CN201793763U - Novel assembled graphitized special cathode for aluminium electrolysis - Google Patents
Novel assembled graphitized special cathode for aluminium electrolysis Download PDFInfo
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- CN201793763U CN201793763U CN2010205483674U CN201020548367U CN201793763U CN 201793763 U CN201793763 U CN 201793763U CN 2010205483674 U CN2010205483674 U CN 2010205483674U CN 201020548367 U CN201020548367 U CN 201020548367U CN 201793763 U CN201793763 U CN 201793763U
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Abstract
The utility model relates to a novel assembled graphitized special cathode for aluminium electrolysis, comprising main body blocks and a graphitized cathode choke flow block, wherein the longitudinal edges of the main body blocks are symmetrically provided with grooves; and the graphitized cathode choke flow block made of materials different from that of the main body block, which crosses two main body block, is embedded in the two grooves. The novel graphitized special cathode adopts a mode of embedding the choke flow block on a joint seam of the two cathode main body blocks in a 'pole-crossing' manner, the pole distance of aluminium electrolysis is reduced, the voltage of groove voltage is reduced by about 0.35v-0.5v, one ton of aluminium can save energy by more than or equal to 1000KWh, and the effects of saving energy and reducing consumption are obvious. The novel assembled graphitized special cathode not only can prevent from grooving in the middle of the main body blocks, reducing the effective thicknesses of the main body blocks and further influencing the service lives of the main body blocks, but also can achieve the purpose of carrying out local structure reinforcement on the joint seam of the main body blocks, thus prolonging the service life of an electrolytic bath.
Description
Technical field
The utility model belongs to technical field of aluminum electrolysis, particularly a kind of electrolysis of aluminum specially-shaped cathode of producing metallic aluminium with fused salt electrolysis process.
Background technology
Aluminium is with the alumina molten salt electrolysis manufactured, its ultimate principle: fused Al
2O
3Electrochemical reaction takes place under the effect of direct current between anode/cathode makes Al/O separate Al
3+Constantly form the Al drop and build up into a large amount of aluminium liquid at the negative electrode electron gain, and O
2-Constantly lose electronics and generate a large amount of CO with the C reaction at anode
2, its chemical equation is 2Al
2O
3+ 3C=4Al+3CO
2, need to consume a large amount of electric energy in this reaction process.The electrolysis of aluminum direct current consumption is followed following formula: direct current consumption=2980 * V/ μ (V represents bath voltage, and because of " pole span " changes, μ represents current effect, modern electrolyzer is 0.93-0.95).Practice shows that the distance between anode and the liquid aluminum (being called for short " pole span ") is very big to the influence of electrolytic aluminum power consumption, and under the situation of using existing flush type conventional cathode, fused salt electrolysis process is produced the direct current consumption of metallic aluminium between 13500～13800kWh/tAl.Because of factor affecting such as aluminium cell is fed in raw material, magnetic field, electric field, anode change, anodic gas effusions, liquid aluminum can produce fluctuation and forms " turbulent flow " in the groove, and " turbulent flow " can play " stirrings " effect to electrolytic solution and reduce the ionogen precipitation and help production on the one hand; " turbulent flow " causes that liquid fluctuating causes " pole span " increase and power consumption is raise on the other hand, and " turbulent flow " negative electrode easy to wear reduces cathode life simultaneously.At the research and the inventive aspect of used for aluminium electrolysis specially-shaped cathode, we retrieve following domestic and international open source literature:
1. Chinese patent, title: a kind of abnormal cathode carbon block structure aluminum electrolysis bath, application (patent) number: 200710010523.4 applyings date: 2007.3.2., classification number: C25C3/08 (2006.1) applies for (patent right) people: Feng is sample, summary: this abnormal cathode carbon block structure aluminum electrolysis bath, comprise pot shell, be arranged on the flame-proof thermal insulation material of bottom, anode and negative electrode, cathode block is a polymorphic structure, promptly form some projectioies on the surface of cathode block, the cathode construction aluminium cell of this invention can slow down the velocity of flow of electrolyzer inner cathode aluminium liquid and reduce the fluctuation height of aluminium liquid, thereby reach the stability of the metallic aluminium liquid level that improves aluminium cell, reduce the solution loss of aluminium, improve current efficiency and reduce pole span, reduce the Aluminium Electrolysis power consumption, and the mixture or the throw out that between the body of wall of cathode bottom projection, can form thickness cryolite melts aluminum oxide, stop negative electrode aluminium liquid to flow into bottom land by bottom land crackle and slit, the fusing rod iron reaches the purpose that prolongs bath life.The polymorphic structure cathode carbon piece of the projection of this invention is to fuse with main body block, the material of the bright utmost point carbon block structure of abnormity is the same with the cathode block of traditional electrolyzer, it can be the abnormal cathode carbon block that is made by hard coal, also can be the abnormal cathode carbon block that broken or hard coal and the broken blended stock of synthetic graphite make by synthetic graphite, can also be the abnormal cathode carbon block of greying or semi-graphited.Though this invention improves the cathode construction of electrolysis of aluminum, be convenient to produce and operation, obtain certain positively effect, but had following deficiency:
A) bossing and body belong to homogeneous material, and bossing is washed away greatly by aluminium liquid " turbulent flow ", thus the life-span far below body part, along with the loss of bossing, power savings descends obviously.
B) green compact must be made bulge-structure during the rat moulding, incompatibilities such as its existing molding device, mould, stoving oven shove charge must drop into huge fund to original production unit and carry out technological transformation and can realize industrialization.Even after the technological transformation, the cathode surface bossing causes the crackle waste product easily.
C) the be unrealized weak link of anticathode combining site is carried out structural strengthening.
D) forming the mixture of thickness cryolite melts aluminum oxide or throw out between the body of wall of cathode bottom projection, to help prolonging cell life be a kind of misleading, and this can increase bottom land resistivity, increases unnecessary power consumption.
2. Chinese patent, title: a kind of can slowing down cathode the novel cathode structure aluminium cell application (patent) number of protruding abrasion: CN200910248884.1 classification number: C25C3/08 (2006.01) I apply for (patent right) people: the Feng Naixiang address: 110004 11-3, No.2, Lane 7, Nanhuwanghu Bei Road, Heping District, Shenyang City, Liaoning Province summary: a kind of novel cathode structure aluminium cell of energy slowing down cathode protruding abrasion, along its length limit portion is processed with bulge-structure on each cathode block, is called the length direction projection; Or, be called the width projection in the perpendicular projection of length direction of cathode block top processing with cathode block; Or in cathode block top portion while processing length direction projection and width projection.The centre of cathode block projection is inlaid with one deck refractory materials wallboard, the cathode block projection constitutes integrated convex with the refractory materials wallboard, integrated convex has and slows down flow rate of aluminium liquid, reduces the effect that the aluminium fluid wave is moving, improve electrolyzer liquid aluminum stability, after the cathode block projection is by abrasion, because the refractory materials wallboard is littler than the electrochemistry abrasiveness of carbon, the refractory materials wallboard can continue to play the effect that slows down flow rate of aluminium liquid.Principal claim: a kind of can slowing down cathode the novel cathode structure aluminium cell of protruding abrasion, the limit portion along its length that it is characterized in that on each cathode block is processed with bulge-structure, is called the length direction projection; Or, be called the width projection in the perpendicular projection of length direction of cathode block top processing with cathode block; Or in cathode block top portion while processing length direction projection and width projection; Three kinds of structure formations are as follows: the height that (1) along its length limit portion on each cathode block is processed with length direction projection length direction projection is 10～18cm, width is 5～15cm, be positioned at each cathode block limit portion along its length, and the horizontal throw at the outer surface of this length direction projection and cathode block edge is 1～3cm, the centre joint of two adjacent cathode blocks is made connection firm by ramming with the carbon element ramming paste, the height of ramming paste equates with the height of cathode block, lay a refractory materials wallboard at the upper surface of two adjacent cathode block ramming pastes, between per two adjacent cathode blocks, the length direction of refractory materials wallboard and adjacent two cathode block limit portions projection constitutes an entire length direction projection; (2) on cathode block top simultaneously processing length direction projection and width ledge width direction projection between two above-mentioned entire length direction projectioies, the width projection is as a whole with cathode block, on each cathode block, the distance between the entire length direction projection that the width projection is adjacent is 5～10cm; (3) on each cathode block of cathode block top working width direction projection, distance between per two width projectioies is 20～40cm, the height of width projection is 10～18cm, width is 18～30cm, and length is consistent with the width of cathode block or less than the width 2～6cm of cathode block.
This invention except with identical technical problem that document 1 exists, also exist owing to adopt refractory materials---be non-conducting material, will be directed at the cell resistance rate and improve, increase power consumption, deviate from mutually with energy-conservation target.
Summary of the invention
The purpose of this utility model is at above-mentioned existing problems, provide a kind of and can utilize existing installation production, production cost is low, the choker bar life-span long (with the same life-span of electrolyzer), realize that simultaneously the weak link of two cathode body agllutinations being closed the position carries out structural strengthening, solve aluminium electrolyte and easily close the used for aluminium electrolysis composite profile negative electrode of the technical problem of position bakie from two cathode body agllutinations.
The utility model is achieved in that
A kind of aluminium electrolysis combination greying specially-shaped cathode, comprise main body block and graphitization cathode choker bar, the main body block longitudinal edge is arranged with two groups of grooves, the graphitization cathode choker bar that is different from the main body block material is crossed over the connection seam between two main body block, be embedded in the groove of two groove combination one-tenth, and with thickener graphitization cathode choker bar (3) is made on main body block (1) firm by ramming i.e. " striding the utmost point inlays " choker bar on two cathode body piece joint closes.The physical dimension of main body block, choker bar, inlaying that array mode and machining require can be according to electrolyzer size and transformer installed capacity and decide.
Above-described aluminium electrolysis combination greying specially-shaped cathode, its main body block is common used for aluminium electrolysis charcoal bulk matter, choker bar is a used for aluminium electrolysis greying material.
The distance at the lateral outer side edge of above-described graphitization cathode choker bar and main body block is 300～380mm, so that aluminium cell anode operation or maintenance the time can not break or hit loose choker bar, spacing between two graphitization cathode choker bars is 300～350mm, is convenient to the charging of the cell operation.
Above-described aluminium electrolysis combination greying specially-shaped cathode, the connection seam between the main body block is to make firm by ramming with thickener.
Above-described aluminium electrolysis combination greying specially-shaped cathode, the degree of depth of its groove is 100～150mm, width is 80～100mm.
Above-described used for aluminium electrolysis combination greying specially-shaped cathode, the transverse section of graphitization cathode choker bar is rectangle or convex; When the transverse section was convex, graphitization cathode choker bar top was provided with chamfering, and the angle of chamfering is 135 °～175 °, and the chamfering height is 30～60mm.
The utility model used for aluminium electrolysis combination greying specially-shaped cathode compared with prior art has following advantage:
(1) adopts " striding the utmost point inlays " choker bar mode on two cathode body piece joint closes, constitute energy-conservation greying specially-shaped cathode, this negative electrode can be stablized aluminium liquid liquid level by the choker bar of projection and reduce pole span 〉=10mm, reduces the about 0.35～0.5V of bath voltage, reaches the purpose that electrolytic aluminum per ton is saved power consumption 〉=1000kWh.
(2) adopt " striding the utmost point inlays " mode, both can avoid reducing the main body block net thickness and influence its life-span at the middle fluting of main body block, can reach the purpose that main body block weak part (main body block joint close) is carried out the local structure reinforcement again, thereby prolong bath life.
(3) adopt the unlike material material to produce to main body block, choker bar, quality-improving is with strong points, enforcements is simple, also can reduce cost.
(4) existing main equipment, mould, the type of furnace etc. need not change strong operability in the negative electrode production process.
When (5) using, it is simple, consistent with existing aluminum electrolysis process to build groove.
Description of drawings:
Fig. 1 is the utility model aluminium electrolysis combination greying specially-shaped cathode stereographic map.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the right view of Fig. 1.
Among the figure, 1 is main body block, and 2 for connecting seam, and 3 is the greying choker bar, and 4 is groove, and 5 is break corner.
Embodiment
As shown in Figure 1, one of them aluminium electrolysis combination greying specially-shaped cathode of the utility model, the physical dimension of main body block and choker bar length are decided according to electrolyzer size and transformer installed capacity; Offering two groups of degree of depth in main body block (1) longitudinal edge symmetry is 100mm, and width is the groove (4) of 80mm, and groove (4) is 300mm with the distance at the lateral outer side edge of main body block, and the spacing between two grooves (4) of the same side is 300mm; To be different from the main body block material, the transverse section is an orthogonal, highly be 120mm, and width is the connection seam (2) that the graphitization cathode choker bar (3) of 150mm is crossed over two main body block (1), be embedded in the groove that two grooves (4) are combined in; With thickener the seam of the connection between the main body block (1) (2) is made firm by ramming and with thickener graphitization cathode choker bar (3) made firm by ramming on main body block (1) more at last.Get final product.
As shown in Figure 1, one of them aluminium electrolysis combination greying specially-shaped cathode of the utility model, the physical dimension of main body block and choker bar length are decided according to electrolyzer size and transformer installed capacity; Offering two groups of degree of depth in main body block (1) longitudinal edge symmetry is 125mm, and width is the groove (4) of 90mm, and groove (4) is 340mm with the distance at the lateral outer side edge of main body block, and the spacing between two grooves (4) of the same side is 325mm; To be different from the main body block material, the transverse section is an orthogonal, highly be 190mm, and width is the connection seam (2) that the graphitization cathode choker bar (3) of 175mm is crossed over two main body block (1), be embedded in the groove that two grooves (4) are combined in; With thickener the seam of the connection between the main body block (1) (2) is made firm by ramming and with thickener graphitization cathode choker bar (3) made firm by ramming on main body block (1) more at last.Get final product.
As shown in Figure 1, one of them aluminium electrolysis combination greying specially-shaped cathode of the utility model, the physical dimension of main body block and choker bar length are decided according to electrolyzer size and transformer installed capacity; Offering two groups of degree of depth in main body block (1) longitudinal edge symmetry is 150mm, and width is the groove (4) of 100mm, and groove (4) is 380mm with the distance at the lateral outer side edge of main body block, and the spacing between two grooves (4) of the same side is 350mm; To be different from the main body block material, the transverse section is a convex, whole height is 260mm, integral width is 200mm, the angle of break corner (5) is 135 °, the chamfering height is the connection seam (2) that the graphitization cathode choker bar (3) of 30mm is crossed over two main body block (1), be embedded in the groove that two grooves (4) are combined in; With thickener the seam of the connection between the main body block (1) (2) is made firm by ramming and with thickener graphitization cathode choker bar (3) made firm by ramming on main body block (1) more at last.Get final product.
As shown in Figure 1, one of them aluminium electrolysis combination greying specially-shaped cathode of the utility model, the physical dimension of main body block and choker bar length are decided according to electrolyzer size and transformer installed capacity; Offering two groups of degree of depth in main body block (1) longitudinal edge symmetry is 150mm, and width is the groove (4) of 100mm, and groove (4) is 380mm with the distance at the lateral outer side edge of main body block, and the spacing between two grooves (4) of the same side is 350mm; To be different from the main body block material, the transverse section is a convex, whole height is 260mm, integral width is 200mm, the angle of break corner (5) is 150 °, the chamfering height is the connection seam (2) that the graphitization cathode choker bar (3) of 45mm is crossed over two main body block (1), be embedded in the groove that two grooves (4) are combined in; With thickener the seam of the connection between the main body block (1) (2) is made firm by ramming and with thickener graphitization cathode choker bar (3) made firm by ramming on main body block (1) more at last.Get final product.
As shown in Figure 1, one of them aluminium electrolysis combination greying specially-shaped cathode of the utility model, the physical dimension of main body block and choker bar length are decided according to electrolyzer size and transformer installed capacity; Offering two groups of degree of depth in main body block (1) longitudinal edge symmetry is 150mm, and width is the groove (4) of 100mm, and groove (4) is 380mm with the distance at the lateral outer side edge of main body block, and the spacing between two grooves (4) of the same side is 350mm; To be different from the main body block material, the transverse section is a convex, whole height is 260mm, integral width is 200mm, the angle of break corner (5) is 175 °, the chamfering height is the connection seam (2) that the graphitization cathode choker bar (3) of 60mm is crossed over two main body block (1), be embedded in the groove that two grooves (4) are combined in; With thickener the seam of the connection between the main body block (1) (2) is made firm by ramming and with thickener graphitization cathode choker bar (3) made firm by ramming on main body block (1) more at last.Get final product.
Claims (6)
1. an aluminium electrolysis makes up the greying specially-shaped cathode, comprise main body block (1) and graphitization cathode choker bar (3), it is characterized in that: main body block (1) longitudinal edge is arranged with two groups of grooves (4), graphitization cathode choker bar (3) is crossed over the connection seam (2) between two main body block (1), be embedded in the groove that two grooves (4) are combined into, and graphitization cathode choker bar (3) made firm by ramming on main body block (1) with thickener.
2. aluminium electrolysis combination greying specially-shaped cathode according to claim 1, it is characterized in that: main body block (1) is common used for aluminium electrolysis charcoal bulk matter, and choker bar (3) is a used for aluminium electrolysis greying material.
3. aluminium electrolysis combination greying specially-shaped cathode according to claim 1, it is characterized in that: described graphitization cathode choker bar (3) is 300～380mm with the distance at the lateral outer side edge of main body block, and same spacing between two graphitization cathode choker bars (3) longitudinally is 300～350mm.
4. aluminium electrolysis combination greying specially-shaped cathode according to claim 1, it is characterized in that: the connection seam (2) between the main body block (1) is made firm by ramming with thickener.
5. used for aluminium electrolysis combination greying specially-shaped cathode according to claim 1, it is characterized in that: the degree of depth of groove is 100～150mm, width is 80～100mm.
6. used for aluminium electrolysis combination greying specially-shaped cathode according to claim 1, it is characterized in that: the transverse section of described graphitization cathode choker bar (3) is rectangle or convex.
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| CN2010205483674U CN201793763U (en) | 2010-09-30 | 2010-09-30 | Novel assembled graphitized special cathode for aluminium electrolysis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949035A (en) * | 2010-09-30 | 2011-01-19 | 广西强强碳素股份有限公司 | Novel composite graphitized deformed cathode for aluminium electrolysis |
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2010
- 2010-09-30 CN CN2010205483674U patent/CN201793763U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949035A (en) * | 2010-09-30 | 2011-01-19 | 广西强强碳素股份有限公司 | Novel composite graphitized deformed cathode for aluminium electrolysis |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110413 Effective date of abandoning: 20120606 |