CN101037775A - Lining structure of large-scale pre-baking aluminium electrolysis trough - Google Patents
Lining structure of large-scale pre-baking aluminium electrolysis trough Download PDFInfo
- Publication number
- CN101037775A CN101037775A CN 200710048985 CN200710048985A CN101037775A CN 101037775 A CN101037775 A CN 101037775A CN 200710048985 CN200710048985 CN 200710048985 CN 200710048985 A CN200710048985 A CN 200710048985A CN 101037775 A CN101037775 A CN 101037775A
- Authority
- CN
- China
- Prior art keywords
- lining structure
- aluminium electrolysis
- electrolysis trough
- sidepiece
- scale pre
- 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.)
- Pending
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 33
- 239000004411 aluminium Substances 0.000 title claims abstract description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 24
- 239000011449 brick Substances 0.000 claims abstract description 24
- 239000003610 charcoal Substances 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- 238000000576 coating method Methods 0.000 claims abstract description 13
- 239000010425 asbestos Substances 0.000 claims abstract description 7
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims description 17
- 239000010439 graphite Substances 0.000 claims description 16
- 229910002804 graphite Inorganic materials 0.000 claims description 16
- 230000004888 barrier function Effects 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 9
- 239000003818 cinder Substances 0.000 claims description 6
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- JHXCINJSAAFBDH-UHFFFAOYSA-N [Ca].O[Si](O)(O)O Chemical compound [Ca].O[Si](O)(O)O JHXCINJSAAFBDH-UHFFFAOYSA-N 0.000 claims description 4
- 239000011734 sodium Substances 0.000 abstract description 11
- 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 abstract description 10
- 229910052708 sodium Inorganic materials 0.000 abstract description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052918 calcium silicate Inorganic materials 0.000 abstract description 2
- 239000000378 calcium silicate Substances 0.000 abstract description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 abstract description 2
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 abstract 1
- 229910033181 TiB2 Inorganic materials 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 13
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 8
- 230000008595 infiltration Effects 0.000 description 6
- 238000001764 infiltration Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 3
- 229910000754 Wrought iron Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- Electrolytic Production Of Metals (AREA)
Abstract
The invention relates to an improvement of apparatus in aluminium electrolytic industry, specially relate to a large-sized lining structure for prebaking aluminium electrolysis. The inventive lining structure has, on the bottom of electrolytic cell housing, from the bottom up, in order, asbestos plate layer, heat-insulating layer made of calcium silicate plate with heat-resisting, heat-insulating layer made of both layers light-weight bricks, impermeable layer made of one layer alumina, impermeable layer made of both layers firebricks, half-graphite-rod-cathode complex TiB2 coating, with the leteral of allotypic lateral mass. The advantages of the invention are that: (1) the structure has higher heat conductivity, lower electrical resistivity and low dilatability of electrolytic sodium, and current distribution in cathodic charcoal is more uniform; (2) impermeable layer is especially advantageous for prolonging the life of electrolytic cell; (3) allotypic lateral mass has higher thermal conductivity and lower electrical resistivity, in particular, prolonging the the life of electrolytic cell. The large-sized lining structure for prebaking aluminium electrolysis of more than 200kA is used in the invention.
Description
Technical field
The present invention relates to a kind of improvement of electrolysis of aluminum industry equipment, specifically relate to a kind of lining structure of large-scale pre-baking aluminium electrolysis trough.
Background technology
Index and cell life that the design relation of cell lining is produced to electrolyzer.It is generally acknowledged that good liner design is wanted to satisfy the thermally equilibrated particular requirement of electrolyzer, will form a good heat radiation on the top of groove side, to guarantee forming regular stove group in the groove.Groove side lower part and bottom need good insulation, save energy, prevent long stretching one's legs.Will pay special attention in addition to guarantee that by the selection and the combination of bottom lagging material 900 ℃ of temperature line drop under the cathode carbon pieces, 800 ℃ of thermoisopleths are positioned on the insulating brick.If the design of the inner lining structure of aluminium cell is unreasonable, can make aluminium cell generation early damage, reduce the aluminum electrolyzation technology economic target, as current efficiency, ton aluminium direct current consumption.
The inner lining structure of the aluminium cell that domestic 200kA is above generally adopts: inner lining structure adopts one deck asbestos plate, one deck calcium silicate board, two-layer light cinder brick, the anti-bleed of one deck dry type from top to bottom successively, contains 6～10% semi-graphite cathode carbon block.Sidepiece is a semi-graphite charcoal piece.This kind inner lining structure, exist following improper part: (1) bottom is adopted and is contained 6～10% semi-graphite cathode carbon block, because thermal conductivity is on the low side, resistivity is on the low side and the na expansion rate is higher, the na expansion that in electrolysis production, can not effectively prevent the infiltration of sodium in the ionogen and cause, (2) the anti-bleed of dry type is because the anti-bleed of lightweight can not compare NaF-Na
3AlF
6Eutectic temperature (888 ℃) height, even also low 30 ℃, also can not effectively prevent the infiltration of sodium in the ionogen and produce a large amount of greyish white layers in the cathode carbon pieces bottom; (3) sidepiece is a semi-graphite charcoal piece, because this electric conductivity is high and thermal conductivity is low, easily produces electric leakage and can not form regular burner hearth at sidepiece at sidepiece in electrolysis production.The inner lining structure of this kind aluminium cell, the life-span of electrolyzer differs more than 1000 days with aluminium cell life-span of international most advanced level on average between 1200～1500 days.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiency that prior art exists, a kind of have higher heat conductivity, lower resistivity and lower electrolytic sodium rate of expansion are provided, the thermograde and the distribution of current in the cathode carbon pieces that can reduce in the cathode carbon pieces are more even, can prevent the generation of bearth precipitation, reduce the furnace bottom pressure drop, have the lining structure of large-scale pre-baking aluminium electrolysis trough of higher thermal conductivity and lower resistivity.
A kind of lining structure of large-scale pre-baking aluminium electrolysis trough of the present invention is achieved by following technical proposals: a kind of lining structure of large-scale pre-baking aluminium electrolysis trough of the present invention has been built the asbestos flaggy by laying bricks or stones from top to bottom successively in the electrolytic bath shell bottom, the thermal insulation layer that high temperature resistant silicic acid calcium plate constitutes, the thermal insulation layer that two-layer light cinder brick constitutes, the impervious barrier that one deck aluminum oxide constitutes, the impervious barrier that two-layer refractory brick constitutes, semi-graphite cathode composite Ti B
2Coating, sidepiece are special-shaped lateral mass.
A kind of lining structure of large-scale pre-baking aluminium electrolysis trough of the present invention compared with prior art has following beneficial effect: a kind of lining structure of large-scale pre-baking aluminium electrolysis trough of the present invention has the following advantages: (1) bottom is adopted and is contained 30% semi-graphite cathode composite Ti B
2Coating, because this kind cathode carbon pieces has higher heat conductivity, lower resistivity and lower electrolytic sodium rate of expansion, the na expansion that can effectively prevent the infiltration of sodium in the ionogen and produce, and the thermograde and the distribution of current in the cathode carbon pieces that can reduce in the cathode carbon pieces are more even.In addition, compound TiB on the cathode carbon pieces
2Coating can further reduce the infiltration of sodium in the ionogen, can prevent the generation of bearth precipitation, reduces the furnace bottom pressure drop; (2) impervious barrier adopts one deck 50mm aluminum oxide, two-layer 65mm refractory brick, and the specification of this kind refractory brick is 230 * 230mm, SiO
2Content is up to 60%, because the high Si content of this kind has increased and NaAlSiO
4Corresponding high viscosity phase NaAlSi
3O
8Formation, refractory materials NaAlSi
3O
8The pressure of phase is to prolonging the cell life particularly advantageous; (3) sidepiece is 70mmSiC composite S i
3N
4The special-shaped lateral mass of charcoal piece, SiC composite S i
3N
4The charcoal piece has higher thermal conductivity and lower resistivity, can help the formation of sideways furnace wall, and compound special-shaped lateral mass on this, so, " slope " is more firm, because the electric current in the negative electrode has this delta-shaped region conduction of quite most of process, so the charcoal paste layer thickness of attenuate periphery, it is very helpful replacing elongated trilateral charcoal piece, helps especially to prolong bath life.The alumina layer temperature-stable of lining structure of large-scale pre-baking aluminium electrolysis trough aluminium cell of the present invention is controlled at about 800 ℃; The sideways furnace wall thickness of aluminium cell on average between 120～150mm, has formed shape in the regular burner hearth; The furnace bottom pressure drop average out to 320mV of aluminium cell.A kind of lining structure of large-scale pre-baking aluminium electrolysis trough of the present invention can be used the inner lining structure of the above large-scale pre-baked aluminum electrolysis cell of 200kA.
Description of drawings
A kind of lining structure of large-scale pre-baking aluminium electrolysis trough of the present invention has following accompanying drawing:
Fig. 1 is a kind of lining structure of large-scale pre-baking aluminium electrolysis trough synoptic diagram of the present invention;
Fig. 2 is the special-shaped lateral mass structural representation of a kind of lining structure of large-scale pre-baking aluminium electrolysis trough sidepiece of the present invention.
Wherein: 1, asbestos flaggy; 2, Calucium Silicate powder flaggy; 3, light cinder brick layer; 4, alumina layer; 5, fire brick layer; 6, the compound TB2 coating of semi-graphite cathode; 7, the special-shaped lateral mass of sidepiece; 8, SiC composite S i
3N
4Layer; 9, charcoal piece; 10, rod iron.
Embodiment
Below in conjunction with drawings and Examples a kind of lining structure of large-scale pre-baking aluminium electrolysis trough technical scheme of the present invention is further described.
As shown in Figure 1 and Figure 2, a kind of lining structure of large-scale pre-baking aluminium electrolysis trough of the present invention has been built asbestos flaggy 1 by laying bricks or stones from top to bottom successively in the electrolytic bath shell bottom, the thermal insulation layer 2 that high temperature resistant silicic acid calcium plate constitutes, the thermal insulation layer 3 that two-layer light cinder brick constitutes, the impervious barrier 4 that one deck aluminum oxide constitutes, the impervious barrier 5 that two-layer refractory brick constitutes, semi-graphite cathode composite Ti B
2Coating 6, sidepiece are special-shaped lateral mass 7.
Described semi-graphite cathode composite Ti B
2Coating 6 contains 30% graphite; Described refractory brick impervious barrier 5 contains 60% SiO
2
Described special-shaped lateral mass 7 is sidepiece SiC composite S i
3 N
48 with the special-shaped charcoal piece of sidepiece 9 be combined intos.
Embodiment 1.
As shown in Figure 1 and Figure 2, inner lining structure electrolytic bath shell of the present invention bottom has been built asbestos flaggy 1 from top to bottom successively by laying bricks or stones, the thermal insulation layer 2 that high temperature resistant silicic acid calcium plate constitutes, the thermal insulation layer 3 that two-layer light cinder brick constitutes, the impervious barrier 4 that one deck aluminum oxide constitutes, the impervious barrier 5 that two-layer refractory brick constitutes, semi-graphite cathode composite Ti B
2Coating 6, sidepiece are special-shaped lateral mass 7; The bottom is adopted and is contained 30% semi-graphite cathode composite Ti B
2Coating, because this kind cathode carbon pieces has higher heat conductivity, lower resistivity and lower electrolytic sodium rate of expansion, the na expansion that can effectively prevent the infiltration of sodium in the ionogen and produce, and the thermograde and the distribution of current in the cathode carbon pieces that can reduce in the cathode carbon pieces are more even.In addition, compound TiB on the cathode carbon pieces
2Coating can further reduce the infiltration of sodium in the ionogen, can prevent the generation of bearth precipitation, reduces the furnace bottom pressure drop; At fire brick layer 5 and semi-graphite cathode composite Ti B
2It between the coating 6 rod iron 10 that is bonded as one with cathode carbon pieces.
Described refractory brick impervious barrier 5 contains 60% SiO
2, the specification of this kind refractory brick is 230 * 230mm, SiO
2Content is up to 60%, because the high Si content of this kind has increased and NaAlSiO
4Corresponding high viscosity phase NaAlSi
3O
8Formation, refractory materials NaAlSi
3O
8The pressure of phase is to prolonging the cell life particularly advantageous.
Described special-shaped lateral mass 7 is sidepiece SiC composite S i
3 N
48 form with special-shaped charcoal piece 9 bondings of sidepiece.Sidepiece is 70mmSiC composite S i
3N
4The special-shaped lateral mass of charcoal piece, SiC composite S i
3N
4The charcoal piece has higher thermal conductivity and lower resistivity, can help the formation of sideways furnace wall, and compound special-shaped lateral mass on this, so, " slope " is more firm, because the electric current in the negative electrode has this delta-shaped region conduction of quite most of process, so the charcoal paste layer thickness of attenuate periphery, it is very helpful replacing elongated trilateral charcoal piece, helps especially to prolong bath life.
Claims (3)
1, a kind of lining structure of large-scale pre-baking aluminium electrolysis trough, it is characterized in that: described inner lining structure has been built asbestos flaggy (1) by laying bricks or stones from top to bottom successively in the electrolytic bath shell bottom, the thermal insulation layer (2) that high temperature resistant silicic acid calcium plate constitutes, the thermal insulation layer (3) that two-layer light cinder brick constitutes, the impervious barrier (4) that one deck aluminum oxide constitutes, the impervious barrier (5) that two-layer refractory brick constitutes, semi-graphite cathode composite Ti B
2Coating (6), sidepiece are special-shaped lateral mass (7).
2, lining structure of large-scale pre-baking aluminium electrolysis trough according to claim 1 is characterized in that: described semi-graphite cathode composite Ti B
2Coating (6) contains 30% graphite; Described refractory brick impervious barrier (5) contains 60% SiO
2
3, lining structure of large-scale pre-baking aluminium electrolysis trough according to claim 1 is characterized in that: described special-shaped lateral mass (7) is sidepiece SiC composite S i
3N
4(8) with special-shaped charcoal piece (9) be combined into of sidepiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710048985 CN101037775A (en) | 2007-04-25 | 2007-04-25 | Lining structure of large-scale pre-baking aluminium electrolysis trough |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710048985 CN101037775A (en) | 2007-04-25 | 2007-04-25 | Lining structure of large-scale pre-baking aluminium electrolysis trough |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101037775A true CN101037775A (en) | 2007-09-19 |
Family
ID=38888942
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710048985 Pending CN101037775A (en) | 2007-04-25 | 2007-04-25 | Lining structure of large-scale pre-baking aluminium electrolysis trough |
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|---|---|
| CN (1) | CN101037775A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984143A (en) * | 2010-12-04 | 2011-03-09 | 郑州大学 | External heated aluminum electrolytic cell |
| CN102234820A (en) * | 2011-08-04 | 2011-11-09 | 中国铝业股份有限公司 | Method for reducing horizontal current in molten aluminum of aluminum electrolysis bath |
| CN103952721A (en) * | 2014-04-21 | 2014-07-30 | 西安建筑科技大学 | Semi-coke base carbon anode for aluminum electrolysis and preparation method thereof |
| CN104937143A (en) * | 2012-10-25 | 2015-09-23 | 俄罗斯工程技术中心 | Method and apparatus for lining the cathode device of an electrolytic cell |
| CN105648474A (en) * | 2016-03-10 | 2016-06-08 | 河南中孚实业股份有限公司 | Energy-saved flow stabilization construction method of large prebaked tank |
| CN107709624A (en) * | 2015-09-10 | 2018-02-16 | 俄铝工程技术中心有限责任公司 | Liner for the cathode assembly of the reduction cell of aluminium production |
| CN113755895A (en) * | 2020-06-04 | 2021-12-07 | 沈阳铝镁设计研究院有限公司 | Electrolytic cell lining structure capable of reducing solid waste |
-
2007
- 2007-04-25 CN CN 200710048985 patent/CN101037775A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984143A (en) * | 2010-12-04 | 2011-03-09 | 郑州大学 | External heated aluminum electrolytic cell |
| CN101984143B (en) * | 2010-12-04 | 2012-04-25 | 郑州大学 | External heated aluminum electrolytic cell |
| CN102234820A (en) * | 2011-08-04 | 2011-11-09 | 中国铝业股份有限公司 | Method for reducing horizontal current in molten aluminum of aluminum electrolysis bath |
| CN102234820B (en) * | 2011-08-04 | 2013-03-20 | 中国铝业股份有限公司 | Method for reducing horizontal current in molten aluminum of aluminum electrolysis bath |
| CN104937143B (en) * | 2012-10-25 | 2017-06-16 | 俄铝工程技术中心有限责任公司 | The method and apparatus for installing liner additional for the negative electrode for electrolytic cell |
| CN104937143A (en) * | 2012-10-25 | 2015-09-23 | 俄罗斯工程技术中心 | Method and apparatus for lining the cathode device of an electrolytic cell |
| CN103952721B (en) * | 2014-04-21 | 2016-04-13 | 西安建筑科技大学 | A kind of blue charcoal base carbon anode used for aluminium electrolysis and preparation method thereof |
| CN103952721A (en) * | 2014-04-21 | 2014-07-30 | 西安建筑科技大学 | Semi-coke base carbon anode for aluminum electrolysis and preparation method thereof |
| CN107709624A (en) * | 2015-09-10 | 2018-02-16 | 俄铝工程技术中心有限责任公司 | Liner for the cathode assembly of the reduction cell of aluminium production |
| CN107709624B (en) * | 2015-09-10 | 2020-05-05 | 俄铝工程技术中心有限责任公司 | Lining of a cathode assembly for a reduction cell for aluminium production |
| CN105648474A (en) * | 2016-03-10 | 2016-06-08 | 河南中孚实业股份有限公司 | Energy-saved flow stabilization construction method of large prebaked tank |
| 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 |
| CN113755895A (en) * | 2020-06-04 | 2021-12-07 | 沈阳铝镁设计研究院有限公司 | Electrolytic cell lining structure capable of reducing solid waste |
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Open date: 20070919 |