CN101255567B - Method for optimizing aluminium electrolysis slot field - Google Patents
Method for optimizing aluminium electrolysis slot field Download PDFInfo
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- CN101255567B CN101255567B CN2007101796329A CN200710179632A CN101255567B CN 101255567 B CN101255567 B CN 101255567B CN 2007101796329 A CN2007101796329 A CN 2007101796329A CN 200710179632 A CN200710179632 A CN 200710179632A CN 101255567 B CN101255567 B CN 101255567B
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- magnetic field
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- compensation
- electrolysis cell
- cell
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 13
- 239000004411 aluminium Substances 0.000 title claims description 12
- 230000005291 magnetic effect Effects 0.000 claims abstract description 39
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 8
- 238000005457 optimization Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 10
- 210000004027 cell Anatomy 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 230000035699 permeability Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000011553 magnetic fluid Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 150000001398 aluminium Chemical class 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention provides a method for optimizing the in-cell magnetic field of aluminum electrolysis cell, relating to a magnetic field optimizing method for configuring bus of aluminum electrolysis cell. The method is characterized in that: on the way that the compensation bus goes to the object position, a ferromagnetic shielding cover is sheathed on a section where the bus has negative effect to the in-cell magnetic field in order to reduce side effect of the bus. The method effectively overcomes the drawback of the traditional compensation bus configuration by sheathing the shielding cover around part of the compensation bus located at the bottom of the electrolysis cell, thus, the compensation bus has little negative effect on the other magnetic field on the way for reducing the magnetic field of the object position, so that the magnetic field of the electrolysis cell can be easily reduced, especially applicable for the bus configuration design of large aluminum electrolysis cell with the advantages of being stable, high efficiency, long life.
Description
Technical field
A kind of method of optimizing the aluminium electrolysis cell internal magnetic field relates to the magnetic field optimization method that a kind of aluminum cell bus-bar disposes.
Background technology
Maximization along with aluminium cell, the stability of magnetic fluid all the more important in the production of electrolyzer, because the constitutional features of electrolyzer entity has determined the ununiformity of electrolyzer Distribution of Magnetic Field, present bus allocation method, it is the peak load shifting that on the basis, magnetic field of electrolyzer entity and upper bus generation, passes through the bottom land bus, make the magnetic field of aluminium liquid layer be tending towards even as much as possible, the maximum value in magnetic field and average are reduced, because the ununiformity in magnetic field and compensation bus current are going to compensate in the way of a position, can strengthen the magnetic field of other positions unavoidably, cause like this aluminium liquid layer magnetic field this that liter falls, check and balance, finally can not drop to ideal situation.And the side effect of the unstable of electrolyzer magnetic fluid in large scale electrolytic cell is just more obvious, and electromagnetic force strengthens, and aluminum liquid movement quickens, and can cause can't stably manufactured, power consumption increases, current efficiency reduces, the cell body cracky.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the shortcoming of above-mentioned tradition compensation busbar arrangement, provide a kind of compensation bus that can make in the way of weakening magnetic field, target location, to reduce other magnetic fields, position are had a negative impact, conveniently be easy to reduce electrolyzer magnetic field, establish the method for the optimization aluminium electrolysis slot field on basis for stable, efficient, the long-lived operation of large-scale aluminum electrolytic cell.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method of optimizing aluminium electrolysis slot field, its optimization method are the groove internal magnetic field to be had on one section cover of disadvantageous effect ferromagnetic shield to weaken its side effect at the compensation bus; It is characterized in that described ferromagnetic shield is that the gap is sleeved on the outer ferromagnetic shield of compensation bus.
A kind of method of optimizing aluminium electrolysis slot field of the present invention, the ferro-magnetic shield material of described ferromagnetic shield are plain carbon stool or silicon steel, permalloy ferromagnetic material.
A kind of method of optimizing aluminium electrolysis slot field of the present invention, the bed thickness of its ferromagnetic shield and cover prosthetics bus position are by the Distribution of Magnetic Field and the intensity decision at compensation bus place.The shape of ferromagnetic shield and cross section and compensation bus are suitable, must do in the arc-shaped but not the right angle in the corner of shielding case, according to the strength of current size of wanting conductively-closed and shielding cost, can select the magnetically permeable material of different magnetic permeabilities and magnetic saturation, design different shielding case thickness, also can design one deck shielding, also can design multilayer screen.Guarantee under the insulating situation as far as possible for a short time between shielding case and the bus, should be not less than 12mm, also will insulate between shielding case and the earth.Cover being defined as of thickness of cover: t=Ad/ μ, wherein, t is the thickness that shielding case needs, and A is the decrement before and after the shielding, and d is the shielding diameter, and μ is the shielding material magnetic permeability.Wherein, the magnetic field after the shielding is B=Ho/A, and wherein B is the magnetic field after shielding, and Ho is former magnetic field, and A is a decrement.
In the structure that adopts multilayer screen.Can two-layerly all realize multilayer screen with plain carbon stool, also can the internal layer low magnetic permeability, material is difficult for saturated material, the outer magnetic permeability height that uses, the magnetically permeable material that magnetic saturation intensity is low should keep the gap of 12mm between if possible two-layer shielding.When inside and outside two-layer shielding is installed, note insulation to each other.Available insulating material is done strut member.
Method of the present invention, effectively overcome the shortcoming of traditional compensation busbar arrangement, bell housing on cover around the part of compensation bus at the bottom of the electrolytic bath, the compensation bus is not had a negative impact to other part magnetic fields in the way of weakening magnetic field, target location, the convenient reduction electrolyzer magnetic field that is easy to, especially can be used in the busbar arrangement design of large-scale aluminum electrolytic cell, for the basis is established in stable, efficient, the long-lived operation of large-scale aluminum electrolytic cell.
Description of drawings
Fig. 1 is that method of the present invention is at compensation bus partial shield synoptic diagram.
Fig. 2 is the single-layer shield cover sectional view of method of the present invention.
Fig. 3 is the double cloth sectional view of the inventive method.
Embodiment
Groove aluminium liquid layer vertical magnetic field Bz generally maximum value occurs in four bights, and about X, Y-axis is near unsymmetrically, when compensation bus 1 in the electrolyzer end during from electricity input side to electricity output side, the vertical magnetic field direction that the compensation bus produces is a forward, will cause like this when the bus-bar collocation electricity output side reduces its negative sense Bz, can increase the positive maximum value in electricity input side bight simultaneously, in order to reduce to advancing the influence of electric right side of face, we add shielding case 2 in the part of bus correspondence, shielding case determines it is the single-layer shield cover as required, the cross section as shown in Figure 2, shielding case also can be a multiwalled, the cross section as shown in Figure 3.
As use the single-layer shield cover, when compensation bus 1 cross section is 300mm * 200mm, the part that the conductively-closed cover covers, the high-intensity magnetic field that adds that before conductively-closed not electrolyzer electricity input side bight is produced is made as b according to the strength of current difference, when we determine to want b is reduced to it 1/20 the time, needed shielding case size is calculated as: the minimum size of shielding case is 324 * 224, then its diameter is 324 (pressing maximum diameter calculates), the use magnetic permeability is 1000 plain carbon stool, shielding case thickness is t=Ad/ μ=20 * 324/1000=6.48mm, shield effectiveness in the actually operating can be more a little bit poorer a little than theoretical value, and we can suitably thicken shielding case a bit.
If use two layers of thickness to be 5mm, magnetic permeability is that 1000 shielding case shields this bus, then the rate of fall-off of the first layer is: A=t μ/d=5 * 1000/324=15.4, the rate of fall-off of the second layer is: A=t μ/d=5 * 1000/348=14.4, then the magnetic field after the shielding can reduce to guarantee under the insulating situation between original 14.4 * 15.4=221/shielding case and the bus as far as possible little, should be not less than 12mm, also to insulate between shielding case and the earth, the gap that also should keep 12mm between two-layer shielding, insulated from each other, available insulating material is done strut member.
Claims (1)
1. method of optimizing aluminium electrolysis slot field, its optimization method are the groove internal magnetic field to be had on one section cover of disadvantageous effect ferromagnetic shield to weaken its side effect at the compensation bus; It is characterized in that described ferromagnetic shield is that the gap is sleeved on two layers of outer ferromagnetic shield of compensation bus; The gap that keeps 12mm between two-layer shielding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101796329A CN101255567B (en) | 2007-12-17 | 2007-12-17 | Method for optimizing aluminium electrolysis slot field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101796329A CN101255567B (en) | 2007-12-17 | 2007-12-17 | Method for optimizing aluminium electrolysis slot field |
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| CN101255567A CN101255567A (en) | 2008-09-03 |
| CN101255567B true CN101255567B (en) | 2010-08-25 |
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| CN2007101796329A Active CN101255567B (en) | 2007-12-17 | 2007-12-17 | Method for optimizing aluminium electrolysis slot field |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296326B (en) * | 2011-06-07 | 2014-03-12 | 河南中孚实业股份有限公司 | Magnetic shielding aluminum electrolytic cell |
| CN103649375A (en) * | 2011-07-12 | 2014-03-19 | 力拓艾尔坎国际有限公司 | Aluminium smelter comprising electrical conductors made from a superconducting material |
| CN102234817B (en) * | 2011-08-04 | 2013-03-20 | 中国铝业股份有限公司 | Method for lowering electrolytic cell energy consumption by optimizing aluminium electrolysis magnetic field |
| CN111455409B (en) * | 2020-05-25 | 2021-07-30 | 有研资源环境技术研究院(北京)有限公司 | Coating material of magnetic shielding tank shell for vertical aluminum electrolytic tank and preparation method of magnetic shielding tank shell |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2003118901A (en) * | 2003-06-23 | 2005-01-10 | Общество с ограниченной ответственностью "Инженерно-технологический центр" (RU) | COMPENSATION DEVICE |
| CN1724713A (en) * | 2005-06-30 | 2006-01-25 | 贵阳铝镁设计研究院 | Bus allocation method of 350 KA aluminium electrolytic tank |
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- 2007-12-17 CN CN2007101796329A patent/CN101255567B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2003118901A (en) * | 2003-06-23 | 2005-01-10 | Общество с ограниченной ответственностью "Инженерно-технологический центр" (RU) | COMPENSATION DEVICE |
| CN1724713A (en) * | 2005-06-30 | 2006-01-25 | 贵阳铝镁设计研究院 | Bus allocation method of 350 KA aluminium electrolytic tank |
Non-Patent Citations (1)
| Title |
|---|
| 杨叶伟，王进录.横短母线磁场对铝电解过程影响及解决办法.云南冶金29.2000,2932-33. * |
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| CN101255567A (en) | 2008-09-03 |
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