DE888731C - Electric furnace that works with electrodes, preferably a reduction or melting furnace - Google Patents

Electric furnace that works with electrodes, preferably a reduction or melting furnace

Info

Publication number
DE888731C
DE888731C DED10340A DED0010340A DE888731C DE 888731 C DE888731 C DE 888731C DE D10340 A DED10340 A DE D10340A DE D0010340 A DED0010340 A DE D0010340A DE 888731 C DE888731 C DE 888731C
Authority
DE
Germany
Prior art keywords
electrodes
furnace
reduction
works
electrode
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
DED10340A
Other languages
German (de)
Inventor
Alwin Wiese
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.)
Demag Elektrometallurgie GmbH
Original Assignee
Demag Elektrometallurgie GmbH
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 Demag Elektrometallurgie GmbH filed Critical Demag Elektrometallurgie GmbH
Priority to DED10340A priority Critical patent/DE888731C/en
Application granted granted Critical
Publication of DE888731C publication Critical patent/DE888731C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C22B4/08—Apparatus
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/12—Making spongy iron or liquid steel, by direct processes in electric furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/08—Heating by electric discharge, e.g. arc discharge
    • 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
    • H05B7/18—Heating by arc discharge
    • H05B7/20—Direct heating by arc discharge, i.e. where at least one end of the arc directly acts on the material to be heated, including additional resistance heating by arc current flowing through the material to be heated

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Discharge Heating (AREA)

Description

Elektrischer, mit Elektroden arbeitender Ofen, vorzugsweise Reduktions- oder Schmelzofen Die Erfindung richtet sich in erster Linie auf Lichtbogenreduktions-oder Schmelzöfen. Bei solchen Ofen ist die Frage des Elektrodenabbrandes bisher noch keineswegs befriedigend gelöst. Der Abbrand stellt einen nicht unwesentlichen Faktor der Betriebskosten bei größeren Ofen dar. Nun brennen die Elektroden in der Regel in Form einer einseitigen Spitze ab. Bei größeren Elektrodendurchmessern ergibt der einseitige Abbrand eine merkbare Deformation des theoretisch ermittelten Elektrodenteilkreises. Der theoretische Elektrodenteilkreis wird aus der Erfahrung heraus festgelegt und ergibt in bezug auf den Ofengang die günstigsten Verhältnisse. Infolgedessen ergeben sich wesentliche Beeinträchtigungen, wenn durch einseitigen Abbrand der beim Ofenbau zugrunde gelegte Teilkreis nicht mehr eingehalten wird. So ist z. B. mit der Verlagerung des Elektrodenteilkreises eine Erhöhung des übergangswiderstandes des von Elektrodenspitze zu Elektrodenspitze fließenden Stromes verbunden, da der einseitige Abbrand einen größeren Stromweg bedingt. Oft ist auch die Bildung eines Bären zwischen den Elektroden die Folge derartiger Abweichungen.Electric furnace working with electrodes, preferably reduction or melting furnace The invention is primarily directed to arc reduction or Melting furnaces. In the case of such furnaces, the question of electrode burn-up has not yet been answered in no way solved satisfactorily. The burn-up is a not insignificant factor the operating costs for larger furnaces. Now the electrodes usually burn in the form of a one-sided tip. With larger electrode diameters results the one-sided burn-off results in a noticeable deformation of the theoretically determined pitch circle of the electrode. The theoretical electrode pitch circle is determined from experience and results in the most favorable conditions in relation to the furnace cycle. As a result, surrendered significant impairments if due to one-sided burn-off of the furnace underlying pitch circle is no longer observed. So is z. B. with the relocation of the partial electrode circle an increase in the contact resistance of the electrode tip connected to the electrode tip of the flowing current, since the one-sided burn-off causes a requires a larger current path. Often there is also the formation of a bear between the electrodes the consequence of such deviations.

Gemäß der Erfindung lassen sich alle derartigen Unzuträglichkeiten auf eine verhältnismäßig einfache Weise beseitigen, und zwar dadurch, daß die Elektroden um ihre Längsachse drehbar angeordnet werden. Das kann in verschiedener Weise geschehen. Man kann z. B.. die Elektroden mit ihrer Fassung drehbar anordnen, wobei man zweckmäßigerweise, um nicht zur Anwendung von Schleifringen genötigt zu sein, die Drehbewegung nicht vollständig um 36o° durchführen wird, sondern in. Form einer Schwingbewegung. Man kann aber auch die Elektroden in ihrer Fassung drehbar anordnen, wobei die Drehbewegung ebenfalls periodisch, aber auch kontinuierlich vor sich gehen kann. Die periodische Bewegung kann sowohl eine Schwingbewegung sein, als eine von Zeit zu Zeit eingeschaltete Weiterdrehung der Elektroden. Das neue Elektrodendrehwerk kann sowohl bei festen Elektroden wie bei geschütteten oder gestampften Elektroden Verwendung finden. Der Antrieb kann z. B. aus Schnecke und Schneckenrad bestehen, wobei das Schneckenrad in geeigneter Weise, etwa durch Keilnuten und Gleitkeil mit der Elektrode in Verbindung steht. Als Dichtung .für derartige drehbare Elektroden sind Sand- oder Wassertassendichtungen besonders geeignet, da sie ohne weiteres die Drehung der Elektroden zulassen.According to the invention, all such inconveniences can be eliminated eliminate in a relatively simple manner, namely that the electrodes are arranged to be rotatable about their longitudinal axis. This can be done in a number of ways. You can z. B .. the electrodes with their holder arrange rotatable, being expedient in order not to be forced to use slip rings be, the rotary movement will not perform completely through 36o °, but in. Form a swinging movement. But you can also rotate the electrodes in their holder arrange, the rotational movement also periodically, but also continuously can go on. The periodic movement can be an oscillating movement, as a continued rotation of the electrodes, which is switched on from time to time. The new Electrode rotating mechanism can be used for fixed electrodes as well as for poured or tamped electrodes Find electrodes use. The drive can, for. B. from worm and worm wheel exist, the worm wheel in a suitable manner, such as by keyways and sliding wedge communicates with the electrode. As a seal for such rotatable electrodes Sand or water cup seals are particularly suitable as they are readily available allow the electrodes to rotate.

Claims (1)

PATENTANSPRÜCHE: i. Elektrischer, mit Elektroden arbeitender Ofen, vorzugsweise Lichtbogenreduktions- oder Schmelzofen, dadurch gekennzeichnet, daß die Elektroden um ihre Längsachse drehbar angeordnet sind. a,. Ofen nach Anspruch i, dadurch gekennzeichnet, daß die Elektroden innerhalb ihrer Fassung drehbar angeordnet sind. 3@. Ofen nach Anspruch i, gekennzeichnet durch einen periodisch arbeitenden Antrieb für die Drehung der Elektroden um ihre Längsachse. q. Ofen nach Anspruch i, gekennzeichnet durch. einen durchlaufenden Drehantrieb für die Drehung der Elektroden um ihre Längsachse. PATENT CLAIMS: i. Electric furnace operating with electrodes, preferably arc reduction furnace or melting furnace, characterized in that the electrodes are arranged to be rotatable about their longitudinal axis. a ,. Oven according to claim i, characterized in that the electrodes are rotatably arranged within their holder. 3 @. Furnace according to Claim i, characterized by a periodically operating drive for rotating the electrodes about their longitudinal axis. q. Furnace according to claim i, characterized by. a continuous rotary drive for rotating the electrodes around their longitudinal axis.
DED10340A 1951-10-03 1951-10-03 Electric furnace that works with electrodes, preferably a reduction or melting furnace Expired DE888731C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED10340A DE888731C (en) 1951-10-03 1951-10-03 Electric furnace that works with electrodes, preferably a reduction or melting furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED10340A DE888731C (en) 1951-10-03 1951-10-03 Electric furnace that works with electrodes, preferably a reduction or melting furnace

Publications (1)

Publication Number Publication Date
DE888731C true DE888731C (en) 1953-09-03

Family

ID=7033231

Family Applications (1)

Application Number Title Priority Date Filing Date
DED10340A Expired DE888731C (en) 1951-10-03 1951-10-03 Electric furnace that works with electrodes, preferably a reduction or melting furnace

Country Status (1)

Country Link
DE (1) DE888731C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0183654A2 (en) * 1984-09-18 1986-06-04 ELETTROCARBONIUM S.p.A. Rotating carbon or graphite electrode column to be used both in open- and submerged-arc furnaces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0183654A2 (en) * 1984-09-18 1986-06-04 ELETTROCARBONIUM S.p.A. Rotating carbon or graphite electrode column to be used both in open- and submerged-arc furnaces
EP0183654A3 (en) * 1984-09-18 1987-01-07 ELETTROCARBONIUM S.p.A. Rotating carbon or graphite electrode column to be used both in open- and submerged-arc furnaces

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