CN201354389Y - Combination-type cathode of aluminum electrolytic cell - Google Patents
Combination-type cathode of aluminum electrolytic cell Download PDFInfo
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- CN201354389Y CN201354389Y CNU2009203007011U CN200920300701U CN201354389Y CN 201354389 Y CN201354389 Y CN 201354389Y CN U2009203007011 U CNU2009203007011 U CN U2009203007011U CN 200920300701 U CN200920300701 U CN 200920300701U CN 201354389 Y CN201354389 Y CN 201354389Y
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Abstract
The utility model discloses a combination-type cathode of an aluminum electrolytic cell, which comprises cathode carbon blocks (1) of normal specification arranged at the bottom of the aluminum electrolytic cell, a cathode steel bar (4), and a carbon paste (3). An irregular cathode block (2) with the height or width unequal to the cathode carbon blocks (1) is arranged between the two cathode carbon blocks (1); the bottom part of the irregular cathode block (2) is mounted at the same height as the cathode carbon blocks (1); and the height difference of the end surfaces of the irregular cathode block (2) and the cathode carbon blocks (1) is 0 to 200 mm. The utility model can better improve the interfacial stability of aluminum liquid electrolyte in the aluminum electrolytic cell; and polar distance during regular production can be reduced effectively, thereby obtaining lower electrolytic cell working voltage, and achieving the effect of energy conservation and consumption reduction.
Description
Technical field
The utility model relates to a kind of combined cathode of aluminium cell, belongs to the aluminium cell technical field.
Background technology
Along with the raising of aluminium cell design and operative technique level, the aluminium cell of international and domestic new design and construction develops to the direction that maximizes day by day.Potline current inevitably can be increased to 550kA～700kA in addition more than.In recent years, the aluminum electrolyzation technology of China has also obtained considerable progress, can meet or exceed international most advanced level on the electrolyzer capacity.But aspect energy-saving and cost-reducing, still exist bigger gap with advanced international standard.At present, the direct current consumption of domestic each aluminium manufacturer is paced up and down about 13200-3500kWh/T.Al, in addition have near 14000kWh/T.Al, have sizable potentiality to excavate.Particularly under the situation that domestic economy environment is very severe at present, just more urgent to requirements of saving energy
In Aluminium Electrolysis, energy-conservation approach is a lot.In theory, the power consumption rate only depends on the average voltage V of current efficiency and electrolyzer
FlatAnd the average voltage of aluminium cell mainly comprises three parts, that is:
V
Flat=Δ V
Groove+ Δ V
Female+ Δ V
Imitate
Δ V wherein
FemaleFor Δ V falls in the outer busbar voltage of groove
ImitateFor anode effect is shared volts lost, Δ V
GrooveBe electric tank working voltage, can be decomposed into again: anode, negative electrode, electrolyte voltage are fallen and counter-electromotive force (or claiming actual decomposition voltage), promptly
V
Groove=Δ V
Sun+ Δ V
Cloudy+ Δ V
Matter+ E
Instead
By calculating as can be known, counter-electromotive force and electrolyte voltage are fallen and are accounted for 35%～40% of average voltage respectively, are two sports in the average voltage.Counter-electromotive force is a definite value substantially, so want to reduce power consumption, primary is to reduce electrolyte voltage Δ V
Matter
Simultaneously according to production practice, experiment, and calculate as can be known, the flow rate of aluminium liquid that typical big face multiple spot advances the electrit electrolyzer distributes as shown in Figure 7, the feature of these velocity flow profile is all very similar as seen in Figure 7.Certainly, when ordinary production, because the variation of operational condition, stove rod, bearth precipitation etc., the velocity flow profile of surveying out has certain difference, but to be distributed with several features be constant to the flow rate of aluminium liquid that advances the electrit electrolyzer for big face multiple spot in general, that is: the vortex of generation along the electrolyzer length direction distribute, High Velocity Area is positioned at each vortex and is positioned at groove two ends (flue end and aluminium inlet) and the big face zone near two ends near the zone of the zone of stove group, groove Peak Flow Rate.The existence of high flow rate vortex simultaneously can make aluminium liquid bath surface produce bigger protuberance and fluctuation, and then it is unstable that aluminium liquid electrolyte interface is produced, and energy consumption increases.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of and make aluminium cell obtain satisfactory stability by the negative electrode that changes aluminium cell, to reach effect energy-conservation, consumption reduction.Can overcome the deficiencies in the prior art.
The technical solution of the utility model; It comprises pricking between cathode block, cathode steel bar and the carbon of the common specification that is arranged on aluminum electrolytic cell bottom sticks with paste, and is provided with the specially-shaped cathode piece that height or width and cathode carbon pieces do not wait between two cathode blocks.
The bottom mounting height of specially-shaped cathode piece is identical with cathode block.
The end face height of specially-shaped cathode piece and the end face difference of altitude of cathode block are 0～200mm.
The width of every specially-shaped cathode piece is identical, and width range is 50～300mm.
Be an isometric charcoal piece or form with the isometric specially-shaped cathode piece of cathode block by 2～6 short specially-shaped cathode pieces splicings.
The material of making the specially-shaped cathode piece is smokeless coal pieces, semi-graphite charcoal piece, semi-graphited or graphitized charcoal piece.
Compared with prior art, the utility model is by being provided with the special-shaped cathode piece that a height or width and cathode carbon pieces do not wait between two conventional cathode charcoal pieces, so just can destroy the distribution of velocity field in the aluminium liquid that existing electromagnetic force produced by the special-shaped cathode piece, the effect that reach energy-conservation, cuts down the consumption of energy.The bottom mounting height of specially-shaped cathode piece is identical with cathode block, and such setting can be convenient to the assembling of aluminium cell.The difference of altitude of the end face height of specially-shaped cathode piece and common cathode block end face is 0～200mm, different in nature cathode block between two cathode carbon pieces just can form the projection band of some amount at existing smooth cathode surface like this, the purpose that is provided with like this is in order to overcome the vortex (as Fig. 7) that existing smooth cathode carbon pieces produces, by evidence and Fig. 8 as seen, the projection band (special-shaped cathode piece end face is higher than the cathode carbon pieces part) of some amount is set on existing smooth cathode block surface, can certain obstacle be set to the aluminium liquid of high-flow area, destroy vortex as forming among Fig. 7, the distribution of velocity field in the aluminium liquid that the existing aluminium cell electromagnetic force of destruction is produced, make it become incoherent, make aluminium liquid can not produce bigger protuberance and fluctuation, thereby obtain stability preferably.And stability electrolyzer preferably, pole span can be lower during production, energy consumption is also lower.Distribute along the electrolyzer length direction simultaneously according to the flow rate of aluminium liquid of Fig. 7 vortex that produces as can be seen that distributes, and high-flow area is positioned at the groove two ends, so the height of the specially-shaped cathode piece between two cathode carbon pieces also there are differences, promptly exceed the zone of cathode carbon pieces part, quantity and position are also uncertain, the reason that is provided with like this is according to the Distribution of Magnetic Field of existing aluminium electrolysis cell and fixed, its objective is in order better to adapt to all kinds of electrolyzers and to destroy the distribution of velocity field in the aluminium liquid that original electromagnetic force produces, reach further energy-conservation, the effect that cuts down the consumption of energy; The maximum value of difference of altitude is 200mm, its objective is normally to go out aluminium when satisfy producing.The width of specially-shaped cathode piece is identical, and width range is 50～300mm, and such width range can guarantee the stability of aluminium cell.Be an isometric charcoal piece or form with the isometric specially-shaped cathode piece of cathode block, can better regulate the thermal equilibrium of aluminium cell like this, the phenomenon of feeling cold of minimizing electrolyzer by 2～6 short specially-shaped cathode pieces splicings.The material of making specially-shaped cathode carbon piece is smokeless coal pieces, semi-graphite charcoal piece or semi-graphited or graphitized charcoal piece, above-mentioned making material is the material of making existing cathode carbon pieces, do not need other exotic materials, so the utility model can not increase too many fund in addition.Simultaneously the utility model also have to electrolyzer change less, advantage such as good energy-conserving effect, have good economic benefits, promotional value and practical value.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that the Y of Fig. 1 is to view;
Fig. 3 is that specially-shaped cathode piece 2 is by 4 sections short special-shaped cathode piece splicing construction synoptic diagram;
Fig. 4 is the interconnected synoptic diagram of specially-shaped cathode piece 2 height;
Fig. 5 is that the part Y of Fig. 4 is to view;
Structural representation when Fig. 6 only is disposed at the groove two ends for the end face of specially-shaped cathode piece 2 is higher than cathode carbon pieces;
Big multiple spot of the existing 160kA of Fig. 7 advances electrit electrolyzer flow rate of aluminium liquid distribution plan;
Big multiple spot of 160kA advanced electrit electrolyzer flow rate of aluminium liquid distribution plan after Fig. 8 adopted the utility model;
Fig. 9 advances electrit electrolyzer flow rate of aluminium liquid distribution plan for big multiple spot of 160kA after adopting Fig. 4 distributing style;
Figure 10 advances electrit electrolyzer flow rate of aluminium liquid distribution plan for big multiple spot of 160kA after adopting Fig. 6 distributing style.
Embodiment
Embodiment 1: as shown in Figure 1, the cathode block 1 of common specification and specially-shaped cathode carbon piece 2 all are arranged on the bottom of aluminium cell, in common specification cathode block 1, be provided with cathode steel bar 4, aluminium electrolytic cell cathode is spliced into aluminium electrolysis cathode by pricking paste 3 between carbon by the cathode block 1 and specially-shaped cathode carbon piece 2 interconnected the forming of common specification between cathode block 1 and the specially-shaped cathode carbon piece 2.Accepted standard is when making and splice, and the bottom of the cathode block 1 of common specification and specially-shaped cathode carbon piece 2 is positioned at same absolute altitude, and the line position that goes out of cathode steel bar 4 is positioned at same absolute altitude, (as Fig. 1); Back aluminium electrolytic cell cathode side-view be staggered so just as shown in Figure 2.Here the material of making specially-shaped cathode carbon piece 2 is smokeless coal pieces, semi-graphite charcoal piece, semi-graphited or graphitized charcoal piece, and above-mentioned making material is the material of making existing cathode carbon pieces, does not need other exotic materials, therefore can not increase too many cost.The purpose that specially-shaped cathode piece 2 is set is in order to overcome the vortex that existing smooth cathode carbon pieces produces, therefore when the difference of altitude of special-shaped cathode piece 2 and cathode carbon pieces 1 greater than 0 less than 200 the time, the aluminium electrolysis cathode surface that is spliced into will form at interval projection band uniformly, the height of projection band is many between 50～200mm, aluminium liquid did not have 30～150mm of these the raised areas when ordinary production, the projection band of this height just can well destroy aluminium liquid flow field, aluminium liquid flow field after the destruction as shown in Figure 8, the stability of aluminium cell is increased, can in ordinary production, further reduce pole span, play energy-saving and cost-reducing effect.The width of opposite sex cathode block 2 is 50～300mm, length and cathode block 1 are isometric, but can form for an isometric charcoal piece or by 2～6 short specially-shaped cathode pieces splicings with the specially-shaped cathode piece 2 that cathode block 1 is isometric, as shown in Figure 3 exactly with 2 ways that are divided into 4 sections of every specially-shaped cathode.
Embodiment 2: though it is obvious to press the effect that the method for embodiment 1 implements, the problem that too much bottom land projection is brought is to produce a large amount of minimizing of aluminium amount, may make the thermal equilibrium of aluminium cell be difficult to set up, and the phenomenon that electrolyzer feels cold occurs.Therefore in order better to regulate the thermal equilibrium of aluminium cell, we take to reduce the volume of special-shaped cathode piece end face the raised area, even part special-shaped cathode piece 2 is 0 with the difference of altitude of cathode carbon pieces 1, shown in Figure 4 and 5, can select two kinds of highly different specially-shaped cathode carbon pieces 2, wherein a kind of height is higher than the cathode block 50～200mm of common specification, and the cathode block of another kind of and common specification is contour, the quantity of two kinds of special-shaped pieces is basic identical, and is also interconnected.Be equivalent to just have every the cathode block 1 of two common specifications the specially-shaped cathode carbon piece of 1 projection, promptly the quantity of cathode surface projection band is half of scheme 1, so also can improve the flow velocity (as shown in Figure 9) of aluminium liquid layer, improves the stability of electrolyzer.This scheme can reach the effect that improves velocity field, improves stability, thermally equilibrated maintenance when being convenient to produce applicable to long grooved.
Embodiment 3: above-mentioned two examples all are with the at interval uniform decoration form of projection band (promptly exceeding the specially-shaped cathode carbon piece 2 of cathode carbon pieces 1), in fact advance electrit electrolyzer flow rate of aluminium liquid feature according at present big face multiple spot, we also can concentrate projection band (being high specially-shaped cathode carbon piece) and be arranged at the bigger zone of flow velocity (generally being two facet end regions near groove), and in the central region of aluminium cell, can establish less and even not establish the different in nature charcoal piece 2 that has difference of altitude, as shown in Figure 6.So also can play the flow velocity (as shown in figure 10) that improves the aluminium liquid layer, improve the effect of the stability of electrolyzer, the consumption of cathode material is also minimum simultaneously.
Need to prove embodiment 2, in fact aborning do not work to improve the flow field with the contour specially-shaped cathode carbon piece of conventional cathode carbon piece 1 in 3, also can cancel need not, and direct cathode block with two common specifications (sticking with paste by pricking) splicing, but such consequence will be that the distance between cathode steel bar is inhomogeneous, increased difficulty for the design of groove, thus the utility model still keeps this (contour with the conventional cathode piece) specially-shaped cathode carbon piece, but do not repel the way that will play cancellation yet.
Claims (6)
1. the combined cathode of an aluminium cell, it comprises pricking between the cathode block (1), carbon of the common specification that is arranged on aluminum electrolytic cell bottom sticks with paste (3) and cathode steel bar (4), it is characterized in that: be provided with between two cathode blocks (1) highly or specially-shaped cathode piece (2) that width and cathode carbon pieces (1) do not wait.
2. the combined cathode of 1 described aluminium cell as requested, it is characterized in that: the bottom mounting height of specially-shaped cathode piece (2) is identical with cathode block (1).
3. the combined cathode of 1 or 2 described aluminium cells as requested, it is characterized in that: the end face difference of altitude of the end face height of specially-shaped cathode piece (2) and cathode block (1) is 0～200mm.
4. the combined cathode of 1 or 2 described aluminium cells as requested, it is characterized in that: the width of every specially-shaped cathode piece (2) is identical, and width range is 50～300mm.
5. the combined cathode of 1 described aluminium cell as requested is characterized in that: be an isometric charcoal piece or be made up of 2～6 short specially-shaped cathode pieces splicings with the isometric specially-shaped cathode piece (2) of cathode block (1).
6. the combined cathode of 1 described aluminium cell as requested, it is characterized in that: the material of making specially-shaped cathode piece (2) is smokeless coal pieces, semi-graphite charcoal piece, semi-graphited or graphitized charcoal piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203007011U CN201354389Y (en) | 2009-02-18 | 2009-02-18 | Combination-type cathode of aluminum electrolytic cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203007011U CN201354389Y (en) | 2009-02-18 | 2009-02-18 | Combination-type cathode of aluminum electrolytic cell |
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| CN201354389Y true CN201354389Y (en) | 2009-12-02 |
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| CNU2009203007011U Expired - Lifetime CN201354389Y (en) | 2009-02-18 | 2009-02-18 | Combination-type cathode of aluminum electrolytic cell |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949035A (en) * | 2010-09-30 | 2011-01-19 | 广西强强碳素股份有限公司 | Novel composite graphitized deformed cathode for aluminium electrolysis |
| CN102002731A (en) * | 2010-10-14 | 2011-04-06 | 王飚 | Energy-saving fused salt aluminum electrolysis cell and method thereof |
| WO2011079526A1 (en) * | 2009-12-31 | 2011-07-07 | 中铝国际工程有限责任公司 | Method for allocating cathodes of aluminum electrolytic cell |
| WO2011082659A1 (en) * | 2010-01-07 | 2011-07-14 | 中铝国际工程有限责任公司 | Cathode with protrusion structure for aluminum electrolytic cell |
| CN102560544A (en) * | 2012-01-13 | 2012-07-11 | 中南大学 | Percolating type aluminium electrolytic cell and method for stabilizing molten aluminium in electrolytic cell |
| CN102560539A (en) * | 2010-12-17 | 2012-07-11 | 贵阳铝镁设计研究院有限公司 | Method for inhibiting voltage swing of aluminum reduction cell and baffle wall-carrying cathode of aluminum reduction cell |
-
2009
- 2009-02-18 CN CNU2009203007011U patent/CN201354389Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011079526A1 (en) * | 2009-12-31 | 2011-07-07 | 中铝国际工程有限责任公司 | Method for allocating cathodes of aluminum electrolytic cell |
| AU2010338951B2 (en) * | 2009-12-31 | 2014-01-09 | China Aluminum International Engineering Corporation Limited | Method for allocating cathodes of aluminum electrolytic cell |
| WO2011082659A1 (en) * | 2010-01-07 | 2011-07-14 | 中铝国际工程有限责任公司 | Cathode with protrusion structure for aluminum electrolytic cell |
| CN101949035A (en) * | 2010-09-30 | 2011-01-19 | 广西强强碳素股份有限公司 | Novel composite graphitized deformed cathode for aluminium electrolysis |
| CN102002731A (en) * | 2010-10-14 | 2011-04-06 | 王飚 | Energy-saving fused salt aluminum electrolysis cell and method thereof |
| CN102002731B (en) * | 2010-10-14 | 2013-08-14 | 王飚 | Energy-saving fused salt aluminum electrolysis cell and method thereof |
| CN102560539A (en) * | 2010-12-17 | 2012-07-11 | 贵阳铝镁设计研究院有限公司 | Method for inhibiting voltage swing of aluminum reduction cell and baffle wall-carrying cathode of aluminum reduction cell |
| CN102560544A (en) * | 2012-01-13 | 2012-07-11 | 中南大学 | Percolating type aluminium electrolytic cell and method for stabilizing molten aluminium in electrolytic cell |
| CN102560544B (en) * | 2012-01-13 | 2014-08-06 | 中南大学 | Percolating type aluminium electrolytic cell and method for stabilizing molten aluminium in electrolytic cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUIYANG ALUMINUM AND MAGNESIUM DESIGN INSTITUTE CO Free format text: FORMER NAME: GUIYANG ALUMINIUM AND MAGNESIUM DESIGN INST. |
|
| CP03 | Change of name, title or address |
Address after: 550081 Guiyang Province, Jinyang New District, Zhu Zhu Road, No. 2 Patentee after: Guiyang Aluminum & Magnesium Design Institute Co., Ltd. Address before: 550004 No. 208, Beijing Road, Guiyang, Guizhou Patentee before: Guiyang Aluminium and Magnesium Design Inst. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20091202 |
|
| CX01 | Expiry of patent term |