A gas-agitated composite assembly, and a degassing box for continuous casting production comprising the assembly

Abstract

The application belongs to the technical field of equipment for casting and rolling production, and particularly relates to an air-adding and stirring composite component and a degassing box for casting and rolling production comprising the component. The structure of the air-adding and stirring composite component comprises a slotted composite central shaft unit at the upper end for connecting an inert gas generating device, a perforated stirring pipe unit arranged on the slotted composite central shaft unit and protruding radially outward to serve as an air-adding position close to each other and an annular heater, a support ring arranged on the slotted composite central shaft unit and located below the perforated stirring pipe unit, and an inclined plate for height difference compensation connected to the perforated stirring pipe unit and the support ring at the upper and lower ends respectively.

Description

Technical Field

[0001] This application belongs to the technical field of equipment for casting and rolling production, and particularly relates to an aeration and stirring composite component, and a degassing box for casting and rolling production including the component. Background Technology

[0002] The degassing box used in casting and rolling production is one of the key pieces of equipment in the continuous casting and rolling process of aluminum or aluminum alloys. It is mainly used to remove hydrogen and other non-metallic inclusions from the molten metal before it enters the casting nozzle, thereby reducing porosity and inclusion defects and ultimately improving the quality of the cast billet.

[0003] The functions of the aforementioned degassing box mainly include the following three aspects.

[0004] First, hydrogen removal: During the smelting and transfer of aluminum liquid, it absorbs moisture from the air. The moisture decomposes to produce hydrogen gas. When the hydrogen solidifies, it precipitates and forms pores, which seriously affect the mechanical properties of the material. The degassing box uses an inert gas (such as nitrogen or argon) to bubble the hydrogen from the aluminum liquid into the bubbles, and finally removes it.

[0005] Second, remove inclusions: Non-metallic inclusions such as oxides and slag are separated from the molten aluminum through flotation, adsorption and other mechanisms.

[0006] Third, uniform temperature and composition: During the degassing process, stirring helps to make the temperature of the aluminum liquid and the distribution of alloying elements more uniform.

[0007] Generally, the common structure of the above-mentioned degassing box mainly includes: a box body, a stirring structure, a gas introduction structure, a heating and insulation structure, and a liquid level and temperature control structure. The working principle of this degassing box mainly includes the following five points:

[0008] 1. Molten aluminum flows from the smelting furnace into the tank;

[0009] 2. The inert gas is sheared into micron-sized bubbles by the rotating stirring structure and uniformly dispersed in the molten aluminum;

[0010] 3. Hydrogen atoms diffuse into the bubble due to the concentration gradient and are expelled as the bubble rises;

[0011] 4. Impurities are adsorbed by air bubbles or float to the surface of the liquid to form scum, which can be scooped out and removed;

[0012] 5. The purified aluminum liquid flows from the outlet of the tank into the next process (such as the filter box or casting nozzle).

[0013] The aforementioned slag removal operation typically utilizes a ceramic perforated plate. The outlet of the aforementioned tank is generally normally open. By adjusting the addition rate of the aluminum liquid to be degassed, the degassed intensity, the heating intensity, the stirring intensity, the slag removal intensity, and the discharge rate of the purified aluminum liquid, the degassed operation can be continuously carried out, thus corresponding to the meaning of the aforementioned "continuous casting and rolling."

[0014] For example, the invention patent application with publication number CN 121183126 A and publication date of December 23, 2025 discloses a degassing box for casting and rolling production. Its main structural components include: a degassing box body, a support frame, an air storage box, a first air pump, a conveying pipe, a permeable brick, a heater, a heat exchange pipe, a connecting pipe, and a second air pump.

[0015] The degassing box in this patent application has the following advantages and functions: the aluminum liquid heats the heat exchange pipe to achieve the purpose of gas preheating, thereby reducing the degree of aluminum liquid solidification caused by the low gas temperature.

[0016] However, in actual use, this degassing box still suffers from at least the following inefficiencies and impracticalities regarding the inert gas injection operation:

[0017] First, its permeable brick structure can only provide a relatively inefficient and passive shearing and refining effect for the inert gas being sheared. At the same time, its agitator structure is difficult to further break up the relatively continuous inert gas, which ultimately leads to the inert gas bubbles in the molten aluminum being too large and the degassing efficiency being reduced.

[0018] Secondly, the heat exchange pipe structure itself has relatively large dimensions and requires relatively high-quality pipe materials. Generally, it needs to use high-temperature resistant ceramic materials that are the same as those used in the stirring structure. Therefore, it will significantly reduce the effective volume of the degassing box and increase the operating cost of the entire gas preheating operation. Ultimately, it will also reduce the efficiency of the entire degassing and slag removal operation and reduce the practicality of the degassing box. Summary of the Invention

[0019] This application provides an aeration and stirring composite component, the technical problem to be solved by which is to enable the degassing and slag removal operation in the continuous casting and rolling process of aluminum or aluminum alloy to have both sufficient bubble shearing and refining function and economical and practical inert gas preheating function.

[0020] In addition, this application also provides a degassing box for casting and rolling production, including the above-mentioned aeration and stirring composite component.

[0021] The technical solution adopted by this application to solve the above problems is: an aeration and stirring composite assembly, the structure of which includes a slotted composite central shaft unit for connecting an inert gas generator at the upper end, a perforated stirring tube unit disposed on the slotted composite central shaft unit and protruding radially outward for approaching the aeration position and the annular heater, a support ring disposed on the slotted composite central shaft unit and located below the perforated stirring tube unit, and an inclined plate for compensating for the height difference between the perforated stirring tube unit and the support ring respectively at the upper and lower ends.

[0022] A further preferred technical solution is that the slotted composite central shaft unit includes a vertical shaft with the support ring on the annular surface, an air filling groove on the upper end surface of the vertical shaft, and an air filling hole disposed between the air filling groove and the annular surface of the vertical shaft and used to connect the perforated stirring tube unit.

[0023] A further preferred technical solution is that the perforated stirring tube unit includes an inclined tube section with one end connected to the air inlet and the other end relatively lower, a vertical tube section with the upper end connected to the inclined tube section and the lower end sealed by the height difference compensation plate, and an air outlet provided on the vertical tube section with the opening direction facing the annular heater.

[0024] A further preferred technical solution is that the slotted composite central shaft unit also includes a push-pull ring disposed on the annular surface of the vertical shaft and located above the perforated stirring tube unit, which increases the distance between the lower end face of the vertical shaft and the bottom discharge port by vertically lifting the vertical shaft, thereby increasing the discharge speed of the molten aluminum.

[0025] A further preferred technical solution is that the structure of the composite component also includes a sliding opening provided on the inclined plate for height difference compensation, and a discharge pusher plate that is inserted into the sliding opening and moves closer to the side discharge port by increasing the rotational speed of the slotted composite central shaft unit to increase the discharge speed of the molten aluminum.

[0026] A further preferred technical solution is that the structure of the composite component also includes an anti-fall limiting block disposed on the upper end surface of the discharge pusher plate and used to abut against the inclined upper surface of the height difference compensation plate.

[0027] A further preferred technical solution is that the structure of the composite component further includes a limiting ring sleeved on the vertical shaft and located above the inclined pipe section, used to block and limit the inclined pipe section, and a transverse round rod disposed on the limiting ring, connected to the housing, and used to sleeve and install the rotating orifice plate for slag removal.

[0028] One end of the inclined pipe section is inclined downwards, thereby providing rotational space for the rotating orifice plate used for slag removal.

[0029] A further preferred technical solution is that the structure of the composite component further includes a fixed ring sleeved on the slotted composite central shaft unit and used to abut against the lower surface of the support ring, and an inclined connecting plate disposed on the inner bottom surface of the housing, connected to the fixed ring, and used to provide rotation space for the discharge pusher plate.

[0030] A further preferred technical solution is that: the number of push-pull rings is 3, and a graphite packing is provided between the two upper push-pull rings to be sleeved with the vertical shaft and used for sealing connection of the inert gas generator, and a rotation drive ring is provided between the two lower push-pull rings to be sleeved with the vertical shaft.

[0031] A degassing box for casting and rolling production includes the aforementioned aeration and stirring composite component.

[0032] The beneficial effects of this application include at least the following six points.

[0033] First, in this composite component, the perforated stirring tube unit is connected to both the inert gas generator and the external drive mechanism, thus enabling it to have both gas injection and rotation stirring functions. The perforated stirring tube unit can relatively directly and frequently impact and cut bubbles, ultimately improving the efficiency of hydrogen removal and inclusion removal in the inert gas injection operation.

[0034] Secondly, in this composite component, the position where the inert gas first contacts the molten aluminum corresponds to the area where the vertical pipe section rotates. This area is aligned vertically with the annular heater and radially close to the annular heater, and the gas outlet faces the annular heater. As a result, the high temperature phenomenon in the molten aluminum area corresponding to the annular heater can not only be alleviated and balanced, but the excess heat can also be used to preheat the bubbles. Ultimately, this can significantly alleviate the solidification phenomenon of molten aluminum caused by the low temperature of the inert gas.

[0035] Third, in this composite component, the slotted composite central shaft unit is installed by inserting the upper and lower ends, which, together with the push-pull ring, makes its height adjustable, thereby adjusting the distance between the lower end face of the vertical shaft and the bottom discharge port, ultimately making the aluminum liquid discharge speed adjustable.

[0036] Correspondingly, the discharge pusher plate can also adjust the rotation speed of the slotted composite central shaft unit, which ultimately adjusts the discharge speed of the aluminum liquid from the degassing box with the side discharge port, making the adjustable aluminum liquid discharge speed function of this component both efficient and versatile.

[0037] Among them, the discharge pusher plate can also increase the overall stirring intensity of the composite component; the two methods of increasing the discharge speed of aluminum liquid mentioned above are relatively independent, and when the vertical axis is lifted, it can be further closer to the discharge pusher plate and the side discharge port. Therefore, if the two methods are used at the same time, the former will have a synergistic effect on the latter, and it is even more impossible for the discharge speed at one discharge port to increase while the discharge speed at the other discharge port decreases.

[0038] Correspondingly, it is permissible to have both a bottom discharge port and a side discharge port on the box.

[0039] Fourth, in this composite component, the horizontal round rod combined with the inclined pipe section can provide sufficient rotation space for the rotating orifice plate used for slag removal; the inclined connecting plate also provides a safe space for the rotation of the pusher plate used for material feeding by its own inclination, ultimately ensuring that the slag removal operation and the aluminum liquid discharge speed adjustment operation are both safe and effective.

[0040] Fifth, in this composite component, the inclined pipe section serves at least the following three functions:

[0041] A. The blocking and limiting ring restricts the maximum upward range of the slotted composite central shaft unit, preventing the aluminum liquid discharge speed adjustment operation at the bottom outlet from causing the slotted composite central shaft unit to lose its limiting function and fall.

[0042] B. Connect the inert gas generator and the gas outlet to ensure the effectiveness of the gas filling operation;

[0043] C. Its own inclination provides sufficient and safe vertical space for the rotating orifice plate used for slag removal to rotate.

[0044] Sixth, in this composite component, the inclined plate used to compensate for height differences must serve at least the following three functions:

[0045] A. In order to ensure that the box itself has a large structural strength and that the heating operation of the ring heater has the advantage of relatively high efficiency, the vertical dimension of the ring heater must be smaller than the vertical dimension of the box, and the ring heater is centered in the box in the vertical direction.

[0046] Therefore, in order to fully correspond to and align with the annular heater, the vertical dimension of the vertical pipe section is also smaller than that of the housing. Finally, the height difference is compensated for by a ramp, which fills the height difference between the lower end of the vertical pipe section and the support ring, allowing for an effective connection between the two.

[0047] B. Provide a reset function for the pusher plate to leave the side discharge port, so that the pusher plate's function of accelerating the discharge of aluminum liquid can be turned on and off as needed;

[0048] C. Seal the lower end of the vertical pipe section to ensure that all inert gas is discharged through the vent and that all inert gas can be fully heated.

[0049] Seventh, for the entire degassing box used in casting and rolling production, this composite component has outstanding versatility, for example, it is suitable for common ring heaters; the aluminum liquid discharge speed adjustment function is applicable to boxes with bottom discharge ports or side discharge ports. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the structure of the aeration and stirring composite component in this application.

[0051] Figure 2 This is a schematic diagram showing the installation location of the aerated mixing composite component in this application.

[0052] Figure 3 This is a schematic diagram of the positional structure of the slotted composite central shaft unit in this application.

[0053] Figure 4 This is a schematic diagram of the perforated stirring tube unit in this application.

[0054] Figure 5 This is a schematic diagram illustrating the usage of the material discharge pusher plate in this application.

[0055] Figure 6 This is a schematic diagram showing the position and shape of the pusher plate used for discharging material in this application.

[0056] Figure 7 This is a schematic diagram showing the position of the rotating orifice plate for slag removal in this application.

[0057] Figure 8 This is a schematic diagram showing the position and shape of the fixed ring in this application.

[0058] Figure 9 In this application, if the vertical dimension of the annular heater is relatively large, it is not possible to set a structural diagram of the side discharge port.

[0059] Figure 10 This is a schematic diagram illustrating the state in this application where the vertical axis is lifted upward by the push-pull ring, thereby increasing the discharge speed of molten aluminum at the bottom outlet.

[0060] The meanings of the markings in the diagram are as follows.

[0061] 1. Slotted composite central shaft unit; 2. Perforated stirring tube unit; 3. Support ring; 4. Inclined plate for height difference compensation; 5. Sliding opening; 6. Pushing plate for discharge; 7. Anti-fall limit block; 8. Limiting ring; 9. Horizontal round rod; 10. Fixing ring; 11. Inclined connecting plate; 12. Graphite packing; 13. Rotation drive ring.

[0062] Vertical shaft 101, air filling groove 102, air filling hole 103, push-pull ring 104;

[0063] Inclined pipe section 201, vertical pipe section 202, air outlet 203;

[0064] Inert gas generator a, ring heater b, bottom outlet c, side outlet d, housing e, rotating orifice plate for slag removal f;

[0065] Liquid level g, low-speed discharge position h, high-speed discharge position k. Detailed Implementation

[0066] The following description is merely a preferred embodiment of this application and is not intended to limit the scope of this application.

[0067] As attached Figure 1 -Appendix Figure 10 As shown, an aeration and stirring composite assembly includes a slotted composite central shaft unit 1 for connecting an inert gas generator a at its upper end; a perforated stirring tube unit 2 disposed on the slotted composite central shaft unit 1 and protruding radially outward for approaching the aeration position and the annular heater b; a support ring 3 disposed on the slotted composite central shaft unit 1 and located below the perforated stirring tube unit 2; and an inclined plate 4 for compensating for the height difference between the perforated stirring tube unit 2 and the support ring 3, with the upper and lower ends respectively connecting the perforated stirring tube unit 2 and the support ring 3.

[0068] In this embodiment, the main material of the composite component is high-purity graphite or silicon nitride / silicon carbide ceramic, thereby avoiding metal contamination of the molten aluminum.

[0069] Specifically, the composite component comprises, for example, one slotted composite central shaft unit 1, three perforated stirring tube units 2, one support ring 3, and three inclined plates 4 for height difference compensation. The perforated stirring tube units 2 and the inclined plates 4 for height difference compensation are each evenly spaced in the circumferential direction, and these four components are integrally formed.

[0070] Among them, the inert gas generator a is a common commercially available product. The inner ring surface of its inert gas output pipe and the outer ring surface of the slotted composite central shaft unit 1 are properly sealed to ensure that the slotted composite central shaft unit 1 has both low-resistance rotation function and sufficient gas sealing function.

[0071] The basic principle of the degassing and slag removal function of this composite component is as follows: inert gas passes sequentially through inert gas generator a, slotted composite central shaft unit 1, and perforated stirring tube unit 2, and finally enters the aluminum liquid, thus ensuring the effectiveness of the basic degassing and slag removal function.

[0072] The reason why this composite component has the advantage of sufficient bubble shear refinement is mainly due to:

[0073] First, the initial contact point between the inert gas and the molten aluminum is on the perforated stirring tube unit 2, which is rotating at high speed. At this point, there is already a relatively large speed difference between the bubbles and the molten aluminum. Compared with the existing common method of statically inputting inert gas, this method can make the bubbles formed at the beginning relatively small.

[0074] Secondly, the bubbles formed at the beginning are largely integrated with the rotation area of ​​the perforated stirring tube unit 2. Therefore, the perforated stirring tube unit 2 can also impact and cut the bubbles, further reducing their size and achieving the above-mentioned shearing and refining function, which ultimately helps to improve the efficiency of degassing and slag removal operations.

[0075] Finally, the main reason why this composite component has the economic and practical advantages of inert gas preheating is that:

[0076] First, the temperature of the molten aluminum in the annular area near the installation position of the annular heater b is higher than that of the molten aluminum in the other areas of the box e. This temperature difference is not conducive to the overall degassing and slag removal performance. However, the moving bubbles can effectively alleviate this temperature difference and ultimately improve the degassing and slag removal efficiency.

[0077] Secondly, the location where the inert gas first comes into contact with the molten aluminum corresponds to the relatively high temperature annular area mentioned above. The heat absorption effect of the inert gas itself can also alleviate the harmful temperature difference phenomenon mentioned above.

[0078] Third, the solidification of molten aluminum mainly occurs in the initial stage of contact between molten aluminum and gas. This contact point is also the relatively high-temperature annular region mentioned above. At this time, the relatively high temperature conditions can both quickly preheat the gas and fully remelt the already formed solidified molten aluminum block, ultimately significantly alleviating the solidification phenomenon of molten aluminum.

[0079] The slotted composite central shaft unit 1 includes a vertical shaft 101 with the support ring 3 on its annular surface, an air filling groove 102 on the upper surface of the vertical shaft 101, and an air filling hole 103 between the air filling groove 102 and the annular surface of the vertical shaft 101, which is used to connect the perforated stirring tube unit 2.

[0080] In this embodiment, the vertical shaft 101 is a circular shaft, and the vertical depth of the aeration groove 102 is 10-20% of the length of the vertical shaft 101. The number and position of the aeration holes 103 correspond to the perforated stirring tube unit 2.

[0081] The perforated stirring tube unit 2 includes an inclined tube section 201 with one end connected to the air inlet 103 and the other end relatively lower, a vertical tube section 202 with the upper end connected to the inclined tube section 201 and the lower end blocked by the inclined plate 4 for height difference compensation, and an air outlet 203 provided on the vertical tube section 202 with the opening direction facing the annular heater b.

[0082] In this embodiment, if the vertical dimension of the annular heater b is relatively large, for example, 80-90% of the vertical dimension of the housing e, the resulting hazards mainly include the following two:

[0083] First, the interior of housing e needs to provide a relatively large annular groove for the annular heater b, which will greatly reduce the structural strength of housing e.

[0084] Secondly, the side discharge port d on the box e is difficult to open, as there is not enough vertical space required for installation.

[0085] Therefore, generally, vertically, the annular heater b is centrally located within the housing e, and its vertical dimension is 50-60% of the vertical dimension of housing e. Correspondingly, the position and length of the vertical pipe section 202 correspond to the annular heater b, thereby achieving a direct and efficient inert gas preheating effect. Ultimately, this is the main reason why the inclined pipe section 201 and the inclined plate 4 for height difference compensation are needed.

[0086] On the other hand, the opening direction of the air outlet 203 is towards the annular heater b, which can further improve the preheating efficiency of the annular heater b for inert gas.

[0087] Furthermore, when the composite component is in normal use, the position of the liquid level g is higher than that of the inclined pipe section 201, or the inclined pipe section 201 passes through the liquid level g.

[0088] The slotted composite central shaft unit 1 also includes a push-pull ring 104 disposed on the annular surface of the vertical shaft 101 and above the perforated stirring tube unit 2, which increases the distance between the lower end face of the vertical shaft 101 and the bottom discharge port c by vertically lifting the vertical shaft 101, thereby increasing the discharge speed of the aluminum liquid.

[0089] In this embodiment, it is precisely because the upper end of the vertical shaft 101 is connected to the inert gas generating device a that the vertical shaft 101 can move up and down appropriately while rotating.

[0090] Therefore, both the bottom discharge port c and the vertical shaft 101 are located at the center of the housing e. The vertical shaft 101 is directly above the bottom discharge port c. When the vertical shaft 101 is relatively lifted, the obstruction strength at the bottom discharge port c is reduced, which can increase the discharge speed at the bottom discharge port c. Conversely, if the lower end face of the vertical shaft 101 is close to the bottom discharge port c, the discharge speed at the bottom discharge port c can be reduced.

[0091] The vertical shaft 101 can be raised and lowered as needed by installing a vertical cylinder, a vertical suspension rope, or other means at the push-pull ring 104.

[0092] However, the following two points also need special attention.

[0093] Firstly, generally, during the degassing and slag removal process, the slotted composite central shaft unit 1 is not raised or lowered. Instead, during the intervals between operations, the vertical distance between the lower end face of the vertical shaft 101 and the bottom discharge port c is adjusted and set. The main reference indicator for this adjustment is the cleanliness of the aluminum liquid to be treated. When there is a relatively high amount of hydrogen and inclusions in the aluminum liquid, the vertical shaft 101 can be lowered appropriately to improve the degree of degassing and slag removal through slow discharge.

[0094] Secondly, it is precisely because the vertical shaft 101 has the need for lifting and adjusting that the installation end of the inclined pipe section 201 needs to be tilted upwards and tilted itself appropriately. This is so that the blocking and limiting effect on the limiting ring 8 can be triggered relatively early, and the lower end of the vertical shaft 101 can be prevented from separating from the fixed ring 10. This is also one of the main reasons why the inclined pipe section 201 is tilted.

[0095] The structure of the composite component also includes a sliding opening 5 provided on the inclined plate 4 for height difference compensation, and a discharge pusher plate 6 that is inserted into the sliding opening 5 and moves closer to the side discharge port d by increasing the rotation speed of the slot composite central shaft unit 1 to increase the discharge speed of aluminum liquid.

[0096] In this embodiment, the material discharge pusher plate 6 is rectangular in shape, and the height difference compensation inclined plate 4, together with the sliding opening 5, is in an inclined state.

[0097] When the discharge pusher plate 6 is located at the lowest point of the sliding opening 5, the height of the side discharge port d is higher than that of the discharge pusher plate 6, and the distance between them is at its maximum. At this time, by appropriately increasing the rotation speed of the slotted composite central shaft unit 1, the discharge pusher plate 6 can be moved vertically upward and radially outward, thereby increasing the strength of the aluminum liquid pushing the discharge pusher plate 6 at the side discharge port d, and ultimately increasing the discharge speed.

[0098] On the other hand, the relatively high viscosity of the molten aluminum can appropriately slow down the moving speed of the discharge pusher plate 6, avoiding collision and damage between the discharge pusher plate 6 and the height difference compensation inclined plate 4.

[0099] Furthermore, this composite component is also suitable for housing e that simultaneously has a bottom discharge port c and a side discharge port d. More importantly, the lifting action at the vertical axis 101 can also be appropriately moved closer to the discharge pusher plate 6 and the side discharge port d, so that the discharge speed adjustment methods at the bottom discharge port c and the side discharge port d not only do not conflict, but also have an additional benefit.

[0100] Finally, the aluminum molten material discharge speed adjustment function can also be adjusted and matched to the degassing and slag removal operation of the aluminum molten material. Generally, when the gas content and slag content of the aluminum molten material undergoing degassing and slag removal are relatively high, the aluminum molten material discharge speed can be reduced to make the degassing and slag removal operation as thorough and complete as possible.

[0101] The structure of the composite component also includes an anti-fall limit block 7 disposed on the upper end surface of the discharge pusher plate 6 and used to abut against the inclined upper surface of the height difference compensation ramp 4.

[0102] In this embodiment, the anti-fall limiting block 7 is also rectangular in shape, and its length and width are greater than the length and width of the sliding opening 5, thereby preventing the material discharge pusher 6 and the height difference compensation inclined plate 4 from separating.

[0103] The structure of the composite component also includes a limiting ring 8 sleeved on the vertical shaft 101 and located above the inclined pipe section 201, used to block and limit the inclined pipe section 201; and a transverse round rod 9 disposed on the limiting ring 8, connected to the housing e, and used to sleeve and install the rotating orifice plate f for slag removal.

[0104] One end of the inclined pipe section 201 is inclined downward, thereby providing a rotation space for the rotating orifice plate f for slag removal.

[0105] In this embodiment, at least one transverse circular rod 9 is provided on the limiting ring 8, and at least two radial connection structures are provided between the limiting ring 8 and the housing e. (See attached diagram) Figure 7 As shown, the limiting ring 8 can be fully fixed by one transverse circular rod 9 and two radial connecting plates.

[0106] In addition, the function of the limiting ring 8 mainly includes the following two aspects.

[0107] First, it is sleeved with the upper part of the vertical shaft 101 to reduce the lateral swing amplitude when the slotted composite central shaft unit 1 rotates, thereby improving the accuracy of the rotation action.

[0108] Second, when the vertical shaft 101 needs to be raised for adjustment, the inclined tube section 201 is blocked to prevent the vertical shaft 101 from separating from the fixed ring 10.

[0109] Correspondingly, the transverse round rod 9 can connect the limiting ring 8 and the box e, and can also be fitted with the rotating orifice plate f for slag removal, making the rotary slag removal method simple and efficient.

[0110] The structure of the composite component also includes a fixed ring 10 sleeved on the slotted composite central shaft unit 1 and used to abut against the lower surface of the support ring 3, and an inclined connecting plate 11 disposed on the inner bottom surface of the housing e, connected to the fixed ring 10, and used to provide rotation space for the discharge pusher plate 6.

[0111] In this embodiment, the materials of the structures in contact with the molten aluminum are all graphite or ceramic, including, for example: a discharge pusher plate 6, an anti-fall limit block 7, a fixing ring 10, and an inclined connecting plate 11.

[0112] The fixing ring 10, the inclined connecting plate 11, and the inner lining structure of the box body e are integrally formed. The bottom outlet c is circular in shape, and the vertical projection of its center coincides with the vertical projection of the center of the fixing ring 10. There are 3-4 inclined connecting plates 11, which are used to fully fix the fixing ring 10.

[0113] The number of push-pull rings 104 is 3. Between the two upper push-pull rings 104, a graphite packing 12 is provided, which is sleeved with the vertical shaft 101 and used to seal the connection of the inert gas generator a. Between the two lower push-pull rings 104, a rotation drive ring 13 is provided, which is sleeved with the vertical shaft 101.

[0114] In this embodiment, the graphite packing 12 is a commercially available product, and its main function is to provide sufficient airtightness and relatively small sliding friction resistance between the inert gas generator a and the vertical shaft 101.

[0115] On the other hand, the push-pull ring 104 and the vertical shaft 101 are integrally formed, and the graphite packing 12 is wound around the vertical shaft 101. The rotation drive ring 13 is, for example, two half-rings, which are screwed on themselves and then screwed or snapped onto the vertical shaft 101, thereby enabling: 1. The rotation drive ring 13 to be effectively assembled and disassembled; 2. The rotation drive ring 13 to effectively drive the vertical shaft 101 to rotate together.

[0116] Correspondingly, another function of the push-pull ring 104 is to fully fix the graphite packing 12 and the rotation drive ring 13 in the vertical direction.

[0117] A degassing box for casting and rolling production includes the aforementioned aeration and stirring composite component.

[0118] In this embodiment, the degassing box is specifically composed of, for example, an inert gas generator a, an annular heater b, a box body e, 1-3 rotating perforated plates f for slag removal, and the aforementioned aeration and stirring composite assembly.

[0119] The housing e can be a conventional cylindrical internal cavity. The aeration and stirring composite assembly can also be used with a drive motor, a vertical cylinder, and a controller, so that the vertical height and rotation speed of the vertical shaft 101 can be adjusted as needed.

[0120] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this application. These are non-inventive modifications and are protected by patent law as long as they are within the scope of the claims of this application.

Claims

1. An aerated mixing composite component, characterized in that: The structure includes a slotted composite central shaft unit (1) for connecting an inert gas generator (a) at the upper end, a perforated stirring tube unit (2) disposed on the slotted composite central shaft unit (1) and protruding radially outward for approaching the gas filling position and the annular heater (b), a support ring (3) disposed on the slotted composite central shaft unit (1) and located below the perforated stirring tube unit (2), and an inclined plate (4) for compensating for the height difference between the perforated stirring tube unit (2) and the support ring (3) respectively.

2. The aeration and stirring composite component according to claim 1, characterized in that: The slotted composite central shaft unit (1) includes a vertical shaft (101) with the support ring (3) on the annular surface, an air filling groove (102) on the upper end surface of the vertical shaft (101), and an air filling hole (103) between the air filling groove (102) and the annular surface of the vertical shaft (101) for connecting the perforated stirring tube unit (2).

3. The aeration and stirring composite component according to claim 2, characterized in that: The perforated stirring tube unit (2) includes an inclined tube section (201) with one end connected to the air inlet (103) and the other end relatively lower, a vertical tube section (202) with the upper end connected to the inclined tube section (201) and the lower end blocked by the inclined plate (4) for height difference compensation, and an air outlet (203) provided on the vertical tube section (202) with the opening direction facing the annular heater (b).

4. The aeration and stirring composite component according to claim 2, characterized in that: The slotted composite central shaft unit (1) also includes a push-pull ring (104) disposed on the annular surface of the vertical shaft (101) and located above the perforated stirring tube unit (2), which increases the distance between the lower end face of the vertical shaft (101) and the bottom outlet (c) by vertically lifting the vertical shaft (101) to increase the aluminum liquid discharge speed.

5. The aeration and stirring composite component according to claim 1, characterized in that: It also includes a sliding opening (5) provided on the inclined plate (4) for height difference compensation, and a discharge pusher plate (6) for increasing the discharge speed of aluminum liquid by inserting into the sliding opening (5) and moving closer to the side discharge port (d) by increasing the rotation speed of the slot composite central shaft unit (1).

6. The aeration and stirring composite component according to claim 5, characterized in that: It also includes a fall prevention limiting block (7) disposed on the upper end surface of the discharge pusher plate (6) and used to abut against the inclined upper surface of the height difference compensation ramp (4).

7. The aeration and stirring composite component according to claim 3, characterized in that: It also includes a limiting ring (8) sleeved on the vertical shaft (101) and located above the inclined pipe section (201) for blocking and limiting the inclined pipe section (201), and a transverse round rod (9) disposed on the limiting ring (8), connected to the box body (e), and used for sleeved installation of the slag removal rotating orifice plate (f). One end of the inclined pipe section (201) is inclined downward, thereby providing a rotation space for the slag removal rotating orifice plate (f).

8. The aeration and stirring composite component according to claim 5, characterized in that: It also includes a fixed ring (10) sleeved on the slotted composite central shaft unit (1) and used to abut against the lower surface of the support ring (3), and an inclined connecting plate (11) set on the inner bottom surface of the box (e), connected to the fixed ring (10), and used to leave rotation space for the discharge pusher plate (6).

9. The aeration and stirring composite component according to claim 4, characterized in that: The number of push-pull rings (104) is 3. Between the two upper push-pull rings (104), there is a graphite packing (12) that is sleeved with the vertical shaft (101) and used to seal the connection of the inert gas generator (a). Between the two lower push-pull rings (104), there is a rotation drive ring (13) that is sleeved with the vertical shaft (101).

10. A degassing box for casting and rolling production, characterized in that: The structure includes the aeration and stirring composite component as described in any one of claims 1-9.

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