US2897585A - Method for removal of the current supply bolts from aluminum electrolysis furnaces - Google Patents

Method for removal of the current supply bolts from aluminum electrolysis furnaces Download PDF

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Publication number
US2897585A
US2897585A US513383A US51338355A US2897585A US 2897585 A US2897585 A US 2897585A US 513383 A US513383 A US 513383A US 51338355 A US51338355 A US 51338355A US 2897585 A US2897585 A US 2897585A
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US
United States
Prior art keywords
removal
drill
bolts
bolt
current supply
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
US513383A
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English (en)
Inventor
Bodewein Gerhard
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.)
Vereinigte Aluminium Werke AG
Original Assignee
Vereinigte Aluminium Werke AG
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 Vereinigte Aluminium Werke AG filed Critical Vereinigte Aluminium Werke AG
Application granted granted Critical
Publication of US2897585A publication Critical patent/US2897585A/en
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Expired - Lifetime legal-status Critical Current

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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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49718—Repairing
    • Y10T29/49721—Repairing with disassembling
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49815—Disassembling
    • Y10T29/49822—Disassembling by applying force

Definitions

  • lateral cylindrical or conic bolts generally made of iron are employed, which enable the support of the anodes and the supply of current to the same.
  • the anodes are lowered into the electrolyte in conformity with their consumption; they are submerged with their lower part into the molten electrolyte having a temperature of about 950 C.
  • the bolts are entered into the upper portion of the anode block and removed from the same as soon as they reach the vicinity of the hot electrolyte and the danger of their destruction arises.
  • the devices are based upon the fact that the withdrawal devices for the bolts are supported upon the anode itself, the latter serving as an abutment; however, the known bolt removal methods and devices meet'with great difficulty mainly caused by the inclined position of the bolts and the high operating temperature which exerts an enormous strain upon the service personnel.
  • a current contact forming bolt 3 is entered into the anode 1, the latter reaching into the molten electrolyte 2.
  • a hollow drill 4 is entered upon and surrounds the contact bolt 3 to be removed from the anode 1.
  • the drill 4 upon rotation serves to produce a cylindrical gap surrounding contact bolt 3.
  • the tubular drill 4 at its operative end preferably provided with hard cutters, not shown in the drawing; the drill is actuated by motor 5, which may be driven by compressed air or electricity.
  • the device can be operated without difficulty and the hollow drill 4 is automatically centered. Cooperation by the service personnel is restricted to the forward movement of the drill 4.
  • the drill creates after a few minutes of revolution a bore having a width of 5 to 10 millimeters around the contact bolt 3, which permits an easy removal thereof from the anode 1.
  • the device is for its manipulation provided with handles 6, and the tubular drill 4 with openings 7 for the removal of the powder created by the rotation of the drill 4.
  • the application of the device is, as follows:
  • the hollow drill 4 is pushed over the protruding end of bolt 3 and set in rotation by the motor 5.
  • the rotating tubular drill 4 is guided by the contact bolt 3 and therefore needs only to be pressed forward to enter into the anode 1 until the depth of the contact bolt 3 is reached and the latter is completely freed.
  • the produced fines are removed through openings 7 of the tubular drill 4.
  • a method for withdrawing a bolt having a portion embedded in a pre-burned continuous anode of an aluminum electrolysis furnace with the aid of a hollow drill driven by an electric motor having arms the steps comprising selecting a hollow drill having an internal diam eter slightly larger than said bolt, whereby the drill may be telescoped over the bolt and be guided and centered by the bolt, positioning said drill to surround said bolt and driving said drill with said motor, and muscularly feeding said drill by axially directed pressure applied to said arms, whereby said drill will remove all of the material surrounding throughout the external periphery of said bolt thereby freeing the bolt from its embedment, applying the muscular feed forces and simultaneously a mo mentum compensating force to the arms in such a relationship that an average adult muscular force will be suflicient to counteract the rotary momentum generated by the drilling and transmitted to the arms, and subsequently manually removing the bolt freed from its embedment.

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  • 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)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
US513383A 1954-06-05 1955-06-06 Method for removal of the current supply bolts from aluminum electrolysis furnaces Expired - Lifetime US2897585A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV7357A DE1118977B (de) 1954-06-05 1954-06-05 Verfahren zur Entfernung von Kontaktbolzen aus vorgebrannten kontinuierlichen Anoden in Aluminiumelektrolyseoefen

Publications (1)

Publication Number Publication Date
US2897585A true US2897585A (en) 1959-08-04

Family

ID=7571904

Family Applications (1)

Application Number Title Priority Date Filing Date
US513383A Expired - Lifetime US2897585A (en) 1954-06-05 1955-06-06 Method for removal of the current supply bolts from aluminum electrolysis furnaces

Country Status (4)

Country Link
US (1) US2897585A (de)
DE (1) DE1118977B (de)
FR (1) FR1124778A (de)
GB (1) GB782605A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180018A (en) * 1960-12-05 1965-04-27 Everett D Hougen Method for separating spot welded panels
US3466732A (en) * 1966-11-18 1969-09-16 George H Taylor Jr Method of servicing printed circuit boards
US4037304A (en) * 1976-06-24 1977-07-26 Olin Corporation Method of removing rods from metallic anodes
US4442593A (en) * 1982-08-25 1984-04-17 Ardal Og Sunndal Verk A.S. Anode butt remover
US4688315A (en) * 1986-05-28 1987-08-25 Jannke Thomas E Screw extractor and method of using same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024178A (en) * 1958-04-19 1962-03-06 Elektrokemisk As Process for operating soderberg anodes with vertical contact studs

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1397541A (en) * 1920-02-03 1921-11-22 Tinius Olsen Testing Mach Co Method for use in connection with the testing of materials
US2237570A (en) * 1938-10-07 1941-04-08 Frederick M Bowers Method of probing a weld
US2312176A (en) * 1941-01-29 1943-02-23 Libbey Owens Ford Glass Co Glass drill
US2594810A (en) * 1949-06-15 1952-04-29 Erwin L Schaub Method of relining worn bearing surfaces
US2662428A (en) * 1951-07-31 1953-12-15 Mueller Co Line stopper shell cutter
US2684526A (en) * 1951-07-06 1954-07-27 Hoover John Dean Method for backing off broken studs
US2722734A (en) * 1944-07-20 1955-11-08 Grant Alvin Reconstruction of chemical equipment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305200A (en) * 1941-02-25 1942-12-15 Hugh W Sitton Drilling tool

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1397541A (en) * 1920-02-03 1921-11-22 Tinius Olsen Testing Mach Co Method for use in connection with the testing of materials
US2237570A (en) * 1938-10-07 1941-04-08 Frederick M Bowers Method of probing a weld
US2312176A (en) * 1941-01-29 1943-02-23 Libbey Owens Ford Glass Co Glass drill
US2722734A (en) * 1944-07-20 1955-11-08 Grant Alvin Reconstruction of chemical equipment
US2594810A (en) * 1949-06-15 1952-04-29 Erwin L Schaub Method of relining worn bearing surfaces
US2684526A (en) * 1951-07-06 1954-07-27 Hoover John Dean Method for backing off broken studs
US2662428A (en) * 1951-07-31 1953-12-15 Mueller Co Line stopper shell cutter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180018A (en) * 1960-12-05 1965-04-27 Everett D Hougen Method for separating spot welded panels
US3466732A (en) * 1966-11-18 1969-09-16 George H Taylor Jr Method of servicing printed circuit boards
US4037304A (en) * 1976-06-24 1977-07-26 Olin Corporation Method of removing rods from metallic anodes
US4442593A (en) * 1982-08-25 1984-04-17 Ardal Og Sunndal Verk A.S. Anode butt remover
US4688315A (en) * 1986-05-28 1987-08-25 Jannke Thomas E Screw extractor and method of using same

Also Published As

Publication number Publication date
GB782605A (en) 1957-09-11
FR1124778A (fr) 1956-10-17
DE1118977B (de) 1961-12-07

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