged to the first electrode plate (210), and the second side is hinged to a first slider (330), and the first slider (330) is slidably connected to the first electrode plate (210); The first side of the second end of the scissor structure (310) is hinged to the second electrode plate (220), and the second side is hinged to a second slider (350), and the second slider (350) is movably connected to the second electrode plate (220).

7. The graphite purification device according to claim 6, wherein, The first sliders (330) at the opposite ends of two adjacent scissor structures (310) up and down are fixedly connected. At the same time, the second sliders (350) at the opposite ends of two adjacent scissor structures (310) up and down are fixedly connected, so that two adjacent scissor structures (310) can be unfolded or folded synchronously.

8. The graphite purification device according to claim 5 or 6 or 7, characterized in that, The lifting structure includes: A lead screw (321) whose axis is arranged longitudinally, and the lead screw (321) is rotatably connected to the furnace body (100); A nut (322) which is fixedly connected to the second target electrode plate, the nut (322) is sleeved on the lead screw (321) and is in transmission connection with the lead screw (321); and A motor (323) which is fixedly connected to the furnace body (100), and a power output shaft of the motor (323) is in transmission connection with a power input end of the lead screw (321).

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