Aluminum oxide continuous blanking device for aluminum electrolysis cell

Abstract

The utility model relates to the technical field of aluminum electrolysis, and particularly discloses an aluminum electrolysis cell aluminum oxide continuous blanking device which comprises an electrolysis cell, a crusting layer, a first hydraulic rod, a crust breaking hammer head, a sliding rail, a spring, a first rack, two pushing turnover mechanisms and two discharging mechanisms, the crusting layer is arranged in the electrolysis cell, and the first hydraulic rod penetrates through the electrolysis cell in a rotating mode. A crust breaking hammer is arranged on the first hydraulic rod, a sliding rail is arranged in the electrolytic cell, the sliding rail is clamped in the sliding groove in a sliding mode, a spring is arranged between the sliding groove and the sliding rail, a first rack is arranged on the sliding rail, and two pushing and overturning mechanisms used for conveying aluminum oxide to a crust layer are arranged on the sliding rail; and two discharging mechanisms used for conveying aluminum oxide to the two pushing and overturning mechanisms correspondingly are arranged on the electrolytic cell, and the technical problem that production and life safety of workers are affected due to the fact that flying dust cannot be effectively controlled in the discharging process of existing continuous aluminum oxide discharging equipment is solved.

Description

Technical Field

[0001] This utility model relates to the field of aluminum electrolysis technology, and specifically discloses a continuous alumina feeding device for an aluminum electrolysis cell. Background Technology

[0002] The traditional Hall-Héroult process has always been the only method for industrial aluminum smelting. In traditional aluminum electrolysis cells, alumina is added to the melt as the main raw material. The alumina raw material added to the electrolysis cell is dispersed and dissolved in the electrolyte melt, and then reaches the electrode reaction interface to participate in the electrochemical reaction and be reduced to generate liquid molten aluminum. Because the density of the aluminum liquid is higher than that of the electrolyte, it settles below the electrolyte layer to form an aluminum liquid layer. Finally, as a product, it leaves the aluminum electrolysis cell through an intermittent siphon operation. At present, domestic aluminum electrolysis plants feed alumina powder into the electrolysis cell intermittently and quantitatively through a constant volume feeder. The constant volume feeder includes a space with a certain volume and upper and lower cones. Under the existing electrolysis cell operation mode, the upper cone is opened to allow alumina to enter the constant volume feeder from the alumina hopper. Then the upper cone is closed and the lower cone is opened to allow all the alumina in the constant volume feeder to enter the electrolysis cell.

[0003] For example, utility model patent CN204661839U discloses a continuous alumina feeding device, including an alumina hopper, a feeding cylinder disposed within the alumina hopper, and a fixed container connected to the bottom of the feeding cylinder. The continuous alumina feeding device also includes a feeding pipe fixedly disposed at the bottom of the alumina hopper, with the fixed container housed within the feeding pipe. A funnel-shaped feeding section is provided on the feeding pipe below the fixed container, and a feeding port is provided at the bottom end of the feeding section. The feeding pipe also includes an elastic sheet fixed to the bottom end of the feeding section and capable of partially blocking the feeding port. Compared with related technologies, the advantages of this utility model are that the thermal balance fluctuation of the aluminum electrolysis cell is smaller after feeding, the stability of the aluminum electrolysis cell is better, the current efficiency is higher, and the energy consumption is lower.

[0004] Existing continuous alumina feeding devices only reduce the thermal balance fluctuations of the electrolytic cell after feeding and improve stability. However, they do not solve the dust problem during the alumina feeding process. When alumina is released from the hopper and discharged through the feeding pipe to the feed inlet at the crust layer inside the electrolytic cell, due to its small particle size, large specific surface area, and certain fluidity, it forms a high-concentration dust cloud around the feed inlet as it falls under the action of gravity. These dust particles are suspended in the air, which not only reduces the visibility inside the production equipment but also poses a threat to the health of operators. Long-term exposure may lead to respiratory diseases. In addition, the flying alumina dust may adhere to the surface of the equipment, affecting the heat dissipation and normal operation of the equipment, and may even cause safety accidents such as fires or explosions. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a continuous alumina feeding device for aluminum electrolysis cells, so as to solve the technical problem that existing continuous alumina feeding equipment cannot effectively control dust during the feeding process, which will affect production and the life safety of workers.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes an electrolytic cell, a crust layer, a first hydraulic rod, a shell-breaking hammer, a slide rail, a spring, a first rack, two pushing and turning mechanisms, and two discharging mechanisms. The crust layer is disposed within the electrolytic cell. The first hydraulic rod passes through the electrolytic cell, and the shell-breaking hammer is fixedly connected to the telescopic end of the first hydraulic rod. The slide rail is disposed within the electrolytic cell and is slidably fitted into grooves opened on two opposite inner sidewalls of the electrolytic cell. The spring is disposed between the grooves and the slide rail. The first rack is disposed on the slide rail. Two pushing and turning mechanisms for conveying alumina to the crust layer are disposed on the slide rail. Two discharging mechanisms for conveying alumina to the two pushing and turning mechanisms are disposed on the electrolytic cell. The alumina is conveyed to the push-turn mechanism through the discharge mechanism, and then conveyed to the feed port opened at the shell layer by the shell-breaking hammer through the push-turn mechanism. The secondary transfer through the push-turn mechanism can effectively avoid the dust problem that is easy to generate by the traditional direct pipeline conveying of alumina.

[0007] Furthermore, the pushing and flipping mechanism includes a second hydraulic rod, a fixed platform, a first wedge block, and a second wedge block. The second hydraulic rod rotates through the electrolytic cell, and the fixed platform is positioned between the second hydraulic rod and the electrolytic cell. The first wedge block is fixedly connected to the telescopic end of the second hydraulic rod, and the second wedge block slides through the first wedge block. The first wedge block limits the left and right movement of the second wedge block, but does not limit its up and down movement, allowing for more flexible movement of the second wedge block.

[0008] Furthermore, the pushing and flipping mechanism also includes a sliding frame, two sliding blocks, two rotating shafts, a storage tank, and a first gear. The second wedge block is fixedly connected to the sliding frame, and the sliding frame is slidably mounted in the slide rail through the sliding blocks. Two rotating shafts are respectively arranged between the two sliding blocks, and the storage tank is fixedly connected between the two rotating shafts. The storage tank has a discharge port that penetrates the interior, and the two rotating shafts are provided with the first gear that can mesh with the first rack. After the discharge mechanism delivers alumina into the storage tank, the first hydraulic rod pushes the storage tank to the inlet. Simultaneously, the first gear and the first rack mesh and rotate, pouring the alumina from the storage tank into the inlet. The storage tank transfers the alumina to the inlet. During the direct feeding process, due to the lack of a material flow control device, the alumina powder generates a violent turbulent effect with the air in free fall, causing significant diffusion of small suspended particles. By transferring the alumina to the inlet through the storage tank, the flow rate of alumina is reduced, which can effectively improve the dust problem.

[0009] Furthermore, the discharge mechanism includes a storage tank, a valve device, a discharge pipe, and a control device. The storage tank is installed on the electrolytic cell, and the valve control device is installed inside the storage tank. The discharge pipe, which communicates with the discharge port, is installed on the storage tank, and the control device for sealing alumina is installed inside the discharge pipe. Alumina is transported to the storage tank via the discharge mechanism, and the control device can seal the alumina into the discharge pipe. During the alumina transfer process in the storage tank, the alumina sealed in the discharge pipe undergoes preliminary preheating treatment at the high temperature within the electrolytic cell, improving the fuller participation of the alumina in the subsequent reaction.

[0010] Furthermore, the control device includes a baffle, a connecting rod, a second gear, a limiting frame, a fixing block, and a second rack. The baffle is installed inside the feeding pipe, and the connecting rod, which passes through the feeding pipe, is installed on the baffle. The second gear is fixedly connected to the connecting rod. The limiting frame is installed on the slide rail, and the fixing block, which is rotatably connected to the connecting rod, is slidably installed on the limiting frame. The second rack, which meshes with the second gear, is installed on the two sliding blocks. When the pushing and flipping mechanism moves, it drives the baffle to flip. When the storage tank is connected to the feeding pipe, the baffle is in the open state. When the connection between the storage tank and the feeding pipe is terminated, the baffle is in the sealed state inside the feeding pipe, thus performing preliminary preheating of the alumina.

[0011] The working principle and beneficial effects of this solution are as follows:

[0012] When alumina needs to be fed into the electrolytic cell for preparation, it is transported to the storage tank through the feed pipe. After the baffle in the feed pipe rotates 90 degrees, the second rack disengages from the second gear. As the first gear gradually moves, the first rack begins to rotate, causing the storage tank on the shaft to rotate. When the storage tank rotates 90 degrees, the feed inlet of the storage tank is perpendicular to the feed inlet opened by the shell-breaking hammer on the crust layer. When the first gear drives the storage tank to rotate 180 degrees, the feed inlet of the storage tank is completely above the feed inlet on the crust layer. At this time, the alumina in the storage tank flows into the feed inlet, and the first hydraulic rod drives the shell-breaking hammer. The storage tank can be pressed against the inlet to reduce the height between the storage tank's discharge port and the crust layer's inlet, thus effectively reducing dust generated during the alumina's fall. Further pressing of the storage tank by the shell-breaking hammer pushes the discharge port into the inlet, further preventing alumina dust during the feeding process. Traditional feeding methods directly transport alumina to the inlet using a discharge pipe without any deceleration mechanism. Under gravity, the alumina undergoes intense friction with the air, causing a large amount of fine particles to escape into the working environment. Using a storage tank for secondary transfer ensures stable alumina transport and reduces dust generation.

[0013] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0015] Figure 2 The embodiment is shown in the schematic diagram of the pushing and flipping mechanism and the discharge structure;

[0016] Figure 3 An exploded view of the flipping mechanism is provided for this embodiment.

[0017] Figure 4 This is a cross-sectional view of an embodiment;

[0018] Figure 5 This is a magnified view of a portion of point A in the embodiment;

[0019] Figure 6 This is a magnified view of a portion of point B in the embodiment;

[0020] Figure 7 This is a magnified view of a portion of point C in the embodiment;

[0021] Figure 8 This is a magnified view of a portion at point D in the embodiment;

[0022] Figure 9 This is a schematic diagram of the structure of the first gear, storage tank, and rotating shaft.

[0023] The following are the markings in the attached diagram: Electrolytic cell 1, crust layer 2, first hydraulic rod 3, shell-breaking hammer head 4, slide rail 5, first rack 6, fixed platform 8, second hydraulic rod 9, first wedge block 10, second wedge block 11, sliding frame 12, sliding block 13, rotating shaft 14, storage tank 15, first gear 16, discharge pipe 17, storage box 18, discharge port 19, baffle 20, valve device 21, connecting rod 22, second gear 23, fixed block 24, second rack 25, spring 26, slide groove 27, limit frame 28. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method:

[0025] Example

[0026] like Figures 1 to 9 As shown, a continuous alumina feeding device for an aluminum electrolysis cell 1 is disclosed, including an electrolysis cell 1, a crust layer 2, a first hydraulic rod 3, a shell-breaking hammer 4, a slide rail 5, a spring 26, a first rack 6, two pushing and turning mechanisms, and two discharging mechanisms. The electrolysis cell 1 contains the crust layer 2. The first hydraulic rod 3 is mounted on the electrolysis cell 1, with its telescopic end facing the crust layer 2. The shell-breaking hammer 4 is fixedly connected to the telescopic end of the first hydraulic rod 3. Slide grooves 27 are formed on two opposite inner sidewalls of the electrolysis cell 1. The slide rail 5 is slidably mounted within the slide grooves 27. A spring 26 is mounted at the lower end of the slide rail 5, located between the slide rail 5 and the slide grooves 27. The first rack 6 is fixedly connected to the slide rail 5. Two pushing and turning mechanisms are mounted on the slide rail 5 to transport alumina to the crust layer 2. Two discharging mechanisms are mounted on the electrolysis cell 1 to transport alumina to the two pushing and turning mechanisms. Figure 1 and Figure 2 As shown.

[0027] The pushing and flipping mechanism includes a fixed platform 8, a second hydraulic rod 9, a first wedge block 10, a second wedge block 11, a sliding frame 12, two sliding blocks 13, two rotating shafts 14, a storage tank 15, and a first gear 16. The fixed platform 8 is fixedly connected to the electrolytic cell 1. The second hydraulic rod 9 is mounted on the fixed platform 8. The telescopic end of the second hydraulic rod 9 penetrates the electrolytic cell 1. The first wedge block 10 is mounted on the telescopic end of the second hydraulic rod 9. The second wedge block 11 is slidably mounted on the first wedge block 10. The second wedge block 11 is fixedly connected to... A sliding frame 12 has two sliding blocks 13 mounted on it. Both sliding blocks 13 are slidably mounted within a slide rail 5. Two rotating shafts 14 are mounted on opposite sidewalls of the two sliding blocks 13, and are slidably connected to the two sliding blocks 13. A storage tank 12 is fixedly connected between the two rotating shafts 14. A discharge port 19 is provided on the storage tank 12, extending into its interior. A first gear 16 is mounted on each of the two rotating shafts 14, meshing with a first rack 6. Figure 3 , Figure 4 , Figure 8 and Figure 9 As shown.

[0028] The discharge mechanism includes a storage tank 18, a valve device 21, a discharge pipe 17, and a control device. The electrolytic cell 1 is equipped with a storage tank 18, and a discharge pipe 17 is installed on the storage tank 18. The valve device 21 is installed inside the storage tank 18 to control whether alumina enters the discharge pipe 17. The valve device 21 is existing technology. One end of the discharge pipe 17 passes through the storage tank 18, and the other end is attached to the storage tank. The discharge pipe 17 is connected to a discharge port 19. A control device is installed on the discharge pipe 17 to control the alumina within the discharge pipe 17. Figure 4 , Figure 5 and Figure 6 As shown.

[0029] The control device includes a baffle 20, a connecting rod 22, a fixing block 24, a limiting frame 28, a second gear 23, and a second rack 25. A baffle 20 is installed inside the feed pipe 17, and a connecting rod 22 is mounted on the baffle 20. One end of the connecting rod 22 is fixedly connected to the baffle 20, and the other end of the connecting rod 22 passes through the feed pipe 17. A fixing block 24 is mounted on the other end of the connecting rod 22, and the fixing block 24 is rotatably connected to the connecting rod 22. A limiting frame 28 is mounted on the fixing block 24, and the fixing block 24 is slidably positioned within the limiting frame 28. The limiting frame 28 is fixedly connected to a slide rail 5. A second rack 25 is fixedly connected to two sliding blocks 13, and the second rack 25 meshes with the second gear 23. Figure 6 and Figure 7 As shown.

[0030] In practice

[0031] When alumina needs to be fed into the electrolytic cell 1 for preparation, firstly, valve device 21 is opened to transport the alumina in storage tank 18 to the feed pipe 17. At this time, baffle 20 is open in the feed pipe 17, and the alumina in the feed pipe 17 can flow directly into storage tank 15. After the storage tank 15 is filled with alumina, valve device 21 in storage tank 18 is closed to stop the transport of alumina into the feed pipe 17. At this time, the second hydraulic rod 9 on the fixed platform 8 is activated. The telescopic end of the second hydraulic rod 9 moves towards the side closer to the shell-beating hammer head 4. When the hydraulic rod starts working, it will drive the first wedge block 10 to move. The first wedge block 10 will push the second wedge block 11 to move. At this time, the second wedge block 11 will push the sliding frame 12 to move. The sliding frame 12 will push the sliding block 13 to slide in the slide rail 5. When the sliding block 13 starts to move, it will drive the first wedge block 10 to move. When the rotating shaft 14, storage tank 15, and first gear 16 move, the second rack 25 on the sliding block 13 will also start to move. Since the second gear 23 is meshed on the second rack 25, when the second rack 25 starts to move, it will drive the second gear 23 to rotate. When the second gear 23 rotates, it will drive the connecting rod 22 to rotate on the fixed block 24. When the connecting rod 22 starts to rotate, it will drive the baffle 20 in the feed pipe 17 to rotate 90 degrees, thus closing the feed pipe 17. At this time, the feed pipe 17 is in a closed state. The valve device 21 is activated to pre-feed the alumina to be prepared next time into the feed pipe 17 for preheating treatment. Since the preparation temperature in the electrolytic cell 1 is about 900 degrees Celsius, the alumina in the feed pipe 17 can be preheated by the temperature emitted from the electrolytic cell 1, making the subsequent reaction with the electrolytic cell 1 more efficient and complete.

[0032] After the baffle 20 rotates 90 degrees, the second rack 25 stops meshing with the second gear 23. At this time, the sliding frame 12 is in a continuous moving state. During the movement of the sliding frame 12, the first gear 16 will gradually contact the first rack 6. Since the first gear 16 and the first rack 6 are meshed, as the first gear 16 gradually moves, it starts to rotate through the first rack 6. When the first gear 16 starts to rotate, it will drive the storage tank 15 on the rotating shaft 14 to rotate. When the storage tank 15 rotates 90 degrees, the storage tank 15... The discharge port 19 is perpendicular to the feed inlet on the crust layer 2 opened by the shell-beating hammer 4. At this time, the shell-beating hammer 4 is lifted by the first hydraulic rod 3 without interfering with the movement of the storage tank 15 to discharge material. After the first gear 16 drives the storage tank 15 to rotate 180 degrees, the discharge port 19 of the storage tank 15 is completely above the feed inlet on the crust layer 2. At this time, the alumina in the storage tank 15 begins to flow into the feed inlet. At this time, the first hydraulic rod 3 drives the shell-beating hammer 4 to press the storage tank 15 towards the feed inlet. Due to the first wedge block on the second hydraulic rod 9 The ten wedges limit the left and right movement of the second wedge 11, but do not restrict its up and down movement. When the hammer head 4 begins to press down on the storage tank 15, the storage tank 15 transmits pressure to the slide rail 5. At this time, the slide rail 5 moves downward within the slide groove 27 to compress the spring 26. The limiting frame 28 on the slide rail 5 will move downward with the slide rail 5. However, since the fixed block 24 and the limiting frame 28 are slidably connected, the position of the fixed block 24 remains unchanged when the limiting frame 28 moves downward. The limiting frame 28 continuously limits the fixed block 24. When the hammer head 4 further presses against the storage tank 15, it pushes the discharge port 19 of the storage tank 15 into the inlet, which can more effectively prevent alumina dust from being emitted during the feeding process. Traditional feeding methods directly transport alumina to the inlet using the discharge pipe 17 without any mechanism to slow down the alumina. Under the influence of gravity, the alumina violently rubs against the air, causing a large amount of fine particles to escape into the working environment. By using the storage tank 15 for secondary transfer, the alumina is transported smoothly, reducing the dust problem.

[0033] After the alumina in the storage tank 15 has completely flowed into the feed inlet, the spring 26 under the slide rail 5 is in a compressed state. When the shell-breaking hammer 4 stops pressing against the storage tank 15, the spring 26 releases its elastic potential energy and lifts the slide rail 5 to its original height. At this time, the second wedge block 11 reconnects with the first wedge block 10, and the second hydraulic rod 9 begins to drive the sliding frame 12 to retract to one side of the feed pipe 17. After the storage tank 15 moves out of the feed inlet, the first hydraulic rod 3 drives the shell-breaking hammer 4 to further push the alumina in the feed inlet to the crust layer. 2. Internal reaction: During the movement of the sliding frame 12, the first gear 16 rotates 180 degrees through the first rack 6. At this time, the storage tank 15 also rotates back to its initial state and realigns with the discharge pipe 17. During the movement, the second rack 25 gradually drives the second gear 23 to rotate. When the second gear 23 rotates, it will drive the baffle 20 to rotate 90 degrees again to limit the alumina in the discharge pipe 17. The alumina will then enter the storage tank 15. The sliding frame 12 is continuously reciprocated by the second hydraulic rod 9 to achieve continuous feeding.

[0034] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. An aluminium reduction cell alumina continuous draw-off device characterised by: The device includes an electrolytic cell, a crust layer, a first hydraulic rod, a shell-breaking hammer, a slide rail, a spring, a first rack, two pushing and turning mechanisms, and two discharging mechanisms. The crust layer is disposed inside the electrolytic cell. The first hydraulic rod rotates through the electrolytic cell, and the shell-breaking hammer is fixedly connected to the telescopic end of the first hydraulic rod. The slide rail is disposed inside the electrolytic cell and is slidably engaged in grooves opened on two opposite inner sidewalls of the electrolytic cell. The spring is disposed between the grooves and the slide rail. The first rack is disposed on the slide rail. The two pushing and turning mechanisms for conveying alumina to the crust layer are disposed on the slide rail. The two discharging mechanisms for conveying alumina to the two pushing and turning mechanisms are disposed on the electrolytic cell.

2. The continuous alumina draw device for an aluminum reduction cell of claim 1, wherein: The pushing and flipping mechanism includes a second hydraulic rod, a fixed platform, a first wedge block, and a second wedge block. The second hydraulic rod passes through the electrolytic cell, and the fixed platform is provided between the second hydraulic rod and the electrolytic cell. The first wedge block is fixedly connected to the telescopic end of the second hydraulic rod, and the second wedge block slides through the first wedge block.

3. An alumina continuous draw device for an aluminum reduction cell as defined in claim 2, characterized in that: The pushing and flipping mechanism further includes a sliding frame, two sliding blocks, two rotating shafts, a storage tank, and a first gear. The second wedge block is fixedly connected to the sliding frame. The sliding frame is slidably mounted in the slide rail through the sliding blocks. Two rotating shafts are respectively arranged between the two sliding blocks. The storage tank is fixedly connected between the two rotating shafts. The storage tank has a discharge port that penetrates the interior. The two rotating shafts are provided with the first gear that can mesh with the first rack.

4. An alumina continuous draw device for an aluminum reduction cell as defined in claim 3, characterized in that: The discharge mechanism includes a storage tank, a valve device, a discharge pipe, and a control device. The storage tank is installed on the electrolytic cell, and the valve control device is installed inside the storage tank. The discharge pipe, which can communicate with the discharge port, is installed on the storage tank, and the control device for sealing alumina is installed inside the discharge pipe.

5. An alumina continuous draw device for an aluminum reduction cell as defined in claim 4, characterized in that: The control device includes a baffle, a connecting rod, a second gear, a limiting frame, a fixing block, and a second rack. The baffle is installed inside the feed tube, and the connecting rod is installed on the baffle, penetrating the feed tube. The second gear is fixedly connected to the connecting rod. The limiting frame is installed on the slide rail, and the fixing block, which is rotatably connected to the connecting rod, is slidably installed on the limiting frame. The second rack, which meshes with the second gear, is installed on the two sliding blocks.

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