WO2016108726A1 - Cover for an electrolysis cell for producing aluminium - Google Patents
Cover for an electrolysis cell for producing aluminium Download PDFInfo
- Publication number
- WO2016108726A1 WO2016108726A1 PCT/RU2015/000716 RU2015000716W WO2016108726A1 WO 2016108726 A1 WO2016108726 A1 WO 2016108726A1 RU 2015000716 W RU2015000716 W RU 2015000716W WO 2016108726 A1 WO2016108726 A1 WO 2016108726A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shelter
- central
- cover
- sections
- peripheral
- Prior art date
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
Definitions
- the invention relates to non-ferrous metallurgy, in particular to the electrolytic production of aluminum, and in particular to a structural element for sheltering the space above the melt of the electrolyzer for the production of aluminum by electrolysis of cryolite-alumina melts.
- the most important determinant of the efficiency of the cell is the tightness of the shelter above the melt.
- the tightness of the shelter of the electrolyzer is directly related to the cost of production of aluminum, due to the impact on the heat and energy balance, consumption of raw materials, and ecology.
- the main purpose of the primary shelter of the cell is the main purpose of the primary shelter of the cell:
- cryolite-alumina crust for sheltering the working space of an electrolyzer with inert anodes is three times more than a conventional bath.
- the cryolite-alumina crust cannot provide sealing of the electrolyzer over such a large area, due to the strength, porous structure, ongoing chemical reactions, and instability of the surface integrity.
- This patent is aimed, as noted in the description, to solve the problems of sealing the space of the side-anode of a cell with a self-baking anode, in particular, replacing the existing cryolite-alumina shelter consisting of a cast-iron (steel) gas-collecting bell and cryolite-alumina crust with “artificial” shelter.
- the proposed “artificial” shelter is made entirely or in a combined form of refractory concrete of the following composition: 15-30 wt.% Hydraulic concrete, 5-10 wt.% Microsilica, 65-80 wt.% Alumina.
- the shelter material is in contact with the vapor-gas phase of the electrolyzer, containing not only fluorine and sulfur-containing compounds, according to the patent.
- Material for the cell cover must be cor- rozionostoykim in paragazovoy phase electrolysis comprising a fluorine compound, in the presence of sulfur oxidizing CO, C0 2, 0 2, HF which will cover Vat
- the use in electrolyzers with Soderberg anode, and an inert GOVERNMENTAL prebaked anodes.
- the material proposed in the patent is not completely inert and is impregnated with electrolyte vapor during operation, due to the porosity of the material. During the impregnation of concrete, crystalline and cement bonds are destroyed, which leads to the destruction of the product.
- the invention relates to structural elements of a shelter and a power system for aluminum electrolysis cells, in particular, the issue of creating an insulating shelter above an electrolyte of an aluminum electrolysis cell when operating at low temperatures is considered.
- One of the conditions of the production technology is the formation of a gel-like layer on the surface of the electrolyte, which is ensured by isolating the surface of the electrolyte with the construction artificial ”shelter with high thermal insulation properties.
- the electrolyzer shelter consists of a central section located in the central span, between the anodes, along the entire length of the bath.
- the central section of the shelter is fixed on the flue beam in a fixed movement, can consist of several sections, the course of the shelter is not provided.
- the lateral sections of the shelter of the electrolyzer are movable, can be made in the form of several side sections, each moves independently from each other and from the central shelter.
- the shelter of the cell is made of ceramic material (for example, alumina).
- the central section of the shelter does not have the ability to change its position and the method of dismantling without changing the working position of the anodes. Also, before dismantling the central section, alumina feeders must be dismantled.
- the design of the peripheral and central shelter involves lifting and replacing the shelter without disturbing the horizontal position of the anodes, in other words, the impact on the shelter will not affect the stability of the current load. It is proposed to use materials resistant to the atmosphere of oxygen and fluorides, for example, ceramics or composite materials from a framework based on nickel-titanium alloys and a heat insulator, as a shelter material.
- This “artificial” shelter device is structurally not universal for use in electrolyzers with baked anodes and Soderberg anodes.
- the central shelter has a mount that allows the shelter to be moved independently of the anodes; it does not allow the shelter to be replaced without affecting the anodes and the stability of the electrolytic cell in case of failure.
- the shelter material we can talk about the necessary bridges for periodic replacement of shelter sections. Another significant drawback is the shelter material:
- the objective of the invention is to provide a universal sectional “artificial” shelter above the electrolyte melt in electrolyzers with an inert, calcined anode and Soderberg anode, corrosion-resistant and erosion-resistant electrolytic cells in an aggressive vapor-gas environment.
- the technical result of the claimed invention is to ensure the tightness of the shelter, reliability and safety of the structure, reducing energy consumption.
- the technical result is achieved by the fact that in the shelter of the electrolyzer for aluminum production, in contact with the vapor-gas phase during the operation of the electrolyzer, made in the form of central and peripheral sections installed with the possibility of movement relative to each other, the central and peripheral sections are made of corrosion-resistant and erosion-resistant material containing 80.0 - 99.0 wt.% fluorophlogopite and 20.0 - 1.0 wt.% refractory filler.
- the central sections of the shelter can be rigidly fixed on each anode rod, and the peripheral sections can be made in the form of convex flaps, rigidly fixed on the upper surface of the cathode with the possibility of removal and resting on the central section of the shelter.
- the following chemical compounds can be used as a refractory filler: clay, calcium fluoride, rutile, aluminosilicate sodium, fluoroapophilite, nephiline, olivine, magnesium fluoride, spinel.
- a sealant layer in the form of an alumina layer may be applied to the end and side junctions of the central and peripheral shelters; in addition, holes can be made on the central section of the shelter.
- Shelter is made in the form of bulky plate-shaped products ( Figure 1).
- Shelter is located above the upper surface of the anode so as not to come into contact with the molten electrolyte and consists of sections.
- One full section of the shelter consists of a central section 1 and a peripheral 2.
- the central section 1 of the shelter is mounted directly on the anode rod using projections, and the distance from the surface of the shelter to the electrolyte melt is selected based on the type and technological parameters of the electrolyzer. The selected distance is maintained taking into account the possibility of short-term effects of electrolyte spills on the working surface of the shelter, when changing the pole distance of the cell.
- holes for alumina dispensers are made, located according to the electrolyzer power card.
- the peripheral section 2 of the shelter is arranged in such a way that one side rests on the central section of the shelter, and the second side rests on the upper surface of the cathode (such as a flange, edge, lining).
- the peripheral section is equal in width to the central section and has the shape of a parabola, which allows you to quickly remove the shelter from the bath, for technological operations.
- the central and peripheral sections of the shelter form a shelter section of one anode along the blind or front side, and the number of shelter sections corresponds to the number of anodes. Any section of the shelter moves with the anode and can change its position independently of the adjacent sections of the shelter and neighboring anodes.
- the electrolyzer’s shelter is in constant contact with the gas-air medium of the electrolyzer and periodically in contact with the electrolyte melt; therefore, it is made of corrosion-resistant and erosion-resistant material that is resistant in the aggressive vapor-gas medium of the electrolytic cell with baked b self-baking or inert anodes.
- the used shelter material is not subjected to impregnation and wetting with cryolite-alumina melt. Fluorophlogopite or alumina suspensions can be used as material for the manufacture of shelters. Independent movement of the shelter provides sealing of the working space of the cell with inert anodes, simplicity and mobility of technological operations. Any section of the shelter can be dismantled independently of the others, replacing it with a new product.
- fluorophlogopite As a shelter material is the chemical composition of the agglomerate according to the main component KMg 3 (Si 3 Al) OioF 2 *, since the physicochemical properties of the material change, and the mechanical strength, thermal conductivity and corrosion-, erosion- resistance of the material.
- fluoroflogopit material As a shelter, it is necessary to use a material with the content of the main component of fluorophlogopit in the range of 80-99%, which ensures the universality of the use of materials for various types of electrolyzers.
- fluoroflogopite ensures the purity of the melt and aluminum.
- the presence of structural technological holes in the central section of the shelter ensures the technological applicability of the shelter for powering the electrolyzer, dismantling and installing the shelter, and carrying out technological operations.
- Alumina is used as a seal for the joints of the shelter sections, which has a separate chemical affinity for the material fluorophlogopite.
- the presence of through technological holes at the ends of the central section of the shelter in the region of the center of the electrolyzer provides the removal of the gas-air mixture of the electrolyzer to the gas removal system.
- Preparation of the electrolyzer with the claimed shelter is as follows: Central and peripheral sections of the shelter are made from machining blanks by machining. Further, in the obtained sections, according to the marking of the location and positioning in the electrolyzer, the required holes are cut out. Then, the shelter sections are placed on the installed or installed anodes, in the following sequence: the central section, then the peripheral one. Shelter from fluoroflogopite material can be put into an active electrolyzer, since the material is resistant to thermal shock.
- the electrolyser shelter is characterized by increased reliability, provided not only by the corrosion and erosion resistance of the shelter material, but also by the independent structural feature of the section shelter, which allows access to any part of the electrolyzer in the shortest time without significant interference with the technological process. Also, the properties of the material exclude the thermal expansion of the shelter material, which will allow the shelter to move freely along adjacent shelters.
- the simplicity of manufacturing the proposed shelter is due to the ease of processing of the proposed shelter material (fluoroflogopite), the simplicity of the fastening system on the anode rod, which allows using the strength of the product and the shape of the fastener platform by supporting the central shelter to ensure the section is operational.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2972640A CA2972640A1 (en) | 2014-12-29 | 2015-10-28 | Cover for an electrolysis cell for producing aluminium |
EP15875779.9A EP3241927A4 (en) | 2014-12-29 | 2015-10-28 | Cover for an electrolysis cell for producing aluminium |
AU2015372636A AU2015372636A1 (en) | 2014-12-29 | 2015-10-28 | Cover for an electrolysis cell for producing aluminium |
CN201580074469.2A CN107532318A (en) | 2014-12-29 | 2015-10-28 | For the groove lid for the electrolytic cell for producing aluminium |
US15/540,535 US20170362726A1 (en) | 2014-12-29 | 2015-10-28 | Cover for an electrolysis cell for procuding aluminium |
Applications Claiming Priority (2)
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 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016108726A1 true WO2016108726A1 (en) | 2016-07-07 |
Family
ID=55794460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2015/000716 WO2016108726A1 (en) | 2014-12-29 | 2015-10-28 | Cover for an electrolysis 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 |
Citations (5)
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---|---|---|---|---|
US5582695A (en) * | 1992-11-30 | 1996-12-10 | Elkem Aluminium Ans | Structural parts for electrolytic reduction cells for aluminum |
US20050230265A1 (en) * | 2002-06-04 | 2005-10-20 | Vittorio De Nora | Aluminium electrowinning cell design with movable insulating cover sections |
US20060124471A1 (en) * | 2002-12-04 | 2006-06-15 | Nguyen Thinh T | Electrolytic cell with improved feed device |
RU2361017C2 (en) * | 2007-05-23 | 2009-07-10 | Закрытое акционерное общество "УНИХИМТЕК" (ЗАО "УНИХИМТЕК") | Protective composition, composition material on its basis for secondary covering of cell and method of material's manufacturing |
RU2375504C2 (en) * | 2007-12-11 | 2009-12-10 | Общество с ограниченной ответственностью "Русская инжиниринговая компания" | Covering of aluminium electrolytic cell with self-burnt anode and top current contact jaw |
Family Cites Families (20)
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SU274933A1 (en) * | 1969-04-21 | 1977-12-05 | Sprygin A I | Method of protection of magnesium electrolyzer lining from electrochemical destruction |
NO172250C (en) * | 1990-05-07 | 1993-06-23 | Elkem Aluminium | DEVICE FOR CLOSING THE ANODETOPE ON A SODER BERGANODEI AN ELECTROLYCLE CELL FOR ALUMINUM PRODUCTION |
FR2694945B1 (en) * | 1992-08-20 | 1994-10-07 | Pechiney Aluminium | Very high intensity electrolytic cell superstructure for aluminum production. |
AU8031298A (en) * | 1997-07-08 | 1999-02-08 | Moltech Invent S.A. | Aluminium production cell design |
CN2479028Y (en) * | 2001-05-28 | 2002-02-27 | 郑州轻金属研究院沁阳铝电解试验厂 | Drawer-type cell cover plate |
CN2641063Y (en) * | 2003-06-13 | 2004-09-15 | 沈阳铝镁设计研究院 | Side sealing cover plate of electrolyzer |
RU2288976C1 (en) * | 2005-05-04 | 2006-12-10 | Общество с ограниченной ответственностью "Инженерно-технологический центр" | Module-type bus arrangement of aluminum producing electrolyzers |
RU2316618C2 (en) * | 2006-02-16 | 2008-02-10 | Открытое акционерное общество "РУСАЛ ВСЕРОССИЙСКИЙ АЛЮМИНИЕВО-МАГНИЕВЫЙ ИНСТИТУТ" (ОАО "РУСАЛ ВАМИ") | Electrolyzer for producing magnesium and chlorine |
CN101280435A (en) * | 2008-05-27 | 2008-10-08 | 东北大学设计研究院(有限公司) | 400kA level energy-saving emission-reduced prebaking aluminum cell |
CN201358313Y (en) * | 2009-03-09 | 2009-12-09 | 高德金 | Novel aluminum electrolytic cell gas-shield groove cover plate insulating structure |
WO2012021924A1 (en) * | 2010-08-16 | 2012-02-23 | Aluminium Smelter Developments Pty Ltd | Rodless anode cassette |
CN201809455U (en) * | 2010-08-18 | 2011-04-27 | 中国铝业股份有限公司 | Sealing device for cover plate of aluminum electrolysis cell |
CN202000002U (en) * | 2011-03-24 | 2011-10-05 | 运城市关铝设备材料有限公司 | Novel anticorrosion and anti-deformation heat preserving seal groove cover for electrolysis bath |
CN202246906U (en) * | 2011-09-15 | 2012-05-30 | 高德金 | Cover plate without insulating groove for aluminum electrolytic cell |
CN202881410U (en) * | 2012-10-18 | 2013-04-17 | 郑州龙祥铝业有限公司 | Electrolytic cell and device for sealing shell breaking hammer and horizontal cover thereof |
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 |
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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 |
-
2014
- 2014-12-29 RU RU2014154035/02A patent/RU2582421C1/en active
-
2015
- 2015-10-28 CN CN201580074469.2A patent/CN107532318A/en active Pending
- 2015-10-28 EP EP15875779.9A patent/EP3241927A4/en not_active Withdrawn
- 2015-10-28 CA CA2972640A patent/CA2972640A1/en not_active Abandoned
- 2015-10-28 US US15/540,535 patent/US20170362726A1/en not_active Abandoned
- 2015-10-28 WO PCT/RU2015/000716 patent/WO2016108726A1/en active Application Filing
- 2015-10-28 AU AU2015372636A patent/AU2015372636A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5582695A (en) * | 1992-11-30 | 1996-12-10 | Elkem Aluminium Ans | Structural parts for electrolytic reduction cells for aluminum |
US20050230265A1 (en) * | 2002-06-04 | 2005-10-20 | Vittorio De Nora | Aluminium electrowinning cell design with movable insulating cover sections |
US20060124471A1 (en) * | 2002-12-04 | 2006-06-15 | Nguyen Thinh T | Electrolytic cell with improved feed device |
RU2361017C2 (en) * | 2007-05-23 | 2009-07-10 | Закрытое акционерное общество "УНИХИМТЕК" (ЗАО "УНИХИМТЕК") | Protective composition, composition material on its basis for secondary covering of cell and method of material's manufacturing |
RU2375504C2 (en) * | 2007-12-11 | 2009-12-10 | Общество с ограниченной ответственностью "Русская инжиниринговая компания" | Covering of aluminium electrolytic cell with self-burnt anode and top current contact jaw |
Non-Patent Citations (1)
Title |
---|
See also references of EP3241927A4 * |
Also Published As
Publication number | Publication date |
---|---|
AU2015372636A1 (en) | 2017-08-17 |
CA2972640A1 (en) | 2016-07-07 |
CN107532318A (en) | 2018-01-02 |
EP3241927A1 (en) | 2017-11-08 |
EP3241927A4 (en) | 2018-11-14 |
RU2582421C1 (en) | 2016-04-27 |
US20170362726A1 (en) | 2017-12-21 |
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