Magnesium steam dynamic flow guide baffle, magnesium ingot reduction device and manufacturing method

Abstract

The invention relates to a magnesium steam dynamic flow guide baffle, a magnesium ingot reduction device and a manufacturing method. The magnesium steam dynamic flow guide baffle comprises a shell, a base and a dynamic adjusting mechanism. The shell is matched with a tank opening of the magnesium ingot reduction tank in size; the end, close to the crystallization barrel, of the shell is open, and the other end is provided with an air inlet. The base is mounted in the opening, and a movable cavity is reserved between the base and the air inlet; at least one air outlet and at least one mounting cavity are formed in the base; the air outlet penetrates through the base and is used for communicating the movable cavity with the outside. According to the invention, the dynamic adjusting mechanism is arranged; closed-loop regulation of pressure triggering-dynamic pressure relief-automatic reset is formed, sudden pressure rise is effectively avoided, and the pressure in the reduction tank is kept stable, so that the pressure load of the reduction tank is effectively reduced, the service life of equipment is greatly prolonged, meanwhile, magnesium steam can be relatively uniformly distributed, and the service life of the equipment is prolonged. And a large amount of magnesium steam produced in the reduction tank cannot enter the crystallization barrel in a short time, so that the crystallization effect is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of magnesium ingot smelting, and in particular to a magnesium vapor dynamic flow guide baffle, a magnesium ingot reduction device and a method for manufacturing the magnesium vapor dynamic flow guide baffle. Background Art

[0002] The reduction process in the magnesium alloy plant's reduction workshop involves loading pellets into a reduction tank, which is then loaded sequentially into a new guide baffle, a crude magnesium crystallizer, a crystallization cylinder, and an end cap. During the heating process, magnesium vapor flows under negative pressure to a designated area for crystallization.

[0003] In order to reduce the heat transfer between the reduction tank and the crystallization barrel, an insulating baffle is installed between the reduction tank and the crystallization barrel. The existing insulating baffle is usually a hexagonal metal plate. Although it can play a certain role in heat insulation, there is a large gap between it and the mouth of the reduction tank. Magnesium vapor will enter the crystallization area in a divergent manner along the gap, causing the crude magnesium to crystallize outside the crystallization barrel, thus producing the so-called "big-head magnesium". Too much "big-head magnesium" will cause the crystallization barrel and its supporting water-cooling jacket and other equipment to stick together, which not only affects the order and time of the furnace loading, but also increases equipment loss, personnel workload and cost during processing, and significantly increases safety risks. At the same time, the disordered entry of magnesium vapor from the gap also affects the quality of crude magnesium crystallization, causing the quality of refined magnesium to decline in the later process.

[0004] To reduce or avoid this situation, existing technologies have modified the dimensions of the baffles to match the size of the reduction tank opening, in the hope of blocking the opening. However, in actual use, it was found that this design prevented the magnesium vapor from being discharged in a timely manner, significantly increasing the pressure inside the reduction tank. This prolonged high pressure load severely shortened the reduction tank's service life. Summary of the Invention

[0005] Based on this, it is necessary to provide a magnesium vapor dynamic guide baffle, a magnesium ingot reduction device and a manufacturing method to address the problem that the existing thermal insulation baffle solves the "big head magnesium" problem while causing excessive pressure in the reduction tank.

[0006] In a first aspect, the present invention proposes a magnesium vapor dynamic flow guide baffle, which is located between a reduction tank and a crystallization barrel and installed at the tank opening of the magnesium ingot reduction tank. The magnesium vapor dynamic flow guide baffle comprises: a shell, a base, and a dynamic adjustment mechanism.

[0007] The shell is of the same size as the opening of the magnesium ingot reduction tank; the shell is opened at one end close to the crystallization barrel, and an air inlet is provided at the other end. The base is installed in the opening, and a movable cavity is left between the base and the air inlet; at least one air outlet and at least one mounting cavity are provided on the base; the air outlet runs through the base and is used to connect the movable cavity with the outside world. The dynamic adjustment mechanism includes an opening and closing plate, at least one connecting rod, and at least one spring; the opening and closing plate is provided in the movable cavity and covers the air inlet; an air vent connected to the air inlet is provided on the opening and closing plate; one end of the connecting rod is connected to the side of the opening and closing plate away from the air inlet, and the other end extends into the mounting cavity; the spring is installed in the mounting cavity and is used to elastically support the connecting rod.

[0008] In the second aspect, the present invention also proposes a magnesium ingot reduction device, which includes a reduction tank, a crystallization barrel, and a magnesium vapor dynamic guide baffle as described in the first aspect; the tank mouth of the reduction tank and the barrel mouth of the crystallization barrel are connected; the magnesium vapor dynamic guide baffle is arranged between the reduction tank and the crystallization barrel.

[0009] In a third aspect, the present invention further provides a method for manufacturing a magnesium vapor dynamic flow guide baffle, which is used to manufacture the magnesium vapor dynamic flow guide baffle as described in the first aspect. The method for manufacturing the magnesium vapor dynamic flow guide baffle comprises the following steps:

[0010] S1. The steel raw material is heated to 1500-1600°C and smelted for 2-3 hours to turn the steel raw material into molten steel with uniform composition.

[0011] S2. The molten steel is poured, the pouring temperature is controlled at 1300-1600° C., the pressure is set to 0.05-0.1 MPa, and the pressure holding time is set to 30-60 seconds. After the pouring is completed, the casting is demoulded after air cooling to room temperature to obtain a casting.

[0012] S3. After cleaning the impurities and oxide scale on the surface of the casting, heat treatment is performed: first, the casting is normalized at 800-900°C for 2-3 hours, and then tempered at 600-700°C for 1-2 hours; after the heat treatment is completed, a high-temperature resistant casting is obtained.

[0013] S4. Mechanically processing or assembling the heat-treated casting to obtain the magnesium vapor dynamic guide baffle.

[0014] The beneficial effects of the present invention are:

[0015] 1. The outer edge of the dynamic guide baffle of magnesium vapor provided by the present invention can be fully fitted with the tank mouth of the reduction tank. On the one hand, a high-efficiency heat insulation barrier is constructed between the high-temperature reduction tank and the low-temperature crystallization barrel, separating the heat radiation area in the reduction tank from the low-temperature crystallization area of ​​the crystallization barrel, effectively blocking heat conduction. On the other hand, the dynamic guide baffle of magnesium vapor is fully fitted with the tank mouth of the reduction tank, which can prevent magnesium vapor from diverging into the crystallization area from the gaps around it, thereby reducing or avoiding the generation of "big-head magnesium".

[0016] 2. The present invention forms a closed-loop control of "pressure triggering - dynamic pressure relief - automatic reset" through the setting of a dynamic adjustment mechanism, which effectively avoids sudden pressure rise and maintains stable pressure in the reduction tank, thereby effectively reducing the pressure load of the reduction tank and significantly extending the service life of the equipment. At the same time, it can also make the magnesium vapor relatively evenly distributed, preventing the magnesium vapor produced in the reduction tank from entering the crystallization barrel in a short period of time, thereby greatly improving the crystallization effect.

[0017] 3. The present invention, through structural design and manufacturing process, makes the magnesium vapor dynamic guide baffle have high structural strength and good high temperature resistance, which can reduce or avoid the problem of high temperature deformation and improve the durability and reliability of the dynamic guide baffle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 Schematic diagram of the half-section structure of the dynamic guide baffle of magnesium vapor in the embodiment;

[0020] Figure 2 for Figure 1 Cross-section along the AA direction;

[0021] Figure 3 This is a schematic diagram of the front structure of the base;

[0022] Figure 4 for Figure 3 Cross-section along the mid-BB direction;

[0023] Figure 5 is a schematic cross-sectional view of the opening and closing plate;

[0024] Figure 6 It is a schematic diagram of the state when the opening and closing plate is in a dynamic equilibrium state;

[0025] Figure 7This is a schematic diagram of the state when the opening and closing plate is in a fully open state;

[0026] Figure 8 Schematic diagram of the structure of a magnesium ingot reduction device in another embodiment.

[0027] In the figure: shell 1, air inlet 11, movable cavity 12, flange 13, base 2, air outlet 21, installation cavity 22, notch 23, connecting hole 24, opening and closing plate 3, air vent 31, connecting rod 4, spring 5, hollow reinforcement 6, reduction tank 7, crystallization barrel 8, end cover 9. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component. When a component is considered to be "fixed to" another component, it may be directly fixed to the other component or there may be a central component.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] The outer edge of the dynamic guide baffle for magnesium vapor provided by the present invention can be completely fitted with the tank mouth of the reduction tank 7, thereby preventing the magnesium vapor from diverging into the crystallization area from the gaps around it. However, in practice, although simply changing the shape of the baffle can reduce or prevent the generation of "big-head magnesium", over-closing the tank mouth will cause a large amount of magnesium vapor to accumulate in the reduction tank 7, increasing the pressure load of the reduction tank 7 and affecting the service life of the equipment. Based on the above-mentioned negative correlation between the generation of "big-head magnesium" and the pressure load, this embodiment provides a dynamic guide baffle for magnesium vapor, which is located between the reduction tank 7 and the crystallization barrel 8 and is installed at the tank mouth of the magnesium ingot reduction tank 7. Specifically, please refer to Figure 1 and Figure 2 ( Figure 1 The middle opening and closing plate 3 is not shown), Figure 2 for Figure 1 AA cross-sectional view. The magnesium vapor dynamic guide baffle includes a shell 1, a base 2, a dynamic adjustment mechanism, and a hollow reinforcement 6. Among them, the shell 1 is cylindrical as a whole, and its outer wall fits the tank mouth of the reduction tank 7. In order to further improve the sealing performance, a flange 13 is provided on the outer wall of one end of the shell 1. The cross-sectional shape of the flange 13 is set to a wedge shape. When in use, the side of the flange 13 (that is, the surface perpendicular to the axial direction of the shell 1) is against the tank mouth of the reduction tank 7. When the end cover 9 of the crystallization barrel 8 applies pressure, the flange 13 is compressed to form a primary extrusion seal with the reduction tank 7. The inclined surface of the wedge-shaped flange 13 (that is, the circumferential surface of the flange 13) is against the inner wall of the crystallization barrel 8. The internal space of the crystallization barrel 8 is truncated cone-shaped, so that the inclined surface of the inner wall of the crystallization barrel 8 is parallel to the inclined surface of the flange 13. The inner wall of the barrel mouth of the crystallization barrel 8 interacts with the flange 13 to form a secondary extrusion seal, thereby preventing magnesium vapor from overflowing to the outside of the crystallization barrel 8 and condensing. In addition, a circular opening is provided at one end of the shell 1 close to the crystallization barrel 8, and a circular air inlet 11 is provided at the other end. Figure 3 、 Figure 4 As shown, Figure 4 for Figure 3 BB cross-sectional view. The base 2 is configured to be a matching cylindrical shape, which is installed in the opening and just blocks the opening. At the same time, a movable cavity 12 is left between the base 2 and the air inlet 11. Four air outlet holes and four mounting cavities 22 are evenly arranged on the base 2 along its center ring. The air outlet hole passes through the base 2 axially to connect the inside and outside of the shell 1. In addition, the area of ​​the four air outlets 21 is greater than or equal to the area of ​​the air inlet 11, so that the magnesium vapor in the reduction tank 7 can smoothly pass through the air inlet 11 and the air outlet 21 and enter the crystallization barrel 8.

[0033] The dynamic adjustment mechanism is a design focus of the present invention. This special design can not only dynamically adjust and balance the magnesium vapor pressure in the reduction tank 7 and the crystallization barrel 8, but also avoid a sudden increase in pressure in the reduction tank 7 due to the large amount of magnesium vapor generated, thereby extending the service life of the reduction tank 7. It can also accurately control the amount of magnesium vapor entering the crystallization barrel 8 and its crystallization time through the regular pressure increase and pressure reduction process in the reduction tank 7, so that the crude magnesium after crystallization can be evenly distributed in the crystallization barrel 8, effectively improving the quality of the crude magnesium product. Specifically, the dynamic adjustment mechanism includes an opening and closing plate 3, four connecting rods 4, and four springs 5. Among them, the opening and closing plate 3 is arranged in the active cavity 12 between the air inlet 11 and the base 2 in the shell 1, and the area of ​​the opening and closing plate 3 is larger than the area of ​​the air inlet 11, so that the opening and closing plate 3 can cover the entire air inlet 11 to realize the opening and closing of the air inlet 11. As Figure 5 As shown, the middle portion of the opening and closing plate 3 is concave toward the base 2, giving the overall shape of a truncated cone. A vent hole 31 is provided in the center of the opening and closing plate 3 (i.e., the concave portion). The vent hole 31 corresponds to the center of the air inlet 11, facilitating the passage of magnesium vapor. Four connecting holes 24 are provided on the side of the base 2 near the opening and closing plate 3, communicating with the mounting cavity 22. One end of each of the four connecting rods 4 is connected to the side of the opening and closing plate 3 near the base 2, while the other end extends through the connecting rods 4 into the four mounting cavities 22. Four springs 5 ​​are also installed in the four mounting cavities 22, with one end of each spring 5 exactly contacting the end of the connecting rod 4, providing elastic support for the connecting rod 4. The upper limit of the total elastic force of the four springs 5 ​​can be set as the upper limit of the thrust of the opening and closing plate 3 by the maximum pressure in the reduction tank 7. To prevent magnesium vapor from entering the mounting cavity 22, a metal sealing gasket can also be provided at the orifice of the connecting hole 24 to seal the connection between the connecting rod 4 and the connecting hole 24. According to the design of the dynamic adjustment mechanism, there are three states: closed state, dynamic equilibrium state and fully open state. When in the closed state, such as Figure 1 As shown, the opening and closing plate 3 and the inner wall of the housing 1 with the air inlet 11 are against each other. At this time, the air inlet 11-air vent 31-air outlet 21 form the air flow path of magnesium vapor. When in a dynamic equilibrium state, as shown in FIG. Figure 6 As shown, the opening and closing plate 3 is separated from the inner wall of the housing 1 where the air inlet 11 is opened. At this time, the air inlet 11-air vent 31 and the surrounding of the opening and closing plate 3-air outlet 21 form an air flow path. When in the fully open state, as shown Figure 7 As shown, the side of the opening and closing plate 3 away from the air inlet 11 abuts against the base 2, and the air inlet 11 is closed by the base 2. At this time, the air inlet 11-the surrounding of the opening and closing plate 3-the air outlet 21 form an air flow path.

[0034] Furthermore, a cylindrical notch 23 is provided on the side of the base 2, away from the closing plate 3. This notch 23 communicates with the four mounting cavities 22 to facilitate the installation of the springs 5 ​​within the mounting cavities 22. The hollow reinforcement 6 is also cylindrical in shape and hollow in structure. This air reinforcement precisely fills the notch 23, reliably sealing the mounting cavities 22 and preventing magnesium vapor from infiltrating and crystallizing. The hollow reinforcement 6 enhances the structural strength of the dynamic deflector baffle while effectively reducing its overall weight, further improving its durability and reliability.

[0035] The working principle of the present invention is as follows: the present invention is installed between the reduction tank 7 and the crystallization barrel 8, and the tank opening of the reduction tank 7 is sealed, so that the magnesium vapor in the reduction tank 7 enters the crystallization barrel 8 through the dynamic magnesium vapor guide baffle, and the flow rate of the magnesium vapor can be adjusted according to the pressure change in the reduction tank 7. In the initial stage of heating the reduction tank 7, when the pressure in the reduction tank 7 is at a low level, such as Figure 1 As shown, magnesium vapor flows slowly and steadily into the crystallization barrel 8 through the air inlet 11-air vent 31-air outlet 21 path, ensuring that the initial crystallization is stable and controllable. As the temperature of the reduction tank 7 continues to rise, the pressure inside it rises to 40-80Pa, and the spring 5 is compressed. The opening and closing plate 3 gradually moves away from the air inlet 11, as shown in FIG. Figure 6 In the state shown, magnesium vapor enters the crystallization barrel 8 quickly and in large quantities through the path of the air inlet 11-air vent 31 and the opening and closing plate 3 around the air outlet 21. As the pressure in the reduction tank 7 fluctuates, the opening of the opening and closing plate 3 relative to the air inlet 11 also changes continuously, thereby regulating the flow rate of magnesium vapor entering the crystallization barrel 8, making the magnesium vapor relatively evenly distributed, and preventing the magnesium vapor produced in the reduction tank 7 from entering the crystallization barrel 8 in large quantities in a short period of time, thereby greatly improving the crystallization effect. On the other hand, when the pressure in the reduction tank 7 reaches 40-80Pa, it automatically releases the pressure (i.e., the spring 5 is compressed). When it falls back to 40Pa, the spring 5 resets and drives the opening and closing plate 3 around to close the air inlet 11, restoring the diversion mode of the air vent 31 path. This dynamic adjustment mechanism forms a "pressure trigger-dynamic pressure relief-automatic reset" closed-loop control, which effectively avoids a sudden rise in pressure and maintains the pressure in the reduction tank 7 stable, thereby effectively reducing the pressure load of the reduction tank 7 and significantly extending the service life of the equipment.

[0036] In another embodiment, a magnesium ingot reduction device is also provided, such as Figure 8As shown, it includes a reduction tank 7, a crystallization barrel 8, and a baffle. Wherein, the baffle is the dynamic diversion baffle for magnesium vapor in the above-mentioned embodiment. The tank mouth of the reduction tank 7 is docked with the barrel mouth of the crystallization barrel 8. The dynamic diversion baffle is then installed at the tank mouth of the reduction tank 7. And the side of the flange 13 of the dynamic diversion baffle is against the tank mouth of the reduction tank 7. When the end cover 9 of the crystallization barrel 8 applies pressure, the flange 13 is compressed and forms a primary extrusion seal with the reduction tank 7. The inclined surface of the wedge-shaped flange 13 is against the inner wall of the crystallization barrel 8, and the internal space of the crystallization barrel 8 is truncated cone-shaped, so that the inclined surface of the inner wall of the crystallization barrel 8 is parallel to the inclined surface of the flange 13. The inner wall of the barrel mouth of the crystallization barrel 8 interacts with the flange 13 to form a secondary extrusion seal, thereby preventing magnesium vapor from overflowing to the outside of the crystallization barrel 8 and condensing. The dynamic guide baffle in the magnesium ingot reduction device, on the one hand, builds an efficient heat insulation barrier between the high-temperature reduction tank 7 and the low-temperature crystallization barrel 8, and on the other hand, can maintain the pressure in the reduction tank 7 stable, thereby effectively reducing the pressure load of the reduction tank 7 and greatly extending the service life of the equipment.

[0037] In another embodiment, a method for manufacturing a magnesium vapor dynamic flow guide baffle is also provided, which is used to manufacture the magnesium vapor dynamic flow guide baffle in the above embodiment. The method comprises the following steps:

[0038] S1. Melting: Put the steel raw material into a medium frequency induction furnace, heat it to 1580°C and melt it for 2.5 hours to make the steel raw material into molten steel with uniform composition. In this embodiment, the steel raw material can be cast stainless steel with the grade of ZG35Cr24Ni7SiN.

[0039] S2. Casting: The molten steel is poured using a low-pressure casting process. After pouring, the casting is air-cooled to room temperature and then demolded to obtain the casting. The pouring temperature is controlled at 1480°C, the pressure is set to 0.06 MPa, and the holding time is set to 40 seconds to improve the density of the casting mold.

[0040] S3. Heat Treatment: First, the casting is shot blasted for 15-20 minutes to remove surface impurities and scale. The casting is then normalized at 880°C for 2.5 hours and tempered at 680°C for 1.5 hours to optimize mechanical properties. After heat treatment, a high-temperature-resistant casting is obtained.

[0041] S4. Mechanically processing or assembling the heat-treated casting to obtain a magnesium vapor dynamic guide baffle.

[0042] The dynamic guide baffle manufactured by this method has stable high-temperature performance and is not easily deformed or oxidized under the high-temperature environment of the reduction tank 7. It also has good density, reduces defects such as pores, and improves strength and toughness.

[0043] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A magnesium vapor dynamic guide baffle, located between a reduction tank (7) and a crystallization barrel (8), and installed at the tank mouth of the magnesium ingot reduction tank (7), characterized in that: It includes: The shell (1) is sized to match the opening of the magnesium ingot reduction tank (7); the shell (1) is opened at one end close to the crystallization barrel (8), and the other end is provided with an air inlet (11); A base (2) is installed in the opening and leaves an active cavity (12) between the base (2) and the air inlet (11); at least one air outlet (21) and at least one installation cavity (22) are provided on the base (2); the air outlet (21) passes through the base (2) and is used to connect the active cavity with the outside world; A dynamic adjustment mechanism comprises an opening and closing plate (3), at least one connecting rod (4), and at least one spring (5); the opening and closing plate (3) is arranged in a movable cavity (12) and covers an air inlet (11); an air vent (31) communicating with the air inlet (11) is provided on the opening and closing plate (3); one end of the connecting rod (4) is connected to a side of the opening and closing plate (3) away from the air inlet (11), and the other end extends into the installation cavity (22); the spring (5) is installed in the installation cavity (22) and is used for elastically supporting the connecting rod (4).

2. The magnesium vapor dynamic guide baffle according to claim 1, characterized in that: The dynamic adjustment mechanism includes a closed state, a dynamic equilibrium state, and a fully open state; When in a closed state, the opening and closing plate (3) abuts against the inner wall of the housing (1) where the air inlet (11) is provided, and the air inlet (11) - the air vent (31) - the air outlet (21) form an air flow path; When in a dynamic equilibrium state, the opening and closing plate (3) is separated from the inner wall of the housing (1) where the air inlet (11) is provided, and the air inlet (11) - the air vent (31), and the periphery of the opening and closing plate (3) - the air outlet (21) form an air flow path; When in a fully open state, the side of the opening and closing plate (3) away from the air inlet (11) abuts against the base (2), and the air inlet (11) - the periphery of the opening and closing plate (3) - the air outlet (21) form an air flow path.

3. The magnesium vapor dynamic guide baffle according to claim 1, characterized in that: The magnesium vapor dynamic flow guide baffle further comprises a hollow reinforcement member (6); a notch (23) is provided on a side of the base (2) away from the closing plate (3); the notch (23) is communicated with the installation cavity (22); and the hollow reinforcement member (6) is installed in the notch (23).

4. The magnesium vapor dynamic guide baffle according to claim 1, characterized in that: A connecting hole (24) communicating with the mounting cavity (22) is provided on one side of the base (2) close to the opening and closing plate (3); the connecting rod (4) extends into the mounting cavity (22) through the connecting rod (4); and a sealing gasket for sealing the mounting cavity (22) is provided at the opening of the connecting hole (24).

5. The magnesium vapor dynamic guide baffle according to claim 1, characterized in that: The middle portion of the opening and closing plate (3) is concave inwardly toward the base (2), and is in the shape of a truncated cone as a whole; the air vent (31) is located at the center of the opening and closing plate (3) and corresponds to the center of the air inlet (11).

6. The magnesium vapor dynamic guide baffle according to claim 1, characterized in that: Four air outlets (21) and four mounting cavities (22) are provided and are evenly distributed in a circular shape along the center of the base (2).

7. The magnesium vapor dynamic guide baffle according to claim 1, characterized in that: An end of the housing (1) away from the air inlet (11) is provided with a flange (13); the cross section of the flange (13) is set to be wedge-shaped.

8. The magnesium vapor dynamic guide baffle according to claim 1, characterized in that: The area of ​​the air outlet (21) is not less than the area of ​​the air inlet (11).

9. A magnesium ingot reduction device, comprising a reduction tank (7), a crystallization barrel (8), and a baffle; the tank opening of the reduction tank (7) and the barrel opening of the crystallization barrel (8) are connected; the baffle is arranged between the reduction tank (7) and the crystallization barrel (8); It is characterized by: The baffle is the magnesium vapor dynamic guide baffle according to any one of claims 1 to 8.

10. A method for manufacturing a magnesium vapor dynamic guide baffle, characterized in that: It is used to manufacture the magnesium vapor dynamic guide baffle according to any one of claims 1 to 8; It includes the following steps: S1. Heating the steel raw material to 1500-1600°C and melting for 2-3 hours to convert the steel raw material into molten steel with uniform composition; S2, pouring the molten steel, wherein the pouring temperature is controlled at 1300-1600°C, the pressure is set to 0.05-0.1 MPa, and the pressure holding time is set to 30-60 seconds; after the pouring is completed, air cooling to room temperature is performed and then demolding is performed to obtain a casting; S3. After cleaning the impurities and oxide scale on the surface of the casting, heat treatment is performed: first, the casting is normalized at 800-900°C for 2-3 hours, and then tempered at 600-700°C for 1-2 hours; after the heat treatment is completed, a high-temperature resistant casting is obtained; S4. Mechanically processing or assembling the heat-treated casting to obtain the magnesium vapor dynamic guide baffle.

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