High-temperature-resistant graphite crucible for purification

Abstract

The utility model discloses a high-temperature-resistant graphite crucible for purification, which comprises a lower crucible body, an upper crucible body is connected above the lower crucible body, a joint ring is arranged at the top of the upper crucible body, and a base is connected below the lower crucible body; corrugated layers are arranged on the inner wall of the lower pot body and the inner wall of the upper pot body, protruding parts are fixed to the outer surface of the lower pot body and the outer surface of the upper pot body at equal intervals, clamping blocks are fixed to the bottom of the upper pot body at equal angles, and clamping grooves are formed in the top of the lower pot body at equal angles. According to the high-temperature-resistant graphite crucible for purification, the corrugated layers are arranged on the inner walls of the upper crucible body and the lower crucible body, so that the surface area of the graphite crucible can be increased, heat distribution is more uniform, rapid heat transfer is facilitated, the high-temperature resistance of the graphite crucible is improved, the graphite crucible is divided into the lower crucible body and the upper crucible body, and joints of the lower crucible body and the upper crucible body are connected through mortises and tenons; the lower crucible body can be replaced independently, the whole crucible does not need to be scrapped, and cost is greatly saved.

Description

Technical Field

[0001] This utility model relates to the field of graphite crucible technology, specifically a high-temperature resistant graphite crucible for purification. Background Technology

[0002] Graphite crucibles are a type of crucible made from graphite, clay, silica, and wax stone. Also known as copper smelting ladles or copper melting ladles, they possess excellent chemical stability and do not react chemically with other test materials during the smelting process. However, a drawback is that existing graphite crucible assembly methods are too simplistic, relying solely on gravity and very shallow groove structures. While the assembled graphite crucible maintains acceptable stability in a vertical position, it is highly susceptible to collapse under slight tilting or external forces, such as when using crucible tongs. The stability of the graphite crucible is poor, and it is prone to collapse during use. In order to solve the above defects, the prior art (Chinese patent application number: 201920539638.0, authorized announcement date: 2020-01-21) discloses a special graphite crucible, which retains the advantage of flexible combination to adjust the capacity, while solving the problem that the graphite cylinder assembly method is too simple and prone to collapse. By using the dual cooperation of connecting block and arc groove, and locking block and locking groove, the stability of the graphite cylinder assembly is effectively improved. Meanwhile, the assembly operation of the graphite cylinder in this utility model is also very simple, requiring only two steps: insertion and rotation. The groove's limiting effect on the connecting block and the limiting slot's limiting effect on the locking block prevent the upper and lower graphite cylinders from being easily rotated in the normal assembled state. The upper graphite cylinder must be lifted before rotation can occur, thus improving the working stability of the graphite crucible assembly. When the graphite crucible is assembled, the arc-shaped strips on the upper and lower graphite cylinders cooperate with the fixing groove, further improving the assembly stability and also providing a certain degree of sealing at the contact points between the upper and lower graphite cylinders. Several connecting structures cooperate with each other, further improving the stability of the assembly and use of the upper and lower graphite cylinders.

[0003] In existing technologies, the limited contact area between the inner wall of the graphite crucible and the melt hinders rapid heat transfer, resulting in slow heating efficiency and uneven heat distribution. Furthermore, traditional graphite crucibles have poor structural strength and thermal shock resistance, making them prone to cracking during rapid heating and cooling, leading to a short service life. Additionally, the inability to directly replace the lower section of a graphite crucible means it must be scrapped when damaged, resulting in significant material waste and increased costs. Therefore, we propose a high-temperature resistant graphite crucible for purification that effectively solves these problems. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature resistant graphite crucible for purification, which solves the problems mentioned in the background art. The graphite crucible has a limited contact area between its inner wall and the melt, which is not conducive to rapid heat transfer, resulting in slow heating efficiency and uneven heat distribution. Furthermore, traditional graphite crucibles have poor structural strength and thermal shock resistance, causing them to crack during rapid heating and cooling, leading to a short service life. Additionally, the lower section of the graphite crucible cannot be directly replaced, resulting in direct scrapping when the lower section is damaged, leading to significant material waste and increased costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature resistant graphite crucible for purification, comprising a lower pot body, an upper pot body connected above the lower pot body, and a connecting ring provided at the top of the upper pot body, and a base connected below the lower pot body; further comprising: corrugated layers provided on the inner walls of the lower pot body and the upper pot body, and protrusions fixed at equal intervals on the outer surfaces of the lower pot body and the upper pot body, a locking block fixed at equal angles at the bottom of the upper pot body, a locking groove opened at equal angles at the top of the lower pot body, a limiting groove opened on the side of the locking block, and a limiting block connected at equal angles to the outer side of the lower pot body.

[0006] Preferably, the upper pot body and the lower pot body are riveted together by locking blocks and locking slots, and four locking blocks are provided, with the positions of the locking blocks and locking slots corresponding one-to-one.

[0007] Preferably, the limiting block and the limiting groove are connected by a snap-fit ​​connection, and the limiting block can be used to fix the card block.

[0008] Preferably, each of the plurality of protrusions is provided at 20 mm, and the height of the protrusion is 2 mm. The wavelength of the corrugated layer is 1-2 mm, and the corrugated layer is used to increase the surface area of ​​the lower pot body and the upper pot body.

[0009] Preferably, the inner wall and outer wall of the lower pot are respectively provided with an inner layer and an outer layer, and the inner layer is made of high-purity graphite material, while the outer layer is designed with an anti-oxidation coating.

[0010] Preferably, the base is embedded in the bottom of the lower pot body, and the bottom of the base is arranged in an arc shape.

[0011] Preferably, the edge of the connecting ring is designed with a 3-5 mm thickened layer, and the surface of the thickened layer is covered with an aluminum oxide coating.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This high-temperature resistant graphite crucible for purification, by setting a corrugated layer on the inner wall of the upper and lower pot bodies, can increase its surface area, making the heat distribution more uniform and facilitating the rapid heat transfer, and improving the high-temperature resistance of the graphite crucible. Furthermore, by dividing the graphite crucible into a lower pot body and an upper pot body, and connecting them with tenon and mortise joints, the lower pot body can be replaced separately without scrapping the entire crucible, greatly saving costs. The specific details are as follows:

[0013] (1) By setting protrusions at equal intervals on the outer surfaces of the upper and lower pot bodies, the bending stiffness is increased, and a corrugated layer is set on the inner wall of the upper and lower pot bodies to increase the surface area, disperse thermal stress, and enhance turbulence to promote uniform heating, thereby improving the high temperature resistance of the graphite crucible.

[0014] (2) The inner layer of the upper pot body and the lower pot body is made of high-purity graphite, which is corrosion resistant, and the outer layer is coated with an anti-oxidation coating, thereby balancing heat conduction and mechanical strength, and delaying oxidation and cracking.

[0015] (3) When it is necessary to replace the lower pot body, pull multiple limit blocks to separate them from the limit grooves on the card block, and at the same time pull the upper pot body upward to separate the upper pot body from the lower pot body. This makes it easy to replace the lower pot body separately without scrapping the entire crucible, which greatly saves costs and extends the overall service life. Furthermore, insert the upper pot body into the card groove on the new lower pot body through the card block to complete the splicing and assembly between the upper pot body and the lower pot body, and insert the limit block into the card groove on the card block to limit the card block.

[0016] (4) An embedded base is placed at the bottom of the graphite crucible to bear the main mechanical load and reduce the wear of the graphite crucible. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main cross-section of the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the lower pot body, upper pot body, and connecting ring of this utility model;

[0019] Figure 3 This is a schematic diagram showing the separation structure of the lower pot body, inner layer, and outer layer of this utility model;

[0020] Figure 4 This is a schematic diagram of the card block and card slot separation structure of this utility model;

[0021] Figure 5 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0022] Figure 6 This is a schematic diagram of the separation structure of the limiting block and the card block of this utility model.

[0023] In the diagram: 1. Lower pot body; 2. Upper pot body; 3. Connecting ring; 4. Base; 5. Corrugated layer; 6. Protrusion; 7. Thickened layer; 8. Locking block; 9. Limiting block; 10. Locking groove; 11. Inner layer; 12. Outer layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-6 The present invention provides the following technical solution: a high-temperature resistant graphite crucible for purification;

[0026] Example 1: To address the limitations of existing graphite crucibles, such as the limited contact area between the inner wall and the melt hindering rapid heat transfer and resulting in slow heating efficiency and uneven heat distribution, as well as the poor structural strength and thermal shock resistance of traditional graphite crucibles leading to cracking during rapid heating and cooling, resulting in a short service life, and the inability to directly replace the lower section of the graphite crucible, causing it to be scrapped upon damage and resulting in significant material waste and increased costs, the following solution is disclosed. Please refer to the following for details. Figures 1-3 and Figure 5 As shown, the system includes a lower pot body 1, with an upper pot body 2 connected above it. The lower pot body 1 has an inner layer 11 and an outer layer 12 on its inner and outer walls, respectively. The inner layer 11 is made of high-purity graphite, and the outer layer 12 is designed with an anti-oxidation coating. The upper pot body 2 has a connecting ring 3 on its top, and a base 4 is connected below the lower pot body 1. The system also includes: a corrugated layer 5 on the inner walls of the lower pot body 1 and the upper pot body 2; and protrusions 6 fixed at equal intervals on the outer surfaces of the lower pot body 1 and the upper pot body 2. Each of the multiple protrusions 6 is 20 mm high, and the wavelength of the corrugated layer 5 is 1-2 mm. The corrugated layer 5 is used to increase the surface area of ​​the lower pot body 1 and the upper pot body 2. A locking block 8 is fixed at an equal angle on the bottom of the upper pot body 2, and a locking groove 10 is opened at an equal angle on the top of the lower pot body 1. A limiting groove is opened on the side of the locking block 8, and a limiting block 9 is connected at an equal angle to the outer side of the lower pot body 1.

[0027] The upper pot body 2 and the lower pot body 1 are provided with protrusions 6 at equal intervals on their outer surfaces to increase bending stiffness. The upper pot body 2 and the lower pot body 1 are provided with corrugated layers 5 to increase surface area, disperse thermal stress, and enhance turbulence to promote uniform heating, thereby improving the high temperature resistance of the graphite crucible. The inner layer 11 of the upper pot body 2 and the lower pot body 1 is made of high-purity graphite material, which has a corrosion-resistant effect, while the outer layer 12 is coated with an anti-oxidation coating, thereby balancing heat conduction and mechanical strength and delaying oxidation and cracking.

[0028] Example 2: Unlike Example 1, this example uses a mortise and tenon joint at the interface between the upper pot body 2 and the lower pot body 1. This allows the lower pot body to be replaced separately without scrapping the entire crucible, significantly saving costs. See details for further information. Figure 1 and Figures 4-6 As shown, the upper pot body 2 and the lower pot body 1 are riveted together by the locking block 8 and the locking groove 10. There are four locking blocks 8, and the positions of the locking blocks 8 and the locking groove 10 correspond one-to-one. The limiting block 9 and the limiting groove are connected by a locking mechanism, and the locking block 8 can be fixed by the limiting block 9.

[0029] When the lower pot body 1 needs to be replaced, multiple limiting blocks 9 are pulled to separate them from the limiting grooves on the locking block 8. At the same time, the upper pot body 2 is pulled upward to separate it from the lower pot body 1. This makes it easy to replace the lower pot body 1 separately without scrapping the entire graphite crucible, which greatly saves costs and extends the overall service life. Then, the upper pot body 2 is inserted into the locking groove 10 on the new lower pot body 1 through the locking block 8 to complete the splicing and assembly between the upper pot body 2 and the lower pot body 1. The limiting blocks 9 are then inserted into the limiting grooves on the locking block 8 to limit the locking block 8.

[0030] Example 3: Unlike Example 2, this example utilizes the thickened layer 7 on the connecting ring 3 to reduce the weak points of the high-temperature graphite oxide crucible. See details... Figure 1 and Figure 2 As shown, the edge of the connecting ring 3 is designed with a 3-5mm thickened layer 7, and the surface of the thickened layer 7 is covered with an aluminum oxide coating. The base 4 is embedded in the bottom of the lower pot body 1, and the bottom of the base 4 is set in an arc shape.

[0031] A thickened layer 7 is provided on the edge of the connecting ring 3, and an alumina coating is applied to the surface of the thickened layer 7. This reduces the weak points of the high-temperature graphite crucible. A base 4 is embedded at the bottom of the graphite crucible to bear the main mechanical load and reduce the wear of the graphite crucible.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-temperature resistant graphite crucible for purification, comprising a lower pot body (1), an upper pot body (2) connected above the lower pot body (1), and a connecting ring (3) provided on the top of the upper pot body (2), and a base (4) connected below the lower pot body (1); characterized in that, Also includes: The inner walls of the lower pot body (1) and the upper pot body (2) are provided with corrugated layers (5), and the outer surfaces of the lower pot body (1) and the upper pot body (2) are fixed with protrusions (6) at equal intervals. The bottom of the upper pot body (2) is fixed with a locking block (8) at equal angles. The top of the lower pot body (1) is provided with a locking groove (10) at equal angles. The side of the locking block (8) is provided with a limiting groove. The outer side of the lower pot body (1) is connected with a limiting block (9) at equal angles.

2. The high-temperature resistant graphite crucible for purification according to claim 1, characterized in that: The upper pot body (2) and the lower pot body (1) are riveted together by a locking block (8) and a locking groove (10), and there are four locking blocks (8), and the positions of the locking blocks (8) and the locking grooves (10) correspond one-to-one.

3. The high-temperature resistant graphite crucible for purification according to claim 1, characterized in that: The limiting block (9) and the limiting groove are connected by a snap-fit ​​connection, and the limiting block (9) can be used to fix the card block (8).

4. The high-temperature resistant graphite crucible for purification according to claim 1, characterized in that: Each of the protrusions (6) is provided at 20 mm, and the height of the protrusion (6) is 2 mm. The wavelength of the corrugated layer (5) is 1-2 mm, and the corrugated layer (5) is used to increase the surface area of ​​the lower pot body (1) and the upper pot body (2).

5. The high-temperature resistant graphite crucible for purification according to claim 1, characterized in that: The inner wall and outer wall of the lower pot body (1) are respectively provided with an inner layer (11) and an outer layer (12), and the inner layer (11) is made of high-purity graphite material, and the outer layer (12) is designed with an anti-oxidation coating.

6. The high-temperature resistant graphite crucible for purification according to claim 1, characterized in that: The base (4) is embedded in the bottom of the lower pot body (1), and the bottom of the base (4) is set in an arc shape.

7. The high-temperature resistant graphite crucible for purification according to claim 1, characterized in that: The joint ring (3) has a 3-5 mm thickened layer (7) along its edge, and the surface of the thickened layer (7) is covered with an aluminum oxide coating.

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