EP0196432B1 - Four à arc - Google Patents
Four à arc Download PDFInfo
- 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
Links
Images
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
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- 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)
caractérisé en ce que
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)
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)
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 |
DE7820149U1 (de) * | 1978-06-27 | 1980-04-03 | Bbc Ag Brown, Boveri & Cie, Baden, Aargau (Schweiz) | 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 |
-
1985
- 1985-03-01 DE DE19853507182 patent/DE3507182A1/de active Granted
-
1986
- 1986-02-14 DE DE8686101929T patent/DE3671286D1/de not_active Expired - Fee Related
- 1986-02-14 AT AT86101929T patent/ATE52846T1/de not_active IP Right Cessation
- 1986-02-14 EP EP86101929A patent/EP0196432B1/fr not_active Expired - Lifetime
- 1986-02-27 JP JP61040523A patent/JPS61223485A/ja active Pending
-
1987
- 1987-09-25 JP JP1987145323U patent/JPS63165491U/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS61223485A (ja) | 1986-10-04 |
JPS63165491U (fr) | 1988-10-27 |
EP0196432A1 (fr) | 1986-10-08 |
DE3671286D1 (de) | 1990-06-21 |
DE3507182A1 (de) | 1986-09-04 |
DE3507182C2 (fr) | 1988-05-05 |
ATE52846T1 (de) | 1990-06-15 |
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