Low-oxygen-content vanadium-aluminum alloy smelting device

Abstract

The invention relates to the technical field of alloy smelting, in particular to a low-oxygen-content vanadium-aluminum alloy smelting device which comprises a heating furnace, a heat preservation sealing furnace cover at the top end of the heating furnace and a graphite crucible on the inner side of the heating furnace, and a plurality of vertically-arranged limiting columns are fixedly connected to the bottom end of a top ring of the graphite crucible. By arranging the feeding assembly, the vacuumizing assembly and the vacuum pump, during feeding, the vacuum pump is started, a negative pressure environment is formed in the heating furnace, then material particle powder is added to the inner side of the feeding tank, the heating box is started, air and water vapor in the feeding tank are discharged, and finally a first feeding valve is opened, so that feeding can be completed; through the design of the feeding assembly and the vacuumizing assembly, material particle powder can be in a dry low-oxygen vacuum state before entering the heating furnace, the material particle powder is prevented from reacting due to overlong contact time with air, the inner side of the heating furnace can be in a vacuum state through the arrangement of the vacuum pump, and it is guaranteed that the material reaction process is in a low-oxygen environment.

Description

Technical Field

[0001] The invention relates to the technical field of alloy smelting, in particular to a low-oxygen-content vanadium-aluminum alloy smelting device. Background Art

[0002] Vanadium aluminum alloy is a commonly used master alloy, mainly used as a master alloy for making titanium alloys, high-temperature titanium alloys and element additives for certain special-purpose titanium alloys. The vanadium aluminum alloy smelting device is an advanced equipment specially used to prepare high-quality vanadium aluminum alloys. It integrates a number of precision designs and technological innovations to achieve the smelting of vanadium aluminum alloys. This equipment can significantly improve the quality and performance of the alloy, and has extremely important application value in aerospace, high-end manufacturing and other fields with strict requirements on material quality, and has strongly promoted the research and development and production of high-performance vanadium aluminum alloy materials in related industries.

[0003] The existing vanadium-aluminum alloy smelting device is widely used, but when the existing device is smelting the material, it is not possible to effectively remove the water, oxygen and other substances that can react with the material contained in the material. These substances participate in the reaction during the smelting process of the material, which can easily lead to a decrease in the quality of the output. In addition, when the device is opened after the refining is completed, the high-temperature gas in the device escapes rapidly, which can easily cause harm to the operator. Therefore, in view of the above problems, a low-oxygen content vanadium-aluminum alloy smelting device is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a low-oxygen content vanadium aluminum alloy smelting device to solve the problems mentioned in the above background technology that the existing device cannot remove water and oxygen in the material and the high-temperature gas after the reaction of the device is easily scalded by the staff.

[0005] To achieve the above object, the present invention provides the following technical solutions: A low-oxygen-content vanadium-aluminum alloy smelting device comprises a heating furnace, a heat-insulating and sealed furnace cover at the top of the heating furnace and a graphite crucible inside the heating furnace, wherein a plurality of vertically arranged limit columns are fixedly connected to the bottom end of the top ring of the graphite crucible, a limit cylinder is provided on the outer side of the limit column, the limit column is inserted into the inner side of the limit cylinder, a baffle is provided on the top of the graphite crucible, a symmetrically arranged connecting plate is fixedly connected to the outer side of the heat-insulating and sealed furnace cover, a bottom plate is fixedly connected to the bottom end of the heating furnace, a symmetrically arranged electric telescopic rod is fixedly connected to the top of the bottom plate, the top end of the electric telescopic rod output shaft is fixedly connected to the bottom end of the connecting plate, a feeding assembly is installed on the top end of the heat-insulating and sealed furnace cover, and a control box is fixedly connected to the front side of the heating furnace.

[0006] Preferably, the feeding assembly includes a feeding pipe which is vertically arranged and fixedly connected to the inside of the baffle, a first feeding valve is fixedly connected to the top of the feeding pipe, a feeding tank is fixedly connected to the top of the first feeding valve, a second feeding valve is fixedly connected to the top of the feeding tank, a feeding funnel is fixedly connected to the top of the second feeding valve, a heating box is provided on the outside of the feeding tank, a plurality of pillars are fixedly connected to the bottom of the heating box, the pillars are fixedly connected to the top of the thermal insulation and sealing furnace cover, and a vacuum assembly is installed on the top of the feeding tank.

[0007] Preferably, the vacuum assembly includes a first vacuum valve fixedly connected to the top of the feeding tank, the end of the first vacuum valve away from the feeding tank is spirally connected with a threaded connector, and the end of the threaded connector away from the first vacuum valve is fixedly connected with a first vacuum tube.

[0008] Preferably, a vacuum pump fixedly connected to the top of the base plate is provided on the rear side of the heating furnace, the air inlet of the vacuum pump is fixedly connected to a vertically arranged main vacuum tube, the top of the main vacuum tube is fixedly connected to a horizontally arranged second vacuum tube, the end of the second vacuum tube away from the main vacuum tube is fixedly connected to a second vacuum valve, the end of the second vacuum valve away from the second vacuum tube is fixedly connected to a vacuum tube, the end of the first vacuum tube away from the threaded connector is fixedly connected to the top of the main vacuum tube, the vacuum tube is fixedly connected to the inside of the heating furnace and passes through the inner side of the heating furnace, and an air intake assembly is provided on one side of the vacuum pump.

[0009] Preferably, the air intake assembly includes a nitrogen tank fixedly connected to the top of the base plate, the nitrogen tank outlet is fixedly connected to a nitrogen connecting pipe, the end of the nitrogen connecting pipe away from the nitrogen tank is fixedly connected to an air intake valve, the end of the air intake valve away from the nitrogen connecting pipe is fixedly connected to a nitrogen air intake pipe, the nitrogen air intake pipe is fixedly connected to the inside of the heating furnace and passes through the inner side of the heating furnace, and an exhaust assembly is provided on one side of the air intake assembly.

[0010] Preferably, the exhaust assembly includes an exhaust pipe fixedly connected to the inside of the heating furnace and passing through the inner side of the heating furnace, one end of the exhaust pipe is fixedly connected to an exhaust valve located on the outside of the heating furnace, one end of the exhaust valve away from the exhaust pipe is fixedly connected to an exhaust connecting pipe, and a plurality of evenly distributed condensing fins are fixedly connected to the outside of the exhaust connecting pipe.

[0011] Preferably, the heating furnace, electric telescopic rod, heating box, vacuum pump and nitrogen tank are all electrically connected to the control box.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by setting a feeding component, a vacuum pump and a vacuum pump, when feeding, the vacuum pump is started to make the heating furnace present a negative pressure environment, then the material particles and powder are added to the inner side of the feeding tank, the heating box is started, the air and water vapor in the feeding tank are discharged, and finally the first feeding valve is opened to complete the feeding. The design of the feeding component and the vacuum pump component can make the material particles and powder be in a dry low-oxygen vacuum state before entering the heating furnace, so as to avoid the material particles and powder from reacting with the air for too long. The setting of the vacuum pump can make the inner side of the heating furnace present a vacuum state, so as to ensure that the material is in a low-oxygen environment during the reaction process; 2. In the present invention, by providing an electric telescopic rod, an air intake assembly and an exhaust assembly, when the material is smelted, the exhaust connecting pipe is placed in a cold water pool, the exhaust valve is opened, the nitrogen tank is started and the air intake valve is opened, the low-temperature nitrogen enters the inner side of the heating furnace, and the high-temperature gas is discharged through the exhaust pipe. Finally, the electric telescopic rod is started to raise the thermal insulation and sealed furnace cover so that the graphite crucible can be taken out for the next step of processing. The electric telescopic rod enables the operator to manually open the thermal insulation and sealed furnace cover without the need. The provision of the air intake assembly and the exhaust assembly can replace the high-temperature gas in the heating furnace to prevent the high-temperature gas from suddenly escaping when the thermal insulation and sealed furnace cover is opened, causing burns to the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall front structure of the present invention; Figure 2 It is a schematic diagram of the overall rear side structure of the present invention; Figure 3 It is a schematic diagram of the local structure of the present invention; Figure 4 It is a schematic diagram of the overall opening structure of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the structure at A; Figure 6 It is a schematic diagram of the structure of the feeding assembly of the present invention; Figure 7 The figure is a schematic diagram of the installation structure of the graphite crucible of the present invention.

[0014] In the figure: 1, heating furnace; 2, heat-insulating sealed furnace cover; 3, graphite crucible; 4, limiting column; 5, limiting cylinder; 6, baffle; 7, connecting plate; 8, bottom plate; 9, electric telescopic rod; 10, feeding assembly; 101, feeding pipe; 102, first feeding valve; 103, feeding tank; 104, second feeding valve; 105, feeding funnel; 106, heating box; 107, pillar; 108, vacuum assembly; 1081, first vacuum valve; 108 2. Threaded connector; 1083. First vacuum tube; 11. Vacuum pump; 12. Main vacuum tube; 13. Second vacuum tube; 14. Second vacuum valve; 15. Vacuum tube; 16. Intake assembly; 161. Nitrogen tank; 162. Nitrogen connecting pipe; 163. Intake valve; 164. Nitrogen inlet pipe; 17. Exhaust assembly; 171. Exhaust pipe; 172. Exhaust valve; 173. Exhaust connecting pipe; 174. Condensation fin; 18. Control box. DETAILED DESCRIPTION Example

[0015] See also Figure 1-7 , the present invention provides a technical solution: A low-oxygen-content vanadium-aluminum alloy smelting device comprises a heating furnace 1, a heat-insulating and sealed furnace cover 2 at the top of the heating furnace 1 and a graphite crucible 3 inside the heating furnace 1, a plurality of vertically arranged limit columns 4 are fixedly connected to the bottom end of the top ring of the graphite crucible 3, a limit tube 5 is arranged on the outside of the limit column 4, the limit column 4 is inserted into the inside of the limit tube 5, a baffle 6 is arranged on the top of the graphite crucible 3, a symmetrically arranged connecting plate 7 is fixedly connected to the outside of the heat-insulating and sealed furnace cover 2, a bottom plate 8 is fixedly connected to the bottom end of the heating furnace 1, a symmetrically arranged electric telescopic rod 9 is fixedly connected to the top of the bottom plate 8, the top end of the output shaft of the electric telescopic rod 9 is fixedly connected to the bottom end of the connecting plate 7, a feeding assembly 10 is installed on the top of the heat-insulating and sealed furnace cover 2, a control box 18 is fixedly connected to the front side of the heating furnace 1, and a feeding assembly 10 is installed on the top of the heat-insulating and sealed furnace cover 2. The component 10 includes a feeding pipe 101 which is vertically arranged and fixedly connected to the inside of the baffle 6, a first feeding valve 102 is fixedly connected to the top of the feeding pipe 101, a feeding tank 103 is fixedly connected to the top of the first feeding valve 102, a second feeding valve 104 is fixedly connected to the top of the feeding tank 103, a feeding funnel 105 is fixedly connected to the top of the second feeding valve 104, a heating box 106 is provided on the outside of the feeding tank 103, a plurality of pillars 107 are fixedly connected to the bottom of the heating box 106, the pillars 107 are fixedly connected to the top of the heat-insulating and sealing furnace cover 2, a vacuum assembly 108 is installed on the top of the feeding tank 103, the vacuum assembly 108 includes a first vacuum valve 1081 fixedly connected to the top of the feeding tank 103, and the first vacuum valve 1081 is away from the top of the feeding tank 103. One end of the feeding tank 103 is spirally connected with a threaded connector 1082, and the end of the threaded connector 1082 away from the first vacuum valve 1081 is fixedly connected with a first vacuum tube 1083. A vacuum pump 11 fixedly connected to the top of the bottom plate 8 is provided at the rear side of the heating furnace 1. The air inlet of the vacuum pump 11 is fixedly connected with a vertically arranged main vacuum tube 12, and the top of the main vacuum tube 12 is fixedly connected with a horizontally arranged second vacuum tube 13, and the end of the second vacuum tube 13 away from the main vacuum tube 12 is fixedly connected with a second vacuum valve 14, and the end of the second vacuum valve 14 away from the second vacuum tube 13 is fixedly connected with a vacuum pumping tube 15, and the end of the first vacuum tube 1083 away from the threaded connector 1082 is fixedly connected to the top of the main vacuum tube 12, and the vacuum pump 11 is fixedly connected to the top of the main vacuum tube 12. The tube 15 is fixedly connected to the inside of the heating furnace 1 and is connected to the inner side of the heating furnace 1. An air intake component 16 is provided on one side of the vacuum pump 11. When adding materials, the vacuum pump 11 is started to make the heating furnace 1 present a negative pressure environment. Subsequently, the material particles and powder are added to the inner side of the feeding tank 103, and the heating box 106 is started to discharge the air and water vapor in the feeding tank 103. Finally, the first feeding valve 102 is opened to complete the feeding. The design of the feeding component 10 and the vacuum component 108 can make the material particles and powder be in a dry low-oxygen vacuum state before entering the heating furnace 1, so as to avoid the material particles and powder from reacting due to prolonged contact with the air. The setting of the vacuum pump 11 can make the inner side of the heating furnace 1 present a vacuum state, so as to ensure a low-oxygen environment during the material reaction process.

[0016] The air intake assembly 16 includes a nitrogen tank 161 fixedly connected to the top of the bottom plate 8, the air outlet of the nitrogen tank 161 is fixedly connected to a nitrogen connecting pipe 162, the end of the nitrogen connecting pipe 162 away from the nitrogen tank 161 is fixedly connected to an air intake valve 163, the end of the air intake valve 163 away from the nitrogen connecting pipe 162 is fixedly connected to a nitrogen air intake pipe 164, the nitrogen air intake pipe 164 is fixedly connected to the inside of the heating furnace 1 and is connected to the inside of the heating furnace 1, an exhaust assembly 17 is provided on one side of the air intake assembly 16, the exhaust assembly 17 includes an exhaust pipe 171 fixedly connected to the inside of the heating furnace 1 and is connected to the inside of the heating furnace 1, one end of the exhaust pipe 171 is fixedly connected to an exhaust valve 172 located on the outside of the heating furnace 1, the end of the exhaust valve 172 away from the exhaust pipe 171 is fixedly connected to an exhaust connecting pipe 173, and the outside of the exhaust connecting pipe 173 is fixedly connected to a plurality of uniformly distributed condensing The fin 174, the heating furnace 1, the electric telescopic rod 9, the heating box 106, the vacuum pump 11 and the nitrogen tank 161 are all electrically connected to the control box 18. Through the electric telescopic rod 9, the air intake assembly 16 and the exhaust assembly 17, when the material smelting is completed, the exhaust connecting pipe 173 is placed in the cold water pool, the exhaust valve 172 is opened, the nitrogen tank 161 is started and the air intake valve 163 is opened, the low-temperature nitrogen enters the inner side of the heating furnace 1, and the high-temperature gas is discharged through the exhaust pipe 171. Finally, the electric telescopic rod 9 is started to make the thermal insulation and sealed furnace cover 2 rise, so that the graphite crucible 3 can be taken out for the next step of processing. The electric telescopic rod 9 enables the operator to open the thermal insulation and sealed furnace cover 2 manually without the need for manual operation. The setting of the air intake assembly 16 and the exhaust assembly 17 can replace the high-temperature gas in the heating furnace 1 to prevent the high-temperature gas from suddenly escaping when the thermal insulation and sealed furnace cover 2 is opened, causing burns to the operator.

[0017] Workflow: Power on the equipment before use. When the material needs to be melted, first clean the graphite crucible 3, put the graphite crucible 3 into the inner side of the heating furnace 1 at the top of the bottom plate 8, and insert the limit column 4 into the inner side of the limit tube 5. Then start the electric telescopic rod 9 at the bottom end of the connecting plate 7 through the control box 18. The output shaft of the electric telescopic rod 9 retracts to drive the connecting plate 7 and the heat-insulating and sealed furnace cover 2 to descend until the bottom end of the heat-insulating and sealed furnace cover 2 is tightly fitted with the top of the heating furnace 1. At this time, the baffle 6 moves to the top of the graphite crucible 3. The setting of the limit column 4 and the limit tube 5 can limit the graphite crucible 3 to make it more stable. The baffle 6 can prevent the material from splashing around during the melting process, causing the material to enter the heating furnace 1. The next step is to place one end of the first vacuum tube 1083 The threaded connector 1082 is screwed on one end of the first vacuum valve 1081, the first vacuum valve 1081 is closed and the second vacuum valve 14 is opened, and the vacuum pump 11 is started. At this time, the air inside the heating furnace 1 is discharged through the vacuum pipe 15, the second vacuum valve 14, the second vacuum pipe 13, the main vacuum pipe 12 and the vacuum pump 11, and the heating furnace 1 presents a negative pressure environment. Subsequently, the second feeding valve 104 is opened, the sealed packaged material particles and powder are opened, and the material particles and powder are added to the inside of the feeding tank 103 through the feeding funnel 105. The second feeding valve 104 and the second vacuum valve 14 are closed and the first vacuum valve 1081 is opened, and the heating box 106 at the top of the support 107 is started. The heating box 106 heats the feeding tank 103 to remove the material particles and powder. The doped water vapor evaporates, and the vacuum pump 11 keeps working to discharge the air and water vapor in the feeding tank 103 through the first vacuum valve 1081, the first vacuum tube 1083, the main vacuum tube 12 and the vacuum pump 11. At this time, the pressure in the feeding tank 103 is almost the same as the pressure inside the heating furnace 1. The first feeding valve 102 is opened. Due to the effect of gravity, the material particle powder in the feeding tank 103 enters the inside of the crucible through the first feeding valve 102 and the feeding tube 101. Then, the first feeding valve 102 is closed to complete the feeding of the material particle powder under the vacuum environment. After the feeding is completed, the threaded connector 1082 is removed. The design of the feeding component 10 and the vacuum component 108 can make the material particle powder in a dry and low-oxygen state before entering the heating furnace 1. Vacuum state, to prevent the material particles and powder from reacting with the air for too long. The setting of the vacuum pump 11 can make the inside of the heating furnace 1 present a vacuum state, to ensure that the material is in a low oxygen environment during the reaction process. The next step is to heat and melt the material. First, nitrogen is introduced into the heating furnace 1, the nitrogen tank 161 is started and the air inlet valve 163 is opened. The nitrogen in the nitrogen tank 161 enters the inside of the heating furnace 1 through the nitrogen connecting pipe 162, the air inlet valve 163 and the nitrogen air inlet pipe 164. After the nitrogen ventilation is turned off, the nitrogen tank 161 and the air inlet valve 163 are closed. The introduction of nitrogen forms a stable gas environment inside the heating furnace 1, thereby ensuring the smooth progress of the reaction. When the material is melted, the exhaust connecting pipe 173 is placed in a cold water pool, and the exhaust valve 172 is opened.The high-temperature gas in the heating furnace 1 enters the cold water through the exhaust pipe 171, the exhaust valve 172 and the exhaust connecting pipe 173. The condensing fins 174 can initially dissipate the heat of the exhaust connecting pipe 173 to prevent it from being overheated and damaged. At this time, the nitrogen tank 161 is started and the air inlet valve 163 is opened. The low-temperature nitrogen enters the inner side of the heating furnace 1, and the high-temperature gas is discharged through the exhaust pipe 171. Finally, the electric telescopic rod 9 is started to raise the heat-insulating and sealed furnace cover 2 to take out the graphite crucible 3 for the next step of processing. The settings of the air inlet assembly 16 and the exhaust assembly 17 can replace the high-temperature gas in the heating furnace 1 to prevent the high-temperature gas from suddenly escaping when the heat-insulating and sealed furnace cover 2 is opened, causing burns to the operator.

[0018] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A low-oxygen-content vanadium-aluminum alloy smelting device, comprising a heating furnace (1), a heat-insulating sealed furnace cover (2) at the top of the heating furnace (1), and a graphite crucible (3) inside the heating furnace (1), characterized in that: The bottom end of the top ring of the graphite crucible (3) is fixedly connected to a plurality of vertically arranged limit columns (4), the outer side of the limit columns (4) is provided with a limit cylinder (5), and the limit columns (4) are inserted into the inner side of the limit cylinder (5). The top end of the graphite crucible (3) is provided with a baffle (6), the outer side of the heat-insulating and sealed furnace cover (2) is fixedly connected to a symmetrically arranged connecting plate (7), the bottom end of the heating furnace (1) is fixedly connected to a bottom plate (8), the top end of the bottom plate (8) is fixedly connected to a symmetrically arranged electric telescopic rod (9), the top end of the output shaft of the electric telescopic rod (9) is fixedly connected to the bottom end of the connecting plate (7), the top end of the heat-insulating and sealed furnace cover (2) is installed with a feeding assembly (10), and the front side of the heating furnace (1) is fixedly connected to a control box (18).

2. A low-oxygen-content vanadium-aluminum alloy smelting device according to claim 1, characterized in that: The feeding assembly (10) comprises a feeding pipe (101) arranged vertically and fixedly connected to the inside of the baffle (6); a first feeding valve (102) is fixedly connected to the top of the feeding pipe (101); a feeding tank (103) is fixedly connected to the top of the first feeding valve (102); a second feeding valve (104) is fixedly connected to the top of the feeding tank (103); a feeding funnel (105) is fixedly connected to the top of the second feeding valve (104); a heating box (106) is provided outside the feeding tank (103); a plurality of pillars (107) are fixedly connected to the bottom of the heating box (106); the pillars (107) are fixedly connected to the top of the heat-insulating and sealed furnace cover (2); and a vacuum assembly (108) is installed on the top of the feeding tank (103).

3. A low-oxygen-content vanadium-aluminum alloy smelting device according to claim 2, characterized in that: The vacuum pumping assembly (108) comprises a first vacuum valve (1081) fixedly connected to the top of the feeding tank (103); an end of the first vacuum valve (1081) away from the feeding tank (103) is spirally connected to a threaded connector (1082); and an end of the threaded connector (1082) away from the first vacuum valve (1081) is fixedly connected to a first vacuum tube (1083).

4. A low-oxygen-content vanadium-aluminum alloy smelting device according to claim 3, characterized in that: A vacuum pump (11) fixedly connected to the top of the bottom plate (8) is provided at the rear side of the heating furnace (1); an air inlet of the vacuum pump (11) is fixedly connected to a vertically arranged main vacuum tube (12); a horizontally arranged second vacuum tube (13) is fixedly connected to the top of the main vacuum tube (12); an end of the second vacuum tube (13) away from the main vacuum tube (12) is fixedly connected to a second vacuum valve (14); an end of the second vacuum valve (14) away from the second vacuum tube (13) is fixedly connected to a vacuum pumping tube (15); an end of the first vacuum tube (1083) away from the threaded connector (1082) is fixedly connected to the top of the main vacuum tube (12); the vacuum pumping tube (15) is fixedly connected to the inside of the heating furnace (1) and is communicated with the inside of the heating furnace (1); an air inlet assembly (16) is provided on one side of the vacuum pump (11).

5. A low-oxygen-content vanadium-aluminum alloy smelting device according to claim 4, characterized in that: The air intake assembly (16) comprises a nitrogen tank (161) fixedly connected to the top of the bottom plate (8); a nitrogen connecting pipe (162) is fixedly connected to the air outlet of the nitrogen tank (161); an end of the nitrogen connecting pipe (162) away from the nitrogen tank (161) is fixedly connected to an air intake valve (163); an end of the air intake valve (163) away from the nitrogen connecting pipe (162) is fixedly connected to a nitrogen air intake pipe (164); the nitrogen air intake pipe (164) is fixedly connected to the inside of the heating furnace (1) and is communicated with the inside of the heating furnace (1); an exhaust assembly (17) is provided on one side of the air intake assembly (16).

6. A low-oxygen-content vanadium-aluminum alloy smelting device according to claim 5, characterized in that: The exhaust assembly (17) comprises an exhaust pipe (171) fixedly connected to the interior of the heating furnace (1) and communicating with the inner side of the heating furnace (1); one end of the exhaust pipe (171) is fixedly connected to an exhaust valve (172) located outside the heating furnace (1); one end of the exhaust valve (172) away from the exhaust pipe (171) is fixedly connected to an exhaust connecting pipe (173); and a plurality of evenly distributed condensing fins (174) are fixedly connected to the outer side of the exhaust connecting pipe (173).

7. A low-oxygen-content vanadium-aluminum alloy smelting device according to claim 5, characterized in that: The heating furnace (1), the electric telescopic rod (9), the heating box (106), the vacuum pump (11) and the nitrogen tank (161) are all electrically connected to the control box (18).

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