CN85205776U - Tib2 composite layers-type cathode for ai electrolysis - Google Patents
Tib2 composite layers-type cathode for ai electrolysis Download PDFInfo
- Publication number
- CN85205776U CN85205776U CN 85205776 CN85205776U CN85205776U CN 85205776 U CN85205776 U CN 85205776U CN 85205776 CN85205776 CN 85205776 CN 85205776 U CN85205776 U CN 85205776U CN 85205776 U CN85205776 U CN 85205776U
- Authority
- CN
- China
- Prior art keywords
- type cathode
- cathode structure
- composite layer
- tib
- layer type
- 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.)
- Expired - Lifetime
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- 239000002131 composite material Substances 0.000 title claims abstract description 12
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000004411 aluminium Substances 0.000 claims abstract description 20
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- 150000001875 compounds Chemical class 0.000 claims abstract description 4
- 229910052796 boron Inorganic materials 0.000 claims abstract description 3
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 3
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract 2
- 239000004917 carbon fiber Substances 0.000 claims abstract 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 239000011230 binding agent Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 abstract description 26
- 239000007788 liquid Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 9
- 239000003575 carbonaceous material Substances 0.000 abstract description 2
- 238000000151 deposition Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002344 surface layer Substances 0.000 abstract 2
- 238000005530 etching Methods 0.000 abstract 1
- 238000005087 graphitization Methods 0.000 abstract 1
- 239000011734 sodium Substances 0.000 description 6
- 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 5
- 229910052708 sodium Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 2
- 229910033181 TiB2 Inorganic materials 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- -1 sodium aluminum fluoride Chemical compound 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- DNEHKUCSURWDGO-UHFFFAOYSA-N aluminum sodium Chemical compound [Na].[Al] DNEHKUCSURWDGO-UHFFFAOYSA-N 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000006193 liquid solution Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Electrolytic Production Of Metals (AREA)
Abstract
The utility model discloses Ti B-[2] composite layer type cathode structure for aluminium electrolysis. The Ti B-[2] composite layer type cathode structure is made of graphitization carbon materials, and a surface layer is a complete Ti B-[2] thin layer formed by deposition method. The surface layer is tightly bonded with a base body through a middle layer composed of compounds containing Ti, B, Al, C and Si and carbon fiber. The surface of the Ti B-[2] composite layer type cathode structure well moisten the aluminium liquid and has good resistivity toward etching by the aluminium liquid and natrum. The hydroelectric bath with the Ti B-[2] composite layer type cathode structure can reduce the cathode to 1.5 cm to 2.5 cm. The Ti B-[2] composite layer type cathode structure has the advantages of energy saving and low investment, the voltage is 4 to 1.0V, and the current efficiency can be improved to 92% to 95%. The manufacture process with the Ti B-[2] composite layer type cathode structure is convenient, and the amount of Ti B-[2] is small.
Description
The utility model relates to a kind of aluminum electrolyzation technology.Particularly a kind of cathode structure of aluminium cell.
Hall's technique is mostly used in aluminum current metallurgical industry, adopts sodium aluminum fluoride (Na
5AlF
6) fused salt is main flux, pass to direct current and reduce wherein dissolved aluminum oxide, and obtain liquid metal aluminium.The used negative electrode of this method is made of carbon materials, and aluminium liquid is moistening bad to this material, so have to keep the aluminium liquid of suitable thickness on negative electrode.Magnetic field force induced effect, aluminium liquid produce fluctuation and stir, and this not only can increase the aluminium loss, and will strengthen pole span, and the volts lost that consumes betwixt accounts for about 40% of groove total pressure drop.Usually find between aluminium liquid and the cathode block to accompany one deck ionogen, cause extra voltage loss thus, also can aggravate the infiltration of sodium anticathode carbon piece simultaneously, cause the negative electrode breakage.
TiB2 (TiB
2) very high chemical stability is arranged in high temperature aluminum liquid and electrolytic solution, good conductivity, and can be well moistening for aluminium liquid.Thereby extensively be recommended as a kind of comparatively ideal inert cathode material.United States Patent (USP) 4,231, open in 853 and 4,341,611: with TiB
2Plate is embedded on the carbon basal body with pin, and the formation negative electrode is stitched together.This method consumes TiB
2Material is more, and cost height, the particularly seam crossing of leaving at cathode surface are subject to aluminium liquid and sodium corrodes, and causes TiB
2Plate comes off and the negative electrode breakage.
The purpose of this utility model provides a kind of aluminum electrolyzing cell used TiB
2The composite layer cathode construction is in order to solve TiB
2Material consumption is many, cost height, and TiB
2Layer and the difficult problem that connects of carbon basal body.The utility model forms a complete TiB on negative electrode
2Tectum improves whole negative electrode to electrolyte solution, aluminium and sodium erosive resistivity, and then reduces the power consumption of electrolysis of aluminum.
Main points of the present utility model are: adopt multi-layer compound structure.The upper layer of this structure is the pure of electrodip process formation, the TiB of dense non-porous
2Layer.It is deposited on the middle close binder, forms a complete cathode surface.TiB
2Layer thickness can be determined according to the expected service life of electrolyzer, be generally 0.02-3mm.Middle close binder contains compound and the carbon fibre of Ti, B, Al, C, Si, wherein at least TiB should be arranged
2And Al
4C
3This layer be available to be smeared, vapour deposition, galvanic deposit, and various coating methods such as plasma and flame plating form, and it can avoid galvanic deposit TiB
2Difference between layer and the greying carbon element matrix on the thermal expansivity and the interlayer that produces ftractures.By the Chemical bond power in this middle layer and TiB
2Layer and greying carbon element matrix combine securely.Middle close binder also has stronger resistivity to the erosion of ionogen, aluminium liquid and sodium, and this layer thickness is 0.05-6mm.Greying carbon element matrix adopting is existing carbon pole preparation technology form, and cathode collector bar inserts wherein.The negative electrode working-surface becomes 2 °-90 ° pitch angle with horizontal plane, promptly negative electrode can be tilting or rectilinear.The electrolyzer of this cathode construction and corresponding grooved is housed, and still available sodium aluminum fluoride---aluminum oxide is main ionogen.But pole span can shorten to 1.5-2.5 centimetre by present 4-5 centimetre.The working-surface of anode and negative electrode is keeping parallelism mutually.Cathode current density is 0.5-1.5A/cm
2
The advantage of this composite layer cathode construction is: galvanic deposit TiB
2Layer can be well moistening for aluminium liquid, and the erosion of aluminium liquid and sodium is had stronger resistivity.Owing to form a complete cathode surface, improved resistance to corrosion and stability, and can improve the cathode current distribution situation.TiB
2Consumption is few, and manufacturing processed is simple and easy to do, has reduced and has built the groove investment.Can save bath voltage 0.4-1.0 volt, under the situation that reduces pole span, current efficiency can be brought up to 92-95% by present 86-89%.
The utility model will be further described below in conjunction with accompanying drawing.
Fig. 1 is the tilting electrolyzer synoptic diagram that the utility model cathode construction is housed.
Fig. 2 is the vertical board-like electrolyzer synoptic diagram that the utility model cathode construction is housed.
With reference to Fig. 1, go up the solid graphite carbon basal body (2) that useful existing carbon pole preparation technology forms at cell body (1), wherein insert cathode collector bar (3), at greying carbon element matrix and TiB
2Between the layer (4) is middle close binder (5).Its thickness is 0.1mm, and it contains TiB
2, TiC and Al
4C
3, adopt electro-deposition method to apply and form.The top layer is the TiB that electrodip process forms
2Layer (4), its thickness is 0.4mm.The negative electrode working-surface becomes 10 ° pitch angle with horizontal plane.Anode (6) working-surface and negative electrode working-surface are parallel to each other, and two interpole gaps are 2.0cm.Cathode current density is 0.9A/cm
2Be main ionogen (7) with sodium aluminum fluoride one aluminum oxide still, it consists of: molecular ratio 2.1-2.7,3-8%(weight) Al
2O
3, 3-7%(weight) and MgF
2, electrolysis temperature is 900-970 ℃.Only there is the very thin aluminium liquid (8) of one deck at cathode surface, the product aluminium that electrolysis goes out, taking advantage of a situation flows in the remittance aluminium pond (9).
With reference to Fig. 2, negative electrode is tabular, and whole surface is composite layer structure of the present utility model.TiB
2Layer (4), the material of middle close binder (5), formation method, thickness etc. are all described with accompanying drawing 1.Current conducting rod (3) inserts in the greying carbon element matrix (2).Anode (6) and negative electrode are all vertically laid, and become 90 ° of angles with horizontal plane.The two working-surface is parallel to each other, and all the other structures are described identical with accompanying drawing 1 with the electrolysis process condition.
Claims (4)
1, a kind of TiB that uses
2The aluminium electrolysis cathode structure that covers is characterized in that: by a complete galvanic deposit TiB
2Upper layer, the composite layer negative electrode that middle close binder and greying carbon element matrix constitute.
2, cathode construction as claimed in claim 1 is characterized in that: T
iB
2Layer thickness is 0.02-3mm, and middle close binder thickness is 0.05-6mm.
3, cathode construction as claimed in claim 1 or 2 is characterized in that: middle close binder is to be made of the compound of Ti, B, Al, C, Si and carbon fiber, wherein at least TiB should be arranged
2And Al
3C
4
4, cathode construction as claimed in claim 1 or 2 is characterized in that: the negative electrode working-surface becomes 2 °-90 ° pitch angle with horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85205776 CN85205776U (en) | 1985-12-31 | 1985-12-31 | Tib2 composite layers-type cathode for ai electrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85205776 CN85205776U (en) | 1985-12-31 | 1985-12-31 | Tib2 composite layers-type cathode for ai electrolysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85205776U true CN85205776U (en) | 1986-10-22 |
Family
ID=4800764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85205776 Expired - Lifetime CN85205776U (en) | 1985-12-31 | 1985-12-31 | Tib2 composite layers-type cathode for ai electrolysis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85205776U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091471C (en) * | 2000-05-08 | 2002-09-25 | 新化县碳素厂 | Carbon block as cathode with compound titanium boride-carbon layer and its preparing process |
| CN100366800C (en) * | 2004-12-28 | 2008-02-06 | 中国铝业股份有限公司 | Preparation method of TiB2 composite layer cathode carbon block |
| CN100465349C (en) * | 2005-12-26 | 2009-03-04 | 石忠宁 | Aluminium electrolysis cathode with titanium diboride coating and preparation process thereof |
| CN103069053A (en) * | 2010-07-29 | 2013-04-24 | 西格里碳素欧洲公司 | Process for producing a cathode block for an aluminium electrolysis cell and a cathode block |
| CN109319507A (en) * | 2018-09-25 | 2019-02-12 | 苏州大学 | Realize the device of magnetic liquid metal three-dimensional motion |
-
1985
- 1985-12-31 CN CN 85205776 patent/CN85205776U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091471C (en) * | 2000-05-08 | 2002-09-25 | 新化县碳素厂 | Carbon block as cathode with compound titanium boride-carbon layer and its preparing process |
| CN100366800C (en) * | 2004-12-28 | 2008-02-06 | 中国铝业股份有限公司 | Preparation method of TiB2 composite layer cathode carbon block |
| CN100465349C (en) * | 2005-12-26 | 2009-03-04 | 石忠宁 | Aluminium electrolysis cathode with titanium diboride coating and preparation process thereof |
| CN103069053A (en) * | 2010-07-29 | 2013-04-24 | 西格里碳素欧洲公司 | Process for producing a cathode block for an aluminium electrolysis cell and a cathode block |
| CN109319507A (en) * | 2018-09-25 | 2019-02-12 | 苏州大学 | Realize the device of magnetic liquid metal three-dimensional motion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |