Sublimation Furnace for Hafnium Metal Production and Control Method

Abstract

The present invention relates to the field of sublimation furnaces for hafnium metal production, and discloses a sublimation furnace for hafnium metal production and a control method. The sublimation furnace includes a base plate. The upper end of the base plate is connected and fixed with a fixing table by bolts. The upper end of the fixing table is connected and fixed with a support frame by screws. Through a metal screening mechanism, with a filter mesh plate and an internal filter cylinder, larger metal particles will be blocked by the mesh plate, while smaller particles will enter the lower part through the filter slot holes. The pushing plate pushes the material above the filter mesh plate as the rotating rod rotates, helping the material to pass through the filter mesh plate better and accelerating the screening speed of the particles. This can avoid uneven temperature distribution during the sublimation process in the sublimation furnace due to differences in the size of metal particles. Smaller particles have a larger surface area and will be heated and sublimated faster, while larger particles require a longer time to complete heating and sublimation, preventing local overheating or incomplete sublimation caused by uneven temperature distribution inside the sublimation furnace and ensuring more uniform temperature distribution inside the sublimation furnace.

Description

Technical Field

[0001] The present invention relates to the field of sublimation furnaces for hafnium metal production, and particularly to a sublimation furnace for hafnium metal production and a control method therefor. Background Art

[0002] The production process of hafnium metal usually requires a series of high-temperature treatments, and the sublimation furnace plays an important role therein. As an important device in metal purification, smelting and processing, the sublimation furnace is mainly used to sublime metals or metal compounds into gaseous state under high-temperature conditions, and then re-condense them into metals or alloys through cooling or other means. This process has important applications in metal purification, alloying and other smelting processes. The sublimation furnace uses high-temperature heating of metal materials to directly transform them from solid state to gaseous state (sublimation) at high temperature, and then re-condenses the metal gas into solid metal or alloy through cooling and other operations (such as deposition, collection). This process can remove impurities in the metal to obtain metal products with higher purity. Generally, the temperature inside the sublimation furnace needs to be controlled very precisely.

[0003] However, in practical applications, when metal raw materials are put into the furnace and heated to gradually increase the temperature, the temperature inside the sublimation furnace needs to be gradually increased to the sublimation point of the metal, that is, the temperature at which the metal transforms from solid state to gaseous state. At a sufficiently high temperature, the metal will sublime and transform from solid state to gaseous state. The sublimation temperatures of different metals are different, and the sublimation furnace needs to precisely control the temperature. During the sublimation process, the impurities of the metal usually do not sublime together with the metal vapor. The impurity substances will deposit in different areas inside the furnace or exist in other forms in the gas, so as to achieve the purpose of removing impurities. After the metal sublimes, the metal vapor is transported to the condensation area through the airflow inside the furnace. In the condensation area, the temperature gradually decreases, and the metal vapor begins to condense into solid metal. The condensation system usually includes a cooler or a condenser, which uses a cooling medium (such as water or gas) to lower the temperature of the metal vapor. The condensed metal solid will deposit on the surface of the condenser or other collection devices and can be collected for subsequent processing.

[0004] Since the metal raw materials put into the furnace for the sublimation process include particles with different sizes and shapes, the size differences of the metal particles may lead to uneven temperature distribution during the sublimation process. The smaller particles have a larger surface area and may sublime faster, while the larger particles may take longer to complete sublimation, resulting in uneven temperature distribution inside the sublimation furnace. The larger particles may cause delays in the sublimation process due to uneven heating, and even local overheating or incomplete sublimation may occur. Summary of the Invention

[0005] To solve the above technical problems, a sublimation furnace for hafnium metal production and a control method are provided. This technical solution solves the problem proposed in the above background technology that during the sublimation process of putting metal raw materials into the furnace, the metal raw materials include particles with different sizes and shapes. The size difference of metal particles may lead to uneven temperature distribution during the sublimation process. Smaller particles have a larger surface area and may sublimate faster, while larger particles may require a longer time to complete sublimation, resulting in uneven temperature distribution inside the sublimation furnace. Larger particles may cause delays in the sublimation process due to uneven heating, and even local overheating or incomplete sublimation may occur.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: It includes a base plate. The upper end of the base plate is connected with a fixed platform by bolts. The upper end of the fixed platform is connected and fixed with a support frame by screws. The upper end of the support frame is fixedly installed with a sublimation furnace body. The upper end of the sublimation furnace body is installed with a feeding port. Inside the sublimation furnace body, there is a heating furnace body. Inside the heating furnace body, there is a placement inner wall. On both outer sides of the sublimation furnace body, there are outer ring plates. One end of the sublimation furnace body and the outer ring plate is fixedly installed with a heat insulation backing plate;

[0007] A metal screening mechanism is arranged beside the sublimation furnace body;

[0008] An air suction and pumping feeding mechanism is fixedly installed above the feeding port;

[0009] A cooling mechanism is arranged on both sides of the sublimation furnace body;

[0010] A moving mechanism is installed at the lower end of the base plate;

[0011] An adjusting mechanism is arranged at the upper end of the sublimation furnace body.

[0012] Preferably, the metal screening mechanism includes a support base. The upper end of the support base is fixedly installed with a support fixing frame. The support fixing frame is connected to both sides of the metal screening tank by screws. Inside the metal screening tank, there is an internal filter cylinder. The internal filter cylinder is connected and fixed to the inside of the metal screening tank by fasteners. The lower end of the internal filter cylinder is installed with a filter screen plate. Filter slots are opened inside the filter screen plate.

[0013] Preferably, a tank cover is installed at the upper end of the metal screening tank. A feeding hopper is installed at the upper end of the tank cover. A servo motor is connected to the upper end of the tank cover by screws. A rotating rod is installed at the lower end of the servo motor. Stirring rods are fixedly installed on the outer side of the rotating rod. The stirring rods are arranged inside the internal filter cylinder.

[0014] Preferably, a push plate is fixedly installed on the outer side of the rotating rod. The lower end of the push plate contacts the upper surface of the filter mesh plate. Push-through holes are formed in the outer sides of the metal screening tank and the built-in filter cylinder.

[0015] Preferably, a discharge pipe is fixedly installed inside the push-through hole. A screw rod is installed inside the discharge pipe. One end of the screw rod is fixedly installed with a micro motor. An outlet pipe is installed at the lower end of the discharge pipe.

[0016] Preferably, the air suction and pumping feeding mechanism includes a conveying pipe. One end of the conveying pipe is fixedly installed at the lower end of the metal screening tank. One end of the conveying pipe is installed inside a connecting sleeve. One end of the connecting sleeve is installed on the upper end of a fixed disc. The lower end of the air suction and pumping feeding mechanism is installed on the upper end of a feeding port.

[0017] Preferably, the cooling mechanism includes a connecting block. A main valve is installed at one end of the connecting block. A hollow structure is formed inside the connecting block. Cooling circulation pipes are installed at the upper and lower ends of the connecting block. One end of the cooling circulation pipe is installed with a connecting valve. One end of the connecting valve is installed on both side ends of the sublimation furnace body and the fixed table.

[0018] Preferably, the moving mechanism includes a fixed frame. The upper end of the fixed frame is fixedly installed at the lower end of a base plate. An adjusting motor is arranged inside the fixed frame. A threaded rod is installed at the lower end of the adjusting motor. The threaded rod is rotationally connected inside a support chassis.

[0019] Preferably, the moving mechanism includes a fixed frame. The upper end of the fixed frame is fixedly installed at the lower end of a base plate. An adjusting motor is arranged inside the fixed frame. A threaded rod is installed at the lower end of the adjusting motor. The threaded rod is rotationally connected inside a support chassis. The support chassis is arranged inside a support cylinder. The upper end of the support cylinder is installed at the lower end of the fixed frame. The support chassis can move up and down inside the support cylinder for adjustment. An installation bracket is fixedly installed on the outer side of the support cylinder. The installation bracket is rotationally connected with a roller.

[0020] Preferably, the adjusting mechanism includes a connecting plate which is connected to the upper end of the furnace cover by screws. The furnace cover is closed at both ends of the sublimation furnace body. A first fixed column is fixedly installed at the upper end of the connecting plate. A rotating sleeve is rotatably connected to the outside of the first fixed column. A telescopic guide column is installed on the outside of the rotating sleeve. One end of the telescopic guide column is installed inside a telescopic hydraulic cylinder. One end of the telescopic hydraulic cylinder is installed on one end of a movable sleeve plate. The movable sleeve plate is rotatably connected to the outside of a second fixed column. The lower end of the second fixed column is installed at the upper end of a support plate. The lower end of the support plate is connected to the upper end of the sublimation furnace body by screws. A concave fixed frame is fixedly installed on one side of the outer plate of the sublimation furnace body. A hinge bolt is installed on the concave fixed frame. The hinge bolt passes through the inside of a rotating plate. The concave fixed frame is fixedly installed on one side of the furnace cover. A temperature sensor is arranged at one end of the furnace cover. A handle is installed at one end of the temperature sensor.

[0021] Compared with the prior art, the present invention provides a sublimation furnace and a control method for hafnium metal production, having the following beneficial effects:

[0022] First, through the synergistic effect of the built-in filter cylinder, filter mesh plate and push plate, the present invention realizes the efficient grading and screening of metal particles. The built-in filter cylinder adopts a multi-layer filter slot structure. Combined with the stirring rod and rotating push plate driven by a servo motor, it can dynamically disperse materials and accelerate the passage of small particles during the screening process, while pushing large particles to the discharge pipe directionally. This design effectively solves the problems of easy blockage and low efficiency of traditional screening equipment, ensures that the particle size of metal particles entering the sublimation furnace is uniform, avoids the phenomenon of uneven heating caused by particle size differences from the source, significantly improves the stability of the temperature field in the furnace, and makes the sublimation reaction more uniform and controllable.

[0023] Second, the air suction and pumping feeding mechanism of the present invention innovatively adopts a dual-mode linkage mechanism of negative pressure conveying and spiral discharging. The screened small particles are accurately conveyed to the feeding port through a negative pressure pipeline, while the large particles are forcibly discharged by a screw rod driven by a micro motor, forming a closed-loop material processing system. The specially designed fixed disc connection structure ensures the pipeline sealing performance and realizes an almost complete material conveying efficiency. This design not only greatly improves the continuity of material conveying, but also significantly enhances the feeding uniformity of the sublimation furnace through intelligent control, reducing the frequency of manual intervention and the risk of production interruption.

[0024] Thirdly, the adjustment mechanism of the present invention creatively adopts a hydraulic-mechanical linkage intelligent lid-opening system. By driving a multi-stage rotating sleeve structure through a telescopic hydraulic cylinder and cooperating with the real-time feedback of a temperature sensor, it realizes the dynamic matching of the opening and closing angle of the furnace lid and the sublimation temperature. This mechanism can accurately control the temperature fluctuation range inside the furnace, achieving fast response and stable adjustment. The special design of the concave fixed frame and the hinge bolt makes the movement trajectory of the furnace lid more precise, significantly improving the maintenance operation efficiency while ensuring high-temperature sealing, reducing heat energy loss and operation safety hazards at the same time.

[0025] Fourthly, the cooling mechanism of the present invention adopts a modular layered cooling design. By realizing the coolant shunt through the hollow structure in the connecting block and cooperating with an adjustable connecting valve, it forms a gradient cooling effect. The cooling circulation pipe is spirally distributed along the axial direction of the sublimation furnace body, greatly increasing the heat exchange area and making the temperature gradient in the condensation area more in line with the requirements of metal vapor condensation kinetics. This design significantly improves the metal vapor condensation efficiency, obtains high-purity crystal products, reduces the energy consumption of the cooling system, and prolongs the continuous and stable operation time of the equipment.

[0026] Fifthly, the moving mechanism of the present invention creatively combines screw lifting and universal wheels. By driving the double screw rods to synchronously lift and support the chassis through an adjustment motor, it realizes the rapid conversion of the equipment between the moving state and the working state. The guiding structure in the support cylinder ensures the high precision of the lifting process. Cooperating with the strengthened installation bracket, it can stably carry heavy equipment. This design greatly shortens the equipment positioning time, significantly improves the site adaptability, is especially suitable for the flexible production scenario of multi-production line cooperation, and qualitatively improves the equipment deployment efficiency. Brief Description of the Drawings

[0027] Figure 1 is a schematic diagram of the overall structure from the first perspective of the present invention;

[0028] Figure 2 is a schematic diagram of the overall structure from the second perspective of the present invention;

[0029] Figure 3 is a schematic diagram of the structure of the built-in filter cartridge and the metal screening tank of the present invention;

[0030] Figure 4 is a schematic diagram of the structure of the filter screen plate, the filter slot holes and the stirring rod of the present invention;

[0031] Figure 5 is a schematic diagram of the structure of the push plate and the rotating rod of the present invention;

[0032] Figure 6 is a schematic diagram of the structure of the screw rod and the micro motor of the present invention;

[0033] Figure 7 is a schematic diagram of the structure of the adjustment mechanism and the furnace lid of the present invention;

[0034] Figure 8 Structural schematic diagram of the heat insulation backing plate, heating furnace body and outer ring plate of the present invention;

[0035] Figure 9 Structural schematic diagram of the moving mechanism and fixed platform of the present invention;

[0036] Figure 10 Structural schematic diagram of the support chassis, mounting bracket and roller of the present invention;

[0037] Figure 11 Structural schematic diagram of the support cylinder and threaded rod of the present invention.

[0038] The reference numerals in the figure are:

[0039] 1. Base plate; 101. Furnace cover; 102. Sublimation furnace body; 103. Fixed platform; 104. Temperature sensor; 105. Handle; 106. Heat insulation backing plate; 107. Heating furnace body; 108. Placing inner wall; 109. Feeding port; 110. Support frame; 111. Outer ring plate;

[0040] 2. Metal screening mechanism; 201. Support base; 202. Tank cover; 203. Feed hopper; 204. Metal screening tank; 205. Support fixing frame; 206. Fastener; 208. Discharge pipe; 209. Built-in filter cartridge; 210. Servo motor; 211. Stirring rod; 212. Micro motor; 213. Outlet pipe; 214. Pushing through hole; 215. Filter screen plate; 216. Filter slot hole; 217. Rotating rod; 218. Pushing plate; 219. Screw rod;

[0041] 3. Air suction and pumping feeding mechanism; 301. Conveying pipe; 302. Fixed disc; 303. Connecting sleeve;

[0042] 4. Cooling mechanism; 401. Connecting block; 402. Main valve; 403. Connecting valve; 404. Cooling circulation pipe;

[0043] 5. Moving mechanism; 501. Fixed frame; 502. Support chassis; 503. Adjusting motor; 504. Mounting bracket; 505. Roller; 508. Support cylinder; 509. Threaded rod;

[0044] 6. Adjusting mechanism; 601. Connecting plate; 602. First fixed column; 603. Rotating sleeve; 604. Telescopic guide post; 605. Telescopic hydraulic cylinder; 606. Second fixed column; 607. Support plate; 608. Movable sleeve plate; 609. Hinge bolt; 610. Concave fixed frame; 611. Rotating plate. Detailed implementation manners

[0045] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and other obvious variations can be conceived by those skilled in the art.

[0046] Please refer to Figures 1-2 、 Figure 8 as shown in the figure, the sublimation furnace for hafnium metal production includes:

[0047] A base plate 1, the upper end of the base plate 1 is connected with a fixing platform 103 by bolts, the upper end of the fixing platform 103 is connected and fixed with a support frame 110 by screws, the upper end of the support frame 110 is fixedly installed with a sublimation furnace body 102, the upper end of the sublimation furnace body 102 is installed with a feeding port 109, a heating furnace body 107 is installed inside the sublimation furnace body 102, a placing inner wall 108 is arranged inside the heating furnace body 107, outer ring plates 111 are installed on both outer sides of the sublimation furnace body 102, and a heat insulation cushion plate 106 is fixedly installed at one end of the sublimation furnace body 102 and the outer ring plate 111;

[0048] A metal screening mechanism 2, the metal screening mechanism 2 is arranged beside the sublimation furnace body 102;

[0049] An air suction and pumping feeding mechanism 3, the air suction and pumping feeding mechanism 3 is fixedly installed at the upper end of the feeding port 109;

[0050] A cooling mechanism 4, the cooling mechanism 4 is arranged on both sides of the sublimation furnace body 102;

[0051] A moving mechanism 5, the moving mechanism 5 is installed at the lower end of the base plate 1;

[0052] An adjusting mechanism 6, the adjusting mechanism 6 is arranged at the upper end of the sublimation furnace body 102.

[0053] Please refer to Figures 1-6As shown, the metal screening mechanism 2 includes a support base 201. A support fixing frame 205 is fixedly installed at the upper end of the support base 201. The support fixing frame 205 is connected to both sides of the metal screening tank 204 by screws. An internal filter cylinder 209 is arranged inside the metal screening tank 204. The internal filter cylinder 209 is connected and fixed to the inner side of the metal screening tank 204 through a fastener 206. A filter screen plate 215 is installed at the lower end of the internal filter cylinder 209. Filter slots 216 are formed inside the filter screen plate 215. A tank cover 202 is installed at the upper end of the metal screening tank 204. A feed hopper 203 is installed at the upper end of the tank cover 202. A servo motor 210 is connected to the upper end of the tank cover 202 by screws. A rotating rod 217 is installed at the lower end of the servo motor 210. Stirring rods 211 are fixedly installed on the outer side of the rotating rod 217. The stirring rods 211 are arranged inside the internal filter cylinder 209. A pushing plate 218 is fixedly installed on the outer side of the rotating rod 217. The lower end of the pushing plate 218 contacts the upper surface of the filter screen plate 215. Push-through holes 214 are formed on the outer sides of the metal screening tank 204 and the internal filter cylinder 209. A discharge pipe 208 is fixedly installed inside the push-through holes 214. A screw rod 219 is installed inside the discharge pipe 208. A micro motor 212 is fixedly installed at one end of the screw rod 219. An outlet pipe 213 is installed at the lower end of the discharge pipe 208.

[0054] During actual use, the metal materials to be screened enter the metal screening tank 204 through the feed hopper 203. The servo motor 210 is started to drive the rotation of the rotating rod 217. The rotating rod 217 drives the stirring rods 211 to stir the materials in the metal screening tank 204, ensuring uniform distribution of the materials, preventing particle accumulation, and helping the particles to pass through the filter screen plate 215. The materials pass through the filter screen plate 215 of the internal filter cylinder 209. Larger metal particles will be blocked by the screen plate, while smaller particles will enter the lower part through the filter slots 216. The pushing plate 218 pushes the materials above the filter screen plate 215 as the rotating rod 217 rotates, helping the materials to better pass through the filter screen plate 215 and accelerating the particle screening speed. When the screening of the particle size of the metal raw materials is completed, the larger metal particles will remain above the filter screen plate 215. Through the rotation of the pushing plate 218, the larger metal raw materials are pushed into the push-through holes 214. Then, the micro motor 212 is driven to drive the screw rod 219 to rotate inside the discharge pipe 208, further pushing the larger metal raw materials to the outlet pipe 213 for discharge. This can avoid uneven temperature distribution during the sublimation process caused by differences in the size of metal particles. Smaller particles have a larger surface area and will sublimate faster, while larger particles require a longer time to complete sublimation, preventing local overheating or incomplete sublimation due to uneven temperature distribution inside the sublimation furnace.

[0055] Through the metal screening mechanism 2, via the filter mesh plate 215 and the built-in filter cylinder 209, larger metal particles will be blocked by the mesh plate, while smaller particles will enter the lower part through the filter slots 216. The pushing plate 218 pushes the material above the filter mesh plate 215 as the rotating rod 217 rotates, helping the material to better pass through the filter mesh plate 215 and accelerating the particle screening speed. This can avoid uneven temperature distribution during the sublimation process in the sublimation furnace due to differences in the size of metal particles. Smaller particles have a larger surface area and will heat and sublime faster, while larger particles require a longer time to complete heating and sublimation, preventing local overheating or incomplete sublimation caused by uneven temperature distribution inside the sublimation furnace and ensuring a more uniform temperature distribution inside the sublimation furnace. The accumulated metal raw materials can be dispersed by the stirring rod 211 to prevent the accumulation of metal particles.

[0056] Please refer to Figures 1-2 、 Figure 8 As shown, the air suction and pumping feeding mechanism 3 includes a conveying pipeline 301. One end of the conveying pipeline 301 is fixedly installed at the lower end of the metal screening tank 204. One end of the conveying pipeline 301 is installed inside a connecting sleeve 303. One end of the connecting sleeve 303 is installed at the upper end of a fixed disc 302. The lower end of the air suction and pumping feeding mechanism 3 is installed at the upper end of the feeding port 109. During actual use, when the motor starts, the impeller starts to rotate at high speed. The rotation of the impeller causes the gas to be affected by the centrifugal force, thus forming a low-pressure area at the impeller inlet. Due to the rotation of the impeller, a negative pressure area will be formed at the impeller inlet. This negative pressure area causes the metal material to be sucked in, and then the screened metal particle raw materials at the bottom of the metal screening tank 204 are conveyed through the conveying pipeline 301, and further the metal particle raw materials are conveyed into the sublimation furnace.

[0057] Please refer to Figure 1 、 Figure 7As shown, the cooling mechanism 4 includes a connecting block 401. One end of the connecting block 401 is equipped with a main valve 402. The interior of the connecting block 401 is provided with a hollow structure. The upper and lower ends of the connecting block 401 are installed with cooling circulation pipes 404. One end of the cooling circulation pipe 404 is installed with a connecting valve 403. One end of the connecting valve 403 is installed on both side ends of the sublimation furnace body 102 and the fixed table 103. During actual use, when the sublimation furnace is operating, the main valve 402 is adjusted to allow the coolant to start flowing into the cooling circulation pipe 404. The coolant flows through the cooling circulation pipe 404 and contacts both sides of the sublimation furnace body 102 and the fixed table 103, absorbing heat through heat exchange. The connecting valve 403 adjusts the coolant flow rate as needed, and the heat can be evenly removed. The coolant will flow through each cooling circulation pipe 404. The flowing coolant continuously absorbs heat. The coolant that has absorbed heat flows back through the cooling system. After being cooled by the cooling equipment, it re-enters the cooling circulation pipe 404 to continue heat exchange. Condensation process: After the metal sublimes, the metal vapor is transported to the condensation area by the gas flow in the furnace. In the condensation area, the temperature gradually decreases, and the metal vapor begins to condense into solid metal. The condensation system usually includes a cooler or condenser, which uses a cooling medium (such as water or gas) to lower the temperature of the metal vapor. The condensed metal solid will be deposited on the surface of the condenser or other collection devices.

[0058] Please refer to Figure 1 、 Figures 9-11 As shown, the moving mechanism 5 includes a fixed frame 501. The upper end of the fixed frame 501 is fixedly installed at the lower end of the base plate 1. Inside the fixed frame 501, there is an adjustment motor 503. The lower end of the adjustment motor 503 is installed with a threaded rod 509. The threaded rod 509 is rotationally connected inside the support chassis 502. The support chassis 502 is arranged inside the support cylinder 508. The upper end of the support cylinder 508 is installed at the lower end of the fixed frame 501. The support chassis 502 can be adjusted to move up and down inside the support cylinder 508. The outside of the support cylinder 508 is fixedly installed with a mounting bracket 504. The mounting bracket 504 is rotationally connected with a roller 505. During actual use, first, when the whole device is moved to other areas for placement, by driving the adjustment motor 503 to drive the threaded rod 509 to rotate, further driving the support chassis 502 to move up and down, and then moving up and down inside the support cylinder 508. When the support chassis 502 moves downward, the support chassis 502 contacts the ground, and the whole device can be supported, lifting the roller 505 off the ground.

[0059] Please refer to Figure 2 、 Figures 7-8As shown in the figure, the adjusting mechanism 6 includes a connecting plate 601. The connecting plate 601 is connected to the upper end of the furnace cover 101 by screws. The furnace cover 101 closes both ends of the sublimation furnace body 102. A first fixed column 602 is fixedly installed at the upper end of the connecting plate 601. A rotating sleeve 603 is rotatably connected to the outside of the first fixed column 602. A telescopic guide post 604 is installed on the outside of the rotating sleeve 603. One end of the telescopic guide post 604 is installed inside a telescopic hydraulic cylinder 605. One end of the telescopic hydraulic cylinder 605 is installed on one end of a movable sleeve plate 608. The movable sleeve plate 608 is rotatably connected to the outside of a second fixed column 606. The lower end of the second fixed column 606 is installed at the upper end of a support plate 607. The lower end of the support plate 607 is connected to the upper end of the sublimation furnace body 102 by screws. On one side of the outer ring plate 111 of the sublimation furnace body 102, a concave fixed frame 610 is fixedly installed. A hinge bolt 609 is installed on the concave fixed frame 610. The hinge bolt 609 passes through the inside of a rotating plate 611. The concave fixed frame 610 is fixedly installed on one side of the furnace cover 101. A temperature sensor 104 is provided at one end of the furnace cover 101. A handle 105 is installed at one end of the temperature sensor 104. The temperature sensor 104 is a common Pt100 RTD, which is commonly used to accurately measure medium temperature ranges.

[0060] During actual use, after the process of heating and sublimating the metal inside the sublimation furnace ends, the telescopic hydraulic cylinder 605 is driven to drive the telescopic guide post 604 to move, thereby driving the rotating sleeve 603 to rotate on the first fixed column 602, and further performing the opening and closing operations of the furnace cover 101. Moreover, the telescopic hydraulic cylinder 605 rotates through the rotation of the movable sleeve plate 608. When the furnace cover 101 is opened or closed, the hinge bolt 609 inside the concave fixed frame 610 rotates, which can reduce the need for staff to manually operate to open or close the furnace cover 101. Since this device is equipped with a temperature sensor 104 and a hydraulic regulation system, it can monitor the temperature inside the furnace in real time and adjust the opening and closing state of the furnace cover 101, ensuring that the temperature during the sublimation process is maintained within the set range, avoiding the influence of too high or too low temperature on the sublimation process, and effectively avoiding possible leakage or safety hazards during the sublimation process, especially for operations in high-temperature or high-pressure environments.

[0061] By driving the telescopic hydraulic cylinder 605, the telescopic guide post 604 and the rotating sleeve 603 are driven to rotate on the first fixed column 602, realizing the automatic opening and closing of the furnace cover 101, reducing the need for manual operation by staff, improving the operation efficiency and safety. The equipped temperature sensor 104 can monitor the temperature inside the sublimation furnace in real time, and adjust the opening and closing state of the furnace cover 101 through the hydraulic regulation system to ensure that the temperature during the sublimation process is maintained within the set range, avoiding the influence of too high or too low temperature on the sublimation process.

[0062] The working principle and control method of this device are as follows:

[0063] S1. Transport the metal raw materials into the sublimation furnace;

[0064] S2. Feed the metal materials to be screened into the metal screening tank 204 through the feed hopper 203. Start the servo motor 210 to drive the rotating rod 217 to rotate. The rotating rod 217 drives the stirring rod 211 to stir the materials in the metal screening tank 204 to prevent particle accumulation. And the particles pass through the filter mesh plate 215, and the materials pass through the filter mesh plate 215 of the built-in filter cylinder 209. Larger metal particles will be blocked by the mesh plate, while smaller particles will enter the lower part through the filter slot holes 216. The pushing plate 218 pushes the materials above the filter mesh plate 215 as the rotating rod 217 rotates, helping the materials to better pass through the filter mesh plate 215 and accelerating the particle screening speed. Then the filtered and screened metal particles enter the bottom of the metal screening tank 204;

[0065] S3. After the particle size screening of the metal raw materials is completed, the larger metal particles will remain above the filter mesh plate 215. Through the rotation of the pushing plate 218, the larger metal raw materials are pushed into the through hole 214. Then drive the micro motor 212 to drive the screw rod 219 to rotate inside the discharge pipe 208, and further push the larger metal raw materials to the outlet pipe 213 for discharge;

[0066] S4. When driven by the air suction and pumping feeding mechanism 3, after the motor starts, the impeller starts to rotate at a high speed. The rotation of the impeller causes the gas to be affected by the centrifugal force, thus forming a low-pressure area at the impeller inlet. Due to the rotation of the impeller, a negative pressure area will be formed at the impeller inlet. This negative pressure area causes the metal materials to be sucked in. Then the screened metal particle raw materials at the bottom of the metal screening tank 204 are transported through the conveying pipe 301, and further the metal particle raw materials are transported into the sublimation furnace;

[0067] S4. The sublimation furnace body 102 is the core part of the whole equipment. The internal heating furnace body 107 is set to realize the temperature control and the sublimation process. The heating furnace body 107 provides a necessary high-temperature environment. The outer ring plate 111 and the heat insulation cushion plate 106 reduce the heat loss and ensure that the temperature of the equipment is controlled. The metal is heated at a high temperature by the sublimation furnace to sublimate it into a gaseous substance. In this process, the impurities in the metal usually separate in the gaseous form, while the pure metal components continue to sublimate;

[0068] S5. When the sublimation furnace is in operation, the main valve 402 is adjusted to allow the coolant to start flowing into the cooling circulation pipe 404. The coolant flows through the cooling circulation pipe 404, contacts both sides of the sublimation furnace body 102 and the fixed table 103, and absorbs heat through heat exchange. The connecting valve 403 adjusts the coolant flow rate as needed, and the heat can be evenly removed. The coolant will flow through each cooling circulation pipe 404. The flowing coolant continuously absorbs heat, and the coolant that has absorbed heat flows back through the cooling system. After being cooled by the cooling equipment, it re-enters the cooling circulation pipe 404 to continue heat exchange. Condensation process: After the metal sublimes, the metal vapor is transported to the condensation area by the gas flow in the furnace. In the condensation area, the temperature gradually decreases, and the metal vapor begins to condense into solid metal. The condensation system usually includes a cooler or condenser, which uses a cooling medium (such as water or gas) to lower the temperature of the metal vapor. The condensed metal solid will be deposited on the surface of the condenser or other collection devices;

[0069] S6. When the process of heating and sublimating the metal inside the sublimation furnace ends, the telescopic hydraulic cylinder 605 is driven to drive the telescopic guide post 604 to move, thereby driving the rotating sleeve 603 to rotate on the first fixed column 602, and further performing the opening and closing operations on the furnace cover 101. Moreover, the telescopic hydraulic cylinder 605 rotates through the movable sleeve plate 608. When the furnace cover 101 is opened or closed, the hinge bolt 609 inside the concave fixed frame 610 rotates, which can reduce the need for staff to manually operate to open or close the furnace cover 101. Since the device is equipped with a temperature sensor 104 and a hydraulic regulation system, it can monitor the temperature inside the furnace in real time and adjust the opening and closing state of the furnace cover 101;

[0070] S7. First, when the overall equipment is moved to other areas for placement, the adjusting motor 503 is driven to drive the threaded rod 509 to rotate, further driving the support chassis 502 to move up and down, and then moving up and down inside the support cylinder 508. When the support chassis 502 moves downward, the support chassis 502 contacts the ground, and the overall equipment can be supported, lifting the rollers 505 off the ground.

[0071] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A sublimation furnace for producing metal hafnium, characterized in that: include: A base plate, the upper end of which is connected to a fixing platform by bolts, the upper end of which is fixed to a support frame by screws, and the upper end of which is equipped with a sublimation furnace body; A feeding port is arranged at the upper end of the sublimation furnace body, a heating furnace body is installed inside, an inner wall is arranged inside the heating furnace body, outer ring plates are arranged on both sides of the sublimation furnace body, and a heat insulation pad is arranged between the outer ring plate and the sublimation furnace body; A metal screening mechanism is arranged beside the sublimation furnace body; A suction pump feeding mechanism is fixedly installed on the upper end of the feeding port; A cooling mechanism is arranged on both sides of the sublimation furnace body; A moving mechanism, mounted on the lower end of the base plate; An adjusting mechanism is arranged at the upper end of the sublimation furnace body; The metal screening mechanism comprises a metal screening tank, a built-in filter cartridge is arranged inside the metal screening tank, the built-in filter cartridge is fixed to the inner side of the metal screening tank by a fastener, a filter screen plate is installed at the lower end, and a filter slot is arranged on the filter screen plate; A tank cover is installed on the upper end of the metal screening tank, and a feed hopper and a servo motor are arranged on the upper end of the tank cover; The lower end of the servo motor is connected to a rotating rod, a stirring rod is fixed outside the rotating rod, and the stirring rod is located inside the built-in filter cartridge; A push plate is fixed outside the rotating rod, and the lower end of the push plate contacts the surface of the filter screen plate; The metal screening tank and the outer side of the built-in filter cartridge are provided with push-in through holes; The suction pump feeding mechanism comprises a conveying pipeline, one end of which is connected to the lower end of the metal screening tank, and the other end is connected to a fixed disc through a connecting sleeve, and the fixed disc is installed at the upper end of the feeding port; The cooling mechanism comprises a connecting block, one end of which is provided with a main valve and the inside of which is provided with a hollow structure; The upper and lower ends of the connection block are connected to a cooling circulation pipe, and the cooling circulation pipe is connected to the sublimation furnace body and two sides of the fixing platform through a connecting valve.

2. The sublimation furnace for producing metal hafnium according to claim 1, characterized in that: The metal screening mechanism comprises a supporting base, a supporting frame is fixed on the upper end of the supporting base, and the supporting frame is connected to two sides of the metal screening tank by screws.

3. The sublimation furnace for producing metal hafnium according to claim 1, characterized in that: A discharge pipe is installed in the push-in through hole, and a spiral rod is arranged in the discharge pipe; One end of the spiral rod is connected to a micro motor, and an outlet pipe is arranged at the lower end of the discharge pipe.

4. The sublimation furnace for producing metal hafnium according to claim 1, characterized in that: The moving mechanism comprises a fixed frame, the upper end of which is fixed to the lower end of the base plate, and an adjusting motor is arranged inside the fixed frame; The lower end of the regulating motor is connected to a threaded rod, and the threaded rod is threadedly connected to the supporting chassis; The supporting chassis is arranged inside the bracket tube, the upper end of the bracket tube is connected to the lower end of the fixed frame, and a mounting bracket is arranged outside, and the mounting bracket is rotatably connected to the roller.

5. The sublimation furnace for producing metal hafnium according to claim 1, characterized in that: The adjustment mechanism includes a connecting plate, and the connecting plate is connected to the upper end of the furnace cover by screws; A first fixing column is fixed to the upper end of the connecting plate, and the outer side of the first fixing column is rotatably connected to the rotating sleeve; The outer side of the rotating sleeve is connected to a telescopic guide column, and one end of the telescopic guide column is connected to a telescopic hydraulic cylinder; One end of the telescopic hydraulic cylinder is connected to a movable sleeve plate, the movable sleeve plate is rotatably connected to a second fixed column, and the lower end of the second fixed column is fixed to a support plate; A concave fixing frame is provided on one side of the outer ring plate of the sublimation furnace body, and the concave fixing frame is connected to the rotating plate through a hinge bolt; A temperature sensor and a handle are arranged on one side of the furnace cover.

6. The control method for a sublimation furnace for producing metal hafnium according to any one of claims 1 to 5, characterized in that: include: S1, conveying the metal raw materials into the metal screening tank through the feed hopper; S2, start the servo motor to drive the rotating rod to rotate, drive the stirring rod to stir the material in the built-in filter cylinder, and at the same time, the push plate pushes the metal particles that meet the filter slot hole size through the filter screen plate, and the larger particles are retained above the screen plate; S3, start the micro motor to drive the screw rod to rotate in the discharge pipe, and discharge the retained larger particles through the outlet pipe; S4, the suction pump feeding mechanism feeds the screened metal particles into the heating furnace body through the feeding port through the conveying pipeline, and maintains the heating environment through the outer ring plate and the insulation pad; S5, the cooling circulation pipe adjusts the flow of the coolant through the connecting valve to perform heat exchange on the sublimation furnace body; S6, the telescopic hydraulic cylinder drives the rotating sleeve to drive the furnace cover to rotate around the hinge bolt, and the temperature sensor monitors the temperature in the furnace in real time; S7. Adjust the motor to drive the threaded rod to adjust the height of the supporting chassis so that the roller is off the ground to complete the positioning.

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