CN101392390B - Special-shaped carbon block at side of electrobath - Google Patents
Special-shaped carbon block at side of electrobath Download PDFInfo
- Publication number
- CN101392390B CN101392390B CN2007100779491A CN200710077949A CN101392390B CN 101392390 B CN101392390 B CN 101392390B CN 2007100779491 A CN2007100779491 A CN 2007100779491A CN 200710077949 A CN200710077949 A CN 200710077949A CN 101392390 B CN101392390 B CN 101392390B
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- China
- Prior art keywords
- carbon block
- carbon piece
- hetero
- groove
- electrolytic tank
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 78
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000005868 electrolysis reaction Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000008439 repair process Effects 0.000 abstract description 2
- 230000000717 retained effect Effects 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 description 13
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 5
- 239000003610 charcoal Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 206010020880 Hypertrophy Diseases 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Electrolytic Production Of Metals (AREA)
Abstract
This invention discloses a lateral hetero-shaped carbon block of an electrolytic tank, which comprises an upper carbon block (1) and a lower carbon block (2). The section of the upper carbon block (1) is a rectangle and the side face of the lower carbon block is provided with an extending slope (3). The hetero-shaped carbon block is divided into an upper part and a lower part. The hetero-shaped carbon block is separated; if the upper carbon block is worn during the production process, the upper carbon block can be replaced through minor repair of the electrolytic tank and the lower carbon block can be retained, thereby lowering the production cost and saving the repairing time of the electrolytic tank. A groove is made on the lower carbon block and the upper carbon block is inserted into the groove to reduce the probability of leakage. Compared with the prior art, the hetero-shaped carbon block reduces the energy consumption effectively, further improves the operation stability of the aluminum electrolytic tank and optimizes the technical economic indexes of the aluminum electrolysis technology; the hetero-shaped carbon block also has the advantages of conserving energy, reducing emissions, prolonging the working time of the aluminum electrolytic tank and lowering the production cost.
Description
Technical field
The present invention relates to the cathode block that the electrolyzer sidepiece uses, particularly a kind of special-shaped carbon block at side of electrobath.
Background technology
Domestic large-scale pre-baked aluminum electrolysis cell adopts common sidewall carbon brick and " artificial stretching one's legs " usually, because " artificial the stretching one's legs " of common sidewall carbon brick is to prick admittedly attached to the allosome on the carbon piece by artificial with carbon paste, short texture, in roasting, start-up course, along with temperature raises, expose the even defective of " artificial stretching one's legs " density unevenness, be subjected to after the expansion after the thermal shocking cracky and artificial " stretching one's legs " under cold operation, to form stretching one's legs of hypertrophy, caused the defective of distribution of current inequality.Chinese patent 97212727.5 discloses a kind of aluminum electrolyzing cell used special-shaped lateral part carbon piece, its special-shaped lateral part carbon piece is a step carbon piece, the applicant discovers, the shortcoming of this product is influences such as the groove temperature fluctuation aborning of carbon piece, the aluminium liquid of upper step flows and washes away, galvanic corrosion, easy damaged leakage, be unfavorable for keeping the thermal equilibrium of electrolyzer, make the aluminium cell lost of life.And after the carbon piece of upper step damages, special-shaped lateral part carbon piece all can only be changed, waste morely, but also will stop groove electrolyzer is carried out large repairs, improved production cost.
Summary of the invention
The objective of the invention is to: a kind of longer service life is provided, is convenient to change, be beneficial to and keep electrolyzer thermal equilibrium, the special-shaped carbon block at side of electrobath of cracky not is to overcome the deficiencies in the prior art.
The present invention constitutes like this: it comprises top carbon piece 1 and bottom carbon piece 2, and the cross section of top carbon piece 1 is a rectangle, and the side of bottom carbon piece 2 is provided with the hypotenuse 3 of stretching one's legs.Be provided with groove 4 above bottom carbon piece 2, top carbon piece 1 inserts in the groove 4.The degree of depth of groove 4 is 3～10 centimetres.The degree of depth of groove 4 be 4～6 centimetres better.Top carbon piece 1 adopts the carbonitride of silicium material.
Special-shaped carbon block of the present invention is divided into up and down two portions, special-shaped carbon block is separated, if top carbon piece is aborning after the breakage, can top carbon piece be changed by the electrolyzer light maintenance, keep bottom carbon piece, reduced production cost, and saved the time of electrolyzer maintenance.The applicant discovers, during use, top carbon piece and bottom carbon piece are to use the carbon paste fixed, seepage may occur behind the intermediate gap life-time service,, on the carbon piece of bottom, produce groove in order to prevent seepage, top carbon piece is inserted in the groove, to reduce the chance of seepage, through applicant's test, the degree of depth of groove is that 4～6 centimetres of effects are better.Top carbon piece adopt the carbonitride of silicium material have good heat dissipation, non-conductive, electrochemically resistant learns corrosion and ionogen washes away strong advantage, in Aluminium Electrolysis, can effectively reduce energy consumption, further improved the stability of aluminium cell operation, optimize the aluminum electrolyzation technology economic target, can create conditions for energy-saving and emission-reduction and prolongation aluminium cell life-span.
The carbonitride of silicium material performance index that the present invention adopts is better than common charcoal piece, and data are as follows:
| Performance index | Unit | The charcoal silicon nitride | Common charcoal piece | |
| One-level | Secondary | |||
| Void content | ％ | 17.4 | 26 | 24 |
| Compressive strength | Mpa | 188.5 | 22 | 20 |
| Folding strength | Mpa | 29.4-39.2 | 3.44-6.20 | 3.44-6.20 |
| Volume density | G/cm3 | 2.62 | 1.55-1.65 | 1.55-1.65 |
| Thermal expansivity | 4.8 | 3.7 | 3.7 | |
| Thermal conductivity | W/m℃ | 23 | 17.2 | 17.2 |
| Compare resistance | Ωcm | ＞800 | ＜0.006 | ＜0.006 |
| Maximum surperficial use temperature in air | ℃ | 1760 | 500 | 500 |
| Oxidation-resistance | Good | Bad | Bad | |
| Potential resistance to electrolyte contamination corrodibility | Good | Bad | Bad | |
The advantage of carbonitride of silicium material technical indicator in the Aluminium Electrolysis process: carbonitride of silicium has good heat dissipation, non-conductive, electrochemically resistant learns corrosion and ionogen washes away advantages such as strong.1, carbonitride of silicium good heat dissipation, the aluminum cell side thermal conductivity is good, has strengthened the heat radiation of sidepiece, is convenient to form firm ionogen stove group; 2, carbonitride of silicium resistance is big, and conduction helps electric current vertically downward hardly, thereby reduces the sidepiece conduction of aluminium cell, reduces horizontal current; Also help the stable of aluminium cell flow field and magnetic field, make metal aluminium liquid and ionogen liquid layer keep comparatively stable status, create conditions for further optimizing Technology, thereby obtain better economic results; 3, because the carbonitride of silicium physical and chemical index is better than common charcoal piece, electrochemically resistant is learned corrosion and ionogen washes away by force, effectively reduces energy consumption, has further improved the stability of aluminium cell operation, optimize the aluminum electrolyzation technology economic target, can create conditions for energy-saving and emission-reduction and prolongation aluminium cell life-span.Therefore compare with prior art, the present invention has to be convenient to change, prolong the electric tank working time, improves electric tank working stability, the advantage that reduces production costs.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention;
Embodiment
Embodiments of the invention 1: make top carbon piece 1 and bottom carbon piece 2, the cross section of top carbon piece 1 is a rectangle, the hypotenuse 3 of stretching one's legs is produced in the side of bottom carbon piece 2, the cross section of bottom carbon piece 2 is similar to rectangle, produce as having the hypotenuse 3 of the shape of stretching one's legs now in the side of bottom carbon piece 2, see the shape of bottom carbon piece 2 from the cross section, promptly cut away a corner of rectangle top.In order to prevent that the slit between top carbon piece 1 and the bottom carbon piece 2 from leaking, above bottom carbon piece 2, produce groove 4, top carbon piece 1 to be inserted in the groove 4, the degree of depth of groove 4 is between 3～10 centimetres.Top carbon piece 1 can adopt the carbonitride of silicium material, aluminium liquid washing away, corroding top carbon piece 1 when reducing to produce.
Embodiments of the invention 2: make top carbon piece 1 and bottom carbon piece 2, the cross section of top carbon piece 1 is a rectangle, and the cross section of bottom carbon piece 2 is similar to rectangle, produces the hypotenuse 3 as the existing shape of stretching one's legs in the side of bottom carbon piece 2.Produce groove 4 above bottom carbon piece 2, top carbon piece 1 is inserted in the groove 4, the degree of depth of groove 4 is 5 centimetres.Top carbon piece 1 can adopt the carbonitride of silicium material, aluminium liquid washing away, corroding top carbon piece 1 when reducing to produce.
Claims (3)
1. special-shaped carbon block at side of electrobath, it is characterized in that: it comprises top carbon piece (1) and bottom carbon piece (2), and the cross section of top carbon piece (1) is a rectangle, and the side of bottom carbon piece (2) is provided with the hypotenuse of stretching one's legs (3); Be provided with groove (4) in bottom carbon piece (2) top, top carbon piece (1) inserts in the groove (4); The degree of depth of groove (4) is 3～10 centimetres.
2. special-shaped carbon block at side of electrobath according to claim 1 is characterized in that: the degree of depth of groove (4) is 4～6 centimetres.
3. special-shaped carbon block at side of electrobath according to claim 1 is characterized in that: top carbon piece (1) adopts the carbonitride of silicium material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100779491A CN101392390B (en) | 2007-09-19 | 2007-09-19 | Special-shaped carbon block at side of electrobath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100779491A CN101392390B (en) | 2007-09-19 | 2007-09-19 | Special-shaped carbon block at side of electrobath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101392390A CN101392390A (en) | 2009-03-25 |
| CN101392390B true CN101392390B (en) | 2010-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100779491A Active CN101392390B (en) | 2007-09-19 | 2007-09-19 | Special-shaped carbon block at side of electrobath |
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| Country | Link |
|---|---|
| CN (1) | CN101392390B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108048874A (en) * | 2017-12-29 | 2018-05-18 | 山西晋阳碳素有限公司 | Silicon nitride bonded silicon carbon block clad aluminum side wall carbon block |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4118304A (en) * | 1976-09-07 | 1978-10-03 | Mitsubishi Light Metal Industries Limited | Electrolytic alumina reduction cell with heat radiation reducing means |
| US4177128A (en) * | 1978-12-20 | 1979-12-04 | Ppg Industries, Inc. | Cathode element for use in aluminum reduction cell |
| US4421625A (en) * | 1981-05-20 | 1983-12-20 | Swiss Aluminum Ltd. | Lower part of a fused salt electrolytic cell |
-
2007
- 2007-09-19 CN CN2007100779491A patent/CN101392390B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4118304A (en) * | 1976-09-07 | 1978-10-03 | Mitsubishi Light Metal Industries Limited | Electrolytic alumina reduction cell with heat radiation reducing means |
| US4177128A (en) * | 1978-12-20 | 1979-12-04 | Ppg Industries, Inc. | Cathode element for use in aluminum reduction cell |
| US4421625A (en) * | 1981-05-20 | 1983-12-20 | Swiss Aluminum Ltd. | Lower part of a fused salt electrolytic cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101392390A (en) | 2009-03-25 |
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