US20200010968A1 - Modular busbar for series of aluminium electrolyzers - Google Patents

Modular busbar for series of aluminium electrolyzers Download PDF

Info

Publication number
US20200010968A1
US20200010968A1 US16/484,453 US201816484453A US2020010968A1 US 20200010968 A1 US20200010968 A1 US 20200010968A1 US 201816484453 A US201816484453 A US 201816484453A US 2020010968 A1 US2020010968 A1 US 2020010968A1
Authority
US
United States
Prior art keywords
cell
anode
busbars
cathode
electrolysis
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.)
Abandoned
Application number
US16/484,453
Other languages
English (en)
Inventor
Viktor Khrist'yanovich MANN
Vitalij Valer'evich PINGIN
Vitalij Vladimirovich Platonov
Andrej Vasil'evich Zavadyak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rusal Engineering and Technological Center LLC
Original Assignee
Rusal Engineering and Technological Center LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rusal Engineering and Technological Center LLC filed Critical Rusal Engineering and Technological Center LLC
Assigned to OBSHCHESTVO S OGRANICHENNOY OTVETSTVENNOST'YU "OBEDINENNAYA KOMPANIYA RUSAL INZHENERNO-TEKHNOLOGICHESKIY TSENTR" reassignment OBSHCHESTVO S OGRANICHENNOY OTVETSTVENNOST'YU "OBEDINENNAYA KOMPANIYA RUSAL INZHENERNO-TEKHNOLOGICHESKIY TSENTR" ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MANN, Viktor Khrist'yanovich, PINGIN, Vitalij Valer'evich, PLATONOV, Vitalij Vladimirovich, ZAVADYAK, Andrej Vasil'evich
Publication of US20200010968A1 publication Critical patent/US20200010968A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • C25C3/16—Electric current supply devices, e.g. bus bars
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/02—Electrodes; Connections thereof

Definitions

  • the invention relates to aluminum smelting by the method of electrolysis of melted cryolite salts in electrolysis cells (pots) arranged side-by-side in the cell (pot) room.
  • a busbar system is a current-conductive element of an electrolysis cell structure and consists of two parts, anodic and cathodic. Electrolysis cells arranged in rows one after another are coupled with each other by current conductors made of aluminum or copper busbars of different cross-section and connected in an electrical circuit in series: cathode busbars of one cell are connected to anode busbars of another cell. A group of electrolysis cells combined into one electrical circuit is called a potline (or cell line).
  • the anode part of the busbar system comprises flexible straps in a stack (or flexible strap stacks), anode risers and anode buses. The current is transferred from the anode buses to aluminum anode rods, and then to prebaked carbon (anode) blocks.
  • the cathode part of the busbar system comprises flexible straps in stacks (or flexible strap stacks) that drain current from collector bars in the bottom of the cell to main (collecting) cathode buses, and then to cathode buses.
  • busbar system designs for electrolysis cells.
  • a busbar system is developed for a specific electrolysis cell design using computer-based mathematical models (or simulations) and depends on cell type, cell amperage, cell position in the pot (or cell) room and in the potline, the availability of adjacent (or neighboring) pot rooms, local climate, the remoteness of raw materials suppliers, product consumers, and the cost of electricity, raw materials and finished products.
  • Buses in Russia are currently manufactured mainly from A7E grade aluminum having a temperature coefficient of electrical resistance of 0.004. This means that when the bus temperature changes by 10° C., its resistance changes by 4%, which should also be taken into account. In practice, this can be taken into account only roughly, since the temperature of any bus depends not only on the density of current flowing through it (the Joule-Lenz law), but also primarily on its thermal balance that is determined by busbar shape, weight and material, molecular heat dissipation or heating from another thermal source, heat dissipation or generation through radiation, convective heat exchange or the influence of sources of cold;
  • a potline with a busbar system should be reliably insulated from ‘earth’ and from the cathode shell to reduce current leakage.
  • Current leakages not only determine direct current losses, which cannot be used in the process of electrolysis, but also cause the hard-to-remove MHD instability of the melt in electrolysis cells, in those places that are close to current leakages.
  • the anode busbar system is connected with the previous cell by means of risers, where the outermost risers are connected to the outermost main (collecting) cathode busbars of the upstream side of the cell by busbar stacks located along the end faces of the cell and to the main (collecting) cathode busbars of the downstream side of the cell, while the middle risers are connected to the middle main (collecting) busbars of the upstream side of the cell by busbar stacks arranged symmetrically under the cathode blocks being closest to the cell ends and to the main (collecting) cathode busbars of the downstream side of the cell, wherein the busbar extending under the bottom and located closer to an adjacent (or neighboring) row of electrolysis cells carries 15% of the upstream side current, while the other one carries 10% of the upstream side current, and there is an intermediate busbar under the cell bottom that extends halfway between the potline axis and the cell end, on the side opposite to the adjacent (or neighboring) row of electro
  • connection between the cathode busbar system and the anode busbar system of the following cell in a row is made in the form of bus modules composed of two semi-risers, wherein one of the semi-risers is rigidly connected to the downstream main (colleting) cathode busbar that, in turn, is connected to four flexible strap stacks, and another semi-riser is connected by busbars located under the cathode shell bottom and coupled with the upstream (collecting) cathode busbar stacks, each of them being connected to two flexible strap stacks, wherein the connecting busbars are located under the cathode shell bottom in parallel to the transversal axis of the electrolysis cell and each other, while the current supplied to the correction (compensation) loop is supplied in the direction coincident with the current direction in the potline, and the current in the magnetic field correction (compensation) loops is preferably 20-70% of the potline amperage (patent FR 2583069, PECHINEY ALUMINIUM, 1986 Dec
  • correction (compensation) circuit leads to an increase in the busbar system weight, growth in power consumption due to a voltage drop in the correction (compensation) circuit (loop), and an increase in expenditures on the floor space for the installation of the correction (compensation) circuit (loop).
  • correction (compensation) busbars will be composed of 16 buses with a cross-section of 650 ⁇ 70 mm (the width of one stack is about 2 meters, and the width of two stacks is about 4 meters).
  • the first method of the new concept provides for the use of anode risers on the upstream side of the cell only.
  • 100% of the potline amperage returns back to the current supply station via additional correction (compensation) busbars located under the bottom of the cells in a potline.
  • the upstream busbars of the cell carry half of the potline amperage under the bottom of the cell to the upstream risers of the following cell.
  • the downstream busbars of the cell carry the second half of the potline amperage to the risers of the following cell under the bottom, to the risers located on the downstream side of the cell.
  • the total potline current of opposite direction flows in the adjacent (neighbored) additional compensation busbars under the bottoms.
  • Claim 1 states that a side-by-side busbar system has anode risers both on the upstream side and on the downstream side of an electrolysis cell.
  • claim 1 states that the busbar system has at least one first compensation loop located under electrolysis cells and capable of passing through itself the first compensation current (amperage) under electrolysis cells in the direction opposite to the total electrolysis amperage direction.
  • FIG. 6 in the said application shows electrolysis cells, whose collector bars pass through the bottom perpendicular to the metal pad. Protection against metal leakage between the collector bars and the lining is likely to be cost-consuming, since the collector bars, the lining, and the cathode shell are substantially different in terms of their physical, electrical and thermal properties.
  • the probability of molten aluminum leakages, vertical collector bar dissolution and metal run-out is very high, since the said elements of the electrolysis cell constantly move relative to each other, and their geometry and physical properties change, which is another disadvantage of the application.
  • the known cell busbar system has a double-row side-by-side arrangement in a line, contains an anode busbar system part connected to anodes by anode rods and a cathode busbar system part composed of collector bars with flexible strap stacks projecting on both sides of the cathode shell of the cell.
  • the connection between the collector bars and the anode busbar system of the following cell in a row is made in the form of bus modules composed of main (collecting) cathode busbars, connecting busbars and anode risers. At least one riser in each module is located on the upstream side of the cell and at least one riser in each module is located on the downstream side of the cell.
  • the upstream anode risers are powered from the collector bars both on the upstream side and on the downstream side of the previous electrolysis cell, and the downstream anode risers are powered from the collector bars on the downstream side of the previous electrolysis cell.
  • about 1 ⁇ 2-3 ⁇ 4 of the module current flows through the upstream anode risers, while about 1 ⁇ 2-1 ⁇ 4 of the module current flows through the downstream anode risers, the connecting busbars are located under the cell bottom, and some connecting busbars of the outermost modules can at least pass around the cell ends and be preferably located at the molten metal level.
  • the busbar system shall obligatorily be part of a facility comprising two single-row lines of electrolysis cells, such lines being independent in terms of electrical current supply.
  • the cathode correction (compensation) busbars of each line are located in close proximity to the cathode busbar system of the adjacent cell row.
  • the current in the lines is directed in opposite directions to each other.
  • the anode risers on the upstream and downstream sides of an electrolysis cell are located symmetrically with respect to the YZ plane of the cell.
  • FIG. 1 shows a schematic diagram for the facility composed of two lines of electrolysis cells 3 , 5 , 1 and 4 , 6 , 2 in plan view, where the correction (compensation) busbars of adjacent potlines 5 and 6 extend under each row of potlines 3 and 4 in the immediate vicinity of the cathode busbar system of the line.
  • the potlines are independent with respect to power supply and each of them is connected to separate power sources 1 and 2 .
  • FIG. 5 shows the magnetic field, in mT, for magnetic induction vector component Bz in the middle of the metal pad of an electrolysis cell, according to the application for an invention, at an amperage of 800 kA.
  • High-amperage electrolysis cells (up to 2,000 kA) are disclosed herein, which are assembled from parallel lines of low-amperage electrolysis cells (modules), whose current is unidirectional. In the meantime, adjacent (neighboring) cells (modules) of each potline are combined into one combined cell, as shown in FIG. 2 .
  • Direction of the vertical component (Bz) of the magnetic field should be alternating in sign with respect to each quarter of the cell (propeller-like character);
  • the structure of the anode and the cathode of electrolysis cells includes great-in-size ferromagnetic masses that possess substantial metal protection properties against the magnetic field of the cathode busbar system.
  • the magnetic field generated by the anode risers mainly generates the vertical (Bz) magnetic field in the metal, considering that there are no ferromagnetic shields between the metal and the risers, which reduce the effect of the magnetic field from the risers upon the metal.
  • the (Bz) field directed downward (minus) is generated in the metal on the right side along the current flow in the riser, and the field directed upward (plus) is generated on the left side from the riser.
  • a sinusoid-like field for the (Bz) component with an amplitude of no more than 3.0-3.5 mT can be generated by selecting an appropriate distance and amperage in the risers on one longitudinal side.
  • the correction (compensation) busbars should be connected to their own, separate current source to preclude the potential difference between the cathode busbar system and the correction (compensation) busbars in order to avoid arcing, especially in the electrolysis cells that are located near the power source.
  • each potline is replaced by the correction (compensation) busbars 5 and 6 located in close proximity, mostly, under the bottoms of the adjacent cell rows of potlines 3 and 4 . Since the currents in the cathode busbar system and the correction (compensation) busbars are equal and flow in opposite directions, then, as a rule of thumb, the current from the busbars of the cathode busbar system and the correction (compensation) busbars compensates for the magnetic field around itself.
  • the correction (compensation) busbars first, compensate for the vertical magnetic field in the melt of electrolysis cells to bring it to optimal values and, second, subtract the magnetic field around each of two rows 3 and 4 of the potlines, thus preventing the influence of the magnetic field on the adjacent row of electrolysis cells.
  • the correction busbars not only optimize the vertical field component (Bz) in the metal, but also have an effect on the longitudinal component (By) generated mainly by volume currents and currents of collector bars, namely, they subtract it on the upstream longitudinal side of the cell and increase this component, by being added to it, on the downstream side, because they coincide in direction.
  • FIG. 6 shows the By field component in the metal of the cell with the risers installed only on the upstream side, provided the correction busbars are available. As can be seen, the magnetic field has a 100% positive direction with respect to this component.
  • this problem is solved by the availability of anode risers located on the opposite, downstream side 7 of the cell, as shown in FIG. 2 and FIG. 3 .
  • the total current in the risers on the upstream side reduces by approximately 2 times, and thus, facilitates an increase in the magnetic field Bx component on the upstream side, since the magnetic field generated by the anode risers with respect to the By component adds to a similar field generated by the correction (compensation) busbars.
  • the magnetic field from the anode risers on the downstream side subtracts the field from the correction (compensation) busbars.
  • test group operates with the following operating characteristics:

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Non-Insulated Conductors (AREA)
US16/484,453 2017-12-29 2018-12-21 Modular busbar for series of aluminium electrolyzers Abandoned US20200010968A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
RU2017147133 2017-12-29
RU2017147133A RU2678624C1 (ru) 2017-12-29 2017-12-29 Ошиновка модульная для серий алюминиевых электролизеров
PCT/RU2018/050166 WO2019132737A1 (ru) 2017-12-29 2018-12-21 Ошиновка модульная для серий алюминиевых электролизеров

Publications (1)

Publication Number Publication Date
US20200010968A1 true US20200010968A1 (en) 2020-01-09

Family

ID=65273641

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/484,453 Abandoned US20200010968A1 (en) 2017-12-29 2018-12-21 Modular busbar for series of aluminium electrolyzers

Country Status (9)

Country Link
US (1) US20200010968A1 (zh)
EP (1) EP3643813A4 (zh)
CN (1) CN110392750B (zh)
AU (1) AU2018398340A1 (zh)
BR (1) BR112019018189A2 (zh)
CA (1) CA3052237C (zh)
IL (1) IL269993B (zh)
RU (1) RU2678624C1 (zh)
WO (1) WO2019132737A1 (zh)

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO144675C (no) * 1979-07-24 1981-10-14 Ardal Og Sunndal Verk Anordning for kompensering av skadelig magnetisk paavirkning mellom to eller flere rekker av langsstilte elektrolyseovner for smelte-elektrolytisk fremstilling av metall, for eksempel aluminium
EP0084142B1 (en) * 1982-01-18 1987-06-10 ALUMINIA S.p.A. Method and apparatus for electric current supply of pots for electrolytic production of metals, particularly aluminium
FR2552782B1 (fr) 1983-10-04 1989-08-18 Pechiney Aluminium Cuve d'electrolyse a intensite superieure a 250 000 amperes pour la production d'aluminium par le procede hall-heroult
FR2583069B1 (fr) * 1985-06-05 1987-07-31 Pechiney Aluminium Dispositif de connexion entre cuves d'electrolyse a tres haute intensite, pour la production d'aluminium, comportant un circuit d'alimentation et un circuit independant de correction du champ magnetique
NO164787C (no) * 1988-05-11 1990-11-14 Norsk Hydro As Anordning for kompensering av skadelig magnetisk paavirkning fra likeretterfelt og endefelt paa tverrstilte elektrolyseovner i anlegg for smelteelektrolytisk fremstilling av aluminium.
RU2164557C2 (ru) * 1999-04-20 2001-03-27 ОАО "Объединенная компания "Сибирский алюминий" Ошиновка электролизера для получения алюминия
RU2170290C1 (ru) * 2000-02-10 2001-07-10 ОАО "Объединенная компания "Сибирский алюминий" Устройство для электропитания последовательно соединенных алюминиевых электролизеров
CN1246503C (zh) * 2003-06-13 2006-03-22 沈阳铝镁设计研究院 一种铝电解槽系列母线的配置方法
FR2868436B1 (fr) * 2004-04-02 2006-05-26 Aluminium Pechiney Soc Par Act Serie de cellules d'electrolyse pour la production d'aluminium comportant des moyens pour equilibrer les champs magnetiques en extremite de file
FR2882888B1 (fr) * 2005-03-01 2007-04-27 Solvay Circuit electrique d'un electrolyseur et procede pour reduire les champs electromagnetiques au voisinage de l'electrolyseur
RU2288976C1 (ru) * 2005-05-04 2006-12-10 Общество с ограниченной ответственностью "Инженерно-технологический центр" Ошиновка модульная мощных электролизеров для производства алюминия
RU2316619C1 (ru) * 2006-04-18 2008-02-10 Общество с ограниченной ответственностью "Русская инжиниринговая компания" Устройство для компенсации магнитного поля, наведенного соседним рядом последовательно соединенных электролизеров большой мощности
CN101423959A (zh) * 2008-11-21 2009-05-06 中国铝业股份有限公司 铝电解槽母线配置结构
CN101423958A (zh) * 2008-11-21 2009-05-06 中国铝业股份有限公司 包括外部补偿的铝电解槽母线配置结构
CN101423960A (zh) * 2008-11-21 2009-05-06 中国铝业股份有限公司 铝电解槽外部母线补偿结构
CN101748443B (zh) * 2008-12-09 2012-05-23 贵阳铝镁设计研究院有限公司 端头两点进电模式的铝电解槽阴极母线的配置方法及结构
FR2977898A1 (fr) * 2011-07-12 2013-01-18 Rio Tinto Alcan Int Ltd Aluminerie comprenant des cuves a sortie cathodique par le fond du caisson et des moyens de stabilisation des cuves
IN2015DN00213A (zh) * 2012-07-17 2015-06-12 Obshchestvo S Ogranichennoy Otvetstvennostyu Obedinennaya Kompaniya Rusal Inzh T Ts
FR3009564A1 (fr) * 2013-08-09 2015-02-13 Rio Tinto Alcan Int Ltd Aluminerie comprenant un circuit electrique de compensation
MY183698A (en) 2015-02-09 2021-03-08 Rio Tinto Alcan Int Ltd Aluminium smelter and method to compensate for a magnetic field created by the circulation of the electrolysis current of said aluminium smelter
WO2017020123A1 (en) * 2015-08-06 2017-02-09 9320-0145 Québec Inc. Electrical connector system for electrolysis cell of aluminum production plant and method of using same
FR3042509B1 (fr) * 2015-10-15 2017-11-03 Rio Tinto Alcan Int Ltd Serie de cellules d'electrolyse pour la production d'aluminium comportant des moyens pour equilibrer les champs magnetiques en extremite de file

Also Published As

Publication number Publication date
BR112019018189A2 (pt) 2020-06-23
RU2678624C1 (ru) 2019-01-30
CN110392750A (zh) 2019-10-29
IL269993B (en) 2022-06-01
CA3052237A1 (en) 2019-07-04
CA3052237C (en) 2021-07-27
EP3643813A1 (en) 2020-04-29
WO2019132737A1 (ru) 2019-07-04
EP3643813A4 (en) 2020-07-29
AU2018398340A1 (en) 2019-09-26
CN110392750B (zh) 2023-07-21

Similar Documents

Publication Publication Date Title
CN101065517B (zh) 用于铝电解还原槽的电连接与磁补偿方法及其系统
US20080078674A1 (en) Module busbar arrangement for powerful aluminum electrolytic cells
US7513979B2 (en) Series of electrolysis cells for the production of aluminium comprising means for equilibration of the magnetic fields at the ends of the lines
US20080041718A1 (en) Device for compensation of magnetic field induced by a neighboring row of high-power reduction cells connected in series
US20140138240A1 (en) Aluminum smelter including cells with cathode output at the bottom of the pot shell and cell stabilizing means
DK179170B1 (en) ALUMINUM MELTING SYSTEMS INCLUDING AN ELECTRIC EQUALITY CIRCUIT
CA1232868A (en) Arrangement of busbars for electrolytic reduction cell
CA3052237C (en) A modular busbar system for aluminum potlines
AU693391B2 (en) Busbar arrangement for electrolytic cells
PL115407B3 (en) Method and apparatus for compensation of magnetic fields of adjoining rows of thermo-electrolyzer tanks
US20170350028A1 (en) A modified electrolysis cell and a method for modifying same
CN108368624B (zh) 用于生产铝的包括用于均衡电解池排端部的磁场的装置的电解池组
RU2164557C2 (ru) Ошиновка электролизера для получения алюминия
RU2548352C2 (ru) Ошиновка алюминиевых электролизеров продольного расположения
AU2003100935A4 (en) Busbar system for aluminium electrolytic cell
WO2017051317A1 (en) Cathode busbar system for electrolytic cells arranged side by side in series
RU2295589C1 (ru) Ошиновка алюминиевых электролизеров
WO2018234946A1 (en) ELECTROLYSIS INSTALLATION USING THE HALL-HÉROULT METHOD COMPRISING THE VERTICAL MAGNETIC FIELD
GB2549731A (en) Busbar system for electrolytic cells arranged side by side in series
SI8610950A8 (sl) Naprava za povezavo med jakotočnimi elektroliznimi celicami za pridobivanje aluminija, obsegajoča napajalni vod in neodvisen vod za korigiranje magnetnega polja

Legal Events

Date Code Title Description
AS Assignment

Owner name: OBSHCHESTVO S OGRANICHENNOY OTVETSTVENNOST'YU "OBE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MANN, VIKTOR KHRIST'YANOVICH;PINGIN, VITALIJ VALER'EVICH;PLATONOV, VITALIJ VLADIMIROVICH;AND OTHERS;REEL/FRAME:050506/0725

Effective date: 20190807

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: FINAL REJECTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: FINAL REJECTION MAILED

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION