Sintering furnace for zirconia production

Abstract

The utility model relates to the technical field of sintering devices, and discloses a sintering furnace for zirconia production, which comprises a sintering furnace body. The sintering furnace body comprises a horizontal furnace body and a furnace cover arranged on the right side of the furnace body. Heating rods are distributed in the furnace body in a surrounding manner; the device further comprises a containing groove, a supporting table and a supporting assembly. The supporting table comprises a rectangular supporting plate and supporting legs arranged below the supporting plate. The placing groove is in a semi-cylinder shape with an open upper end surface and is fixedly arranged on the left side of the furnace cover; the supporting assembly comprises roller supporting assemblies, connecting plates and lifting assemblies which are symmetrically arranged front and back. The capacity of the containing groove is larger, more materials can be conveniently calcined at a time, the stirring assembly is arranged, the materials in the containing groove can be turned and stirred in the calcining process, and the materials are heated more evenly.

Description

Technical Field

[0001] The utility model belongs to the technical field of sintering devices, in particular to a sintering furnace for producing zirconium oxide. Background Art

[0002] Zirconia, with the chemical formula ZrO2, is the main oxide of zirconium. It is usually white, odorless and tasteless crystals, and is difficult to dissolve in water, hydrochloric acid and dilute sulfuric acid. It is chemically inactive and has the properties of high melting point, high resistivity, high refractive index and low thermal expansion coefficient, making it an important high temperature resistant material, ceramic insulation material and ceramic sunscreen, and also the main raw material for artificial diamonds.

[0003] There are many methods for preparing zirconium oxide powder, among which the more common ones are coprecipitation method, sol-gel method, high-temperature combustion method, etc. Coprecipitation method has become the most commonly used method for preparing nano zirconium oxide because of its simple operation, easy control of reaction process, low cost and other reasons. The specific process of this method is: adding some stabilizers (such as Y(NO3)) and dispersants (such as PEG2000, etc.), making soluble zirconium salts (ZrOCl2·H2O, ZrCI4 or Zr(NO3)4, etc.) into salt solution, gradually adding precipitants (such as NH3·H2O, NaOH, H2NCONH2) to the salt solution, and reasonably controlling the pH value, and precipitating zirconium hydroxide gel and yttrium hydroxide gel through reaction, and then aging, filtering, water washing, alcohol washing, drying, calcination and other processes to obtain zirconium oxide powder. A sintering furnace is used during the calcination process.

[0004] The utility model patent "A horizontal induction sintering furnace with a rapid cooling structure" with publication number CN217005339U includes a furnace body, a feed port is provided on the outer surface of one side of the furnace body, support legs are fixedly installed near the four corners of the lower end of the furnace body, a feeding mechanism is provided on one side of the furnace body, and the feeding mechanism includes a support plate, the support plate is fixedly installed on one side of two support legs, a groove is provided on the outer surface of the upper end of the support plate near the middle position, and a cover plate is provided near one side of the upper end of the support plate. The discharge plate of the above-mentioned sintering furnace is plate-shaped and is mainly used to place objects with fixed shapes. However, in the preparation of zirconium oxide powder, the material to be calcined is generally granular or powdery. The discharge plate has a smaller capacity and a higher sintering efficiency. If the discharge plate is changed to a discharge trough, although the capacity is increased, it is easy to produce uneven temperature during the sintering process, which will affect the quality after sintering.

[0005] Therefore, there is an urgent need for a sintering furnace for zirconium oxide production to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to overcome the existing technical problems and provide a sintering furnace for producing zirconium oxide.

[0007] In order to achieve the above-mentioned purpose, the utility model is implemented according to the following technical scheme:

[0008] A sintering furnace for zirconium oxide production, comprising a sintering furnace body; the sintering furnace body comprises a horizontal furnace body and a furnace cover arranged on the right side of the furnace body; heating rods are distributed around the inside of the furnace body; and the furnace body also comprises a placement groove, a support table, and a support assembly;

[0009] The support platform includes a rectangular support plate and a support leg arranged below the support plate; a guide groove along the long side of the support plate is arranged at the center of the upper end surface of the support plate; two rectangular through grooves are arranged on the left side of the support plate, and the two through grooves are symmetrically arranged front and back along the guide groove;

[0010] The placement groove is in the shape of a semi-cylindrical body with an open upper end surface, and is fixedly arranged on the left side of the furnace cover; the size of the placement groove matches the interior of the furnace body; a plurality of running wheels A are arranged at the bottom of the placement groove from left to right; the furnace cover is a circular plate, and a running wheel B is arranged on the lower end surface of the furnace cover;

[0011] The support assembly includes a roller support assembly, a connecting plate, and a lifting assembly that are symmetrically arranged front and back; the roller support assembly includes a roller, a shaped part, and a support rod; the roller is rotatably arranged in the shaped part, and the support rod is fixedly connected to the bottom of the shaped part; the two support rods pass through two symmetrical through grooves front and back respectively, and their tails are fixedly connected through the connecting plate; the lifting assembly is connected to the support plate, and the lifting assembly drives the connecting plate to move up and down;

[0012] There is a moving channel for the travel wheel A to pass through at the bottom of the furnace body, and the moving channel matches the travel wheel A; the travel wheel B extends into the guide groove, and the travel wheel B can move left and right along the guide groove, driving the furnace cover to move left and right, and driving the placement groove to move into the furnace body or move out of the furnace body;

[0013] When the placement slot moves to above the support assembly, the roller support assembly rises to the uppermost position, and the roller contacts the lower portion of the placement slot.

[0014] Preferably, a handle is fixedly provided on the right side of the furnace cover, which is convenient for operators to hold and drive the furnace cover and the placement slot to move.

[0015] When the utility model is used, the material (powder or particles) to be sintered can be placed in the placement groove, and the placement groove is a groove type with depth, which increases the placement capacity.

[0016] The movable channel is provided to facilitate the movement of the traveling wheel A in the movable channel. The bottom of the furnace body in the utility model is not provided with a corresponding heating rod, thereby leaving a space for the traveling wheel to pass.

[0017] In actual use, the support assembly is used only when the furnace cover is located on the right side of the support assembly. The structure of the support assembly meets the requirements of supporting the placement slot and does not affect the left and right movement of the placement slot. The structure of the support assembly does not affect the movement of the walking wheel A and the walking wheel B.

[0018] Preferably, it also includes a stirring assembly; the stirring assembly includes a motor A, a rotating shaft, a plurality of front stirring rods, and a plurality of rear stirring rods;

[0019] The rotating shaft is coaxial with the placement slot, and the right end of the rotating shaft passes through the furnace cover and is rotatably connected with the furnace cover; the motor A is connected to the right end of the rotating shaft;

[0020] The front stirring rod is installed at the lower part of the front side of the rotating shaft, and the rear stirring rod is installed at the lower part of the rear side of the rotating shaft; the front stirring rod and the rear stirring rod are staggered from left to right; the angle between the projection of the front stirring rod toward the furnace cover and the projection of the rear stirring rod toward the furnace cover is 30 to 60 degrees;

[0021] Motor A drives the rotating shaft to rotate, driving the front stirring rod and the rear stirring rod to move in the placement tank.

[0022] Specifically, the projection of the front stirring rod toward the furnace cover and the projection of the rear stirring rod toward the furnace cover are projections along the direction of the rotation axis perpendicular to the furnace cover.

[0023] Preferably, the left end of the rotating shaft is close to the left inner wall of the placement groove; the ends of the front stirring rod and the rear stirring rod are close to the bottom side wall of the placement groove.

[0024] The stirring assembly is provided so that during the sintering process, the front stirring rod and the rear stirring rod can stir the material in the placement tank to avoid agglomeration during the sintering process and make the material heated more evenly during the sintering process. Motor A can control the rotating shaft to repeatedly rotate forward and backward at a certain angle, and the angle is controlled so that the front stirring rod and the rear stirring rod will not move outside the placement tank. The speed of motor A is controlled so that the material will not be stirred outside the placement tank. The control of motor A here is prior art, and those skilled in the art can control the rotation of motor A according to actual usage requirements, which will not be described in detail here.

[0025] Preferably, the lifting assembly includes an L-shaped support, a screw, a guide rod, and a motor B;

[0026] The L-shaped support is an integrated structure, including a horizontal part and a vertical part; the vertical part is located on the right side of the through slot and is fixedly connected to the support plate; the vertical downward projection of the through slot falls on the horizontal part; the head of the screw is rotatably connected to the bottom of the support plate between the two through slots, and the tail of the screw passes through the horizontal part and is connected to the motor B; there are two guide rods, which are symmetrically arranged on the front and rear sides of the screw; the head of the guide rod is fixedly connected to the bottom of the support plate between the two through slots, and the tail of the guide rod is fixedly connected to the upper end surface of the horizontal part; the connecting plate is threadedly connected to the screw, and the guide rod is slidably connected to the connecting plate; the motor B rotates to drive the screw to rotate, driving the connecting plate to move up and down.

[0027] The setting of the lifting assembly can control the lifting and lowering of the roller support assembly by controlling the rotation of the motor B. When the support placement slot is needed, the roller support assembly is raised; when it is not needed, the roller support assembly can be controlled to descend. The control is convenient and the use is flexible.

[0028] The furnace body involved in the utility model is a furnace body of a horizontal sintering furnace commonly used in the art, and its structure and operation method are well known to those skilled in the art. The furnace body may also involve conventional components such as an air intake assembly, an exhaust assembly, a temperature control assembly, etc., which are all arranged on the furnace body and are all prior art, and will not be further described here. The heating rod arranged in the furnace body can also be selected according to the actual heating temperature requirements. The material of each component of the utility model can be selected from the commonly used materials in the prior art according to the environment in which it is located. For example, the components that need to enter the furnace body need to adopt high temperature resistant materials; the components that need to contact with zirconium oxide use high temperature resistant materials that will not react with zirconium oxide, and will not contaminate zirconium oxide at high temperatures. Those skilled in the art can select matching materials in the prior art according to actual usage requirements.

[0029] Components not limited in the present invention all adopt conventional means in the field. Those skilled in the art can select their models and installation methods according to actual usage requirements and clearly understand how to install and control them, which will not be described in detail here.

[0030] The utility model achieves the following beneficial effects:

[0031] The utility model has a simple structure and is easy to operate; the placement tank of the utility model has a larger capacity, which is convenient for calcining more materials at one time, and is provided with a stirring component, which can stir the materials in the placement tank during the calcination process to make them heated more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0033] Figure 2 for Figure 1A partial cross-sectional view along line EE;

[0034] Figure 3 for Figure 1 Sectional view along line FF;

[0035] Figure 4 for Figure 2 Schematic diagram of the state of the middle roller support assembly after it is lowered.

[0036] In the figure: 1. furnace body; 2. furnace cover; 3. heating rod; 4. placement groove; 5. support plate; 6. support leg; 7. guide groove; 8. through groove; 9. walking wheel A; 10. walking wheel B; 11. connecting plate; 12. roller; 13. shaped part; 14. support rod; 15. moving channel; 16. vertical part; 17. handle; 18. motor A; 19. rotating shaft; 20. front stirring rod; 21. rear stirring rod; 22. screw; 23. guide rod; 24. motor B; 25. horizontal part. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The schematic embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0038] Example 1

[0039] like Figures 1 to 4 As shown, a sintering furnace for zirconium oxide production includes a sintering furnace body; the sintering furnace body includes a horizontal furnace body 1 and a furnace cover 2 arranged on the right side of the furnace body; a plurality of heating rods 3 are distributed around the inside of the furnace body; it also includes a placement groove 4, a support platform, and a support assembly; the furnace cover and the furnace body are detachably sealed and connected, and a flange connection can be used specifically.

[0040] The support platform includes a rectangular support plate 5 and a support leg 6 arranged below the support plate; a guide groove 7 along the long side of the support plate is arranged at the center of the upper end surface of the support plate; two rectangular through grooves 8 are arranged on the left side of the support plate, and the two through grooves are symmetrically arranged along the guide groove;

[0041] The placement groove is a semi-cylindrical shape with an open upper end surface, and the placement groove is fixedly arranged on the left side of the furnace cover; the size of the placement groove matches the interior of the furnace body; a plurality of running wheels A9 are arranged at the bottom of the placement groove from left to right; the furnace cover is a circular plate, and a running wheel B10 is arranged on the lower end surface of the furnace cover;

[0042] The support assembly includes roller support assemblies symmetrically arranged front and back, a connecting plate 11, and a lifting assembly; the roller support assembly includes rollers 12, U-shaped members 13, and support rods 14; the rollers are rotatably arranged within the U-shaped members, and the support rods are fixedly connected to the bottoms of the U-shaped members; the two support rods respectively pass through two symmetrically arranged through slots front and back, and their tails are fixedly connected through the connecting plate; the lifting assembly is connected to the support plate, and the lifting assembly drives the connecting plate to move up and down; when the lifting assembly moves to the lowest position, the uppermost end of the roller support assembly does not exceed the upper end surface of the support plate.

[0043] At the bottom inside the furnace body, there is a moving channel 15 for the traveling wheel A to pass through, and the moving channel matches the traveling wheel A; the traveling wheel B extends into the guiding groove, and the traveling wheel B can move left and right along the guiding groove, driving the furnace cover to move left and right, and driving the placement groove to move into or out of the furnace body.

[0044] When the placement groove moves above the support assembly, the roller support assembly rises to the highest position, and the rollers contact the lower part of the placement groove.

[0045] A handle 17 is fixedly arranged on the right side surface of the furnace cover.

[0046] It further includes a stirring assembly; the stirring assembly includes a motor A 18, a rotating shaft 19, a plurality of front stirring rods 20, and a plurality of rear stirring rods 21.

[0047] The rotating shaft is coaxial with the placement groove, the right end of the rotating shaft penetrates through the furnace cover and is rotatably connected to the furnace cover; the motor A is connected to the right end of the rotating shaft.

[0048] The front stirring rods are installed at the lower part on the front side of the rotating shaft, and the rear stirring rods are installed at the lower part on the rear side of the rotating shaft; the front stirring rods and the rear stirring rods are alternately distributed in sequence from left to right; the included angle between the projection of the front stirring rods towards the furnace cover and the projection of the rear stirring rods towards the furnace cover is 60 degrees.

[0049] The motor A drives the rotating shaft to rotate, driving the front stirring rods and the rear stirring rods to move within the placement groove. The left end of the rotating shaft is close to the left inner wall of the placement groove; the ends of the front stirring rods and the rear stirring rods are close to the bottom side walls of the placement groove.

[0050] The lifting assembly includes an L-shaped support member, a screw rod 22, a guiding rod 23, and a motor B 24.

[0051] The L-shaped support is an integrated structure, including a horizontal portion 25 and a vertical portion 16; the vertical portion is located on the right side of the through slot and is fixedly connected to the support plate; the vertical downward projection of the through slot falls on the horizontal portion; the head of the screw is rotatably connected to the bottom of the support plate between the two through slots, and the tail of the screw passes through the horizontal portion and is connected to the motor B; there are two guide rods, which are symmetrically arranged on the front and rear sides of the screw; the head of the guide rod is fixedly connected to the bottom of the support plate between the two through slots, and the tail of the guide rod is fixedly connected to the upper end surface of the horizontal portion; the connecting plate is threadedly connected to the screw, and the guide rod is slidably connected to the connecting plate; the motor B rotates to drive the screw to rotate, driving the connecting plate to move up and down.

[0052] When this embodiment is in use, the placement slot is located on the right side of the furnace body as a whole, and then the material to be calcined can be placed in the placement slot. At this time, the roller support assembly moves to the top to support the placement slot; when the material is placed, the furnace cover is pushed to push the placement slot into the furnace body; when the furnace cover is close to the roller support assembly, the roller support assembly is driven to descend to prevent it from hindering the movement of the furnace cover. Then the placement slot is sent into the furnace body as a whole, and then the furnace cover and the furnace body are sealed and connected, and the material in the placement slot begins to be sintered. During the sintering process, the drive shaft is slowly rotated at a certain angle (in this embodiment, the maximum angle of rotation of the front stirring rod or the rear stirring rod is 120°) to stir the material in the placement slot so that it is heated more evenly. After sintering is completed, when the material is cooled to the point where it can be taken out, the placement slot is pulled out, and then the front stirring rod or the rear stirring rod is slowly rotated to the top, and then the material in the placement slot can be collected.

[0053] The technical solution of the present utility model is not limited to the above-mentioned specific embodiments, and all technical variations made according to the technical solution of the present utility model fall within the protection scope of the present utility model.

Claims

1. A sintering furnace for zirconium oxide production, comprising a sintering furnace body; the sintering furnace body comprises a horizontal furnace body and a furnace cover arranged on the right side of the furnace body; heating rods are distributed around the furnace body; Features: It also includes a placement slot, a support table, and a support assembly; The support platform includes a rectangular support plate and a support leg arranged below the support plate; a guide groove along the long side of the support plate is arranged at the center of the upper end surface of the support plate; two rectangular through grooves are arranged on the left side of the support plate, and the two through grooves are symmetrically arranged front and back along the guide groove; The placement groove is in the shape of a semi-cylindrical body with an open upper end surface, and is fixedly arranged on the left side of the furnace cover; the size of the placement groove matches the interior of the furnace body; a plurality of running wheels A are arranged at the bottom of the placement groove from left to right; the furnace cover is a circular plate, and a running wheel B is arranged on the lower end surface of the furnace cover; The support assembly includes a roller support assembly, a connecting plate, and a lifting assembly that are symmetrically arranged front and back; the roller support assembly includes a roller, a shaped part, and a support rod; the roller is rotatably arranged in the shaped part, and the support rod is fixedly connected to the bottom of the shaped part; the two support rods pass through two symmetrical through grooves front and back respectively, and their tails are fixedly connected through the connecting plate; the lifting assembly is connected to the support plate, and the lifting assembly drives the connecting plate to move up and down; There is a moving channel for the travel wheel A to pass through at the bottom of the furnace body, and the moving channel matches the travel wheel A; the travel wheel B extends into the guide groove, and the travel wheel B can move left and right along the guide groove, driving the furnace cover to move left and right, and driving the placement groove to move into the furnace body or move out of the furnace body; When the placement slot moves to above the support assembly, the roller support assembly rises to the uppermost position, and the roller contacts the lower portion of the placement slot.

2. A sintering furnace for zirconium oxide production according to claim 1, Features: It also includes a stirring assembly; the stirring assembly includes a motor A, a rotating shaft, a plurality of front stirring rods, and a plurality of rear stirring rods; The rotating shaft is coaxial with the placement slot, and the right end of the rotating shaft passes through the furnace cover and is rotatably connected with the furnace cover; the motor A is connected to the right end of the rotating shaft; The front stirring rod is installed at the lower part of the front side of the rotating shaft, and the rear stirring rod is installed at the lower part of the rear side of the rotating shaft; the front stirring rod and the rear stirring rod are staggered from left to right; the angle between the projection of the front stirring rod toward the furnace cover and the projection of the rear stirring rod toward the furnace cover is 30 to 60 degrees; Motor A drives the rotating shaft to rotate, driving the front stirring rod and the rear stirring rod to move in the placement tank.

3. A sintering furnace for zirconium oxide production according to claim 2, Features: The lifting assembly includes an L-shaped support, a screw rod, a guide rod, and a motor B; The L-shaped support is an integrated structure, including a horizontal part and a vertical part; the vertical part is located on the right side of the through slot and is fixedly connected to the support plate; the vertical downward projection of the through slot falls on the horizontal part; the head of the screw is rotatably connected to the bottom of the support plate between the two through slots, and the tail of the screw passes through the horizontal part and is connected to the motor B; there are two guide rods, which are symmetrically arranged on the front and rear sides of the screw; the head of the guide rod is fixedly connected to the bottom of the support plate between the two through slots, and the tail of the guide rod is fixedly connected to the upper end surface of the horizontal part; the connecting plate is threadedly connected to the screw, and the guide rod is slidably connected to the connecting plate; the motor B rotates to drive the screw to rotate, driving the connecting plate to move up and down.

Images