Molten aluminum refining and degassing device and refining and degassing method

Abstract

The invention belongs to the technical field of non-ferrous metal smelting, and particularly relates to a molten aluminum refining and degassing device and method, the molten aluminum refining and degassing device comprises a degassing box and a cover body, the cover body is provided with a degassing rotor extending into the degassing box, and the outer wall of the degassing rotor is provided with a cone frustum; the slag scraping device further comprises a slag scraping assembly, the slag scraping assembly comprises a telescopic mechanism, a rotating disc, a pressing connection cylinder and a first scraper assembly, a conical hole is formed in the pressing connection cylinder, and the pressing connection cylinder is arranged on the outer wall of the degassing rotor in a sliding mode; the upper part of the crimping cylinder is rotatably arranged on the inner wall of the turntable, the turntable is in transmission connection with the telescopic mechanism, and the bottom end of the crimping cylinder is connected with a first scraper assembly; and the telescopic mechanism is used for driving the compression joint cylinder to move downwards to be in compression fit with the conical surface of the cone frustum, so that the first scraper assembly is driven to rotate around the interior of the degassing box to scrape slag. The degassing device has the functions of degassing and deslagging, is more compact in overall structure, can efficiently and conveniently realize degassing and deslagging, and is high in safety.

Description

Technical Field

[0001] The invention belongs to the technical field of nonferrous metal smelting, and in particular relates to an aluminum liquid refining and degassing device and a refining and degassing method. Background Art

[0002] Aluminum is a silvery-white light metal with high-quality ductility. It is often made into rods, sheets, foils, powders, strips and wires, and is widely used. When producing aluminum products, the aluminum liquid needs to be refined to remove hydrogen from the aluminum liquid.

[0003] The rotary degasser uses a rotor that rotates at high speed and sprays inert gas to break up large inert gas bubbles into very fine bubbles and evenly disperse them in the molten metal. By reducing the bubble diameter, the total surface area of ​​these bubbles increases dramatically, which allows more inert bubble surfaces to contact hydrogen and impurities in the molten metal, thereby bringing these harmful substances to the surface of the liquid. During the degassing process of the aluminum liquid, the aluminum liquid also needs to be deslaged.

[0004] Because impurities are removed at the same time as degassing, a large amount of solid slag impurities accumulate on the surface of the molten aluminum, and it is necessary to manually remove the impurities from the molten aluminum. In addition, since a cover body, a refining device, etc. are generally provided above the refining furnace, the operator is required to directly operate the furnace body filled with molten aluminum during slag discharge, and reach into the slag scooping device from the slag discharge port to scoop the slag. It is difficult to observe the situation in the furnace, and the operation is relatively dangerous. In order to achieve the purpose of removing impurities on the surface of the molten aluminum while refining the molten aluminum, a molten aluminum refining degassing device and a refining degassing method are provided. Summary of the invention

[0005] In view of the technical problems existing in the background technology, the present invention provides an aluminum liquid refining degassing device and a refining degassing method, which can directly perform slag removal operation after the aluminum liquid refining is completed without manual participation, and has high slag removal efficiency and high safety.

[0006] To achieve the above purpose, the technical solution provided by the present invention is:

[0007] A degassing device for aluminum liquid refining comprises a degassing box and a cover body arranged at the upper end of the degassing box, the cover body is provided with a degassing rotor extending into the interior of the degassing box, the outer wall of the degassing rotor is provided with a truncated cone, and the cover body is provided with a driving device for driving the degassing rotor to rotate; it also comprises a slag scraping assembly, the slag scraping assembly comprises a telescopic mechanism, a turntable, a crimping cylinder and a first scraper assembly, the interior of the crimping cylinder is provided with a conical hole, and the crimping cylinder is slidably arranged on the outer wall of the degassing rotor; the upper part of the crimping cylinder is rotatably arranged on the inner wall of the turntable, the turntable and the telescopic mechanism are connected for transmission, and the telescopic mechanism is arranged at the bottom end of the cover body; the bottom end of the crimping cylinder is connected with the first scraper assembly; the telescopic mechanism is used to drive the crimping cylinder to move downward and press fit on the conical surface of the truncated cone, so that the degassing rotor and the crimping cylinder rotate synchronously, thereby driving the first scraper assembly to rotate around the interior of the degassing box to scrape slag.

[0008] Optionally, the scraper assembly also includes a second scraper assembly, and the second scraper assembly is connected to the outer wall of the turntable; during refining and degassing, the first scraper assembly and the second scraper assembly are arranged close to each other; when scraping the slag, the first scraper assembly rotates away from the second scraper assembly to scrape the slag, and the slag is gathered between the first scraper assembly and the second scraper assembly.

[0009] Optionally, a first bevel gear is provided on the outer wall of the crimping cylinder, and the slag scraping assembly also includes a spiral slag conveying assembly, which includes a rotating shaft and a spiral blade arranged on one side of the rotating shaft, and a second bevel gear is provided at the other end of the rotating shaft; the second scraper assembly includes scraper one and scraper two which are bent at a fixed angle to each other, a sleeve is provided parallel to one side of scraper one, one end of the sleeve is connected to scraper two, the rotating shaft is rotatably arranged in the sleeve, and one end of the rotating shaft with the spiral blade extends from one side of scraper two; the first bevel gear and the second bevel gear are meshingly connected.

[0010] Optionally, a connecting rod is extended upwardly on one side of the scraper blade 1, a connecting block is provided on one side of the connecting rod, a connecting portion 1 is provided at one end of the connecting block, and the connecting portion 1 is provided on the outer wall of the turntable.

[0011] Optionally, the first scraper assembly includes a scraper three and a scraper four which are bent at a fixed angle to each other, and a connecting portion two is provided at one end of the scraper three, and the connecting portion two is provided on the bottom wall of the crimping cylinder.

[0012] Optionally, an avoidance groove 1 is provided at the upper end of the scraper 3, and the position of the avoidance groove 1 corresponds to the second bevel gear. When the first scraper assembly rotates close to the second scraper assembly, the second bevel gear is accommodated in the avoidance groove 1.

[0013] Optionally, an avoidance groove 2 is provided at the upper end of the scraper three and the scraper four, and the avoidance groove 2 is connected to the avoidance groove 1. The position of the avoidance groove 2 corresponds to the sleeve. When the first scraper assembly rotates close to the second scraper assembly, the sleeve is accommodated in the avoidance groove 2.

[0014] Optionally, the upper end of the degassing box is provided with an aluminum inlet and a slag discharge port, the bottom end of the degassing box is provided with an aluminum outlet, the end of the scraper 2 is tiltedly arranged on one side of the slag discharge port, and the spiral slag conveying assembly is arranged opposite to the slag discharge port.

[0015] A method for refining and degassing aluminum liquid, comprising the following steps:

[0016] Before aluminum liquid refining, the first scraper assembly and the second scraper assembly are controlled to be close to each other and located on one side of the slag discharge port; during aluminum liquid refining, the degassing rotor is introduced with degassing agent and rotates to realize refining degassing, and the first scraper assembly does not rotate with the degassing rotor; after the aluminum liquid is refined, the degassing rotor drives the first scraper assembly to rotate synchronously, so that the first scraper assembly is away from the second scraper assembly, and the solid slag floating on the surface of the aluminum liquid is rotated and swept toward the slag discharge port, so that the solid slag is located between the first scraper assembly and the second scraper assembly, and the spiral slag conveying assembly is used to discharge the solid slag from the slag discharge port.

[0017] The present invention has the following advantages and beneficial effects:

[0018] In the present invention, before the aluminum liquid is refined, the first scraper assembly and the second scraper assembly are controlled to be close to each other and located on one side of the slag discharge port; when the aluminum liquid is refined, the degassing rotor is introduced into the degassing agent and rotates alone to realize refining and degassing, and the first scraper assembly does not rotate with the degassing rotor. After the aluminum liquid is refined, there is a large amount of scum on the surface of the aluminum liquid. The degassing rotor drives the first scraper assembly to rotate synchronously. At this time, the degassing rotor rotates but is not used for degassing, but drives the first scraper assembly to rotate, so that the first scraper assembly is away from the second scraper assembly, and the solid slag floating on the surface of the aluminum liquid is rotated and swept toward the slag discharge port, so that the solid slag is located between the first scraper assembly and the second scraper assembly, and the spiral slag delivery assembly is used to discharge the solid slag from the slag discharge port. Such a design is further optimized based on the structure of the original degassing rotor, so that the degassing device has both the functions of degassing and slag discharge, and the overall structure is more compact, and will not interfere with the original setting of the degassing device. Degassing and slag discharge can be achieved efficiently and conveniently, with high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A structural diagram of the aluminum liquid refining and degassing device provided by the present invention;

[0020] Figure 2 for Figure 1 Front view of

[0021] Figure 3 for Figure 2 Sectional view along the AA direction;

[0022] Figure 4 for Figure 2 Cross-sectional view along the BB direction;

[0023] Figure 5 for Figure 4 A schematic diagram of the first scraper assembly being closely attached to the second scraper assembly for refining;

[0024] Figure 6 for Figure 2 Left view of

[0025] Figure 7 for Figure 6 Cross-sectional view along CC direction;

[0026] Figure 8 One of the structural diagrams of the first scraper assembly, the second scraper assembly and the degassing rotor provided by the present invention;

[0027] Fig. 9 for Figure 8 A top view of

[0028] Fig.10 The second structural diagram of the first scraper assembly, the second scraper assembly and the degassing rotor provided by the present invention;

[0029] Fig.11 A half-section view of a first scraper assembly, a second scraper assembly and a degassing rotor provided by the present invention;

[0030] Fig.12 One of the structural diagrams of the second scraper assembly provided by the present invention;

[0031] Fig.13 The second structural diagram of the second scraper assembly provided by the present invention;

[0032] Fig.14 for Fig.12 Front view of

[0033] Fig.15 for Fig.14 A top view of

[0034] Fig.16 A structural diagram of a first scraper assembly provided by the present invention;

[0035] Fig.17 for Fig.16 Front view of

[0036] Fig.18 for Fig.17 A top view of

[0037] Fig.19 A structural diagram of the spiral slag conveying assembly provided by the present invention;

[0038] Icons: 1-degassing box, 11-slag discharge port, 12-aluminum inlet, 13-aluminum outlet, 14-cover, 2-degassing rotor, 21-truncated cone, 22-stirring blade, 3-motor, 31-output shaft, 32-pulley one, 33-belt, 34-pulley two, 4-cylinder, 41-piston rod, 42-turntable, 43-bearing, 5-crimping cylinder, 51-first bevel gear, 6-second scraper assembly, 61-scraper one, 62-scraper two, 63-connecting rod, 64-sleeve, 641-shaft hole, 65-connecting block, 66-connecting part one, 7-first scraper assembly, 71-scraper three, 72-scraper four, 73-connecting part two, 74-avoidance groove one, 75-avoidance groove two, 8-spiral blade, 81-rotating shaft, 82-second bevel gear. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example 1

[0042] like Figures 1 to 19As shown, a degassing device for aluminum liquid refining includes a degassing box 1 and a cover body 14 arranged at the upper end of the degassing box 1, and the cover body 14 and the degassing box 1 are detachably arranged. A degassing rotor 2 extending into the interior of the degassing box 1 is arranged on the cover body 14, and a truncated cone 21 is arranged on the outer wall of the degassing rotor 2. A driving device for driving the degassing rotor 2 to rotate is arranged on the cover body 14; it also includes a scraping assembly, which includes a telescopic mechanism, a turntable 42, a crimping cylinder 5 and a first scraper assembly 7. A conical hole (not marked in the figure) is arranged inside the crimping cylinder 5, and the crimping cylinder 5 is slidably arranged on the outer wall of the degassing rotor 2. The crimping cylinder 5 can be matched on the conical surface of the truncated cone 21 through the conical hole. The upper part of the crimping cylinder 5 is rotatably arranged on the inner wall of the turntable 42 through a bearing 43, and the turntable 42 is connected and driven with the telescopic mechanism, and the telescopic mechanism is arranged at the bottom end of the cover body 14. The bottom end of the crimping cylinder 5 is connected to the first scraper assembly 7; the telescopic mechanism is used to drive the crimping cylinder 5 to move downward and press it tightly on the conical surface of the frustum 21, so that the crimping cylinder 5 and the frustum 21 are pressed together, so that the degassing rotor 2 and the crimping cylinder 5 rotate synchronously, thereby driving the first scraper assembly 7 to rotate around the surface of the aluminum liquid inside the degassing box 1 to scrape slag.

[0043] In the present invention, the driving device includes a motor 3, a pulley 1 32, and a pulley 2 34. The interior of the cover 14 is hollow, the motor 3 is arranged at the upper end of the cover 14, the output shaft 31 of the motor 3 is rotatably arranged inside the cover 14, the output shaft 31 is provided with a pulley 1 32, the degassing rotor 2 is provided with a pulley 2 34, and the pulley 1 32 and the pulley 2 34 are connected and driven by a belt 33. Of course, transmission can also be adopted in a manner similar to gears, sprockets, etc. The degassing rotor 2 is driven by the motor 3 to perform rotational motion.

[0044] In the present invention, the telescopic mechanism includes a cylinder 4, which is arranged at the bottom end of the cover body 14, and part of the cylinder 4 is arranged in the cavity inside the cover body 14. The piston rod 41 of the cylinder 4 extends downward and is connected to the turntable 42, so that the cylinder 4 is extended and retracted to drive the crimping tube 5 to slide and rise and fall on the outer wall of the degassing rotor 2, so as to achieve a fixed connection or release of the fixed connection with the degassing rotor 2. When the cylinder 4 is extended, the crimping tube 5 is controlled to move downward to press the truncated cone 21, so that the degassing rotor 2 and the crimping tube 5 can rotate synchronously; when the cylinder 4 is retracted, the crimping tube 5 is controlled to move upward away from the truncated cone 21, so that the degassing rotor 2 can rotate alone, while the crimping tube 5 is fixed.

[0045] This design, through the connection structure design of the first scraper assembly 7 and the degassing rotor 2, allows the degassing rotor 2 to rotate alone to achieve the degassing operation of the aluminum liquid refining, and after the aluminum liquid refining is completed, the degassing rotor 2 and the first scraper assembly 7 are linked and rotated synchronously to achieve the scraping operation on the surface of the aluminum liquid. This design is based on the original structure of the degassing rotor 2, and further optimizes the design, so that the degassing device has both the degassing and slag removal functions, and the overall structure is more compact, which will not interfere with the original setting of the degassing device. It can achieve degassing and slag removal efficiently and conveniently, and has high safety.

[0046] Example 2

[0047] In this embodiment, the scraping assembly is further optimized to improve the scraping efficiency.

[0048] like Figures 1 to 19 As shown, the scraper assembly also includes a second scraper assembly 6, and the second scraper assembly 6 is connected to the outer wall of the rotating disk 42. During refining and degassing, the first scraper assembly 7 and the second scraper assembly 6 are arranged close to each other (such as Figure 5 As shown in the figure, the refined scum will not be mixed between the first scraper assembly 7 and the second scraper assembly 6, which can facilitate the subsequent thorough scraping operation. When scraping the scum, the first scraper assembly 7 rotates away from the second scraper assembly 6 to scrape the scum, that is, from Figure 5 The state shown moves to Figure 4 In the state shown, the first scraper assembly 7 rotates counterclockwise to scrape the slag, scraping the slag on the surface of the aluminum liquid to the other side of the second scraper assembly 6, and gathering the slag between the first scraper assembly 7 and the second scraper assembly 6. This design can completely gather the slag together, so that it is easy to discharge from the slag discharge port 11. Obviously, with this structure, workers do not need to reach into the furnace through the slag scooping equipment to operate, which is safe and has high slag scraping efficiency.

[0049] Example 3

[0050] In this embodiment, the scraping assembly is further optimized and designed to improve the scraping efficiency and the slag discharge efficiency.

[0051] like Figures 1 to 19 As shown, the outer wall of the crimping cylinder 5 is provided with a first bevel gear 51 , the scraping assembly also includes a spiral slag conveying assembly, the spiral slag conveying assembly includes a rotating shaft 81 and a spiral blade 8 arranged on one side of the rotating shaft 81 , and the other end of the rotating shaft 81 is provided with a second bevel gear 82 .

[0052] The second scraper assembly 6 includes a scraper 1 61 and a scraper 2 62 that are bent at a fixed angle to each other. A sleeve 64 is arranged in parallel on one side of the scraper 1 61. The sleeve 64 has an axial hole 641 inside. One end of the sleeve 64 is connected to the scraper 2 62. The rotating shaft 81 is rotatably arranged in the sleeve 64 through a bearing, and one end of the rotating shaft 81 with the spiral blade 8 extends from one side of the scraper 2 62. The first bevel gear 51 and the second bevel gear 82 are meshed and connected. Such a design enables the degassing rotor 2 to drive the crimping cylinder 5 to rotate when the crimping cylinder 5 and the truncated cone 21 are matched, and then the first bevel gear 51 is driven to rotate, thereby driving the second bevel gear 82 to rotate, and finally realizing the function of the spiral blade 8 rotating to discharge slag. This structure utilizes the original degassing rotor 2 and further realizes the function of spiral slag delivery under the function of scraping slag by the first scraper assembly 7. The slag accumulated between the first scraper assembly 7 and the second scraper assembly 6 can be delivered to the slag discharge port 11 for discharge. Thus, multiple functions are realized while utilizing the original driving device, and the efficiency of slag discharge is improved, without the need for manual assistance to remove slag from the slag discharge port 11.

[0053] In the present invention, the upper end of the degassing box 1 is provided with an aluminum inlet 12 and a slag outlet 11, and the lower end of the degassing box 1 is provided with an aluminum outlet 13. During refining, a gate is provided at the aluminum outlet 13 to close. The end of the scraper 2 62 is tilted and arranged at one side of the slag outlet 11, and the spiral slag delivery assembly is arranged opposite to the slag outlet 11 (such as Figure 4 , 5 shown).

[0054] Furthermore, a connecting rod 63 is extended upwardly from one side of the scraper 61 , a connecting block 65 is provided on one side of the connecting rod 63 , a connecting portion 66 is provided at one end of the connecting block 65 , and the connecting portion 66 is fixedly disposed on the outer wall of the turntable 42 .

[0055] Furthermore, the first scraper assembly 7 includes a scraper three 71 and a scraper four 72 which are bent at a fixed angle to each other. A connection part 2 73 is provided at one end of the scraper three 71. The connection part 2 73 is fixedly provided on the bottom wall of the crimping tube 5, so that the first scraper assembly 7 can rise and fall, and rotate as the crimping tube 5 rises and falls.

[0056] Reference Figure 5 When the first scraper assembly 7 and the second scraper assembly 6 are bent, the two scraper assemblies can fit each other, that is, during refining, they can be close to each other to avoid slag being sandwiched between them. At the same time, the scraper 1 61 and the scraper 2 62 are bent, and the scraper 2 62 is bent obliquely toward the slag discharge port 11, and the center of the spiral feeding assembly is almost facing the slag discharge port 11; refer to Figure 6That is, after the refining is completed, the first scraper assembly 7 rotates to scrape the slag and gathers the slag between the first scraper assembly 7 and the second scraper assembly 6, that is, gathers it at the position of the spiral feeding assembly and the position of the slag discharge port 11. The scraper assembly with this bending structure can ensure the position of the slag discharge port 11 where the slag gathers, and can ensure that the spiral feeding mechanism is facing the slag discharge port 11, thereby realizing the precise aggregation and discharge of the slag, and greatly improving the slag discharge efficiency.

[0057] Furthermore, the upper end of the scraper 3 71 is provided with an avoidance groove 74, and the position of the avoidance groove 74 corresponds to the second bevel gear 82. When the first scraper assembly 7 rotates close to the second scraper assembly 6, the second bevel gear 82 is accommodated in the avoidance groove 74. The purpose of this design is that Figure 5 As shown, the first scraper assembly 7 and the second scraper assembly 6 can be brought close to and fitted with each other, and the existence of the avoidance groove 74 can prevent the first scraper assembly 7 from colliding with and interfering with the first bevel gear 51 when it is close to the second scraper assembly 6.

[0058] Furthermore, the upper ends of the scraper blade 3 71 and the scraper blade 4 72 are provided with a second avoidance groove 75, which is connected to the first avoidance groove 74. The position of the second avoidance groove 75 corresponds to the sleeve 64. When the first scraper assembly 7 rotates close to the second scraper assembly 6, the sleeve 64 is accommodated in the second avoidance groove 75. Figure 5 As shown, the first scraper assembly 7 and the second scraper assembly 6 can be brought close to and fitted with each other, and the existence of the avoidance groove 75 can prevent the first scraper assembly 7 from colliding with the sleeve 64 and interfering with the second scraper assembly 6 when the first scraper assembly 7 is close to the second scraper assembly 6.

[0059] In the present invention, the scraper blade 1 61 and the scraper blade 2 62 of the second scraper assembly 6 can be made of high temperature resistant materials, and part of them are immersed in high temperature aluminum liquid, and the scraper blade 3 71 and the scraper blade 4 72 of the first scraper assembly 7 can be adjusted up and down, so they only contact the high temperature aluminum liquid when scraping slag, and the scraper blade 3 71 and the scraper blade 4 72 can be perforated, and the design of the filter hole structure facilitates the aluminum liquid to penetrate when scraping slag. The control of the aluminum liquid level is optimally slightly lower than the height of the slag discharge port 11, and the aluminum liquid and the second bevel gear 82 do not contact, and only the lower half of the spiral blade 8 contacts the aluminum liquid, and the rotating shaft 81 does not contact the aluminum liquid, so that the service life of the overall scraping device can be guaranteed, and the scraping function can be realized.

[0060] A method for refining and degassing aluminum liquid, comprising the following steps:

[0061] Before aluminum liquid refining, the first scraper assembly 7 and the second scraper assembly 6 are controlled to be close to each other (such as Figure 5Specific operation: the cylinder 4 extends, the crimping tube 5 presses the truncated cone 21, the degassing rotor 2 and the crimping tube 5 rotate synchronously, and the rotation adjustment of the first scraper assembly 7 is realized to make it close to the second scraper assembly 6.

[0062] During aluminum liquid refining, the degassing rotor 2 is fed with a degassing agent (argon, etc.) and rotates to achieve refining and degassing, and the first scraper assembly 7 does not rotate with the degassing rotor 2. Specific operation: the cylinder 4 contracts, the crimping cylinder 5 moves away from the truncated cone 21, the degassing rotor 2 rotates alone to achieve aluminum liquid refining and degassing, and the first scraper assembly 7 and the second scraper assembly 6 are fixed.

[0063] After the aluminum liquid is refined, the degassing rotor 2 drives the first scraper assembly 7 to rotate synchronously, so that the first scraper assembly 7 is away from the second scraper assembly 6, and the solid slag floating on the surface of the aluminum liquid is rotated and swept toward the slag discharge port 11, so that the solid slag is located between the first scraper assembly 7 and the second scraper assembly 6, and the spiral slag conveying assembly is used to discharge the solid slag from the slag discharge port 11 (such as Figure 4 Specific operation: the air cylinder 4 extends, the crimping cylinder presses the truncated cone 21, the degassing rotor 2 and the crimping cylinder 5 rotate synchronously, the first scraper assembly 7 is rotated to scrape the scum, and the scum is gathered between the first scraper assembly 7 and the second scraper, and when the scum is rotated to scrape the scum, the spiral feeding assembly rotates synchronously to send the scum to the scum discharge port 11 for discharge.

[0064] It should be noted that: the first bevel gear 51 and the second bevel gear 82 cooperate in operation. When the cylinder 4 contracts, the first bevel gear 51 will be partially or completely separated from the second bevel gear 82. The distance of separation depends on the actual operation. For example, if the first scraper assembly 7 is not required to contact the aluminum liquid during refining, the first bevel gear 51 needs to be completely separated from the second bevel gear 82. Otherwise, it is not necessary. When the cylinder 4 is extended, the crimping tube 5 is first pressed on the surface of the truncated cone 21 by its own weight. At this time, the cylinder 4 is depressurized, and the first bevel gear 51 and the second bevel gear 82 are fitted, but not fully meshed. Then, the degassing rotor 2 rotates, which can drive the first bevel gear 51 to rotate adaptively and adjust the position of the lifting and lowering. After it is fully engaged with the second bevel gear 82, the cylinder 4 can be locked and the pressure can be maintained.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A molten aluminum refining and degassing device, characterized in that : comprising a degassing box and a cover body arranged at the upper end of the degassing box, The cover body is provided with a degassing rotor extending into the degassing box, the outer wall of the degassing rotor is provided with a truncated cone, and the cover body is provided with a driving device for driving the degassing rotor to rotate; It also includes a scraping assembly, which includes a telescopic mechanism, a rotating disk, a crimping cylinder and a first scraper assembly. A conical hole is provided inside the crimping cylinder, and the crimping cylinder is slidably arranged on the outer wall of the degassing rotor; the upper part of the crimping cylinder is rotatably arranged on the inner wall of the rotating disk, the rotating disk and the telescopic mechanism are connected for transmission, and the telescopic mechanism is arranged at the bottom end of the cover body; the bottom end of the crimping cylinder is connected with the first scraper assembly; The telescopic mechanism is used to drive the crimping cylinder to move downward and press fit on the conical surface of the truncated cone, so that the degassing rotor and the crimping cylinder rotate synchronously, thereby driving the first scraper assembly to rotate around the inside of the degassing box to scrape slag.

2. The aluminum liquid refining and degassing device according to claim 1 is characterized in that: The scraping assembly also includes a second scraper assembly, and the second scraper assembly is connected to the outer wall of the turntable; during refining and degassing, the first scraper assembly and the second scraper assembly are arranged close to each other; when scraping the slag, the first scraper assembly rotates away from the second scraper assembly to scrape the slag, and the slag is gathered between the first scraper assembly and the second scraper assembly.

3. The aluminum liquid refining and degassing device according to claim 2 is characterized in that: A first bevel gear is provided on the outer wall of the crimping cylinder, and the slag scraping assembly also includes a spiral slag conveying assembly, which includes a rotating shaft and a spiral blade arranged on one side of the rotating shaft, and a second bevel gear is provided at the other end of the rotating shaft; the second scraper assembly includes scraper 1 and scraper 2 which are bent at a fixed angle to each other, a sleeve is provided in parallel on one side of the scraper 1, one end of the sleeve is connected to the scraper 2, the rotating shaft is rotatably arranged in the sleeve, and one end of the rotating shaft with the spiral blade extends from one side of the scraper 2; the first bevel gear and the second bevel gear are meshingly connected.

4. The aluminum liquid refining and degassing device according to claim 3 is characterized in that: A connecting rod is extended upwardly on one side of the scraper plate, a connecting block is provided on one side of the connecting rod, a connecting portion 1 is provided at one end of the connecting block, and the connecting portion 1 is provided on the outer wall of the rotating disk.

5. The aluminum liquid refining and degassing device according to claim 3 is characterized in that: The first scraper assembly includes a scraper three and a scraper four which are bent at a fixed angle to each other. A connecting portion two is provided at one end of the scraper three, and the connecting portion two is provided on the bottom wall of the crimping cylinder.

6. The aluminum liquid refining and degassing device according to claim 5, characterized in that: An avoidance groove 1 is provided at the upper end of the scraper 3, and the position of the avoidance groove 1 corresponds to the second bevel gear. When the first scraper assembly rotates close to the second scraper assembly, the second bevel gear is accommodated in the avoidance groove 1.

7. The aluminum liquid refining and degassing device according to claim 6, characterized in that: The upper ends of the scraper three and the scraper four are provided with avoidance grooves 2, and the avoidance grooves 2 are connected to the avoidance grooves 1. The position of the avoidance grooves 2 corresponds to the sleeve. When the first scraper assembly rotates close to the second scraper assembly, the sleeve is accommodated in the avoidance grooves 2.

8. The aluminum liquid refining and degassing device according to claim 3 is characterized in that: The upper end of the degassing box is provided with an aluminum inlet and a slag discharge port, the bottom end of the degassing box is provided with an aluminum outlet, the end of the scraper 2 is tiltedly arranged on one side of the slag discharge port, and the spiral slag delivery assembly is arranged opposite to the slag discharge port.

9. A method for refining and degassing aluminum liquid using the aluminum liquid refining and degassing device according to any one of claims 1 to 8, comprising the following steps: Before aluminum liquid refining, the first scraper assembly and the second scraper assembly are controlled to be close to each other and located on one side of the slag discharge port; During aluminum liquid refining, the degassing rotor is fed with degassing agent and rotates to realize refining and degassing, and the first scraper assembly does not rotate with the degassing rotor; After the aluminum liquid is refined, the degassing rotor drives the first scraper assembly to rotate synchronously, so that the first scraper assembly moves away from the second scraper assembly, and the solid slag floating on the surface of the aluminum liquid is rotated and swept toward the slag discharge port, so that the solid slag is located between the first scraper assembly and the second scraper assembly, and the spiral slag delivery assembly is used to discharge the solid slag from the slag discharge port.

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