A pretreatment device for aluminum electrolytic cells
By designing a pretreatment device for aluminum electrolysis cells, the aluminum fluoride powder is pretreated using a stirring rod and a heater, which solves the problem of clogging at the feed port caused by the agglomeration of cold aluminum fluoride, and achieves uniform mixing of powder and stability of the electrolysis process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGYUAN HONGCHANGSHENG ALUMINUM CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-03
AI Technical Summary
Traditional aluminum fluoride cold feedstock is prone to clumping during transportation, which can cause blockage at the electrolytic cell discharge port and affect the molecular ratio adjustment.
Design a pretreatment device for aluminum electrolytic cells, including a tank, a stirring rod, a heater and a discharge pipe, to pretreat aluminum fluoride powder by stirring and heating to prevent agglomeration, and to uniformly mix it with alumina powder during discharge.
This effectively prevents blockage at the electrolytic cell feed port, improves the mixing uniformity of aluminum fluoride powder and alumina powder, and ensures stable operation of the electrolysis process.
Smart Images
Figure CN224450877U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aluminum electrolysis cell technology, and specifically to a pretreatment device for aluminum electrolysis cells. Background Technology
[0002] Currently, in the low-temperature production process of aluminum electrolysis cells, the traditional aluminum fluoride cold material, due to its own certain humidity, will clump together during transportation, causing blockage at the feed port of the electrolysis cell, and ultimately affecting the adjustment of the molecular ratio in low-temperature electrolysis. Utility Model Content
[0003] This invention addresses the problem of delayed molecular ratio adjustment caused by the easy blockage of the electrolytic cell discharge port during the transportation of traditional cold aluminum fluoride powder. It provides a pretreatment device for aluminum electrolytic cells that can preheat aluminum fluoride powder in advance, thus preventing blockage at the electrolytic cell discharge port due to agglomeration of aluminum fluoride powder during transportation.
[0004] The technical solution adopted in this utility model is:
[0005] A pretreatment apparatus for an aluminum electrolytic cell is provided, comprising:
[0006] The enclosure comprises: a box with a feed inlet at the top and a discharge outlet at the bottom; a first motor located at the top of the enclosure, with a first rotating rod at its output end, the other end of which extends into the interior of the enclosure; multiple stirring rods circumferentially arranged on the outer wall of the first rotating rod, with the central axis of the first rotating rod as the axis of rotation; multiple striking rods circumferentially arranged on the inner wall of the enclosure, with gaps between adjacent striking rods; a heater located on the inner wall of the enclosure, with one heater between every two adjacent striking rods; a discharge pipe, one end of which is connected to the discharge outlet of the enclosure, and the other end of which is connected to the discharge outlet of the electrolytic cell; and a first air pump located between the discharge pipe and the discharge outlet of the electrolytic cell for conveying powder. Each stirring rod is located between two adjacent striking rods.
[0007] Optionally, the discharge pipe is inclined at its own central axis toward the central axis of the electrolytic cell discharge port.
[0008] Optionally, the extended line of the central axis of the discharge pipe does not intersect with the central axis of the discharge port of the electrolytic cell.
[0009] Optionally, a transition pipe is provided between the discharge port of the box and the discharge pipe, the side wall of the discharge pipe and the transition pipe are connected, one end of the transition pipe is open and connected to the discharge port of the box, and the other end of the transition pipe is closed; a second motor is provided at one end of the transition pipe, a second rotating rod is provided at the output end of the second motor, and spiral blades are provided circumferentially on the outer wall of the second rotating rod.
[0010] Optionally, the inner bottom of the box is sloped.
[0011] Optionally, the central axis of the stirring rod near the bottom of the first rotating rod is inclined to the central axis of the first rotating rod.
[0012] Optionally, a sleeve is fitted on the outer wall of the discharge pipe, a placement cavity is opened inside the side wall of the sleeve, a heating wire is installed inside the placement cavity, and a power source for heating the heating wire is provided on the outer wall of the sleeve.
[0013] Optionally, a first air inlet is provided on the side wall of the discharge pipe, a second air inlet is provided on the side wall of the transition pipe, a nitrogen gas source box is provided on the outer wall of the transition pipe, an exhaust pipe is provided between the nitrogen gas source box and the first and second air inlets, and a second air pump is provided on each exhaust pipe.
[0014] The beneficial effects of this utility model are:
[0015] 1. By setting up a box, a first motor is set on the top of the box to drive the first rotating rod to rotate. The stirring rod on the outer wall of the first rotating rod can stir the aluminum fluoride powder that enters the box. During the stirring process of the aluminum fluoride powder, the heater on the box can simultaneously heat the aluminum fluoride powder to achieve the preheating effect of the aluminum fluoride powder.
[0016] 2. By setting multiple striking rods on the inner wall of the box, when the first motor runs, the first motor drives the first rotating rod to rotate. When the stirring rod on the outer wall of the first rotating rod stirs the aluminum fluoride powder, the agglomerated aluminum fluoride powder will come into contact with the striking rod under the action of the stirring rod, so that the agglomerated aluminum fluoride powder can be further broken into smaller aluminum fluoride powder for use.
[0017] 3. By connecting the discharge pipe with the electrolytic cell discharge port, the preheated aluminum fluoride cold material moves towards the electrolytic cell discharge port under the drive of the first air pump. After the aluminum fluoride cold material enters the electrolytic cell discharge port, it mixes with the normally discharged alumina powder before being discharged, which can increase the uniform mixing of aluminum fluoride cold material and alumina powder. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic front view of a pretreatment device using an aluminum electrolytic cell disclosed in this embodiment;
[0020] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;
[0021] Figure 3 for Figure 1 A magnified view of a portion of point B in the middle;
[0022] Figure 4 This is a top view of the connection between the discharge pipe and the lower discharge port of the electrolytic cell.
[0023] Figure label:
[0024] 1-First motor, 10-First rotating rod, 11-Stirring rod;
[0025] 2-Box body, 20-Inlet, 21-Outlet, 22-Heater;
[0026] 3-Transition tube, 30-Second motor, 31-Second rotating rod, 32-Helical blade, 33-First air outlet;
[0027] 4-Discharge pipe, 40-Second air inlet;
[0028] 5-First air pump;
[0029] 6-Electrolytic cell discharge port;
[0030] 7-Nitrogen gas source box;
[0031] 8-Second air pump;
[0032] 9-Sleeve, 90-Placement cavity, 91-Heating wire, 92-Power supply. Detailed Implementation
[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are 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 are not intended to 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.
[0034] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.
[0035] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.
[0036] Example
[0037] Please see Figure 1-4As shown, this embodiment discloses a pretreatment device for an aluminum electrolysis cell, including a housing 2, a first motor 1, multiple striking rods, a heater 22, a discharge pipe 4, and a first air pump 5. Specifically, the first motor 1 is located at the top of the housing 2, and a first rotating rod 10 is installed on the output end of the first motor 1. Multiple stirring rods 11 are installed on the outer wall of the first rotating rod 10, and the multiple stirring rods 11 are circumferentially distributed around the central axis of the first rotating rod 10. The multiple striking rods are circumferentially distributed around the central axis of the first rotating rod 10 on the inner wall of the housing 2. It is worth noting that each stirring rod 11 is located between two adjacent striking rods. That is, when the first rotating rod 10 drives the multiple stirring rods 11 to rotate, the gap between the stirring rods 11 and the striking rods can strike the aluminum fluoride powder entering the housing 2, breaking the agglomerated aluminum fluoride powder into smaller particle sizes. The heater 22 is installed on the inner wall of the housing 2, with one heater 22 between every two adjacent striking rods. It's important to note that since there is a stirring rod 11 between adjacent striking rods, the stirring rod 11 and the striking rods will impact the aluminum fluoride powder. With the addition of the heater 22, the heater 22 will not interfere with the adjacent stirring rod 11. After the aluminum fluoride powder enters the housing 2, as the stirring rod 11 and the striking rods impact the aluminum fluoride powder, the operation of the heater 22 heats the aluminum fluoride powder entering the housing 2, thus achieving preheating of the aluminum fluoride powder. An inlet 20 and an outlet 21 are respectively provided at the top and bottom of the housing 2. The inlet 20 is used to feed aluminum fluoride powder into the interior of the housing 2, and the outlet 21 is used to discharge the aluminum fluoride powder that has been preheated by impact. A discharge pipe 4 is provided at the outlet 21 of the housing 2, and the other end of the discharge pipe 4 is connected to the discharge port 6 of the electrolytic cell. A first air pump 5 is provided on the discharge pipe 4. The first air pump 5 can transport the aluminum fluoride powder discharged from the housing 2 through the outlet 21 to the discharge port 6 of the electrolytic cell, so that the aluminum fluoride powder and the alumina powder discharged from the discharge port 6 of the electrolytic cell can be uniformly mixed. The first air pump 5 can be set on the housing 2 or in other locations to facilitate the transportation of aluminum fluoride powder.
[0038] Furthermore, the aforementioned discharge pipe 4 is inclined at its central axis to the central axis of the electrolytic cell inlet 6. Specifically, the aluminum fluoride powder discharged from the discharge port 21 inside the housing 2 is discharged through the discharge pipe 4 under the action of the first air pump 5. The discharged aluminum fluoride powder enters the electrolytic cell inlet 6, allowing the aluminum fluoride powder and alumina powder to be mixed more evenly before being discharged into the electrolytic cell. At the connection between the discharge pipe 4 and the electrolytic cell inlet 6, the central axis of the discharge pipe 4 is inclined at the central axis of the electrolytic cell inlet 6. That is, when the aluminum fluoride powder, after being preheated by impact, enters the electrolytic cell inlet 6, it can mix with the alumina powder in the electrolytic cell inlet 6 at a certain angle, improving the mixing degree between the alumina powder and the aluminum fluoride powder. This ensures that the alumina powder and aluminum fluoride powder can be evenly mixed as they continue to move at the electrolytic cell inlet 6.
[0039] Furthermore, the extended line of the central axis of the discharge pipe 4 does not intersect with the central axis of the electrolytic cell discharge port 6. Specifically, after the aluminum fluoride powder is preheated by impact in the box 2, it enters the electrolytic cell discharge port 6 through the discharge pipe 4 under the action of the first air pump 5. The aluminum fluoride powder entering the electrolytic cell discharge port 6 can form a swirling flow, and as the aluminum fluoride powder is continuously fed in, a swirling flow will continue to form in the electrolytic cell discharge port 6. Under the influence of the swirling flow, the aluminum fluoride powder and the alumina powder can be mixed more evenly.
[0040] A transition pipe 3 is provided between the discharge port 21 and the discharge pipe 4 of the aforementioned housing 2. One end of the transition pipe 3 is open and connected to the discharge port 21 of the housing 2, while the other end is closed. The connection between the discharge pipe 4 and the transition pipe 3 is located on the side wall of the transition pipe 3 near the closed end. A second motor 30 is provided on the closed end of the transition pipe 3, and a second rotating rod 31 is provided on the output end of the second motor 30. A spiral blade 32 is provided on the outer wall of the second rotating rod 31. That is, after the aluminum fluoride powder in the housing 2 has been preheated by impact, it will enter the interior of the transition pipe 3 through the discharge port 21 of the housing 2. At this time, the second motor 30 on the closed end of the transition pipe 3 runs, and the second motor 30 drives the second rotating rod 31 to rotate. When the second rotating rod 31 rotates, the aluminum fluoride powder in the transition pipe 3 is conveyed through the spiral blade 32 provided on the outer wall of the second rotating rod 31, thereby controlling the amount of aluminum fluoride powder entering the electrolytic cell discharge port 6. It is worth noting that, in order to facilitate the entry of aluminum fluoride powder into the transition tube 3, the transition tube 3 can be tilted. This step is a well-known technique to those skilled in the art, and will not be elaborated on here.
[0041] The inner bottom of the aforementioned box 2 is set as a slope. After the aluminum fluoride powder is preheated by the impact of the box 2, the aluminum fluoride powder will accumulate on the inner bottom of the box 2. At this time, setting the inner bottom of the box 2 as a slope can prevent the aluminum fluoride powder from accumulating on the inner bottom of the box 2, thus affecting the discharge of the aluminum fluoride powder.
[0042] Furthermore, the central axis of the stirring rod 11 located at the bottom of the first rotating rod 10 is inclined to the central axis of the first rotating rod 10. Specifically, since the bottom of the box 2 is inclined, the aluminum fluoride powder near the bottom of the box 2 will gradually increase. Therefore, the stirring rod 11 near the bottom of the box 2 is inclined so that the aluminum fluoride powder near the bottom of the box 2 can be better stirred and preheated.
[0043] A sleeve 9 is fitted onto the outer wall of the discharge pipe 4. A placement cavity 90 is formed inside the side wall of the sleeve 9, and a heating wire 91 is placed inside the placement cavity 90. A power source for heating the heating wire 91 is provided on the outer wall of the sleeve 9. That is, the power source can energize the heating wire 91, causing it to heat up. After the heating wire 91 heats up, the sleeve 9 transfers the heat to the interior of the discharge pipe 4, thereby performing a secondary preheating treatment on the passing aluminum fluoride powder. It should be noted that the power source can be located on the discharge pipe 4 or other convenient locations.
[0044] A first air inlet 33 is provided on the side wall of the discharge pipe 4, and a second air inlet 40 is provided on the side wall of the transition pipe 3. A nitrogen gas source box 7 is provided on the outer wall of the transition pipe 3. An exhaust pipe is provided connecting the nitrogen gas source box 7 to the first air inlet 33 and the second air inlet 40. A second air pump 8 is provided on each exhaust pipe. After the aluminum fluoride powder inside the box 2 is conveyed, in order to avoid residual aluminum fluoride powder in the discharge pipe 4 and the transition pipe 3, the second air pump 8 is operated. The second air pump 8 delivers nitrogen from the nitrogen gas source box 7 to the first air inlet 33 and the second air inlet 40 through the exhaust pipe. Then, the nitrogen blows from the discharge pipe 4 and the transition pipe 3 to backflush the accumulated aluminum fluoride powder, allowing the aluminum fluoride powder to enter the interior of the box 2 for subsequent processing. It should be noted that the second air pump 8 can be located on the outer wall of the transition pipe 3 or in another convenient location.
[0045] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A pretreatment device for an aluminum electrolysis cell, characterized in that, include: The box has a feed inlet at the top and a discharge outlet at the bottom; A first motor is located at the top of the housing. A first rotating rod is provided on the output end of the first motor. The other end of the first rotating rod extends into the interior of the housing. Multiple stirring rods are provided circumferentially on the outer wall of the first rotating rod with the central axis of the first rotating rod as the axis of rotation. Multiple striking rods are arranged circumferentially on the inner wall surface of the housing with the central axis of the first rotating rod as the axis of rotation, and there is a gap between adjacent striking rods; A heater is provided on the inner wall surface of the housing, and there is one heater between every two adjacent striking bars; The discharge pipe has one end connected to the discharge port of the box body and the other end connected to the discharge port of the electrolytic cell; The first air pump is located between the discharge pipe and the discharge port of the electrolytic cell and is used to transport powder. Each of the stirring rods is located between two adjacent striking rods.
2. A pretreatment device for an aluminium electrolysis cell according to claim 1, characterised in that The discharge pipe is set at an angle to the central axis of the electrolytic cell discharge port.
3. A pretreatment device for an aluminium electrolysis cell according to claim 2, characterised in that The extended line of the central axis of the discharge pipe does not intersect with the central axis of the discharge port of the electrolytic cell.
4. A pretreatment device for an aluminium electrolysis cell according to claim 3, characterised in that A transition pipe is provided between the discharge port of the box and the discharge pipe. The discharge pipe is connected to the side wall of the transition pipe. One end of the transition pipe is open and connected to the discharge port of the box, and the other end of the transition pipe is closed. A second motor is provided at one end of the transition pipe. A second rotating rod is provided at the output end of the second motor. The outer wall of the second rotating rod is provided with spiral blades in the circumferential direction.
5. The pretreatment apparatus for aluminum electrolytic cells according to claim 1, characterized in that, The bottom of the box is sloped.
6. A pretreatment device for an aluminum electrolytic cell according to claim 1, characterized in that, The central axis of the stirring rod near the bottom of the first rotating rod is inclined to the central axis of the first rotating rod.
7. A pretreatment device for an aluminum electrolytic cell as defined in claim 1, characterized in that, A sleeve is fitted on the outer wall of the discharge pipe. A placement cavity is opened inside the side wall of the sleeve. A heating wire is installed inside the placement cavity. A power source for heating the heating wire is provided on the outer wall of the sleeve.
8. A pretreatment device for an aluminum electrolytic cell as defined in claim 4, characterized in that, A first air inlet is provided on the side wall of the discharge pipe, a second air inlet is provided on the side wall of the transition pipe, a nitrogen gas source box is provided on the outer wall of the transition pipe, an exhaust pipe is provided between the nitrogen gas source box and the first air inlet and the second air inlet, and a second air pump is provided on each exhaust pipe.