Low-temperature sintering device for aluminum oxide ceramic production

Abstract

The invention relates to the technical field of ceramic product production equipment, and discloses a low-temperature sintering device for alumina ceramic production, which comprises a sintering furnace, the upper side of the sintering furnace is fixedly provided with a cooling box for temperature conversion treatment, the upper side of the cooling box is provided with a de-waxing furnace for de-waxing treatment, and the front sides of the sintering furnace and the de-waxing furnace are provided with furnace doors. Main combustors for combustion treatment are fixedly mounted in the two sides of the sintering furnace correspondingly, auxiliary combustors for combustion treatment are fixedly mounted in the two sides of the dewaxing furnace correspondingly, and two sets of ceramic containing plates are arranged on the inner side of the sintering furnace and the inner side of the cooling box correspondingly. And temperature sensors for temperature monitoring are fixedly mounted on the inner walls of the rear sides of the sintering furnace and the cooling box. According to the low-temperature sintering device for aluminum oxide ceramic production, through overall cooperative use, the two sets of auxiliary combustors are controlled to properly heat the low-temperature sintering device to the needed temperature in a balanced mode, and energy consumption is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic product production equipment, and in particular to a low-temperature sintering device for producing alumina ceramics. Background Art

[0002] Alumina ceramics are widely used in electronics, electrical, machinery, textile, aerospace and other fields due to their good electrical conductivity, mechanical strength and high temperature resistance. The application of low-temperature sintering equipment can significantly reduce energy consumption, shorten the sintering cycle, reduce the loss of kilns and kiln tools, and thus reduce production costs. Waxing during sintering is a key step in ceramic production. The main purpose is to remove the wax in the ceramic body to ensure the smooth sintering process and the quality of the finished ceramic product. However, due to the different temperatures required for waxing and sintering, they are often processed by two types of equipment. When switching between the two sets of equipment, more heat is lost internally and cannot be better utilized. In addition, harmful gases are generated during sintering, which can easily pollute the environment. Summary of the invention

[0003] The main purpose of the present invention is to provide a low-temperature sintering device for the production of alumina ceramics, which can effectively solve the problems in the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is:

[0005] A low-temperature sintering device for the production of alumina ceramics comprises a sintering furnace, a cooling box for temperature conversion treatment is fixedly arranged on the upper side of the sintering furnace, a wax removal furnace for wax removal treatment is arranged on the upper side of the cooling box, furnace doors are installed on the front sides of the sintering furnace and the wax removal furnace, main burners for combustion treatment are fixedly installed on both sides of the sintering furnace, auxiliary burners for combustion treatment are fixedly installed on both sides of the wax removal furnace, two groups of ceramic placement plates are arranged on the inner sides of the sintering furnace and the cooling box, and the inner walls of the rear sides of the sintering furnace and the cooling box are A temperature sensor for temperature monitoring is fixedly installed, a plurality of groups of heat-conducting spiral cooling tubes are fixedly arranged inside the wax drain furnace, a water storage shell is fixedly arranged near the center position of the inner side of the wax drain furnace, a water inlet is opened at the front end of one side of the water storage shell, a water guide pipe is fixedly arranged at the rear end of one side of the water storage shell, a rotating shaft is rotatably arranged at the center position of the water storage shell, a drainage wheel of a power transmission structure is fixedly arranged on the outer side of the rotating shaft near the inside of the water storage shell, and spiral fan blades for circulating heat flow are fixedly arranged on the upper and lower sides of the rotating shaft.

[0006] Preferably, two groups of fixing rings are fixedly installed on the inner walls on both sides of the cooling box, water level sensors are fixedly installed on the inner sides of the two groups of fixing rings, a supplementary water pipe is fixedly installed on the rear end of one side of the cooling box, a pump body mounting frame is fixedly installed on the rear end of the cooling box, a water pump is fixedly installed on the inner side of the pump body mounting frame, a connecting pipe is fixedly installed between the water pump and the water pipe, a conduction pipe is fixedly installed on the upper water outlet end of the water pump, a branch pipe is fixedly installed on the upper side of the conduction pipe, an atomizer is fixedly installed on one end of the branch pipe, and a drain pipe is fixedly installed at the rear end of the cooling box near the branch pipe.

[0007] Preferably, an exhaust hood is fixedly provided on the upper end of the wax exhaust furnace, an exhaust pipe is fixedly provided on the upper end of the exhaust hood, one side of the exhaust pipe is provided as a U-shaped tube, a water trough is provided at the lower bend of the U-shaped tube, and a filter plate is fixedly provided inside the U-shaped tube close to one side of the exhaust pipe.

[0008] Preferably, the sintering furnace and the wax removal furnace are connected through a spiral cooling pipe, cooling water is provided on the inner side of the cooling box, the furnace door is opened by rotation, the main burner and the auxiliary burner are electrically connected, the ceramic placement plate is in a grid shape, and several groups of the spiral cooling pipes are evenly arranged in a ring on the inner side of the cooling box.

[0009] Preferably, the water storage shell is connected with the water inlet and the inside of the water pipe, the rotating shaft passes through the inner side of the water storage shell and the cooling box, and the two groups of spiral fan blades are respectively arranged inside the sintering furnace and the cooling box.

[0010] Preferably, the supplementary water pipe is connected to an external liquid adding pump and a cooling water tank, the connecting pipe passes through the rear side of the cooling tank and is connected to the water guide pipe, and the connecting pipe is connected to the water inlet end of the water pump.

[0011] Preferably, the atomizer is fixedly connected to one side of the U-shaped tube for spraying, and the drain pipe is fixedly connected to the lower end of the sink for drainage.

[0012] Preferably, the exhaust hood is connected to the interior of the wax exhaust furnace through a pipeline, the exhaust hood, the exhaust pipe and the interior of the U-shaped tube are connected, and the U-shaped tube is fixedly connected to the atomizer and the drain pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Place the alumina ceramics that need to be dewaxed or sintered on the upper ends of the two groups of ceramic placement plates set in the sintering furnace and the dewax furnace respectively, and close the two groups of furnace doors respectively. The alumina ceramics inside the sintering furnace can be sintered through the two groups of main burners. The sintering temperature of alumina ceramics is generally between 1500°C and 1700°C. The highest temperature in the dewax process is gradually heated to 1150°C. Therefore, the heat inside the sintering furnace is discharged into the dewax furnace through several groups of spiral cooling tubes. In the middle, the cooling water inside the cooling box is used for cooling treatment, so that the heat flowing out of the sintering furnace becomes a relatively low temperature state and then enters the dewax furnace. The alumina ceramics inside the dewax furnace are processed, and the internal temperature sensor is used to detect whether the required temperature is reached, and then the two groups of auxiliary burners are controlled to properly heat it to the required temperature, which greatly reduces energy consumption.

[0015] 2. The gas is discharged to the inside of the U-shaped tube through the exhaust hood and exhaust pipe for spraying and filtering by the filter plate. After obtaining relatively clean gas, it is discharged outward from the U-shaped tube.

[0016] 3. Through the use of a water pump, the connecting pipe and the water pipe are used to extract the cooling water inside the cooling box, and then the cooling water is discharged to the inside of one side of the U-shaped tube through the conduction pipe, the branch pipe and the atomizer to form a mist to spray and purify the internal gas. The cooling water inside the cooling box is affected by the temperature of the spiral cooling tube, and the high-temperature cooling water spray can absorb heat more effectively. Because its initial temperature is high, it can reduce the gas temperature faster when exchanging with the gas. The cooling effect of this method is more significant and is suitable for processing high-temperature gas. Compared with the normal temperature cooling water spray, the initial temperature is lower, and it takes more time to achieve the same cooling effect when exchanging with the high-temperature gas. Therefore, the effect of high-temperature cooling water spraying on the gas is more significant. Finally, the filtered spray cooling water is introduced into the drain pipe for recycling. The cooling water plays a certain cooling role in the in-and-out circulation work, changing the cooling water temperature inside the cooling box so that it is not easy to be saturated.

[0017] 4. When the cooling water is extracted from the connecting pipe, the cooling water first enters the water storage shell through the water inlet, and then is discharged from the water guide pipe. In the process, the flowing cooling water will push the drain wheel to rotate rapidly, and the rotating shaft will drive the two sets of spiral blades to rotate together, respectively driving the heat inside the sintering furnace and the wax discharge furnace to flow, effectively realizing the hot air circulation in the furnace, allowing the hot air flow to stay in the furnace for more time, and ensuring that the middle part and both sides of the alumina ceramics are heated evenly during sintering, thereby avoiding the occurrence of inconsistent color of the sintered ceramics. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a low-temperature sintering device for producing alumina ceramics according to the present invention;

[0019] Figure 2 This is a schematic diagram of the rear side structure of a low-temperature sintering device for producing alumina ceramics according to the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of a sintering chamber and a wax removal chamber of a low-temperature sintering device for producing alumina ceramics according to the present invention;

[0021] Figure 4 It is a schematic diagram of the side cutaway structure of a cooling chamber of a low-temperature sintering device for producing alumina ceramics according to the present invention;

[0022] Figure 5 A low temperature sintering device for producing alumina ceramics according to the present invention Figure 4 A schematic diagram of the enlarged structure of the middle part A;

[0023] Figure 6 This is a schematic diagram of the structure of the cooling water flow components of a low-temperature sintering device for producing alumina ceramics according to the present invention;

[0024] Figure 7 This is a schematic diagram of the internal structure of a water storage shell of a low-temperature sintering device for producing alumina ceramics according to the present invention.

[0025] In the figure: 1. sintering furnace; 2. cooling box; 3. wax drain furnace; 4. furnace door; 5. main burner; 6. auxiliary burner; 7. ceramic placement plate; 8. temperature sensor; 9. spiral cooling tube; 10. water storage shell; 11. water inlet; 12. water guide pipe; 13. rotating shaft; 14. drainage wheel; 15. spiral fan blade; 16. fixing ring; 17. water level sensor; 18. water supply pipe; 19. pump body mounting frame; 20. water pump; 21. connecting pipe; 22. conduction pipe; 23. branch pipe; 24. atomizer; 25. drain pipe; 26. exhaust hood; 27. exhaust pipe; 28. U-shaped pipe; 29. ​​sink; 30. filter plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are relative relationships of directions or positions, and are 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] See also Figure 1-Figure 7 , an embodiment of the present invention: a low-temperature sintering device for the production of alumina ceramics, comprising a sintering furnace 1, a cooling box 2 for temperature conversion treatment is fixedly arranged on the upper side of the sintering furnace 1, a wax removal furnace 3 for wax removal treatment is arranged on the upper side of the cooling box 2, a furnace door 4 is installed on the front side of the sintering furnace 1 and the wax removal furnace 3, main burners 5 for combustion treatment are fixedly installed on both sides of the sintering furnace 1, auxiliary burners 6 for combustion treatment are fixedly installed on both sides of the wax removal furnace 3, two groups of ceramic placement plates 7 are arranged on the inner sides of the sintering furnace 1 and the cooling box 2, and the inner walls of the rear sides of the sintering furnace 1 and the cooling box 2 are provided with a plurality of ceramic placing plates 7. A temperature sensor 8 for temperature monitoring is fixedly installed, a plurality of groups of heat-conducting spiral cooling pipes 9 are fixedly arranged inside the wax discharge furnace 3, a water storage shell 10 is fixedly arranged near the center position on the inner side of the wax discharge furnace 3, a water inlet 11 is opened at the front end of one side of the water storage shell 10, a water guide pipe 12 is fixedly arranged at the rear end of one side of the water storage shell 10, a rotating shaft 13 is rotatably arranged at the center position of the water storage shell 10, a drainage wheel 14 of a power transmission structure is fixedly arranged on the outer side of the rotating shaft 13 near the inside of the water storage shell 10, and spiral fan blades 15 for circulating heat flow are fixedly arranged on the upper and lower sides of the rotating shaft 13.

[0029] The sintering furnace 1 and the wax removal furnace 3 are connected through a spiral cooling pipe 9. Cooling water is provided on the inner side of the cooling box 2. The furnace door 4 is opened by rotation. The main burner 5 and the auxiliary burner 6 are electrically connected. The ceramic placement plate 7 is in a grid shape. Several groups of spiral cooling pipes 9 are evenly arranged in a ring shape on the inner side of the cooling box 2. The water storage shell 10 is connected with the water inlet 11 and the water guide pipe 12. The rotating shaft 13 passes through the water storage shell 10 and the inner side of the cooling box 2. Two groups of spiral fan blades 15 are respectively arranged inside the sintering furnace 1 and the cooling box 2.

[0030] The alumina ceramics that need to be dewaxed or sintered are placed on the upper ends of the two groups of ceramic placement plates 7 set in the sintering furnace 1 and the dewax furnace 3, and the furnace doors 4 of the two groups are closed respectively. The alumina ceramics inside the sintering furnace 1 can be sintered through the two groups of main burners 5. The sintering temperature of alumina ceramics is generally between 1500℃ and 1700℃. The highest temperature in the dewax process is gradually heated to 1150℃. Therefore, the heat inside the sintering furnace 1 is discharged into the dewax furnace 3 through several groups of spiral cooling tubes 9. In the middle, the cooling water inside the cooling box 2 is used for cooling treatment, so that the heat flowing out of the sintering furnace 1 becomes a relatively low temperature state and then enters the dewax furnace 3. The alumina ceramics inside the dewax furnace 3 are processed and the temperature set inside The sensor 8 detects whether the required temperature is reached, and then controls the two groups of auxiliary burners 6 to appropriately heat it to the required temperature, which greatly reduces energy consumption. In addition, when the connecting pipe 21 draws cooling water, the cooling water first enters the interior of the water storage shell 10 through the water inlet 11, and then is discharged by the water guide pipe 12. The flowing cooling water in the process will push the drainage wheel 14 to rotate rapidly, and the rotating shaft 13 will drive the two groups of spiral fan blades 15 to rotate together, respectively driving the heat inside the sintering furnace 1 and the wax removal furnace 3 to flow, effectively realizing the hot air circulation in the furnace, allowing the hot air flow to have more residence time in the furnace, and ensuring that the middle part and both sides of the alumina ceramic are heated evenly during sintering, thereby avoiding the occurrence of inconsistent color of the sintered ceramics.

[0031] Two groups of fixed collars 16 are fixedly installed on the inner walls of both sides of the cooling box 2, and water level sensors 17 are fixedly installed on the inner sides of the two groups of fixed collars 16. A supplementary water pipe 18 is fixedly installed on the rear end of one side of the cooling box 2, a pump body mounting frame 19 is fixedly installed on the rear end of the cooling box 2, a water pump 20 is fixedly installed on the inner side of the pump body mounting frame 19, a connecting pipe 21 is fixedly arranged between the water pump 20 and the water guide pipe 12, a conduction pipe 22 is fixedly installed on the water outlet end on the upper side of the water pump 20, a branch pipe 23 is fixedly arranged on the upper side of the conduction pipe 22, an atomizer 24 is fixedly arranged on one end of the branch pipe 23, and a drain pipe 25 is fixedly arranged at a position near the branch pipe 23 at the rear end of the cooling box 2.

[0032] The supplementary water pipe 18 is connected to the external liquid adding pump and the cooling water tank, the connecting pipe 21 passes through the rear side of the cooling box 2 and is connected to the water pipe 12, the connecting pipe 21 is connected to the water inlet end of the water pump 20, the atomizer 24 is fixedly connected to one side of the U-shaped tube 28 for spraying, and the drain pipe 25 is fixedly connected to the lower end of the water tank 29 for drainage.

[0033] During the operation, the cooling water inside the cooling box 2 is extracted through the use of the water pump 20, the connecting pipe 21 and the water pipe 12, and then discharged to the inside of one side of the U-shaped tube 28 through the conduction pipe 22, the branch pipe 23, and the atomizer 24, forming a mist to spray and purify the internal gas, so that the cooling water inside the cooling box 2 is affected by the temperature of the spiral cooling tube 9, and the high-temperature cooling water spray can absorb heat more effectively. Because its initial temperature is higher, it can reduce the gas temperature more quickly when exchanging with the gas. The cooling effect of this method is more significant and is suitable for processing high-temperature gas. Compared with the normal temperature cooling water spray, the initial temperature is lower, and it takes more time to achieve the same cooling effect when exchanging with the high-temperature gas. Therefore, the effect of high-temperature cooling water spraying gas treatment is more significant. Finally, the filtered spray cooling water is introduced into the drain pipe 25 for recycling. The cooling water plays a certain cooling role in the in-and-out circulation work, changing the cooling water temperature inside the cooling box 2 so that it is not easy to be saturated.

[0034] An exhaust hood 26 is fixedly provided at the upper end of the wax exhaust furnace 3, an exhaust pipe 27 is fixedly provided at the upper end of the exhaust hood 26, a U-shaped tube 28 is provided on one side of the exhaust pipe 27, a water tank 29 is provided at the lower bending part of the U-shaped tube 28, and a filter plate 30 is fixedly provided inside the U-shaped tube 28 near the exhaust pipe 27.

[0035] The exhaust hood 26 is communicated with the interior of the wax exhaust furnace 3 through a pipeline. The exhaust hood 26 , the exhaust pipe 27 , and the interior of the U-shaped pipe 28 are communicated with each other. The U-shaped pipe 28 is fixedly connected with the atomizer 24 and the drain pipe 25 .

[0036] The gas is discharged to the inside of the U-shaped tube 28 through the exhaust hood 26 and the exhaust pipe 27 for spraying and filtering by the filter plate 30 to obtain relatively clean gas, and then discharged to the outside through the U-shaped tube 28.

[0037] Working principle: When in use, the alumina ceramics that need to be dewaxed or sintered are placed on the upper ends of the two groups of ceramic placement plates 7 set in the sintering furnace 1 and the dewax furnace 3, and the two groups of furnace doors 4 are closed respectively. The alumina ceramics inside the sintering furnace 1 can be sintered through the two groups of main burners 5. The sintering temperature of alumina ceramics is generally between 1500℃ and 1700℃. The highest temperature during the dewax process is gradually heated to 1150℃. Therefore, through several groups of spiral cooling tubes 9, the heat inside the sintering furnace 1 is discharged into the dewax furnace 3. In the middle, the cooling water inside the cooling box 2 is used for cooling treatment, so that the heat flowing out of the sintering furnace 1 becomes a relatively low temperature state before entering the dewax furnace 3. The alumina ceramics inside the wax removal furnace 3 are processed, and the temperature sensor 8 set inside detects whether the required temperature is reached, and then controls the two groups of auxiliary burners 6 to properly heat it to the required temperature, which greatly reduces the energy consumption; and then it is discharged to the inside of the U-shaped tube 28 through the exhaust hood 26 and the exhaust pipe 27 for spraying and filtering by the filter plate 30, and after obtaining relatively clean gas, it is discharged outward from the U-shaped tube 28; and during the working process, through the use of the water pump 20, the connecting pipe 21 and the water pipe 12 extract the cooling water inside the cooling box 2, and then discharge it to one side of the U-shaped tube 28 through the conduction pipe 22, the branch pipe 23, and the atomizer 24. Inside, a mist is formed to spray and purify the internal gas, so that the cooling water inside the cooling box 2 is affected by the temperature of the spiral cooling tube 9, and the high-temperature cooling water spray can absorb heat more effectively. Because its initial temperature is high, it can reduce the gas temperature more quickly when exchanging with the gas. The cooling effect of this method is more significant and is suitable for treating high-temperature gas. Compared with the initial temperature of normal-temperature cooling water spray, it is lower, and it takes more time to achieve the same cooling effect when exchanging with high-temperature gas. Therefore, the effect of high-temperature cooling water spraying on gas is more significant. Finally, the filtered spray cooling water is introduced into the drain pipe 25 for recycling, and the cooling water plays a role in the in-and-out circulation work. When the temperature drops to a certain level, the cooling water temperature inside the cooling box 2 is changed so that it is not easy to be saturated; in addition, when the connecting pipe 21 draws cooling water, the cooling water first enters the water storage shell 10 through the water inlet 11, and then is discharged by the water guide pipe 12. In the process, the flowing cooling water will push the drainage wheel 14 to rotate rapidly, and the rotating shaft 13 will drive the two sets of spiral fan blades 15 to rotate together, thereby driving the heat inside the sintering furnace 1 and the wax removal furnace 3 to flow, effectively realizing the hot air circulation in the furnace, allowing the hot air flow to have more residence time in the furnace, and ensuring that the middle part and both sides of the alumina ceramic are heated evenly during sintering, thereby avoiding the occurrence of inconsistent color of the sintered ceramics.

[0038] The main burner 5, auxiliary burner 6, temperature sensor 8, water level sensor 17, water pump 20, atomizer 24 in the present invention are electrically connected to the control end of the equipment, and the use and control methods of the components are common knowledge in this field. Their working principles are already well-known technologies, and the models are selected according to actual use, so they will not be explained in detail.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low temperature sintering device for producing alumina ceramics, comprising a sintering furnace (1), characterized in that: A cooling box (2) for temperature conversion treatment is fixedly arranged on the upper side of the sintering furnace (1), a wax removal furnace (3) for wax removal treatment is arranged on the upper side of the cooling box (2), furnace doors (4) are installed on the front sides of the sintering furnace (1) and the wax removal furnace (3), main burners (5) for combustion treatment are fixedly installed inside both sides of the sintering furnace (1), auxiliary burners (6) for combustion treatment are fixedly installed inside both sides of the wax removal furnace (3), two groups of ceramic placement plates (7) are arranged on the inner sides of the sintering furnace (1) and the cooling box (2), and temperature sensors (8) for temperature monitoring are fixedly installed on the inner walls of the rear sides of the sintering furnace (1) and the cooling box (2). ), a plurality of groups of heat-conducting spiral cooling pipes (9) are fixedly arranged inside the wax discharge furnace (3), a water storage shell (10) is fixedly arranged near the center position inside the wax discharge furnace (3), a water inlet (11) is opened at the front end of one side of the water storage shell (10), a water guide pipe (12) is fixedly arranged at the rear end of one side of the water storage shell (10), a rotating shaft (13) is rotatably arranged at the center position of the water storage shell (10), a drainage wheel (14) of a power transmission structure is fixedly arranged outside the rotating shaft (13) near the inside of the water storage shell (10), and spiral blades (15) that enable heat flow circulation are fixedly arranged on the upper and lower sides of the rotating shaft (13).

2. A low temperature sintering device for producing alumina ceramics according to claim 1, characterized in that: Two groups of fixing rings (16) are fixedly mounted on the inner walls of both sides of the cooling box (2), and water level sensors (17) are fixedly mounted on the inner sides of the two groups of fixing rings (16). A supplementary water pipe (18) is fixedly mounted on the rear end of one side of the cooling box (2). A pump body mounting frame (19) is fixedly mounted on the rear end of the cooling box (2), and a water pump (20) is fixedly mounted on the inner side of the pump body mounting frame (19). A connecting pipe (21) is fixedly mounted between the water pump (20) and the water guide pipe (12). A conduction pipe (22) is fixedly mounted on the upper water outlet end of the water pump (20), and a branch pipe (23) is fixedly mounted on the upper side of the conduction pipe (22). An atomizer (24) is fixedly mounted on one end of the branch pipe (23), and a drainage pipe (25) is fixedly mounted at a position close to the branch pipe (23) at the rear end of the cooling box (2).

3. The low temperature sintering device for producing alumina ceramics according to claim 1, characterized in that: An exhaust hood (26) is fixedly provided at the upper end of the wax exhaust furnace (3), an exhaust pipe (27) is fixedly provided at the upper end of the exhaust hood (26), a U-shaped tube (28) is provided on one side of the exhaust pipe (27), a water tank (29) is provided at the lower bending part of the U-shaped tube (28), and a filter plate (30) is fixedly provided inside the U-shaped tube (28) on one side close to the exhaust pipe (27).

4. The low temperature sintering device for producing alumina ceramics according to claim 1, characterized in that: The sintering furnace (1) and the wax removal furnace (3) are connected via a spiral cooling pipe (9); cooling water is provided on the inner side of the cooling box (2); the furnace door (4) is opened by rotation; the main burner (5) and the auxiliary burner (6) are electrically connected; the ceramic placement plate (7) is in the shape of a grid; and a plurality of groups of the spiral cooling pipes (9) are evenly arranged in a ring shape on the inner side of the cooling box (2).

5. The low temperature sintering device for producing alumina ceramics according to claim 1, characterized in that: The water storage shell (10) is in communication with the water inlet (11) and the interior of the water conduit (12); the rotating shaft (13) passes through the inner sides of the water storage shell (10) and the cooling box (2); and the two groups of spiral blades (15) are respectively arranged inside the sintering furnace (1) and the cooling box (2).

6. A low temperature sintering device for producing alumina ceramics according to claim 2, characterized in that: The replenishing water pipe (18) is connected to an external liquid adding pump and a cooling water tank, the connecting pipe (21) passes through the rear side of the cooling box (2) and is connected to the water guide pipe (12), and the connecting pipe (21) is connected to the water inlet end of the water pump (20).

7. A low temperature sintering device for producing alumina ceramics according to claim 2, characterized in that: The atomizer (24) is fixedly connected to one side of the U-shaped tube (28) for spraying operation, and the drain pipe (25) is fixedly connected to the lower end of the water tank (29) for drainage operation.

8. The low temperature sintering device for producing alumina ceramics according to claim 3, characterized in that: The exhaust hood (26) is connected to the interior of the wax exhaust furnace (3) through a pipeline. The exhaust hood (26), the exhaust pipe (27) and the U-shaped pipe (28) are connected to each other. The U-shaped pipe (28) is fixedly connected to the atomizer (24) and the drain pipe (25).

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