CN1651610A - Welding method for major repairing cathode of large aluminium electrolytic bath - Google Patents
Welding method for major repairing cathode of large aluminium electrolytic bath Download PDFInfo
- Publication number
- CN1651610A CN1651610A CN 200410100968 CN200410100968A CN1651610A CN 1651610 A CN1651610 A CN 1651610A CN 200410100968 CN200410100968 CN 200410100968 CN 200410100968 A CN200410100968 A CN 200410100968A CN 1651610 A CN1651610 A CN 1651610A
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- cathode
- electrolyzer
- steel bar
- welding
- electrolytic bath
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- 238000003466 welding Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 22
- 239000004411 aluminium Substances 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 46
- 239000010959 steel Substances 0.000 claims abstract description 46
- 238000012423 maintenance Methods 0.000 claims description 10
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 230000008439 repair process Effects 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000009499 grossing Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000005868 electrolysis reaction Methods 0.000 description 7
- 238000002788 crimping Methods 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
Abstract
A welding method for repairing the cathode of large aluminium electrolyzer used to produce aluminium by electrolyzing includes cutting off the steel rod as cathode outside the position between internal surface of electrolyzer and cathode block, respectively repairing and smoothing the fractured surfaces, moving an electrically conductive connection plate with segment of steel rod in the internal cavity of electrolyzer for shielding magnetic field, convertional build-up welding, moving it out of the electrolyzer, matchying both fractured surfaces of steel rod, and butt welding.
Description
Technical field
The welding process of major repairing cathode of large aluminium electrolytic bath relates to a kind of overhaul method that is used for the large-sized prebaked cell for aluminum-reduction negative electrode of Aluminium Electrolysis.
Background technology
At present, in the Aluminum Electrolysis Production process, adopt the maintenance large-sized prebaked cell for aluminum-reduction that has a power failure usually.When stopping groove cleaning negative electrode, connection piece is cut off from cathode steel bar and aluminium-steel blast welding block on the cathode carbon pieces, if aluminium-steel blast welding block damages, also it to be cut off from soft being with of negative electrode aluminium that links to each other with negative busbar, under situation about having a power failure, weld the new aluminium of lastblock-steel blast welding block, and then couple together with the method for welding with connection piece cathode steel bar and aluminium-steel blast welding block.Being connected with in the termination of cathode steel bar of its cathode steel bar forms and adopts two kinds of methods of negative electrode square steel crimping with the connection steel plate is piecemeal with aluminium-steel blast welding block built-up welding.In electrolytic cell overhaul in the past, because electrolytic strength of current is not high, the magneticstrength in the factory building is little, and the method that the connection of its cathode steel bar is all taked to weld is carried out.Because Aluminium Electrolysis is to developing in type electrolyzer direction, along with the progressively operation of 280kA, 300KA and 350KA large-sized prebaked cell for aluminum-reduction, the ratio of the production capacity of large-scale groove in aluminium production significantly improves.But along with the continuous increase of electrolytic cell currents intensity, the difficulty of bringing for the electrolytic cell overhaul of electrolysis aluminum production enterprises is also increasing.Along with improving constantly of electrolytic cell currents magnitude, magneticstrength in the cell room constantly increases, adopt electric-arc welding commonly used to be connected to a fatal weakness, be exactly under certain magneticstrength, to be difficult for welding, even burn-on reluctantly, also may be rosin joint, can not guarantee that welding quality can not guarantee welding strength again.Therefore, the large-sized prebaked cell for aluminum-reduction of current electrolysis aluminium manufacturing enterprise is when carrying out electrolytic cell overhaul, the welding of anticathode rod iron is not to take whole electrolysis production series to be carried out repeatedly load down or power failure is welded in when welding, takes negative electrode square steel compression bonding method exactly.A kind of method was both brought the certain economic loss to electrolysis aluminum production enterprises before adopting, and brought many hidden danger for again the steady running and the safety and production of electrolyzer; And when adopting a kind of method in back, because of crimping resistance will be higher than welding resistance, As time goes on, crimping resistance may constantly increase, thereby causes power consumption to increase.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists for above-mentioned prior art, providing a kind of can make under the whole serial ordinary production situation of large-sized prebaked cell for aluminum-reduction, arbitrary electrolyzer in the series carried out large repairs, produce that series does not have a power failure or the situation of few load down under, the overhaul method of large-sized prebaked cell for aluminum-reduction.
The objective of the invention is to be achieved through the following technical solutions.
The welding process of major repairing cathode of large aluminium electrolytic bath, it is characterized in that after stopping groove cleaning negative electrode, cathode steel bar is cut off at the position of cathode steel bar between electrolyzer inwall and cathode block, respectively to fracture place under repair, leveling, deburring, to be associated with the whole electrolyzer inner chamber that moves into of conductive connection plates of one section rod iron again, carry out moving on to electrolyzer again behind the conventional maintenance operation and reset outward, the butt joint that coincide of two fracture faces of cathode steel bar is welded and finishes maintenance service.
Method of the present invention is characterized in that when the negative electrode casting mold, and cathode steel bar reserves and cuts off by the required length of rod iron fracture loss.
Method of the present invention, owing to adopt the method that cathode steel is blocked, the maintenance that connects steel plate is moved in the electrolyzer, because box hat has shielding effect to magnetic field, utilize the steel construction pot shell of electrolyzer that there is this principle of shielding effect in magnetic field, the welding of cathode steel bar moves to electrolyzer inside by the electrolyzer outside and welds during electrolytic cell overhaul, and the welding of cathode steel bar is moved in the electrolyzer that can weld after the shielding by unweldable high-intensity magnetic field and carries out during just electrolytic cell overhaul.When large-sized prebaked cell for aluminum-reduction stops groove cleaning negative electrode, in electrolyzer, cathode steel bar is cut off, and repair incision position neat by certain shape.When the negative electrode casting mold, reserve cathode steel bar by required length, to repair incision position neatly by certain shape equally, under situation about not having a power failure, cathode steel bar is coupled together then with connecting the built-up welding of steel plate a slice a slice.
Method of the present invention has been avoided the maintenance because an electrolytic cell overhaul has a power failure, and influences a series of electrolyzer productions, causes series to have a power failure, and can guarantee the electrolyzer smooth running, enhances productivity.
Description of drawings
Fig. 1 is the cathode steel bar welding position synoptic diagram of the welding process of major repairing cathode of large aluminium electrolytic bath of the present invention.
Specific implementation
Further describe as follows below in conjunction with accompanying drawing to method of the present invention.
The welding process of major repairing cathode of large aluminium electrolytic bath, in the maintenance process, after stopping groove cleaning negative electrode, at first will outside the position of cathode steel bar between electrolyzer inwall and cathode block cathode steel bar be cut off, respectively to the fracture place under repair, leveling, deburring, to be connected with the whole electrolyzer inner chamber that moves into of conductive connection plates of one section rod iron again, carry out conventional connection steel plate built-up welding operation again, cut off aluminium-steel blast welding block, and the soft band of negative electrode aluminium is cut off from negative busbar, burn-on again new aluminium-steel blast welding block and the soft band of negative electrode aluminium, use connection piece cathode steel bar and aluminium-steel blast welding block to couple together at last with the method for welding, after the welding it is moved on to outside the electrolyzer, the identical butt joint of two sections of cathode steel is welded finish maintenance service.1 is cathode carbon pieces among Fig. 1,2. electrolyzer pot shell, 3. connection piece, 4. cathode steel bar, 5. aluminium-steel blast welding block, 6. negative busbar, 7. soft band of negative electrode aluminium.
Adopt large-sized prebaked cell for aluminum-reduction overhaul of the present invention when stopping groove cleaning negative electrode, cut off at electrolyzer pot shell 2 inner cathode rod irons 4.During welding, utilize the shielding in 2 pairs of magnetic fields of steel tank shell, under situation about not having a power failure, cathode steel bar 4 is coupled together and reach the overhaul purpose with connection piece 3.Adopt method of the present invention, during the overhaul electrolyzer, under the situation that need not have a power failure, the rosin joint phenomenon do not occur, the weld volts lost meets the production standard requirement.
Claims (2)
1. the welding process of major repairing cathode of large aluminium electrolytic bath, it is characterized in that after stopping groove cleaning negative electrode, cathode steel bar is cut off at the position of cathode steel bar between electrolyzer inwall and cathode block, respectively to fracture place under repair, leveling, deburring, to be associated with the whole electrolyzer inner chamber that moves into of conductive connection plates of one section rod iron again, carry out conventional maintenance operation, move on to electrolyzer after the maintenance again and reset outward, the identical butt joint of two fracture faces of cathode steel bar is welded finish maintenance service.
2. the welding process of major repairing cathode of large aluminium electrolytic bath according to claim 1 is characterized in that when the negative electrode casting mold, and cathode steel bar reserves and cuts off by the required length of rod iron fracture loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101009688A CN1328414C (en) | 2004-12-28 | 2004-12-28 | Welding method for major repairing cathode of large aluminium electrolytic bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101009688A CN1328414C (en) | 2004-12-28 | 2004-12-28 | Welding method for major repairing cathode of large aluminium electrolytic bath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1651610A true CN1651610A (en) | 2005-08-10 |
| CN1328414C CN1328414C (en) | 2007-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101009688A Active CN1328414C (en) | 2004-12-28 | 2004-12-28 | Welding method for major repairing cathode of large aluminium electrolytic bath |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1328414C (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008000151A1 (en) * | 2006-06-20 | 2008-01-03 | China Aluminum International Engineering Corporation Limited | Isolating method for connecting rails between electrolysis plant and repairing plant |
| CN100404727C (en) * | 2005-08-30 | 2008-07-23 | 河南中孚实业股份有限公司 | Method for randomly large scale repair and welding electrolytic bath under no cut-off condition of aluminium electrolytic series |
| CN100432298C (en) * | 2005-11-02 | 2008-11-12 | 中国铝业股份有限公司 | Method for reducing voltage drop of aluminum cell stop |
| CN100523308C (en) * | 2005-11-02 | 2009-08-05 | 中国铝业股份有限公司 | Method for thermite welding aluminium electrolytic cell cathode steel bar |
| CN101397679B (en) * | 2007-09-28 | 2010-08-18 | 中国铝业股份有限公司 | Minor maintenance judgment method for electrolyzer |
| CN102409362A (en) * | 2011-12-26 | 2012-04-11 | 贵阳铝镁设计研究院有限公司 | Aluminium electrolysis cell through-current body hot-line welding control system |
| CN102806425A (en) * | 2012-08-22 | 2012-12-05 | 黄河鑫业有限公司 | Method for welding cathode flexible bus of aluminum electrolysis cell without series power failure |
| CN103320816A (en) * | 2013-05-30 | 2013-09-25 | 青铜峡铝业股份有限公司 | Method for connecting aluminum electrolytic tank cathode steel bar and connector presser |
| CN103510111A (en) * | 2012-06-21 | 2014-01-15 | 贵阳铝镁设计研究院有限公司 | Electrolytic bath cathode steel bar connecting plate structure |
| CN103506744A (en) * | 2012-06-21 | 2014-01-15 | 贵阳铝镁设计研究院有限公司 | Magnetic shielding method for electric arc welding in high-intensity magnetic field of aluminum reduction cell |
| CN104972220A (en) * | 2015-07-29 | 2015-10-14 | 武汉大学 | In-situ power-cut-free welding method for soft mother belts and aluminum bus of cathode of aluminum electrolysis cell |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2112082C1 (en) * | 1996-09-24 | 1998-05-27 | Акционерное общество открытого типа "Всероссийский алюминиево-магниевый институт" | Cathode shell of aluminum electrolyzer |
| RU2155824C1 (en) * | 1999-03-15 | 2000-09-10 | Оао "Суал" | Cathode enclosure of aluminum electrolizer |
| CN2615149Y (en) * | 2003-03-24 | 2004-05-12 | 杜荣华 | Cathode steel bar and bus connector of aluminium cell |
| CN2615148Y (en) * | 2003-04-18 | 2004-05-12 | 杜荣华 | Aluminium electrolytic cell crimp connector between cathode steel bar and cathode soft strip |
-
2004
- 2004-12-28 CN CNB2004101009688A patent/CN1328414C/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404727C (en) * | 2005-08-30 | 2008-07-23 | 河南中孚实业股份有限公司 | Method for randomly large scale repair and welding electrolytic bath under no cut-off condition of aluminium electrolytic series |
| CN100432298C (en) * | 2005-11-02 | 2008-11-12 | 中国铝业股份有限公司 | Method for reducing voltage drop of aluminum cell stop |
| CN100523308C (en) * | 2005-11-02 | 2009-08-05 | 中国铝业股份有限公司 | Method for thermite welding aluminium electrolytic cell cathode steel bar |
| WO2008000151A1 (en) * | 2006-06-20 | 2008-01-03 | China Aluminum International Engineering Corporation Limited | Isolating method for connecting rails between electrolysis plant and repairing plant |
| CN101397679B (en) * | 2007-09-28 | 2010-08-18 | 中国铝业股份有限公司 | Minor maintenance judgment method for electrolyzer |
| CN102409362A (en) * | 2011-12-26 | 2012-04-11 | 贵阳铝镁设计研究院有限公司 | Aluminium electrolysis cell through-current body hot-line welding control system |
| CN102409362B (en) * | 2011-12-26 | 2015-11-18 | 贵阳铝镁设计研究院有限公司 | Aluminium cell is through-flow body do not have a power failure welding control system |
| CN103506744A (en) * | 2012-06-21 | 2014-01-15 | 贵阳铝镁设计研究院有限公司 | Magnetic shielding method for electric arc welding in high-intensity magnetic field of aluminum reduction cell |
| CN103510111A (en) * | 2012-06-21 | 2014-01-15 | 贵阳铝镁设计研究院有限公司 | Electrolytic bath cathode steel bar connecting plate structure |
| CN102806425B (en) * | 2012-08-22 | 2014-07-16 | 黄河鑫业有限公司 | Method for welding cathode flexible bus of aluminum electrolysis cell without series power failure |
| CN102806425A (en) * | 2012-08-22 | 2012-12-05 | 黄河鑫业有限公司 | Method for welding cathode flexible bus of aluminum electrolysis cell without series power failure |
| CN103320816A (en) * | 2013-05-30 | 2013-09-25 | 青铜峡铝业股份有限公司 | Method for connecting aluminum electrolytic tank cathode steel bar and connector presser |
| CN103320816B (en) * | 2013-05-30 | 2016-05-25 | 青铜峡铝业股份有限公司 | Method of attachment between a kind of aluminum cell cathode steel bar and connector presser |
| CN104972220A (en) * | 2015-07-29 | 2015-10-14 | 武汉大学 | In-situ power-cut-free welding method for soft mother belts and aluminum bus of cathode of aluminum electrolysis cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1328414C (en) | 2007-07-25 |
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| SE01 | Entry into force of request for substantive examination | ||
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Effective date of registration: 20160115 Address after: 450041 No. 82, Jiyuan Road, Zhengzhou District, Henan Patentee after: ZHENGZHOU NON-FERROUS METALS RESEARCH INSTITUTE CO., LTD. OF CHALCO Address before: 100814, Haidian District, Fuxing Road, Beijing No. 12, China Aluminum Limited by Share Ltd Patentee before: Aluminum Corporation of China Limited |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 450041 No. 82, Jiyuan Road, Zhengzhou District, Henan Patentee after: China Aluminum Zhengzhou Research Institute of Nonferrous Metals Co., Ltd. Address before: 450041 No. 82, Jiyuan Road, Zhengzhou District, Henan Patentee before: ZHENGZHOU NON-FERROUS METALS RESEARCH INSTITUTE CO., LTD. OF CHALCO |