CN100593042C - Method and structure for improving cathode current density of aluminium-electrolytic cell - Google Patents
Method and structure for improving cathode current density of aluminium-electrolytic cell Download PDFInfo
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- CN100593042C CN100593042C CN200610200265A CN200610200265A CN100593042C CN 100593042 C CN100593042 C CN 100593042C CN 200610200265 A CN200610200265 A CN 200610200265A CN 200610200265 A CN200610200265 A CN 200610200265A CN 100593042 C CN100593042 C CN 100593042C
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Abstract
This invention discloses an aluminum electrolytic trough cathode current density method and structure, wherein the aluminum electrolytic trough is embed with cathode bottom block with steel bar, whenembedding the steel bar into the cathode bottom block, making the steel bar into the shape whose middle section is large, two ends section is small, and the space between large section and small section is used a slope variable cross-section to connect, then embedding the steel bar in cathode bottom block, which can make the resistance at the electrolytic trough middle and border incline to consistent to improve the current disposition of the cathode bottom block and reduce the electrolytic corrosion of the cathode bottom block.
Description
Technical field
The present invention relates to a kind of method and structure that improves cathode current density of aluminium-electrolytic cell, belong to aluminum electrolyzing cell used cathode steel bar technical field.
Background technology
In aluminium cell, the carbon cathode sole piece will be derived electric current with cathode steel bar as electro-conductive liner.In the prior art, rod iron all adopts shapes such as constant rectangular parallelepiped in cross section or right cylinder, and electric current vertical channel section enters during owing to electrolysis, derives from the cross direction of channel section, cause the resistance difference of interior middle part of groove and limit portion, cause negative electrode sole piece electric current distribution peak value to occur in limit portion.The electric current distribution inequality not only can reduce the electric energy efficiency of electrolysis of aluminum, and dissects from secular electrolyzer and fully to show, the position electrochemical cathode seriously corroded that current density is high has a strong impact on work-ing life of negative electrode, and this just shortens electrolyzer
Time between overhaul, increase operation and maintenance cost.
Summary of the invention
The objective of the invention is to: provide a kind of method and structure that improves cathode current density of aluminium-electrolytic cell that improves cathode current distribution, improves electrolyzer stability, improves electric energy efficiency and prolong the work-ing life of electric tank cathode sole piece, to overcome the deficiencies in the prior art.
The present invention is achieved in that its method of improving cathode current density of aluminium-electrolytic cell is: comprise that aluminium cell is embedded with the negative electrode sole piece of rod iron, when rod iron is embedded the negative electrode sole piece, one section cross section is big in the middle of earlier rod iron being made into, one section cross section, two ends is little, and adopt the variable cross-section section of one section ramp type to connect between one section of one section and the small cross-section in the large section, and then rod iron embedded in the negative electrode sole piece, can make the resistance of electrolyzer middle part and limit portion negative electrode tend to consistent like this, to improve the distribution of current of negative electrode sole piece, weaken density peak value, reduce the galvanic corrosion of negative electrode sole piece; Also negative electrode sole piece and rod iron can be made into symmetrical two parts respectively, middle solid together with the carbon paste bundle, be about to rod iron and be made into that an end section is big, an end section is little, and adopt the variable cross-section section of one section ramp type to connect between one section of one section and the small cross-section in the large section, in the negative electrode sole piece, produce simultaneously the steel bar trough that matches with the rod iron shape, rod iron is inserted in the negative electrode sole piece, then two negative electrode sole pieces that insert rod iron are docking together, and making the big side butt joint in rod iron cross section, it is solid to stick with paste bundle with charcoal in the middle of its butt joint.
The structure of improving cathode current density of aluminium-electrolytic cell of the present invention is: the negative electrode sole piece and the rod iron that comprise aluminium cell, be provided with the steel bar trough that coincide with the rod iron shape in the negative electrode sole piece, rod iron inserts in the steel bar trough, the centre of rod iron is the large section section, the two ends of rod iron are the small cross-section section, are provided with the variable cross-section section of ramp type between large section section and small cross-section section; It comprises symmetrical two part negative electrode sole piece and rod irons, wherein an end of Yi Bufen rod iron is the large section section, the other end is the small cross-section section, between large section section and small cross-section section, be provided with the variable cross-section section of ramp type, rod iron inserts in the steel bar trough of negative electrode sole piece, the side butt joint that two part rod iron cross sections are big, the centre is provided with the charcoal that is used for fixing and sticks with paste; The large section section of rod iron, small cross-section section are 1: 1: 1 with the length ratio of variable cross-section section, and the bottom of rod iron is on same straight line, and the large section section is 1.3: 1 with the area ratio of small cross-section section.
Owing to adopted such scheme, analysis and the research of the present invention by cathode current density of aluminium-electrolytic cell is distributed, at the uneven current position, adopt the method and structure of variable cross-section cathode steel bar, the resistance at electrolysis trough side part and middle part is reached unanimity, weaken density peak value, improve the electric current distribution of aluminium electrolytic cell cathode, reduce limit portion horizontal current component.Therefore the present invention has the advantage that improves electrolyzer stability, improves electric energy efficiency and prolong the work-ing life of electric tank cathode sole piece.In the middle of being applicable to that aluminium cell is produced.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention;
Accompanying drawing 2 is the structural representation that the negative electrode sole piece of two steel bar troughs is arranged;
Accompanying drawing 3 is the structural representation that the negative electrode sole piece of a steel bar trough is arranged;
Accompanying drawing 4 is the structural representation that the negative electrode sole piece of circular steel bar trough is arranged.
Embodiment
Embodiments of the invention: during making, the cross section of rod iron 2 can be made into rectangle or circle, one section top thickening in centre with rod iron 2, be made into large section section 4, the two ends making of rod iron 2 is become the little small cross-section section 5 in cross section, between large section section 4 and small cross-section section 5, produce the variable cross-section section 6 of ramp type, the large section section 4 of rod iron 2, small cross-section section 5 is 1: 1: 1 with the length ratio of variable cross-section section 6, the bottom of rod iron 2 is on same straight line, and the area ratio of large section section 4 and small cross-section section 5 is 1.3: 1, make the mild transition in surface of rod iron 2, in negative electrode sole piece 1, process the steel bar trough 3 that coincide with rod iron 2 shapes, steel bar trough 3 can be processed into the rectangle double flute, single groove or circular groove, structure is as shown in Figure 2; Rod iron 2 is inserted steel bar trough 3 interior getting final product.Because the electric current in the electrolyzer flows into rod iron 2 from negative electrode sole piece 1, flow out from rod iron 2 two ends, and in the middle of rod iron 2, therefore convenient in order to make, negative electrode sole piece 1 and rod iron 2 can be divided into symmetrical two parts, end with rod iron 2 during making is made into large section section 4, the other end is made into small cross-section section 5, between large section section 4 and small cross-section section 5, produce the variable cross-section section 6 of ramp type, this moment, the large section section 4, small cross-section section 5 is 1: 2: 2 with the length ratio of variable cross-section section 6, in negative electrode sole piece 1, process the steel bar trough 3 that coincide with rod iron 2 shapes, so just easily rod iron 2 is inserted in the steel bar trough 3 of negative electrode sole piece 1, then two part negative electrode sole pieces 1 are fixed together, the side butt joint that rod iron 2 cross sections are big, the middle bundle with charcoal paste 7 stuck with paste together.The intermediate cross-section is big, two end sections are little owing to rod iron 2 is made into, and the shape that ramp type is arranged between two portions, make the resistance of electrolyzer middle part and limit portion negative electrode tend to consistent, improve the distribution of current of negative electrode sole piece 1, make current density reach unanimity, weaken the peak value of current density, reduced the galvanic corrosion of negative electrode sole piece 1, reached the purpose that improves electrolyzer stability, improves electric energy efficiency and prolong the work-ing life of electric tank cathode sole piece 1.
Claims (5)
1. method of improving cathode current density of aluminium-electrolytic cell, comprise that aluminium cell is embedded with the negative electrode sole piece of rod iron, it is characterized in that: when rod iron is embedded the negative electrode sole piece, one section cross section is big in the middle of earlier rod iron being made into, one section cross section, two ends is little, and adopt the variable cross-section section of one section ramp type to connect between one section of one section and the small cross-section in the large section, and then rod iron embedded in the negative electrode sole piece, can make the resistance of electrolyzer middle part and limit portion negative electrode tend to consistent like this, to improve the distribution of current of negative electrode sole piece, weaken density peak value, reduce the galvanic corrosion of negative electrode sole piece.
2. the method for improving cathode current density of aluminium-electrolytic cell according to claim 1, it is characterized in that: negative electrode sole piece and rod iron are made into symmetrical two parts respectively, middle solid together with the carbon paste bundle, being about to rod iron, to be made into an end section big, one end section is little, and adopt the variable cross-section section of one section ramp type to connect between one section of one section and the small cross-section in the large section, in the negative electrode sole piece, produce simultaneously the steel bar trough that matches with the rod iron shape, rod iron is inserted in the negative electrode sole piece, then two negative electrode sole pieces that insert rod iron are docking together, and making the big side butt joint in rod iron cross section, it is solid to stick with paste bundle with charcoal in the middle of its butt joint.
3. structure of improving cathode current density of aluminium-electrolytic cell, the negative electrode sole piece (1) and the rod iron (2) that comprise aluminium cell, be provided with the steel bar trough (3) that coincide with rod iron (2) shape in the negative electrode sole piece (1), rod iron (2) inserts in the steel bar trough (3), it is characterized in that: the centre of rod iron (2) is large section section (4), the two ends of rod iron (2) are small cross-section section (5), are provided with the variable cross-section section (6) of ramp type between large section section (4) and small cross-section section (5).
4. the structure of improving cathode current density of aluminium-electrolytic cell according to claim 3, it is characterized in that: comprise symmetrical two part negative electrode sole pieces (1) and rod iron (2), wherein an end of Yi Bufen rod iron (2) is large section section (4), the other end is small cross-section section (5), between large section section (4) and small cross-section section (5), be provided with the variable cross-section section (6) of ramp type, rod iron (2) inserts in the steel bar trough (3) of negative electrode sole piece (1), the side butt joint that two part rod iron (2) cross sections are big, the centre is provided with the charcoal that is used for fixing and sticks with paste (7).
5. the structure of improving cathode current density of aluminium-electrolytic cell according to claim 3, it is characterized in that: the large section section (4) of rod iron (2), small cross-section section (5) are 1: 1: 1 with the length ratio of variable cross-section section (6), the bottom of rod iron (2) is on same straight line, and large section section (4) is 1.3: 1 with the area ratio of small cross-section section (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610200265A CN100593042C (en) | 2006-03-17 | 2006-03-17 | Method and structure for improving cathode current density of aluminium-electrolytic cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610200265A CN100593042C (en) | 2006-03-17 | 2006-03-17 | Method and structure for improving cathode current density of aluminium-electrolytic cell |
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| CN1844467A CN1844467A (en) | 2006-10-11 |
| CN100593042C true CN100593042C (en) | 2010-03-03 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL1845174T3 (en) * | 2006-04-13 | 2011-10-31 | Sgl Carbon Se | Cathodes for aluminium electrolysis cell with non-planar slot design |
| DE102010041082A1 (en) * | 2010-09-20 | 2012-03-22 | Sgl Carbon Se | Cathode for electrolysis cells |
| CN102453927B (en) * | 2010-10-19 | 2013-08-14 | 沈阳铝镁设计研究院有限公司 | Method for greatly reducing horizontal current in aluminum liquid of aluminum electrolytic cell |
| CN102758216B (en) * | 2011-04-29 | 2015-04-15 | 沈阳铝镁设计研究院有限公司 | Method for homogenizing current distribution in aluminum liquid in aluminum electrolytic cell |
| CN102925925A (en) * | 2011-08-10 | 2013-02-13 | 贵阳铝镁设计研究院有限公司 | Variable cross section type steel bar cathode structure |
| CN102703934B (en) * | 2012-06-08 | 2015-05-20 | 云南铝业股份有限公司 | Method for improving calcination temperature evenness of aluminium electrolysis cell |
| CN102978665B (en) * | 2012-12-21 | 2016-05-18 | 江西稀有金属钨业控股集团有限公司 | A kind of special-shaped tungsten cathode or molybdenum negative electrode |
| CN103243350B (en) * | 2013-05-20 | 2015-10-21 | 中南大学 | A kind of aluminum cell side conductive cathode structure reducing aluminum liquid horizontal electric current |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4654133A (en) * | 1985-02-07 | 1987-03-31 | Aluminium Pechiney | Hall-Heroult electrolysis tank with asymmetrical cathodic bars and heat insulation |
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2006
- 2006-03-17 CN CN200610200265A patent/CN100593042C/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4654133A (en) * | 1985-02-07 | 1987-03-31 | Aluminium Pechiney | Hall-Heroult electrolysis tank with asymmetrical cathodic bars and heat insulation |
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| CN1844467A (en) | 2006-10-11 |
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