A connection device for reducing black voltage in an aluminium electrolysis process
By connecting a bridging busbar between the crossbeam busbar and the column busbar of the electrolytic cell in the off-state state to form a parallel structure, the problem of high black voltage during aluminum electrolysis is solved, resulting in significant energy savings and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN YUNLV HAIXIN ALUMINUM CO LTD
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-21
AI Technical Summary
In existing aluminum electrolysis processes, the black voltage of the electrolytic cell is high when the cell is shut down, resulting in additional energy loss and increased production costs. Traditional methods to reduce this are not very effective and require a large amount of manpower.
By connecting a bridging busbar between the crossbeam busbar and the column busbar of the electrolytic cell in the off-state state, a parallel structure is formed, which reduces the total resistance of the busbars and the contact resistance.
It effectively reduces the black voltage of each electrolytic cell in a shutdown state by 79.3mV, saving an average of 319 yuan per day, improving economic efficiency and reducing production costs.
Smart Images
Figure CN224531068U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrolysis equipment, and specifically discloses a connection device for reducing black voltage in the aluminum electrolysis process. Background Technology
[0002] Black voltage refers to the unutilized portion of the voltage in an electrolytic cell when it is not in operation during electrolysis. It primarily originates from contact resistance at points such as the busbar crimping points and the anode rod contact surfaces. Black voltage leads to additional energy loss, affecting energy efficiency and increasing production costs.
[0003] With the development of the times and technology, aluminum electrolysis has been widely used. However, current aluminum electrolysis is generally limited by electricity, facing a large number of electrolytic cells in shutdown state, resulting in high black voltage and large energy consumption in the shutdown state. Due to the characteristics of the shutdown electrolytic cells, such as long busbar span, many welding points, easy dust accumulation at the short-circuit crimping interface, insufficient flatness of the contact surface, and insufficient crimping, traditional methods for reducing black voltage in the shutdown state, such as tapping the short-circuit interface while reinforcing the column bolts, or using high-pressure air to blow the short-circuit interface to reduce the voltage drop at the short-circuit interface of the column busbar, require a large amount of manpower and have little effect on reducing black voltage.
[0004] With a series current of 400KA, the black voltage of most electrolytic cells in the shutdown state is around 270MV, and the black voltage of some electrolytic cells in the shutdown state is around 310MV, with an average black voltage of around 285MV. However, traditional black voltage reduction methods can only reduce the black voltage of each electrolytic cell in the shutdown state by an average of less than 10mV, which is far from meeting the black voltage reduction requirements of existing electrolytic cells in the shutdown state. Utility Model Content
[0005] The purpose of this invention is to provide a connection device for reducing black voltage in the aluminum electrolysis process, thereby solving the problems of poor black voltage reduction effect and high cost in the aluminum electrolysis process.
[0006] The specific solution of this utility model is as follows: A connection device for reducing black voltage in an aluminum electrolysis process includes a first operating electrolytic cell, a first stopped electrolytic cell, and a first bridging busbar. The first operating electrolytic cell includes a first crossbeam busbar and a first column busbar. The first stopped electrolytic cell includes a second crossbeam busbar and a second column busbar. The first column busbar of the first operating electrolytic cell is connected to the second crossbeam busbar of the first stopped electrolytic cell through the first bridging busbar.
[0007] In some embodiments, the system further includes N-1 electrolytic cells in a stopped state and N-1 bridging busbars. The Nth stopped electrolytic cell includes the N+1th crossbeam busbar and the N+1th column busbar. The Nth column busbar of the N-1th stopped electrolytic cell is connected to the N+1th crossbeam busbar of the Nth stopped electrolytic cell through the Nth bridging busbar, and so on, in a cycle, where N=2, ..., n.
[0008] In some embodiments, the first operating state electrolytic cell includes a first crossbeam busbar and multiple first column busbars; the (N-1)th stopped state electrolytic cell includes an Nth crossbeam busbar and multiple Nth column busbars; the Nth stopped state electrolytic cell includes an N+1th crossbeam busbar and multiple N+1th column busbars; any one of the first column busbars of the first operating state electrolytic cell is connected to the Nth crossbeam busbar of the (N-1)th stopped state electrolytic cell via a first bridging busbar; any one of the Nth column busbars of the (N-1)th stopped state electrolytic cell is connected to the N+1th crossbeam busbar of the Nth stopped state electrolytic cell via an Nth bridging busbar.
[0009] In some embodiments, multiple first column busbars of the first operating state electrolytic cell are sequentially arranged between the aluminum outlet end and the flue end, and multiple Nth column busbars of the N-1th stopped state electrolytic cell are sequentially arranged between the aluminum outlet end and the flue end. The first column busbar of the first operating state electrolytic cell near the flue end is connected to the Nth crossbeam busbar of the N-1th stopped state electrolytic cell through a first bridging busbar, and the Nth column busbar of the N-1th stopped state electrolytic cell near the flue end is connected to the N+1th crossbeam busbar of the Nth stopped state electrolytic cell through the Nth bridging busbar.
[0010] In some embodiments, the multiple first column busbars of the first operating state electrolytic cell are respectively connected to the Nth crossbeam busbar of the N-1th stopped state electrolytic cell through multiple first bridging busbars, and the multiple Nth column busbars of the N-1th stopped state electrolytic cell are respectively connected to the N+1th crossbeam busbar of the Nth stopped state electrolytic cell through multiple Nth bridging busbars.
[0011] In some embodiments, each jumper busbar is 247 cm long, 16 cm wide, and 12.5 cm high.
[0012] In some embodiments, each crossbeam busbar has a length of 16.5 cm, a width of 6 cm, and a height of 55 cm.
[0013] In some embodiments, each column busbar is 18.5 cm long, 6 cm wide, and 55 cm high.
[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects: 1. Connecting the crossbeam busbar of the electrolytic cell in the off-state state to the column busbar of the electrolytic cell via a bridging busbar is equivalent to adding one or more conductors in parallel to the original winding busbar, thereby reducing the total resistance of the busbar. This can effectively reduce black voltage, lower costs, and improve economic efficiency. It can reduce the black voltage of each off-state electrolytic cell by 79.3mV, and save an average of 319 yuan per day per off-state electrolytic cell.
[0015] 2. From an economic perspective, each electrolytic cell in a shutdown state should be equipped with only one bridging busbar. Connecting the bridging busbar to the column busbar near the flue end is the optimal connection method. This not only effectively reduces black voltage but also lowers production costs and improves economic efficiency. Attached Figure Description
[0016] Figure 1 This is a busbar diagram of the electrolytic cell in Embodiment 1 of this utility model.
[0017] Figure 2 This is a schematic diagram of the busbar of the electrolytic cell in Embodiment 1 of this utility model.
[0018] Figure 3 This is a schematic diagram illustrating the principle of reducing the total resistance of the busbar of an electrolytic cell in a shutdown state in Embodiment 1 of this utility model.
[0019] Figure 4 This is a schematic diagram illustrating the principle of reducing the total resistance of the busbar of multiple electrolytic cells in a shutdown state in Embodiment 1 of this utility model.
[0020] Figure 5 This is a diagram showing the configuration of multiple column busbars in a single electrolytic cell in Embodiment 1 of this utility model.
[0021] Reference numerals: 1-Electrolytic cell in first operating state, 101-First crossbeam busbar, 102-First column busbar, 11-Electrolytic cell in second operating state, 12-Electrolytic cell in third operating state, 13-Electrolytic cell in fourth operating state, 14-Electrolytic cell in fifth operating state, 2-Electrolytic cell in first stopped state, 201-Second crossbeam busbar, 202-Second column busbar, 21-Electrolytic cell in second stopped state, 211-Third crossbeam busbar, 212-Third column busbar, 22-Electrolytic cell in third stopped state, 221-Fourth crossbeam busbar, 222-Fourth column busbar, 3-First bridging busbar, 31-Second bridging busbar, 32-Third bridging busbar, 4-Power inlet end, 5-Aluminum outlet end, 6-Flue end, 7-Cell centerline, 8-Column busbar. Detailed Implementation
[0022] The specific implementation method is described below with reference to the accompanying drawings.
[0023] Example 1 A connection device for reducing black voltage in an aluminum electrolysis process includes a first operating electrolytic cell 1, a first stopped electrolytic cell 2, and a first bridging busbar 3. The first operating electrolytic cell 1 includes a first crossbeam busbar 101 and a first column busbar 102. The first stopped electrolytic cell 2 includes a second crossbeam busbar 201 and a second column busbar 202. The first column busbar of the first operating electrolytic cell is connected to the second crossbeam busbar of the first stopped electrolytic cell through the first bridging busbar 3.
[0024] Connecting the crossbeam busbar of the electrolytic cell in the off-state state to the column busbar of the electrolytic cell via a bridging busbar is equivalent to adding one or more conductors in parallel to the original winding busbar, thereby reducing the total resistance of the busbar. This can effectively reduce black voltage, lower costs, and improve economic efficiency. It can reduce black voltage by 79.3mV per off-state electrolytic cell, and save an average of 319 yuan per cell per day.
[0025] Among them, such as Figure 1 As shown, the electrolytic cell includes a first operating state electrolytic cell 1 and a second operating state electrolytic cell 11. The busbar design of the electrolytic cell includes: multiple column busbars are provided on the A side of the first operating state electrolytic cell, and multiple column busbars are provided on the A side of the second operating state electrolytic cell. The multiple column busbars on the A side of the first operating state electrolytic cell converge from the square steel head outlet end to the multiple column busbars on the A side of the second operating state electrolytic cell.
[0026] like Figure 2 As shown, the electrolytic cell includes a first operating state electrolytic cell 1, a second operating state electrolytic cell 11, a third operating state electrolytic cell 12, a fourth operating state electrolytic cell 13 and a fifth operating state electrolytic cell 14 connected from left to right. The fifth operating state electrolytic cell 14 is connected to the power input terminal 4.
[0027] In some embodiments, the system further includes N-1 electrolytic cells in a stopped state and N-1 bridging busbars. The Nth stopped electrolytic cell includes the N+1th crossbeam busbar and the N+1th column busbar. The Nth column busbar of the N-1th stopped electrolytic cell is connected to the N+1th crossbeam busbar of the Nth stopped electrolytic cell through the Nth bridging busbar, and so on, in a cycle, where N=2, ..., n.
[0028] In some embodiments, the first operating state electrolytic cell 1 includes a first crossbeam busbar 101 and multiple first column busbars 102; the (N-1)th stopped state electrolytic cell includes an Nth crossbeam busbar and multiple Nth column busbars; the Nth stopped state electrolytic cell includes an N+1th crossbeam busbar and multiple N+1th column busbars; any one of the first column busbars of the first operating state electrolytic cell is connected to the Nth crossbeam busbar of the (N-1)th stopped state electrolytic cell via a first bridging busbar 3; any one of the Nth column busbars of the (N-1)th stopped state electrolytic cell is connected to the N+1th crossbeam busbar of the Nth stopped state electrolytic cell via an Nth bridging busbar.
[0029] In some embodiments, multiple first column busbars of the first operating state electrolytic cell are sequentially arranged between the aluminum outlet end 5 and the flue end 6, and multiple Nth column busbars of the N-1th stopped state electrolytic cell are sequentially arranged between the aluminum outlet end 5 and the flue end 6. The first column busbar of the first operating state electrolytic cell near the flue end is connected to the Nth crossbeam busbar of the N-1th stopped state electrolytic cell through the first bridging busbar 3, and the Nth column busbar of the N-1th stopped state electrolytic cell near the flue end is connected to the N+1th crossbeam busbar of the Nth stopped state electrolytic cell through the Nth bridging busbar.
[0030] Among them, the design of multiple column busbars for a single electrolytic cell, such as Figure 5 As shown, a single electrolytic cell includes 6 column busbars. The distance from the cell centerline 7 to the flue end 6 is 12300mm, and the distance from the cell centerline 7 to the aluminum outlet end 5 is 17700mm. The column busbar closer to the aluminum outlet end is named column busbar 1, and the column busbar closer to the flue end is named column busbar 6. That is, the column busbars from the aluminum outlet end 5 to the flue end 6 are named column busbar 1, column busbar 2, column busbar 3, column busbar 4, column busbar 5, and column busbar 6 respectively. Figure 5 As can be seen from the data, the distances from the center line 7 of the channel to each column busbar, from closest to farthest, are: distance from center line 7 to column busbar 6, distance from center line 7 to column busbar 5, distance from center line 7 to column busbar 1, distance from center line 7 to column busbar 4, distance from center line 7 to column busbar 2, and distance from center line 7 to column busbar 3. Comparing the total busbar length of column busbar 1 (closest to the aluminum outlet end) with the total busbar length of column busbar 6 (closest to the flue end), we can see that the length of column busbar 6 around the channel is less than that of column busbar 1. Therefore, considering the busbar length, installing the bridging busbar on column busbar 6, that is, connecting the bridging busbar to the column busbar near the flue end 6, can reduce the busbar length, thereby reducing the busbar resistance, reducing black voltage, lowering costs, and improving economic efficiency.
[0031] To verify that connecting the jumper busbar to the column busbar near the flue end achieves the optimal blackening voltage reduction effect with only one jumper busbar, the jumper busbar installed on column busbar 6 was removed and then installed sequentially on column busbars 1, 2, 3, 4, and 5. The blackening voltage reduction effect of the jumper busbar installed on column busbars 1, 2, 3, 4, and 5 was verified respectively. The verification result was: blackening voltage reduction... The voltage reduction effect, from highest to lowest, is as follows: installing the bridging busbar on busbar #6, installing the bridging busbar on busbar #5, installing the bridging busbar on busbar #1, installing the bridging busbar on busbar #4, installing the bridging busbar on busbar #2, and installing the bridging busbar on busbar #3. It can be seen that installing the bridging busbar on busbar #6 has the best blackening voltage reduction effect. That is, when only one bridging busbar is installed, connecting the bridging busbar to the busbar closest to the flue end has the best blackening voltage reduction effect.
[0032] Therefore, from an economic perspective, it is optimal to install only one bridging busbar on each electrolytic cell in a shutdown state and connect the bridging busbar to the column busbar near the flue end. This not only effectively reduces black voltage but also lowers production costs and improves economic efficiency.
[0033] For example, such as Figure 3 As shown, the electrolytic cell includes a fourth operating state electrolytic cell 13, a third operating state electrolytic cell 12, a second operating state electrolytic cell 11, a first operating state electrolytic cell 1, and a first stopped state electrolytic cell 2 connected from left to right. The first stopped state electrolytic cell 2 is connected to the power inlet 4. The first column busbar of the first operating state electrolytic cell near the flue end is connected to the second crossbeam busbar of the first stopped state electrolytic cell through the first bridging busbar 3.
[0034] Or, such as Figure 4As shown, the electrolytic cell includes, from left to right, a second operating electrolytic cell 11, a first operating electrolytic cell 1, a first stopped electrolytic cell 2, a second stopped electrolytic cell 21, and a third stopped electrolytic cell 22, as well as a second bridging busbar 31 and a third bridging busbar 32. The second stopped electrolytic cell 21 includes a third crossbeam busbar 211 and multiple third column busbars 212. The third stopped electrolytic cell 22 includes a fourth crossbeam busbar 221 and multiple fourth column busbars 222. In the stopped state, the electrolytic cell 22 is connected to the power supply disconnect 4. The first column busbar of the first operating state electrolytic cell near the flue end is connected to the second crossbeam busbar of the first stopped state electrolytic cell through the first bridging busbar 3. The second column busbar of the first stopped state electrolytic cell near the flue end is connected to the third crossbeam busbar of the second stopped state electrolytic cell through the second bridging busbar 31. The third column busbar of the second stopped state electrolytic cell near the flue end is connected to the fourth crossbeam busbar of the third stopped state electrolytic cell through the third bridging busbar 32.
[0035] In some embodiments, the multiple first column busbars of the first operating state electrolytic cell are respectively connected to the Nth crossbeam busbar of the N-1th stopped state electrolytic cell through multiple first bridging busbars 3, and the multiple Nth column busbars of the N-1th stopped state electrolytic cell are respectively connected to the N+1th crossbeam busbar of the Nth stopped state electrolytic cell through multiple Nth bridging busbars.
[0036] In some embodiments, each jumper busbar is 247 cm long, 16 cm wide, and 12.5 cm high.
[0037] During anode replacement, the lifting height of a single anode by the overhead crane is limited. Installing the bridging busbar too high would severely hinder or prevent the replacement operation altogether. Therefore, the shape and installation position of the bridging busbar need to be adjusted downwards. Setting the length of the bridging busbar to 247cm, the width to 16cm, and the height to 12.5cm not only meets the connection requirements between the bridging busbar and the column busbar but also does not interfere with the anode replacement operation.
[0038] In some embodiments, each crossbeam busbar has a length of 16.5 cm, a width of 6 cm, and a height of 55 cm.
[0039] In some embodiments, each column busbar is 18.5 cm long, 6 cm wide, and 55 cm high.
Claims
1. A connection device for reducing black voltage in the aluminum electrolysis process, characterized in that: The electrolytic cell includes a first operating state electrolytic cell, a first stopped state electrolytic cell, and a first bridging busbar. The first operating state electrolytic cell includes a first crossbeam busbar and a first column busbar. The first stopped state electrolytic cell includes a second crossbeam busbar and a second column busbar. The first column busbar of the first operating state electrolytic cell is connected to the second crossbeam busbar of the first stopped state electrolytic cell through the first bridging busbar.
2. The connection device for reducing black voltage in the aluminum electrolysis process according to claim 1, characterized in that: It also includes N-1 electrolytic cells in a stopped state and N-1 bridging busbars. The Nth stopped electrolytic cell includes the N+1th crossbeam busbar and the N+1th column busbar. The Nth column busbar of the N-1th stopped electrolytic cell is connected to the N+1th crossbeam busbar of the Nth stopped electrolytic cell through the Nth bridging busbar, and so on, where N=2, ..., n.
3. The connection device for reducing black voltage in the aluminum electrolysis process according to claim 2, characterized in that: The first operating electrolytic cell includes a first crossbeam busbar and multiple first column busbars. The (N-1)th stopped electrolytic cell includes an Nth crossbeam busbar and multiple Nth column busbars. The Nth stopped electrolytic cell includes an (N+1)th crossbeam busbar and multiple (N+1)th column busbars. Any one of the first column busbars of the first operating electrolytic cell is connected to the Nth crossbeam busbar of the (N-1)th stopped electrolytic cell via a first bridging busbar. Any one of the Nth column busbars of the (N-1)th stopped electrolytic cell is connected to the (N+1)th crossbeam busbar of the Nth stopped electrolytic cell via an Nth bridging busbar.
4. The connection device for reducing black voltage in the aluminum electrolysis process according to claim 3, characterized in that: In the first operating state electrolytic cell, multiple first column busbars are sequentially arranged between the aluminum outlet end and the flue end. In the N-1th stopped state electrolytic cell, multiple Nth column busbars are sequentially arranged between the aluminum outlet end and the flue end. The first column busbar of the first operating state electrolytic cell near the flue end is connected to the Nth crossbeam busbar of the N-1th stopped state electrolytic cell through a first bridging busbar. The Nth column busbar of the N-1th stopped state electrolytic cell near the flue end is connected to the N+1th crossbeam busbar of the Nth stopped state electrolytic cell through the Nth bridging busbar.
5. A connection device for reducing black voltage in the aluminum electrolysis process according to claim 3, characterized in that: The multiple first column busbars of the first operating state electrolytic cell are respectively connected to the Nth crossbeam busbar of the N-1th stopped state electrolytic cell through multiple first bridging busbars. The multiple Nth column busbars of the N-1th stopped state electrolytic cell are respectively connected to the N+1th crossbeam busbar of the Nth stopped state electrolytic cell through multiple Nth bridging busbars.
6. A connection device for reducing black voltage in the aluminum electrolysis process according to claim 1 or 2, characterized in that: Each jumper busbar is 247cm long, 16cm wide, and 12.5cm high.
7. A connection device for reducing black voltage in the aluminum electrolysis process according to claim 3, characterized in that: Each crossbeam has a length of 16.5cm, a width of 6cm, and a height of 55cm.
8. A connection device for reducing black voltage in the aluminum electrolysis process according to claim 3, characterized in that: Each column busbar is 18.5cm long, 6cm wide, and 55cm high.