Electric heating furnace for molybdenum material processing

Abstract

The invention discloses an electric heating furnace for molybdenum material processing, which relates to the technical field of molybdenum material hot processing equipment and is technically characterized by comprising a furnace body, refractory bricks are fixedly mounted on the periphery of the inner wall of the furnace body, a plurality of uniformly distributed electric heating wires are fixedly mounted on the refractory bricks at the top in the furnace body, and a rod-shaped molybdenum material placing structure is arranged in the furnace body. The rod-shaped molybdenum material containing structure comprises a sealing furnace door, a push-pull frame is fixedly installed on the inner side wall of the sealing furnace door, the top of the push-pull frame is in threaded connection with a rod-shaped molybdenum material containing frame through a bolt, the rod-shaped molybdenum material containing frame is matched with the push-pull frame, and a hemispherical cover is in threaded connection to the top of the push-pull frame through a bolt. Refractory mortar residues and slag chippings falling in the furnace are received through the hemispherical cover and guided to slide down, high-temperature softened molybdenum materials are prevented from being polluted, the annular groove and the through hole are matched with the inclined inert gas supplementing pipe to form an inert gas protection cover, the molybdenum materials are prevented from being oxidized, and stable limiting of the molybdenum materials with different lengths is achieved by means of the inner protrusions and the gaskets.

Description

Technical Field

[0001] This invention relates to the field of molybdenum heat treatment equipment, specifically to an electric heating furnace for molybdenum processing. Background Technology

[0002] Currently, the conventional vacuum molybdenum wire furnaces used for molybdenum processing in the industry generally use high-alumina and corundum refractory bricks for lining. For the joints of the refractory bricks at the furnace top and the vulnerable surfaces of the bricks, high-temperature refractory mortar is used to seal the gaps and protect the bricks, thus meeting the dual requirements of sealing and heat insulation under vacuum negative pressure heating conditions. The molybdenum material placement racks inside the furnace are all pull-out structures. These racks, combined with the pre-set slide rails inside the furnace and featuring a layered slotted limiting structure, facilitate loading and unloading operations and ensure the stability of the rod-shaped molybdenum material placement, making them the mainstream configuration in the industry. Rod-shaped molybdenum materials are the most widely used workpiece in molybdenum processing. These materials can be directly embedded into the layered slots of the pull-out racks, which not only suits the placement of the racks but also ensures uniform heating of the molybdenum rods. Therefore, this structure is widely used in core hot processing processes such as annealing and pre-forging heating of molybdenum rods.

[0003] However, existing pull-out molybdenum material placement racks all have unobstructed, open tops without any anti-fall protection design. During the long-term industrial production of rod-shaped molybdenum materials, the continuous high-temperature baking at thousands of degrees Celsius inside the furnace causes a significant difference in the thermal expansion coefficients of the refractory mortar and refractory bricks. This, combined with the alternating structural stress caused by repeated thermal expansion and contraction during processing start-ups and shutdowns, the pressure difference between the inside and outside of the furnace due to vacuum negative pressure, and the combined effects of variations in the construction precision of the refractory bricks and uneven refractory mortar application, makes the high-temperature refractory mortar on the furnace body highly susceptible to cracking, peeling, and even complete detachment. Refractory mortar shedding material accounts for the majority of all falling impurities in the furnace. Meanwhile, the refractory bricks on the furnace roof may experience edge loosening, localized chipping, or even interlayer peeling due to long-term stress fatigue and high-temperature aging. This results in slag debris falling as well, which constitutes a small portion of the falling material. The open structure of the material rack top allows these refractory mortar residues and slag debris to fall directly into the rack without any obstruction, coming into contact with the high-temperature softened rod-shaped molybdenum workpieces. This causes surface scratches, slag inclusions, and contamination from foreign components on the rod-shaped molybdenum workpieces, reducing the finished product qualification rate and surface precision of the processed rod-shaped molybdenum workpieces. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an electric heating furnace for molybdenum material processing, which can effectively solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an electric heating furnace for processing molybdenum materials, comprising a furnace body, wherein refractory bricks are fixedly installed on all four sides of the inner wall of the furnace body, and a plurality of evenly distributed electric heating wires are fixedly installed on the refractory bricks at the top of the furnace body, and a rod-shaped molybdenum material placement structure is provided inside the furnace body.

[0006] The rod-shaped molybdenum material placement structure includes a sealed furnace door, with a push-pull frame fixedly installed on the inner wall of the sealed furnace door. The top of the push-pull frame is connected to the rod-shaped molybdenum material placement rack via bolts and threads, and the rod-shaped molybdenum material placement rack is adapted to the push-pull frame. The rod-shaped molybdenum material placement rack includes a hemispherical cover, several annular grooves, several inner protrusions, several through holes, and a placement cavity. The hemispherical cover is connected to the top of the push-pull frame via bolts and threads. The annular grooves are formed on the outer arc surface of the hemispherical cover, the inner protrusions are set on the inner arc surface of the hemispherical cover, and the through holes are set on the top of the annular grooves. The annular grooves communicate with the placement cavity through the through holes.

[0007] Preferably, sealing bolts are provided at all four corners of the sealed furnace door, and the sealed furnace door is threadedly connected to the furnace body through the sealing bolts.

[0008] Preferably, the push-pull frame consists of two push-pull rods and a ring, with the push-pull rods symmetrically installed on both sides of the ring, and a leak-proof mesh fixedly installed on the inner surface of the ring.

[0009] Preferably, the annular groove, inner protrusion, and through hole are all uniformly distributed in a stepped manner on the corresponding surfaces of the hemispherical cover.

[0010] Preferably, a vacuum pipe is fixedly installed on one side of the furnace body, penetrating the furnace body and the refractory bricks, and a manual switch valve is fixedly installed at the outlet port of the vacuum pipe.

[0011] Preferably, an inclined inert gas supply pipe is fixedly installed on the other side of the furnace body, penetrating the furnace body and the refractory bricks, with the outlet end of the inclined inert gas supply pipe facing the hemispherical cover, and a one-way valve is fixedly installed on the inclined inert gas supply pipe.

[0012] Preferably, the top of the furnace body is provided with a pressure relief valve mounting cavity, a pressure relief pipe is fixedly installed inside the pressure relief valve mounting cavity, a pressure relief valve is fixedly installed on the pressure relief pipe, and an exhaust pipe is fixedly installed at the exhaust end of the pressure relief pipe.

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

[0014] 1. By setting up a hemispherical cover on the rod-shaped molybdenum material placement rack, the refractory mud residue and slag fragments falling from the furnace are received and guided by the curved surface to slide down to the bottom of the furnace cavity, avoiding contact between impurities and the high-temperature softened rod-shaped molybdenum material, and eliminating quality defects such as scratches, slag inclusions and foreign component contamination on the surface of the molybdenum material.

[0015] 2. By setting annular grooves and through holes on the rod-shaped molybdenum material placement rack, and coordinating the outlet direction of the inclined inert gas replenishment pipe, inert gas is guided smoothly into the placement chamber, forming a stable inert gas protective cover around the molybdenum material, isolating residual air, and preventing oxidation of the rod-shaped molybdenum material during high-temperature processing.

[0016] 3. The rod-shaped molybdenum material is placed by setting the inner protrusion on the rod-shaped molybdenum material placement rack. The inner protrusion with an appropriate diameter can be selected according to the length of the molybdenum material. With the addition of shims, the molybdenum material can be stably limited. Attached Figure Description

[0017] Figure 1 This is a complete structural schematic diagram of the present invention;

[0018] Figure 2 For the present invention Figure 1 Another perspective structural diagram;

[0019] Figure 3 For the present invention Figure 1 A schematic diagram of the cross-sectional structure;

[0020] Figure 4 This is a schematic diagram of the rod-shaped molybdenum material placement structure of the present invention;

[0021] Figure 5 For the present invention Figure 4 Another perspective structural diagram;

[0022] Figure 6 This is a schematic diagram of the structure of the rod-shaped molybdenum material placement rack of the present invention;

[0023] Figure 7 For the present invention Figure 6 A schematic diagram of the cross-sectional structure;

[0024] Figure 8 For the present invention Figure 7 A magnified structural diagram of point A above.

[0025] In the picture:

[0026] 1. Furnace body; 2. Refractory bricks; 3. Electric heating wire; 4. Rod-shaped molybdenum material placement structure; 41. Sealed furnace door; 42. Push-pull frame; 43. Rod-shaped molybdenum material placement rack; 431. Hemispherical cover; 432. Annular groove; 433. Inner protrusion; 434. Through hole; 435. Placement cavity; 5. Leak-proof mesh; 6. Vacuum tube; 7. Manual switch valve; 8. Inclined inert gas replenishment tube; 9. One-way valve; 10. Pressure relief valve mounting cavity; 11. Pressure relief pipe; 12. Pressure relief valve; 13. Exhaust pipe. Detailed Implementation

[0027] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0028] This invention provides a technical solution:

[0029] Please see Figures 1 to 8 An electric heating furnace for processing molybdenum materials includes a furnace body 1. Refractory bricks 2 are fixedly installed on all four sides of the inner wall of the furnace body 1. Several evenly distributed electric heating wires 3 are fixedly installed on the refractory bricks 2 at the top of the furnace body 1. A rod-shaped molybdenum material placement structure 4 is provided inside the furnace body 1.

[0030] The rod-shaped molybdenum material placement structure 4 includes a sealed furnace door 41, with sealing bolts at each of the four corners. The sealed furnace door 41 is threadedly connected to the furnace body 1 via the sealing bolts. A push-pull frame 42 is fixedly installed on the inner side wall of the sealed furnace door 41. A rod-shaped molybdenum material placement rack 43 is threadedly connected to the top of the push-pull frame 42 via bolts. The rod-shaped molybdenum material placement rack 43 is adapted to the push-pull frame 42. The rod-shaped molybdenum material placement rack 43 includes a hemispherical cover 431, several annular grooves 432, several inner protrusions 433, several through holes 434, and a placement cavity 435. The hemispherical cover 431 is threadedly connected to the top of the push-pull frame 42 via bolts. The annular grooves 432 are formed on the outer arc surface of the hemispherical cover 431. The inner protrusions 433 are set on the inner arc surface of the hemispherical cover 431. The through holes 434 are set on the top of the annular grooves 432. The annular grooves 432 communicate with the placement cavity 435 through the through holes 434.

[0031] The working process of the rod-shaped molybdenum material placement structure 4: Unscrew the sealing bolts at the four corners of the sealed furnace door 41, pull the sealed furnace door 41 to drive the push-pull bracket 42 to move the rod-shaped molybdenum material placement bracket 43 out (the rod-shaped molybdenum material placement bracket 43 can be made of molybdenum alloy). After removing the rod-shaped molybdenum material placement bracket 43, select the appropriate inner protrusion 433 according to the length of the molybdenum material to place the molybdenum material and install a gasket for limiting. Then, put the rod-shaped molybdenum material placement bracket 43 back into the push-pull bracket 42 and push it into the furnace body 1 to lock the sealed furnace door 41. During heating and processing, impurities falling into the furnace will fall on the outer arc surface of the hemispherical cover 431 and slide down the curved surface to the bottom of the furnace. Inert gas enters the placement chamber 43 through the annular groove 432 and the through hole 434. 5. Wrap the molybdenum material, and after processing, open the sealed furnace door 41 again to take out the molybdenum material. Its function is to ensure the airtightness of the furnace body 1 with the sealing bolts to meet the requirements of vacuum and inert gas conditions. The push-pull frame 42 realizes the convenient pull-out loading and unloading of the rod-shaped molybdenum material placement frame 43. The hemispherical cover 431 receives the fallen refractory mud residue and slag fragments to prevent them from contacting the high-temperature softened molybdenum material. The inner protrusion 433, together with the gasket, stabilizes and limits the rod-shaped molybdenum material to prevent displacement and falling off. The annular groove 432 and the through hole 434 guide the inert gas (argon can be used) to smoothly enter the placement cavity 435. The placement cavity 435 provides a stable placement space for the molybdenum material.

[0032] Please see Figure 4 and Figure 5 The push-pull bracket 42 consists of two push-pull rods and a ring. The push-pull rods are symmetrically installed on both sides of the ring, and a leak-proof net 5 is fixedly installed on the inner surface of the ring.

[0033] Pulling the sealed furnace door 41 can move the push-pull bracket 42 and the rod-shaped molybdenum material placement rack 43 connected to the top thread out or push into the furnace body 1 simultaneously. The two push-pull rods and the ring are adapted to the pull-out operation. The leak-proof mesh 5 on the inner surface of the ring will intercept the molybdenum material in time when it accidentally slides off the inner protrusion 433 of the rod-shaped molybdenum material placement rack 43.

[0034] In some embodiments, the annular groove 432, the inner protrusion 433, and the through hole 434 are all uniformly distributed in a stepped manner on the corresponding surfaces of the hemispherical cover 431.

[0035] In this embodiment, the working process of the annular groove 432, inner protrusion 433 and through hole 434 being uniformly distributed in a stepped manner on the corresponding surface of the hemispherical cover 431 is as follows: after the inert gas is sprayed onto the outer arc surface of the hemispherical cover 431 through the inclined inert gas replenishment pipe 8, it is guided along the stepped annular groove 432 and then uniformly enters the placement cavity 435 through the corresponding through hole 434. At the same time, the inner protrusion 433 of the corresponding stepped layer can be selected according to the length of the rod-shaped molybdenum material and a gasket can be added for limiting. Its function is that this distribution method can guide the flow of inert gas more smoothly in the annular groove 432, ensure uniform air intake in the through hole 434, and form a stable inert gas protective cover around the molybdenum material in the placement cavity 435. The stepped distribution of the inner protrusion 433 can be adapted to molybdenum materials of various lengths, realize the stable limiting of molybdenum materials of different specifications, and improve the uniformity and adaptability of the heating and processing of molybdenum materials.

[0036] Please see Figures 1-3 A vacuum pipe 6 is fixedly installed on one side of the furnace body 1, penetrating the furnace body 1 and the refractory brick 2. A manual switch valve 7 is fixedly installed at the outlet port of the vacuum pipe 6.

[0037] The working process of vacuum tube 6 and manual switch valve 7 is as follows: after sealing furnace door 41 and locking furnace body 1, open manual switch valve 7 to connect external vacuum equipment with vacuum tube 6 to extract air from the furnace. After evacuation, close manual switch valve 7 to maintain a vacuum environment. After molybdenum material processing is completed, open manual switch valve 7 again to restore the furnace to normal pressure. Its function is that vacuum tube 6 passes through furnace body 1 and refractory brick 2, providing a dedicated channel for air extraction from the furnace. Manual switch valve 7 precisely controls the opening and closing of this channel to ensure the establishment and stability of vacuum conditions in the furnace. This, combined with the subsequent inert gas filling process, prevents air from interfering with the high-temperature processing quality of molybdenum material.

[0038] Please see Figures 1 to 7 An inclined inert gas supply pipe 8 is fixedly installed on the other side of the furnace body 1, penetrating the furnace body 1 and the refractory brick 2. The outlet end of the inclined inert gas supply pipe 8 faces the hemispherical cover 431. A one-way valve 9 is fixedly installed on the inclined inert gas supply pipe 8.

[0039] The working process of the inclined inert gas supply pipe 8 and the one-way valve 9 is as follows: after the furnace body 1 is evacuated, external inert gas is transported through the inclined inert gas supply pipe 8, with its outlet facing the hemispherical cover 431. The gas is guided through the annular groove 432 and the through hole 434 into the placement chamber 435. The one-way valve 9 can prevent the backflow of gas in the furnace. During heating and processing, inert gas needs to be continuously supplied through this pipe to maintain a slightly positive pressure environment in the furnace. Its function is that the inclined inert gas supply pipe 8 provides a dedicated transport channel for inert gas. The inclined orientation matches the curved surface of the hemispherical cover 431 to improve the gas guiding effect. The one-way valve 9 prevents the backflow of air or gas in the furnace, ensuring that a stable inert gas protective cover is formed in the placement chamber 435, avoiding oxidation of the rod-shaped molybdenum material during high-temperature processing.

[0040] Please see Figures 1-3 The top of the furnace body 1 is provided with a pressure relief valve mounting cavity 10. A pressure relief pipe 11 is fixedly installed inside the pressure relief valve mounting cavity 10. A pressure relief valve 12 is fixedly installed on the pressure relief pipe 11. An exhaust pipe 13 is fixedly installed at the exhaust end of the pressure relief pipe 11.

[0041] When molybdenum materials are heated and processed, the gas inside the furnace expands due to high temperature. When the pressure exceeds the safety threshold, the pressure relief valve 12 automatically opens. The excess pressure inside the furnace is transmitted through the pressure relief pipe 11 and then quickly discharged through the exhaust pipe 13. After the pressure inside the furnace drops back to the safe range, the pressure relief valve 12 automatically closes. Its function is that the pressure relief valve installation cavity 10 provides a stable installation space for the pressure relief pipe 11 and the pressure relief valve 12. The pressure relief pipe 11 is a dedicated channel for the discharge of pressure inside the furnace. The pressure relief valve 12 accurately controls the timing of pressure discharge to maintain the stability of the internal pressure of the furnace body 1. The exhaust pipe 13 guides the flow of the discharged gas to avoid high-pressure gas spraying randomly and causing damage to equipment or personnel.

[0042] In practical use, the working principle of this invention is as follows:

[0043] When using the electric heating furnace for molybdenum material processing, first unscrew the sealing bolts at the four corners of the sealed furnace door 41, and pull the push-pull bracket 42 connected to the sealed furnace door 41 out of the furnace body 1 as a whole. Then, remove the bolts fixing the rod-shaped molybdenum material placement rack 43 to the push-pull bracket 42 so that the rod-shaped molybdenum material placement rack 43 can be operated separately. According to the length of the rod-shaped molybdenum material to be processed, select an inner protrusion 433 with a suitable diameter. The diameter of the inner protrusion 433 must be greater than the length of the rod-shaped molybdenum material. Then, put the rod-shaped molybdenum material into the placement cavity 435 and move it to the corresponding inner protrusion 433. Then, adjust the position of the molybdenum material laterally along the inner protrusion 433 so that both ends of the molybdenum material are firmly against the inner protrusion 433. In order to prevent the molybdenum material from shifting and falling off the inner protrusion 433 due to high temperature softening or the influence of airflow in the furnace during processing, a gasket can be installed at the contact end of the molybdenum material and the inner protrusion 433 to achieve reliable positioning.

[0044] After all the molybdenum materials to be processed are securely fastened to the corresponding inner protrusions 433, the hemispherical cover 431 is re-fixed to the push-pull frame 42 with bolts. At this time, the leak-proof mesh 5 inside the ring of the push-pull frame 42 can form a secondary protection. Even if the molybdenum material accidentally slips from the inner protrusions 433, it can be intercepted by the leak-proof mesh 5, preventing it from falling directly into the furnace body 1 and causing damage or contamination. Then, the rod-shaped molybdenum material placement rack 43 containing the molybdenum material is smoothly sent into the furnace body 1 through the push-pull frame 42. The sealed furnace door 41 is reset and locked to the furnace body 1 using the sealing bolts at the four corners (to improve the sealing effect, a sealing gasket can be added to the contact surface between the sealed furnace door 41 and the furnace body 1) to ensure the airtightness of the furnace body 1 and meet the working conditions requirements of subsequent vacuum treatment and inert gas protection.

[0045] Next, open the manual switch valve 7 on the vacuum pipe 6, connect the extraction end of the external vacuum equipment to the flange of the manual switch valve 7, and extract the air from inside the furnace body 1. After the air inside the furnace is completely extracted, close the manual switch valve 7, connect the output port of the external inert gas supply equipment to the inlet flange of the inclined inert gas replenishment pipe 8, and fill the furnace with inert gas to a slightly positive pressure state. To fully remove the residual air inside the furnace and prevent the molybdenum material from oxidizing during high-temperature processing, the gas replacement process of "vacuuming-filling with inert gas" needs to be repeated 2-3 times. During subsequent heating and processing, inert gas needs to be continuously replenished into the furnace through the inclined inert gas replenishment pipe 8, while controlling the replenishment flow rate to keep it small and stable. This ensures a uniform atmosphere inside the furnace and maintains a stable slightly positive pressure environment, effectively preventing outside air from seeping into the furnace.

[0046] Then, the electric heating wire 3, which is electrically connected to the external power distribution cabinet, is activated. After being energized, the electric heating wire 3 releases heat to heat the rod-shaped molybdenum material inside the furnace (to monitor the furnace temperature in real time and ensure precise control of the processing temperature, platinum-rhodium series thermocouples can be installed in the upper middle part of the inner wall of the refractory brick 2). Inert gas is ejected from the outlet end of the inclined inert gas supply pipe 8, and its outlet direction is towards the arc-shaped surface of the hemispherical cover 431. With the help of the curved flow guiding characteristics of the hemispherical cover 431, the inert gas can smoothly enter the placement chamber 435 through the through hole 434 on the annular groove 432, and evenly wrap around each molybdenum material to be processed; at the same time, the continuously introduced inert gas can form a stable inert gas protective cover in the placement chamber 435, preventing the trace amount of residual air in the furnace from contacting the molybdenum material, thus fundamentally avoiding high-temperature oxidation of the molybdenum material.

[0047] During the entire heating process, refractory clay residue and slag debris falling from the furnace will land directly on the outer arc surface of the hemispherical cover 431. Guided by the curved surface, these impurities will slide down to the bottom of the furnace body 1, preventing them from contacting the molybdenum material, which is in a softened state at high temperatures. This effectively eliminates quality defects such as scratches, slag inclusions, and contamination from foreign components on the surface of the molybdenum material, significantly improving the finished product qualification rate and surface precision of the processed molybdenum material. If the gas inside the furnace expands due to high temperature and the pressure exceeds the safety threshold, the pressure relief valve 12 in the pressure relief valve installation cavity 10 will automatically open. Excess pressure inside the furnace will be quickly discharged through the pressure relief pipe 11 and the exhaust pipe 13, ensuring that the furnace body 1 always operates within a safe pressure range. After the molybdenum material is processed, first turn off the electric heating wire 3 to stop heating, and at the same time stop the inert gas supply. Then open the manual switch valve 7 to restore the pressure inside the furnace to normal pressure. After that, unscrew the sealing bolts of the sealed furnace door 41, pull the sealed furnace door 41 to move the push-pull frame 42 and the rod-shaped molybdenum material placement frame 43 out of the furnace body 1 as a whole, and the processed molybdenum material can be taken out for subsequent shaping processing.

[0048] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. An electric heating furnace for processing molybdenum materials, comprising a furnace body (1), wherein refractory bricks (2) are fixedly installed on all four sides of the inner wall of the furnace body (1), and a plurality of evenly distributed electric heating wires (3) are fixedly installed on the refractory bricks (2) at the top of the furnace body (1), characterized in that: The furnace body (1) is equipped with a rod-shaped molybdenum material placement structure (4). The rod-shaped molybdenum material placement structure (4) includes a sealed furnace door (41), a push-pull frame (42) is fixedly installed on the inner side wall of the sealed furnace door (41), and a rod-shaped molybdenum material placement frame (43) is connected to the top of the push-pull frame (42) by bolts and threads. The rod-shaped molybdenum material placement frame (43) is adapted to the push-pull frame (42). The rod-shaped molybdenum material placement frame (43) includes a hemispherical cover (431), several annular grooves (432), several inner protrusions (433), and several... The through hole (434) and the placement cavity (435) are provided. The hemispherical cover (431) is connected to the top of the push-pull bracket (42) by bolt thread. The annular groove (432) is opened on the outer arc surface of the hemispherical cover (431). The inner protrusion (433) is provided on the inner arc surface of the hemispherical cover (431). The through hole (434) is provided on the top of the annular groove (432). The annular groove (432) is connected to the placement cavity (435) through the through hole (434).

2. The electric heating furnace for molybdenum material processing according to claim 1, characterized in that: Sealing bolts are provided at the four corners of the sealed furnace door (41), and the sealed furnace door (41) is threadedly connected to the furnace body (1) through the sealing bolts.

3. The electric heating furnace for molybdenum material processing according to claim 1, characterized in that: The push-pull frame (42) consists of two push-pull rods and a ring. The push-pull rods are symmetrically installed on both sides of the ring, and a leak-proof net (5) is fixedly installed on the inner surface of the ring.

4. The electric heating furnace for molybdenum material processing according to claim 1, characterized in that: The annular groove (432), inner protrusion (433), and through hole (434) are all uniformly distributed in a stepped manner on the corresponding surface of the hemispherical cover (431).

5. The electric heating furnace for molybdenum material processing according to claim 1, characterized in that: A vacuum pipe (6) is fixedly installed on one side of the furnace body (1) and the refractory brick (2), and a manual switch valve (7) is fixedly installed at the outlet port of the vacuum pipe (6).

6. The electric heating furnace for molybdenum material processing according to claim 1, characterized in that: An inclined inert gas supply pipe (8) is fixedly installed on the other side of the furnace body (1) and the refractory brick (2). The outlet end of the inclined inert gas supply pipe (8) faces the hemispherical cover (431). A one-way valve (9) is fixedly installed on the inclined inert gas supply pipe (8).

7. The electric heating furnace for molybdenum material processing according to claim 1, characterized in that: The top of the furnace body (1) is provided with a pressure relief valve mounting cavity (10), and a pressure relief pipe (11) is fixedly installed inside the pressure relief valve mounting cavity (10). A pressure relief valve (12) is fixedly installed on the pressure relief pipe (11), and an exhaust pipe (13) is fixedly installed at the exhaust end of the pressure relief pipe (11).

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