CN101328594A - Method for adjusting aluminum cell current distribution - Google Patents
Method for adjusting aluminum cell current distribution Download PDFInfo
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- CN101328594A CN101328594A CNA2007100118291A CN200710011829A CN101328594A CN 101328594 A CN101328594 A CN 101328594A CN A2007100118291 A CNA2007100118291 A CN A2007100118291A CN 200710011829 A CN200710011829 A CN 200710011829A CN 101328594 A CN101328594 A CN 101328594A
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- aluminum
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Abstract
The invention discloses a method for adjusting current distribution of an aluminum electrolytic cell. An aluminum guide rod on a prebaked anode group is in transitional connection with an anode steel claw through adopting an aluminum-steel explosive welding chip; moreover, tests show that temperature has great influence on the conductivity of part of the aluminum-steel explosive welding chip, and the conductivity of the part is reduced as temperature drops. By means of the rule, an anode with greater conductivity can adopt an air pipe to blow and cool down an aluminum-steel explosive welding chip part during the baking and starting of an aluminum electrolytic cell so as to reduce the current passing through the set of anodes; therefore, overall anode current distribution of the electrolytic cell tends to evenness, and the probability of anode carbon block blowoff is reduced due to overheating, thereby reaching the goal of prolonging the service of the electrolytic cell. The method has simple, convenient and safe use process, and is suitable for anode current distribution adjustment of all aluminum electrolytic cells which take scorched particles or scorched particles-mixing graphite as medium to carry out baking and starting.
Description
(1) technical field
The invention belongs to technical field of aluminum electrolysis, be specifically related to a kind of method that the prebaked cell for aluminum-reduction anodic current distributes of adjusting.
(2) background technology
Prebaked cell for aluminum-reduction after the newly-built or overhaul must just can change ordinary production over to starting through roasting.Roasting, start-up course have only 4～5 days time usually, but to playing an important role in the work-ing life of electrolyzer and the ordinary production in later stage.Because baking coke particles can heat up gradually, has avoided the thermal shocking to electrolyzer, heat-up rate is very fast, and the negative electrode crack is filled by ionogen rather than aluminium liquid, can improve bath life to a certain extent.Therefore, modern large-scale pre-baked aluminum electrolysis cell adopts the method for baking coke particles to carry out roasting and starting more.But baking coke particles has a shortcoming again, promptly makes the anodic current skewness easily, and then causes cathode surface temperature inequality, produce the local superheating phenomenon, making cathode block cause because of expanded by heating is uneven has influenced bath life by cracking, increase the overhaul number of times, increased the electrolytic cell overhaul expense.Also can discharge a large amount of bazardous wastes simultaneously, cause environmental pollution.
Domestic each electrolytic aluminium factory is mainly taked from anode steel jaw to the shunting of cathode steel bar welding (or overlap joint) ironware, air-cooled anode block, three kinds of shunt methods of single group anodal opening at present.These three kinds of methods all have its weak point.Anode steel jaw needs a large amount of welding jobs to the shunting of cathode steel bar welding (or overlap joint) ironware, need not after need artificial dismounting because potroom magnetic field is big, Working environment is arduous, welding and to remove workload big expends a large amount of artificial.Carry out and be interrupted outage conducting electricity big single group anode, the time of outage is difficult for accurately grasping, because one pole outage back temperature of anode descends, suddenly cold and hot causes to change before and after this group anode conducting excessively, causes the excessive too small problem of single group anodic current equally.Air-cooled anode block can only reduce the temperature of the phosphorous pig iron in anode carbon element surface, the carbon bowl, and little for anode steel jaw and the influence of carbon body bulk temperature, shunting effect is not obvious.
(3) summary of the invention
The method that the objective of the invention is to adopt a kind of new adjustment anodic current to distribute; the side effect of avoiding traditional method to bring; thereby make the roasting of electrolyzer, start-up course more steady; be beneficial to and prolong bath life; reduce the electrolytic cell overhaul expense; minimizing is of value to environment protection because of the solid industry Harmful Waste that electrolytic cell overhaul produces.
Aluminium guide bar on the prebaked anode group substantially all adopts aluminium-steel blast weld tabs to carry out transition and be connected with anode steel jaw, and in test, we find that temperature is very big to the electric conductivity influence of aluminium-steel blast weld tabs part, and temperature is low more, and this partially conductive rate is low more.Utilize this rule, in the roasting of aluminium cell, start-up course, to conducting electricity anode bigger than normal, can take air-cooled reduction aluminium-steel blast weld tabs method of temperature to reduce by this group anodic electric current, make the whole anodic current of electrolyzer distribute and be tending towards even, and then impel each position temperature of negative electrode to be tending towards evenly, and reduce anode and cathode carbon piece because of the probability of explosion takes place in burning, reach the purpose that prolongs bath life.Technical scheme of the present invention is: in the roasting of aluminium cell, start-up course, to conducting electricity anode bigger than normal, adopt airduct to aluminium-steel blast weld tabs position blowing cooling, to reduce by this group anodic electric current.
This method use is simple, convenient, safety.After treating that this anodic current of process measurement is tending towards medial temperature, remove or close airduct and get final product.The excessive processing of cathodic current is identical with anode, and need not be with the anodal opening of correspondence.
This method has been avoided welding the shunting of (or overlap joint) ironware from anode steel jaw to cathode steel bar, air-cooled anode block, and implementation is interrupted the side effect that these three kinds of methods of outage are adjusted the anodic current distribution to list group anode block.Thereby make roasting groove anode and cathode electric current be tending towards evenly, directly make the cathode block temperature distribution be tending towards evenly, avoided hardening cracking the generation probability of anode, cathode block technical error, help prolonging cell life.
The present invention is applicable to that all are that the anodic current of the medium aluminium cell that carries out roasting, startup distributes and adjusts with burnt grain or the burnt grain graphite that is mixed.Because simple, convenient and safe, effective, airduct, iron pipe can be repeatedly used, breakage rate is very little, and is almost immaculate, and application prospect of the present invention is very good.
The present invention is simple to operate, only need utilize magnetic field that airduct is ridden on the anode steel jaw, aims at the blowing of blast weld tabs, very convenient, safety.After treating that electric current lowers, remove or close airduct and get final product; It is fierce, very mild that process changes unlike single group anodal opening.
(4) description of drawings
Accompanying drawing rides on the anode steel jaw to the dry synoptic diagram of cooling of aluminium-steel blast weld tabs position with iron pipe for the present invention.
(5) embodiment
The positive bar 1 of aluminium cell is fixed on the aluminium guide bar 3 by spiral jig 2, and aluminium guide bar 3 is connected on the anode steel jaw 5 by blast weld tabs 4.6 pairs of blasts of the iron pipe that employing of the present invention is connected with sebific duct 7 weld tabs, 4 position wind cooling temperature lowerings are adjusted anodic current.
The pressurized air of employing wind cooling temperature lowering can directly be selected 4～5Mpa pressurized air of potroom for use.Forced air cooled tube adopts sebific duct, and sebific duct length can be according to the actual intercepting of work on the spot.
Claims (3)
1, a kind ofly adjusts the method that aluminum cell current distributes, it is characterized in that: in the roasting of aluminium cell, start-up course,, adopt airduct to aluminium-steel blast weld tabs position blowing cooling, to reduce by this group anodic electric current to conducting electricity anode bigger than normal.
2, the method for adjustment aluminum cell current distribution according to claim 1, it is characterized in that: said airduct is to connect iron pipe (6) with sebific duct (7) front end, the mouth of pipe is to the cooling of drying of aluminium-steel blast weld tabs position, sebific duct (7) the other end is connected with potroom compressed air tap, pneumatic line termination mounted valve is adjusted compressed air require.
3, the method for adjustment aluminum cell current distribution according to claim 2 is characterized in that: iron pipe (6) length is at 1200～1500mm, and iron pipe (6) directly rides on the anode steel jaw (5) when operation, utilizes on-the-spot magnetic field force to fix airduct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100118291A CN101328594A (en) | 2007-06-22 | 2007-06-22 | Method for adjusting aluminum cell current distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100118291A CN101328594A (en) | 2007-06-22 | 2007-06-22 | Method for adjusting aluminum cell current distribution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101328594A true CN101328594A (en) | 2008-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100118291A Pending CN101328594A (en) | 2007-06-22 | 2007-06-22 | Method for adjusting aluminum cell current distribution |
Country Status (1)
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| CN (1) | CN101328594A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560546A (en) * | 2010-12-07 | 2012-07-11 | 冯乃祥 | Anode structure of aluminum electrolytic tank |
| CN102703934A (en) * | 2012-06-08 | 2012-10-03 | 云南铝业股份有限公司 | Method for improving calcination temperature evenness of aluminium electrolysis cell |
| CN104005053A (en) * | 2014-04-29 | 2014-08-27 | 中国铝业股份有限公司 | Apparatus for realizing anode current diversion during aluminum electrolysis cell baking |
| CN105420757A (en) * | 2015-12-21 | 2016-03-23 | 云南云铝涌鑫铝业有限公司 | Cooling device for prebaked cell |
-
2007
- 2007-06-22 CN CNA2007100118291A patent/CN101328594A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560546A (en) * | 2010-12-07 | 2012-07-11 | 冯乃祥 | Anode structure of aluminum electrolytic tank |
| CN102703934A (en) * | 2012-06-08 | 2012-10-03 | 云南铝业股份有限公司 | Method for improving calcination temperature evenness of aluminium electrolysis cell |
| CN102703934B (en) * | 2012-06-08 | 2015-05-20 | 云南铝业股份有限公司 | Method for improving calcination temperature evenness of aluminium electrolysis cell |
| CN104005053A (en) * | 2014-04-29 | 2014-08-27 | 中国铝业股份有限公司 | Apparatus for realizing anode current diversion during aluminum electrolysis cell baking |
| CN105420757A (en) * | 2015-12-21 | 2016-03-23 | 云南云铝涌鑫铝业有限公司 | Cooling device for prebaked cell |
| CN105420757B (en) * | 2015-12-21 | 2018-06-08 | 云南云铝涌鑫铝业有限公司 | For the heat sink of pre-baking tank |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081224 |