DE506303C - Method of operating an electric melting furnace - Google Patents

Method of operating an electric melting furnace

Info

Publication number
DE506303C
DE506303C DED57312D DED0057312D DE506303C DE 506303 C DE506303 C DE 506303C DE D57312 D DED57312 D DE D57312D DE D0057312 D DED0057312 D DE D0057312D DE 506303 C DE506303 C DE 506303C
Authority
DE
Germany
Prior art keywords
operating
melting furnace
electric melting
electrodes
lid
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
DED57312D
Other languages
German (de)
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.)
Mannesmann Demag AG
Original Assignee
Demag AG
Publication date
Priority to DED57312D priority Critical patent/DE506303C/en
Application granted granted Critical
Publication of DE506303C publication Critical patent/DE506303C/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/08Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces heated electrically, with or without any other source of heat
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B4/00Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
    • C22B4/08Apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00Arrangement of elements for electric heating in or on furnaces
    • F27D11/08Heating by electric discharge, e.g. arc discharge
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00Heating by electric discharge
    • H05B7/18Heating by arc discharge
    • H05B7/20Direct 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)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Description

Verfahren zum Betreiben eines Elektroschmelzofens Um bei Lichtbogenöfen mit annähernd kreisförmigem Herd eine gleichmäßigere Beheizung zu erzielen, ist vorgeschlagen worden, Bad und Elektroden um eine vertikale Achse relativ Zueinander zu drehen. Bei solchen Ofen, bei denen die Elektroden durch den Deckel hindurchtreten, muß natürlich auch der Deckel relativ zum Bade mitgedreht werden. Nach den bisher bekannten Vorschlägen ist dies aber praktisch bei Schmelz-und Raffinieröfen für Eisen und Stahl nicht möglich, da infolge der hohen Temperatur der aus Steinen hergestellte Deckel allmählich abschmilzt, so daß sich an der unteren Seite tropfsteinförmige Zapfen bilden, welche ein 'Drehen des Deckels gegenüber der Ausmauerung des Ofengefäßes praktisch unmöglich machen.Method for operating an electric melting furnace Um in electric arc furnaces to achieve a more even heating with an approximately circular stove It has been proposed that bath and electrodes are about a vertical axis relative to one another to turn. In such ovens, where the electrodes pass through the lid, Of course, the lid must also be rotated relative to the bath. After the so far However, this is practical for smelting and refining furnaces for known proposals Iron and steel not possible, as the one made from stones due to the high temperature Lid gradually melts, so that it is stalactite-shaped on the lower side Form pegs, which rotate the lid with respect to the brick lining of the furnace vessel make it practically impossible.

Nach der Erfindung wird diese Schwierigkeit dadurch vermieden, daß eine Hubvorrichtung für den Deckel vorgesehen wird, so daß der Deckel jedesmal vor Einleitung einer Drehbewegung so weit angelüftet werden kann, daß eine Reibung zwischen Deckel und Ofenmauerwerk vermieden wird.According to the invention, this difficulty is avoided in that a lifting device for the lid is provided so that the lid is in front each time Initiation of a rotary movement can be raised so far that there is friction between Cover and furnace masonry is avoided.

In der Zeichnung ist ein Ofen zur Durchführung des Verfahrens dargestellt, und zwar zeigt Abb. i den Ofen im Längsschnitt, Abb.2 gibt einen Querschnitt durch den Ofen wieder. Im Ausführungsbeispiel ist das Ofengefäß i um den Zapfen 2 drehbar gegenüber dem Deckel 3. Durch diesen sind in bekannter Weise die Elektroden q. hindurchgeführt. Der Deckel 3 hängt an den Zugorganen 5 des Hubwerkes 6. Abb. 2 .läßt das Bad und die Elektroden in der Draufsicht erkennen.The drawing shows a furnace for carrying out the method, namely Fig. i shows the furnace in longitudinal section, Fig.2 gives a cross section the oven again. In the exemplary embodiment, the furnace vessel i can be rotated about the pin 2 compared to the cover 3. By this, the electrodes q. passed through. The cover 3 hangs on the pulling elements 5 of the lifting mechanism 6. Fig. 2 leaves the bath and recognize the electrodes in plan view.

Sobald im Elektroofen, wie Abb. 2 zeigt, sich um die Elektroden q. ein flüssiges Bad 7 in der bekannten Form gebildet hat, so daß die festen Schrottberge 8 noch stehen, wird der Deckel 3 mittels des Hubwerkes 6 etwas angelüftet und dann das Ofengefäß i ungefähr um einen Winkel von 30° gedreht, so daß die Elektroden in die punktierte Stellung kommen, wodurch die Schrotthaufen 8 nunmehr auch rasch durch direkte Einwirkung des Lichtbogens geschmolzen werden.As soon as in the electric furnace, as shown in Fig. 2, the electrodes q. has formed a liquid bath 7 in the known form, so that the solid mountains of scrap 8 are still standing, the cover 3 is slightly lifted by means of the lifting mechanism 6 and then the furnace vessel i rotated approximately through an angle of 30 ° so that the electrodes come into the dotted position, whereby the scrap pile 8 now also quickly be melted by direct action of the electric arc.

Claims (1)

PATENTANSPRUCH: . Verfahren zum Betreiben eines Elektroschmelzofens mit durch den Deckel geführten Elektroden und einer Anordnung zum Drehen der Elektroden und des Deckels um eine lotrechte Achse relativ zum Bade, dadurch gekennzeichnet, daß der Ofendeckel vor jeder Teildrehung durch ein besonderes Hubwerk angelüftet und nach erfolgter Drehung wieder auf den Ofen abgesetzt wird.' .PATENT CLAIM:. Method of operating an electric melting furnace with electrodes guided through the cover and an arrangement for rotating the electrodes and of the lid about a vertical axis relative to the bath, characterized in that that the furnace lid is lifted by a special lifting mechanism before each partial rotation and is placed back on the oven after rotation. ' .
DED57312D Method of operating an electric melting furnace Expired DE506303C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED57312D DE506303C (en) Method of operating an electric melting furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED57312D DE506303C (en) Method of operating an electric melting furnace

Publications (1)

Publication Number Publication Date
DE506303C true DE506303C (en) 1930-09-02

Family

ID=7057113

Family Applications (1)

Application Number Title Priority Date Filing Date
DED57312D Expired DE506303C (en) Method of operating an electric melting furnace

Country Status (1)

Country Link
DE (1) DE506303C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE970588C (en) * 1954-03-27 1958-10-09 Demag Elektrometallurgie Gmbh Method for operating electric melting furnaces
DE972100C (en) * 1951-03-11 1959-05-21 Demag Elektrometallurgie Gmbh Electric reduction or smelting furnace
DE973715C (en) * 1952-08-31 1960-05-19 Demag Elektrometallurgie Gmbh Electric arc or reduction furnace
WO2012156108A1 (en) * 2011-05-13 2012-11-22 Sms Siemag Ag Reduction furnace

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972100C (en) * 1951-03-11 1959-05-21 Demag Elektrometallurgie Gmbh Electric reduction or smelting furnace
DE973715C (en) * 1952-08-31 1960-05-19 Demag Elektrometallurgie Gmbh Electric arc or reduction furnace
DE970588C (en) * 1954-03-27 1958-10-09 Demag Elektrometallurgie Gmbh Method for operating electric melting furnaces
WO2012156108A1 (en) * 2011-05-13 2012-11-22 Sms Siemag Ag Reduction furnace
RU2551738C1 (en) * 2011-05-13 2015-05-27 Смс Зимаг Аг Reducing furnace
CN103717988B (en) * 2011-05-13 2016-06-08 Sms集团有限责任公司 Reduction furnace

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