Molybdenum powder reduction furnace with controllable cooling effect

Abstract

The invention relates to the technical field of reduction furnaces, in particular to a molybdenum powder reduction furnace with a controllable cooling effect, which comprises a base, a controller is fixedly mounted on the left side of the base, a hydraulic pump is rotatably mounted at the upper end in the controller, and a rotating plate is rotatably mounted at the upper end of the hydraulic pump; and a first rotating motor is fixedly installed on the left side of the upper end of the rotating plate, a heating single pipe is rotationally installed in the calcining furnace, a heat exchange mechanism is fixedly installed between a second rotating motor and the outer surface of the cooling pipe, and a rotating stirring mechanism is fixedly installed on the side, close to the cooling pipe, of a sealing cover. Through the cooling pipe and the heat exchange mechanism, accurate control over the molybdenum powder cooling process is achieved. And ideal physical properties of the molybdenum powder are kept in the cooling process. The heat exchange mechanism is designed, so that heat exchange in the cooling pipe is more efficient, and the cooling effect and the controllable cooling effect are improved under the condition that oxygen is isolated as much as possible.

Description

Technical Field

[0001] This invention relates to the field of reduction furnace technology, specifically to a molybdenum powder reduction furnace with controllable cooling effect. Background Technology

[0002] Molybdenum powder is a powdery material with metallic molybdenum as its main component. It is typically grayish-black and possesses high purity, good plasticity, high-temperature resistance, and excellent electrical and thermal conductivity. Industrially, molybdenum powder is often prepared using the hydrogen reduction method, typically employing a hydrogen reduction furnace. This furnace uses hydrogen as a reducing agent to convert oxides into metals through a high-temperature reduction reaction. The furnace chamber is equipped with a rotating mechanism to ensure uniform heating of the molybdenum powder, and the furnace itself also has an adjustable angle for easy feeding and discharging.

[0003] The temperature of calcined molybdenum powder is very high, requiring cooling treatment. It is not advisable to remove it directly for cooling, as this can easily lead to oxidation. Usually, it is slowly cooled in the furnace in the absence of oxygen. However, furnace cooling usually relies on natural convection or limited forced circulation (such as slow flow of hydrogen). Heat can only be dissipated through heat conduction between molybdenum powder particles and heat exchange with the surrounding gas. There is a lack of efficient heat dissipation medium in direct contact. Furthermore, the molybdenum powder accumulates together in the furnace, resulting in a slow heat transfer rate. For special molybdenum powder that needs to be cooled as soon as possible after calcination, the cooling effect is uncontrollable, the cooling effect is not good enough, and the cooling efficiency is low. Summary of the Invention

[0004] The purpose of this invention is to provide a molybdenum powder reduction furnace with controllable cooling effect to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a molybdenum powder reduction furnace with controllable cooling effect, comprising a base, a controller fixedly installed on the left side of the base, a hydraulic pump rotatably installed at the upper end of the controller, a rotating plate rotatably installed at the upper end of the hydraulic pump, a first rotating motor fixedly installed on the left side of the upper end of the rotating plate, a calcining furnace fixedly installed on the upper end of the rotating plate to the right of the first rotating motor, two support seats fixedly installed on the upper right side of the rotating plate, a transition pipe and a cooling pipe respectively fixedly installed on the upper ends of the two support seats, a heating single tube rotatably installed inside the calcining furnace, a second rotating motor fixedly installed at the lower end of the outer surface of the cooling pipe, a cooling inner tube fixedly installed inside the cooling pipe, a heat exchange mechanism fixedly installed between the second rotating motor and the outer surface of the cooling pipe, an electric push rod fixedly installed at the right end of the outer surface of the cooling pipe, a sealing cover fixedly installed at the output end of the electric push rod, a limit slide fixedly installed at the lower end of the sealing cover, and a rotating stirring mechanism fixedly installed on the side of the sealing cover near the cooling pipe.

[0006] Preferably, the heat exchange mechanism includes a second rotating motor fixedly installed at the lower end of the cooling pipe. Two symmetrical collars are fixedly installed on the outer surface of the cooling pipe, and a toothed plate is movably installed between the two collars. The output end of the second rotating motor meshes with the toothed plate. A connecting plate is movably installed on the outer surface of the cooling pipe between the two collars. Three equidistant connecting plates are rotatably installed on the upper ends of the two collars, and a lifting frame is rotatably installed on the upper end of every two far apart connecting plates. A pressure plate is fixedly installed between the two lifting frames. A ventilation groove corresponding to the heat exchange mechanism is opened on the inner wall of the inner cooling pipe.

[0007] Preferably, a metal filter screen is fixedly installed at the lower end of the ventilation groove, and a limiting protrusion is provided on the inner wall of the ventilation groove at the upper end of the metal filter screen. Four sets of equidistant rubber support rods are fixedly installed on the lower surface of the pressure plate, with each set consisting of two rubber support rods. A sealing plate is fixedly installed at the lower end of each set of two rubber support rods, and a return spring is fixedly installed on the outer side of the rubber support rod at the upper end of the cooling pipe.

[0008] Preferably, a partition plate is fixedly installed between the inner cooling pipe and the cooling pipe, and a gas recovery pipe is fixedly installed on the outside of the cooling pipe, the gas recovery pipe being connected between the inner cooling pipe and the cooling pipe.

[0009] Preferably, a first butterfly valve is fixedly installed between the heating single tube and the transition tube, a rotating groove is fixedly installed on the left side surface of the first butterfly valve, the right end of the heating single tube is rotatably installed in the rotating groove, and a second butterfly valve is fixedly installed between the transition tube and the cooling tube.

[0010] Preferably, the rotating stirring mechanism includes a sealing cover slidably mounted on the outside of the cooling pipe, a stirring motor is fixedly mounted on the outer surface of the sealing cover, the output end of the stirring motor passes through the sealing cover, and a stirring blade is fixedly mounted on the outer surface of the output end of the stirring motor inside the cooling pipe. The outer end of the stirring blade is attached to the inner wall of the inner cooling pipe, and the stirring blade is spiral in shape.

[0011] Preferably, a drive rod is fixedly installed at the output end of the first rotating motor, a drive gear is fixedly installed on the outer surface of the drive rod, and a follower gear is fixedly installed on the left side of the heating tube, the follower gear meshing with the drive gear.

[0012] Preferably, an evacuation pipe is fixedly installed at the upper end of the transition pipe, a hydrogen pipe is fixedly installed at the upper end of the cooling pipe, and a turntable is rotatably installed at the right end of the lower surface of the rotating plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves precise control over the cooling process of molybdenum powder through the structure of the cooling pipe and inner cooling pipe, combined with a heat exchange mechanism. By adjusting the movement of the heat exchange mechanism, the cooling rate can be flexibly adjusted to ensure that the molybdenum powder maintains its ideal physical properties during cooling. The design of the heat exchange mechanism makes the heat exchange inside the cooling pipe more efficient. By moving the lifting frame and pressure plate up and down, the contact area between the cooling gas and the molybdenum powder can be increased, accelerating heat transfer and significantly shortening the cooling time, improving production efficiency, and achieving improved and controllable cooling effects while minimizing oxygen exposure. 2. The present invention incorporates a rotating stirring mechanism inside the cooling pipe, including a stirring motor and stirring blades. The outer end of the stirring blades is attached to the inner wall of the cooling inner pipe, which can effectively prevent molybdenum powder from agglomerating and ensure uniform particle size. This uniform particle distribution helps to improve the sintering performance of molybdenum powder and the quality of the final product. By precisely controlling the cooling process and uniform stirring, this design can produce high-quality molybdenum powder with higher purity and more uniform particle distribution. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a molybdenum powder reduction furnace with controllable cooling effect according to the present invention. Figure 2 This is a schematic diagram of another perspective of the structure of a molybdenum powder reduction furnace with controllable cooling effect according to the present invention; Figure 3 This is a cross-sectional view of a molybdenum powder reduction furnace with controllable cooling effect according to the present invention. Figure 4 This is a partial structural cross-sectional view of a molybdenum powder reduction furnace with controllable cooling effect according to the present invention. Figure 5 This is a schematic diagram of a single-tube heating structure for a molybdenum powder reduction furnace with controllable cooling effect according to the present invention. Figure 6 This is a schematic diagram of the heat exchange mechanism of a molybdenum powder reduction furnace with controllable cooling effect according to the present invention. Figure 7 This invention relates to a molybdenum powder reduction furnace with controllable cooling effect. Figure 6 Enlarged view of point A in the middle; Figure 8 This is a cross-sectional view of the cooling tube of a molybdenum powder reduction furnace with controllable cooling effect according to the present invention. Figure 9 This invention relates to a molybdenum powder reduction furnace with controllable cooling effect. Figure 8 Enlarged view of section B in the middle.

[0015] The components represented by each number in the attached diagram are listed below: 1. Base; 2. Controller; 3. Rotating plate; 4. First rotating motor; 5. Calcining furnace; 6. Heating tube; 7. Transition tube; 8. Cooling tube; 9. Sealing cover; 10. Stirring motor; 11. Drive rod; 12. Drive gear; 13. Follower gear; 14. First butterfly valve; 15. Second butterfly valve; 16. Evacuation pipe; 17. Rotary tank; 18. Hydrogen pipe; 19. Electric actuator; 20. Second rotating motor; 21. Limiting slide; 22. Toothed plate; 23. Connecting plate; 24. Cooling inner tube; 25. Collar; 26. Support seat; 27. Gas recovery pipe; 28. Divider plate; 29. ​​Connecting rotating plate; 30. Lifting frame; 31. Pressure plate; 32. Rubber support rod; 33. Return spring; 34. Sealing plate; 35. Limiting protrusion; 36. Metal filter screen; 37. Turntable; 38. Hydraulic pump; 39. Stirring blade; 40. Ventilation groove. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] This invention provides a technical solution: such as Figure 1 - Figure 9 The molybdenum powder reduction furnace shown includes a base 1. A controller 2 is fixedly installed on the left side of the base 1. A hydraulic pump 38 is rotatably installed on the upper part of the controller 2. A rotating plate 3 is rotatably installed on the upper part of the hydraulic pump 38. A first rotating motor 4 is fixedly installed on the left side of the upper part of the rotating plate 3. A calcining furnace 5 is fixedly installed on the right side of the first rotating motor 4 on the upper part of the rotating plate 3. Two support seats 26 are fixedly installed on the upper right side of the rotating plate 3. A transition pipe 7 and a cooling pipe 8 are respectively fixedly installed on the upper part of the two support seats 26. A heating element is rotatably installed inside the calcining furnace 5. A second rotating motor 20 is fixedly installed at the lower end of the outer surface of the heat pipe 6 and the cooling pipe 8. A cooling inner pipe 24 is fixedly installed inside the cooling pipe 8. A heat exchange mechanism is fixedly installed between the second rotating motor 20 and the outer surface of the cooling pipe 8. An electric push rod 19 is fixedly installed at the right end of the outer surface of the cooling pipe 8. A sealing cover 9 is fixedly installed at the output end of the electric push rod 19. A limiting slide 21 is fixedly installed at the lower end of the sealing cover 9. A rotating stirring mechanism is fixedly installed on the side of the sealing cover 9 near the cooling pipe 8. The electric push rod 19 drives the sealing cover 9 to move along the limiting slide 21 to seal the cooling pipe 8.

[0018] Base 1 serves as the supporting structure for the entire equipment, ensuring its stability during operation. Controller 2, installed on the left side of base 1, is the control center of the equipment. Controller 2 contains a hydraulic pump 38, which provides power to the moving parts of the equipment via a hydraulic system. Controller 2 also integrates an electrical control system to control the operation of components such as the first rotary motor 4, the second rotary motor 20, and the electric actuator 19, enabling automated operation of the equipment.

[0019] The rotating plate 3 is mounted on the upper end of the hydraulic pump 38 and rotates under the drive of the hydraulic pump 38. A first rotating motor 4 is mounted on the upper left side of the rotating plate 3, and its output end meshes with the follower gear 13 of the heating single tube 6 via a drive rod 11 and a drive gear 12. The function of the first rotating motor 4 is to drive the heating single tube 6 to rotate within the calcining furnace 5, ensuring more uniform heating of the molybdenum powder during the reduction process and improving the reduction effect.

[0020] like Figure 1 , Figure 2 , Figure 3 As shown, a drive rod 11 is fixedly installed at the output end of the first rotating motor 4, and a drive gear 12 is fixedly installed on the outer surface of the drive rod 11. A follower gear 13 is fixedly installed on the left side of the heating single tube 6, and the follower gear 13 meshes with the drive gear 12.

[0021] An evacuation pipe 16 is fixedly installed at the upper end of the transition pipe 7, a hydrogen pipe 18 is fixedly installed at the upper end of the cooling pipe 8, and a turntable 37 is rotatably installed at the right end of the lower surface of the rotating plate 3.

[0022] Transition pipe 7 and cooling pipe 8 are installed on both sides of calcining furnace 5, respectively, to connect calcining furnace 5 to the cooling system. An evacuation pipe 16 is installed at the upper end of transition pipe 7 to evacuate air from calcining furnace 5 during the reduction process, creating a reducing atmosphere. A hydrogen pipe 18 is installed at the upper end of cooling pipe 8 to introduce hydrogen gas as a cooling medium. An inner cooling pipe 24 is installed inside cooling pipe 8, and the inner cooling pipe 24 is separated from cooling pipe 8 by a partition plate 28, forming an independent cooling channel. A gas recovery pipe 27 is installed on the outside of cooling pipe 8 to recover the hydrogen gas used in the cooling process, achieving resource recycling.

[0023] The calcining furnace 5 is the core component of the molybdenum powder reduction reaction and is installed on the upper end of the rotating plate 3. Inside the calcining furnace 5 is a single heating tube 6, which provides heat through an electric heating element for the reduction reaction of the molybdenum powder. The rotation of the single heating tube 6 is driven by a first rotating motor 4, ensuring uniform heating of the molybdenum powder during the heating process and avoiding localized overheating or incomplete reduction.

[0024] like Figure 6 , Figure 7 , Figure 8 , Figure 9As shown, the heat exchange mechanism includes a second rotating motor 20 fixedly installed at the lower end of the cooling pipe 8. Two symmetrical collars 25 are fixedly installed on the outer surface of the cooling pipe 8. A toothed plate 22 is movably installed between the two collars 25. The output end of the second rotating motor 20 meshes with the toothed plate 22. A connecting plate 23 is movably installed on the outer surface of the cooling pipe 8 between the two collars 25. Three equidistant connecting rotating plates 29 are rotatably installed on the upper end of each of the two collars 25. A lifting frame 30 is rotatably installed on the upper end of every two far apart connecting rotating plates 29. A pressure plate 31 is fixedly installed between the two lifting frames 30. A ventilation groove 40 corresponding to the heat exchange mechanism is opened on the inner wall of the cooling inner pipe 24.

[0025] The heat exchange mechanism is a key component of the cooling system, installed on the outer surface of the cooling pipe 8. The heat exchange mechanism includes a second rotating motor 20, a collar 25, a toothed plate 22, a connecting plate 23, a connecting rotating plate 29, a lifting frame 30, a pressure plate 31, a rubber support rod 32, a sealing plate 34, and a return spring 33. The output end of the second rotating motor 20 meshes with the toothed plate 22, and the movement of the toothed plate 22 drives the connecting plate 23 and the connecting rotating plate 29 to move up and down. A lifting frame 30 is installed on the upper end of the connecting rotating plate 29, and a pressure plate 31 is fixedly installed between the lifting frames 30. A rubber support rod 32 is installed on the lower surface of the pressure plate 31, and a sealing plate 34 is installed at the lower end of the rubber support rod 32. A return spring 33 is fixedly installed on the outer side of the rubber support rod 32 on the outer surface of the pressure plate 31 to provide elastic support when the pressure plate 31 moves. The movement of the heat exchange mechanism controls the opening and closing of the ventilation slot 40, thereby regulating the gas flow within the cooling pipe 8 and achieving precise control of the cooling effect.

[0026] A metal filter screen 36 is fixedly installed at the lower end of the ventilation groove 40. A limiting protrusion 35 is provided on the ventilation groove 40 at the metal filter screen 36. Four sets of equidistant rubber support rods 32 are fixedly installed on the lower surface of the pressure plate 31. Each set consists of two rubber support rods 32. A sealing plate 34 is fixedly installed at the lower end of each set of two rubber support rods 32. A return spring 33 is sleeved on the part of each rubber support rod 32 between the sealing plate 34 and the inner wall of the cooling pipe 8.

[0027] A partition plate 28 is fixedly installed between the inner cooling pipe 24 and the cooling pipe 8. A gas recovery pipe 27 is fixedly installed on the outside of the cooling pipe 8, and the gas recovery pipe 27 connects the inner cooling pipe 24 and the cooling pipe 8.

[0028] An electric actuator 19 is installed on the right end of the outer surface of the cooling pipe 8, and a sealing cap 9 is fixedly installed on its output end. A rotating stirring mechanism is installed on the side of the sealing cap 9 near the cooling pipe 8. The function of the electric actuator 19 is to control the opening and closing of the sealing cap 9, thereby achieving the sealing and opening of the cooling pipe 8. The opening and closing of the sealing cap 9 is controlled by the controller 2 to ensure the sealing and safety of the cooling process.

[0029] A rotating stirring mechanism is installed on the outer surface of the sealing cover 9, including a stirring motor 10 and stirring blades 39. The output end of the stirring motor 10 passes through the sealing cover 9, and the stirring blades 39 are installed inside the cooling pipe 8 on the outer surface of its output end. The outer end of the stirring blades 39 is attached to the inner wall of the inner cooling pipe 24, and the stirring blades 39 are spiral-shaped. During the cooling process, the stirring motor 10 drives the stirring blades 39 to rotate, stirring the molybdenum powder in the cooling pipe 8 to ensure that the molybdenum powder is cooled evenly and to prevent local overheating or uneven cooling.

[0030] A first butterfly valve 14 is fixedly installed between the heating single tube 6 and the transition tube 7. A rotating groove 17 is fixedly installed on the left side surface of the first butterfly valve 14. The right end of the heating single tube 6 is rotatably installed in the rotating groove 17. A second butterfly valve 15 is fixedly installed between the transition tube 7 and the cooling tube 8.

[0031] The rotating stirring mechanism includes a sealing cover 9 that is slidably installed on the outside of the cooling pipe 8. A stirring motor 10 is fixedly installed on the outer surface of the sealing cover 9. The output end of the stirring motor 10 passes through the sealing cover 9, and a stirring blade 39 is fixedly installed inside the cooling pipe 8 on the outer surface of the output end of the stirring motor 10. The outer end of the stirring blade 39 is attached to the inner wall of the inner cooling pipe 24.

[0032] Working principle: Before starting the equipment, a comprehensive inspection of the molybdenum powder reduction furnace is required to ensure that all components (such as base 1, controller 2, hydraulic pump 38, rotating plate 3, first rotating motor 4, calcination furnace 5, heating single tube 6, transition tube 7, cooling tube 8, cooling inner tube 24, etc.) are firmly installed without any looseness or damage.

[0033] The hydraulic pump 38 is started by controller 2, and the position of the rotating plate 3 is adjusted to bring the calcining furnace 5 to a suitable working height. The valve of the hydrogen pipe 18 is opened to introduce hydrogen into the calcining furnace 5, providing a reducing atmosphere for the reduction of molybdenum powder. The molybdenum powder in the calcining furnace 5 is heated by the heating single pipe 6 to begin the reduction process of the molybdenum powder.

[0034] The calcined molybdenum powder is at a high temperature and requires cooling. Hydraulic pump 38 is used to transfer the molybdenum powder into cooling pipe 8 for cooling, preventing direct contact with air and oxidation. After cooling is complete, close the valve on hydrogen pipe 18 to stop the flow of hydrogen. Then, sequentially shut off the first rotating motor 4, the second rotating motor 20, and the stirring motor 10 via controller 2, stopping all moving parts. Finally, shut off the hydraulic pump 38 via controller 2, returning the rotating plate 3 to its initial position.

[0035] The staff first opened both the first butterfly valve 14 and the second butterfly valve 15 to connect the heating single tube 6, the transition tube 7, and the cooling tube 8. At this time, the sealing cover 9 on the outside of the cooling tube 8 was open. After the staff put molybdenum powder into it, they used the electric push rod 19 to drive the sealing cover 9 to close and achieve a one-way seal of the cooling tube 8. After the feeding was completed, the staff used the evacuation pipe 16 to remove the internal air from the heating single tube 6, the transition tube 7, and the cooling tube 8, thereby reducing the oxygen content inside the equipment.

[0036] After feeding is complete, both the first butterfly valve 14 and the second butterfly valve 15 are closed, ensuring that the gases inside the heating tube 6, the transition tube 7, and the cooling tube 8 are not interconnected, thus avoiding any impact on the reduction effect. The first rotating motor 4 is started via the controller 2, and its output drive rod 11 drives the drive gear 12 to rotate. This, in turn, meshes with the follower gear 13, causing the heating tube 6 to rotate inside the calcining furnace 5, ensuring uniform heating. After the molybdenum powder reduction is complete, cooling is required. At this time, the first butterfly valve 14 is opened, connecting the transition tube 7 to the heating tube 6. The reacted molybdenum powder is then moved up and down by the hydraulic pump 38 until it reaches the transition tube 7. The first butterfly valve 14 is then closed, and the second butterfly valve 15 is opened. One-way valves are installed inside the hydrogen pipe 18, the evacuation pipe 16, and the gas recovery pipe 27 to prevent external air from entering the equipment during gas intake and exhaust, which could cause mixing of internal and external gases and affect the normal operation of the equipment.

[0037] The second rotating motor 20 is started by the controller 2, and its output end meshes with the toothed plate 22, driving the toothed plate 22 to move. The movement of the toothed plate 22 causes the pressure plate 31 to move up and down through the connecting rotating plate 29 and the lifting frame 30. A rubber support rod 32 and a sealing plate 34 are fixed on the lower surface of the pressure plate 31. The opening and closing of the ventilation groove 40 is controlled by the extension and retraction of the rubber support rod 32 and the action of the return spring 33, thereby regulating the gas flow between the cooling inner tube 24 and the cooling tube 8 and controlling the cooling effect.

[0038] During the cooling process, the stirring motor 10 is started, with its output end passing through the sealing cover 9, driving the stirring blade 39 to rotate inside the cooling inner tube 24, stirring the gas in the cooling tube 8 to ensure uniform cooling. During the cooling process, the gas between the cooling tube 8 and the cooling inner tube 24 is recovered through the gas recovery pipe 27, realizing gas recycling, thereby improving the cooling effect and achieving controllable cooling effect while isolating oxygen as much as possible.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A molybdenum powder reduction furnace with controllable cooling effect, comprising a base (1), characterized in that: A controller (2) is fixedly installed on the left side of the base (1). A hydraulic pump (38) is rotatably installed on the upper part of the controller (2). A rotating plate (3) is rotatably installed on the upper part of the hydraulic pump (38). A first rotating motor (4) is fixedly installed on the left side of the upper part of the rotating plate (3). A calcining furnace (5) is fixedly installed on the upper part of the rotating plate (3) to the right of the first rotating motor (4). Two support seats (26) are fixedly installed on the upper right side of the rotating plate (3). A transition pipe (7) and a cooling pipe (8) are fixedly installed on the upper part of the two support seats (26), respectively. The calcining furnace (5) is rotated inside. A heating single tube (6) is installed. A second rotating motor (20) is fixedly installed at the lower end of the outer surface of the cooling tube (8). A cooling inner tube (24) is fixedly installed inside the cooling tube (8). A heat exchange mechanism is fixedly installed between the second rotating motor (20) and the outer surface of the cooling tube (8). An electric push rod (19) is fixedly installed at the right end of the outer surface of the cooling tube (8). A sealing cover (9) is fixedly installed at the output end of the electric push rod (19). A limit slide (21) is fixedly installed at the lower end of the sealing cover (9). A rotating stirring mechanism is fixedly installed on the side of the sealing cover (9) near the cooling tube (8).

2. The molybdenum powder reduction furnace with controllable cooling effect according to claim 1, characterized in that: The heat exchange mechanism includes a second rotating motor (20) fixedly installed at the lower end of the cooling pipe (8). Two symmetrical collars (25) are fixedly installed on the outer surface of the cooling pipe (8). A toothed plate (22) is movably installed between the two collars (25). The output end of the second rotating motor (20) meshes with the toothed plate (22). A connecting plate (23) is movably installed between the two collars (25) on the outer surface of the cooling pipe (8). Three equidistant connecting plates (29) are rotatably installed on the upper ends of the two collars (25). A lifting frame (30) is rotatably installed on the upper ends of every two far apart connecting plates (29). A pressure plate (31) is fixedly installed between the two lifting frames (30). A ventilation groove (40) corresponding to the heat exchange mechanism is opened on the inner wall of the cooling inner pipe (24).

3. A molybdenum powder reduction furnace with controllable cooling effect according to claim 2, characterized in that: A metal filter screen (36) is fixedly installed at the lower end of the ventilation groove (40). A limiting protrusion (35) is provided on the inner wall of the ventilation groove (40) at the upper end of the metal filter screen (36). Four sets of equidistant rubber support rods (32) are fixedly installed on the lower surface of the pressure plate (31). Each pair of rubber support rods (32) forms a group. A sealing plate (34) is fixedly installed at the lower end of each pair of rubber support rods (32). A return spring (33) is fixedly installed on the outer side of the rubber support rods (32) at the upper end of the cooling pipe (8).

4. A molybdenum powder reduction furnace with controllable cooling effect according to claim 3, characterized in that: A partition plate (28) is fixedly installed between the inner cooling pipe (24) and the cooling pipe (8), and a gas recovery pipe (27) is fixedly installed on the outside of the cooling pipe (8). The gas recovery pipe (27) is connected between the inner cooling pipe (24) and the cooling pipe (8).

5. A molybdenum powder reduction furnace with controllable cooling effect according to claim 1, characterized in that: A first butterfly valve (14) is fixedly installed between the heating single tube (6) and the transition tube (7). A rotating groove (17) is fixedly installed on the left side surface of the first butterfly valve (14). The right end of the heating single tube (6) is rotatably installed in the rotating groove (17). A second butterfly valve (15) is fixedly installed between the transition tube (7) and the cooling tube (8).

6. A molybdenum powder reduction furnace with controllable cooling effect according to claim 1, characterized in that: The rotating stirring mechanism includes a sealing cover (9) that is slidably installed on the outside of the cooling pipe (8). A stirring motor (10) is fixedly installed on the outer surface of the sealing cover (9). The output end of the stirring motor (10) passes through the sealing cover (9). A stirring blade (39) is fixedly installed inside the cooling pipe (8) on the outer surface of the output end of the stirring motor (10). The outer end of the stirring blade (39) is attached to the inner wall of the inner cooling pipe (24). The stirring blade (39) is spiral.

7. A molybdenum powder reduction furnace with controllable cooling effect according to claim 1, characterized in that: A drive rod (11) is fixedly installed at the output end of the first rotating motor (4), and a drive gear (12) is fixedly installed on the outer surface of the drive rod (11). A follower gear (13) is fixedly installed on the left side of the heating tube (6), and the follower gear (13) meshes with the drive gear (12).

8. A molybdenum powder reduction furnace with controllable cooling effect according to claim 1, characterized in that: An evacuation pipe (16) is fixedly installed at the upper end of the transition pipe (7), a hydrogen pipe (18) is fixedly installed at the upper end of the cooling pipe (8), and a turntable (37) is rotatably installed at the right end of the lower surface of the rotating plate (3).

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