Aluminum melt refining modification treatment device

Abstract

The invention belongs to the technical field of aluminum melt refining, and particularly relates to an aluminum melt refining modification treatment device which comprises a degassing box, the degassing box comprises a box body, a liquid inlet pipe and a liquid outlet pipe, a partition plate is rotationally connected into the box body, and the partition plate divides the box body into two cavities used for controlling the flowing path of molten aluminum; the inner cavity of the box body is dynamically divided into two independent cavities through the partition plate capable of rotating in the box body, and the generator in any cavity is isolated and overhauled by combining valve control of the liquid inlet pipe and the liquid outlet pipe; when the generator in any cavity needs to be overhauled, molten aluminum in the cavity where the faulted generator is located can be emptied, and the other cavity continues to conduct refining operation; the whole-line shutdown maintenance is changed into local and online maintenance, the shutdown time and energy waste caused by maintenance are reduced, oxidation and residual loss of molten aluminum are remarkably reduced, and the equipment utilization rate and the production economy are improved.

Description

Technical Field

[0001] This invention belongs to the field of aluminum melt refining technology, specifically an aluminum melt refining and modification treatment device. Background Technology

[0002] Refining of molten aluminum is a crucial step in the aluminum alloy production process. Its main purpose is to remove hydrogen, inclusions, and other harmful elements from the molten aluminum, thereby improving the mechanical properties and metallurgical quality of the aluminum material. Traditional molten aluminum processing technologies mainly include gas flotation and flux methods, among which purification technology based on inert gas injection is widely used due to its environmental friendliness and high efficiency.

[0003] Chinese patent CN104818392A discloses an aluminum melt purification and refining device, which includes a degassing chamber and a main controller. The bottom of the degassing chamber is equipped with an inert gas input device, and the top of the degassing chamber is equipped with a vacuum pump. Both the inert gas input device and the vacuum pump are connected to the degassing chamber. Both the inert gas input device and the vacuum pump are electrically connected to the main controller. The degassing chamber has an aluminum melt inlet and an aluminum melt outlet on both sides, located at the bottom of the degassing chamber. A laser rangefinder sensor is electrically connected to the aluminum melt inlet of the degassing chamber, and the laser rangefinder sensor is electrically connected to the main controller.

[0004] In the current technology, although the inert gas input device disclosed in the prior art adopts a bottom-mounted graphite rotor, which will not cause oxidation wear and extend the service life of the rotor, there are still many defects in practical applications, including: difficult inspection and maintenance. Although the bottom-mounted rotor can avoid oxidation to a certain extent, it has major drawbacks when maintenance is required. For example, when the rotor or related components fail, all the aluminum liquid in the degassing box must be completely emptied, resulting in long downtime, energy waste and metal loss.

[0005] The entire process of draining molten aluminum, cooling, maintenance, and reheating takes several hours. Before resuming work, the degassing box needs to be reheated to above 470°C, and the molten aluminum is oxidized and wasted during the draining process.

[0006] Therefore, the present invention provides an apparatus for refining and modifying aluminum melt. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0008] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides an aluminum melt refining and modification treatment device, which includes a degassing box. The degassing box includes a box body, an inlet pipe and an outlet pipe. The inlet pipe and the outlet pipe are both connected to the bottom of the box body and are used to control the inflow and outflow of aluminum melt. The inlet pipe and the outlet pipe are arranged in a centrally symmetrical manner.

[0009] A partition is rotatably connected inside the box, which divides the box into two chambers to control the flow path of the molten aluminum. A docking part is fixed to the top of the box, and an overflow groove is opened on the side wall of the docking part relative to the partition for the overflow of molten aluminum.

[0010] It also includes a drive shaft and a generator. Two generators are centrally symmetrically fixed to the bottom of the box for refining and modifying the molten aluminum. The drive shaft is rotatably connected to the bottom of the box for driving the partition to rotate inside the box.

[0011] Preferably, two centrally symmetrically arranged first stop blocks and second stop blocks are fixed to the inner side of the box to restrict the movement of the partition; one set of first stop blocks and second stop blocks are arranged adjacent to the inlet pipe, and another set of first stop blocks and second stop blocks are arranged adjacent to the outlet pipe.

[0012] Preferably, the partition has a contact portion at its end relative to the inner wall of the box, the contact portion cooperating with a first stop block or a second stop block to separate two chambers; the contact portion of the partition is made of a sealing material to control the isolation and sealing between the two chambers.

[0013] Preferably, the docking part is configured as an X-shaped structure, and the docking part can correspond to the partition whose position can be changed; the top of the drive shaft passes through the center of the docking part, and the top of the drive shaft is rotatably connected inside the docking part.

[0014] Preferably, the generator includes a flange seat, a rotor, and a stator; the flange seat is provided with a liquid inlet and a transfer chamber for guiding the molten aluminum into the rotor to complete the initial mixing; the rotor can rotate within the flange seat and rotates relative to the stator; the bottom of the stator is connected to an inert gas injection pipe, and a gas channel is opened inside the stator for injecting inert gas for refining.

[0015] Preferably, the rotor has a cavity, which is stepped and includes a first step, a second step and a third step, for gradually crushing the inert gas.

[0016] The inert gas is transported to the cavity inside the rotor through the gas channel inside the stator. A liquid outlet is provided on the middle side wall of the rotor to discharge the aluminum liquid that has come into contact with and mixed with the inert gas. A siphon is provided on the bottom side wall of the rotor, and the siphon is located in the transfer cavity. A first annular boss and a second annular boss are fixed to the top of the stator to cooperate with the stepped cavity to break up the inert gas.

[0017] Preferably, the first annular boss and the second annular boss are disposed on the outer periphery of the stator and are arranged at intervals; the first annular boss is disposed at the first step corner in the cavity, and the second annular boss is disposed at the second step corner in the cavity, and the gap between the first annular boss and the first step corner is smaller than the gap between the second annular boss and the second step corner, so as to generate a fine air curtain.

[0018] Preferably, it also includes a laser rangefinder sensor for monitoring changes in the liquid level inside the tank.

[0019] Preferably, the drive shaft is driven by a servo motor; it also includes a main controller, which is electrically connected to the laser rangefinder and the servo motor.

[0020] Preferably, it also includes a vacuum pumping device and an inert gas input device. The vacuum pumping device is connected to the top of the housing to maintain a negative pressure environment. The inert gas input device is used to connect to the inert gas injection pipe of the stator and supply gas to the inside of the generator.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The aluminum melt refining and modification treatment device of the present invention dynamically divides the internal cavity of the box into two independent chambers by a rotatable partition inside the box. Combined with the control of inlet and outlet pipe valves, the generator in either chamber can be isolated for maintenance. When the generator in either chamber needs maintenance, the aluminum liquid in the chamber where the faulty generator is located can be drained, while the other chamber continues refining operations. This transforms full-line shutdown maintenance into partial, online maintenance, reducing downtime and energy waste caused by maintenance, and significantly reducing the oxidation and residual loss of aluminum liquid, thereby improving equipment utilization and production economy.

[0023] 2. The aluminum melt refining and modification treatment device of the present invention, through the coordinated work of the baffle and the top-mounted overflow groove docking part, can force the aluminum liquid to form a directional flow path of liquid inlet → overflow → liquid outlet during the refining process; effectively prolonging the refining residence time of the aluminum liquid in the tank, ensuring sufficient contact between the aluminum liquid and the inert gas microbubbles; at the same time, the generator is integrated on the flange seat, when the generator in any chamber fails, the faulty generator can be removed under the control of the baffle and valve, realizing easy replacement of the faulty generator. Even if a generator fails suddenly, the generator to be repaired can be quickly isolated based on the action of the baffle and the valve, and degraded operation can be used to reserve time for planned maintenance and improve availability. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a perspective view of the present invention;

[0026] Figure 2 This is a top view of the present invention;

[0027] Figure 3 yes Figure 2 Sectional view at point AA;

[0028] Figure 4 yes Figure 2 Sectional view at point BB;

[0029] Figure 5 yes Figure 4 Enlarged diagram of point I in the diagram;

[0030] Figure 6 This is a schematic diagram of the fit between the rotor and the stator in this invention;

[0031] Figure 7 This is a schematic diagram of the fit between the partition and the docking part in this invention;

[0032] Figure 8 This is a perspective view of the generator in this invention;

[0033] Figure 9 This is a schematic diagram showing the position of the baffle during the aluminum liquid filling and refining process in this invention;

[0034] Figure 10 This is a schematic diagram showing the location of the generator maintenance partition in this invention;

[0035] In the diagram: 1. Degassing box; 11. Box body; 111. First stop block; 112. Second stop block; 12. Liquid inlet pipe; 13. Liquid outlet pipe; 2. Partition plate; 21. Contact part; 3. Connecting part; 31. Overflow groove; 4. Drive shaft; 5. Generator; 51. Flange seat; 511. Liquid inlet; 512. Transfer chamber; 52. Rotor; 521. Liquid outlet; 522. First step; 523. Second step; 524. Third step; 53. Stator; 531. Inert gas injection pipe; 532. Gas passage; 533. First annular boss; 534. Second annular boss. Detailed Implementation

[0036] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0037] like Figures 1 to 10 As shown in the figure, an aluminum melt refining and modification treatment device according to an embodiment of the present invention includes a degassing box 1. The degassing box 1 includes a box body 11, an inlet pipe 12 and an outlet pipe 13. The inlet pipe 12 and the outlet pipe 13 are both connected to the bottom of the box body 11 and are used to control the inflow and outflow of aluminum melt. The inlet pipe 12 and the outlet pipe 13 are arranged in a centrally symmetrical manner.

[0038] A partition 2 is rotatably connected inside the box 11, which divides the box 11 into two chambers for controlling the flow path of the molten aluminum. A docking part 3 is fixedly connected to the top of the box 11, and an overflow groove 31 is provided on the side wall of the docking part 3 relative to the partition 2 for the overflow of molten aluminum.

[0039] It also includes a drive shaft 4 and a generator 5. Two generators 5 are provided and are centrally symmetrically fixed to the bottom of the box 11 for refining and modifying the aluminum liquid. The drive shaft 4 is rotatably connected to the bottom of the box 11 for driving the partition 2 to rotate inside the box 11.

[0040] In the prior art, the defects that may exist in the process of refining molten aluminum by the lower rotor 52 include difficulty in inspection and maintenance. Although the lower rotor 52 can avoid oxidation to a certain extent, it has significant drawbacks when maintenance is required. For example, when the rotor 52 or related components fail, all the molten aluminum in the degassing box 1 must be completely emptied, resulting in long downtime, energy waste and metal loss.

[0041] In one embodiment of the present invention, when molten aluminum is filled into the tank 11 through the inlet pipe 12, the partition 2 is rotated to the desired position by an external servo motor. Figure 9In the state shown in -a, the molten aluminum entering the tank 11 through the inlet pipe 12 can be rapidly filled to both sides of the partition 2 based on the obstruction of the partition 2, so that the molten aluminum quickly reaches the expected liquid level. During this process, the valve of the inlet pipe 12 remains open, and the valve of the outlet pipe 13 remains closed. Subsequently, the partition 2 is driven to reset to the state shown in the figure by the drive shaft 4. Figure 9 -b or Figure 9 At position -c, the box 11 is divided into two independent chambers by the partition 2, and the two generators 5 are placed in the two independent chambers respectively. After the expected liquid level is reached, the two generators 5 are started, and inert gas is introduced into the two chambers by the two generators 5. The gas comes into full contact with the aluminum liquid in the two chambers. Based on Sivartein's law, the hydrogen dissolved in the aluminum liquid will spontaneously diffuse from the high partial pressure area (inside the aluminum liquid) to the low partial pressure area (inside the inert bubble). The microbubbles provide a huge mass transfer area, which allows the hydrogen gas to diffuse rapidly into the bubbles and float to the liquid surface with the bubbles and escape. In addition, based on the flotation principle, non-metallic inclusions such as oxides in the aluminum liquid will be adsorbed on the surface of the bubbles and carried by the bubbles to the surface of the melt to form scum, which can be easily removed.

[0042] Among them, when partition 2 is in Figure 9 -b or Figure 9 At the position shown in -c, it can be understood that the partition 2 can separate the internal cavity of the housing 11. However, during the aluminum liquid filling stage, since the partition 2 is in the position shown in -c, it can be understood that the partition 2 can separate the internal cavity of the housing 11. Figure 9 As shown in position -a, the aluminum liquid levels in the two separated chambers should be consistent. Once the aluminum liquid level reaches the expected level, generator 5 is activated to inject inert gas into the aluminum liquid. Generator 5 agitates the inert gas, causing it to disperse and escape into the surrounding aluminum liquid, ensuring sufficient contact between the inert gas microbubbles and the aluminum liquid. When partition 2 is in position... Figure 9 -b or Figure 9 At position -c, the valve of inlet pipe 12 remains open, while the valve of outlet pipe 13 is also open. Due to the obstruction of partition 2, the molten aluminum that enters the tank 11 through inlet pipe 12 will preferentially enter one chamber, and after the molten aluminum level rises, it will enter another chamber through the overflow groove 31 at the bottom of the docking part 3. Figure 3 As indicated by the arrow, based on this, by utilizing the rotatable partition 2 within the box 11, the internal cavities of the box 11 can be separated, allowing the molten aluminum to be distributed in two chambers. This can significantly extend the residence time of the molten aluminum in the box 11 for refining, thereby achieving efficient removal of hydrogen dissolved in the molten aluminum and improved entrainment efficiency of oxides.

[0043] When any generator 5 malfunctions and needs to be repaired, sufficient operating space is required because generator 5 needs to be disassembled, lifted out for repair or replacement. Therefore, only after the aluminum liquid is drained can maintenance personnel approach and safely operate the connecting flanges, bolts and other components.

[0044] like Figure 10 As shown, the partition 2 can divide the internal chambers of the housing 11 into two independent chambers, and the two generators 5 are independently arranged in the two chambers. It is foreseeable that, as Figure 10 As shown in -a, when the generator 5 on the inlet pipe 12 malfunctions, the molten aluminum injected through the inlet pipe 12 directly enters the left chamber, while the right chamber is connected to the outlet pipe 13. At this time, closing the inlet pipe 12 valve and opening the outlet pipe 13 valve allows the molten aluminum in the right chamber to be discharged through the outlet pipe 13, emptying the right chamber and exposing the generator 5. Disassembly and repair of the generator 5 in the right chamber can then be performed without causing aluminum leakage. It is not necessary to empty all the molten aluminum in the housing 11; only the chamber containing the generator 5 needs to be emptied, shortening downtime and reducing costs. This avoids the waste of energy and metal. When one chamber is isolated for maintenance, the other chamber can maintain refining operations, allowing the refining process to continue operating at 50% capacity, thus avoiding a complete interruption of the production process. It is also understandable that, based on the partition 2 separating the box 11, complex emergency repairs are transformed into planned and standardized isolation operations. Through the physical isolation of valves and partition 2, safe working conditions are created for maintenance personnel. Even if a generator 5 experiences a sudden failure, the generator 5 to be repaired can be quickly isolated based on the action of partition 2 in conjunction with the valve, and degraded operation can be used to reserve time for planned maintenance and improve availability.

[0045] In addition, such as Figure 10 As shown in -b, when the generator 5 near the outlet pipe 13 fails, the inlet pipe 12 is connected to the right chamber. At this time, the valve of the inlet pipe 12 is closed, while the valve of the outlet pipe 13 is kept open. The aluminum liquid in the left chamber is gradually drained through the outlet pipe 13, exposing the generator 5 in the left chamber. This allows maintenance personnel to disassemble and repair the generator 5. When maintenance is required, after draining the corresponding chamber, the entire generator 5 can be lifted out of the housing 11 simply by removing the connecting bolts, enabling quick replacement.

[0046] Furthermore, based on the partition 2 separating the internal cavities of the housing 11 to form two independent chambers, the two independent chambers can be defined as different functional units based on the change in the position of the partition 2. For example, when the partition 2 rotates to such a position... Figure 9As shown in position -b, the right chamber can serve as a degassing and refining chamber, while the left chamber serves as a settling and clarifying chamber. After refining in the right chamber, the molten aluminum flows over the overflow trough 31 into the left chamber for settling, allowing minute inclusions to float to the surface and improving the purity of the molten aluminum. Furthermore, based on the rotatable nature of the partition 2, in the next cycle, the partition 2 can be rotated to... Figure 9 Position -c allows the functions of the left and right chambers to be swapped, preventing one chamber from being used as a static chamber for a long time, which would cause a large difference in the service life of the two generators 5.

[0047] like Figures 1 to 4 , Figure 9 , Figure 10 As shown, two centrally symmetrically arranged first stop blocks 111 and second stop blocks 112 are fixed to the inner side of the box 11 to restrict the movement of the partition 2; one set of first stop blocks 111 and second stop blocks 112 are arranged adjacent to the inlet pipe 12, and another set of first stop blocks 111 and second stop blocks 112 are arranged adjacent to the outlet pipe 13.

[0048] like Figure 9 , Figure 10 As shown, the internal chambers of the housing 11 are divided by the partition 2. When the partition 2 is rotatably controlled within the housing 11, as... Figure 9 As shown in -a, in this position, the partition 2 is located between the first stop block 111 and the second stop block 112. The molten aluminum that is filled into the tank 11 through the inlet pipe 12 is blocked by the partition 2 and splits into two flows. One flows to the side entering the partition 2, and the other flows to the other side entering the partition 2. During the filling process, the valve of the inlet pipe 12 remains open, and the valve of the outlet pipe 13 remains closed. The molten aluminum can be quickly filled into the tank 11. Since the two chambers are connected, the molten aluminum levels on both sides of the partition 2 are equal. When the molten aluminum reaches the expected level, the partition 2 is then rotated according to the drive shaft 4. Figure 9 The position of -b or 9-c, in Figure 9 In the state shown in Figure -b, with partition 2 in place, the end of partition 2 relative to the inner wall of housing 11 contacts the second stop block 112, forming an effective contact surface with the second stop block 112. Based on this contact surface, the two chambers are sealed and isolated. Figure 9 -c In the state of partition 2, the end of partition 2 relative to the inner wall of the box 11 will contact the first stop block 111 and form an effective contact surface with the first stop block 111, thereby achieving the sealing and isolation of the two chambers based on this contact surface.

[0049] It is worth noting that, in Figure 9 The arrows shown indicate the direction of the molten aluminum flow. Figure 9 The arrow shown in -a indicates that molten aluminum is injected into the tank 11 only through the inlet pipe 12. Figure 9The arrow in -b indicates that the molten aluminum preferentially enters the right chamber through the inlet pipe 12, then jumps to the left chamber through the overflow tank 31, and finally is discharged through the outlet pipe 13. Figure 9 -c The arrow in the diagram indicates that the molten aluminum enters the left chamber first through the inlet pipe 12, then jumps to the right chamber through the overflow trough 31, and finally is discharged through the outlet pipe 13.

[0050] Correspondingly, if any generator 5 malfunctions and requires emergency repair, such as Figure 10 The arrow shown in -a indicates that molten aluminum is discharged into the outlet pipe 13 through the right-side chamber, and no molten aluminum is injected into the tank body 11 through the inlet pipe 12. Figure 10 The arrow shown in -b indicates that the molten aluminum is discharged into the outlet pipe 13 through the left chamber, and no molten aluminum is injected into the tank body 11 through the inlet pipe 12.

[0051] like Figures 1 to 4 , Figure 9 , Figure 10 As shown, the partition 2 has a contact portion 21 at its end relative to the inner wall of the housing 11. The contact portion 21 cooperates with the first stop block 111 or the second stop block 112 to separate the two chambers. The contact portion 21 of the partition 2 is made of sealing material and is used to control the isolation and sealing between the two chambers.

[0052] The drive shaft 4 drives the partition 2 to rotate as follows: Figure 9 -b、 Figure 9 -c、 Figure 10 In the indicated position, the partition 2 engages with either the first stop block 111 or the second stop block 112 to separate the two chambers and ensure a sealed isolation between them. To increase the contact area between the partition 2 and the first stop block 111 or the second stop block 112, thereby improving the sealing area, the inclined surfaces of the contact portions 21 at the ends of the first stop block 111 or the second stop block 112 and the partition 2 effectively increase the sealing area. Furthermore, the inclined surfaces on both sides of the contact portion 21 can agitate the molten aluminum around the contact portion 21 during rotation. Further, as... Figure 9 -a、 Figure 9 As shown in -b, when partition 2 is... Figure 9 -a indicates the position to be moved to Figure 9 When the contact part 21 is in the position shown in -b, it will rotate and squeeze out the oxide around the second stop block 112, thereby reducing the oxide residue on the contact surface after the contact part 21 contacts the second stop block 112. Correspondingly, when the partition 2 is in the position shown in -b, the contact part 21 will rotate and squeeze out the oxide around the second stop block 112, thereby reducing the oxide residue on the contact surface after the contact part 21 contacts the second stop block 112. Figure 9 -a indicates the position to be moved to Figure 9 When in the position shown in -c, the contact portion 21 can extrude the oxide around the first stop block 111.

[0053] like Figures 1 to 4 , Figure 9As shown, the docking part 3 is configured with an X-shaped structure, and the docking part 3 can correspond to the partition 2 whose position can be changed; the top of the drive shaft 4 passes through the center of the docking part 3, and the top of the drive shaft 4 is rotatably connected inside the docking part 3.

[0054] In this embodiment, when the partition 2 divides the internal chamber of the housing 11 into two independent chambers, the partition 2 corresponds to the docking part 3, such as... Figure 2 As shown, from a top view, the partition 2 is parallel to the connecting part 3, and the overflow groove 31 at the bottom of the connecting part 3 is located at the top of the partition 2. If molten aluminum is injected into the right chamber through the inlet pipe 12, when the liquid level is higher than the overflow groove 31, the molten aluminum will flow into the left chamber through the overflow groove 31, thereby prolonging the refining residence time of the molten aluminum in the tank 11. Correspondingly, when the partition 2 is in such a position... Figure 9 At position -c, the partition 2 will remain parallel to the other part of the docking part 3. At this time, the overflow trough 31 is still at the top of the partition 2. At this time, the aluminum liquid is injected into the left chamber through the liquid inlet pipe 12, and when the liquid level is higher than the overflow trough 31, the aluminum liquid will flow into the right chamber through the overflow trough 31.

[0055] Furthermore, it is foreseeable that the partition 2 can rotate inside the housing 11 under the control of the drive shaft 4, and the drive shaft 4 is provided with a spline in the middle that matches the interior of the partition 2. The top of the drive shaft 4 is connected through to the center of the docking part 3 to maintain the stability of the drive shaft 4.

[0056] like Figures 4 to 6 As shown, the generator 5 includes a flange seat 51, a rotor 52, and a stator 53; the flange seat 51 is provided with a liquid inlet 511 and a transfer chamber 512 for guiding the molten aluminum into the rotor 52 to complete the initial mixing; the rotor 52 can rotate within the flange seat 51 and rotates relative to the stator 53; the bottom of the stator 53 is connected to an inert gas injection pipe 531, and a gas channel 532 is opened inside the stator 53 for injecting inert gas for refining.

[0057] In this embodiment, a bottom-mounted rotor 52 structure is still used, and it also includes a rotor 52 and a stator 53. The rotor 52 is used to disperse the inert gas, and the stator 53 is used to deliver the inert gas into the rotor 52. The difference is that this embodiment also includes a flange seat 51, on which the rotor 52 is rotatably mounted. The bottom of the rotor 52 is rotatably connected to the middle of the flange seat 51 with a sealed connection. The driving method of the rotor 52 is consistent with the prior art. When the inert gas is injected through the inert gas injection pipe 531 and the gas channel 532, the inert gas... Figure 6As indicated by the arrow at the top, the inert gas is injected from the top of the stator 53 into the top of the rotor 52. Then, the rotation of the rotor 52 disperses the inert gas. The flange 51 connects to the bottom of the housing 11. When the rotor 52 rotates rapidly, a siphon effect is formed at the bottom of the rotor 52, causing the molten aluminum around the generator 5 to be passively drawn into the transfer chamber 512 through the inlet 511, and then siphoned into the internal cavity of the rotor 52 through the bottom of the rotor 52. Figure 6 As indicated by the arrow at the bottom, the mixture is combined with dispersed inert gas. With the high-speed rotation of rotor 52, the aluminum liquid mixed with inert gas microbubbles is centrifugally ejected from generator 5. When any generator 5 fails, after the aluminum liquid in the corresponding chamber is emptied, the entire generator 5 can be removed from the housing 11 via the flange for repair, thus simplifying the maintenance of generator 5. It can be understood that when the faulty generator 5 is disassembled, a new generator 5 can be immediately installed on housing 11, realizing easy replacement of the faulty generator 5. Based on this, even if a generator 5 experiences a sudden failure, the generator 5 to be repaired can be quickly isolated by the action of the partition 2 in conjunction with the valve, and degraded operation can be performed to reserve time for planned maintenance and improve availability.

[0058] like Figures 4 to 6 As shown, the rotor 52 has a cavity, which is stepped and includes a first step 522, a second step 523 and a third step 524, for gradually crushing inert gas.

[0059] The inert gas is transported to the cavity inside the rotor 52 through the gas channel 532 in the stator 53. A liquid outlet 521 is provided on the middle side wall of the rotor 52 for discharging the aluminum liquid after it has come into contact with and mixed with the inert gas. A siphon is provided on the bottom side wall of the rotor 52, and the siphon is located in the transfer cavity 512. A first annular boss 533 and a second annular boss 534 are fixed to the top of the stator 53 for cooperating with the stepped cavity to break up the inert gas.

[0060] Furthermore, to microbubble the inert gas filling the inner cavity of the rotor 52, in this embodiment, a cavity is provided inside the rotor 52. After the inert gas is filled into the cavity, it can sequentially pass through the first step 522, the second step 523, and the third step 524. During the flow of the inert gas, the first annular boss 533 and the second annular boss 534 fixed on the outer periphery of the top of the stator 53 can be used to perform high-speed shearing on the flowing inert gas, causing the inert gas to microbubble. Since the rotor 52 is at a high speed... During high-speed rotation, molten aluminum can also be drawn in through the siphon at the bottom. Therefore, the molten aluminum drawn in will mix with the sheared microbubbled inert gas inside the cavity. Under the high-speed rotation of the rotor 52, the mixed molten aluminum and microbubbles will be thrown out of the generator 5 from the outlet 521. The first step 522, the second step 523 and the third step 524 inside the rotor 52 are consistent with the first annular boss 533 and the second annular boss 534 on the outer periphery of the top of the stator 53, and will not be described in detail here.

[0061] like Figures 4 to 6 As shown, the first annular boss 533 and the second annular boss 534 are disposed on the outer periphery of the stator 53 and are arranged at intervals; the first annular boss 533 is disposed at the corner of the first step 522 in the cavity, and the second annular boss 534 is disposed at the corner of the second step 523 in the cavity, and the gap between the first annular boss 533 and the corner of the first step 522 is smaller than the gap between the second annular boss 534 and the corner of the second step 523, so as to generate a fine air curtain.

[0062] like Figures 1 to 10 As shown, it also includes a laser rangefinder sensor for monitoring changes in the liquid level inside the tank 11.

[0063] During the initial filling stage of molten aluminum, the molten aluminum level in the tank 11 needs to be detected based on a laser rangefinder. When the molten aluminum level reaches the expected level, the position of the partition 2 is changed. In this embodiment, the laser rangefinder is not shown in the attached drawings and can be understood as a conventional technical means, which will not be described in detail here.

[0064] like Figures 1 to 10 As shown, the drive shaft 4 is driven by a servo motor; it also includes a main controller, which is electrically connected to the laser rangefinder and the servo motor.

[0065] In this embodiment, a servo motor is used to control the rotation of the drive shaft 4. The drive shaft 4 is connected to the partition plate 2 via a spline, and a sealed bearing is used to connect the drive shaft 4 to the housing 11. The main controller is used to control the start and stop of the servo motor and its rotation direction. The data monitored by the laser rangefinder sensor is transmitted to the main controller. The main controller identifies the matching between the detected aluminum liquid level and the expected liquid level. In addition, the servo motor and the main controller are not shown in the accompanying drawings of this embodiment. It can be understood that the servo motor and the main controller can be understood as prior art, and will not be described in detail here.

[0066] like Figures 1 to 10 As shown, it also includes a vacuum pumping device and an inert gas input device. The vacuum pumping device is connected to the top of the housing 11 to maintain a negative pressure environment. The inert gas input device is used to connect to the inert gas injection pipe 531 of the stator 53 and supply gas to the inside of the generator 5.

[0067] In this embodiment, the vacuum device is used to ensure that no additional oxides are generated during the refining process of the aluminum liquid, thereby avoiding secondary pollution. Secondly, the inert gas input device is used to connect to the inert gas injection pipe 531 and fill the generator 5 with inert gas. Neither the vacuum device nor the inert gas input device is shown in the accompanying drawings of this embodiment. It is understood that both the vacuum device and the inert gas input device can be understood as prior art, and will not be described in detail here.

[0068] Working principle: First, in the initial stage, the working liquid level is quickly established, and the tank 11 is preheated to the working temperature. Then, based on the main controller driving the servo motor, the partition 2 is rotated to the desired position. Figure 9 -a indicates the neutral position, at which point the partition 2 is not in contact with the first stop block 111 or the second stop block 112, and the left and right chambers are connected at the bottom; then the inlet pipe 12 valve is opened and the outlet pipe 13 valve is closed. After the aluminum liquid flows into the tank 11, due to the guiding effect of the partition 2, it can quickly fill the left and right chambers at the same time; during the process, the laser range sensor monitors the liquid level in real time, and after reaching the expected liquid level, it sends a feedback signal to the main controller;

[0069] During the formal refining stage, the main controller controls the partition 2 to rotate to the working position (e.g., Figure 9 (as shown in -b) so that the contact part 21 is tightly fitted with the second stop block 112, dividing the box 11 into two independent sealed chambers; the liquid inlet pipe 12 is connected to the right chamber, and the valve part of the liquid outlet pipe 13 is opened; the aluminum liquid continuously flows into the right chamber from the liquid inlet pipe 12, and when its liquid level rises to exceed the overflow groove 31 on the docking part 3, it overflows into the left chamber and is finally discharged from the liquid outlet pipe 13 of the left chamber, ensuring that all the aluminum liquid has sufficient reaction time;

[0070] During the formal refining stage, the generators 5 in both chambers are started simultaneously. Inert gas is injected into the stepped cavity of the rotor 52 through the gas channel 532 of the stator 53. The high-speed rotating rotor 52 cooperates with the first annular boss 533 and the second annular boss 534 on the stator 53 to shear the gas into ultrafine bubbles. The molten aluminum enters from the inlet 511 of the flange seat 51 under the siphon effect. After being forcibly mixed with the microbubbles in the cavity, it is discharged from the outlet 521 to form a gas curtain, thus completing the removal of hydrogen and slag.

[0071] In special circumstances, such as during online maintenance, if the left chamber generator 5 requires maintenance, the main controller will maintain the partition 2 in the following position: Figure 10 Position -b, so that its contact part 21 fits against the second stop block 112, isolating the left chamber; then close the inlet pipe 12 valve, and the aluminum liquid in the left chamber is discharged from the outlet pipe 13 along with the refined aluminum liquid in the right chamber. After the left chamber is exposed, the generator 5 can be safely disassembled and replaced. During the entire maintenance process, the right chamber continues to operate, and the system continues to work at 50% capacity, reducing downtime losses.

[0072] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An apparatus for refining and modifying molten aluminum, characterized in that: The system includes a degassing box (1), which includes a box body (11), an inlet pipe (12), and an outlet pipe (13). The inlet pipe (12) and the outlet pipe (13) are both connected to the bottom of the box body (11) and are used to control the inflow and outflow of molten aluminum. The inlet pipe (12) and the outlet pipe (13) are arranged in a centrally symmetrical manner. The box (11) is rotatably connected to a partition (2), which divides the box (11) into two chambers for controlling the flow path of the molten aluminum; a docking part (3) is fixedly connected to the top of the box (11), and an overflow groove (31) is provided on the side wall of the docking part (3) relative to the partition (2) for the overflow of molten aluminum. It also includes a drive shaft (4) and a generator (5). Two generators (5) are provided and are centrally symmetrically fixed to the bottom of the box (11) for refining and modifying the aluminum liquid. The drive shaft (4) is rotatably connected to the bottom of the box (11) for driving the partition (2) to rotate inside the box (11).

2. The aluminum melt refining and modification treatment apparatus according to claim 1, characterized in that: The inner side of the box (11) is fixed with two centrally symmetrically arranged first stop blocks (111) and second stop blocks (112) to restrict the movement of the partition (2); one set of first stop blocks (111) and second stop blocks (112) are arranged adjacent to the liquid inlet pipe (12), and another set of first stop blocks (111) and second stop blocks (112) are arranged adjacent to the liquid outlet pipe (13).

3. The aluminum melt refining and modification treatment apparatus according to claim 2, characterized in that: The partition (2) has a contact portion (21) at the end of the inner wall of the box (11). The contact portion (21) cooperates with the first stop block (111) or the second stop block (112) to separate the two chambers. The contact portion (21) of the partition (2) is made of sealing material to control the isolation and sealing between the two chambers.

4. The aluminum melt refining and modification treatment apparatus according to claim 1, characterized in that: The docking part (3) is configured as an X-shaped structure, and the docking part (3) can correspond to the partition (2) whose position can be changed; the top of the drive shaft (4) passes through the center of the docking part (3), and the top of the drive shaft (4) is rotatably connected inside the docking part (3).

5. The aluminum melt refining and modification treatment apparatus according to claim 1, characterized in that: The generator (5) includes a flange seat (51), a rotor (52) and a stator (53); the flange seat (51) is provided with a liquid inlet (511) and a transfer chamber (512) for guiding the aluminum liquid into the rotor (52) to complete the initial mixing; the rotor (52) can rotate within the flange seat (51) and rotates relative to the stator (53); the bottom of the stator (53) is connected to an inert gas injection pipe (531), and a gas channel (532) is opened inside the stator (53) for injecting inert gas for refining.

6. The aluminum melt refining and modification treatment apparatus according to claim 5, characterized in that: The rotor (52) has a cavity, which is stepped and includes a first step (522), a second step (523) and a third step (524) for gradually crushing inert gas. The inert gas is transported to the cavity inside the rotor (52) through the gas channel (532) in the stator (53). A liquid outlet (521) is provided on the middle side wall of the rotor (52) for discharging the aluminum liquid after it has come into contact with and mixed with the inert gas. A siphon is provided on the bottom side wall of the rotor (52) and the siphon is located in the transfer cavity (512). A first annular boss (533) and a second annular boss (534) are fixed to the top of the stator (53) for cooperating with the stepped cavity to crush the inert gas.

7. The aluminum melt refining and modification treatment apparatus according to claim 6, characterized in that: The first annular boss (533) and the second annular boss (534) are disposed on the outer periphery of the stator (53) and are arranged at intervals. The first annular boss (533) is disposed at the corner of the first step (522) in the cavity, and the second annular boss (534) is disposed at the corner of the second step (523) in the cavity. The gap between the first annular boss (533) and the corner of the first step (522) is smaller than the gap between the second annular boss (534) and the corner of the second step (523), so as to generate a fine air curtain.

8. The aluminum melt refining and modification treatment apparatus according to claim 1, characterized in that: It also includes a laser rangefinder sensor for monitoring changes in liquid level inside the tank (11).

9. The aluminum melt refining and modification treatment apparatus according to claim 1, characterized in that: The drive shaft (4) is driven by a servo motor; It also includes a main controller, which is electrically connected to the laser rangefinder and the servo motor.

10. The aluminum melt refining and modification treatment apparatus according to claim 1, characterized in that: It also includes a vacuum pumping device and an inert gas input device. The vacuum pumping device is connected to the top of the housing (11) to maintain a negative pressure environment. The inert gas input device is used to connect to the inert gas injection pipe (531) of the stator (53) and supply gas to the inside of the generator (5).

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