EP0196432B1 - Four à arc - Google Patents

Four à arc Download PDF

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Publication number
EP0196432B1
EP0196432B1 EP86101929A EP86101929A EP0196432B1 EP 0196432 B1 EP0196432 B1 EP 0196432B1 EP 86101929 A EP86101929 A EP 86101929A EP 86101929 A EP86101929 A EP 86101929A EP 0196432 B1 EP0196432 B1 EP 0196432B1
Authority
EP
European Patent Office
Prior art keywords
furnace
furnace vessel
casing portion
electric arc
lower casing
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
EP86101929A
Other languages
German (de)
English (en)
Other versions
EP0196432A1 (fr
Inventor
Horst Dipl.-Ing. Willaschek
Heinz Dipl.-Ing. Berentsen
Norbert Jäger
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.)
MAN Gutehoffnungshutte GmbH
Original Assignee
MAN Gutehoffnungshutte 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 MAN Gutehoffnungshutte GmbH filed Critical MAN Gutehoffnungshutte GmbH
Priority to AT86101929T priority Critical patent/ATE52846T1/de
Publication of EP0196432A1 publication Critical patent/EP0196432A1/fr
Application granted granted Critical
Publication of EP0196432B1 publication Critical patent/EP0196432B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • F27B3/24—Cooling arrangements

Definitions

  • the invention relates to an electric arc furnace with a vessel shell upper part, which at least partially consists of a lining with water-cooled wall elements, and with a vessel shell lower part with refractory lining, the vessel shell having vertical ribs on its outer, cylindrical surface.
  • Arc furnaces with pouring spouts or floor tapping are nowadays operated with high electrical outputs and short batch times.
  • This method of furnace requires the use of highly wear-resistant brick lining or water-cooled wall elements and water-cooled lids.
  • the lining in the electric arc furnace, especially in the area directly above the slag zone and at the hot spots, is consequently exposed to an increasing load, which results in earlier wear and thus forces the worn parts to be replaced more often.
  • US-A-2 711 311 is concerned with a water cooling system for blast furnaces.
  • Vertical ribs are provided on the outer shell of the furnace, which are connected in one piece to the furnace shell.
  • Weirs in the form of angle plates are provided between the vertical ribs to control the flow of the cooling water.
  • BE-A-556 212 relates to a cooling method for a brick shaft furnace.
  • the furnace has outer metallic cooling fins.
  • EP-A-0 116 696 describes a vessel for an electric furnace, equipped in the upper area with removable cooling units for water and evaporative cooling. Vessel supports connected to the supporting structure of the lower vessel are distributed around the circumference of the vessel.
  • DE-C-312 905 a fitting for a Martinofen is described, which is provided with ribs, the main direction of which can be arranged parallel or overlapping. This is to ensure that the masonry of the furnace gives off its heat to the surface of the fitting which is enlarged by the ribs.
  • the object of the invention is to provide an arc furnace with a vessel shell upper part, which at least partially consists of a lining with water-cooled wall elements, and with a vessel shell lower part with a fireproof lining, the vessel shell having vertical ribs on its outer, cylindrical surface Design that the use of the optimized stone qualities mentioned above is made possible without the disadvantages mentioned.
  • the heat-emitting surface is enlarged, so that heat accumulation in the vessel jacket is prevented.
  • the vertical arrangement of the ribs proves to be particularly advantageous in that a natural, directed air flow with good convection can be achieved and the radial thermal expansion of the vessel jacket is not hindered.
  • the ribs can be welded over their entire surface to the lower part of the vessel jacket, which means a welded connection over the entire end face of the ribs which abut the vessel jacket.
  • it can also be expedient to weld the ribs to the vessel jacket with continuous or interrupted fillet welds.
  • Ribs can be made from sheet metal strips, section steels (e.g. L, T, U sections etc.) or hollow sections. Steel, cast steel, cast iron, non-ferrous metal or composite metal can be used as the material for producing the ribs.
  • the lower part of the vessel jacket can also be produced in such a way that it consists of several jacket segments which are connected by welding T, U or L profiles together.
  • the ribs arranged on the lower part of the vessel jacket can, which has been found to be particularly advantageous, be designed in such a way that their shape forms completely or partially closed vertical cooling channels, which can be extended to below the furnace platform.
  • the annular gap between the tilting platform of the furnace and the furnace vessel jacket so large that the width of the annular gap matches the dimensions of the cooling channels formed by the ribs on the vessel jacket.
  • the air conversion to improve the convection on the arc furnace wall can possibly be further improved if external ventilation is provided by fans.
  • the refractory bricks with high heat transfer according to the claims are, for example, carbon bricks.
  • Fig. 2 to 7 detail horizontal sections of the furnace vessel jacket.
  • the upper part and lower part are separated from the wall elements and the brickwork in the transition area to ensure independent working in the event of temperature stress between the two parts.
  • the upper and lower parts of the vessel jacket are detachably connected to one another by screw connections (not shown).
  • the vertical ribs 7 with which this jacket part is provided all around can be seen on the vessel jacket lower part 3. These ribs 7 serve to enlarge the heat-emitting surface and, in this respect, are intended to avoid heat accumulation in the vessel jacket.
  • the supports of the furnace support frame are designated 4.
  • Stiffening rings 11, which are connected to the furnace support frame 4, are placed around the lower vessel part 3.
  • rib 7 on the right, which is welded to the vessel jacket 3 over the entire surface.
  • rib shapes such as 1, L, T profiles, as well as ribs which are formed from half-tubes.
  • Fig. 4 shows a section of the vessel jacket lower part 3 with ribs 7, the jacket with ribs consisting of one piece. They can be manufactured by forging, casting, pressing or mechanical processing from thick-walled blanks.
  • the lower part of the vessel jacket is made by welding T-section steels together, whereby a ribbed vessel jacket is formed.
  • Closed vertical cooling channels 8 can be produced by welding two L-profiles (FIG. 7, left), two T-profiles (FIG. 7, center) or U-profiles (FIG. 7, right).
  • FIG. 6 shows an embodiment in which the lower part 3 of the vessel jacket consists of loosely inserted jacket plates with ribs 7.
  • the jacket sheets only have contact with the furnace support frame 4 via spacer blocks 9.
  • the vertical gap between the jacket sheets serves for radial thermal expansion.
  • FIG. 1 In the enlarged section of FIG. 1 surrounded by a circle, the area of the annular gap 6 between the tilting platform 5 and the lower part 3 of the vessel jacket is shown.
  • a circumferential baffle 10 under the tilting platform 5 serves to guide the cooling air which is to get from below upwards into the cooling channels 8 formed by the ribs 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Discharge Heating (AREA)

Claims (8)

1. Four à arc
- avec une partie supérieure d'enveloppe de cuve composée au moins partiellement d'un revêtement à éléments refroidis à l'eau, et
- avec une partie inférieure d'enveloppe de cuve à revêtement réfractaire, t'enveloppe de cuve présentant sur sa surface cylindrique extérieure des nervures verticales,
caractérisé en ce que
- le revêtement de la partie inférieure d'enveloppe de cuve (3) se compose de briques réfractaires à conductibilité thermique élevée et
- que seule la partie inférieure d'enveloppe de cuve (3) présente des nervures (7) appropriées au refroidissement à l'air, de façon à constituer des canaux de refroidissement (8) complètement ou partiellement fermés, prolongés jusqu'au dessous de la plate-forme de gueulard (5),
- des tôles de guidage (5) en forme d'entonnoir sont disposées pour orienter l'écoulement de l'air, un interstice annulaire (6) étant disponible entre la plate-forme de gueulard basculante (5) et la cuve de four (1),
- les nervures (7) sont soudées sur l'enveloppe de cuve (3) ou fabriquées d'une seule pièce avec celle- ci.
2. Four à arc selon la revendication 1, caractérisé en ce que la partie inférieure d'enveloppe de cuve (3) est composée de plusieurs segments d'enveloppe reliés par soudage de profilés en T et U ou en L rapportés.
3. Four à arc selon la revendication 2, caractérisé en ce que les segments d'enveloppe introduits lâches s'appuient sur le châssis support de la cuve de four (1) par l'intermédiaire de blocs entret. es ois.
4. Four à arc selon la revendication 1, caractérisé en ce que la largeur de l'interstice annulaire (6) correspond au moins à la largeur des canaux de refroidissement (8).
5. Four à arc selon l'une des revendications 1 à 4, caractérisé en ce qu'une ventilation externe est disposée pour produire l'écoulement d'air sur la partie inférieure d'enveloppe de cuve (3) nervurée.
6. Four à arc selon la revendication 1, caractérisé en ce que la partie supérieure d'enveloppe de cuve (2) est séparée de la partie inférieure d'enveloppe de cuve (3) dans la zone de transition située entre les éléments de paroi et le revêtement réfractaire.
7. Four à arc selon la revendication 6, caractérisé en ce que la partie supérieure d'enveloppe de cuve (2) est reliée à la partie inférieure d'enveloppe de cuve (3), aux emplacements de séparation, au moyen de vis, de clavettes ou autres liaisons démontables.
8. Four à arc selon l'une des revendications 1 à 7, caractérisé en ce que les briques réfractaires à conductibilité thermique élevée sont des briques contenant du carbone.
EP86101929A 1985-03-01 1986-02-14 Four à arc Expired - Lifetime EP0196432B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86101929T ATE52846T1 (de) 1985-03-01 1986-02-14 Lichtbogenofen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3507182 1985-03-01
DE19853507182 DE3507182A1 (de) 1985-03-01 1985-03-01 Schmelzgefaess, insbesondere lichtbogenofen

Publications (2)

Publication Number Publication Date
EP0196432A1 EP0196432A1 (fr) 1986-10-08
EP0196432B1 true EP0196432B1 (fr) 1990-05-16

Family

ID=6263853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86101929A Expired - Lifetime EP0196432B1 (fr) 1985-03-01 1986-02-14 Four à arc

Country Status (4)

Country Link
EP (1) EP0196432B1 (fr)
JP (2) JPS61223485A (fr)
AT (1) ATE52846T1 (fr)
DE (2) DE3507182A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3820448A1 (de) * 1988-06-16 1989-12-21 Thyssen Edelstahlwerke Ag Gekuehltes wandelement fuer metallurgische oefen
DE4223109C1 (fr) * 1992-07-14 1993-09-16 Reining Heisskuehlung Gmbh & Co Kg, 4330 Muelheim, De
DE4240667C2 (de) * 1992-11-24 1996-05-09 Mannesmann Ag Stahlwerksanlage mit einem an einem ringförmigen Tragelement befestigten metallurgischen Gefäß
NL1011838C2 (nl) * 1999-04-20 2000-10-23 Hoogovens Technical Services B Koelpaneel voor een schachtoven, schachtoven voorzien van dergelijke koelpanelen en een werkwijze voor de vervaardiging van zo'n koelpaneel.
RU2478176C2 (ru) * 2011-06-15 2013-03-27 Закрытое Акционерное Общество "Пиккерама" Камерная печь сопротивления из фосфатных бетонов
DE102014223581A1 (de) 2014-07-09 2016-01-14 Sms Group Gmbh Kühlvorrichtung, metallurgische Ofenvorrichtung und Verfahren zum Kühlen eines metallurgischen Gefäßes

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE556212A (fr) *
DE312905C (fr) *
US2711311A (en) * 1954-01-27 1955-06-21 United States Steel Corp Cooling system for blast furnace
DE1433509A1 (de) * 1963-09-24 1968-12-19 Didier Werke Ag Herdraumwaende,insbesondere Rueckwaende von Industrieoefen,z.B. Siemens-Martin-OEfen
DE6803953U (de) * 1968-10-25 1969-03-06 Rheinstahl Huettenwerke Ag Elektrolichtbogenofen aus einem blechmantel und feuerfester auskleidung
US3518349A (en) * 1968-12-03 1970-06-30 Gen Refractories Co Perforated or ventilated shell for electric arc furnnaces
JPS557827Y2 (fr) * 1974-01-23 1980-02-21
PL95965B1 (pl) * 1974-11-26 1977-11-30 Chlodnica zwlaszcza wielkopiecowa oraz sposob wykonania chlodnicy zwlaszcza wielkopiecowej
US4085924A (en) * 1977-07-15 1978-04-25 Pennsylvania Engineering Corporation Cooling assembly for metallurgical vessels
DE2829453A1 (de) * 1978-06-27 1980-01-10 Bbc Brown Boveri & Cie Kessel eines lichtbogenofens
DE2907511C2 (de) * 1979-02-26 1986-03-20 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Kühlplatte für Schachtöfen, insbesondere Hochöfen, und Verfahren zur Herstellung derselben
DE2924991C2 (de) * 1979-06-21 1982-12-23 Ferdinand Lentjes, Dampfkessel- und Maschinenbau, 4000 Düsseldorf Wassergekühltes Ofenwandelement
JPS5728073U (fr) * 1980-07-25 1982-02-13
DE8235356U1 (de) * 1982-12-16 1983-05-11 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen Gefaess fuer einen schmelzofen

Also Published As

Publication number Publication date
ATE52846T1 (de) 1990-06-15
EP0196432A1 (fr) 1986-10-08
DE3671286D1 (de) 1990-06-21
DE3507182A1 (de) 1986-09-04
DE3507182C2 (fr) 1988-05-05
JPS63165491U (fr) 1988-10-27
JPS61223485A (ja) 1986-10-04

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