CN201809455U - Sealing device for cover plate of aluminum electrolysis cell - Google Patents
Sealing device for cover plate of aluminum electrolysis cell Download PDFInfo
- Publication number
- CN201809455U CN201809455U CN2010205015157U CN201020501515U CN201809455U CN 201809455 U CN201809455 U CN 201809455U CN 2010205015157 U CN2010205015157 U CN 2010205015157U CN 201020501515 U CN201020501515 U CN 201020501515U CN 201809455 U CN201809455 U CN 201809455U
- Authority
- CN
- China
- Prior art keywords
- cover plate
- groove cover
- groove
- retaining
- electrolysis cell
- 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
Links
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 68
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000007789 sealing Methods 0.000 title claims abstract description 53
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 34
- 239000004411 aluminium Substances 0.000 claims description 55
- 238000009413 insulation Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 9
- 210000000038 chest Anatomy 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 4
- 239000010425 asbestos Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- KLZUFWVZNOTSEM-UHFFFAOYSA-K Aluminium flouride Chemical compound F[Al](F)F KLZUFWVZNOTSEM-UHFFFAOYSA-K 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910000754 Wrought iron Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000004673 fluoride salts Chemical class 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Abstract
The utility model relates to a sealing technology of a cover plate of an aluminum electrolysis cell, in particular to a sealing device for the cover plate of an aluminum electrolysis cell. The sealing device for the cover plate of the aluminum electrolysis cell comprises sealing strips of the cell cover plate, an upper stopping head of the cell cover plate, a lower stopping head of the cell cover, a U-shaped groove of an aluminum plate and an insulating U-shaped groove, wherein the sealing strips of the cell cover plate are arranged on the lateral surfaces of the cell cover plate at the front end and the rear end of the aluminum outlet end and the flue end of the electrolysis bath; and the upper stopping head and the lower stopping head of the cell cover plate are respectively arranged at the upper end head and the lower end head of the cell cover plate. The sealing device for the cover plate of the aluminum electrolysis cell has the benefits as follows: the service life and the maintenance period of the cell cover plate are prolonged, the expenditure of maintenance spare parts is reduced, the insulating performance of the cell cover plate is enhanced, the utilization rate of energy is reduced, the pollution to factory buildings and peripheral environment is reduced and the labor environment of workers is improved; and meanwhile, the recovery of harmful fluoride in flue gas can be improved and the production cost of raw aluminum liquid can be reduced.
Description
Technical field
The utility model relates to aluminium cell flue gas trapping packing technique, specifically relates to a kind of aluminium electrolysis cell cover plate for sealing device.
Background technology
At present, middle aluminium company has experienced the serious impact of international financial crisis, and enterprise is faced with unprecedented difficulty.In the critical period of enterprise reform development, control net income increase thanks to, structural adjustment, actively take energy-saving and emission-reduction, the various measures of cost efficiency, it is the important behave of the current severe economic situation of reply, simultaneously, current electrolysis aluminium price presses on towards cost, and is energy-saving and cost-reducing significant.260 total electrolyzers of Qinghai Branch second electrolysis plant, the groove cover plate of this series electrolyzer is used asbestos plate at present as insulating material, the groove cover plate is in use fragile, asbestos material easily comes off, cause failure of insulation, cause the energy loss between electrolytic bath cover plate and pot shell, and (the going up the retaining head) of groove cover plate directly retaining head and very easily damage of (keeping off head down) curved retaining head, maintenance rate height.In addition, often the slit is bigger between the groove cover plate of electrolyzer aluminium inlet and flue end and three angle cover plates, and sealing effectiveness is relatively poor, causes the dissipation everywhere of a large amount of flue gases, and flue gas trapping efficient is lower.Thereby caused factory building and surrounding enviroment to pollute, the worker laboring environment is poor, and is unfavorable for the recovery of harmful fluorochemical in the flue gas.Not only make the maintenance rate of the upper and lower shelves head of groove cover plate raise, increase groove cover plate maintenance cost, cause certain energy loss simultaneously, and fluorine content reduces in the aluminum oxide to make carrying that electrolysis flue gas purify to reclaim, and increases the consumption of primary aluminum fluoride salt in rain and makes the primary aluminum manufacturing cost.
Summary of the invention
The technical problems to be solved in the utility model is the deficiency that exists at prior art, provides a kind of resistance to air loss to the aluminium electrolysis cell cover plate to undergo technological transformation, and improves the aluminium electrolysis cell cover plate for sealing device of electrolytic bath cover plate for sealing performance.
A kind of aluminium electrolysis cell cover plate for sealing of the utility model device is achieved by following technical proposals: a kind of aluminium electrolysis cell cover plate for sealing of the utility model device comprises anode, anode rod, the level cover, the groove cover plate is the retaining head down, keep off head on the groove cover plate, the groove cover plate, groove cover plate for sealing bar, gas collection hole, gas skirt, crust breaking cylinder, the crust breaking hammer stem, anode large bus bar, stove group, groove thorax sidewall, cathode carbon pieces, cathode steel bar, three angle cover plates, bassinet stand, table, pot shell, aluminium sheet U type groove, bolt, a last retaining insulcrete, a following retaining aluminium sheet, insulation thimble, insulation U type groove, described aluminium electrolysis cell cover plate for sealing device comprises retaining head under the groove cover plate, keep off head on the groove cover plate, the groove cover plate, groove cover plate for sealing bar, described groove cover plate for sealing bar is arranged on the electrolyzer aluminium inlet, the groove cover plate side of flue end front and back end, the groove cover plate is the retaining head down, the retaining head is separately positioned on the following of groove cover plate on the groove cover plate, upper end, described sealed strip is installed in the side of groove cover plate.
A kind of aluminium electrolysis cell cover plate for sealing of the utility model device has following beneficial effect compared with prior art: the utility model has improved the sealing property of electrolytic bath cover plate, has improved flue gas trapping efficient, has improved the worker laboring environment; The utility model has strengthened the insulating property of electrolytic bath cover plate, has reduced electric energy by connecting the energy loss that electricity causes between groove cover plate and the pot shell, has improved the capacity usage ratio in the Aluminium Electrolysis; The utility model has prolonged under the electrolytic bath cover plate, the work-ing life and the maintenance cycle of lower gear head, has saved maintenance cost.
The upper and lower insulation of the utility model electrolytic bath cover plate for sealing device shelves head has high temperature resistant, high strength, high weather-proof, high dielectric, heavy anti-corrosion insulation material by application, strengthen the insulativity and the intensity of electrolytic bath cover plate, reduce the energy loss between groove cover plate maintenance rate and pot superstructure and pot shell.Simultaneously, use the high-temperature insulation groove, can effectively solve the charged phenomenon of groove cover plate, saves energy reduces the Aluminum Electrolysis Production cost.High-temperature insulation material is to adopt vanguard technology, pass through strongthener, compound other temperature-resistant materials, process through pultrusion, mold pressing,, high strength high temperature resistant, high weather-proof, high dielectric, the heavy advantage such as anticorrosion, also have energy-saving and environmental protection, easy for installation, the characteristics that need not to keep in repair except that having.Adopt the groove cover plate of this material fabrication and installation to be applied on the electrolyzer, can reduce bath voltage 10mv, from the level cover to groove along plate almost no current pass through, preferably resolve the electrolytic bath cover and make the situation of idle work, improve current efficiency and can play good action reducing bath voltage by bypass conduction.
The sealed strip that the thick aluminium sheet of the length 5mm corresponding with the groove cover plate is made is installed in the side of the utility model electrolytic bath cover plate for sealing device last piece groove cover plate of groove cover panel end before and after electrolyzer aluminium inlet, flue end, after end trough cover plate lid is put, engage tightly seamlessly with three angle cover plates, in addition, keeping off head under retaining head and the groove cover plate on the groove cover plate combines closely with the electrolysis ledge, reach the high-seal effect, improve the effect of flue gas trapping efficient.
The utility model electrolytic bath cover plate for sealing device, adopt the upper and lower shelves of insulating part head, make and not only formed good sealing between groove cover plate and table, the level cover, and the insulating property of groove cover plate have been improved, reached saves energy, improve the electrolyzer resistance to air loss, increase harmful fluorochemical recovery in flue gas trapping efficient and the flue gas, utilize, reduce primary aluminum and produce the purpose that fluoride salt consumes.
The utility model has been installed the fire proof seal frame on the square box around pot superstructure gas skirt and the crust breaking hammer stem, play the fixedly effect of the interior refractory brick of flameproof enclosure.A kind of electrolyzer flue gas of the utility model tightness system has played the minimizing factory building and surrounding enviroment are polluted, and improves worker laboring environment's beneficial effect, has improved the recovery of harmful fluorochemical in the flue gas simultaneously, reduces primary aluminum liquid production cost.
Description of drawings
A kind of aluminium cell flue gas of the utility model tightness system has following accompanying drawing:
Fig. 1 is a kind of aluminium electrolysis cell cover plate for sealing of the utility model device aluminum cell structure synoptic diagram;
Fig. 2 is a kind of aluminium electrolysis cell cover plate for sealing of the utility model device groove covering plate structure synoptic diagram;
Fig. 3 is a kind of aluminium electrolysis cell cover plate for sealing of the utility model device groove cover plate header structure synoptic diagram that performs;
Fig. 4 performs header structure A to synoptic diagram for a kind of aluminium electrolysis cell cover plate for sealing of the utility model device groove cover plate;
Fig. 5 is a kind of aluminium electrolysis cell cover plate for sealing of the utility model device groove cover plate lower gear header structure synoptic diagram;
Fig. 6 is that a kind of aluminium electrolysis cell cover plate for sealing of the utility model device groove cover plate lower gear header structure A is to synoptic diagram.
Wherein: 1, anode; 2, anode rod; 3, level cover; 4, groove cover plate lower gear head; 5, the groove cover plate head that performs; 6, groove cover plate; 7, groove cover plate for sealing bar; 8, gas collection hole; 9, gas skirt; 10, crust breaking cylinder; 11, crust breaking hammer stem; 12, anode large bus bar; 13, stove group; 14, groove thorax sidewall; 15, cathode carbon pieces; 16, anode rod iron; 17, three angle cover plates; 18, bassinet stand; 19, table; 20, pot shell; 21, aluminium sheet U type groove; 22, bolt; 23, go up a retaining insulcrete; 24, keep off an aluminium sheet down; 25, insulation thimble; 26, insulation U type groove.
Embodiment
Below in conjunction with drawings and Examples a kind of aluminium cell flue gas of the utility model tightness system technical scheme is further described.
As Fig. 1-shown in Figure 6, a kind of aluminium electrolysis cell cover plate for sealing of the utility model device comprises anode 1, anode rod 2, level cover 3, the groove cover plate is retaining 4 down, retaining 5 on the groove cover plate, groove cover plate 6, groove cover plate for sealing bar 7, gas collection hole 8, gas skirt 9, crust breaking cylinder 10, crust breaking hammer stem 11, anode large bus bar 12, stove group 13, groove thorax sidewall 14, cathode carbon pieces 15, cathode steel bar 16, three angle cover plates 17, bassinet stand 18, table 19, pot shell 20, aluminium sheet U type groove 21, bolt 22, a last retaining insulcrete 23, a following retaining aluminium sheet 24, insulation thimble 25, insulation U type groove 26, described aluminium electrolysis cell cover plate for sealing device comprises under the groove cover plate retaining 4, retaining 5 on the groove cover plate, groove cover plate 6, groove cover plate for sealing bar 7, described groove cover plate for sealing bar 7 is arranged on the electrolyzer aluminium inlet, the groove cover plate side of flue end front and back end, the groove cover plate is retaining 4 down, retaining 5 is separately positioned on the following of groove cover plate 6 on the groove cover plate, upper end, described sealed strip 7 is installed in the side of groove cover plate 6.
Described groove cover plate for sealing bar 7 adopts the thick aluminium sheet of 5mm to make, and is installed at the side of groove cover plate 6, and its length is consistent with groove cover plate 6 length, width 15cm.
Described groove cover plate down retaining 4 adopts aluminium sheet to make it and is of a size of 680 * 140 * 8mm for curved retaining header structure, and a curved shelves brilliance degree is 137 degree, and insulation U type groove 26 adopts the resin glass filamentary materials to make it and is of a size of 680 * 150 * 6mm.As Fig. 2, shown in Figure 6.
Retaining 5 be straight plate retaining header structure on the described groove cover plate, and directly keeping off its material of an insulcrete is phenolic board, is of a size of 680 * 140 * 10mm, and aluminium sheet U type groove 21 is of a size of 330 * 150 * 5mm.As Fig. 2, shown in Figure 4.
Adopt M6 * 40 bolts, 22 chuckings to fixedly connected between groove cover plate 6 and groove cover plate for sealing bar 7, the upper and lower shelves head.
Embodiment 1.
Groove cover plate for sealing bar 7 described in the utility model is arranged on the groove cover plate side of electrolyzer aluminium inlet, flue end front and back end, the groove cover plate down on retaining 4, the groove cover plate retaining 5 be separately positioned on the upper and lower termination of groove cover plate 6.
In the side of groove cover plate 6 sealed strip 7 is installed, groove cover plate 6 upsides are installed on the groove cover plate retaining 5, and groove cover plate 6 downsides are installed a groove cover plate play retaining 4, play strengthening groove cover plate insulating property and intensity, the effect of raising groove cover plate for sealing effect; Groove cover plate for sealing bar 7 adopts the thick aluminium sheet of 5mm to make, and is installed at the side of groove cover plate, and its length is consistent with groove cover plate length, width 15cm; Groove cover plate down retaining 4 is a curved shelves header structure, adopt aluminium sheet to make it and be of a size of 680 * 140 * 8mm, the groove cover plate down retaining 4 promptly down a retaining aluminium sheet 24 be a curved shelves head, its angle is 137 degree, insulation U type groove 26 adopts the resin glass filamentary material to make it and is of a size of 680 * 150 * 6mm, the groove cover plate down retaining 4 promptly down a retaining aluminium sheet 24 adopt bolts 22 to be connected with groove cover plate 6, bolt 22 puts insulation thimble 25 when passing the U type mouth of the U type groove 26 that insulate, insulate guaranteeing; Retaining 5 be straight plate shelves header structure on the groove cover plate, and retaining 5 is promptly gone up a retaining insulcrete 23 for straight retaining its material is a phenolic board on the groove cover plate, is of a size of 680 * 140 * 10mm, and aluminium sheet U type groove 21 is of a size of 330 * 150 * 5mm; Adopt M6 * 40 bolts, 22 chuckings to fixedly connected between groove cover plate 6 and groove cover plate for sealing bar 7 and the upper and lower shelves head.
In electrolyzer production use, according to gradient about the space between electrolyzer table, the level cover, the groove cover plate of groove cover plate 6 need only be performed 5 promptly straight retaining header structures up near level covers, and the promptly curved retaining header structure of groove cover plate lower gear head 4 is taken down and is placed on the table lid and puts and get final product.In addition, the groove cover plate 6 that adds sealed strip covered respectively be placed on electrolyzer flue end, a groove cover plate of aluminium inlet least significant end position, form tight contact seal with three angle cover plates and get final product.
Claims (5)
1. aluminium electrolysis cell cover plate for sealing device, comprise anode (1), anode rod (2), level cover (3), the groove cover plate is retaining head (4) down, retaining head (5) on the groove cover plate, groove cover plate (6), groove cover plate for sealing bar (7), gas collection hole (8), gas skirt (9), crust breaking cylinder (10), crust breaking hammer stem (11), anode large bus bar (12), stove group (13), groove thorax sidewall (14), cathode carbon pieces (15), cathode steel bar (16), three angle cover plates (17), bassinet stand (18), table (19), pot shell (20), aluminium sheet U type groove (21), bolt (22), a last retaining insulcrete (23), a following retaining aluminium sheet (24), insulation thimble (25), insulation U type groove (26), it is characterized in that: described aluminium electrolysis cell cover plate for sealing device comprises retaining head (4) under the groove cover plate, retaining head (5) on the groove cover plate, groove cover plate (6), groove cover plate for sealing bar (7), described groove cover plate for sealing bar (7) is arranged on the electrolyzer aluminium inlet, the groove cover plate side of flue end front and back end, the groove cover plate is retaining head (4) down, retaining head (5) is separately positioned on the following of groove cover plate (6) on the groove cover plate, upper end, described sealed strip (7) is installed in the side of groove cover plate (6).
2. aluminium electrolysis cell cover plate for sealing device according to claim 1 is characterized in that: described groove cover plate for sealing bar (7) adopts the thick aluminium sheet of 5mm to make, and is installed at the side of groove cover plate (6), and its length is consistent with groove cover plate (6) length, width 15cm.
3. aluminium electrolysis cell cover plate for sealing device according to claim 1, it is characterized in that: described groove cover plate retaining head (4) down is curved shelves header structure, adopt aluminium sheet to make it and be of a size of 680 * 140 * 8mm, curved shelves brilliance degree is 137 degree, and insulation U type groove (26) adopts the resin glass filamentary material to make it and is of a size of 680 * 150 * 6mm.
4. aluminium electrolysis cell cover plate for sealing device according to claim 1, it is characterized in that: retaining head (5) is straight plate shelves header structure on the described groove cover plate, straight its material of a retaining insulcrete is a phenolic board, is of a size of 680 * 140 * 10mm, and aluminium sheet U type groove (21) is of a size of 330 * 150 * 5mm.
5. aluminium electrolysis cell cover plate for sealing device according to claim 1 is characterized in that: adopt M6 * 40 bolts (22) chucking to fixedly connected between groove cover plate (6) and groove cover plate for sealing bar (7), the upper and lower shelves head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205015157U CN201809455U (en) | 2010-08-18 | 2010-08-18 | Sealing device for cover plate of aluminum electrolysis cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205015157U CN201809455U (en) | 2010-08-18 | 2010-08-18 | Sealing device for cover plate of aluminum electrolysis cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201809455U true CN201809455U (en) | 2011-04-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205015157U Expired - Lifetime CN201809455U (en) | 2010-08-18 | 2010-08-18 | Sealing device for cover plate of aluminum electrolysis cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201809455U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668330A (en) * | 2012-09-03 | 2014-03-26 | 沈阳铝镁设计研究院有限公司 | Connecting device of aluminum electrolytic cell and portal upright post |
| CN104726897A (en) * | 2015-03-06 | 2015-06-24 | 云南云铝涌鑫铝业有限公司 | Electrolytic tank system |
| CN106757158A (en) * | 2016-11-23 | 2017-05-31 | 中国铝业股份有限公司 | A kind of plication aluminium electrolysis cell cover plate |
| CN107532318A (en) * | 2014-12-29 | 2018-01-02 | 俄铝工程技术中心有限责任公司 | For the groove lid for the electrolytic cell for producing aluminium |
-
2010
- 2010-08-18 CN CN2010205015157U patent/CN201809455U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668330A (en) * | 2012-09-03 | 2014-03-26 | 沈阳铝镁设计研究院有限公司 | Connecting device of aluminum electrolytic cell and portal upright post |
| CN103668330B (en) * | 2012-09-03 | 2016-06-22 | 沈阳铝镁设计研究院有限公司 | The connecting device of aluminum cell casing and portal upright post |
| CN107532318A (en) * | 2014-12-29 | 2018-01-02 | 俄铝工程技术中心有限责任公司 | For the groove lid for the electrolytic cell for producing aluminium |
| CN104726897A (en) * | 2015-03-06 | 2015-06-24 | 云南云铝涌鑫铝业有限公司 | Electrolytic tank system |
| CN104726897B (en) * | 2015-03-06 | 2018-01-02 | 云南云铝涌鑫铝业有限公司 | Electrolyzer system |
| CN106757158A (en) * | 2016-11-23 | 2017-05-31 | 中国铝业股份有限公司 | A kind of plication aluminium electrolysis cell cover plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |
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| CX01 | Expiry of patent term |