EP0025416B1 - Einschlagvorrichtung für einen Elektrolyseofen - Google Patents

Einschlagvorrichtung für einen Elektrolyseofen Download PDF

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Publication number
EP0025416B1
EP0025416B1 EP80810283A EP80810283A EP0025416B1 EP 0025416 B1 EP0025416 B1 EP 0025416B1 EP 80810283 A EP80810283 A EP 80810283A EP 80810283 A EP80810283 A EP 80810283A EP 0025416 B1 EP0025416 B1 EP 0025416B1
Authority
EP
European Patent Office
Prior art keywords
guide
chisel
alignment
box
crust
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
Application number
EP80810283A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0025416A1 (de
Inventor
Edwin Gut
Erwin Arnold
Gottfried Maugweiler
Hans Friedli
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
Schweizerische Aluminium 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 Schweizerische Aluminium AG filed Critical Schweizerische Aluminium AG
Priority to AT80810283T priority Critical patent/ATE1755T1/de
Publication of EP0025416A1 publication Critical patent/EP0025416A1/de
Application granted granted Critical
Publication of EP0025416B1 publication Critical patent/EP0025416B1/de
Expired 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
    • C25C3/14—Devices for feeding or crust breaking

Definitions

  • the present invention relates to an impact device for breaking the solidified crust of an electrolysis furnace, in particular for the production of aluminum, which comprises a pressure cylinder, a piston rod and a chisel.
  • the electrolyte becomes poor in aluminum oxide.
  • a lower concentration of 1-2% by weight of aluminum oxide in the electrolyte there is an anode effect, which results in a voltage increase from, for example, 4-4.5 V to 30 V and above.
  • the crust must be hammered in and the aluminum oxide concentration increased by adding new aluminum oxide (alumina).
  • the cell is usually operated periodically in normal operation, even if there is no anode effect.
  • the bath crust has to be hammered in and the alumina concentration increased by adding new aluminum oxide, which corresponds to cell operation.
  • the known embodiments have the disadvantage that both the guide and the chisel have to be produced in a solid construction which causes a certain clumsiness.
  • the bearings counteracting rotation will be eroded by penetrated alumina grains and hindered in their function.
  • the inventors have therefore set themselves the task of creating a chisel guide for an impact device for breaking the solidified crust of an electrolysis furnace, which, despite its simple and relatively light construction, secures the chisel against twisting and has a long service life with little susceptibility to faults.
  • the guide box is made of solid steel sheets, for example with a thickness of 2-3 mm, and therefore meets the requirements regarding mechanical stability.
  • the guide box apart from its underside with the chisel outlet opening, can be gas-tight be designed.
  • the guide box reaches through the oven cover so that only its gas-tight part looks out.
  • the cover plate of the guide box is in turn gas-tight penetrated by the piston rod, which presses the chisel down when the crust is hammered in.
  • the guide box also called the guide housing, is flanged to the underside of the printing cylinder.
  • the furnace cover can also be the cover plate of the guide box.
  • the guide rollers preferably consist of a wear-resistant metal casting, e.g. Cast steel or gray cast iron. They are arranged on a roller guide bearing without ball bearings or the like.
  • the guide rollers which preferably have a diameter of a few cm, do not lie directly on a guide surface of the chisel, they have a little play, but ⁇ 1 mm.
  • the structural design and the arrangement of the guide roller (s), depending on the chisel to be guided, can be designed as you see fit.
  • a chisel has only one vertical guide surface, e.g. in the case of a chisel which is semicircular in cross section, a roller extending over part of or over the entire guide surface or two smaller rollers arranged at the ends of this guide surface can be used. In this way, however, only a twisting of the chisel, but not its lateral deflection, can be prevented.
  • longitudinal axes are always horizontal. These longitudinal axes are preferably in the same horizontal plane, in the lowest region of the guide box.
  • a flow wiper is arranged on the underside of the guide box and extends over the entire width of the guide surface (s).
  • the lower edge of the scraper which bears less play than the guide rollers on the guide surface (s), is preferably not horizontal, but e.g. oblique or V-shaped.
  • the impact device which in principle consists of a pressure cylinder, piston rod, chisel and guide box, is attached directly or indirectly to the cell structure or is part of an operating vehicle or furnace manipulator.
  • the stability achieved by the chisel guide according to the invention with guide box and rollers is, compared to the known piston guides, considerably less complex and yet more effective.
  • a cuboid guide box 10 made of sheet steel is shown.
  • the chisel 12 in the present case in the form of a fishtail, is guided through this guide box.
  • the relatively solid construction of the chisel 12 prevents the other one, which is not in engagement with the guide rollers 14
  • Side of the chisel is deflected.
  • a further pair of guide rollers can be provided on the other side, or the guide rollers extend, preferably arranged in the middle, over a larger area of the chisel width.
  • roller guide bearings 16 are fixed on the upper side of the bottom plate of the guide box, e.g. by welding.
  • the flow wiper 18 is arranged on the lower side of the base plate. This stripping device, which extends over the entire width of the guide surfaces, prevents flux residues that solidify when the chisel is pulled up from getting under the guide rollers. No wiper is provided on the narrow sides of the chisel 12.
  • the flow wiper 18 is V-shaped, the angle a expediently being between 90 and 150 °.
  • the guide box 10 extends through the furnace cover 20, with sealing plates 22 being arranged in order to achieve a more effective encapsulation.

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)
  • Disintegrating Or Milling (AREA)
  • Discharge Heating (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Processing Of Solid Wastes (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
EP80810283A 1979-09-10 1980-09-09 Einschlagvorrichtung für einen Elektrolyseofen Expired EP0025416B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80810283T ATE1755T1 (de) 1979-09-10 1980-09-09 Einschlagvorrichtung fuer einen elektrolyseofen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH814979 1979-09-10
CH8149/79 1979-09-10

Publications (2)

Publication Number Publication Date
EP0025416A1 EP0025416A1 (de) 1981-03-18
EP0025416B1 true EP0025416B1 (de) 1982-11-03

Family

ID=4335904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80810283A Expired EP0025416B1 (de) 1979-09-10 1980-09-09 Einschlagvorrichtung für einen Elektrolyseofen

Country Status (9)

Country Link
US (1) US4349231A (no)
EP (1) EP0025416B1 (no)
JP (1) JPS5644788A (no)
AT (1) ATE1755T1 (no)
CA (1) CA1144521A (no)
DE (2) DE2943293C2 (no)
IS (1) IS1149B6 (no)
NO (1) NO154172C (no)
ZA (1) ZA805338B (no)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH644156A5 (de) * 1979-09-10 1984-07-13 Alusuisse Vorrichtung zur bedienung von elektrolyseoefen.
JPH0642332Y2 (ja) * 1993-10-01 1994-11-02 大日本スクリーン製造株式会社 基板洗浄装置
FR2872176B1 (fr) * 2004-06-25 2006-07-28 Ecl Soc Par Actions Simplifiee Racleur d'un organe de percage d'une croute de bain d'une cellule d'electrolyse destinee a la production d'aluminium
US7915550B2 (en) * 2008-06-17 2011-03-29 Mac Valves, Inc. Pneumatic system electrical contact device
US8367953B2 (en) * 2008-06-17 2013-02-05 Mac Valves, Inc. Pneumatic system electrical contact device
WO2010151205A1 (en) * 2009-06-25 2010-12-29 Atlas Copco Construction Tools Ab Hand-held demolition tool
CN101634040B (zh) * 2009-08-19 2011-04-06 云南云铝润鑫铝业有限公司 铝电解槽打壳故障报警装置
FR3032458B1 (fr) * 2015-02-09 2020-10-30 Ecl Module de service pour l exploitation d une installation de production d aluminium par electrolyse ignee
CN107287621B (zh) * 2017-07-07 2023-08-18 新乡宏达冶金振动设备有限公司 一种电解质清理机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2666621A (en) * 1951-03-22 1954-01-19 Gerald R Hunt Wiper for members operating in wells
DE1210994B (de) * 1963-07-08 1966-02-17 Adolf Nann Einschlagvorrichtung eines Krustenbrechers fuer Aluminium-Schmelzflusselektrolyseoefen
US3681229A (en) * 1970-07-17 1972-08-01 Aluminum Co Of America Alumina feeder
LU68908A1 (no) * 1973-01-22 1974-02-11
US3901787A (en) * 1974-03-07 1975-08-26 Nippon Light Metal Co Alumina feeder for electrolytic cells
DE2530831C2 (de) * 1975-07-10 1982-06-16 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Vorrichtung zum Einblasen von Gas, wie insbesondere Luft, in ein elektrolytisches Aluminiumschmelzbad sowie zum Brechen der Kruste des Schmelzbades

Also Published As

Publication number Publication date
DE2943293C2 (de) 1983-02-03
ATE1755T1 (de) 1982-11-15
IS2581A7 (is) 1981-03-11
IS1149B6 (is) 1984-03-05
ZA805338B (en) 1981-09-30
US4349231A (en) 1982-09-14
NO802643L (no) 1981-03-11
NO154172B (no) 1986-04-21
EP0025416A1 (de) 1981-03-18
DE2943293A1 (de) 1981-03-19
NO154172C (no) 1986-08-06
DE3061041D1 (en) 1982-12-09
CA1144521A (en) 1983-04-12
JPS5644788A (en) 1981-04-24

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