CN107532318A - For the groove lid for the electrolytic cell for producing aluminium - Google Patents
For the groove lid for the electrolytic cell for producing aluminium Download PDFInfo
- Publication number
- CN107532318A CN107532318A CN201580074469.2A CN201580074469A CN107532318A CN 107532318 A CN107532318 A CN 107532318A CN 201580074469 A CN201580074469 A CN 201580074469A CN 107532318 A CN107532318 A CN 107532318A
- Authority
- CN
- China
- Prior art keywords
- groove lid
- electrolytic cell
- weight
- central segment
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C25C3/10—External supporting frames or structures
-
- 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
- C25C3/22—Collecting emitted gases
Abstract
The present invention relates to non-ferrous metal metallurgy, more particularly to by electrolytic production of aluminum, it is more particularly related to cover the structural detail by being electrolysed melt superjacent air space in the electrolytic cell of cryolite alumina melt production aluminium.The groove lid of the electrolytic cell for producing aluminium of the present invention is in contact in the electrolytic cell operation with steam, and it is the multiple central segments and the form of multiple peripheral members being movably arranged relative to each other, the central segment and peripheral members are made up of corrosion-resistant and erosion resistant material, and the material includes the fire resistant infilling of the weight % of 80.0 weight %~99.0 fluorophologopite and the weight % of 20.0 weight %~1.0.Each central segment of the groove lid can be permanently affixed on each anode stub, and each peripheral members can be configured to rigidity and be removably mounted in the protrusive board of the central segment support on negative electrode top surface and by the groove lid.In addition, the fire resistant infilling may be selected from following chemical substance：Clay, calcirm-fluoride, rutile, sodium silicoaluminate, fluorine fish-eye stone, nepheline, olivine, magnesium fluoride and spinelle.The end and side join of center and peripheral groove lid can be coated with the sealant layer of alumina layer form, and the central segment of groove lid may be provided with hole.The groove lid of sealing, reliable and safety structure, and the energy consumption reduced can be provided using the present invention.
Description
The present invention relates to non-ferrous metal metallurgy, more particularly to by electrolytic production of aluminum, it is more particularly related to cover
The structural detail of melt superjacent air space in the electrolytic cell of aluminium is produced by being electrolysed Cryolite-alumina Melt.
The most important factor for limiting cell performance is the sealing of the groove lid above melt.The sealing of electrolytic cell groove lid with
Aluminium production cost is directly related, is influenceed because it has on heat and energy balance, consumption of raw materials and environment.
Main electrolytic cell groove lid has following main purpose：
1) it provides heat balance,
2) it minimizes gas discharge,
3) it makes operator scheme stable,
4) it minimizes significant loss.
For the surface area ratio standard for the cryolite-alumina shell for covering the electrolytic cell operation space with inert anode
Groove is three times greater.Due to intensity, loose structure, chemical reaction and the complete unstability in surface, cryolite-alumina shell occurs
Can not on so big surface area sealed electrolytic cell.
In view of above-mentioned factor, it is necessary to using by corrosive atmosphere and gaseous state fluorochemical, melt drop and machinery
Load electrolytic cell of the major trough lid sealing with inert anode made of indefatigable material.This groove lid is it is ensured that relatively low ventilative
Property, integrality, thermal insulation and intensity.The schematic diagram that groove lid material and groove lid are fixed should apply to all types of electrolytic cells.
The United States Patent (USP) 5582695 that known 10 days December in 1996 announces, IPC C04B 7/32, C04B 14/04, C04B
14/02,C04B 14/30.The invention is related to the structural detail of the aluminium cell contacted with gas phase, and specifically, it is related to groove lid
And anode casing.As disclosed in the description, the purpose of the patent is that solve the electricity with self-baking (self-baking) anode
The space sealing problem between the side plate and anode of groove is solved, specifically, it is related to is replaced with " emulation (artificial) " groove lid
Change the existing cryolite-alumina groove lid being made up of cast iron (steel) gas collection bell (bell) and cryolite-alumina shell.
" emulation " groove lid proposed may be made in single-piece or sub-assembly made of with the following refractory concrete formed：15 weights
Measure the weight % of the weight % of %~30 concrete for hydraulic structure, 5 weight %~10 fine silicon dioxide and the weight of 65 weight %~80
Measure % aluminum oxide.
This scheme has following major defect：
According to the patent, during operation, groove lid material and the electrolytic cell steam for not only including fluorine-containing and sulphur compound
It is in contact.The groove lid material of electrolytic cell must be in oxidant С О, С О2、О2, in the presence of HF to containing fluorine and sulphur compound
Electrolytic cell gas phase there is corrosion resistance, this can use be used for have Soderberg anodes and support (backed) inertia
The groove lid of the electrolytic cell of anode.The material proposed is not completely inert, and during operation, due to material porous,
The material is soaked by electrolyte vapor.When concrete is soaked, crystal and concrete border are destroyed, and cause product to be ruined
It is bad.
Additionally, it is known that in the С 3/14 of U.S. Patent number 2006124471 А 1, IPC С 25 that on June 15th, 2006 announces
Structure electrolysis groove covering method.The invention is related to the groove lid of aluminium cell and the structural detail of supply system, specifically,
It is related under low-temperature operation the formation sealing groove lid above the electrolyte of aluminium cell.One of condition of the manufacturing technology be
Gelatinous layer is formed on bath surface, its by using thermal insulation strengthen " emulation " groove lid structure isolation bath surface and
There is provided.Electrolytic cell groove lid is by central segment group into the central segment is arranged on empty along the center between the anode of the whole length of groove
Between.The central segment of groove lid is fixed on gas tubing string, fixed, it may include if stem portion, does not contemplate groove lid movement.Electrolytic cell
The sidepiece of groove lid is moveable, can be provided in the form of multiple sidepieces, and it can be independently moved each other or with center groove lid.Electricity
Solution groove groove lid is made up of ceramic material (such as aluminum oxide).
The program has following major defect：
The central segment of groove lid is unsuitable for changing the position of its own, and method for dismounting can only be in the case where changing the operating position of anode
Carry out.In addition, it is necessary to dismantle aluminum oxide supply before central segment is dismantled.
The shortcomings that another is notable is groove lid material：
- ceramics-may be damaged when being subjected to the temperature difference and mechanical damage.
The U.S. Patent number 2005230265 that known 20 days October in 2005 announces, IPC С 25 С 3/08, В 01D59/
40,В01D59/00,С25С3/00,С25С5/04,С25С7/00.The invention is related to be in contact with the steam of electrolytic cell
Aluminium cell structural detail, in particular to support or inert anode upper part of the electrolytic cell groove lid structure.Should
The purpose of patent is to eliminate the heat loss of electrolytic cell, that is, reduces the heat transfer from groove lid to environment, reduces groove lid and falls to melt
The heat loss of middle decomposition, stablized by thermal balance and keep operating space shape to reduce heat loss.In the patent and previously
In the scheme of description, the form that part can be individually moved in the emulation groove lid for electrolyte melt is made.
Due to its technical specification and the quantity of similar essential characteristic, the known technical scheme is elected as immediate simulation
Thing (prototype).
According to prototype solution, " emulation " the groove lid portion above electrolyte melt is made in the form of suspension structure.It is based on
Their position, groove lid have periphery and center.Peripheral groove lid with can with each other, groove lid central segment and anode be moved away it is outstanding
The form of floating element is made.The groove lid portion of electrolytic cell central space is made in the form of one piece or some sections.Central channel
Cover rim the whole length extension of electrolytic cell；Groove lid portion is fixed by suspension fastener, and can be relative to melt and anode point
Open movement.Center groove lid structure setting has operation door and hole, and therefore, it is possible to carry out production operation, raw material is fed to groove, and with sun
Pole component works together.Periphery and center groove lid are manufactured so that can be in accordance with the lifting that is horizontally disposed and carrying out groove lid of anode
And replacing, in other words, the action of groove lid does not interfere with the stability of current capacity.As groove lid material, it suggests use to oxygen
With the indefatigable material of fluoride, such as the composite of ceramics or the housing based on Nitinol and heat-barrier material.
The program has following major defect：
Should " emulation " groove lid there is identical structure, and be not construed as can be used for have supporting anodes with
Soderberg anodes it is universal.
The fixed form of center groove lid causes groove lid to be moved independently of anode；It is not influenceing anode and electrolytic cell operation
The replacing of failure groove lid is hampered in the case of stability.In view of groove lid portion material, then there is the demand for regularly replacing groove lid portion.
Another significant drawback is groove lid material：
- ceramics-may be damaged when being subjected to the temperature difference and mechanical damage,
- composite-aoxidizes under fluorine oxygen atmosphere.
The purpose of the present invention is the electrolyte melt in the electrolytic cell with inertia supporting anodes and Soderberg anodes
Top provides Multifunction sectional type " emulation " groove lid, and its aggressive steam environment to electrolytic cell shows corrosion-resistant
And erosion resistance (erosion) property (corrosion).
The solution have the advantages that provide the groove lid of sealing, reliable and safe structure and the energy consumption of reduction.
This technique effect realizes that the groove lid is in the electrolytic cell operation by the groove lid of the electrolytic cell for producing aluminium
It is in contact with steam, and multiple central segments and the form of multiple peripheral members to be movably arranged relative to each other, in described
Heart section and peripheral members are made up of corrosion-resistant and erosion resistant material, and the material includes the weight % of 80.0 weight %~99.0 fluorine
The weight % of phlogopite and 20.0 weight %~1.0 fire resistant infilling.
Each central segment of the groove lid can be permanently affixed on each anode stub, and each peripheral members can be configured to it is rigid and removable
The protrusive board for being fixed on negative electrode top surface except ground and being supported by the central segment of the groove lid.In addition, the fire resistant infilling may be selected from
Lower chemical substance：Clay, calcirm-fluoride, rutile, sodium silicoaluminate, fluorine fish-eye stone, nepheline, olivine, magnesium fluoride and spinelle.
The end and side join of center and peripheral groove lid can be coated with the sealant layer of alumina layer form, and groove lid
Central segment may be provided with hole.
Subject of the present invention is as follows：
Groove lid manufactures (Fig. 1) in the form of the flat product of large scale.Groove lid is arranged on the top face of anode so that its
Electrolyte melt is not contacted and is made up of each section.One complete groove lid is made up of central segment 1 and peripheral members 2.In groove lid
Heart section 1 is directly anchored on anode stub by protuberance, and wherein the distance on groove lid surface to electrolyte melt is based on electrolytic cell class
Type and specification are selected.This distance chosen be change anodes in electrolytic cells to negative electrode apart from when of short duration be exposed to groove lid
Electrolyte levels are raised the possibility of (run-up) and made allowances on working surface.Groove lid central segment is provided with for according to electrolysis
The hole of the aluminum oxide distributor of groove feeding scheme arrangement.The installation of groove lid peripheral members 2 causes its side to be supported by groove lid central segment,
And another side supports (such as flange, edge, liner) by the top surface of negative electrode.The width of peripheral members is equal to the width of central segment, and
And be parabolic shape, therefore quickly can remove groove lid from groove, to carry out technical operation.In this way, in groove lid
Heart section and peripheral members define the groove lid section for an anode overleaf or on front, and the quantity of groove lid section corresponds to sun
The quantity of pole.Each groove lid Duan Keyu anodes move together, and it can be independently variable with adjacent groove lid section and adjacent anode certainly
The position of body.The air ambient of electrolytic cell groove lid permanent contact electrolytic cell, and electrolyte melt is periodically contacted, this is groove
The reason for lid is made up of corrosion-resistant and anti-erosion material, its aggressivity to the electrolytic cell with support, self-baking or inert anode
Steam ambient is resistant.The groove lid material used is not soaked and soaked by Cryolite-alumina Melt.Manufactured for groove lid, can
Use fluorophologopite or alumina slurry.The operation that the independent movement of groove lid can seal the electrolytic cell with inert anode is empty
Between, and make technical operation simply variable.Any groove lid Duan Douke independently dismantles with other groove lid sections, and with new part replacement.
One factor of the difference of fluorophologopite groove lid is that key component is KMg3(Si3Al)O10F2* the chemistry of aggregate
Composition, because the change of materials chemistry purity causes the change of Material Physics and chemical property, thus changes its mechanical strength, leads
Hot and corrosion-resistant and abrasion-resistance.When using fluorophologopite as groove lid material, it is necessary to use containing 80%~99%
Key component fluorophologopite material, it can flexibly be used for the flexible material of different type electrolytic cell.Except electrolysis
The sealing of operating space above melt in groove, it is heat-insulated outside, fluorophologopite ensure that the purity of melt and aluminium.In groove lid central segment
Handle hole groove lid can be used to carry out electrolytic cell feeding, groove lid installation and removal and attended operation.In order to seal groove lid section
Junction surface, using aluminum oxide, it is similar in chemistry to fluorophologopite material.The groove lid central segment end being electrolysed in groove center
Operation through hole admixture of gas is removed from electrolytic cell to off gas system.
The preparation section of electrolytic cell with groove lid claimed comprises the following steps：
By the machining blank production center and peripheral groove lid section.Then, the positioning in electrolytic cell and position mark,
Appropriate hole is manufactured in the section of production.Next, these groove lids are placed in the sun installed or installed in the following order
On extremely：It is central segment first, followed by peripheral members.The electricity of (active) can will be placed in work by groove lid made of fluorophologopite
Solve in groove, because this material heat shock resistance.
Improved reliability is characterised by according to the electrolytic cell groove lid of proposed scheme, is not only in that the resistance to of groove lid material
Corrosion and abrasion-resistance, and it is the absolute construction feature of segmented groove lid, enabling electrolytic cell is called in a short time
Any part and do not cause significantly to hinder in the process.Further, since material property and prevent the heat of groove lid material
Expansion, enables groove lid to be moved freely along adjacent groove lid.
By the simplification of fastening system in the processability and anode stub of the groove lid material (fluorophologopite) of the present invention and true
The easiness of proposed groove lid manufacturing process is protected, can be by the shape of product strength and fastening surface and from central channel
The support of lid and ensure section function.
According to the technical scheme proposed, the long term test room of the fluorophologopite groove lid claimed carried out recently and
Bench-scale testing has shown that its feature and efficiency.
Claims (6)
1. a kind of groove lid for being used to produce the electrolytic cell of aluminium, it is in contact in the electrolytic cell operation with steam, and is phase
For the multiple central segments and the form of multiple peripheral members being movably arranged each other, the groove lid is characterised by, the center
Section and peripheral members are made up of corrosion-resistant and erosion resistant material, and the material includes the weight % of 80.0 weight %~99.0 fluorine gold
The weight % of mica and 20.0 weight %~1.0 fire resistant infilling.
2. groove lid as claimed in claim 1, it is characterised in that each central segment of the groove lid is permanently affixed at each anode stub
On.
3. groove lid as claimed in claim 1, it is characterised in that each peripheral members are configured to rigidity and are removably mounted in negative electrode
The protrusive board supported on top surface and by the central segment of the groove lid.
4. groove lid as claimed in claim 1, it is characterised in that the fire resistant infilling may be selected from following chemical substance：Clay, fluorine
Change calcium, rutile, sodium silicoaluminate, fluorine fish-eye stone, nepheline, olivine, magnesium fluoride and spinelle.
5. groove lid as claimed in claim 1, it is characterised in that the end and side join of center and peripheral groove lid are coated with oxidation
The sealant layer of aluminium lamination form.
6. groove lid as claimed in claim 1, it is characterised in that the central segment of the groove lid is provided with hole.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2014154035 | 2014-12-29 | ||
| RU2014154035/02A RU2582421C1 (en) | 2014-12-29 | 2014-12-29 | Cover of electrolyser for aluminium production |
| PCT/RU2015/000716 WO2016108726A1 (en) | 2014-12-29 | 2015-10-28 | Cover for an electrolysis cell for producing aluminium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107532318A true CN107532318A (en) | 2018-01-02 |
Family
ID=55794460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580074469.2A Pending CN107532318A (en) | 2014-12-29 | 2015-10-28 | For the groove lid for the electrolytic cell for producing aluminium |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20170362726A1 (en) |
| EP (1) | EP3241927A4 (en) |
| CN (1) | CN107532318A (en) |
| AU (1) | AU2015372636A1 (en) |
| CA (1) | CA2972640A1 (en) |
| RU (1) | RU2582421C1 (en) |
| WO (1) | WO2016108726A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2698162C2 (en) | 2017-03-01 | 2019-08-22 | Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" | Perforated metal inert anode for aluminium production by molten electrolysis |
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| CN203360593U (en) * | 2013-05-08 | 2013-12-25 | 戴军 | Energy-saving, thermal-insulating and high-strength sealed cell cover of aluminum reduction cell |
| CN203700545U (en) * | 2013-12-05 | 2014-07-09 | 贵州新峰机电设备有限公司 | Hermetical tank hood of insulating electrolytic bath |
| CN203890450U (en) * | 2014-05-22 | 2014-10-22 | 扬州八方机电设备有限公司 | Novel energy-saving cover plate for electrolytic aluminum bath |
| CN204039517U (en) * | 2014-07-01 | 2014-12-24 | 湖州市织里新飞铝业有限公司 | A kind of aluminium cell mulch resistance material device |
| CN204370001U (en) * | 2014-12-24 | 2015-06-03 | 陕西银仕达信息科技有限公司 | Novel heat-preserving energy-saving electrolgtic aluminium groove cover |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3241927A1 (en) | 2017-11-08 |
| RU2582421C1 (en) | 2016-04-27 |
| WO2016108726A1 (en) | 2016-07-07 |
| EP3241927A4 (en) | 2018-11-14 |
| AU2015372636A1 (en) | 2017-08-17 |
| CA2972640A1 (en) | 2016-07-07 |
| US20170362726A1 (en) | 2017-12-21 |
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