Molten aluminum degassing device

Abstract

The utility model discloses a molten aluminum degassing device, including the outside box body of square structure, outside box body left side fixed mounting liquid inlet groove and liquid outlet groove, inside fixed mounting inside box body of outside box body, and inside box body inside bottom fixed mounting fixed sink block, and fixed sink block left side sets up slow flow step, slow flow step sets up as three -level structure, and the convex block is fixedly installed on the slow flow step upper surface, and the fixed sink block upper surface rotatory mounting rotating shaft, and rotating shaft lower extreme fixed mounting gas -discharging spray head. This molten aluminum degassing device adopts novel structure design, replaces the slow flow block in traditional technology for the sink block structure fixedly installed at the bottom of device, utilizes the stepped structure of sink block to reach the purpose of the deceleration of molten aluminum (set up convex block on the step, further reaches the purpose of deceleration), compared with traditional slow flow block, and the sink block is the whole ceramic structure, and the overall strength is bigger, thereby prolongs the overall service life.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy production technology, specifically to an aluminum liquid degassing device. Background Technology

[0002] In the production of aluminum alloys, aluminum ingots need to be melted into molten aluminum and then shaped. During this process, the molten aluminum contains a certain amount of hydrogen, which will affect the overall quality of the aluminum alloy after production. Therefore, a degassing device is needed to remove the hydrogen. Usually, inert gas is introduced into the molten aluminum to remove the hydrogen.

[0003] In the prior art, Chinese patent application number CN201921852372.1 discloses an aluminum liquid degassing box, belonging to the field of metallurgical equipment technology. This aluminum liquid degassing box includes a box body and a box cover; the box body includes a box wall and a hollow cavity disposed within the box wall; the cavity includes a bottom wall and an inner wall; an inlet is provided on the upper part of the inner wall of one side of the cavity; an outlet is provided on the bottom of the inner wall of the other side of the cavity; a submerged flow plate is installed on the inner wall at one end of the inlet of the cavity. The aluminum liquid enters the aluminum liquid degassing box through the inlet and flows out through the outlet located at the bottom of the degassing box cavity, achieving full utilization of the aluminum liquid. The submerged flow plate helps to separate the aluminum liquid from the outside environment, preventing secondary contamination of the aluminum liquid.

[0004] Based on the above information, it can be seen that in the existing technology, a flow slowing block (i.e., a submerged flow plate) is usually used to slow down the flow rate of molten aluminum during the degassing process. However, the high temperature of the molten aluminum impacts the flow slowing block for a long time, which can easily cause damage to the flow slowing block and result in a short overall service life. Utility Model Content

[0005] The purpose of this invention is to provide an aluminum liquid degassing device to solve the problem of the short overall service life of the slow-flow block mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an aluminum liquid degassing device, comprising an outer casing with a square structure, an inlet tank and an outlet tank fixedly installed on the left side of the outer casing, an inner casing fixedly installed inside the outer casing, and a fixed sink block fixedly installed at the bottom of the inner casing, with a flow-slowing step provided on the left side of the fixed sink block, the flow-slowing step being a three-stage structure, and a protruding stop block fixedly installed on the upper surface of the flow-slowing step; a rotating shaft rotatably installed on the upper surface of the fixed sink block, and an exhaust nozzle fixedly installed at the lower end of the rotating shaft, and the exhaust nozzle being connected to an exhaust pipe.

[0007] Preferably, the position of the slow-flow step corresponds vertically to the position of the liquid inlet tank, and the fixed sink and the slow-flow step are made of ceramic material.

[0008] Preferably, the rotating shaft is configured as a hollow structure communicating with the air outlet nozzle, and the rotating shaft is driven to rotate by a drive motor fixedly installed on the upper surface of the outer casing. The bottom end of the rotating shaft is connected to the air supply pipe using a rotatable sealed connector.

[0009] Preferably, a diversion pipe is fixedly installed in the middle of the gas supply pipeline, and the diversion pipe is connected to an auxiliary hole opened on the side wall of the fixed submersible.

[0010] Preferably, an oil storage tank is fixedly installed inside the inner casing, and heat-absorbing fins for absorbing heat are fixedly installed on the outer surface of the oil storage tank. The oil storage tank stores heat exchange oil, and the maximum temperature of the device is 300 degrees Celsius.

[0011] Preferably, a heat exchange pipe with a bent structure is fixedly installed on the side of the oil storage tank, and the heat exchange pipe is located inside the fixed submerged block.

[0012] Preferably, a delivery pump connected to a heat exchange pipeline is fixedly installed inside the oil storage tank, and the delivery pump is configured as a high-temperature gear metering pump, which can withstand a maximum temperature of 500 degrees Celsius.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the aluminum liquid degassing device adopts a novel structural design, the specific details of which are as follows:

[0014] 1. The traditional flow-retarding block is replaced with a submerged block structure fixedly installed at the bottom of the device. The stepped structure of the submerged block is used to slow down the aluminum liquid (protruding baffles are set on the steps to further slow down the liquid). Compared with the traditional flow-retarding block, the submerged block is an integral ceramic structure with greater overall strength, thereby extending the overall service life.

[0015] Furthermore, the rotating shaft is driven by a drive motor, which in turn drives the external gas nozzle to rotate. This, combined with the helium supplied by the gas supply pipe, removes hydrogen from the molten aluminum. Additionally, some of the helium from the gas supply pipe is ejected from the auxiliary hole through the diverter pipe, improving the uniformity of helium distribution.

[0016] 2. During the operation of the device, the heat exchange fins absorb the temperature of the molten aluminum and then transfer the temperature to the heat exchange oil in the oil tank, so that the heat exchange oil cup is heated to a certain temperature (the maximum temperature of the heat exchange oil is 300 degrees Celsius).

[0017] Furthermore, when the unit is shut down, a transfer pump is used to transport the heat exchange oil in the oil storage tank to the heat exchange pipeline for circulation. This heat exchange pipeline heats the inside of the fixed submersible, causing the fixed submersible to cool down slowly and preventing the fixed submersible from being damaged due to a rapid drop in temperature after the unit is shut down. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the outer casing of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the inner box of this utility model;

[0021] Figure 4 This is a schematic diagram of the fixed sinker structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the connection between the gas supply pipe and the rotating shaft of this utility model;

[0023] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A in the middle;

[0024] Figure 7 This is a schematic diagram of the internal structure of the oil storage tank of this utility model.

[0025] In the diagram: 1. Outer casing; 2. Liquid inlet tank; 3. Liquid outlet tank; 4. Inner casing; 5. Fixed sink; 6. Flow retardant step; 7. Protruding baffle; 8. Rotating shaft; 9. Drive motor; 10. Air outlet nozzle; 11. Air supply pipe; 12. Diverter pipe; 13. Auxiliary hole; 14. Oil storage tank; 15. Heat dissipation fins; 16. Heat exchange pipe; 17. Transfer pump. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1: Please refer to Figures 1-3 and Figure 5In order to achieve the purpose of degassing molten aluminum, this embodiment provides the following technical solution, which specifically discloses: an outer box 1 with a square structure, an inlet tank 2 and an outlet tank 3 fixedly installed on the left side of the outer box 1, an inner box 4 fixedly installed inside the outer box 1, and a fixed sink block 5 fixedly installed at the bottom of the inner box 4, a rotating shaft 8 rotatably installed on the upper surface of the fixed sink block 5, and an exhaust nozzle 10 fixedly installed at the lower end of the rotating shaft 8, and the exhaust nozzle 10 is connected to the air supply pipe 11, the rotating shaft 8 is set as a hollow structure connected to the exhaust nozzle 10, and the rotating shaft 8 is driven to rotate by a drive motor 9 fixedly installed on the upper surface of the outer box 1, and a diversion pipe 12 is fixedly installed in the middle of the air supply pipe 11, and the diversion pipe 12 is connected to the auxiliary hole 13 opened on the side wall of the fixed sink block 5.

[0028] When using the device, the molten aluminum from the previous process enters the inner chamber 4 through the inlet tank 2. At this time, the drive motor 9 is turned on, which drives the rotating shaft 8 to rotate, causing the external gas outlet nozzle 10 to rotate synchronously. At the same time, the gas supply pipe 11 is turned on, and helium (other inert gases can also be used) is continuously supplied to the rotating shaft 8 through the gas supply pipe 11. The gas supply pipe 11 and the rotating shaft 8 are connected by a rotatable sealing structure, and finally the helium is sprayed out from the gas outlet nozzle 10. The helium is used to squeeze out the hydrogen in the molten aluminum, thereby achieving the purpose of degassing. Some of the helium in the gas supply pipe 11 is sprayed out from the auxiliary hole 13 through the diversion pipe 12, thereby improving the uniformity of helium distribution and achieving a better degassing effect.

[0029] Example 2: Please refer to Figure 4 In order to extend the service life, this embodiment provides the following technical solution, which specifically discloses: a slow-flow step 6 is provided on the left side of the fixed sink 5. The slow-flow step 6 is set as a three-level structure, and a protruding baffle 7 is fixedly installed on the upper surface of the slow-flow step 6. The position of the slow-flow step 6 corresponds vertically to the position of the liquid inlet tank 2. The fixed sink 5 and the slow-flow step 6 are made of ceramic material.

[0030] When the molten aluminum falls from the inlet tank 2, it falls onto the slow-flow step 6 on the left side of the fixed sink block 5. The three-stage slow-flow step 6 reduces the flow rate of the molten aluminum. At the same time, the protruding baffle 7 on the slow-flow step 6 further reduces the flow rate of the molten aluminum.

[0031] Example 3: Please refer to Figures 6-7In order to achieve the purpose of slow cooling and reduce damage, this embodiment provides the following technical solution, which specifically discloses: an oil storage tank 14 is fixedly installed inside the inner box 4, and heat-absorbing fins 15 for absorbing heat are fixedly installed on the outer surface of the oil storage tank 14. A heat exchange pipe 16 with a bent structure is fixedly installed on the side of the oil storage tank 14, and the heat exchange pipe 16 is located inside the fixed sink 5. A delivery pump 17 connected to the heat exchange pipe 16 is fixedly installed inside the oil storage tank 14, and the delivery pump 17 is set as a high-temperature gear metering pump.

[0032] During the operation of the device, the heat-absorbing fins 15 on the outer surface of the oil storage tank 14 absorb the temperature of the molten aluminum and use the temperature to heat the heat exchange oil in the oil storage tank 14. Due to continuous heating, the heat exchange oil is eventually heated to the highest temperature. When the device is shut down, the transfer pump 17 inside the oil storage tank 14 is turned on, and the transfer pump 17 is used to transport the heat exchange oil to the heat exchange pipe 16 for circulation. Finally, the heat exchange pipe 16 is used to heat the fixed sink 5, thereby slowing down the cooling rate of the fixed sink 5 and preventing the fixed sink 5 from being damaged due to excessive cooling.

[0033] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An aluminum liquid degassing device, comprising a square-shaped outer casing (1), wherein an inlet tank (2) and an outlet tank (3) are fixedly installed on the left side of the outer casing (1), characterized in that, Also includes: The inner box (4) is fixedly installed inside the outer box (1), and a fixed sink block (5) is fixedly installed at the bottom inside the inner box (4). A flow-slowing step (6) is provided on the left side of the fixed sink block (5). The flow-slowing step (6) is a three-level structure, and a protruding stop block (7) is fixedly installed on the upper surface of the flow-slowing step (6). The fixed sink (5) has a rotating shaft (8) rotatably mounted on its upper surface, and an air outlet nozzle (10) is fixedly mounted on the lower end of the rotating shaft (8), and the air outlet nozzle (10) is connected to the air supply pipe (11).

2. The aluminum liquid degassing device according to claim 1, characterized in that: The position of the slow-flow step (6) corresponds vertically to the position of the liquid inlet tank (2), and the fixed sink (5) and the slow-flow step (6) are both made of ceramic material.

3. The aluminum liquid degassing device according to claim 1, characterized in that: The rotating shaft (8) is configured as a hollow structure communicating with the air nozzle (10), and the rotating shaft (8) is driven to rotate by a drive motor (9) fixedly installed on the upper surface of the outer casing (1).

4. The aluminum liquid degassing device according to claim 1, characterized in that: A diversion pipe (12) is fixedly installed in the middle of the gas supply pipe (11), and the diversion pipe (12) is connected to the auxiliary hole (13) opened on the side wall of the fixed sink (5).

5. The aluminum liquid degassing device according to claim 1, characterized in that: The inner casing (4) has an oil storage tank (14) fixedly installed inside, and the outer surface of the oil storage tank (14) has heat-absorbing fins (15) fixedly installed.

6. The aluminum liquid degassing device according to claim 5, characterized in that: The oil storage tank (14) is fixedly installed with a heat exchange pipe (16) in a bent structure on the side, and the heat exchange pipe (16) is located inside the fixed sink (5).

7. The aluminum liquid degassing device according to claim 6, characterized in that: The oil storage tank (14) is fixedly installed with a delivery pump (17) connected to the heat exchange pipeline (16), and the delivery pump (17) is set as a high-temperature gear metering pump.

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