Molten aluminum degassing and filtering integrated device

Abstract

The utility model relates to the technical field of degassing and filtering devices, and particularly discloses a molten aluminum degassing and filtering integrated device which comprises a treatment box, a feeding pipe is fixedly connected to the top of the treatment box, a discharging pipe is fixedly connected to the bottom of the treatment box, and a rotating pipe is rotationally connected into the treatment box. One end of the rotating pipe extends to the outside of the treatment box, an annular pipe is arranged at the bottom of the rotating pipe, a plurality of groups of connecting pipes are fixedly connected between the annular pipe and the rotating pipe, a plurality of groups of nozzles are fixedly connected to the bottom of the annular pipe, a connector is rotatably connected to the top of the rotating pipe, and a fixing frame is fixedly connected to the outside of the connector; according to the utility model, the driving component controls the rotating pipe to rotate intermittently, and the rotating period can be adjusted within 5-30 seconds, so that bubbles form a spiral movement track in molten aluminum, and the contact time of gas and impurities is prolonged while the molten aluminum is fully stirred.

Description

Technical Field

[0001] This utility model relates to the technical field of degassing and filtration devices, and in particular to an integrated degassing and filtration device for molten aluminum. Background Technology

[0002] In the aluminum product manufacturing industry, gaseous impurities (mainly hydrogen) and solid inclusions in molten aluminum are key factors affecting product quality. Hydrogen precipitates during the solidification process of molten aluminum, forming pores that lead to defects such as shrinkage cavities and cracks in castings, reducing the mechanical properties and density of the product. Inclusions, on the other hand, disrupt the continuity of the aluminum matrix, weakening material strength and, in severe cases, even causing product failure. Especially in high-end applications such as aerospace and automotive manufacturing, the purity and performance stability requirements for aluminum products are extremely high. Therefore, efficient degassing and filtration of molten aluminum has become a core element in ensuring product quality. Integrated degassing and filtration devices for molten aluminum integrate degassing and filtration functions, enabling the purification of molten aluminum within the same equipment. Compared to traditional step-by-step processing methods, this significantly shortens the process flow and reduces energy consumption, making it an important device for achieving high-quality purification of molten aluminum.

[0003] However, existing integrated degassing and filtration devices for molten aluminum have many technical bottlenecks. Among them, the degassing system design is unreasonable, and the nozzle orifice diameter of traditional devices is too large, resulting in a small contact area between bubbles and molten aluminum and low mixing efficiency. Utility Model Content

[0004] In view of the technical problem that the degassing system design of the existing aluminum liquid degassing and filtration integrated device is unreasonable, this utility model provides an aluminum liquid degassing and filtration integrated device.

[0005] The technical solution adopted by this utility model is as follows: an integrated aluminum liquid degassing and filtration device, including a processing box, a feed pipe fixedly connected to the top of the processing box, a discharge pipe fixedly connected to the bottom of the processing box, a rotating pipe rotatably connected in the processing box, one end of the rotating pipe extending to the outside of the processing box, an annular pipe provided at the bottom of the rotating pipe, multiple sets of connecting pipes fixedly connected between the annular pipe and the rotating pipe, multiple sets of nozzles fixedly connected to the bottom of the annular pipe, a connector rotatably connected to the top of the rotating pipe, a fixing frame fixedly connected to the outside of the connector, the fixing frame fixedly connected to the processing box, a gas supply pipe fixedly connected to the top of the connector, a drive assembly for intermittently rotating the rotating pipe provided outside the processing box, and a filtration assembly provided inside the processing box.

[0006] A further feature of this invention is that a first guide cylinder and a second guide cylinder are fixedly connected inside the processing box. The inner cavities of both the first guide cylinder and the second guide cylinder are conical structures. The first guide cylinder surrounds the outside of the annular tube, and the second guide cylinder is located below the filter assembly.

[0007] The present invention is further configured such that the driving assembly includes a motor, a driving gear, and an incomplete gear; a mounting bracket is fixedly connected to the outside of the processing box; the motor is fixedly connected to the bottom of the mounting bracket; pulleys are connected to the outside of the processing box and the outside of the rotating tube; a belt is sleeved on the outside of the pulleys; the pulleys located on the processing box are rotatably connected to the processing box; the driving gear is fixedly connected to the pulleys on the same axis; and the output end of the motor is fixedly connected to the incomplete gear.

[0008] A further feature of this invention is that the filtration assembly includes a first filtration layer, a second filtration layer, and a third filtration layer, all of which are fixedly connected inside the processing chamber.

[0009] The present invention is further configured such that the first filter layer is a ceramic fiber woven mesh, the second filter layer is a porous ceramic foam, and the third filter layer is a metal wire mesh.

[0010] A further feature of this invention is that a cleaning port is provided on the outside of the processing box at the positions corresponding to the first filter layer, the second filter layer, and the third filter layer, and a side door is detachably and fixedly connected to the outside of the cleaning port.

[0011] A further feature of this invention is that the processing box has a cylindrical structure, and an insulation board is fixedly connected to the outside of the processing box.

[0012] The beneficial effects of this invention are as follows: In this invention, the drive component controls the intermittent rotation of the rotating tube, with the rotation cycle adjustable within 5-30 seconds. This causes the bubbles to form a spiral trajectory in the molten aluminum, thoroughly stirring the aluminum while extending the contact time between the gas and impurities. This results in a larger contact area between the bubbles and the molten aluminum, improving mixing efficiency and effectively solving the problem of incomplete degassing caused by uneven bubble distribution and short contact time in traditional equipment. The pre-layout design of the filter component provides a reliable guarantee for subsequent molten aluminum purification. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the processing box in this utility model;

[0015] Figure 3 yes Figure 2 Enlarged structural diagram of region A in the middle;

[0016] Figure 4 This is a cross-sectional structural diagram of the processing box in this utility model;

[0017] Figure 5This is a schematic diagram of the annular tube in this utility model.

[0018] The diagram is marked as follows:

[0019] 1. Processing box; 2. Insulation board; 3. Feed pipe; 4. Rotary pipe; 5. Connector; 6. Air supply pipe; 7. Fixing frame; 8. Pulley; 9. Belt; 10. Rotating rod; 11. Drive gear; 12. Mounting frame; 13. Motor; 14. Incomplete gear; 15. First filter layer; 16. Second filter layer; 17. Third filter layer; 18. First guide cylinder; 19. Annular pipe; 20. Jet nozzle; 21. Connecting pipe; 22. Second guide cylinder; 23. Discharge pipe. Detailed Implementation

[0020] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] The following is in conjunction with the appendix Figure 1-5 The present invention will be further described below.

[0022] To address the problems existing in the background art, this application proposes the following technical solution: an integrated aluminum liquid degassing and filtration device, comprising a processing box 1, the processing box 1 having a cylindrical structure, an insulation plate 2 fixedly connected to the outside of the processing box 1, a feed pipe 3 fixedly connected to the top of the processing box 1, a discharge pipe 23 fixedly connected to the bottom of the processing box 1, a rotating pipe 4 rotatably connected inside the processing box 1, one end of the rotating pipe 4 extending to the outside of the processing box 1, an annular pipe 19 provided at the bottom of the rotating pipe 4, multiple sets of connecting pipes 21 fixedly connected between the annular pipe 19 and the rotating pipe 4, multiple sets of nozzles fixedly connected to the bottom of the annular pipe 19, a connector 5 rotatably connected to the top of the rotating pipe 4, and a fixing frame fixedly connected to the outside of the connector 5. 7. The fixed frame 7 is fixedly connected to the processing box 1. The top of the connector 5 is fixedly connected to the gas supply pipe 6. The outside of the processing box 1 is also equipped with a drive assembly for intermittently rotating the rotating pipe 4. The processing box 1 is also equipped with a filter assembly. In the aluminum product processing process, gas impurities and inclusions in the aluminum liquid are the main causes of defects such as pores and cracks in the product. The insulation board 2 on the outside of the processing box 1 is made of nano aerogel felt composite insulation material with a thermal conductivity as low as 0.013W / (m·K), which can effectively reduce the heat loss of the aluminum liquid and control the temperature fluctuation of the aluminum liquid within ±5℃ during the processing. This avoids the solidification of the aluminum liquid or the deterioration of its fluidity due to a sudden drop in temperature, and ensures stable degassing and filtration effects.

[0023] The linkage structure of the rotating tube 4, the annular tube 19, and the nozzles is key to achieving efficient degassing. The rotating tube 4 is made of high-temperature resistant alloy steel, formed by centrifugal casting, and can withstand the scouring of molten aluminum at temperatures above 800℃, with a service life of over 5000 hours. The annular tube 19 and multiple sets of connecting pipes 21 form a gas distribution network, evenly distributing the inert gas introduced by the gas supply pipe 6 to each nozzle. The nozzles adopt a microporous atomization design with an orifice diameter of only 0.3mm, and the diameter of the sprayed bubbles is controlled between 0.5-1mm. Compared with traditional nozzles, the bubble surface area is increased by 3 times, greatly improving the contact efficiency between the gas and the molten aluminum. The drive component controls the intermittent rotation of the rotating tube 4, with a rotation cycle adjustable within 5-30 seconds, causing the bubbles to form a spiral motion trajectory in the molten aluminum. While fully agitating the molten aluminum, it extends the contact time between the gas and impurities, effectively solving the problem of incomplete degassing caused by uneven bubble distribution and short contact time in traditional equipment. The pre-layout design of the filter components provides a reliable guarantee for subsequent molten aluminum purification.

[0024] In this embodiment, a first guide cylinder 18 and a second guide cylinder 22 are fixedly connected inside the processing tank 1. The inner cavities of both the first guide cylinder 18 and the second guide cylinder 22 are conical structures. The first guide cylinder 18 surrounds the outside of the annular tube 19, and the second guide cylinder 22 is located below the filter assembly. The conical structure design of the first guide cylinder 18 and the second guide cylinder 22 is an important innovation for optimizing the flow path of the molten aluminum and improving the processing effect. The first guide cylinder 18 is made of heat-resistant ceramic, and its inner wall is polished with a surface roughness Ra≤0.8μm. Its conical inner cavity, wider at the top and narrower at the bottom, fits tightly with the annular tube 19. When the rotating tube 4 drives the annular tube 19 to rotate, the molten aluminum, under the combined action of centrifugal force and the conical inner wall, forms a spiral downward flow trend, forcing bubbles to mix fully with the molten aluminum, further improving the capture efficiency of gaseous impurities. Simultaneously, the conical structure can effectively disperse the impact force of the molten aluminum on the nozzle, reducing nozzle wear and extending its service life.

[0025] The second guide cylinder 22 is also made of high-temperature and wear-resistant material. Its inverted conical design serves to collect the molten aluminum and guide the flow evenly. After the molten aluminum passes through the filter assembly, the second guide cylinder 22 guides the filtered molten aluminum towards the discharge pipe 23, preventing excessive local pressure on the filter layer due to turbulent flow and protecting the filter material from damage. Its conical inner wall also promotes the convergence of residual micro-entrapments in the molten aluminum towards the center, further improving the filtration accuracy.

[0026] In this embodiment, the drive assembly includes a motor 13, a drive gear 11, and an incomplete gear 14. A mounting bracket 12 is fixedly connected to the outside of the processing box 1. The motor 13 is fixedly connected to the bottom of the mounting bracket 12. Pulleys 8 are connected to the outside of both the processing box 1 and the rotating tube 4. A belt 9 is fitted around the outside of each pulley 8. The pulley 8 on the processing box 1 is rotatably connected to the processing box 1. A rotating rod 10 is rotatably connected to the processing box 1. The pulley 8 is fixedly connected to the rotating rod 10. The drive gear 11 is coaxially fixedly connected to the pulley 8. The output end of the motor 13 is fixedly connected to the incomplete gear 14. Through the structure of "incomplete gear 14 transmission + belt 9 speed change," the drive assembly achieves intermittent and precise rotation of the rotating tube 4, overcoming the problems of uneven bubble distribution and high energy consumption caused by continuous rotation in traditional equipment. The motor 13 is a variable frequency speed control motor 13 with a speed adjustment range of 0-1500 r / min, which can flexibly adjust the rotation frequency of the rotating tube 4 according to the aluminum liquid processing volume and impurity content. The unique design of the incomplete gear 14 is the core of achieving intermittent motion. Its tooth profile is optimized by computer, with a pitch circle diameter error of less than 0.05 mm. When it meshes with the drive gear 11, the transmission is smooth and there is no impact vibration. When the toothed part of the incomplete gear 14 meshes with the drive gear 11, it drives the pulley 8 and the rotating tube 4 to rotate rapidly; when the toothless part is opposite, the rotating tube 4 pauses briefly. This intermittent motion mode causes the bubbles to form periodic disturbances in the aluminum liquid.

[0027] The belt drive system 9 uses a high-strength rubber synchronous belt with a transmission ratio precisely controlled at 1:2. It also has a buffer and shock absorption function, which effectively reduces the impact of motor 13 vibration on the processing box 1. The fixed frame 7 is made of cast steel.

[0028] In this embodiment, the filtration assembly includes a first filter layer 15, a second filter layer 16, and a third filter layer 17. All three layers are fixedly connected inside the processing chamber 1. The first filter layer 15 is a ceramic fiber woven mesh, the second filter layer 16 is a porous ceramic foam, and the third filter layer 17 is a metal wire mesh. Cleaning ports are provided on the outside of the processing chamber 1 at positions corresponding to the first filter layer 15, the second filter layer 16, and the third filter layer 17. A side door is detachably and fixedly connected to the outside of the cleaning ports. The filtration assembly, through its three-layer gradient filtration structure, achieves efficient interception of inclusions of different sizes in the molten aluminum. Its design fully considers both filtration accuracy and service life. The first filter layer 15 uses a high-temperature resistant ceramic fiber woven mesh with a mesh size of 1-2 mm, which can quickly intercept large inclusions with a diameter greater than 1 mm, such as slag and refractory material fragments, playing a coarse filtration role and preventing large particles from clogging subsequent filter layers. This woven mesh possesses excellent flexibility and thermal shock resistance, maintaining structural stability even at 800℃ and boasting a service life exceeding 2000 hours. The second filter layer 16 features a porous ceramic foam with a three-dimensional network structure and an average pore size of only 50-100μm. Its large specific surface area effectively adsorbs and captures minute impurities, achieving a removal rate of up to 95% for particles with a diameter of 0.1-1mm, significantly improving the purity of the molten aluminum. Its unique open-pore structure minimizes pressure loss during aluminum flow, ensuring filtration efficiency.

[0029] The third filter layer 17 uses high-strength stainless steel wire mesh with a mesh count of 200, providing excellent rigidity and support. It can withstand aluminum liquid pressure exceeding 2MPa, preventing the upper filter material from collapsing or breaking under high pressure. Simultaneously, it further filters fine impurities, ensuring the final aluminum liquid contains less than 0.05% inclusions. The design of the cleaning port and side door greatly facilitates the replacement and maintenance of the filter material; the side door uses quick-release bolt connections.

[0030] The usage method of this embodiment is as follows:

[0031] In use, molten aluminum is fed into the processing tank 1 through the feed pipe 3. At the same time, the motor 13 is started and the inert gas is delivered to the rotating pipe 4 through the air pump. The gas is then sprayed out through the nozzle at the bottom of the annular pipe 19. The motor 13 drives the incomplete gear 14 to rotate, which in turn drives the drive gear 11 to rotate intermittently. The drive gear 11 drives the rotating pipe 4 to rotate intermittently through the cooperation of the belt 9 and the pulley 8. This allows the annular pipe 19 to rotate intermittently in the processing tank 1. At the same time, the jet nozzle 20 sprays out a large number of fine and uniform bubbles. These bubbles are fully mixed with the molten aluminum under the rotation of the annular pipe 19. Gas impurities such as hydrogen in the molten aluminum enter the bubbles through diffusion, thus degassing them.

[0032] After degassing, the molten aluminum enters the first filter layer 15, the second filter layer 16, and the third filter layer 17. The first filter layer 15 uses a large-pore ceramic fiber woven mesh, mainly used to intercept larger inclusions, such as slag, and plays a preliminary filtering role. The second filter layer 16 uses porous ceramic foam with smaller pores, which can effectively remove small inclusions and improve the filtration accuracy. The third filter layer 17 uses a metal wire mesh with high strength and rigidity to support the filter material above and prevent the filter material from deforming or breaking under the pressure of the molten aluminum. After filtration, the aluminum is discharged through the discharge pipe 23.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. An integrated device for degassing and filtering molten aluminum, characterized in that, The system includes a processing box (1), with a feed pipe (3) fixedly connected to the top of the processing box (1) and a discharge pipe (23) fixedly connected to the bottom of the processing box (1). A rotating pipe (4) is rotatably connected inside the processing box (1), with one end of the rotating pipe (4) extending to the outside of the processing box (1). An annular pipe (19) is provided at the bottom of the rotating pipe (4). Multiple sets of connecting pipes (21) are fixedly connected between the annular pipe (19) and the rotating pipe (4). Multiple sets of nozzles are fixedly connected to the bottom of the annular pipe (19). A connector (5) is rotatably connected to the top of the rotating pipe (4). A fixing frame (7) is fixedly connected to the outside of the connector (5). The fixing frame (7) is fixedly connected to the processing box (1). An air supply pipe (6) is fixedly connected to the top of the connector (5). A drive assembly for intermittently rotating the rotating pipe (4) is also provided outside the processing box (1). A filter assembly is also provided inside the processing box (1).

2. The integrated aluminum liquid degassing and filtration device according to claim 1, characterized in that, The processing box (1) is fixedly connected with a first guide cylinder (18) and a second guide cylinder (22). The inner cavities of the first guide cylinder (18) and the second guide cylinder (22) are both conical structures. The first guide cylinder (18) surrounds the outside of the annular tube (19), and the second guide cylinder (22) is located below the filter assembly.

3. The integrated aluminum liquid degassing and filtration device according to claim 1, characterized in that, The drive assembly includes a motor (13), a drive gear (11), and an incomplete gear (14). A mounting bracket (12) is fixedly connected to the outside of the processing box (1). The motor (13) is fixedly connected to the bottom of the mounting bracket (12). Pulleys (8) are connected to the outside of the processing box (1) and the outside of the rotating tube (4). A belt (9) is fitted on the outside of the pulleys (8). The pulleys (8) on the processing box (1) are rotatably connected to the processing box (1). The drive gear (11) is fixedly connected to the pulleys (8) on the same axis. The output end of the motor (13) is fixedly connected to the incomplete gear (14).

4. The integrated aluminum liquid degassing and filtration device according to claim 1, characterized in that, The filter assembly includes a first filter layer (15), a second filter layer (16) and a third filter layer (17), all of which are fixedly connected inside the processing box (1).

5. The integrated aluminum liquid degassing and filtration device according to claim 4, characterized in that, The first filter layer (15) is a ceramic fiber woven mesh, the second filter layer (16) is a porous ceramic foam, and the third filter layer (17) is a metal wire mesh.

6. The integrated aluminum liquid degassing and filtration device according to claim 5, characterized in that, The processing box (1) has cleaning ports at the positions corresponding to the first filter layer (15), the second filter layer (16) and the third filter layer (17) on the outside, and a side door is detachably and fixedly connected to the outside of the cleaning port.

7. The integrated aluminum liquid degassing and filtration device according to claim 1, characterized in that, The processing box (1) has a cylindrical structure, and an insulation board (2) is fixedly connected to the outside of the processing box (1).

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