CN107779910A - A kind of structure and method for reducing aluminium electrolysis anode steel charcoal pressure drop - Google Patents
A kind of structure and method for reducing aluminium electrolysis anode steel charcoal pressure drop Download PDFInfo
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- CN107779910A CN107779910A CN201610737624.0A CN201610737624A CN107779910A CN 107779910 A CN107779910 A CN 107779910A CN 201610737624 A CN201610737624 A CN 201610737624A CN 107779910 A CN107779910 A CN 107779910A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/12—Anodes
- C25C3/125—Anodes based on carbon
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Abstract
The invention discloses a kind of structure and method for reducing aluminium electrolysis anode steel charcoal pressure drop, the structure includes anode steel claw, phosphorus pig iron ring, carbon block, there is cylindrical charcoal bowl in carbon block, steel pawl pawl head is inserted in charcoal bowl, it is casting phosphorus pig iron ring between pawl head and charcoal bowl circumferential weld, characterized in that, the charcoal bowl surface contacted with steel pawl, the phosphorus pig iron is coated with the easy conductive coat of metal.Implementation method is, in aluminium electrolysis anode assembling process, first to the coat of metal of charcoal bowl surface one layer of easy conductive of plating of anode carbon block, is then linked together again with steel pawl with phosphorus pig iron casting, to be assembled to be used into electrolysis groove after new anode.The present invention can be effectively improved carbon block in aluminium electrolysis anode and bad situation is connected with metal, steel pawl is connected with carbon block more fully close, reduce contact resistance, realizing reduces the pressure drop of anode steel charcoal, reduces power consumption.It is average at least to reduce anode steel charcoal pressure drop 20mV using structures and methods provided by the invention, so as to be effectively reduced a ton aluminium power consumption.
Description
Technical field
The invention belongs to aluminium electroloysis metallurgical technology field, relates generally to a kind of knot for reducing aluminium electrolysis anode steel-charcoal pressure drop
Structure and method.
Background technology
China's Aluminium Industry passes through the development of many decades, and production scale constantly expands, and technology and equipment level also obtains
Large increase, but for overall production status, China's electrolytic aluminium comprehensive utilization rate of energy source is still lower than international most advanced level
15% or so, ton aluminium power consumption is also higher by 300~800kWh than international most advanced level, therefore realizes further energy-saving one
It is directly the key subjects of domestic aluminum electrolysis industry.And carbon anode is known as the title of electrolytic cell " heart ", whole anode drop accounts for
The 8%~12% of tank voltage, thus anode total quality level is lifted, especially improve the electric conductivity of anode, be to reduce ton
The most effective approach of aluminium power consumption.
Carbon anode structure is mainly made up of aluminum guide, steel pawl and carbon block three parts, and aluminum guide and steel pawl are exploded by aluminium-steel
Weld tabs is connected, and steel pawl is connected with carbon block by the charcoal bowl structure casting phosphorus pig iron.Anode drop is guide rod pressure drop, aluminium-steel blast weldering
Pressure drop, the pressure drop of steel pawl, steel-charcoal pressure drop, a few part sums of carbon block pressure drop, in anode drop design, steel-charcoal voltage drop value often accounts for
Half to whole anode drop or so, it is the emphasis exploited potentialities, other aluminum guides, blast welding block, steel pawl, anode carbon block etc.
Component is generally all standardization customization, and the reduction space of pressure drop is relatively limited, thus reduces steel-charcoal pressure drop as whole sun is reduced
The key of extreme pressure drop.
Anode carbon block is in process is calcined, and air, vapor and the binding agent of residual decompose in shaping raw product
Gas can raise volatilization discharge with temperature, finished product carbon block is formed microcosmic porous institutional framework, especially charcoal
The presence of block surface pore, when the carbon block is connected with steel pawl by the phosphorus pig iron of casting, carbon block-metal interface is caused on microcosmic
It fully can not completely combine, cause loose contact, so as to produce larger contact resistance, this causes steel-charcoal pressure drop larger
Essential reason.
Research for reducing steel-charcoal pressure drop, be concentrated mainly on improves phosphorus iron quality and optimization attachment structure at present
Design aspect, such as Chinese patent CN1111601C《Phosphorous pig iron for assembling anode for electrolysis of aluminium》Etc. disclose by adjust element into
Divide the method for improving phosphorus pig iron performance and then reducing pressure drop, CN103726073A《A kind of aluminum electrolyzing cell used anode carbon block group》、
CN104726898A《The coupling method and anode carbon element block and anode claw of anode carbon element block and anode claw》、CN102108525B
《Method for connecting electrolytic aluminum anode without pouring》Realize that reduction is pressed Deng by way of improving, optimizing steel pawl and carbon block attachment structure
Drop.The former is mainly simple to lift phosphorus pig iron self performance, and the latter, which often results in anode construction, to be tended to complicate.In addition,
CN102534673A《Reduce aluminium cell anode steel pawl and the method and structure of carbon block contact drop》、CN104514009A
《A kind of seamless grouting method of anode for reducing iron carbon pressure drop》Also disclose using aluminium liquid or electrically conductive graphite slurry penetrate into iron hoop with
Method between charcoal bowl in gap reduces pressure drop, and this kind of method thinks to improve has trickle contracting seam between the phosphorus pig iron and carbon block
The defects of.And actually if the component quality such as ferrophosphorus, carbon block is up to standard, newly as temperature gradually rises charcoal bowl diameter after extremely upper groove
Diminish, ferrophosphorus ring diameter becomes big, contracting seam can reduce therewith, and when temperature reaches 400 DEG C or so, this contracting macroscopically is stitched will
Lock-out.In a word, the above method all serves certain effect to reducing steel-charcoal pressure drop, but solution all not yet in effect is foregoing micro-
Sight aspect carbon block-metal interface contacts bad essential problem, and steel-charcoal pressure drop still has very big decline space.
The content of the invention
It is existing to solve present invention aims at a kind of structure and method for reducing aluminium electrolysis anode steel-charcoal pressure drop of offer
The deficiency of technology, bad situation is contacted with metal joint face by improving carbon block, effectively reduce contact resistance, realizing reduces sun
Pole steel-charcoal pressure drop, reduce power consumption.
The technical scheme is that：
A kind of structure for reducing aluminium electrolysis anode steel-charcoal pressure drop, including anode steel claw, phosphorus pig iron ring, carbon block, have in carbon block
There is cylindrical charcoal bowl, steel pawl pawl head is inserted in charcoal bowl, is casting phosphorus pig iron ring between pawl head and charcoal bowl circumferential weld.Reduction of the present invention
The architectural feature of aluminium electrolysis anode steel-charcoal pressure drop is, and the charcoal bowl surface of steel pawl, the phosphorus pig iron contact is coated with easy conductive metal-plated
Layer.
A kind of method for reducing aluminium electrolysis anode steel-charcoal pressure drop, in aluminium electrolysis anode assembling process, first to anode carbon block
Charcoal bowl surface one layer of easy conductive of plating the coat of metal, then linked together again with steel pawl with phosphorus pig iron casting, it is to be assembled
Electrolysis groove uses after into new anode.
The coat of metal is copper, nickel, preferably one kind of silver, copper.
The method of the plating metal level is electroless plating method, or is aided with electric plating method again for chemical plating.
The metal layer thickness scope is 0.01mm~5mm.
For the present invention by increasing the easy conductive coat of metal in charcoal bowl surface, the steel-charcoal connection for improving aluminium electrolysis anode is bad
Situation, realize and reduce carbon block-metal contact resistance, reduce anode drop, reduce power consumption.
Anode carbon block is determined that it is above loose structure that it, which is organized microcosmic, and carbon block surface by its raw material and roasting processing technology
The presence of upper hole, prevent it when being connected with other materials from fully, completely contacting, carbon block and steel in aluminium electrolysis anode
Pawl is connected by the charcoal bowl structure casting phosphorus pig iron, and carbon block-metal joint face there is this problem, due to the contact of microcosmic point
It is bad cause this connecting portion resistance it is larger, so as to causing higher pressure drop and electric energy loss in electrolysis production, it is reported that,
Aluminium electrolysis anode steel-charcoal contact drop reaches 80~160mV, therefore the contact situation for improving charcoal bowl-metal is extremely important.This hair
It is bright first to add the coat of metal of one layer of easy conductive in charcoal bowl surface using the known technology method such as chemical plating, make original hole compared with
Big charcoal top layer turns into the metal level of compact structure, because metal level electric conductivity is excellent, and metal and metal same type of material
Binding ability is more preferable, and when being connected again by normal process with steel pawl by phosphorus pig iron casting, the contact situation of carbon block-metal obtains
Larger improvement, steel-charcoal connection is more fully close, so that contact resistance reduces, pressure drop and energy consumption also decrease.
The structures and methods provided by the invention for reducing aluminium electrolysis anode steel-charcoal pressure drop, can be effectively improved aluminium electrolysis anode
Middle carbon block is connected bad situation with metal, steel pawl is connected with carbon block more fully close, reduces contact resistance, realizing reduces
Anode steel-charcoal pressure drop, reduce power consumption.It is average at least to reduce anode steel-charcoal pressure drop using structures and methods provided by the invention
20mV, so as to be effectively reduced a ton aluminium power consumption.
Brief description of the drawings
Fig. 1 is aluminum electrolysis anode carbon block, steel pawl attachment structure schematic diagram；
Fig. 2 is to amplify partial schematic sectional view after increasing the coat of metal.
In figure, 1 it is steel pawl, 2 is phosphorus pig iron ring, 3 is carbon block, 4 is the coat of metal.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Embodiment 1：
A kind of structure for reducing aluminium electrolysis anode steel-charcoal pressure drop, including steel pawl 1, phosphorus pig iron ring 2, anode carbon block 3, carbon block
Upper to have cylindrical charcoal bowl, the pawl head of steel pawl 1 is inserted in charcoal bowl, is casting phosphorus pig iron ring 2 between pawl head and charcoal bowl circumferential weld.Its feature exists
There is copper coating 4 in the charcoal bowl surface of carbon block 3 with steel pawl 1, the contact of the phosphorus pig iron 2, copper coating thickness is 0.02mm, referring to Fig. 1,
2。
The structure realizes that a kind of method for reducing aluminium electrolysis anode steel-charcoal pressure drop is electric in aluminium by the following method
During solving anode assembling, the pre- plating such as activated, sensitization of charcoal bowl surface first to anode carbon block 3, plated using conventional chemical
Copper method obtains about 0.02mm copper coating in charcoal bowl surface, is then linked together again with steel pawl with phosphorus pig iron casting, treats group
Electrolysis groove uses after dressing up new anode.
Because charcoal bowl surface with the addition of the copper coating of one layer of easy conductive, the larger charcoal top layer of original hole is set to be caused as structure
Close metal level, copper coating electric conductivity is excellent, and the binding ability of metal same type of material is more preferable, is poured with steel pawl by the phosphorus pig iron
During casting connection, the contact situation of carbon block-metal is greatly improved, and steel-charcoal connection is more fully close, and contact resistance reduces,
Pressure drop and energy consumption also decrease.By testing inspection, using the present embodiment structures and methods, anode steel-charcoal can be averagely reduced
Pressure drop about 25mV.
Embodiment 2
A kind of structure for reducing aluminium electrolysis anode steel-charcoal pressure drop, including steel pawl 1, phosphorus pig iron ring 2, anode carbon block 3, carbon block
Upper to have cylindrical charcoal bowl, the pawl head of steel pawl 1 is inserted in charcoal bowl, is casting phosphorus pig iron ring 2 between pawl head and charcoal bowl circumferential weld.Its feature exists
There is copper coating 4 in the charcoal bowl surface of carbon block 3 with steel pawl 1, the contact of the phosphorus pig iron 2, copper coating thickness is 4.5mm, referring to Fig. 1,
2。
The structure realizes that a kind of method for reducing aluminium electrolysis anode steel-charcoal pressure drop is electric in aluminium by the following method
During solving anode assembling, the pre- plating such as activated, sensitization of charcoal bowl surface first to anode carbon block 3, plated using conventional chemical
Copper method obtains about 0.01mm copper coating in charcoal bowl surface, is further continued for being aided with electro-plating method and thickeies copper coating and arrives about 4.5mm,
Then linked together again with steel pawl with phosphorus pig iron casting, it is to be assembled to be used into electrolysis groove after new anode.
Because charcoal bowl surface with the addition of the copper coating of easy conductive, the larger charcoal top layer of original hole is set to turn into compact structure
Metal level, copper coating electric conductivity is excellent, and the binding ability of metal same type of material is more preferable, is connected with steel pawl by phosphorus pig iron casting
When connecing, the contact situation of carbon block-metal is greatly improved, and steel-charcoal connection is more fully close, and contact resistance reduces, pressure drop
Also decreased with energy consumption.By testing inspection, using the present embodiment structures and methods, anode steel-charcoal pressure drop can be averagely reduced
About 60mV.
Embodiment 3
A kind of structure for reducing aluminium electrolysis anode steel-charcoal pressure drop, including steel pawl 1, phosphorus pig iron ring 2, anode carbon block 3, carbon block
Upper to have cylindrical charcoal bowl, the pawl head of steel pawl 1 is inserted in charcoal bowl, is casting phosphorus pig iron ring 2 between pawl head and charcoal bowl circumferential weld.Its feature exists
There is copper coating 4 in the charcoal bowl surface with steel pawl 1, the carbon block 3 of the contact of the phosphorus pig iron 2, copper coating thickness is 1mm, referring to Fig. 1,2.
The structure realizes that a kind of method for reducing aluminium electrolysis anode steel-charcoal pressure drop is electric in aluminium by the following method
During solving anode assembling, the pre- plating such as activated, sensitization of charcoal bowl surface first to anode carbon block 3, plated using conventional chemical
Copper method obtains about 0.01mm copper coating in charcoal bowl surface, continues to thicken copper coating using electro-plating method and arrives about 1mm, then
Linked together again with steel pawl with phosphorus pig iron casting, it is to be assembled to be used into electrolysis groove after new anode.
Because charcoal bowl surface with the addition of the copper coating of easy conductive, the larger charcoal top layer of original hole is set to turn into compact structure
Metal level, copper coating electric conductivity is excellent, and the binding ability of metal same type of material is more preferable, is connected with steel pawl by phosphorus pig iron casting
When connecing, the contact situation of carbon block-metal is greatly improved, and steel-charcoal connection is more fully close, and contact resistance reduces, pressure drop
Also decreased with energy consumption.By testing inspection, using the present embodiment structures and methods, anode steel-charcoal pressure drop can be averagely reduced
About 30mV.
Embodiment 4：
A kind of structure for reducing aluminium electrolysis anode steel-charcoal pressure drop, including steel pawl 1, phosphorus pig iron ring 2, anode carbon block 3, carbon block
Upper to have cylindrical charcoal bowl, the pawl head of steel pawl 1 is inserted in charcoal bowl, is casting phosphorus pig iron ring 2 between pawl head and charcoal bowl circumferential weld.Its feature exists
There is silvering 4 in the charcoal bowl surface of carbon block 3 with steel pawl 1, the contact of the phosphorus pig iron 2, silvering thickness is 0.01mm, referring to Fig. 1,
2。
The structure realizes that a kind of method for reducing aluminium electrolysis anode steel-charcoal pressure drop is electric in aluminium by the following method
During solving anode assembling, the pre- plating such as activated, sensitization of charcoal bowl surface first to anode carbon block 3, plated using conventional chemical
Silver-colored method obtains about 0.01mm silvering in charcoal bowl surface, is then linked together again with steel pawl with phosphorus pig iron casting, treats group
Electrolysis groove uses after dressing up new anode.
Because charcoal bowl surface with the addition of the silvering of one layer of easy conductive, the larger charcoal top layer of original hole is set to be caused as structure
Close metal level, silvering electric conductivity is excellent, and the binding ability of metal same type of material is more preferable, is poured with steel pawl by the phosphorus pig iron
During casting connection, the contact situation of carbon block-metal is greatly improved, and steel-charcoal connection is more fully close, and contact resistance reduces,
Pressure drop and energy consumption also decrease.By testing inspection, using the present embodiment structures and methods, anode steel-charcoal can be averagely reduced
Pressure drop about 22mV.
Embodiment 5：
A kind of structure for reducing aluminium electrolysis anode steel-charcoal pressure drop, including steel pawl 1, phosphorus pig iron ring 2, anode carbon block 3, carbon block
Upper to have cylindrical charcoal bowl, the pawl head of steel pawl 1 is inserted in charcoal bowl, is casting phosphorus pig iron ring 2 between pawl head and charcoal bowl circumferential weld.Its feature exists
There is nickel coating 4 in the charcoal bowl surface with steel pawl 1, the carbon block 3 of the contact of the phosphorus pig iron 2, nickel coating thickness is 2mm, referring to Fig. 1,2.
The structure realizes that a kind of method for reducing aluminium electrolysis anode steel-charcoal pressure drop is electric in aluminium by the following method
During solving anode assembling, the pre- plating such as activated, sensitization of charcoal bowl surface first to anode carbon block 3, plated using conventional chemical
Nickel method obtains about 0.01mm nickel coating in charcoal bowl surface, continues to thicken nickel coating using electro-plating method and arrives about 2mm, then
Linked together again with steel pawl with phosphorus pig iron casting, it is to be assembled to be used into electrolysis groove after new anode.
Because charcoal bowl surface with the addition of the nickel coating of easy conductive, the larger charcoal top layer of original hole is set to turn into compact structure
Metal level, nickel coating electric conductivity is excellent, and the binding ability of metal same type of material is more preferable, is connected with steel pawl by phosphorus pig iron casting
When connecing, the contact situation of carbon block-metal is greatly improved, and steel-charcoal connection is more fully close, and contact resistance reduces, pressure drop
Also decreased with energy consumption.By testing inspection, using the present embodiment structures and methods, anode steel-charcoal pressure drop can be averagely reduced
About 30mV.
Claims (5)
1. a kind of structure for reducing aluminium electrolysis anode steel-charcoal pressure drop, including anode steel claw, phosphorus pig iron ring, carbon block, have in carbon block
Cylindrical charcoal bowl, steel pawl pawl head are inserted in charcoal bowl, are casting phosphorus pig iron ring between pawl head and charcoal bowl circumferential weld, it is characterised in that and steel
Pawl, the charcoal bowl surface of phosphorus pig iron contact are coated with the easy conductive coat of metal.
A kind of 2. structure for reducing aluminium electrolysis anode steel-charcoal pressure drop according to claim 1, it is characterised in that the gold
Category coating is copper, nickel, one kind of silver.
A kind of 3. structure for reducing aluminium electrolysis anode steel-charcoal pressure drop according to claim 1, it is characterised in that the gold
It is 0.01mm~5mm to belong to thickness of coating scope.
4. a kind of realize the method that aluminium electrolysis anode steel-charcoal pressure drop is reduced described in claims 1 to 3, it is characterised in that in aluminium electricity
During solving anode assembling, first to the coat of metal of charcoal bowl surface one layer of easy conductive of plating of anode carbon block, then again with steel pawl
Linked together with phosphorus pig iron casting, it is to be assembled to be used into electrolysis groove after new anode.
5. the method for aluminium electrolysis anode steel-charcoal pressure drop is reduced according to claim 4, it is characterised in that the plating metal
The method of layer is electroless plating method, or is aided with electric plating method again for chemical plating.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111809203A (en) * | 2020-07-21 | 2020-10-23 | 兰州理工大学 | Pretreatment method of pressure-dephosphorized pig iron ring |
| CN114178506A (en) * | 2021-12-03 | 2022-03-15 | 内蒙古大唐国际呼和浩特铝电有限责任公司 | Method for improving finished product anode casting qualification rate |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109898100B (en) * | 2019-04-22 | 2020-07-03 | 贵州铝城铝业原材料研究发展有限公司 | Prebaked continuous independent reinforced carbon bowl anode carbon block structure and preparation method thereof |
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