Fluorinated salt feeding device for aluminum electrolysis
By designing the first and second fragmented structures in aluminum electrolyte with fluoride salt and feed devices, cutting and crushing the binding of the fluoride salt, the problem of blocking the block in the storage tank caused by the block of the salt The effective segmentation and use of fluoride salt.
Patent Information
- Application Number
- CN202420894089.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-04-25
AI Technical Summary
During the aluminum electrolysis production process, bulk fluoride salts are prone to agglomeration, resulting in blockage at the outlet of the storage tank.
Design an aluminum electrolyte with fluoride salt and feed devices, including the first and second fragmented material structures. The first fragmentation structure consists of a split bar that is extended along the radius. It is used to cut and crush the block of fluoride salt in the salt salt storage tank.
By crushing the lumps of fluoride salt blocks to form a fluoride salt that is approximately powder, to prevent blocking at the exit of the primer of the tank in the tank of the tank, and ensure that most of the fluoride salt can be put into storage Use in the tank.
Smart Images
Figure CN222411895U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of aluminum smelting, and in particular to a fluoride salt feeding device for aluminum electrolysis. Background Art
[0002] In the aluminum electrolysis production process, fluoride salts need to be added during the electrolysis reaction in the electrolytic cell. In the related art, fluoride salts are usually added into the electrolytic cell through a fluoride salt feeding device.
[0003] However, in the production process, it is sometimes necessary to add bulk fluoride salts. Since bulk fluoride salts are prone to agglomeration during storage, when adding bulk fluoride salts to the fluoride salt storage tank of the fluoride salt adding device, the blocky fluoride salts can easily cause blockage at the outlet of the feeder of the storage tank. Utility Model Content
[0004] The present application provides a fluoride salt feeding device for aluminum electrolysis, which can split and crush blocky fluoride salt to prevent the blocky fluoride salt from causing blockage at the outlet of the feeder of the storage tank.
[0005] Specifically, a fluoride salt feeding device for aluminum electrolysis comprises: a fluoride salt storage tank, the fluoride salt storage tank comprises a first part and a second part located below the first part, the first part extends vertically, the top of the first part is set as a feeding port, the second part is connected to the first part and extends inwardly inclined, and the bottom of the second part is set as a discharge port; a feed pipe, located below the fluoride salt storage tank and connected to the discharge port; a feed chute, located below the fluoride salt storage tank, the feed chute has a feed cavity, and a breathable plate extending along the transport direction of the feed chute is arranged in the feed cavity, the The air-permeable plate defines the feed cavity as an upper material flow channel and a lower air chamber, the material flow channel is connected to the discharge pipe, the feed chute is provided with a discharge port connected to the material flow channel, and a discharger is correspondingly provided below the discharge port; an air supply pipe is connected to the air chamber; a first crushing structure is connected to the inner wall of the first part, the first crushing structure includes a plurality of dividing strips, and the dividing strips extend radially along the fluoride salt storage tank; a second crushing structure is connected to the inner wall of the second part, the second crushing structure includes a plurality of spaced crushing teeth, and the length of the dividing strips is greater than the length of the crushing teeth.
[0006] In some embodiments, a plurality of the dividing strips are arranged vertically.
[0007] In some embodiments, projections of the plurality of dividing strips on a horizontal plane are arranged along the circumference of the fluoride salt storage tank.
[0008] In some embodiments, projections of the plurality of dividing strips on the horizontal plane partially overlap.
[0009] In some embodiments, the first crushing structure comprises a first mounting plate, the first mounting plate is detachably connected to the inner wall of the first portion, and the plurality of dividing strips are mounted on the first mounting plate.
[0010] In some embodiments, the second crushing structure comprises a second mounting plate, the second mounting plate is detachably connected to the inner wall of the second portion, and the plurality of crushing teeth are mounted on the second mounting plate.
[0011] In some embodiments, the material flow channel is provided with a filter screen, the filter screen is located below the bottom opening of the feed pipe, and the filter screen is connected to the feed chute.
[0012] In some embodiments, the filter screen is connected to the feed chute via an elastic member, the elastic member is vertically arranged, the upper end of the elastic member is connected to the feed chute, and the lower end of the elastic member is connected to the feed chute.
[0013] In some embodiments, the elastic member is a spring.
[0014] In some embodiments, the feed pipe extends vertically.
[0015] The beneficial effects of the present application are as follows: when bulk fluoride salt is fed into the fluoride salt storage tank through the feeding port, the fluoride salt blocks that have been compacted into large pieces will be cut and broken into small pieces by the dividing strips in the first crushing structure during the free fall process. After the small pieces of fluoride salt fall on the second crushing structure, they roll downward along the second crushing structure and are cut and broken again by the crushing teeth to form fluoride salt that is approximately in powder form, thereby preventing the blocky fluoride salt from causing blockage at the outlet of the storage tank feeder. In addition, compared with setting a filter at the discharge port, which will cause a large amount of blocky fluoride salt to be unable to be fed into the fluoride salt storage tank, the present application can cut and break the agglomerated fluoride salt blocks in the fluoride salt storage tank by setting the first crushing structure and the second crushing structure, and can prevent the blocky fluoride salt from causing blockage at the outlet of the storage tank feeder, so that most of the fluoride salt can be put into the fluoride salt storage tank for use. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 This is a schematic diagram of the structure of a fluoride salt feeding device for aluminum electrolysis in one embodiment of the present application;
[0018] Figure 2 It is a schematic top view of a fluoride salt storage tank in one embodiment of the present application.
[0019] Reference numerals:
[0020] 10. Fluoride salt storage tank; 11. First part; 12. Second part; 20. Feeding pipe; 30. Feeding chute; 31. Feeding cavity; 311. Material flow channel; 312. Air chamber; 40. Air supply pipe; 50. Breathable plate; 60. Feeder; 70. First crushing structure; 71. Dividing strip; 72. First mounting plate; 80. Second crushing structure; 81. Crushing teeth; 82. Second mounting plate; 91. Filter; 92. Elastic member. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0022] A fluoride salt feeding device for aluminum electrolysis, such as Figure 1 and Figure 2 As shown, the fluoride salt feeding device for aluminum electrolysis includes a fluoride salt storage tank 10, a feed pipe 20, a feed chute 30 and an air supply pipe 40.
[0023] The fluoride salt storage tank 10 includes a first part 11 and a second part 12 located below the first part 11. The first part 11 extends vertically, and the top of the first part 11 is set as a feeding port. The second part 12 is connected to the first part 11 and extends inwardly. The bottom of the second part 12 is set as a discharge port. The feed pipe 20 is located below the fluoride salt storage tank 10 and is connected to the discharge port. The feed chute 30 is located below the fluoride salt storage tank 10. The feed chute 30 has a feed cavity 31, in which a breathable plate 50 extending along the transport direction of the feed chute 30 is arranged. The breathable plate 50 defines the feed cavity 31 as an upper material flow channel 311 and a lower air chamber 312. The material flow channel 311 is connected to the discharge pipe 20. The feed chute 30 is provided with a discharge port connected to the material flow channel 311, and a discharge device 60 is correspondingly arranged below the discharge port; the air supply pipe 40 is connected to the air chamber 312.
[0024] It should be noted that the fluoride salt storage tank 10 is used to store fluoride salt. The first part 11 can be cylindrical, and the second part 12 can be a hole-shaped with a wide top and a narrow bottom. Bulk fluoride salt is put into the fluoride salt storage tank 10 through the feeding port, and the fluoride salt flows to the discharge pipe 20 through the discharge port, and flows into the feeding chute 30 through the discharge pipe 20. The feeding air enters the air chamber 312 through the air supply pipe 40, and then enters the upper material flow channel 311 through the air permeable plate 50, so that the fluoride-carrying aluminum oxide in the material flow channel 311 is fluidized and moves forward. The setting of the air permeable plate 50 makes The material in the upper material flow channel 311 is uniformly fluidized, and a material column difference is established along the conveying direction. When the power generated by the material column difference is sufficient to overcome the friction resistance of the fluid flow, the fluidized material flows forward to complete the conveying task. At the same time, the fluoride salt is fed into the material flow channel 311 through the discharge pipe 20, and is continuously mixed with the fluorine-carrying alumina in the material flow channel 311, and is conveyed forward with the fluorine-carrying alumina. The mixed material in the main chute is conveyed to each discharge port under a certain air supply pressure. When feeding is needed, the discharge device 60 is started and feeding is carried out according to the designed feeding amount.
[0025] Specifically, the fluoride salt feeding device for aluminum electrolysis also includes a first crushing structure 70 and a second crushing structure 80. The first crushing structure 70 is connected to the inner wall of the first part 11, and the first crushing structure 70 includes a plurality of dividing strips 71, and the dividing strips 71 extend radially along the fluoride salt storage tank 10; the second crushing structure 80 is connected to the inner wall of the second part 12, and the second crushing structure 80 includes a plurality of crushing teeth 81 distributed at intervals.
[0026] It is understood that when the bulk fluoride salt is fed into the fluoride salt storage tank 10 through the feeding port, the fluoride salt blocks that are compacted into large pieces will be cut and broken into small pieces by the dividing strips 71 in the first crushing structure 70 during the free fall process. After the small pieces of fluoride salt fall on the second crushing structure 80, they roll downward along the second crushing structure 80 and are cut and broken again by the crushing teeth 81 to form fluoride salt in a nearly powdered state, thereby preventing the blocky fluoride salt from causing the feeder 60 of the storage tank to break. In addition, compared with setting a filter at the discharge port, which will cause a large amount of block fluoride salt to be unable to be put into the fluoride salt storage tank 10, the present application can cut and break the agglomerated fluoride salt blocks in the fluoride salt storage tank 10 by setting the first crushing structure 70 and the second crushing structure 80, and can prevent the block fluoride salt from causing blockage at the outlet of the feeder 60 of the storage tank, so that most of the fluoride salt can be put into the fluoride salt storage tank 10 for use.
[0027] Furthermore, the length of the splitting strip 71 is greater than the length of the crushing teeth 81, which can reduce the space occupied by the crushing teeth 81, and prevent the crushing teeth 81 from making the inner aperture of the second part 12 too small, resulting in the second part 12 being blocked by fluoride salt. Furthermore, the spacing between two adjacent splitting strips 71 is greater than the spacing between two adjacent crushing teeth 81, and the distribution of the crushing teeth 81 is relatively dense, which can improve the crushing effect of the crushing teeth 81 on the fluoride salt block.
[0028] In one embodiment, a plurality of splitting bars 71 are arranged vertically, so that the fluoride salt block can collide with more splitting bars 71 during free fall, thereby improving the splitting effect of the fluoride salt block.
[0029] In one embodiment, the projections of the plurality of splitting bars 71 on the horizontal plane are arranged along the circumference of the fluoride salt storage tank 10, so that the fluoride salt blocks falling along different motion trajectories can be split by the splitting bars 71. Furthermore, the projections of the plurality of splitting bars 71 on the horizontal plane partially overlap, so as to prevent a large number of fluoride salt blocks from falling from the gaps between the splitting bars 71 without being split by the splitting bars 71.
[0030] Continue to see Figure 1 As shown, in one embodiment, the first crushing structure 70 includes a first mounting plate 72, which is detachably connected to the inner wall of the first part 11, and a plurality of split strips 71 are mounted on the first mounting plate 72. It is understood that the first mounting plate 72 can be mounted on the inner wall of the first part 11 by a detachable connection direction such as bolt connection or clamping. When the inside of the fluoride salt storage tank 10 needs to be inspected or the split strip 71 is damaged, the first crushing structure 70 can be disassembled, making the inspection of the fluoride salt storage tank 10 and the replacement of the split strip 71 more convenient. Among them, the split strip 71 can be mounted on the first mounting plate 72 by welding, bolt connection or riveting.
[0031] In one embodiment, the second crushing structure 80 includes a second mounting plate 82, which is detachably connected to the inner wall of the second part 12, and a plurality of crushing teeth 81 are mounted on the second mounting plate 82. It is understood that the second mounting plate 82 can be mounted on the inner wall of the second part 12 by a detachable connection direction such as bolt connection or clamping. When the inside of the fluoride salt storage tank 10 needs to be inspected or the second crushing structure 80 is damaged, the second crushing structure 80 can be disassembled, making the inspection of the fluoride salt storage tank 10 and the replacement of the second crushing structure 80 more convenient. Among them, the crushing teeth 81 can be mounted on the second mounting plate 82 by welding, bolt connection or riveting.
[0032] Continue to see Figure 1As shown, in one embodiment, the material flow channel 311 is provided with a filter screen 91, which is located below the bottom opening of the feed tube 20, connected to the feed chute 30, and covered with filter holes. The fluoride salt discharged from the bottom opening of the feed tube 20 will first fall on the filter screen 91, and the powdered fluoride salt or fluoride salt particles with a smaller particle size can pass through the filter holes and fall below the filter screen 91, while the fluoride salt blocks with a larger size will be intercepted by the filter screen 91 to prevent the fluoride salt blocks from blocking the outlet of the feeder 60. The material of the filter screen 91 and the specific size of the filter holes can be selected according to actual needs.
[0033] Furthermore, the filter screen 91 is connected to the feeding chute 30 through an elastic member 92, and the elastic member 92 is arranged vertically, and the upper end of the elastic member 92 is connected to the feeding chute 30, and the lower end of the elastic member 92 is connected to the feeding chute 30, so that when the fluoride salt falls onto the filter screen 91, the filter screen 91 can shake up and down under the impact of the fluoride salt, which can improve the filtering efficiency and prevent a large amount of fluoride salt from accumulating on the filter screen 91 and causing the filter holes to be blocked. Further, the elastic member 92 is a spring.
[0034] Furthermore, the feed pipe 20 extends vertically, which can increase the impact force when the fluoride salt falls onto the filter screen 91.
[0035] It should also be noted that, in one embodiment, a switch valve such as an electric butterfly valve may be provided in the feed pipe 20, and the feeding ratio of the fluoride salt and the fluorine-loaded alumina may be controlled by controlling the opening ratio of the electric butterfly valve.
[0036] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A fluoride salt feeding device for aluminum electrolysis, characterized in that: include: A fluoride salt storage tank, the fluoride salt storage tank comprising a first part and a second part located below the first part, the first part extending vertically, the top of the first part being set as a feeding port, the second part being connected to the first part and extending inwardly obliquely, and the bottom of the second part being set as a discharging port; A discharge pipe, located below the fluoride salt storage tank and connected to the discharge port; A feeding chute is located below the fluoride salt storage tank, the feeding chute has a feeding cavity, a breathable plate extending along the feeding direction of the feeding chute is arranged in the feeding cavity, the breathable plate defines the feeding cavity as an upper material flow channel and a lower air chamber, the material flow channel is connected with the discharge pipe, the feeding chute is provided with a discharge port connected with the material flow channel, and a discharger is correspondingly arranged below the discharge port; an air supply pipe, connected to the air chamber; A first crushing structure connected to the inner wall of the first part, wherein the first crushing structure comprises a plurality of dividing strips, and the dividing strips extend radially along the fluoride salt storage tank; The second crushing structure is connected to the inner wall of the second part, and the second crushing structure includes a plurality of crushing teeth distributed at intervals, and the length of the dividing strip is greater than the length of the crushing teeth.
2. The fluoride salt feeding device for aluminum electrolysis according to claim 1, characterized in that: The plurality of dividing strips are arranged vertically.
3. The fluoride salt feeding device for aluminum electrolysis according to claim 1, characterized in that: The projections of the plurality of dividing strips on the horizontal plane are arranged along the circumference of the fluoride salt storage tank.
4. The fluoride salt feeding device for aluminum electrolysis according to claim 3, characterized in that: The projections of the plurality of dividing strips on the horizontal plane partially overlap.
5. The fluoride salt feeding device for aluminum electrolysis according to claim 1, characterized in that: The first material-crushing structure comprises a first mounting plate, the first mounting plate is detachably connected to the inner wall of the first part, and a plurality of the dividing strips are mounted on the first mounting plate.
6. The fluoride salt feeding device for aluminum electrolysis according to claim 1, characterized in that: The second crushing structure comprises a second mounting plate, the second mounting plate is detachably connected to the inner wall of the second part, and the plurality of crushing teeth are mounted on the second mounting plate.
7. The fluoride salt feeding device for aluminum electrolysis according to claim 1, characterized in that: The material flow channel is provided with a filter screen, the filter screen is located below the bottom opening of the feed pipe, and the filter screen is connected to the feed chute.
8. The fluoride salt feeding device for aluminum electrolysis according to claim 7, characterized in that: The filter screen is connected to the feeding chute via an elastic member, the elastic member is arranged vertically, the upper end of the elastic member is connected to the feeding chute, and the lower end of the elastic member is connected to the feeding chute.
9. The fluoride salt feeding device for aluminum electrolysis according to claim 8, characterized in that: The elastic member is a spring.
10. The fluoride salt feeding device for aluminum electrolysis according to claim 8, characterized in that: The feed pipe extends vertically.