AU2011204683B2 - Bottom structure of electrolytic cell - Google Patents
Bottom structure of electrolytic cell Download PDFInfo
- Publication number
- AU2011204683B2 AU2011204683B2 AU2011204683A AU2011204683A AU2011204683B2 AU 2011204683 B2 AU2011204683 B2 AU 2011204683B2 AU 2011204683 A AU2011204683 A AU 2011204683A AU 2011204683 A AU2011204683 A AU 2011204683A AU 2011204683 B2 AU2011204683 B2 AU 2011204683B2
- Authority
- AU
- Australia
- Prior art keywords
- cell
- carbon blocks
- cathode
- column
- cathode carbon
- 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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Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 48
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 4
- 238000005265 energy consumption Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 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
- 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
A bottom structure of an electrolytic cell is disclosed which comprises an electrolytic cell (1) and a cathode busbar (2). Columnar cathode carbon blocks (3) arranged at the bottom of the electrolytic cell (1) are perpendicular to the bottom of the electrolytic cell (1), and lower ends of the columnar cathode carbon blocks (3) are connected with the cathode busbars (2). By perpendicularly inserting the columnar cathode carbon blocks into the bottom of the electrolytic cell and by connecting the lower ends of the columnar cathode carbon blocks (3) with the cathode busbars, the current led from the anode block is moved downwardly through the aluminum liquid and the columnar cathode carbon blocks, thereby reducing the horizontal current. The cathode extending into the aluminum liquid can efficiently reduce the fluctuation of the aluminum liquid, thereby obtaining a stable surface of the aluminum liquid, reducing the distance between the anode and the cathode. A lower cell voltage thus obtained will in turn lead to an effect of reducing energy consumption.
Description
Cell bottom Structure of Electrolytic Cell Field of the Invention The present invention relates to a cell bottom structure of a reduction 5 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 10 placed horizontally, into which an electric current enters from an upper anode and is guided out of a lateral portion of the cell to form a turn of 90*, 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 15 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 20 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 25 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 is to 30 provide a cell bottom structure of a reduction cell, which can reduce horizontal electrical current in a layer of molten aluminum, eliminate stresses on a cell housing generated due to cathode expansion, simply the -1Istructure 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. The technical solution of the present invention is in that it comprises a 5 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 that a lower end of the column-shaped cathode carbon block is connected to the cathode bus. The column-shaped cathode carbon blocks are located below anode 10 carbon blocks. There is/are 1-4 column-shaped cathode carbon blocks provided below each anode carbon block. The column-shaped cathode carbon blocks extend a length of 5~200mm into molten aluminum of the reduction cell. 15 The column-shaped cathode carbon blocks are connected with the cathode bus through bolts. 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 20 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 25 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 of a cathode and an anode and lowering cell voltage so as to achieve the object 30 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 -2- 400-850mv, and an effect of saving 1200-2500kwh/t-Al is achieved. 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 5 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 10 conduction to be minimized. 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. 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 15 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. The column-shaped cathode carbon blocks are interconnected with the cathode bus through bolts, wherein the cross-sectional dimension of the bus and the 20 number of the bolts are determined in accordance with the magnitude of current. 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. 25 Brief Description of the Drawings Fig. 1 is a schematic view of the configuration of the present invention; Fig.2 is an A-A view of Fig. 1. 30 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 -3 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 5 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 10 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 1 arranged according to the present 15 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 20 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. 25 -4 -
Claims (6)
1. A cell bottom structure of a reduction cell comprising a reduction cell (1) and a cathode bus (2), characterized in that the bottom of the 5 reduction cell (1) is provided with column-shaped cathode carbon blocks (3) perpendicular to the bottom of the reduction cell (1), and that a lower end of the column-shaped cathode carbon block (3) is connected to the cathode bus (2). 10
2. The cell bottom structure of a reduction cell according to claim 1, characterized in that: the column-shaped cathode carbon blocks (3) are located below anode carbon blocks (4).
3. The cell bottom structure of a reduction cell according to claim 2, 15 characterized in that: there is/are 1-4 column-shaped cathode carbon blocks (3) provided below each anode carbon block (4).
4. The cell bottom structure of a reduction cell according to claim 1, characterized in that: the column-shaped cathode carbon blocks (3) extend a 20 length of 5-200mm into molten aluminum of the reduction cell (1).
5. The cell bottom structure of a reduction cell according to claim 1, characterized in that: the column-shaped cathode carbon blocks (3) are connected with the cathode bus (2) through bolts. 25
6. The cell bottom structure of a reduction cell according to claim 1, characterized in that: the column-shaped cathode carbon blocks (3) have a shape of quadrangular prism or quadrangular prism with steps. 30 -5S-
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010103000912A CN102121118A (en) | 2010-01-07 | 2010-01-07 | Cell bottom structure of electrolytic cell |
| CN201010300091.2 | 2010-01-07 | ||
| PCT/CN2011/000027 WO2011082657A1 (en) | 2010-01-07 | 2011-01-06 | Bottom structure of electrolytic cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2011204683A1 AU2011204683A1 (en) | 2012-07-26 |
| AU2011204683B2 true AU2011204683B2 (en) | 2014-03-20 |
Family
ID=44249779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2011204683A Active AU2011204683B2 (en) | 2010-01-07 | 2011-01-06 | Bottom structure of electrolytic 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 |
| NO347406B1 (en) * | 2012-12-21 | 2023-10-16 | Obshchestvo S Ogranichennoy Otvetstvennostyu Obedinennaya Kompaniya Rusal Inzhenerno Tekh Tsenter | 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5683559A (en) * | 1994-09-08 | 1997-11-04 | Moltech Invent S.A. | Cell for aluminium electrowinning employing a cathode cell bottom made of carbon blocks which have parallel channels therein |
Family Cites Families (6)
| 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 |
| 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 |
| CN201367471Y (en) * | 2009-03-05 | 2009-12-23 | 沈阳铝镁设计研究院 | Cathode carbon block structure |
| 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 |
-
2010
- 2010-01-07 CN CN2010103000912A patent/CN102121118A/en active Pending
-
2011
- 2011-01-06 WO PCT/CN2011/000027 patent/WO2011082657A1/en active Application Filing
- 2011-01-06 AU AU2011204683A patent/AU2011204683B2/en active Active
- 2011-01-06 CA CA2785868A patent/CA2785868C/en active Active
- 2011-01-06 US US13/520,894 patent/US20130186749A1/en not_active Abandoned
- 2011-01-06 MY MYPI2012003094A patent/MY159932A/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5683559A (en) * | 1994-09-08 | 1997-11-04 | Moltech Invent S.A. | Cell for aluminium electrowinning employing a cathode cell bottom made of carbon blocks which have parallel channels therein |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102121118A (en) | 2011-07-13 |
| CA2785868C (en) | 2015-04-14 |
| MY159932A (en) | 2017-02-15 |
| US20130186749A1 (en) | 2013-07-25 |
| CA2785868A1 (en) | 2011-07-14 |
| WO2011082657A1 (en) | 2011-07-14 |
| AU2011204683A1 (en) | 2012-07-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) |