Graphite mold for preparing cast high-purity zirconia brick

Abstract

The invention discloses a graphite mold for casting high-purity zirconia brick preparation, and particularly relates to the field of graphite molds, the graphite mold comprises a supporting box and a graphite mold body located at the top of the supporting box, the top of the graphite mold body is provided with a mold cavity used for casting high-purity zirconia bricks, and a protective frame used for collision protection is arranged at an opening in the top of the mold cavity. According to the graphite mold heating device, firstly, through cooperation of the arranged electrode plate and the conducting rod, the graphite mold can be uniformly heated during electrifying heating, so that the temperature is diffused from the middle to the periphery, the situation that local overheating damage is caused due to uneven heating transfer is avoided, and the preheating effect is improved; and through the arranged protection frame, the situation that the graphite mold is damaged due to collision with the graphite mold when high-temperature zirconium oxide liquid is cast can be avoided, the protection effect is achieved, meanwhile, abrasion to an opening of the mold cavity during demolding can be avoided, the service life is prolonged, and meanwhile the forming effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of graphite molds, and more specifically, the present invention relates to a graphite mold for the preparation of fused high-purity zirconia bricks. Background Art

[0002] Fused refractories play a crucial role in high-temperature industries such as steel, glass, ceramics, etc. Zirconia has a high melting point, good chemical stability, and excellent thermal shock resistance, and is an ideal refractory material;

[0003] In modern industry, high-purity zirconia bricks are widely used in high-temperature fields such as metallurgy, glass, ceramics, etc. due to their excellent high-temperature resistance, wear resistance, chemical stability, etc. When preparing fused high-purity zirconia bricks, the mixed raw materials need to be hot-melted at high temperature, and then poured into a preheated graphite mold for casting. After that, the formed brick blank is put into an annealing furnace for annealing to eliminate internal stress, which is convenient for later cutting and processing of the brick blank into zirconia bricks of the required size and shape. Among them, the quality of the graphite mold will directly affect the quality of the finished product;

[0004] The existing graphite molds have a simple structure. During demolding and casting, it is easy to cause collisions or abrasions on the opening edges of the mold cavity by the casting equipment or the finished zirconia bricks, which affects the later forming quality. Moreover, since the graphite mold needs to be preheated before use, and it is heated to the preset temperature by simply fixing electrode rods on both sides of the mold, it is easy to cause uneven temperature transfer of the graphite mold, resulting in local overheating and damage such as cracks of the graphite mold. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a graphite mold for the preparation of fused high-purity zirconia bricks to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A graphite mold for the preparation of fused high-purity zirconia bricks, including a support box and a graphite mold located on the top of the support box. A mold cavity for the preparation of fused high-purity zirconia bricks is opened at the top of the graphite mold. A protective frame for protecting against collisions at the opening is provided at the top opening of the mold cavity. The protective frame can avoid collisions with the graphite mold when casting high-temperature zirconia liquid, prevent damage to the graphite mold, and play a protective role. At the same time, it can avoid abrasion of the opening of the mold cavity during demolding and improve the service life. Conductive rods for current guiding are arranged on the middle wall of the graphite mold around the mold cavity. By introducing current into the interior of the conductive rods and then conducting through the graphite mold, the inner cavity of the mold cavity can be heated simultaneously around, improving the uniformity of temperature rise inside the mold cavity;

[0007] Quartz sand particles are arranged in the middle of the support box. Through the quartz sand particles, the bottom of the graphite mold can be supported, improving the support effect of the graphite mold, avoiding damage to the bottom of the graphite mold when the graphite mold moves, and at the same time avoiding the surface temperature of the graphite mold from dissipating through the bottom, improving the use effect. Heat dissipation mechanisms for uniformly dissipating heat from the quartz sand particles are arranged on both sides of the support box. Through the heat dissipation mechanisms, rapid heat dissipation can be achieved when heat dissipation inside the quartz sand particles is required, improving the use effect. An angle adjustment mechanism for adjusting the inclination angle of the graphite mold is arranged between the support box and the graphite mold. Through the angle adjustment mechanism, the inclination of the graphite mold can be controlled during casting and blanking, facilitating casting or blanking use. By controlling the inclination of the graphite mold during casting, collision with the bottom wall of the inner cavity of the mold cavity can be avoided, and it can be directly poured into the inside of the mold cavity along the side of the graphite mold, improving the use effect. Two metal vertical plates are fixedly connected to the top of the protective frame. A temperature monitor and a jet nozzle for spraying inert gas are respectively arranged on one side of the two metal vertical plates. Through the temperature monitor, the temperature inside the mold cavity can be detected when heating the graphite mold, facilitating auxiliary control of the preheating effect, and injecting inert gas into the inside of the mold cavity through the jet nozzle can reduce the oxygen content inside the mold cavity to an extremely low level, thereby inhibiting the oxidation of graphite, ensuring that the mold works in a relatively oxygen-free environment, and avoiding trace carbon elements from diffusing into zirconia, changing the crystal structure or chemical composition of zirconia, and affecting its purity and performance.

[0008] In a preferred embodiment, a ceramic coating for high-temperature resistance and oxidation resistance is provided on the outer surface of the graphite mold. The cross-sectional shape of the protective frame is set as an "L" shape. One end of the protective frame is embedded at the opening position of the mold cavity. Two fastening strips are embedded on the outer surface of the graphite mold. By providing the ceramic coating, the surface oxidation of the graphite mold can be avoided, prolonging the service life of the graphite mold, and the opening of the mold cavity can be protected from collision through the protective frame, avoiding damage to the opening. The strength of the graphite mold can be improved through the fastening strips to avoid damage to the graphite mold.

[0009] In a preferred embodiment, two electrode plates are arranged at one end of the graphite mold. One end of the electrode plate is connected to a conductive rod. An anti-slip groove is arranged at the end of the electrode plate away from the conductive rod. The electrode plate facilitates energizing the conductive rod, thereby heating the graphite mold. By providing the anti-slip groove, it can be avoided from falling off when the electrode plate is clamped and connected, improving the use effect.

[0010] In a preferred embodiment, a limiting plate and a connecting pipe are fixedly connected to a position on one side of the metal vertical plate corresponding to the jet nozzle. One end of the connecting pipe is communicated with a delivery air pump of inert gas through a hose. The inert gas is set as one of argon and nitrogen. The jet nozzle and the temperature monitor are both oriented towards the middle of the mold cavity. The hose connected to the connecting pipe can be supported by the limiting plate to avoid the influence of the high temperature on the surface of the graphite mold on the use effect of the hose, and it is convenient to connect and use through the connecting pipe. Inert gas is input into the mold cavity through the jet nozzle, so that inert gas can be gathered inside the mold cavity. Before casting, the graphite inside the mold cavity can be prevented from oxidizing, and trace carbon elements can be prevented from diffusing into zirconia, changing the crystal structure or chemical composition of zirconia and affecting its purity and performance. The temperature inside the mold cavity can be conveniently monitored in real time through the temperature monitor.

[0011] In a preferred embodiment, the heat dissipation mechanism includes a plurality of heat conducting plates penetrating through the middle of the support box. Fixed frames are symmetrically and fixedly connected to both sides of the support box. A heat dissipation plate fixed on the support box and a plurality of heat dissipation fans fixed in the middle of the fixed frame are arranged in the middle of the fixed frame.

[0012] In a preferred embodiment, both ends of the heat conducting plate are respectively fixedly connected to the corresponding heat dissipation plates. A heat dissipation tooth plate is fixedly connected to one side of the heat dissipation plate. The wind directions of adjacent two heat dissipation fans are opposite. A dust-proof net is arranged at one end of the fixed frame. By starting a plurality of heat dissipation fans, a part of the heat dissipation fans can inject gas towards the middle of the fixed frame, and the high-temperature gas inside the fixed frame can be discharged through another part of the heat dissipation fans, so that the gas can flow on the surfaces of the heat dissipation plate and the heat dissipation tooth plate, thereby cooling the heat dissipation plate and the heat dissipation tooth plate, and further realizing the cooling of the heat conducting plate. The internal temperature of the quartz sand particles can be evenly reduced, improving the use effect. And through the arranged dust-proof net, dust can be prevented from entering the inside of the fixed frame and adhering to the surfaces of the heat dissipation plate and the heat dissipation tooth plate, playing a role in dust prevention.

[0013] In a preferred embodiment, the angle adjustment mechanism includes a first connecting plate rotatably arranged on the top of the support box near one side of the electrode plate. Limiting steel plates are symmetrically arranged on both sides of the graphite mold. Mullite bricks are fixedly connected to the opposite sides of the two limiting steel plates. Electric push rods are symmetrically and rotatably connected to both sides of the top of the support box.

[0014] In a preferred embodiment, limiting blocks are arranged on the opposite sides of the two limiting steel plates away from the first connecting plate. The mullite bricks are in contact with the wall of the graphite mold. Fixed screws are fixedly connected to both sides of the limiting blocks and the first connecting plate. The fixed screws penetrate through the middle of the limiting steel plates and are sleeved with nuts.

[0015] In a preferred embodiment, second connecting plates are symmetrically and fixedly connected to the opposite sides of the two limiting steel plates. A connecting rod is fixedly connected to the middle of the second connecting plate. The output end of the electric push rod extends to the middle of the second connecting plate. The connecting rod penetrates through the output end of the electric push rod and is slidably connected to the output end of the electric push rod. By squeezing the limiting steel plate with the explosion shield bow nut, the two limiting steel plates can drive the mullite bricks to clamp and fix the two bottom sides of the graphite mold. Through the cooperation of the limiting steel plate, the first connecting plate and the limiting block, they can be clamped and fixed on the two sides of the graphite mold. By starting the electric push rod to control the rotation of the limiting steel plate, the limiting block and the first connecting plate, the support box can be controlled to rotate, which is convenient for tilting assistance during blanking or casting, so that the liquid can flow into the inside of the mold cavity along one side wall of the inner cavity of the mold cavity during casting, avoiding collision and improving the use effect.

[0016] The technical effects and advantages of the present invention:

[0017] 1. First, through the cooperation of the electrode plate and the conductive rod provided in the present invention, when heating by electricity, the graphite mold can be evenly heated, so that the temperature diffuses from the middle to the surrounding, avoiding the situation of local overheating and damage caused by uneven heating transfer, improving the preheating effect. And through the provided protective frame, it can avoid collision with the graphite mold when casting high-temperature zirconia liquid, causing damage to the graphite mold, playing a protective role, and at the same time can avoid abrasion to the opening of the mold cavity during demolding, improving the service life and the forming effect;

[0018] 2. The present invention also injects inert gas into the inside of the mold cavity through the air jet nozzle, reducing the oxygen content in the inside of the mold cavity to an extremely low level, thereby inhibiting the oxidation of graphite, ensuring that the mold works in a relatively oxygen-free environment, and can avoid trace carbon elements diffusing into zirconia, changing the crystal structure or chemical composition of zirconia, affecting its purity and performance. And through the fastening strip, the overall strength of the graphite mold can be improved. Through the quartz sand particles, the surface temperature of the graphite mold can be prevented from dissipating through the bottom, resulting in uneven heat dissipation of the graphite mold and affecting the cooling effect;

[0019] 3. The present invention also has an angle adjustment mechanism provided, which can control the inclination of the graphite mold during casting and blanking, facilitating casting or blanking use, avoiding the liquid during casting from colliding with the bottom wall of the inner cavity of the mold cavity, and can directly pour into the inside of the mold cavity along the side of the graphite mold, improving the use effect. And through the provided heat dissipation mechanism, rapid heat dissipation can be carried out when the quartz sand particles need to be dissipated. Through the provided ceramic coating, the surface oxidation of the graphite mold can be avoided, extending the service life of the graphite mold;

[0020] In summary, through the mutual influence of the above multiple functions, when the power is turned on for heating, the graphite mold can be evenly heated, and the temperature can diffuse from the middle to the surrounding, avoiding the situation of local overheating and damage caused by uneven heat transfer during heating, improving the preheating effect, and avoiding abrasion at the opening of the mold cavity during demolding. Brief Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the disassembled structure of the graphite mold and the support box of the present invention.

[0024] Figure 4 It is a schematic diagram of the disassembled structure of the heat dissipation mechanism of the present invention.

[0025] Figure 5 It is a schematic diagram of the structure of the angle adjustment mechanism of the present invention.

[0026] Figure 6 It is a schematic diagram of the disassembled structure of the angle adjustment mechanism of the present invention.

[0027] Reference numerals are: 1, support box; 2, graphite mold; 3, mold cavity; 4, protective frame; 5, conductive rod; 6, electrode plate; 7, quartz sand particles; 8, metal vertical plate; 9, jet nozzle; 10, temperature monitor; 11, limiting plate; 12, heat conducting plate; 13, heat dissipation plate; 14, heat dissipation tooth plate; 15, fixed frame; 16, heat dissipation fan; 17, fastening strip; 18, first connecting plate; 19, limiting steel plate; 20, mullite brick; 21, limiting block; 22, fixing screw; 23, second connecting plate; 24, electric push rod. Detailed Embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] As shown in the attached Figure 1-6A graphite mold for the preparation of cast high-purity zirconia bricks is shown, including a support box 1 and a graphite mold 2 located on top of the support box 1. A mold cavity 3 for casting high-purity zirconia bricks is provided at the top of the graphite mold 2. A protective frame 4 for collision protection at the opening of the mold cavity 3 is arranged at the top opening of the mold cavity 3. Through the protective frame 4, it is possible to avoid collision with the graphite mold 2 when pouring high-temperature zirconia liquid, prevent damage to the graphite mold 2, and play a protective role. At the same time, it is possible to avoid abrasion at the opening of the mold cavity 3 during demolding, and improve the service life. Conductive rods 5 for current conduction are arranged on the middle wall of the graphite mold 2 around the mold cavity 3. By introducing current into the interior of the conductive rods 5 and then realizing conduction through the graphite mold 2, the inner cavity of the mold cavity 3 can be heated simultaneously on all sides, improving the uniformity of temperature rise inside the mold cavity 3;

[0030] Quartz sand particles 7 are arranged in the middle of the support box 1. Through the quartz sand particles 7, the bottom of the graphite mold 2 can be supported, improving the support effect of the graphite mold 2, and preventing damage to the bottom of the graphite mold 2 when the graphite mold 2 moves. At the same time, it can prevent the surface temperature of the graphite mold 2 from dissipating through the bottom, resulting in uneven heat dissipation of the graphite mold 2 and affecting the cooling effect of the finished product. Heat dissipation mechanisms for uniformly dissipating heat from the quartz sand particles 7 are arranged on both sides of the support box 1. Through the heat dissipation mechanisms, rapid heat dissipation can be achieved when heat dissipation inside the quartz sand particles 7 is required, improving the usage effect. An angle adjustment mechanism for adjusting the tilt angle of the graphite mold 2 is arranged between the support box 1 and the graphite mold 2. Through the angle adjustment mechanism, the tilt of the graphite mold 2 can be controlled during casting and blanking, facilitating casting or blanking. By controlling the tilt of the graphite mold 2 during casting, collision with the bottom wall of the inner cavity of the mold cavity 3 can be avoided, and the liquid can be directly poured into the interior of the mold cavity 3 along the side of the graphite mold 2, improving the usage effect. Two metal vertical plates 8 are fixedly connected to the top of the protective frame 4. A temperature monitor 10 and a jet nozzle 9 for ejecting inert gas are respectively arranged on one side of the two metal vertical plates 8. Through the temperature monitor 10, the temperature inside the mold cavity 3 can be detected when heating the graphite mold 2, facilitating auxiliary control of the preheating effect. And inert gas is injected into the interior of the mold cavity 3 through the jet nozzle 9, which can reduce the oxygen content inside the mold cavity 3 to an extremely low level, thereby inhibiting the oxidation of graphite, ensuring that the mold works in a relatively oxygen-free environment, and avoiding the diffusion of trace carbon elements into zirconia, changing the crystal structure or chemical composition of zirconia, and affecting its purity and performance.

[0031] As attached Figure 1-3As shown in the figure, a ceramic coating for high temperature resistance and oxidation resistance is provided on the outer surface of the graphite mold 2. The cross-sectional shape of the protective frame 4 is set to an "L" shape. One end of the protective frame 4 is embedded at the opening position of the mold cavity 3. Two fastening strips 17 are embedded on the outer surface of the graphite mold 2. Two electrode plates 6 are provided at one end of the graphite mold 2. One end of the electrode plate 6 is connected to the conductive rod 5. An anti-slip groove is provided at the end of the electrode plate 6 away from the conductive rod 5. A limiting plate 11 and a connecting pipe are fixedly connected to the position of the metal vertical plate 8 corresponding to the jet nozzle 9 on one side. One end of the connecting pipe is communicated with the delivery air pump of the inert gas through a hose. The inert gas is set to one of argon and nitrogen. The orientations of the jet nozzle 9 and the temperature monitor 10 both aim at the middle of the mold cavity 3. By providing the ceramic coating, the surface oxidation of the graphite mold 2 can be avoided, the service life of the graphite mold 2 can be extended, and the opening of the mold cavity 3 can be protected from collision by the protective frame 4 to avoid damage to the opening. The strength of the graphite mold 2 can be improved by the fastening strip 17 to avoid damage to the graphite mold 2. The conductive rod 5 can be conveniently energized through the electrode plate 6, so as to heat the graphite mold 2. By providing the anti-slip groove, it can be avoided that the electrode plate 6 falls off when being clamped and connected, improving the use effect. The hose connected to the connecting pipe can be supported by the limiting plate 11 to avoid the influence of the high temperature on the surface of the graphite mold 2 on the use effect of the hose, and it is convenient to connect and use through the connecting pipe. By inputting inert gas into the mold cavity 3 through the jet nozzle 9, the inert gas can be accumulated inside the mold cavity 3, and the graphite inside the mold cavity 3 can be prevented from oxidizing before casting, avoiding the diffusion of trace carbon elements into zirconia, changing the crystal structure or chemical composition of zirconia, and affecting its purity and performance. The temperature inside the mold cavity 3 can be conveniently monitored in real time through the temperature monitor 10.

[0032] As shown in the attached Figure 1-4 figure, the heat dissipation mechanism includes a plurality of heat conduction plates 12 penetrating through the middle of the support box 1. Fixed frames 15 are symmetrically and fixedly connected to both sides of the support box 1. A heat dissipation plate 13 fixed to the support box 1 and a plurality of heat dissipation fans 16 fixed to the middle of the fixed frame 15 are provided in the middle of the fixed frame 15. Both ends of the heat conduction plate 12 are fixedly connected to the corresponding heat dissipation plates 13. A heat dissipation tooth plate 14 is fixedly connected to one side of the heat dissipation plate 13. The wind directions of two adjacent heat dissipation fans 16 are opposite. A dust-proof net is provided at one end of the fixed frame 15. By starting a plurality of heat dissipation fans 16, a part of the heat dissipation fans can inject gas into the middle of the fixed frame 15, and the high-temperature gas inside the fixed frame 15 can be discharged by the other part of the heat dissipation fans 16, so that the gas can flow on the surfaces of the heat dissipation plate 13 and the heat dissipation tooth plate 14, thereby cooling the heat dissipation plate 13 and the heat dissipation tooth plate 14, and further realizing the cooling of the heat conduction plate 12, enabling the internal uniform cooling of the quartz sand particles 7, improving the use effect, and by providing the dust-proof net, it can be avoided that dust enters the inside of the fixed frame 15 and adheres to the surfaces of the heat dissipation plate 13 and the heat dissipation tooth plate 14, playing a role in dust prevention.

[0033] As shown in the attached Figure 1 、 3 、5, and 6, the angle adjustment mechanism includes a first connecting plate 18 rotatably disposed on the top of the support box 1 near one side of the electrode plate 6. Limiting steel plates 19 are symmetrically arranged on both sides of the graphite mold 2. Mullite bricks 20 are fixedly connected to the opposite sides of the two limiting steel plates 19. Electric push rods 24 are symmetrically and rotatably connected to both sides of the top of the support box 1. Limiting blocks 21 are arranged on the opposite sides of the two limiting steel plates 19 away from the first connecting plate 18. The mullite bricks 20 are in contact with the wall of the graphite mold 2. Fixed screws 22 are fixedly connected to both sides of the limiting block 21 and the first connecting plate 18. The fixed screws 22 penetrate through the middle of the limiting steel plate 19 and are sleeved with nuts. Second connecting plates 23 are symmetrically and fixedly connected to the opposite sides of the two limiting steel plates 19. A connecting rod is fixedly connected to the middle of the second connecting plate 23. The output end of the electric push rod 24 extends to the middle of the second connecting plate 23. The connecting rod penetrates through the output end of the electric push rod 24 and is slidably connected to the output end of the electric push rod 24. By squeezing the limiting steel plate 19 with the shield bow nut, the mullite bricks 20 can be driven by the two limiting steel plates 19 to clamp and fix the bottom sides of the graphite mold 2. Through the cooperation of the limiting steel plate 19, the first connecting plate 18, and the limiting block 21, the two sides of the graphite mold 2 can be clamped and fixed. By starting the electric push rod 24 to control the rotation of the limiting steel plate 19, the limiting block 21, and the first connecting plate 18, the rotation of the support box 1 can be controlled, which is convenient for tilting assistance during blanking or casting, so that the liquid flows along one side wall of the inner cavity of the mold cavity 3 into the inside of the mold cavity 3 during casting, avoiding collisions and improving the use effect.

[0034] Working principle of the present invention: When in use, when casting is not required, inert gas is injected into the inside of the mold cavity 3 through the air jet nozzle 9, so that the oxygen content inside the mold cavity 3 is reduced to an extremely low level, thereby inhibiting the oxidation of graphite, ensuring that the mold works in a relatively oxygen-free environment, and avoiding the diffusion of trace carbon elements into zirconia, changing the crystal structure or chemical composition of zirconia, and affecting its purity and performance;

[0035] Before casting is required, the conductive chuck needs to be clamped on the two electrode plates 6 to heat the graphite mold 2. At the same time, the internal temperature of the mold cavity 3 is detected by the temperature monitor 10 until the required temperature is reached inside the mold cavity 3;

[0036] Then start the electric push rod 24 to control the angle adjustment mechanism to drive the graphite mold 2 to tilt until the required tilt angle is reached, pour the high-temperature liquid along one side wall of the inner cavity of the mold cavity 3 into the inside of the mold cavity 3, and at the same time start the electric push rod 24 to control the graphite mold 2 to reset in sequence until the high-temperature liquid is located inside the mold cavity 3;

[0037] After casting, the quartz sand particles 7 can prevent the rapid heat dissipation at the bottom of the graphite mold 2, making the cooling rate of the four sides of the graphite mold 2 the same, improving the quality of the finished product and avoiding cracking.

[0038] When blanking is required, start the electric push rod 24 to control the rotation angle of the graphite mold 2 to be greater than 100 degrees in sequence, and the finished product in the middle of the mold cavity 3 can be poured out, which is convenient for blanking.

[0039] During blanking and casting, the protective frame 4 protects the opening of the mold cavity 3 from collision to improve the overall strength, and the strength of the graphite mold 2 is further improved by the set fastening strip 17. The surface oxidation of the graphite mold 2 is avoided through the set ceramic coating, and the service life of the graphite mold 2 is extended.

[0040] When rapid heat dissipation of the quartz sand particles 7 is required, multiple cooling fans 16 can be started to achieve the effect of rapidly cooling the quartz sand particles 7 in sequence, improving the use effect.

[0041] In the attached drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0042] Finally, the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A graphite mold for preparing high-purity zirconia bricks by melting and casting, comprising a support box (1) and a graphite mold (2) located on the top of the support box (1), characterized in that: The top of the graphite mold (2) is provided with a mold cavity (3) for melting and casting high-purity zirconia bricks, the top opening of the mold cavity (3) is provided with a protective frame (4) for collision protection at the opening, and the middle wall of the graphite mold (2) is located around the mold cavity (3) and is provided with conductive rods (5) for current guidance; Quartz sand particles (7) are arranged in the middle of the support box (1), and heat dissipation mechanisms for uniformly dissipating heat from the quartz sand particles (7) are arranged on both sides of the support box (1). An angle adjustment mechanism for adjusting the inclination angle of the graphite mold (2) is arranged between the support box (1) and the graphite mold (2), and two metal vertical plates (8) are fixedly connected to the top of the protection frame (4), and a temperature monitor (10) and a jet nozzle (9) for spraying inert gas are respectively arranged on one side of the two metal vertical plates (8).

2. A graphite mold for preparing high-purity zirconia bricks according to claim 1, characterized in that: The outer surface of the graphite mold (2) is provided with a ceramic coating for high temperature resistance and oxidation resistance, the cross-sectional shape of the protective frame (4) is set to be "L"-shaped, one end of the protective frame (4) is embedded in the opening of the mold cavity (3), and two fastening strips (17) are embedded in the outer surface of the graphite mold (2).

3. A graphite mold for preparing high-purity zirconia bricks according to claim 1, characterized in that: Two electrode plates (6) are provided at one end of the graphite mold (2), one end of the electrode plate (6) is connected to the conductive rod (5), and an anti-slip groove is provided at one end of the electrode plate (6) away from the conductive rod (5).

4. A graphite mold for preparing high-purity zirconia bricks according to claim 1, characterized in that: A limiting plate (11) and a connecting pipe are fixedly connected to a position corresponding to the air jet nozzle (9) on one side of the metal vertical plate (8); one end of the connecting pipe is connected to an inert gas delivery pump via a hose; the inert gas is set to be one of argon and nitrogen; and the air jet nozzle (9) and the temperature monitor (10) are both directed toward the middle of the mold cavity (3).

5. A graphite mold for preparing high-purity zirconia bricks according to claim 1, characterized in that: The heat dissipation mechanism comprises a plurality of heat conduction plates (12) penetrating the middle of a support box (1); a fixed frame (15) is symmetrically fixedly connected to both sides of the support box (1); a heat dissipation plate (13) fixed to the support box (1) and a plurality of heat dissipation fans (16) fixed to the middle of the fixed frame (15) are arranged in the middle.

6. A graphite mold for preparing high-purity zirconia bricks according to claim 5, characterized in that: The two ends of the heat conducting plate (12) are respectively fixedly connected to the corresponding heat dissipation plates (13); one side of the heat dissipation plate (13) is fixedly connected to a heat dissipation tooth plate (14); the wind directions of two adjacent heat dissipation fans (16) are opposite; and a dustproof net is provided at one end of the fixed frame (15).

7. A graphite mold for preparing high-purity zirconia bricks according to claim 1, characterized in that: The angle adjustment mechanism comprises a first connecting plate (18) which is rotatable on the top of the support box (1) near the electrode plate (6), limiting steel plates (19) are symmetrically arranged on both sides of the graphite mold (2), mullite bricks (20) are fixedly connected to opposite sides of the two limiting steel plates (19), and electric push rods (24) are symmetrically rotatably connected to both sides of the top of the support box (1).

8. A graphite mold for preparing high-purity zirconia bricks according to claim 7, characterized in that: A limiting block (21) is provided on one side of the two limiting steel plates (19) opposite to the first connecting plate (18); the mullite brick (20) is in contact with the wall of the graphite mold (2); both sides of the limiting block (21) and the first connecting plate (18) are fixedly connected with a fixing screw (22); the fixing screw (22) passes through the middle of the limiting steel plate (19) and is sleeved with a nut.

9. A graphite mold for preparing high-purity zirconia bricks according to claim 7, characterized in that: A second connecting plate (23) is symmetrically fixedly connected to the opposite sides of the two limiting steel plates (19), a connecting rod is fixedly connected to the middle of the second connecting plate (23), the output end of the electric push rod (24) extends to the middle of the second connecting plate (23), the connecting rod passes through the output end of the electric push rod (24) and is slidably connected to the output end of the electric push rod (24).

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