Continuous casting aluminum-magnesium alloy production line

Abstract

The application discloses a continuous casting aluminum-magnesium alloy production line, which comprises a smelting furnace, a tilting pouring furnace, a continuous ingot casting machine provided with a mold, a plug rod tundish and a slag scraping device arranged in sequence. The application relates to the technical field of aluminum-magnesium alloy preparation, and can be buckled on the mold after pouring to perform vacuumizing operation, effectively avoiding the contact between aluminum liquid and air and preventing the generation of fine defects. Meanwhile, the mold periphery is cooled during the vacuumizing operation, which is helpful to the rapid and uniform cooling of the aluminum liquid and improves the overall quality of the aluminum alloy ingot. In the slag scraping process, inert gas is sprayed to the slag scraping plate, so that the tiny blocky dross is concentrated on the slag scraping plate, and the cleaning effect of the dross is improved. In addition, inert gas is directly blown to the surface of the solution after the dross is scraped, so that the impurity residues are minimized, the contact between the aluminum alloy solution and air is further prevented, and the surface quality of the aluminum alloy ingot is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aluminum magnesium alloy preparation, in particular to a continuous casting aluminum magnesium alloy production line. BACKGROUND

[0002] At present, the complete refining production line of electric heating magnesium aluminum alloy is usually composed of a holding furnace, a melting furnace, a tilting pouring device, a straight-line continuous casting machine, and a stirring device and a crucible. In the prior art, inert gas is filled into the aluminum water in the melting furnace and stirred to remove impurities in the solution and improve the quality of the aluminum magnesium alloy block. When the aluminum liquid is poured in the mold of the straight-line continuous casting machine, the oxides and impurities on the surface of the aluminum alloy ingot during pouring need to be scraped off to improve the surface quality of the aluminum alloy ingot.

[0003] During operation, the aluminum liquid naturally cools down and contacts hydrogen in the air, causing fine defects on the surface. To solve this problem, the vacuum pouring method is commonly used at present, that is, the mold is placed in a vacuum tank, and after vacuumizing, the aluminum liquid is poured into the mold in the vacuum tank from the upper intermediate ladle, and then taken out after cooling. However, this method has limited production and is difficult to cooperate with the continuous casting machine in the production line, which cannot meet the needs of large-scale production and limits the improvement of production efficiency and capacity of aluminum magnesium alloy. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a continuous casting aluminum magnesium alloy production line, which solves the problem of fine defects on the surface of the existing aluminum alloy ingot during continuous casting.

[0005] To achieve the above-mentioned purpose, the present application realizes the following technical scheme: a continuous casting aluminum magnesium alloy production line, the production line comprises a melting furnace, a tilting pouring furnace, a continuous ingot casting machine provided with a mold, a plug rod intermediate ladle and a slag scraping device arranged in series, the slag scraping device comprises:

[0006] a frame erected outside the continuous ingot casting machine;

[0007] a moving mechanism arranged in the frame, comprising a first direction moving mechanism and a second direction moving mechanism;

[0008] a buckle cover driven by the first direction moving mechanism to be away from or buckled on the mold; the buckle cover comprises an outer buckle cover wrapable outside the mold and an inner buckle cover abuttable on the mold, and a gap cavity is formed between the inner buckle cover and the outer buckle cover;

[0009] a vacuum pipe communicated on the outer buckle cover and the inner buckle cover to suck the gas between the gap cavity and the inner buckle cover and the mold;

[0010] The clamping jaw mechanism comprises a driving assembly and two oppositely arranged slag scraping plates, and the driving assembly drives the two slag scraping plates to move relative to the surface of the mold.

[0011] The inert gas supply assembly comprises an inert gas supply pipe and a gas jet nozzle in communication with the inert gas supply pipe, and the gas jet nozzle is arranged on the slag scraping plate.

[0012] Preferably, the inner buckle cover comprises a top plate, the top of the top plate is connected with the outer buckle cover through a linkage telescopic rod; one opposite surface of the top plate is provided with a fixed plate, the other opposite surface is provided with a side plate, and the other opposite surface has a cavity on the inner side, which can allow the side plate to be inserted; one end of the side plate inserted into the cavity is connected with the top plate through a spring; the vacuum pipe communicates with the cavity, the inside of the side plate is hollow, and one end close to the top plate is provided with an opening.

[0013] Preferably, the bottom of the top plate is an inclined third wall surface which is in contact with the mold, and the inner opening of the mold is formed with a second wall surface matched with the third wall surface, and the top end of the second wall surface vertically extends to form a first wall surface.

[0014] Preferably, the driving assembly comprises a motor fixed on the outer buckle cover, and the output shaft of the motor is provided with a gear at the end after penetrating through the outer buckle cover and the top plate; the driving assembly further comprises two gear racks arranged in a staggered manner and engaged with the gear, and the two slag scraping plates are arranged at the ends of the gear racks.

[0015] Preferably, the bottom of the top plate is provided with a sliding rail along the arrangement direction of the gear rack, the top of the gear rack is provided with a guide wheel, and the guide wheel is slidingly connected to the sliding rail.

[0016] Preferably, the two slag scraping plates are hinged at the ends of the gear racks, and a second driving telescopic rod is hinged between the ends of the gear racks and the slag scraping plates.

[0017] Preferably, the outer wall of the slag scraping plate is provided with a gas guide structure, and the gas guide structure comprises a first gas guide plate and a second gas guide plate; a first clamping cavity is formed between the first gas guide plate and the slag scraping plate, the top gas inlet end of the first clamping cavity faces the gas jet nozzle, and the bottom gas outlet end faces the bottom end of the slag scraping plate; a second clamping cavity is formed between the second gas guide plate and the first gas guide plate, the top gas inlet end of the second clamping cavity faces the gas jet nozzle, and the bottom gas outlet end is arranged at the bottom.

[0018] Preferably, the first gas guide plate comprises a first wall plate fixed with the slag scraping plate, and an inner folding plate located at the bottom of the first wall plate; the second gas guide plate comprises a second wall plate fixed with the first wall plate, and the top of the second wall plate is provided with an outer folding plate.

[0019] Preferably, the gap of the first clamping cavity gradually decreases from the gas inlet end to the gas outlet end; the gap of the second clamping cavity gradually increases from the gas inlet end to the gas outlet end.

[0020] Preferably, the first direction moving mechanism comprises a first driving telescopic rod and an auxiliary telescopic rod connected to the outer buckle cover; the second direction moving mechanism comprises an electric slide rail arranged on the frame, and the first driving telescopic rod and the auxiliary telescopic rod are arranged at the moving end of the electric slide rail.

[0021] The application has the beneficial effects that: by using the continuous casting aluminum-magnesium alloy production line provided by the application, compared with the prior art, the slag scraping device is arranged in the output direction of the continuous casting machine, can be buckled on the mold after pouring to perform vacuumizing operation, effectively avoids the contact of the aluminum liquid with air, and prevents the generation of fine defects. Meanwhile, the periphery of the mold is cooled during the vacuumizing operation, which is helpful for the rapid and uniform cooling of the aluminum liquid, and improves the overall quality of the aluminum alloy ingot. After vacuumizing, the slag scraping plate can be extended into the surface of the aluminum alloy liquid to perform slag scraping operation, further improving the surface quality of the aluminum alloy ingot.

[0022] In the slag scraping process, inert gas is sprayed to the slag scraping plate, which can concentrate the small blocky dross at the slag scraping plate, improve the cleaning effect of the dross. In addition, the inert gas is directly blown to the surface of the solution after the dross is scraped, which can minimize the residue of impurities, further prevent the contact of the aluminum alloy solution with air, protect the surface quality of the aluminum alloy ingot, improve the production efficiency and product quality, and meet the large-scale production demand. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a production line process schematic diagram of the application;

[0024] Figure 2 It is a continuous ingot casting machine structure schematic diagram of the application;

[0025] Figure 3 It is a left view of the buckle cover of the application;

[0026] Figure 4 It is a front view of the buckle cover of the application;

[0027] Figure 5 It is an air flow flow chart of the buckle cover of the application after being buckled on the mold of the continuous ingot casting machine;

[0028] Figure 6 It is a slag scraping work schematic diagram of the buckle cover of the application after being buckled on the mold of the continuous ingot casting machine;

[0029] Figure 7 It is an enlarged schematic diagram of A in the application; Figure 6

[0030] Figure 8 It is an enlarged schematic diagram of B in the application; Figure 6

[0031] Figure 9 ​​A three-dimensional structure schematic diagram of the slag scraping plate of the present application;

[0032] Figure 10 A front view of the slag scraping plate of the present application;

[0033] Figure 11 A state diagram of the present application when the buckle cover is buckled on the mold and the buckle cover is above the mold.

[0034] Explanation of reference numerals in the drawings:

[0035] 1, smelting furnace, 2, tilting pouring furnace, 3, continuous casting machine, 4, plug rod tundish, 5, frame, 6, outer buckle cover, 7, opening, 8, first drive telescopic rod, 9, vacuum pump, 10, motor, 11, inert gas supply pipe, 12, top plate, 13, side plate, 14, gap cavity, 15, slag scraping plate, 16, gear, 17, rack, 18, second drive telescopic rod, 19, electric sliding rail, 20, auxiliary telescopic rod, 21, linkage telescopic rod, 22, air jet nozzle, 23, guide wheel, 24, sliding rail, 25, spring, 26, first wall surface, 27, second wall surface, 28, third wall surface, 29, first clamping cavity, 30, second clamping cavity, 31, outer folding plate, 32, first wall plate, 33, second wall plate, 34, inner folding plate, 35, fixed plate. DETAILED DESCRIPTION

[0036] In order to better explain the present application, the following will be described in detail in combination with specific embodiments. Figures 1 to 10 The present application discloses a continuous casting aluminum-magnesium alloy production line. The production line comprises a smelting furnace, a tilting pouring furnace, a continuous casting machine provided with a mold, a plug rod tundish and a slag scraping device arranged in series. The slag scraping device comprises a buckle cover, a vacuum pump, a clamping jaw mechanism and an inert gas supply assembly. The vacuum pump is connected to the outer buckle cover and the inner buckle cover to suck the gas between the gap cavity and the mold. The inert gas supply assembly comprises an inert gas supply pipe and an air jet nozzle connected to the inert gas supply pipe, and the air jet nozzle is arranged on the slag scraping plate. By arranging the slag scraping device in the output direction of the continuous casting machine, the vacuum operation can be performed on the poured mold, effectively preventing the aluminum liquid from contacting the air and preventing the formation of fine defects. In the slag scraping process, inert gas is sprayed to the slag scraping plate, which can concentrate the small block-shaped dross on the slag scraping plate and improve the cleaning effect of the dross. In addition, inert gas is directly blown to the surface of the solution after the dross is scraped, which can minimize the residue of impurities, further prevent the aluminum alloy solution from contacting the air, ensure the surface quality of the aluminum alloy ingot, improve the production efficiency and product quality, and meet the large-scale production demand.

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Various changes can be made to the implementation schemes as long as the effects of the present invention can be achieved.

[0038] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the art. The following mainly introduces the working principle and process.

[0039] Example 1:

[0040] like Figure 1 As shown, a continuous casting aluminum-magnesium alloy production line includes a continuously arranged melting furnace 1, a tilting casting furnace 2, a continuous ingot casting machine 3 equipped with molds, a stopper rod tundish 4, and a slag scraping device. Figure 2 As shown, the slag scraping device is located on one side of the stopper rod intermediate jar 4. When the aluminum-magnesium alloy solution in the stopper rod intermediate jar 4 is poured into the mold and conveyed to one side, the slag scraping device scrapes off the floating slag on the surface of the solution in the mold.

[0041] Specifically, such as Figure 3 and Figure 4 As shown, the slag scraping device includes a frame 5, a moving mechanism, a cover, a vacuum tube 9, a gripper mechanism, and an inert gas supply assembly. The moving mechanism is used to engage the cover with the mold and to move the cover and gripper mechanism out of the continuous casting machine 3. The vacuum tube 9 is used to extract air between the cover and the mold, accelerating the airflow speed on the outer wall of the mold to increase the cooling rate, and enabling the gripper mechanism to scrape the slag from the solution surface under relative vacuum. The inert gas supply assembly blows inert gas onto the solution surface, ensuring that the solution surface after slag removal is in direct contact with the inert gas, preventing surface defects caused by contact between the solution surface and air.

[0042] In this embodiment, the frame 5 is mounted on the outside of the continuous casting machine 3, and a slag receiving groove is provided on the frame 5 to receive the floating slag gripped by the gripper mechanism.

[0043] like Figure 4 As shown, in this embodiment, the moving mechanism is set within the frame 5, including a first-direction moving mechanism and a second-direction moving mechanism; wherein, the first-direction moving mechanism is used to drive the cover away from or onto the mold in the vertical direction. The second-direction moving mechanism is used to drive the cover and the gripper mechanism to disengage from the continuous casting machine 3 in the transverse direction and move them above the slag receiving trough, and to drive the cover and the gripper mechanism to reset to above the mold.

[0044] Specifically, the first direction moving mechanism comprises a first driving telescopic rod 8 and an auxiliary telescopic rod 20 connected to the outer cover 6, and the first driving telescopic rod 8 and the auxiliary telescopic rod 20 are arranged in two symmetrical positions on the cover. The first driving telescopic rod 8 is a hydraulic telescopic rod or an electric telescopic rod, and the auxiliary telescopic rod 20 is a stainless steel telescopic rod made of material 304, comprising an outer cylinder and an inner cylinder movably connected in the outer cylinder. The auxiliary telescopic rod 20 is used to assist the movement of the first driving telescopic rod 8, and to ensure the parallel stability of the cover during upward and downward movement.

[0045] In addition, the second direction moving mechanism comprises an electric slide rail 19 arranged on the frame 5, and the electric slide rail 19 is arranged in the transverse direction of the continuous casting machine 3. The first driving telescopic rod 8 and the auxiliary telescopic rod 20 are arranged at the moving end of the electric slide rail 19. When the sliding block of the electric slide rail 19 moves, the first driving telescopic rod 8, the auxiliary telescopic rod 20 and the cover are driven to move transversely out of the continuous casting machine 3 and above the slag trough or to the upper side of the mold.

[0046] In the embodiment, as shown in Figure 3 and Figure 11 The cover comprises an outer cover 6 which can be semi-wrapped on the outside of the mold (specifically, the outer cover 6 is sleeved on the outside of the mold) and an inner cover which can abut against the mold. A gap cavity 14 is formed between the inner cover and the outer cover 6.

[0047] In addition, as shown in Figure 5 The vacuum pipe 9 of the embodiment is connected to a vacuum pump at one end and is communicated with the outer cover 6 and the inner cover through a four-way joint at the other end, so as to suck the gas between the gap cavity 14 and the mold. Under the action of negative pressure, the flow velocity of the gas flowing around the mold is accelerated, the hot gas around the mold is accelerated to flow to the vacuum pipe 9 through the gap cavity 14, the rapidly flowing gas exchanges heat with the surrounding relatively low-temperature environment, and the heat around the mold is taken away, thereby reducing the temperature on the outside of the mold. At the same time, the gas between the inner cover and the mold is sucked by the vacuum pipe 9 to form a relatively vacuum state, reducing the contact amount of the aluminum-magnesium alloy solution in the mold with air, preventing the surface defects of the magnesium-aluminum alloy ingot caused by the contact of the solution surface with air.

[0048] In one connection embodiment of the vacuum pipe 9, two connection ends of the four-way joint are connected to the vacuum pump and the outer cover 6 respectively, and the communication part of the outer cover 6 is used to suck the gas in the gap cavity 14. The other two connection ends are connected to the two side plates 13 of the inner cover through a flexible pipe, and are used to suck the gas between the inner cover and the mold.

[0049] Specifically, in the embodiment, the inner buckle cover comprises a top plate 12, the top of the top plate 12 is connected with the outer buckle cover 6 through a linkage telescopic rod 21, and the top plate 12 is connected with the outer buckle cover 6 as a whole. The linkage telescopic rod 21 is a stainless steel telescopic rod made of 304 stainless steel. The top plate 12 is rectangular, and a fixing plate 35 is arranged at the edge of one opposite surface of the top plate 12. The top plate 12 and the fixing plate 35 can be integrated, for example, in the shape of “M”. The other opposite surface is provided with a side plate 13. The fixing plate 35 is located at the short side of the top plate 12, and the side plate 13 is located at the long side of the top plate 12. In actual work, the fixing plate 35 is not movable at the short side of the top plate 12, and the side plate 13 is located between the two fixing plates 35. The edge of the side plate 13 has a gap with the inner wall of the fixing plate 35.

[0050] It should be noted that the edge of the side plate 13 is in a vertical relationship with the fixing plate 35, and a gap of 1-2 mm is left between the edge of the side plate 13 and the fixing plate 35 to ensure that the side plate 13 can be smoothly moved inward or outward, and to reduce the inflow of gas in the gap cavity 14 between the inner buckle cover and the mold.

[0051] In the embodiment, the side plate 13 is movably connected with the top plate 12, for example, the other opposite surface of the top plate 12 is provided with a cavity into which the side plate 13 can be inserted, and the side plate 13 can be movably inserted into the cavity. In addition, one end of the side plate 13 inserted into the cavity is connected with the top plate 12 through a spring 25, so that the side plate 13 can be pushed out by the spring 25 after being inserted into the cavity. The vacuum pipe 9 is in communication with the cavity, the side plate 13 is hollow inside to form a vacuum cavity, and one end close to the top plate 12 is provided with an opening 7. The opening 7, the vacuum cavity and the cavity form a communication path.

[0052] The negative pressure suction force in the vacuum pipe 9 sucks the gas between the inner buckle cover and the mold through the communication path. When the space between the inner buckle cover and the mold is under negative pressure, the side plate 13 is retracted inward and clamped to the inner mouth along of the mold under the action of the negative pressure, the opening 7 is retracted into the cavity to close the communication path, and the inner buckle cover drives the clamping jaw mechanism to descend to contact the surface of the aluminum-magnesium alloy solution.

[0053] Further, as Figure 10As shown, the bottom of the top plate 12 is inclined third wall surface 28, the inner edge of the mold is formed with the second wall surface 27 matched with the third wall surface 28, and the top end of the second wall surface 27 is vertically extended to form the first wall surface 26. When the lower edge plate 13 is retracted inwardly from the state of abutting on the mold and engaged to the inner edge of the mold, the third wall surface 28 of the outer wall surface of the lower edge plate 13 is embedded into the inner edge of the mold, the third wall surface 28 is attached to the second wall surface 27 to form a first sealing surface, and the side wall of the lower edge plate 13 is attached to the first wall surface 26 to form a second sealing surface, and the side wall of the lower edge plate 13 is engaged to the first wall surface 26 to form an engagement structure, so as to prevent the lower edge plate 13 from expanding outwardly to reset the inner cover and the clamping jaw mechanism.

[0054] In this embodiment, as shown in Figure 3 and Figure 7 , the clamping jaw mechanism includes a driving assembly and two oppositely arranged slag scraping plates 15, and the driving assembly is used to drive the two slag scraping plates 15 to move relatively on the surface of the mold; for example, to move relatively close to hold the floating slag floating on the surface of the aluminum-magnesium alloy, or to move relatively far away to reset.

[0055] Specifically, the driving assembly of the present embodiment includes a motor 10 fixed on the outer cover 6, and the output shaft of the motor 10 is provided with a gear 16 after penetrating through the outer cover 6 and the top plate 12. It should be noted that the top plate 12 is provided with a hole for the output shaft of the motor 10 to pass through, and the diameter of the hole is larger than that of the output shaft to ensure that the top plate 12 can move up and down freely without affecting the rotation of the output shaft. Further, the driving assembly further includes two gear racks 17 arranged in a staggered manner and engaged with the gear 16, and the two slag scraping plates 15 are arranged at the ends of the gear racks 17. The two gear racks 17 are arranged on both sides of the gear 16, and one end of the two gear racks 17 coincides in the front view projection, and the coincident part is the engagement part with the gear 16. When the gear 16 is driven by the motor 10, the two gear racks 17 move inward synchronously, driving the two slag scraping plates 15 to move inward to scrape the floating slag on the surface of the solution; when the motor 10 is reversed, the two gear racks move outward synchronously, driving the two slag scraping plates 15 to reset.

[0056] As shown in Figure 3 and Figure 7 , the bottom of the top plate 12 is provided with a sliding rail 24 along the arrangement direction of the gear rack 17, and the top of the gear rack 17 is provided with a guide wheel 23 which is slidingly connected to the sliding rail 24, so as to fix the gear rack 17 and ensure that the gear rack 17 can normally reciprocate.

[0057] As shown in Figure 7As shown, to facilitate slag scraping, in this embodiment, two slag scraper plates 15 are hinged to the ends of a rack 17. A second drive telescopic rod 18 is hinged between the end of the rack 17 and the slag scraper plates 15. The second drive telescopic rod 18 is a hydraulic telescopic rod. After the two slag scraper plates 15 come close together, the second drive telescopic rod 18 retracts, causing the two slag scraper plates 15 to snap together, thus fixing the scraped slag between the two slag scraper plates 15. At the same time, when the electric slide rail 19 moves the cover laterally to above the slag receiving trough, the second drive telescopic rod 18 advances, causing the two slag scraper plates 15 to separate, and the slag falls into the slag receiving trough.

[0058] In this embodiment, the inert gas supply assembly includes an inert gas supply pipe 11 and a jet nozzle 22 connected to the inert gas supply pipe 11. The jet nozzle 22 is disposed on the scraper plate 15, with the gas outlet facing the bottom end of the scraper plate 15.

[0059] The aforementioned inert gas supply pipe 11 is connected to an inert gas source, such as a storage tank. The inert gas is the same as the inert gas injected into the smelting furnace 1, and nitrogen is preferred.

[0060] Example 2:

[0061] like Figure 9 and Figure 10 A continuous casting aluminum-magnesium alloy production line, this embodiment is an improvement on the slag scraper 15 in embodiment one.

[0062] In this embodiment, the outer wall of the slag scraper 15 is provided with a gas guiding structure for diverting inert gas and guiding the diverted inert gas to the liquid surface after slag removal and the end of the slag scraper 15 respectively.

[0063] Specifically, in order to better utilize the inert gas, the gas guiding structure includes a first gas guiding plate and a second gas guiding plate. A first cavity 29 is formed between the first gas guiding plate and the slag scraper 15, and a second cavity 30 is formed between the second gas guiding plate and the first gas guiding plate.

[0064] For example, the top air inlet of the first clamping cavity 29 faces the jet nozzle 22, and the bottom air outlet faces the bottom of the scraper plate 15. The inert gas after being diverted is guided along the first clamping cavity 29 to the end of the scraper plate 15, blowing the small lumps of scum to the end of the scraper plate 15 and contacting most of the scum scraped by the scraper plate 15, thereby improving the scraping effect on the solution.

[0065] For example, the top air inlet of the second clamping cavity 30 faces the jet nozzle 22, and the bottom air outlet faces the bottom. The inert gas after being diverted is blown along the second clamping cavity 30 to the solution surface, and the inert gas is directly blown to the solution surface after the scum is scraped off.

[0066] Specifically, the first gas guide plate comprises a first wall plate 32 fixed with the slag scraping plate 15, and an inner folding plate 34 located at the bottom of the first wall plate 32. In a first gas guide plate setting mode, the first wall plate 32 is arranged towards the air jet nozzle 22 to divide the air flow jetted out by the air jet nozzle 22 into the first clamping cavity 29 and the second clamping cavity 30. The inner folding plate 34 is folded towards the slag scraping plate 15 to guide the inert gas to the end of the slag scraping plate 15. In addition, the gap of the first clamping cavity 29 gradually decreases from the air inlet end to the air outlet end, so that the flow rate of the air flow increases in the gradually decreasing gap, the impact force of the inert gas when jetted out is improved, and it is ensured that the small block-shaped scum can be blown and jetted to the end of the slag scraping plate 15.

[0067] The second gas guide plate comprises a second wall plate 33 fixed with the first wall plate 32, and the top of the second wall plate 33 is provided with an outer folding plate 31 which blocks the outside of the air jet nozzle 22. The gap of the second clamping cavity 30 gradually increases from the air inlet end to the air outlet end, so that the outflow surface of the air flow increases in the gradually increasing gap, the blowing area is increased, and the inert gas can contact the surface of the solution after the scum is scraped.

[0068] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A continuous casting aluminum-magnesium alloy production line, characterized in that: The production line includes a continuously arranged smelting furnace, a tilting casting furnace, a stopper rod tundish, a continuous ingot casting machine equipped with molds, and a slag scraping device, wherein the slag scraping device includes: The frame is erected on the outside of the continuous casting machine; The moving mechanism, disposed within the frame, includes a first-direction moving mechanism and a second-direction moving mechanism; The cover is driven away from or fastened to the mold by the first direction moving mechanism; the cover includes an outer cover that can wrap around the outside of the mold and an inner cover that can abut against the mold, and a gap cavity is formed between the inner cover and the outer cover; A vacuum tube is connected to the outer and inner covers to draw out the gas between the gap cavity and the inner cover and the mold. The gripper mechanism includes a drive assembly and two opposing scraper blades. The drive assembly drives the two scraper blades to move relative to each other on the mold surface. The drive assembly includes a motor fixed to the outer cover. The output shaft of the motor passes through the outer cover and the top plate and has a gear at its end. The drive assembly also includes two racks that are staggered and mesh with the gears. The two scraper blades are located at the ends of the racks. An inert gas supply assembly includes an inert gas supply pipe and an air nozzle connected to the inert gas supply pipe, the air nozzle being disposed on a scraper plate; The second directional moving mechanism is used to drive the cover and gripper mechanism to move away from the continuous casting machine in the lateral direction of the continuous casting machine and move to the top of the slag receiving trough, and to drive the cover and gripper mechanism to reset to the top of the mold. The inner cover includes a top plate, the top of which is connected to the outer cover via a linkage telescopic rod; a fixing plate is provided on one opposite side of the top plate, and a side plate is provided on the other opposite side, with a cavity for inserting the side plate into the inner side of the other opposite side; one end of the side plate inserted into the cavity is connected to the top plate via a spring; a vacuum tube communicates with the cavity; the side plate is hollow inside and has an opening at one end close to the top plate; the bottom of the top plate that abuts against the mold is an inclined third wall surface; a second wall surface that matches the third wall surface is formed at the inner edge of the mold; and the top of the second wall surface extends vertically upward to form a first wall surface.

2. The continuous casting aluminum-magnesium alloy production line according to claim 1, characterized in that: The bottom of the top plate is provided with a slide rail along the rack layout direction, and the top of the rack is provided with a guide wheel, which is slidably connected to the slide rail.

3. The continuous casting aluminum-magnesium alloy production line according to claim 1, characterized in that: The two scraper blades are hinged to the ends of the rack, and a second drive telescopic rod is hinged between the ends of the rack and the scraper blades.

4. The continuous casting aluminum-magnesium alloy production line according to claim 1, characterized in that: The outer wall of the slag scraper is provided with an air guiding structure, which includes a first air guiding plate and a second air guiding plate; a first clamping cavity is formed between the first air guiding plate and the slag scraper, the top air inlet of the first clamping cavity faces the jet nozzle, and the bottom air outlet faces the bottom of the slag scraper; a second clamping cavity is formed between the second air guiding plate and the first air guiding plate, the top air inlet of the second clamping cavity faces the jet nozzle, and the bottom air outlet faces the bottom.

5. A continuous casting aluminum-magnesium alloy production line according to claim 4, characterized in that: The first air guide plate includes a first wall panel fixed to the slag scraper and an inner folding plate located at the bottom of the first wall panel; the second air guide plate includes a second wall panel fixed to the first wall panel, and an outer folding plate is provided at the top of the second wall panel.

6. The continuous casting aluminum-magnesium alloy production line according to claim 4, characterized in that: The gap between the first clamping cavity and the air inlet end gradually decreases; the gap between the second clamping cavity and the air inlet end gradually increases.

7. The continuous casting aluminum-magnesium alloy production line according to claim 1, characterized in that: The first directional movement mechanism includes a first drive telescopic rod and an auxiliary telescopic rod connected to the outer cover; the second directional movement mechanism includes an electric slide rail disposed on the frame, with the first drive telescopic rod and the auxiliary telescopic rod disposed at the moving end of the electric slide rail.

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