US3867562A - Anchoring for an electrically conductive bar in a groove in an electrode made out of a carbon block - Google Patents

Anchoring for an electrically conductive bar in a groove in an electrode made out of a carbon block Download PDF

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Publication number
US3867562A
US3867562A US439625A US43962574A US3867562A US 3867562 A US3867562 A US 3867562A US 439625 A US439625 A US 439625A US 43962574 A US43962574 A US 43962574A US 3867562 A US3867562 A US 3867562A
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US
United States
Prior art keywords
groove
bar
anchoring
cast iron
mantle
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.)
Expired - Lifetime
Application number
US439625A
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English (en)
Inventor
Werner K Fischer
Raoul Jemec
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.)
Alcan Holdings Switzerland AG
Original Assignee
Alusuisse Holdings AG
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Filing date
Publication date
Application filed by Alusuisse Holdings AG filed Critical Alusuisse Holdings AG
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Publication of US3867562A publication Critical patent/US3867562A/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/02—Details
    • H05B7/06—Electrodes
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/12—Working chambers or casings; Supports therefor
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/03—Electrodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • ABSTRACT Anchoring for a conductive bar in a groove in an electrode block whereby in the space between the walls of the bar and the groove a cast iron mantle around the bar is provided. in each side wall of the groove at least one recess is provided for the anchoring of at least one projection of the cast iron mantle surrounding the bar.
  • the carbon lining which forms the floor of a cell in a furnace for the electrolysis of a molten charge, was for several decades when the electrolytic cells were still relatively small, predominantly made by crushing a synthetic carbon mass consisting of coke granules and a cokeable bonding agent and spreading this over the conductive ferrous cathode bars which were already arranged in the cell. Before the cell was put into operation this carbon lining of the cell floor had to be baked (sintered).
  • the anchoring of the ferrous cathode bars in the prebaked synthetic carbon blocks can take place in various ways.
  • the cathode bars the whole cross section of which is rectangular, were placed in suitable recesses or grooves in the carbon blocks and rammed with a green synthetic carbon mass. More recently the green synthetic carbon mass has been replaced by pouring in cast iron.
  • Present day knowledge includes the arrangement in a carbon block ofa groove which is dove tail shaped in cross section and in which a bar is set and which with the aid of cast-in cast iron anchors the bar in the carbon block. On fixing the conductive bar in the groove in this way it is however found to.
  • the gap between the grey cast iron and the walls of the dove tail groove of the carbon block resulting from the contraction of the grey cast iron and the bar on cooling is enough to produce a slight displacement of the bar set into the groove and enclosed by the cast iron, such a displacement being possible for example as a result of vibration on transport of the carbon block, so that the gap between the cast iron and the walls of the clove tailed groove in the carbon block becomes narrow and the block in this case, on reheating to, for example, 700-750C after fitting into the reduction cell, is broken by the thermal expansion of the bar.
  • the object of the invention presented here is to produce such an anchoring for a conductive bar in a groove of a carbon block that the known disadvantages associated with the kind of anchoring described above are avoided and so that the fracture of the carbon block due to the thermal expansion of the bar described previously is not possible.
  • each side wall of the groove there is provided at least one recess which serves to anchor at least one projection of the cast iron jacket surrounding the bar.
  • the anchoring runs esssentially parallel to the base of the block.
  • the anchoring can to advantage be further developed in such a way that the upper and lower walls of the recess in the groove in the electrode block are made to run parallel to each other. Further, it is possible to shape the upper and lower walls of the recess such that they are slightly divergent in the direction towards the bars.
  • the drawing shows an exemplified embodiement of the object of the invention in a simplified manner of representation and shows:
  • FIG. 1 Carbon blocks with inlaid conductive bar and the cast-filled groove which is in the position for casting with the grooves in the blocks facing upwards.
  • FIG. 2 Carbon blocks with inlaid conductive bar, lying in the position in preparation for building in to the trough of a furnace for the electrolysis of a molten charge, with the grooves of the .blocks facing downwards.
  • FIG. 3 A section through a perspective illustration of a furnace trough having a lining of carbon blocks combined with the conductive bars.
  • FIG. 4 A section through an electrode block in the casting position from which can be seen the position of a conductive bar in a groove or anchoring in the block in the cooled condition after the cast iron has been cast into the groove 2 of the block 1
  • FIG. 5 A section through an electrode block in the operating position of the electrode block from which can be seen the position ofa conductive bar in a groove or in an anchoring in an electrode block at operating temperature.
  • the carbon blocks 1 shown in FIGS. 1, 2 and 3 are fitted in a row in a particular number, for example five, with a conductive bar 3, as will be described presently in detail, tightly held and, for example, set into a steel trough 17 of a furnace 18 for the electrolysis of a molten charge, in which furnace in the electrolysis of the molten charge these serve as cathodes being connected to a power supply by way of the conductive bars 3 in a manner not illustrated here.
  • a layer of fire-proof, heat insulating brickwork As shown in FIGS. 4 and 5 the electrode block 1 has a groove 2 to accept a conductive bar 3.
  • At least one recess 6, 7 is provided in each of the two side-walls 4, 5 of the groove 2 the said recess 6, 7 being arranged preferably at a height corresponding to the middle of the sidewalls.
  • the recesses 6, 7 preferably extend parallel to the length of the groove 2 whereby the upper and lower walls 8, 9 of the recesses 6, 7 can preferably be arranged parallel to each other but can also be arranged divergent in the direction towards the bar 3.
  • the carbon blocks 1 are laid on the floor aligned in preparation for the introduction of the conductive bar 3 in the groove 2 and with the open side of the grooves 2, which are essentially rectangular in cross section, facing upwards to accept the molten cast iron (see also FIG. 1).
  • the bars 3 Before inserting the bars 3 in the grooves 2 the bars 3 are heated to a certain temperature, for example 700C and then laid in position in the groove 2 of the electrode block shown in FIGS. 1 and 4, with the ends of the bars 3 laid ontwo blocks not shown to keep the conductive bars at a suitable height with respect to the position of the grooves 2 in the carbon blocks in which there remains between the bars 3 and the walls of the groove 2, a U-shaped gap which allows easy flow of the molten iron which is finally cast into the said gap.
  • a certain temperature for example 700C
  • the dimensions of the recess 6, 7 and the distance of the same from the bottom 14 of the groove 2 are chosen in accordance with certain specific calculations which take into account the casting conditions and the expansion of the electrode block 1 and the cast iron mantle 10 at average operating conditions.
  • the temperature of the electrolyte is about 950 960C and the average temperature of the conductive bar 3 during operation is about 750C.
  • An anchoring arrangement for a conductor bar in an electrode block said conductor bar being provided with a cast iron mantle, said electrode block defining a groove operable for receiving said conductor bar and said mantle, at least one lateral projection provided on said mantle and at least one recess defined in a sidewall of said groove into which said projection projects, whereby said cast iron mantle and therefore said conductor bar is anchored in said groove to restrain removal in an upright direction of said conductor bar from said electrode block.
  • Anchoring arrangement according to claim I wherein said recess comprises an upper and a lower surface, said surfaces being arranged parallel to one another.
  • Anchoring arrangement according to claim 1 wherein said recess comprises an upper and a lower surface, saidsurfaces being slightly divergent in the direction of the bar.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Fuel Cell (AREA)
  • Furnace Details (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
US439625A 1973-02-09 1974-02-04 Anchoring for an electrically conductive bar in a groove in an electrode made out of a carbon block Expired - Lifetime US3867562A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH194073A CH544578A (de) 1973-02-09 1973-02-09 Elektrodenblock für eine Elektrolysezelle mit einem Stromleit-Barren in einer Nut des Elektrodenblockes

Publications (1)

Publication Number Publication Date
US3867562A true US3867562A (en) 1975-02-18

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ID=4222148

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US439625A Expired - Lifetime US3867562A (en) 1973-02-09 1974-02-04 Anchoring for an electrically conductive bar in a groove in an electrode made out of a carbon block

Country Status (14)

Country Link
US (1) US3867562A (de)
JP (1) JPS5550119B2 (de)
AT (1) AT327580B (de)
BR (1) BR7400933D0 (de)
CA (1) CA1022880A (de)
CH (1) CH544578A (de)
DE (1) DE2405461C3 (de)
FR (1) FR2217071B1 (de)
GB (1) GB1431622A (de)
IT (1) IT1007268B (de)
NL (1) NL176377C (de)
NO (1) NO137508C (de)
YU (1) YU35821B (de)
ZA (1) ZA74766B (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2438691A1 (fr) * 1978-10-11 1980-05-09 Gewerk Eisenhuette Westfalia Procede pour le sechage des zones de jonctions d'elements de support ou de rails conducteurs ainsi que d'anodes ou de cathodes devant etre reunis par coulee pour fours d'electrolyse
US4440613A (en) * 1982-05-03 1984-04-03 Chester Pilgrim Electroplating machine
FR2572873A1 (fr) * 1984-11-06 1986-05-09 Siderurgie Fse Inst Rech Electrode de paroi pour four metallurgique electrique a courant continu
US4683046A (en) * 1985-03-22 1987-07-28 Swiss Aluminium Ltd. Reduction pot for the production of aluminum
US5539857A (en) * 1994-01-24 1996-07-23 Caco Pacific Corporation Heater block for injection molding with removable heat conductive member in groove in heater block
US5976333A (en) * 1998-01-06 1999-11-02 Pate; Ray H. Collector bar
DE102011004009A1 (de) * 2011-02-11 2012-08-16 Sgl Carbon Se Kathodenanordnung und Kathodenblock mit einer eine Führungsvertiefung aufweisenden Nut
WO2013039893A1 (en) * 2011-09-12 2013-03-21 Alcoa Inc. Aluminum electrolysis cell with compression device and method
DE102013207737A1 (de) * 2013-04-26 2014-10-30 Sgl Carbon Se Kathodenblock mit einer Nut mit variierender Tiefe und einer Fixiereinrichtung
AU2015200231B2 (en) * 2011-09-12 2016-04-14 Alcoa Usa Corp. Aluminum electrolysis cell with compression device and method
WO2016079605A1 (en) * 2014-11-18 2016-05-26 Kan-Nak S.A. Cathode current collector for a hall-heroult cell
RU2771724C2 (ru) * 2013-04-26 2022-05-11 Токай КОБЕКС ГмбХ Катодный блок, имеющий паз переменной глубины и систему крепления

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO139865C (no) * 1977-06-06 1979-05-23 Norsk Hydro As Utskiftbar katodeenhet egnet som modul for oppbygging av stabile, ikke deformerbare katodesystemer i elektrolysoerer for fremstilling av magnesium samt elektrolysoer med innmonterte katodeenheter
EP0052577B1 (de) * 1980-11-19 1984-02-15 Schweizerische Aluminium AG Verankerung für einen Kathodenbarren
DE102010041084A1 (de) * 2010-09-20 2012-03-22 Sgl Carbon Se Elektrolysezelle zur Gewinnung von Aluminium
DE102016210693A1 (de) * 2016-06-15 2017-12-21 Sgl Cfl Ce Gmbh Kathodenblock aufweisend eine neuartige Nut-Geometrie

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481554A (en) * 1946-12-17 1949-09-13 Thomas W Winstead Thermoplastic film heat sealing element
US3787310A (en) * 1972-09-13 1974-01-22 A Johnson Reduction of aluminum with improved reduction cell and anodes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481554A (en) * 1946-12-17 1949-09-13 Thomas W Winstead Thermoplastic film heat sealing element
US3787310A (en) * 1972-09-13 1974-01-22 A Johnson Reduction of aluminum with improved reduction cell and anodes

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347661A (en) * 1978-10-11 1982-09-07 Gewerkschaft Eisenhutte Westfalia Process of making electric assemblies
FR2438691A1 (fr) * 1978-10-11 1980-05-09 Gewerk Eisenhuette Westfalia Procede pour le sechage des zones de jonctions d'elements de support ou de rails conducteurs ainsi que d'anodes ou de cathodes devant etre reunis par coulee pour fours d'electrolyse
US4440613A (en) * 1982-05-03 1984-04-03 Chester Pilgrim Electroplating machine
FR2572873A1 (fr) * 1984-11-06 1986-05-09 Siderurgie Fse Inst Rech Electrode de paroi pour four metallurgique electrique a courant continu
EP0183631A1 (de) * 1984-11-06 1986-06-04 Institut De Recherches De La Siderurgie Francaise (Irsid) Wandelektrode für einen elektrischen Gleichstromhüttenofen
US4683046A (en) * 1985-03-22 1987-07-28 Swiss Aluminium Ltd. Reduction pot for the production of aluminum
US5539857A (en) * 1994-01-24 1996-07-23 Caco Pacific Corporation Heater block for injection molding with removable heat conductive member in groove in heater block
US5976333A (en) * 1998-01-06 1999-11-02 Pate; Ray H. Collector bar
CN103429792A (zh) * 2011-02-11 2013-12-04 西格里碳素欧洲公司 阴极装置以及带有具有引导凹部的凹槽的阴极块
DE102011004009A1 (de) * 2011-02-11 2012-08-16 Sgl Carbon Se Kathodenanordnung und Kathodenblock mit einer eine Führungsvertiefung aufweisenden Nut
WO2012107412A3 (de) * 2011-02-11 2012-10-11 Sgl Carbon Se Kathodenanordnung und kathodenblock mit einer eine führungsvertiefung aufweisenden nut
WO2013039893A1 (en) * 2011-09-12 2013-03-21 Alcoa Inc. Aluminum electrolysis cell with compression device and method
US9206518B2 (en) 2011-09-12 2015-12-08 Alcoa Inc. Aluminum electrolysis cell with compression device and method
AU2015200231B2 (en) * 2011-09-12 2016-04-14 Alcoa Usa Corp. Aluminum electrolysis cell with compression device and method
DE102013207737A1 (de) * 2013-04-26 2014-10-30 Sgl Carbon Se Kathodenblock mit einer Nut mit variierender Tiefe und einer Fixiereinrichtung
CN105247109A (zh) * 2013-04-26 2016-01-13 西格里碳素欧洲公司 具有具不同深度的狭槽和固定系统的阴极块
CN105247109B (zh) * 2013-04-26 2018-06-05 西格里Cfl Ce有限责任公司 具有具不同深度的狭槽和固定系统的阴极块
RU2727621C2 (ru) * 2013-04-26 2020-07-22 Токай КОБЕКС ГмбХ Катодный блок, имеющий паз переменной глубины и систему крепления
RU2771724C2 (ru) * 2013-04-26 2022-05-11 Токай КОБЕКС ГмбХ Катодный блок, имеющий паз переменной глубины и систему крепления
WO2016079605A1 (en) * 2014-11-18 2016-05-26 Kan-Nak S.A. Cathode current collector for a hall-heroult cell
CN107208289A (zh) * 2014-11-18 2017-09-26 诺瓦拉姆股份有限公司 用于hall‑heroult单元的阴极电流收集器
EA036082B1 (ru) * 2014-11-18 2020-09-23 Новалум Са Катодный токовый коллектор для электролизера холла-эру
EP4276226A3 (de) * 2014-11-18 2024-01-03 Novalum SA Kathodenstromkollektor für eine hall-heroult-zelle

Also Published As

Publication number Publication date
NO137508C (no) 1978-03-08
DE2405461A1 (de) 1974-08-15
YU35821B (en) 1981-06-30
BR7400933D0 (pt) 1974-11-05
NL176377C (nl) 1985-04-01
NO137508B (no) 1977-11-28
DE2405461C3 (de) 1980-10-16
ZA74766B (en) 1974-12-24
FR2217071B1 (de) 1978-04-21
CH544578A (de) 1973-11-30
FR2217071A1 (de) 1974-09-06
NO740423L (no) 1974-08-12
YU33074A (en) 1980-12-31
AT327580B (de) 1976-02-10
NL176377B (nl) 1984-11-01
AU6532274A (en) 1975-08-07
ATA101774A (de) 1975-04-15
IT1007268B (it) 1976-10-30
DE2405461B2 (de) 1980-02-21
NL7401770A (de) 1974-08-13
GB1431622A (en) 1976-04-14
JPS5550119B2 (de) 1980-12-16
CA1022880A (en) 1977-12-20
JPS49112818A (de) 1974-10-28

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