Molten aluminum refining and degassing device

Abstract

The utility model discloses a molten aluminum refining degassing device which comprises a base, a top frame is supported on the base through a supporting rod, a degassing bin filled with molten aluminum is placed in the space of the base, an end cover with air holes is arranged at an opening in the top of the degassing bin, and a gathering pipe located above the degassing bin is communicated with the middle of the end cover in a penetrating mode. A transmission shaft penetrates through a motor of the gathering pipe, the free end of the transmission shaft is detachably connected with a stirrer extending into the degassing bin, and stirring edges are formed on a main rod body of the stirrer; compared with a traditional single-side lifting type structure, the vertical type lifting mechanism is of a vertical type structure, the occupied area is smaller, and the problem of abrasion caused by deflection transmission does not exist; by arranging the structure of the stirrer, molten aluminum around the stirrer can be fully stirred, bubbles in the molten aluminum can be fully mixed with diffused inert gas, and the degassing effect of the molten aluminum is improved; and the degassing bin is covered by the end cover, so that the heat loss of the molten aluminum is reduced.

Description

Technical Field

[0001] The utility model relates to a refining and degassing device, in particular to a molten aluminum refining and degassing device. Background Art

[0002] The working principle of a molten aluminum degassing and refining machine is that during operation, the rotating rotor breaks the inert gas blown into the molten aluminum into a large number of dispersed bubbles, which are dispersed in the molten aluminum. The bubbles absorb hydrogen in the molten solution, adsorb oxide inclusions, and are carried out of the molten solution surface with the rise of the bubbles by the principle of gas partial pressure difference and surface adsorption in the molten solution, so that the molten solution is purified. Due to the small and dispersed bubbles, they are evenly mixed with the rotating molten solution and slowly float upward in a spiral shape with the rotation. When contacting the molten solution, they will not form an air flow rising in a continuous straight line, thus significantly improving the purification effect.

[0003] However, when the stirring shaft or impeller rotates at a high speed driven by the motor, the molten aluminum near the stirring shaft also rotates at a high speed. In this process, the molten aluminum is thrown out by the impeller, resulting in a decrease in the pressure near the stirring shaft. The bubbles in the molten aluminum near the stirring shaft are not fully diffused and have a poor combination effect with hydrogen, resulting in inconsistent degassing effects at various parts of the molten aluminum.

[0004] The existing molten aluminum degassing and refining machines are often arranged in an open manner, while the temperature during molten aluminum refining is usually 700 - 750 degrees. Open degassing will reduce the temperature of the molten aluminum, causing heat loss and increasing the cost of subsequent hot processing of the molten aluminum. Content of the Utility Model

[0005] In order to solve the deficiencies of the above technologies, the utility model provides a molten aluminum refining and degassing device.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: it includes a base, the base supports a top frame through a support rod. An air removal chamber filled with molten aluminum is placed in the space of the base. The top open part of the air removal chamber is equipped with an end cover with air holes. A collecting pipe located above the air removal chamber is penetrated and communicated through the middle position of the end cover. It also includes an air inlet pipe communicated with the collecting pipe and a motor with a transmission shaft penetrating the collecting pipe. The free end of the transmission shaft is detachably connected with a stirrer extending into the air removal chamber. Stirring edges are formed on the main rod body of the stirrer.

[0007] Furthermore, the air inlet pipe is connected to an external inert gas source, and the upper part of the air inlet pipe penetrates the top frame.

[0008] Furthermore, the bent part of the air inlet pipe is a telescopic pipe, and an air path cut-off valve is arranged at the connection part of the telescopic pipe and the upper part of the air inlet pipe.

[0009] Further, the intake pipe is arranged in two paths, and the two intake pipes are respectively arranged on both sides of the motor. The intake pipe is equipped with a mounting plate for carrying the motor, and the mounting plate is implemented in a way that limits and carries the motor.

[0010] Further, a through hole for the transmission shaft to pass through is opened in the center of the collecting pipe. An air passage communicating with the intake pipe is also opened in the collecting pipe, and the air passage and the through hole are independently arranged.

[0011] Further, the agitator includes a mounting head clamped with the sleeve at the free end of the transmission shaft. The mounting head is integrally provided with the main rod body, and a stirring head is arranged at the other end of the main rod body.

[0012] Further, a plurality of equally spaced grooves are opened on the main rod body. The length extension direction of the grooves is the same as the length extension direction of the main rod body, and a stirring edge is formed between two adjacent grooves.

[0013] Further, large blades and small blades with different distribution positions are formed on the stirring head, and the large blades are implemented in a way that is closer to the free end of the stirring head than the small blades.

[0014] The utility model discloses an aluminum liquid refining and degassing device, whose overall design is a vertical structure. Compared with the traditional single-side lifting structure, it occupies less floor space and there is no wear problem caused by deflection transmission. By setting the structure of the agitator, the aluminum liquid around the agitator can also be fully stirred, so that the bubbles in the aluminum liquid can be fully mixed with the diffused inert gas, improving the degassing effect of the aluminum liquid. The degassing chamber is also covered by an end cover to reduce the heat loss of the aluminum liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front view of the utility model.

[0016] Figure 2 is the structural schematic diagram of the agitator of the utility model.

[0017] In the figure: 1. Base; 2. Support rod; 3. Top frame; 4. Intake pipe; 5. Expansion pipe; 6. Gas path cut-off valve; 7. Collecting pipe; 8. End cover; 9. Air hole; 10. Degassing chamber; 11. Mounting plate; 12. Motor; 13. Transmission shaft; 14. Agitator; 15. Mounting head; 16. Main rod body; 17. Stirring head; 18. Large blade; 19. Small blade; 20. Groove; 21. Stirring edge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further describes the utility model in detail in conjunction with the drawings and specific embodiments.

[0019] This embodiment relates to an aluminum liquid refining and degassing device, which is of an overall vertical structure, including a base 1. The base 1 supports a top frame 3 through a support rod 2, and an overall framework of the vertical structure is formed by the three of them. The vertical structure saves more floor space compared with the traditional unilateral lifting structure.

[0020] An degassing chamber 10 filled with aluminum liquid is placed in the space of the base 1. An end cover 8 with air holes 9 is equipped at the open top of the degassing chamber 10. A collecting pipe 7 located above the degassing chamber 10 is penetrated and communicated in the middle position of the end cover 8. The end cover 8 and the collecting pipe 7 are connected to each other. It also includes an air inlet pipe 4 communicated with the collecting pipe 7, and a motor 12 whose transmission shaft 13 penetrates the collecting pipe 7. The free end of the transmission shaft 13 is detachably connected with a stirrer 14 extending into the degassing chamber 10. Stirring edges 21 are formed on the main rod body 16 of the stirrer 14.

[0021] The air inlet pipe 4 is connected to an external inert gas source, and the external inert gas source is prior art. The upper part of the air inlet pipe 4 penetrates the top frame 3. In the actual production process, the part where the air inlet pipe 4 is connected to the top frame 3 is implemented by plugging, and the plugging form is implemented in a way to prevent falling off, specifically formed by the way that the through opening of the top frame 3 is adapted to the outer diameter of the air inlet pipe 4. Those skilled in the art can process adaptively according to the equipment size.

[0022] The bent part of the air inlet pipe 4 is a telescopic pipe 5. The telescopic pipe 5 is specifically a 304 stainless steel telescopic hose. A gas path cut-off valve 6 is provided at the connection part of the telescopic pipe 5 and the upper part of the air inlet pipe 4. It should be noted that the air inlet pipe 4 is also made of metal material.

[0023] In this embodiment, the air inlet pipe 4 is provided with two paths. The two air inlet pipes 4 are respectively arranged on both sides of the motor 12. The air inlet pipe 4 is equipped with a mounting piece 11 for carrying the motor 12. The mounting piece 11 is implemented in a way to limit and carry the motor 12. The mounting piece 11 is specifically an iron sheet connected to the outer periphery of the air inlet pipe 4 through a hoop. The connection method through the hoop is prior art, so it is not shown in the figure. By adjusting the position of the mounting piece 11, the position where the motor 12 is carried is adjusted, so as to adapt to degassing chambers 10 of different heights and improve the adaptability of the overall facility.

[0024] A through hole for facilitating the penetration of the transmission shaft 13 is opened in the center of the collecting pipe 7. An air passage communicated with the air inlet pipe 4 is also opened in the collecting pipe 7. The air passage and the through hole are independently arranged. The opening of the air passage and the through hole is common knowledge, so it is not shown in the figure. It can be understood that through the above gas path structure, inert gas can be added into the aluminum liquid in the degassing chamber 10.

[0025] As Figure 2As shown, the stirrer 14 includes a mounting head 15 that is snap-fitted to the sleeve at the free end of the transmission shaft 13. It can be understood that a sleeve is provided at the free end of the transmission shaft 13, and the form of the sleeve is not limited. Specifically, it can be in the form of a forging shaft or a coupling, as long as the mounting head 15 can be snap-fitted to the sleeve through its snap ring. In addition, the mounting head 15 is integrally provided with the main rod body 16, and a stirring head 17 is provided at the other end of the main rod body 16.

[0026] A number of equally spaced grooves 20 are formed on the main rod body 16. The length extension direction of the grooves 20 is the same as that of the main rod body 16. A stirring edge 21 is formed between two adjacent grooves 20. The stirring edge 21 is used to stir the molten aluminum near the main rod body 16 and enhance the stirring effect of the molten aluminum around the main rod body 16.

[0027] On the stirring head 17, large blades 18 and small blades 19 with different distribution positions are formed. The large blades 18 are arranged closer to the free end of the stirring head 17 than the small blades 19, that is, as Figure 2 shown, the large blades 18 are located at the distal end. In order to prevent the molten aluminum near the proximal end of the stirring head 17 from being insufficiently stirred, the small blades 19 are provided.

[0028] Thus, the molten aluminum refining and degassing device disclosed by the present utility model has an overall vertical structure design, which occupies less floor area compared to the traditional single-side lifting structure and does not have the wear problem caused by deflection transmission. By setting the structure of the stirrer, the molten aluminum around the stirrer can also be fully stirred, enabling the bubbles in the molten aluminum to be fully mixed with the diffused inert gas and improving the degassing effect of the molten aluminum. The degassing chamber is also covered by an end cover to reduce the heat loss of the molten aluminum.

[0029] The above embodiments are not limitations on the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the technical scope of the present utility model also fall within the protection scope of the present utility model.

Claims

1. An aluminum liquid refining and degassing device, characterized in that: It includes a base (1), on which a top frame (3) is supported by a support rod (2). An in-gassing chamber (10) filled with molten aluminum is placed inside the space of the base (1). At the open top of the in-gassing chamber (10), an end cap (8) with air holes (9) is equipped. A collecting pipe (7) located above the in-gassing chamber (10) penetrates through the middle position of the end cap (8). It also includes an intake pipe (4) connected to the collecting pipe (7), and a motor (12) whose drive shaft (13) penetrates through the collecting pipe (7). The free end of the drive shaft (13) is detachably connected to a stirrer (14) extending into the in-gassing chamber (10). Stirring ridges (21) are formed on the main rod body (16) of the stirrer (14).

2. The aluminum liquid refining and degassing device according to claim 1, wherein: The intake pipe (4) is connected to an external inert gas source, and the upper part of the intake pipe (4) penetrates through the top frame (3).

3. The aluminum liquid refining and degassing device according to claim 2, characterized in that: The bent part of the intake pipe (4) is a telescopic pipe (5), and an air path cut-off valve (6) is provided at the connection of the telescopic pipe (5) and the upper part of the intake pipe (4).

4. The aluminum liquid refining and degassing device according to claim 3, characterized in that: The intake pipe (4) is arranged in two paths, and the two intake pipes (4) are respectively arranged on both sides of the motor (12). The intake pipe (4) is equipped with a mounting plate (11) for carrying the motor (12), and the mounting plate (11) is implemented in a way that limits and carries the motor (12).

5. The aluminum liquid refining and degassing device according to claim 1, characterized in that: A through hole for facilitating the passage of the drive shaft (13) is opened in the center of the collecting pipe (7). An air passage communicating with the intake pipe (4) is also opened in the collecting pipe (7), and the air passage and the through hole are independently arranged.

6. The aluminum liquid refining and degassing device according to claim 1, characterized in that: The stirrer (14) includes a mounting head (15) clamped with a sleeve at the free end of the drive shaft (13). The mounting head (15) is integrally provided with the main rod body (16), and a stirring head (17) is arranged at the other end of the main rod body (16).

7. The aluminum liquid refining and degassing device according to claim 6, characterized in that: A number of equally spaced grooves (20) are opened on the main rod body (16). The length extension direction of the grooves (20) is the same as that of the main rod body (16), and stirring ridges (21) are formed between two adjacent grooves (20).

8. The aluminum liquid refining and degassing device according to claim 6, characterized in that: Large blades (18) and small blades (19) with different distribution positions are formed on the stirring head (17), and the large blades (18) are implemented in a way that is closer to the free end of the stirring head (17) than the small blades (19).

Images