CA2785868C - Cell bottom structure of reduction cell - Google Patents
Cell bottom structure of reduction cell Download PDFInfo
- Publication number
- CA2785868C CA2785868C CA2785868A CA2785868A CA2785868C CA 2785868 C CA2785868 C CA 2785868C CA 2785868 A CA2785868 A CA 2785868A CA 2785868 A CA2785868 A CA 2785868A CA 2785868 C CA2785868 C CA 2785868C
- Authority
- CA
- Canada
- Prior art keywords
- cell
- column
- carbon blocks
- reduction cell
- reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 49
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 21
- 230000005611 electricity Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
Abstract
The present invention discloses a cell bottom structure of a reduction cell which comprises a reduction cell (1) and a cathode bus (2), wherein the bottom of the reduction cell (1) is provided with column-shaped cathode carbon blocks (3) perpendicular to the bottom of the reduction cell (1), and a lower end of the column-shaped cathode carbon block (3) is connected to the cathode bus (2). By means of inserting the column-shaped cathode carbon blocks perpendicular to the bottom of the reduction cell and connecting the lower end of the column-shaped cathode carbon block with the cathode bus, such that electrical current that guided from anode carbon blocks is guided through the molten aluminum to the column-shaped cathode carbon blocks and is downwardly guided out, the present invention reduces horizontal electrical current in the molten aluminum, such that the cathode extending into the molten aluminum can effectively reduce fluctuations of the molten aluminum to obtain a stable surface of the molten aluminum, thereby reducing a polar distance between a cathode and an anode and lowering cell voltage so as to achieve the object of lowering electricity consumption.
Description
Cell bottom Structure of Reduction Cell Field of the Invention The present invention relates to a cell bottom structure of a reduction cell, pertaining to the technical field of aluminum reduction cell.
Background of the Invention In the production of a prebaked reduction cell, most of the aluminum reduction cells select a planar cell bottom with cathode carbon blocks placed horizontally, into which an electric current enters from an upper anode and guided out of a lateral portion of the cell to form a turn of 900, thereby forming a relatively large horizontal electric current at a layer of molten aluminum. The horizontal electric current tends to cause the molten aluminum to form an eddy flow under the action of magnetic field to generate a relatively large wave crest, such that on one hand, it influences the stable operation of the reduction cell, and on the other hand, in order to prevent a short circuit due to a wave crest of the molten aluminum scours to a anode, a polar distance of the cathode and the anode must be increased, resulting a rise in cell voltage and an increase in electricity consumption. At the same time, the cathode carbon blocks are placed horizontally, this. results in a complicated structure of a cell housing of .the reduction cell since thermal expansion and sodium absorption expansion render complicated force conditions for the cell housing and its periphery. In addition, failure of introducing electricity and aggregation of lateral output electric current towards cell edges impact the safety of cell ledges of the reduction cell, resulting a large amount of steel used for the cell ledges.
Summary of the Invention The technical problem to be solved by the present invention, in some embodiments, is to provide a cell bottom structure of a reduction cell, which can reduce , .73140-34 horizontal electrical current in a layer of molten aluminum, eliminate stresses on a cell housing generated due to cathode expansion, simply the structure of the cell housing, reducing polar distance of the reduction cell and cell voltage, alleviate a construction cost of the cell housing and overcome shortages in the prior art.
According to one aspect of the present invention, there is provided a cell bottom structure of a reduction cell comprising a reduction cell and a cathode bus, wherein the bottom of the reduction cell is provided with column-shaped cathode carbon blocks perpendicular to the bottom of the reduction cell, and a lower end of the column-shaped cathode carbon block is connected to the cathode bus.
In some embodiments, the column-shaped cathode carbon blocks are located below anode carbon blocks.
In some embodiments, there is/are 1-4 column-shaped cathode carbon blocks provided below each anode carbon block.
In some embodiments, the column-shaped cathode carbon blocks extend a length of 5-200mm into molten aluminum of the reduction cell.
In some embodiments, the column-shaped cathode carbon blocks are connected with the cathode bus through bolts.
In some embodiments, the column-shaped cathode carbon blocks have a shape of quadrangular prism or quadrangular prism with steps.
By comparison with the prior art, by means of inserting the column-shaped cathode carbon blocks perpendicular to the bottom of the reduction cell and connecting the lower end of the column-shaped cathode carbon block with the cathode bus, such that electrical current that guided from anode carbon blocks is
Background of the Invention In the production of a prebaked reduction cell, most of the aluminum reduction cells select a planar cell bottom with cathode carbon blocks placed horizontally, into which an electric current enters from an upper anode and guided out of a lateral portion of the cell to form a turn of 900, thereby forming a relatively large horizontal electric current at a layer of molten aluminum. The horizontal electric current tends to cause the molten aluminum to form an eddy flow under the action of magnetic field to generate a relatively large wave crest, such that on one hand, it influences the stable operation of the reduction cell, and on the other hand, in order to prevent a short circuit due to a wave crest of the molten aluminum scours to a anode, a polar distance of the cathode and the anode must be increased, resulting a rise in cell voltage and an increase in electricity consumption. At the same time, the cathode carbon blocks are placed horizontally, this. results in a complicated structure of a cell housing of .the reduction cell since thermal expansion and sodium absorption expansion render complicated force conditions for the cell housing and its periphery. In addition, failure of introducing electricity and aggregation of lateral output electric current towards cell edges impact the safety of cell ledges of the reduction cell, resulting a large amount of steel used for the cell ledges.
Summary of the Invention The technical problem to be solved by the present invention, in some embodiments, is to provide a cell bottom structure of a reduction cell, which can reduce , .73140-34 horizontal electrical current in a layer of molten aluminum, eliminate stresses on a cell housing generated due to cathode expansion, simply the structure of the cell housing, reducing polar distance of the reduction cell and cell voltage, alleviate a construction cost of the cell housing and overcome shortages in the prior art.
According to one aspect of the present invention, there is provided a cell bottom structure of a reduction cell comprising a reduction cell and a cathode bus, wherein the bottom of the reduction cell is provided with column-shaped cathode carbon blocks perpendicular to the bottom of the reduction cell, and a lower end of the column-shaped cathode carbon block is connected to the cathode bus.
In some embodiments, the column-shaped cathode carbon blocks are located below anode carbon blocks.
In some embodiments, there is/are 1-4 column-shaped cathode carbon blocks provided below each anode carbon block.
In some embodiments, the column-shaped cathode carbon blocks extend a length of 5-200mm into molten aluminum of the reduction cell.
In some embodiments, the column-shaped cathode carbon blocks are connected with the cathode bus through bolts.
In some embodiments, the column-shaped cathode carbon blocks have a shape of quadrangular prism or quadrangular prism with steps.
By comparison with the prior art, by means of inserting the column-shaped cathode carbon blocks perpendicular to the bottom of the reduction cell and connecting the lower end of the column-shaped cathode carbon block with the cathode bus, such that electrical current that guided from anode carbon blocks is
- 2 -guided through the molten aluminum to the column-shaped cathode carbon blocks and is downwardly guided out, the present invention in some embodiments may reduce horizontal electrical current in the molten aluminum, such that the cathode extending into the molten aluminum can effectively reduce fluctuations of the molten aluminum to obtain a stable surface of the molten aluminum, thereby reducing a polar distance of a cathode and an anode and lowering cell voltage so as to achieve the object of lowering electricity consumption. According to a number of tests by the applicant, a cathode/anode polar distance can reduce 100-250mm, a voltage drop of the cathode can reduce 100-200mv, a cell voltage can reduce 400-850mv, and an effect of saving 1200-2500kwh/t-Al may be achieved. In some embodiments, the column-shaped cathode carbon blocks have a shape of quadrangular prism or quadrangular prism with steps, and segment-splicing arrangement and cell bottom placement thereof eliminate stresses exerted on the cell housing by the thermal expansion and sodium absorption expansion, enabling a simplification of the cell housing design and the material used.
According to the statistics of the test examination, the steel amount used for the cell bottom can be saved 70%, the lifespan of the cell can increase 500 days, allowing the impact of electrolyte deposition on the cell bottom electric conduction to be minimized. In some embodiments, the column-shaped cathode carbon blocks are located below the anode carbon blocks, so as to facilitate the electric current to be vertically guided from the anode carbon blocks. In some embodiments, there is/are 1-4 column-shaped cathode carbon blocks provided below each of the anode carbon blocks, and the column-shaped cathode carbon blocks extend a length of 5-200mm into the molten aluminum of the reduction cell, wherein the specific number and positions thereof are determined in accordance with the reduction cell capacity and the anode dimension. In some embodiments, the column-shaped cathode carbon blocks are interconnected with
According to the statistics of the test examination, the steel amount used for the cell bottom can be saved 70%, the lifespan of the cell can increase 500 days, allowing the impact of electrolyte deposition on the cell bottom electric conduction to be minimized. In some embodiments, the column-shaped cathode carbon blocks are located below the anode carbon blocks, so as to facilitate the electric current to be vertically guided from the anode carbon blocks. In some embodiments, there is/are 1-4 column-shaped cathode carbon blocks provided below each of the anode carbon blocks, and the column-shaped cathode carbon blocks extend a length of 5-200mm into the molten aluminum of the reduction cell, wherein the specific number and positions thereof are determined in accordance with the reduction cell capacity and the anode dimension. In some embodiments, the column-shaped cathode carbon blocks are interconnected with
- 3 -' 73140-34 the cathode bus through bolts, wherein the cross-sectional dimension of the bus and the number of the bolts are determined in accordance with the magnitude of current. Some embodiments of the present invention can also effectively inhibit eddy flow of molten aluminum, simplify the cell housing structure, decrease initial construction investment, improve current distribution, extend lifespan of the reduction cell, and has a very good popularizing value.
Brief Description of the Drawings Fig.1 is a schematic view of the configuration of the present invention;
- 3a -Fig.2 is an A-A view of Fig.l.
Detailed Description of the Invention Embodiment 1: as shown in Figs. 1 and 2, in a design of a reduction cell, cathodes are made as column-shaped cathode carbon blocks 3 which have a shape of quadrangular prism or quadrangular prism with steps. The column-shaped cathode carbon blocks 3 are placed perpendicular to a cell bottom of the reduction cell 1 when placing the column-shaped cathode carbon blocks 3. Upper ends of the perpendicularly placed column-shaped cathode carbon blocks 3 extend a length of 5,--200mm into molten aluminum in the reduction cell I and lower ends of the column-shaped cathode carbon blocks 3 are connected with a cathode bus 2 through bolts.
When placing and mounting the column-shaped cathode carbon blocks 3 perpendicular to the cell bottom of the reduction cell, the column-shaped cathode carbon blocks 3 are mounted below anode carbon blocks 4. There is/are 1-4 column-shaped cathode carbon blocks 3 provided below each anode carbon block 4, wherein the specific number and positions thereof are determined in accordance with the reduction cell capacity and the anode dimension. Besides, the reduction cell I arranged according to the present invention can eliminate the cathode steel rod and steel cell housing in the cathode carbon blocks. The reduction cell employs heat insulation materials and corrosion resistant materials to design a lava pool, thus it is only necessary to consider self expansion of the materials during the manufacture, enabling the structure of the reduction cell to be simplified to a great extent. The design of the reduction cell is based on a low cell voltage, thereby decreasing the amount of heat dissipation.
According to a test examination, the reduction cell produced in accordance with the present invention can save 10%-20% of energy compared to conventional reduction cells.
Brief Description of the Drawings Fig.1 is a schematic view of the configuration of the present invention;
- 3a -Fig.2 is an A-A view of Fig.l.
Detailed Description of the Invention Embodiment 1: as shown in Figs. 1 and 2, in a design of a reduction cell, cathodes are made as column-shaped cathode carbon blocks 3 which have a shape of quadrangular prism or quadrangular prism with steps. The column-shaped cathode carbon blocks 3 are placed perpendicular to a cell bottom of the reduction cell 1 when placing the column-shaped cathode carbon blocks 3. Upper ends of the perpendicularly placed column-shaped cathode carbon blocks 3 extend a length of 5,--200mm into molten aluminum in the reduction cell I and lower ends of the column-shaped cathode carbon blocks 3 are connected with a cathode bus 2 through bolts.
When placing and mounting the column-shaped cathode carbon blocks 3 perpendicular to the cell bottom of the reduction cell, the column-shaped cathode carbon blocks 3 are mounted below anode carbon blocks 4. There is/are 1-4 column-shaped cathode carbon blocks 3 provided below each anode carbon block 4, wherein the specific number and positions thereof are determined in accordance with the reduction cell capacity and the anode dimension. Besides, the reduction cell I arranged according to the present invention can eliminate the cathode steel rod and steel cell housing in the cathode carbon blocks. The reduction cell employs heat insulation materials and corrosion resistant materials to design a lava pool, thus it is only necessary to consider self expansion of the materials during the manufacture, enabling the structure of the reduction cell to be simplified to a great extent. The design of the reduction cell is based on a low cell voltage, thereby decreasing the amount of heat dissipation.
According to a test examination, the reduction cell produced in accordance with the present invention can save 10%-20% of energy compared to conventional reduction cells.
- 4
Claims (6)
1. A cell bottom structure of a reduction cell comprising a reduction cell and a cathode bus, wherein the bottom of the reduction cell is provided with column-shaped cathode carbon blocks perpendicular to the bottom of the reduction cell, and a lower end of the column-shaped cathode carbon block is connected to the cathode bus.
2. The cell bottom structure of a reduction cell according to claim 1, wherein the column-shaped cathode carbon blocks are located below anode carbon blocks.
3. The cell bottom structure of a reduction cell according to claim 2, wherein there is/are 1-4 column-shaped cathode carbon blocks provided below each anode carbon block.
4. The cell bottom structure of a reduction cell according to claim 1, wherein the column-shaped cathode carbon blocks extend a length of 5-200mm into molten aluminum of the reduction cell.
5. The cell bottom structure of a reduction cell according to claim 1, wherein the column-shaped cathode carbon blocks are connected with the cathode bus through bolts.
6. The cell bottom structure of a reduction cell according to claim 1, wherein the column-shaped cathode carbon blocks have a shape of quadrangular prism or quadrangular prism with steps.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010300091.2 | 2010-01-07 | ||
| CN2010103000912A CN102121118A (en) | 2010-01-07 | 2010-01-07 | Cell bottom structure of electrolytic cell |
| PCT/CN2011/000027 WO2011082657A1 (en) | 2010-01-07 | 2011-01-06 | Bottom structure of electrolytic cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2785868A1 CA2785868A1 (en) | 2011-07-14 |
| CA2785868C true CA2785868C (en) | 2015-04-14 |
Family
ID=44249779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2785868A Active CA2785868C (en) | 2010-01-07 | 2011-01-06 | Cell bottom structure of reduction cell |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20130186749A1 (en) |
| CN (1) | CN102121118A (en) |
| AU (1) | AU2011204683B2 (en) |
| CA (1) | CA2785868C (en) |
| MY (1) | MY159932A (en) |
| WO (1) | WO2011082657A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400175A (en) * | 2011-10-08 | 2012-04-04 | 高伟 | Conducting structure of cathode of aluminum electrolytic cell |
| US10246790B2 (en) * | 2012-12-21 | 2019-04-02 | United Company RUSAL Engineering and Technology Centre LLC | Aluminum electrolysis cell cathode shunt design |
| CN105648474B (en) * | 2016-03-10 | 2017-09-01 | 河南中孚实业股份有限公司 | Large-scale pre-baked cell current stabilization saving construction method |
| CN111153395B (en) * | 2020-01-16 | 2022-08-26 | 眉山顺应循环再生资源有限公司 | Method for comprehensively recovering fluorine and carbon powder in electrolytic aluminum cathode carbon block |
| CN113445079B (en) * | 2021-06-17 | 2023-09-22 | 合肥工业大学 | Cathode steel bar structure capable of reducing horizontal current of aluminum liquid for aluminum electrolysis cell |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4071420A (en) * | 1975-12-31 | 1978-01-31 | Aluminum Company Of America | Electrolytic production of metal |
| US4405433A (en) * | 1981-04-06 | 1983-09-20 | Kaiser Aluminum & Chemical Corporation | Aluminum reduction cell electrode |
| DE69509540T2 (en) * | 1994-09-08 | 1999-09-30 | Moltech Invent Sa | ALUMINUM ELECTRIC PRODUCTION CELL WITH IMPROVED CARBON CATHODE BLOCKS |
| CN200964442Y (en) * | 2006-06-30 | 2007-10-24 | 东北大学设计研究院（有限公司） | Aluminum cell bus collocation structure |
| CN100478500C (en) * | 2007-03-02 | 2009-04-15 | 冯乃祥 | Abnormal cathode carbon block structure aluminum electrolysis bath |
| CN201367472Y (en) * | 2009-03-05 | 2009-12-23 | 沈阳铝镁设计研究院 | Cathode structure of aluminium electrolysis bath of bath bottom tapping |
| CN201367471Y (en) * | 2009-03-05 | 2009-12-23 | 沈阳铝镁设计研究院 | Cathode carbon block structure |
-
2010
- 2010-01-07 CN CN2010103000912A patent/CN102121118A/en active Pending
-
2011
- 2011-01-06 US US13/520,894 patent/US20130186749A1/en not_active Abandoned
- 2011-01-06 AU AU2011204683A patent/AU2011204683B2/en active Active
- 2011-01-06 MY MYPI2012003094A patent/MY159932A/en unknown
- 2011-01-06 CA CA2785868A patent/CA2785868C/en active Active
- 2011-01-06 WO PCT/CN2011/000027 patent/WO2011082657A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CA2785868A1 (en) | 2011-07-14 |
| MY159932A (en) | 2017-02-15 |
| AU2011204683A1 (en) | 2012-07-26 |
| AU2011204683B2 (en) | 2014-03-20 |
| WO2011082657A1 (en) | 2011-07-14 |
| CN102121118A (en) | 2011-07-13 |
| US20130186749A1 (en) | 2013-07-25 |
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| Date | Code | Title | Description |
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| EEER | Examination request |