Graphite parts purification furnace

Abstract

The present invention proposes a graphite component purification furnace structure for purifying graphite components. The graphite component purification furnace includes: a furnace body, a retaining frame and a heat preservation sleeve; a cavity for accommodating graphite components is provided inside the furnace body, and an air intake pipe for reactant gas to enter, an exhaust pipe for exhausting gas, and an electrode for providing reaction conditions are respectively penetrated inside the furnace body; the retaining frame is fixedly arranged in the furnace body, and the air intake pipe, the exhaust pipe and the electrode are respectively fixed on the circumference of the retaining frame; the heat preservation sleeve is fixedly arranged between the furnace body and the retaining frame, and the furnace body, the heat preservation sleeve and the retaining frame are coaxial; wherein, when the furnace body is closed, a closed space is formed inside the heat preservation sleeve to prevent the leakage of reactant gas, thereby enhancing the corrosion resistance inside the furnace body. The present invention isolates the contact between the reactant gas and the inner wall of the furnace body through the heat preservation sleeve, thereby improving the corrosion resistance of the graphite component purification furnace.

Description

Technical Field

[0001] The invention relates to the technical field of graphite component purification, in particular to a graphite component purification furnace. Background Art

[0002] During the production and processing of graphite parts, various metal elements such as boron, phosphorus, arsenic, etc. will inevitably be mixed into the surface and interior of the graphite parts. These impurity elements will affect the use of graphite parts in production. At present, high-temperature calcination is often used to purify graphite parts. However, existing equipment is easily corroded during the process of purifying graphite parts using high-temperature calcination. Summary of the invention

[0003] In order to solve the problem that the existing equipment mentioned in the background technology is easily corroded during the process of purifying graphite parts by high-temperature calcination, the present invention adopts the following technical solution:

[0004] A graphite parts purification furnace is used for purifying graphite parts, and the graphite parts purification furnace comprises: a furnace body, a retaining frame and a heat preservation sleeve;

[0005] A cavity for accommodating the graphite component is provided inside the furnace body, and an inlet pipe for the reaction gas to enter, an exhaust pipe for exhausting the gas, and an electrode for providing reaction conditions are respectively penetrated inside the furnace body;

[0006] The retainer is fixedly arranged in the furnace body, and the air intake pipe, the exhaust pipe and the electrode are respectively fixed on the circumferential surface of the retainer;

[0007] The heat-insulating sleeve is fixedly arranged between the furnace body and the retaining frame, and the furnace body, the heat-insulating sleeve and the retaining frame are coaxial;

[0008] When the furnace body is closed, a closed space is formed in the insulation sleeve to prevent the reaction gas from leaking out, thereby enhancing the corrosion resistance of the furnace body.

[0009] Wherein, two opposite sections of tracks are arranged in the furnace body, one side of each section of the track is horizontal and supports the thermal insulation sleeve, and the other side of each section of the track is fixedly connected to the inner wall of the furnace body.

[0010] Furthermore, a plurality of mounting columns extending axially along the furnace body and evenly arranged are provided between the two sections of the track.

[0011] Furthermore, the thermal insulation sleeve is a cylindrical body made of graphite carbon felt.

[0012] Furthermore, the retaining frame is a steel frame made of carbon-carbon composite material and nickel-based alloy.

[0013] Furthermore, a storage platform is also provided in the furnace body, one side of the storage platform is used to support the graphite component, and the other side of the storage platform is fixedly mounted on the mounting column.

[0014] Furthermore, the storage table includes multiple layers of trays, and two adjacent layers of the trays are connected by multiple supporting columns.

[0015] Furthermore, each of the air intake pipes and each of the exhaust pipes is a graphite sleeve.

[0016] Beneficial effect: The present invention isolates the contact between the reaction gas and the inner wall of the furnace body through the insulation sleeve, thereby improving the corrosion resistance of the graphite component purification furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a graphite component purification furnace according to an embodiment of the present invention, wherein the gate is omitted.

[0018] Figure 2 Schematic diagram of the furnace structure according to an embodiment of the present invention, in which the retaining frame, the insulation sleeve and the gate are omitted. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present application clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0021] Figure 1 is a schematic structural diagram of a graphite component purification furnace according to an embodiment of the present invention, wherein the gate is omitted.

[0022] Reference Figure 1The entire graphite component purification furnace is arranged in the production workshop of the graphite component 1, and the graphite component purification furnace includes: a furnace body 2, a retaining frame 3, and an insulation sleeve 4. Among them, the entire furnace body 2 is cylindrical as a whole, and a cavity is provided in the furnace body 2. One end of the furnace body 2 is closed, and the other end of the furnace body 2 is provided with an openable and closable gate. The interior of the furnace body 2 is respectively connected with a plurality of air intake pipes 21 and exhaust pipes 22, and an electrode 23 is also provided in the furnace body 2. The retaining frame 3 is arranged in the furnace body 2, and the shaft body of the retaining frame 3 is respectively fixed with a plurality of air intake pipes 21, exhaust pipes 22 and electrodes 23. The insulation sleeve 4 is flexible, and a plurality of air intake pipes 21, exhaust pipes 22 and electrodes 23 are arranged around it. The insulation sleeve 4 is arranged in the furnace body 2, and the insulation sleeve 4 is located between the furnace body 2 and the retaining frame 3, one end of the insulation sleeve 4 is abutted with the closed end of the furnace body 2, and the other end of the insulation sleeve 4 is abutted with the gate. The holder 3 is arranged in the furnace body 2, and the holder 3, the insulation sleeve 4 and the furnace body 2 are coaxial. The furnace body 2 is provided with opposite rails 6 at both ends, one side of each rail 6 is horizontal and receives the insulation sleeve 4, and the other side of each rail 6 is connected to the inside of the furnace body 2.

[0023] During the purification of the graphite component 1, the air inlet pipe 21, the exhaust pipe 22 and the electrode 23 are always located inside the insulation sleeve 4. After the gate is closed, the furnace body 2 is sealed, thereby forming a closed space inside the insulation sleeve 4 to prevent the reaction gas from leaking out.

[0024] Figure 2 Schematic diagram of the structure of a furnace body according to an embodiment of the present invention, in which a retaining frame, a heat-insulating sleeve and a gate are omitted.

[0025] Specifically, refer to Figure 1 and Figure 2 In this embodiment, there are two air intake pipes 21. One end of the first air intake pipe 211 is connected to the reaction gas storage device, and the other end of the first air intake pipe 211 is fixed to the shaft body of the holder 3; one end of the second air intake pipe 212 is connected to the protective gas storage device, and the other end of the second air intake pipe 212 is fixed to the shaft body on one side of the holder 3. The electrodes 23 are arranged in pairs on the inner wall of the furnace body 2, one end of each electrode 23 is connected to the external power supply, and the other end of each electrode 23 is fixed to the shaft body of the holder 3. One end of the exhaust pipe 22 is connected to the vacuum equipment, and the other end of the exhaust pipe 22 extends into the inner wall of the furnace body 2 of the graphite component purification furnace. Among them, the first air intake pipe 211, the second air intake pipe 212, the electrode 23 and the exhaust pipe 22.

[0026] Before purifying the graphite component 1, the second air inlet pipe 212 is opened, the gate is closed, the exhaust pipe 22 is opened, and the protective gas storage device continuously delivers protective gas to the graphite component purification furnace and discharges impurity gas inside the graphite component purification furnace.

[0027] Specifically, the graphite component 1 purification also includes a storage table 5 for carrying the graphite component 1. Between the two sections of the track 6 in the furnace body 2, there are mounting columns 24 evenly arranged along the extension direction of the furnace body 2, and the storage table 5 is installed and fixed on the mounting columns 24. There are multiple layers of trays 51 in the storage table 5, and two adjacent layers of trays 51 are connected by multiple support columns 52.

[0028] Specifically, in the present embodiment, the storage table 5 includes two layers of trays 51, each of which is provided with a through hole. Among them, the tray 51 close to the track 6 is the lower tray 511, and the tray 51 away from the track 6 is the upper tray 512. The lower tray 511 has a plurality of mounting openings 53 on both opposite sides, and one side of the lower tray 511 carries the graphite component 1, and the mounting openings 53 on the other side of the lower tray 511 are connected to the through holes of the mounting column 24 through the support column 52. One side of the upper tray 512 carries the graphite component 1, and the other side of the upper tray 512 has a plurality of mounting openings 53. The lower tray 511 and the upper tray 512 are connected by the support column 53 to the respective mounting holes 53 on the opposite sides of the two, so that the upper tray 512 is fixed on the lower tray 511. In other embodiments, the number of layers of the trays 51 in the storage table 5 can also be three layers, four layers or more, which is specifically set to match the size of the graphite component purification furnace.

[0029] Preferably, the inner wall of the furnace body 2 is treated with corrosion resistance, and a nickel alloy protective layer is coated on the inner wall of the furnace body 2. The insulation sleeve 4 is a cylindrical body made of graphite carbon felt, and the retaining frame 3 is a steel frame made of carbon-carbon composite material and nickel-based alloy. The first air intake pipe 211, the second air intake pipe 212 and the exhaust pipe 22 are all graphite sleeves, and the electrode 23 selected in the graphite component purification furnace is a graphite electrode.

[0030] In this embodiment, the reaction gas is chlorine and the protective gas is nitrogen. Before the graphite component 1 is purified, the second air inlet pipe 212 fills a large amount of nitrogen into the graphite component purification furnace. After a period of time, the exhaust pipe 22 is opened, and the vacuum machine extracts the gas in the graphite component purification furnace from the exhaust pipe 22. When the gas detector arranged outside the exhaust pipe 22 detects that the exhausted gas is all nitrogen, the second air inlet pipe 212 is closed first, and after the gas pressure in the graphite component purification furnace stabilizes to the set threshold, the exhaust pipe 22 is closed, and then the electrode 23 is started to heat the inside of the graphite component purification furnace.

[0031] After the temperature in the graphite component purification furnace is raised to 600°, the temperature in the graphite component purification furnace is stabilized, the first air inlet pipe 211 is opened, and the reaction gas storage device fills chlorine into the graphite component purification furnace. Metal impurities such as P (phosphorus) and B (boron) in the graphite component 1 undergo oxidation reactions with chlorine in the graphite component purification furnace to form chlorides. After the chlorine is introduced for a certain period of time, the power supply is turned off first, the electrode 23 is powered off, and then the first air inlet pipe 211 is closed, and finally the exhaust pipe 22 and the second air inlet pipe 212 are opened, and nitrogen is filled into the graphite component purification furnace and the residual chlorine after the purification of the graphite component 1 in the graphite component purification furnace and the impurity gas generated during the purification process are discharged through nitrogen replacement. After the gas detector set outside the exhaust pipe 22 detects that there is no chlorine in the exhaust gas, the exhaust pipe 22 is closed to complete the purification of the graphite component 1.

[0032] In summary, the present invention isolates the contact between the reaction gas and the inner wall of the furnace body through the insulation sleeve, thereby improving the corrosion resistance of the graphite component purification furnace. Furthermore, the design of the multi-layer storage table makes further use of the space in the furnace, and multiple graphite components can be purified at one time.

[0033] The foregoing describes certain embodiments of the present invention. Other embodiments are within the scope of the following claims.

[0034] The terms "exemplary," "example," and the like used throughout this specification mean "used as an example, instance, or illustration" and do not mean "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques can be implemented without these specific details. In some instances, in order to avoid obscuring the concepts of the described embodiments, well-known structures and devices are shown in block diagram form.

[0035] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0036] The above description of the contents of this specification is provided to enable any person of ordinary skill in the art to implement or use the contents of this specification. Various modifications to the contents of this specification will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of protection of the contents of this specification. Therefore, the contents of this specification are not limited to the examples and designs described herein, but are consistent with the widest range of principles and novel features disclosed herein.

Claims

1. A graphite parts purification furnace for purifying graphite parts (1), characterized in that: The graphite component purification furnace comprises: a furnace body (2), a retaining frame (3), a heat-insulating sleeve (4), and a storage table (5); The furnace body (2) is provided with a cavity for accommodating the graphite component (1), and the furnace body (2) is provided with an inlet pipe (21) for allowing reaction gas to enter, an exhaust pipe (22) for exhausting gas, and an electrode (23) for providing reaction conditions. The retaining frame (3) is fixedly arranged in the furnace body (2), and the air intake pipe (21), the exhaust pipe (22) and the electrode (23) are respectively fixed on the circumferential surface of the retaining frame (3); The heat-insulating sleeve (4) is fixedly arranged between the furnace body (2) and the retaining frame (3); the heat-insulating sleeve (4) is a cylindrical body made of graphite carbon felt; and the furnace body (2), the heat-insulating sleeve (4) and the retaining frame (3) are coaxial; One side of the storage platform (5) is used to support the graphite component (1), and the other side of the storage platform (5) is fixedly mounted on the mounting column (24); When the furnace body (2) is sealed, a closed space is formed inside the thermal insulation sleeve (4) to prevent leakage of reaction gas, thereby enhancing the corrosion resistance of the interior of the furnace body (2).

2. The graphite parts purification furnace according to claim 1, characterized in that: Two opposite rails (6) are arranged in the furnace body (2), one side of each rail (6) is horizontal and supports the thermal insulation sleeve (4), and the other side of each rail (6) is fixedly connected to the inner wall of the furnace body (2).

3. The graphite parts purification furnace according to claim 2, characterized in that: A plurality of mounting posts (24) extending axially along the furnace body (2) and arranged evenly are provided between the two sections of the track.

4. The graphite parts purification furnace according to claim 1, characterized in that: The retaining frame (3) is a steel frame made of a carbon-carbon composite material and a nickel-based alloy.

5. The graphite parts purification furnace according to claim 4, characterized in that: The storage platform (5) comprises multiple layers of trays (51), and two adjacent layers of the trays (51) are connected via multiple support columns (52).

6. The graphite parts purification furnace according to any one of claims 1 to 5, characterized in that: Each of the air inlet pipes (21) and each of the air exhaust pipes (22) is a graphite sleeve.

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