A degassing device for aluminum water processing in a reverberatory furnace

Abstract

The application discloses a degassing device for aluminum water processing in a reflection furnace, and relates to the technical field of degassing devices. The degassing device comprises a moving part, a gas storage tank arranged on the moving part, a transmission pipe arranged on the gas storage tank, a control valve arranged on the gas storage tank and used for controlling gas to enter the transmission pipe, and the transmission pipe extends into a reaction furnace. A shunt pipe is arranged on a side of the transmission pipe away from the gas storage tank and is connected to the transmission pipe. A plurality of jet heads are arranged on the shunt pipe at intervals and are connected to the shunt pipe. The degassing device can improve the hydrogen removal effect in aluminum liquid.

Description

Technical Field

[0001] This application relates to the technical field of degassing devices, and in particular to a degassing device for aluminum molten metal processing in a reverberatory furnace. Background Technology

[0002] Reverberating furnaces, as key equipment for the melting and holding of aluminum and aluminum alloys, are widely used in the non-ferrous metals processing industry. Existing reverberating furnaces for aluminum processing typically employ a fixed furnace structure, with heat supplied by a burner on one side to melt the molten aluminum and maintain it within a certain temperature range to meet the requirements of subsequent casting or processing. These reverberating furnaces typically have a furnace chamber width of two to three meters to achieve a large processing capacity, making them the mainstream equipment for current aluminum melting and temporary storage.

[0003] During the smelting and holding of molten aluminum, liquid aluminum readily reacts with water vapor in the furnace atmosphere, absorbing hydrogen atoms and dissolving them into the molten aluminum. When molten aluminum containing excess hydrogen solidifies during casting, the solubility of hydrogen in solid aluminum is much lower than in liquid aluminum, causing supersaturated hydrogen to precipitate and form micropores. These pores (often manifesting as pinhole defects) significantly reduce the mechanical properties, density, and surface quality of aluminum castings during subsequent processing, severely impacting the strength, toughness, and corrosion resistance of the final product. This is one of the key issues restricting the improvement of aluminum processed product quality.

[0004] Currently, in reverberatory furnace scenarios, the commonly used degassing process involves an operator holding a metal tube with one end immersed in molten aluminum and blowing inert gases such as nitrogen or argon into the molten aluminum. This single-tube blowing method has significant limitations: First, its blowing coverage is extremely limited, with a single tube diameter typically only 1-1.5 cm, resulting in a small bubble-generating area that cannot effectively cover the vast furnace area of ​​two to three meters wide, leaving numerous dead zones for degassing. Second, because hydrogen atoms in molten aluminum are constantly flowing and diffusing, after single-point degassing, the surrounding high-hydrogen-concentration molten aluminum quickly replenishes the hydrogen, leading to incomplete and inefficient degassing. Although there is an advanced technology of bottom blowing using permeable bricks at the furnace bottom, which can achieve large-area and uniform degassing, this solution is expensive and usually requires the use of a dedicated holding furnace, making it unsuitable for integrated reverberatory furnaces that combine melting and degassing functions, thus greatly limiting its application scenarios. Summary of the Invention

[0005] In order to improve the removal efficiency of hydrogen from molten aluminum, this application provides a degassing device for aluminum molten metal processing in a reverberatory furnace.

[0006] This application provides a degassing device for aluminum molten metal processing in a reverberatory furnace, which adopts the following technical solution: A degassing device for aluminum molten metal processing in a reverberatory furnace includes a moving part; A gas storage tank is mounted on the movable part; A transmission pipe is installed in the gas storage tank, and the gas storage tank is equipped with a control valve to control the gas entering the transmission pipe. The transmission pipe extends into the reactor. A diversion pipe is located on the side of the transmission pipe away from the gas storage tank and is connected to it; Multiple jet heads are spaced apart on the splitter pipe, and the jet heads are connected to the splitter pipe.

[0007] By adopting the above technical solution, the device can be moved to different positions in the reverberatory furnace. The gas storage tank can store the gas used for degassing and control the gas to enter the transmission pipe through the control valve. The transmission pipe transmits the gas to the distribution pipe, and the distribution pipe distributes the gas to multiple spaced jet heads, thereby achieving degassing of the molten aluminum in the reverberatory furnace over a wider range, reducing degassing dead zones, and improving the efficiency and effect of hydrogen removal.

[0008] Optionally, the moving part is provided with a dosing device, and the dosing device is connected to a delivery pipe, which passes through the transmission pipe and the diversion pipe in sequence; Multiple spray pipes are provided on the side of the delivery pipe away from the dosing device, and each spray pipe corresponds to and is adjacent to the air jet head.

[0009] By adopting the above technical solution, the degassing device is movable, the gas storage tank can store gas and transmit it through the transmission pipe, the distribution pipe connected to the transmission pipe and multiple jet heads can spray gas outward for degassing, and at the same time the dosing device can dosing near the jet heads through the delivery pipe and spray pipe, so that the agent can play a role while spraying gas for degassing, thereby enhancing the degassing effect.

[0010] Optionally, the transmission tube includes an inner tube and an outer tube; The outer tube is sleeved outside the inner tube, and the inner tube and the outer tube are rotatably connected. The outer tube is connected to the gas storage tank, and the inner tube is connected to the diversion pipe. The outer wall of the outer tube is provided with an installation block, and the installation block has an installation groove that communicates with the outer tube; The mounting block is rotatably connected to a rotating shaft located in the mounting groove. Multiple power blades are evenly spaced along the circumferential side of the rotating shaft, and the power blades near the outer tube extend into the outer tube. The transmission tube is equipped with a transmission component, and when the rotating shaft rotates, the transmission component drives the inner tube to rotate.

[0011] By adopting the above technical solution, the transmission pipe adopts a structure in which the inner and outer pipes are nested and rotatably connected. When the gas storage tank supplies gas to the transmission pipe, the gas drives the power blade to rotate the rotating shaft. Then, the inner pipe is driven to rotate through the transmission component, which can make the diversion pipe and the jet head rotate, expand the jet coverage, reduce the dead zone of gas removal, and improve the hydrogen removal effect and efficiency.

[0012] Optionally, the transmission assembly includes a transmission helical gear, a connecting helical gear, a transmission gear, and a transmission chain; The connecting helical gear is disposed on the outer wall of the inner tube, and a connecting shaft is rotatably connected to the outer wall of the outer tube. The transmission helical gear is disposed on the outer circumference of the connecting shaft, and the transmission helical gear meshes with the connecting helical gear. The transmission gears are multiple and are respectively disposed on the outer periphery of the rotating shaft and the outer periphery of the connecting shaft. The transmission chain is sleeved on the outer periphery of the transmission gears and meshes with them.

[0013] By adopting the above technical solution, the gas in the gas storage tank enters the outer tube and drives the power blade to rotate the rotating shaft. The transmission component uses the meshing of the transmission helical gear and the connecting helical gear, and the meshing of the transmission gear and the transmission chain to transmit the rotation of the rotating shaft to the inner tube, so that the inner tube rotates relative to the outer tube, thereby driving the diversion pipe and the jet head to rotate, expanding the jet coverage range of the jet head in the reverberatory furnace, and improving the degassing effect and efficiency.

[0014] Optionally, the jet head includes a nozzle, a first nozzle, and a second nozzle; The first nozzle is connected to the splitter pipe, and the second nozzle is disposed inside the first nozzle. The outer peripheral sidewall of the second nozzle is slidably connected to the inner peripheral sidewall of the first nozzle. The nozzle is located on the side of the second nozzle away from the splitter pipe. The splitter pipe is equipped with a drive assembly. When the inner pipe rotates, the drive assembly drives the second nozzle to slide up and down reciprocally.

[0015] By adopting the above technical solution, the jet head of the degassing device includes a first nozzle and a second nozzle that can be slidably connected up and down, as well as a nozzle. When the inner tube rotates, the drive component can drive the second nozzle to slide up and down reciprocally, so that the jet head has a larger jet range, can more effectively cover the furnace area, reduce degassing dead zones, and improve hydrogen removal effect and efficiency.

[0016] Optionally, the drive assembly includes a reciprocating lead screw, a drive bar, a first drive gear, a second drive gear, a drive chain, a drive shaft, a drive gear, and a drive gear ring; The reciprocating screw is rotatably connected to the inner wall of the splitter pipe. The reciprocating screw extends into the first nozzle and corresponds to it one by one. The drive bar is disposed in the second nozzle. The drive bar and the reciprocating screw are threadedly connected. The first nozzle is provided with a limiting member to restrict the rotation of the second nozzle. The first drive gear is disposed on the outer periphery of the reciprocating lead screw, and the drive chain is sleeved on the outer periphery of the first drive gear and meshes with it; The power shaft is rotatably connected to the split pipe and extends into the inner pipe. The second drive gear is disposed at the end of the power shaft and meshes with the drive chain. The power gear ring is disposed on the inner wall of the outer tube, and the power gear is disposed on the power shaft, and the power gear meshes with the power gear ring.

[0017] By adopting the above technical solution, the second nozzle is made to slide up and down inside the first nozzle using the drive component, which drives the nozzle to move up and down, expanding the spray range of the nozzle. This can more effectively cover the wide furnace area of ​​the reverberatory furnace, reduce degassing dead zones, and improve degassing effect and efficiency. Combined with the movable moving part, gas storage tank supply, gas transmission pipe, flow diversion pipe, and multiple nozzles spaced apart, a more comprehensive and efficient degassing of the molten aluminum in the reverberatory furnace can be achieved.

[0018] Optionally, the limiting element is a limiting block, which is disposed on the outer wall of the second nozzle, and a limiting groove is provided on the inner wall of the first nozzle for the limiting block to slide up and down.

[0019] By adopting the above technical solution, a limiting block is set on the outer wall of the second nozzle, and a limiting groove is opened on the inner wall of the first nozzle for the limiting block to slide up and down. This can limit the rotation of the second nozzle, allowing the second nozzle to slide up and down inside the first nozzle. In conjunction with the drive assembly, the second nozzle can slide up and down reciprocally, which helps the jet head to better expel gas from the molten aluminum.

[0020] Optionally, the drive bar includes a first body and a second body; The first strip is positioned opposite to the second nozzle at one end near the splitter pipe, the second strip is connected to the first strip, and the first strip is threadedly connected to the reciprocating lead screw.

[0021] By adopting the above technical solution, the first strip and the second strip are located outside the second nozzle, reducing the possibility that the drive strip may affect the gas ejection effect of the second nozzle.

[0022] In summary, this application includes at least one of the following beneficial effects: 1. Multiple spaced jet nozzles can expand the blowing coverage area, effectively covering the furnace body area and reducing degassing dead zones; 2. The inner tube rotates relative to the outer tube, which in turn drives the diversion pipe and the jet head to rotate, expanding the jet coverage area of ​​the jet head in the reverberatory furnace and improving the degassing effect and efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application; Figure 2This is a schematic diagram of the external structure of Embodiment 2 of this application; Figure 3 This is a schematic diagram of the internal structure of Embodiment 2 of this application; Figure 4 This is a schematic diagram of the external structure of Embodiment 3 of this application; Figure 5 This is a schematic diagram of the internal structure of Embodiment 3 of this application; Figure 6 yes Figure 4 Enlarged schematic diagram of part A; Figure 7 yes Figure 5 Enlarged schematic diagram of part B; Figure 8 This is a schematic diagram of the internal structure of the shunt tube and the transmission tube in Embodiment 3 of this application.

[0024] Reference numerals: 1. Moving part; 11. Dosing device; 12. Delivery pipe; 13. Spraying pipe; 2. Gas tank; 21. Control valve; 3. Transmission pipe; 31. Inner pipe; 32. Outer pipe; 321. Connecting shaft; 4. Diverter pipe; 5. Jet nozzle; 51. Nozzle; 52. First nozzle; 521. Restriction groove; 53. Second nozzle; 531. Restriction block; 6. Mounting block; 61. Mounting groove; 62. Rotating shaft; 63. Power blade; 7. Transmission assembly; 71. Transmission helical gear; 72. Connecting helical gear; 73. Transmission gear; 74. Transmission chain; 8. Reciprocating screw; 81. Drive bar; 811. First bar body; 812. Second bar body; 82. First drive gear; 83. Second drive gear; 84. Drive chain; 85. Power shaft; 86. Power gear; 87. Power gear ring. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0026] This application discloses a degassing device for aluminum molten metal processing in a reverberatory furnace.

[0027] This application mainly adopts a mobile degassing device to spray gas at multiple locations in the molten aluminum, which achieves the effects of expanding the degassing coverage, improving degassing efficiency and effect. The following is a further detailed description of this application.

[0028] Example 1 See Figure 1The degassing device for aluminum molten metal processing in a reverberatory furnace provided in this application includes a moving part 1, a gas storage tank 2, a transmission pipe 3, a diversion pipe 4, and jet nozzles 5. The gas storage tank 2 is mounted and fixed on the moving part 1. The transmission pipe 3 is connected to and fixed to the gas storage tank 2. A control valve 21 for controlling gas entry into the transmission pipe 3 is mounted and fixed on the gas storage tank 2. The transmission pipe 3 extends into the reactor. The diversion pipe 4 is located on the side of the transmission pipe 3 away from the gas storage tank 2 and is connected to it. Multiple jet nozzles 5 are spaced apart on the diversion pipe 4 and connected to it, achieving the beneficial effects of movable, multi-position jet degassing of the molten aluminum, expanding the degassing range, and improving degassing efficiency and effect. This is because the moving part 1 can drive the entire device to move, allowing the jet nozzles 5 to spray gas at different positions within the furnace. The arrangement of multiple jet nozzles 5 also increases the spray coverage area and reduces dead zones in hydrogen removal.

[0029] Specifically, the moving part 1 can be a base with wheels or a track-based moving platform. If a base with wheels is used, the wheels can be directional wheels to easily maintain the moving trajectory of the moving part 1; or they can be omnidirectional wheels to easily and flexibly change the direction of movement. The material can be a high-temperature resistant metal to adapt to the high-temperature environment around the reverberatory furnace. If a track-based moving platform is used, the track can be installed on the ground, and the platform can slide along the track. The track can be made of stainless steel to ensure its strength and corrosion resistance.

[0030] The gas storage tank 2 is used to store inert gases such as nitrogen or argon. The tank body can be made of high-strength carbon steel to withstand a certain gas pressure. The control valve 21 on the gas storage tank 2 can be an electric ball valve. By controlling the opening and closing of the control valve 21, the flow rate of gas entering the transmission pipe 3 can be precisely controlled.

[0031] The distributor pipe 4 distributes the gas from the transmission pipe 3 to each jet head 5. The distributor pipe 4 can be made of high-temperature resistant alloy pipe to ensure its service life in the high-temperature aluminum liquid environment.

[0032] The implementation principle of the degassing device for aluminum molten metal processing in a reverberatory furnace according to Embodiment 1 of this application is as follows: The moving part 1 drives the entire degassing device to move within the reverberatory furnace, allowing the jet nozzles 5 to reach different positions. Inert gas in the gas storage tank 2 enters the transmission pipe 3 through the control valve 21, and is then distributed to each jet nozzle 5 through the diversion pipe 4, spraying gas into the molten aluminum for degassing. This expands the degassing coverage area and improves degassing efficiency and effect. Compared with the traditional single-pipe blowing method, it can effectively reduce degassing dead zones, solve the problem of excessive hydrogen content in the molten aluminum affecting the quality of castings, and has a lower cost than the permeable brick arrangement scheme at the furnace bottom. It can be adapted to an integrated reverberatory furnace that combines melting and hydrogen removal functions.

[0033] Example 2 See Figure 2 and Figure 3The difference between this embodiment and the above embodiment is that: a dosing device 11 is fixedly connected to the moving part 1, and a delivery pipe 12 is fixedly connected to the dosing device 11. The delivery pipe 12 passes through the transmission pipe 3 and the diversion pipe 4 in sequence. Multiple spray pipes 13 are fixedly connected to the side of the delivery pipe 12 away from the dosing device 11. Each spray pipe 13 corresponds to and is adjacent to the jet head 5, and the opening of the spray pipe 13 faces the jet head 5.

[0034] The dosing device 11 can be a quantitative dosing device 11, which can accurately control the amount of dehydrogenation agent added. The delivery pipe 12 and the spraying pipe 13 can be made of thin metal tubes to ensure their structural stability in high-temperature environments.

[0035] In this embodiment, the chemical flux delivered by the dosing device 11 is a special flux for purifying molten aluminum. The composition of the special flux for purifying molten aluminum may include one or more of fluoroaluminates (such as cryolite), alkali metal fluorides (such as sodium fluoride and potassium fluoride), and alkaline earth metal fluorides (such as calcium fluoride). These chemical fluxes may be pre-melted into a liquid state or mixed with a carrier into a slurry state. They are delivered through the dosing device 11 and sprayed out from the spray pipe 13 to merge with nitrogen gas. The nitrogen gas atomizes the flux and carries it into the interior of the molten aluminum.

[0036] The synergistic mechanism of chemical flux and nitrogen lies in the following: nitrogen bubbles provide the carrier and driving force for hydrogen removal, while the introduced chemical flux plays multiple roles. First, it effectively wets and adsorbs non-metallic inclusions (such as alumina) in the molten aluminum. Second, it alters the interfacial tension between the bubbles and the molten aluminum, enhancing the bubbles' ability to enrich hydrogen atoms. Third, some chemical flux components can react with harmful elements (such as sodium) in the molten aluminum, thus acting as a deterioration treatment. This synergistic effect of nitrogen and chemical flux achieves the goal of deep purification of molten aluminum, significantly outperforming the effects of single-gas refining or single-chemical flux treatment.

[0037] The implementation principle of a degassing device for aluminum molten metal processing in a reverberatory furnace according to Embodiment 2 of this application is as follows: Simultaneously with the jet degassing, the dosing device 11 introduces a hydrogen-removing chemical flux into the molten aluminum through the delivery pipe 12 and the spray pipe 13. The chemical flux works synergistically with nitrogen to further enhance the hydrogen removal effect. The chemical flux can chemically react with the hydrogen in the molten aluminum, fixing or converting the hydrogen, increasing the number of hydrogen atoms adsorbed by nitrogen, reducing the hydrogen content in the molten aluminum, and thus removing hydrogen from the molten aluminum more thoroughly, improving the quality of aluminum castings. Compared to the simple jet degassing method, the hydrogen removal effect is more significant.

[0038] Example 3 See Figure 4 and Figure 5The difference between this embodiment and the above embodiments is that: the transmission pipe 3 includes an inner pipe 31 and an outer pipe 32, and the jet head 5 includes a nozzle 51, a first nozzle 52, and a second nozzle 53. In this third embodiment of the application, the dosing device 11 is not provided (the dosing device 11 is in...). Figure 2 (as indicated by the bid), however, in other embodiments, a dosing device 11 may also be provided.

[0039] See Figure 4 and Figure 6 The transmission pipe 3 is used to transfer gas from the gas storage tank 2 to the distribution pipe 4. The outer pipe 32 is sleeved outside the inner pipe 31. The side of the inner pipe 31 closest to the gas storage tank 2 is adjacent to the side of the outer pipe 32 furthest from the gas storage tank 2. The inner pipe 31 and the outer pipe 32 are rotatably connected by a rotary seal. The outer pipe 32 connects to the gas storage tank 2, and the inner pipe 31 connects to the distribution pipe 4. A mounting block 6 is fixedly connected to the outer wall of the outer pipe 32, and the mounting block 6 is located near the inner pipe 31.

[0040] See Figure 6 and Figure 7 The mounting block 6 has a mounting groove 61 that connects to the outer tube 32. A rotating shaft 62 located within the mounting groove 61 is rotatably connected to the mounting block 6. The rotating shaft 62 is perpendicular to the inner tube 31. Multiple power blades 63 are evenly spaced along the circumferential side of the rotating shaft 62, with the power blades 63 closest to the outer tube 32 extending into the outer tube 32. The transmission pipe 3 is equipped with a transmission assembly 7. When the rotating shaft 62 rotates, the transmission assembly 7 drives the inner tube 31 to rotate. This structure allows the inner tube 31 to rotate relative to the outer tube 32, increasing the flexibility and coverage of the air jet.

[0041] The transmission assembly 7 includes a transmission helical gear 71, a connecting helical gear 72, a transmission gear 73, and a transmission chain 74. The connecting helical gear 72 is fixedly connected to the outer wall of the inner tube 31, located outside the outer tube 32, and positioned adjacent to the outer tube 32. A connecting shaft 321 is rotatably connected to the outer wall of the outer tube 32, and the transmission helical gear 71 is fixedly connected to the outer circumference of the connecting shaft 321, with the transmission helical gear 71 meshing with the connecting helical gear 72. There are multiple transmission gears 73; in this embodiment, there are two transmission gears 73, which are respectively fixedly connected to the outer circumference of the rotating shaft 62 and the outer circumference of the connecting shaft 321. The transmission chain 74 is sleeved on the outer circumference of the transmission gears 73 and meshes with them.

[0042] The transmission helical gear 71 and the connecting helical gear 72 can be made of high-strength alloy steel to ensure the stability and reliability of the transmission. The cooperation between the transmission gear 73 and the transmission chain 74 can accurately transmit the rotation of the rotating shaft 62 to the inner tube 31, realizing the rotation of the inner tube 31.

[0043] When the gas flows inside the transmission pipe 3, it impacts the power blade 63, causing the power blade 63 to drive the rotating shaft 62 to rotate. The transmission gear 73 on the rotating shaft 62 drives the transmission gear 73 on the connecting shaft 321 to rotate via the transmission chain 74. The transmission helical gear 71 on the connecting shaft 321 meshes with the connecting helical gear 72 on the outer wall of the inner pipe 31, thereby driving the inner pipe 31 to rotate. This transmission structure can effectively transmit power to the inner pipe 31, enabling the inner pipe 31 to rotate smoothly, which in turn drives the jet head 5 to change the jet direction, expand the degassing range, and improve the degassing effect.

[0044] See Figure 4 and Figure 5 Secondly, the first nozzle 52 is connected and fixed to the splitter pipe 4, and the second nozzle 53 slides up and down inside the first nozzle 52, with the second nozzle 53 protruding out of the first nozzle 52 in a direction away from the splitter pipe 4. The outer peripheral sidewall of the second nozzle 53 is slidably connected to the inner peripheral sidewall of the first nozzle 52, and the nozzle head 51 is fixedly connected to the side of the second nozzle 53 away from the splitter pipe 4. The splitter pipe 4 is equipped with a drive assembly. When the inner pipe 31 rotates, the drive assembly drives the second nozzle 53 to slide up and down reciprocally. In this way, the nozzle head 5 can not only change the jet direction with the rotation of the inner pipe 31, but also move up and down to change the jet height, further expanding the degassing range.

[0045] See Figure 7 and Figure 8 The drive assembly includes a reciprocating lead screw 8, a drive bar 81, a first drive gear 82, a second drive gear 83, a drive chain 84, a drive shaft 85, a drive gear 86, and a drive gear ring 87. The reciprocating lead screw 8 is rotatably connected to the inner wall of the splitter pipe 4, and the reciprocating lead screw 8 is parallel to the first nozzle 52, extending into the first nozzle 52 in a one-to-one correspondence.

[0046] A drive bar 81 is disposed on the second nozzle 53. The drive bar 81 includes a first bar body 811 and a second bar body 812. The first bar body 811 is fixed relative to one end of the second nozzle 53 near the splitter pipe 4. The two ends of the second bar body 812 are respectively connected and fixed to the first bar body 811. The first bar body 811 is threadedly connected to the reciprocating screw 8. The first nozzle 52 is provided with a limiting element that restricts the rotation of the second nozzle 53. The limiting element is a limiting block 531, which is fixedly connected to the outer wall of the second nozzle 53. A limiting groove 521 extending axially is opened on the inner wall of the first nozzle 52. The limiting block 531 slides up and down in the limiting groove 521.

[0047] The first drive gear 82 is fixedly connected to the outer periphery of the reciprocating lead screw 8. The drive chain 84 is sleeved on the outer periphery of the first drive gear 82 and meshes with it. A bearing block is fixedly connected to the wall of the split pipe 4 and the inner pipe 31, and the bearing block extends to the opening of the inner pipe 31. The drive shaft 85 is rotatably connected to the bearing block and extends into the outer pipe 32, and the drive shaft 85 is parallel to the inner pipe 31. The second drive gear 83 is fixedly connected to the end of the drive shaft 85 and meshes with the drive chain 84. The drive gear ring 87 is fixedly connected to the inner periphery of the outer pipe 32. The drive gear 86 is fixedly connected to the end of the drive shaft 85 away from the second drive gear 83, and the drive gear 86 meshes with the drive gear ring 87.

[0048] The reciprocating lead screw 8 can be a trapezoidal lead screw, which has good transmission efficiency and self-locking performance. The threaded connection between the first body 811 of the drive bar 81 and the reciprocating lead screw 8 can convert the rotation of the reciprocating lead screw 8 into the up and down movement of the second nozzle 53.

[0049] When the inner tube 31 rotates, the power gear 86 meshes with the power gear ring 87, driving the power shaft 85 to rotate. The second drive gear 83 at the end of the power shaft 85 drives the first drive gear 82 to rotate via the drive chain 84, thereby causing the reciprocating screw 8 to rotate. Since the drive bar 81 is threadedly connected to the reciprocating screw 8 and the limiting block 531 restricts the rotation of the second nozzle 53, the second nozzle 53 slides up and down under the action of the reciprocating screw 8, realizing the up and down movement of the jet head 5. This structure allows the jet head 5 to change its jet position in the vertical direction, further expanding the degassing range. Combined with the rotation of the jet head 5, it can more comprehensively cover the aluminum liquid area inside the furnace, improving the degassing effect.

[0050] The implementation principle of a degassing device for aluminum molten metal processing in a reverberatory furnace according to Embodiment 3 of this application is as follows: The gas flow inside the transmission pipe 3 drives the power blade 63 to rotate, which in turn causes the inner pipe 31 to rotate through the transmission assembly 7. This, in turn, drives the second nozzle 53 of the jet head 5 to slide up and down repeatedly, spraying gas into the molten aluminum from multiple directions and heights. This expands the degassing coverage area and improves degassing efficiency and effect. Compared with the traditional single-pipe blowing method, it can effectively reduce degassing dead zones, solve the problem of excessive hydrogen content in the molten aluminum affecting the quality of castings, and has a lower cost than the permeable brick arrangement scheme at the furnace bottom. It can be adapted to an integrated reverberatory furnace that combines melting and hydrogen removal functions.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A degassing device for aluminum molten metal processing in a reverberatory furnace, characterized in that: Including the moving part (1); A gas storage tank (2) is disposed on the movable part (1); A transmission pipe (3) is provided on the gas storage tank (2), and a control valve (21) is provided on the gas storage tank (2) to control the gas entering the transmission pipe (3). The transmission pipe (3) extends into the reactor. The diversion pipe (4) is located on the side of the transmission pipe (3) away from the gas storage tank (2) and is connected to it; Multiple jet heads (5) are spaced apart on the split pipe (4), and the jet heads (5) are connected to the split pipe (4).

2. The degassing device for aluminum molten metal processing in a reverberatory furnace according to claim 1, characterized in that: The moving part (1) is provided with a dosing device (11), and the dosing device (11) is connected to a delivery pipe (12). The delivery pipe (12) passes through the transmission pipe (3) and the diversion pipe (4) in sequence. The delivery tube (12) is provided with a plurality of spray tubes (13) on the side away from the dosing device (11), and the spray tubes (13) correspond one to one with the jet head (5) and are adjacent to each other.

3. The degassing device for aluminum molten metal processing in a reverberatory furnace according to claim 1, characterized in that: The transmission tube (3) includes an inner tube (31) and an outer tube (32); The outer tube (32) is sleeved outside the inner tube (31), and the inner tube (31) and the outer tube (32) are rotatably connected. The outer tube (32) is connected to the gas storage tank (2), and the inner tube (31) is connected to the diversion pipe (4). The outer wall of the outer tube (32) is provided with an installation block (6), and the installation block (6) has an installation groove (61) that communicates with the outer tube (32). The mounting block (6) is rotatably connected to a rotating shaft (62) located in the mounting groove (61). Multiple power blades (63) are evenly spaced along the circumferential side of the rotating shaft (62), and the power blades (63) near the outer tube (32) extend into the outer tube (32). The transmission tube (3) is provided with a transmission assembly (7). When the rotating shaft (62) rotates, the transmission assembly (7) drives the inner tube (31) to rotate.

4. The degassing device for aluminum molten metal processing in a reverberatory furnace according to claim 3, characterized in that: The transmission assembly (7) includes a transmission helical gear (71), a connecting helical gear (72), a transmission gear (73), and a transmission chain (74). The connecting helical gear (72) is disposed on the outer wall of the inner tube (31), and a connecting shaft (321) is rotatably connected to the outer wall of the outer tube (32). The transmission helical gear (71) is disposed on the outer circumference of the connecting shaft (321), and the transmission helical gear (71) meshes with the connecting helical gear (72). The transmission gears (73) are multiple and are respectively disposed on the outer periphery of the rotating shaft (62) and the outer periphery of the connecting shaft (321). The transmission chain (74) is sleeved on the outer periphery of the transmission gears (73) and meshes with them.

5. A degassing device for aluminum molten metal processing in a reverberatory furnace according to claim 4, characterized in that: The jet head (5) includes a nozzle (51), a first nozzle (52) and a second nozzle (53); The first nozzle (52) is connected to the split pipe (4), and the second nozzle (53) is disposed inside the first nozzle (52). The outer peripheral sidewall of the second nozzle (53) is slidably connected to the inner peripheral sidewall of the first nozzle (52). The nozzle (51) is located on the side of the second nozzle (53) away from the diverter pipe (4). The diverter pipe (4) is provided with a drive assembly. When the inner tube (31) rotates, the drive assembly drives the second nozzle (53) to slide up and down repeatedly.

6. A degassing device for aluminum molten metal processing in a reverberatory furnace according to claim 5, characterized in that: The drive assembly includes a reciprocating lead screw (8), a drive bar (81), a first drive gear (82), a second drive gear (83), a drive chain (84), a power shaft (85), a power gear (86), and a power gear ring (87). The reciprocating screw (8) is rotatably connected to the inner wall of the split pipe (4). The reciprocating screw (8) extends into the first nozzle (52) and corresponds to it. The drive bar (81) is disposed in the second nozzle (53). The drive bar (81) is threadedly connected to the reciprocating screw (8). The first nozzle (52) is provided with a limiting member to restrict the rotation of the second nozzle (53). The first drive gear (82) is disposed on the outer periphery of the reciprocating screw (8), and the drive chain (84) is sleeved on the outer periphery of the first drive gear (82) and meshes with it; The power shaft (85) is rotatably connected to the split pipe (4) and extends into the inner pipe (31). The second drive gear (83) is disposed at the end of the power shaft (85) and meshes with the drive chain (84). The power gear ring (87) is disposed on the inner wall of the outer tube (32), and the power gear (86) is disposed on the power shaft (85). The power gear (86) meshes with the power gear ring (87).

7. A degassing device for aluminum molten metal processing in a reverberatory furnace according to claim 6, characterized in that: The limiting component is a limiting block (531), which is disposed on the outer wall of the second nozzle (53). A limiting groove (521) is provided on the inner wall of the first nozzle (52) for the limiting block (531) to slide up and down.

8. A degassing device for aluminum molten metal processing in a reverberatory furnace according to claim 6, characterized in that: The drive bar (81) includes a first bar body (811) and a second bar body (812). The first strip (811) is disposed opposite to the second nozzle (53) at one end near the split pipe (4), the second strip (812) is connected relative to the first strip (811), and the first strip (811) is threadedly connected to the reciprocating screw (8).

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