EP0044512B1 - Verfahren und Vorrichtung zum Kühlen von Gefässteilen eines metallurgischen Ofens, insbesondere eines Lichtbogenofens - Google Patents

Verfahren und Vorrichtung zum Kühlen von Gefässteilen eines metallurgischen Ofens, insbesondere eines Lichtbogenofens Download PDF

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Publication number
EP0044512B1
EP0044512B1 EP81105529A EP81105529A EP0044512B1 EP 0044512 B1 EP0044512 B1 EP 0044512B1 EP 81105529 A EP81105529 A EP 81105529A EP 81105529 A EP81105529 A EP 81105529A EP 0044512 B1 EP0044512 B1 EP 0044512B1
Authority
EP
European Patent Office
Prior art keywords
cooling
heat exchange
cooling fluid
exchange surface
furnace
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
EP81105529A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0044512A1 (de
Inventor
Werner Dr. Marnette
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.)
Primetals Technologies Germany GmbH
Original Assignee
Fuchs Systemtechnik 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6107637&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0044512(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fuchs Systemtechnik GmbH filed Critical Fuchs Systemtechnik GmbH
Priority to AT81105529T priority Critical patent/ATE6095T1/de
Publication of EP0044512A1 publication Critical patent/EP0044512A1/de
Application granted granted Critical
Publication of EP0044512B1 publication Critical patent/EP0044512B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • 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
    • H05B7/02—Details
    • H05B7/06—Electrodes
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/001—Cooling of furnaces the cooling medium being a fluid other than a gas
    • F27D2009/0013—Cooling of furnaces the cooling medium being a fluid other than a gas the fluid being water
    • F27D2009/0016—Water-spray
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/0002—Cooling of furnaces
    • F27D2009/004—Cooling of furnaces the cooling medium passing a waterbox

Definitions

  • the invention relates to a method according to the preamble of patent claim 1. Furthermore, it relates to a device according to the preamble of patent claim 8.
  • Evaporative cooling systems of this type which always operate at high system pressures, cannot be used in batch-operated electric furnaces, since heat flows which fluctuate spatially and temporally significantly during the melting process have to be dissipated over the outer surfaces of an electric furnace.
  • the object of the invention is to achieve good cooling over the entire heat exchange surface in a method or a device of the type mentioned in the introduction, despite strong local and temporal fluctuations in the thermal stress, utilizing the evaporation enthalpy. Despite the local and temporal fluctuations in the thermal stress, film boiling, which leads to an inadmissibly high local thermal stress on the heat exchange wall, should be reliably prevented.
  • the aim of the invention is also an apparatus for performing the method.
  • the cooling system according to the invention operates at normal pressure or a pressure slightly above 1 bar and ensures adaptation to the transient operating states of an electric furnace without dangerous cooling water accumulations occurring on the furnace vessel wall.
  • this technology can achieve cooling water consumption of 0.6 1 water / M2 - min.
  • Precision nozzles for example hollow cone, full cone or pneumatic atomizer nozzles, are suitable for generating finely distributed water flows.
  • Vibrating-mechanical atomizing devices that are excited, for example, with ultrasound can also be used.
  • the coolant is preferably applied to the surface to be cooled with a constant jet width, a constant drop spectrum (0-100 ⁇ m) and a constant drop speed (20-40 m / sec).
  • FIG. 1 shows an evaporative cooling system 1 with a closed coolant circuit.
  • the system pressure is approximately 1 bar.
  • the cooling water is applied through atomizing nozzles 3 in finely divided droplet form 4 to the surface 2 to be cooled.
  • the surface 2 to be cooled and a fastening surface 26 for the nozzles 3 form a space which is closed off from the outside.
  • the saturated steam generated during evaporation is fed to the condenser 6 by means of a saturated steam pump 5 through a saturated steam line 22.
  • the resulting condensed coolant is collected in a container 7 and pumped into a pressure container 18 with a liquid pump 8.
  • the pressure vessel 18 ensures a largely constant liquid pressure in the feed line 19.
  • Parts of the coolant that condense in an uncontrolled manner are fed to the container 7 through a condensate return line 9.
  • the temperature of the surface 2 to be cooled is continuously measured with a large number of independent thermal sensors 10. If the lower limit temperature, which corresponds to the boiling temperature of the water, is exceeded locally or over a large area, the corresponding spatially assigned atomizing nozzles are actuated by opening the valves 20.
  • the cooling water is then applied to the surface 2 with a constant volume flow until the lower limit temperature is reached.
  • the mode of operation of the atomizing nozzles 3 is thus intermittent.
  • the nozzle switch-on times can be controlled by a microprocessor 21, which processes the numerous temperature measurement values and converts them into corresponding commands for the valve actuators.
  • FIG. 2 shows the application of the cooling method shown in FIG. 1 using the example of the side wall 14 of an electric arc furnace.
  • the cooling system is also used in furnace vessel areas which are below the bath surface 11.
  • the melt 12 is located in a lower part of the furnace vessel, which is bricked up and stamped out with refractory material 13 and which is made of steel and is made of the side wall 14 and the furnace bottom 16.
  • the furnace vessel according to FIG. 2 is bricked up over the bath surface 11.
  • the section of the refractory lining marked with 15 is only partially cooled in conventional water-cooled walls for safety reasons, namely from above to the bath surface 11.
  • the bottom electrode 17 is in electrical contact with the electrically conductive melt 12 via a solidified partial quantity 23 of the melt and serves to dissipate the electrical current from the melt 12 which generally serves as an anode in direct current and plasma furnaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Discharge Heating (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
EP81105529A 1980-07-19 1981-07-14 Verfahren und Vorrichtung zum Kühlen von Gefässteilen eines metallurgischen Ofens, insbesondere eines Lichtbogenofens Expired EP0044512B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81105529T ATE6095T1 (de) 1980-07-19 1981-07-14 Verfahren und vorrichtung zum kuehlen von gefaessteilen eines metallurgischen ofens, insbesondere eines lichtbogenofens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3027465A DE3027465C1 (de) 1980-07-19 1980-07-19 Verfahren und Vorrichtung zum Kuehlen von Gefaessteilen eines metallurgischen Ofens,insbesondere eines Lichtbogenofens
DE3027465 1980-07-19

Publications (2)

Publication Number Publication Date
EP0044512A1 EP0044512A1 (de) 1982-01-27
EP0044512B1 true EP0044512B1 (de) 1984-02-01

Family

ID=6107637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105529A Expired EP0044512B1 (de) 1980-07-19 1981-07-14 Verfahren und Vorrichtung zum Kühlen von Gefässteilen eines metallurgischen Ofens, insbesondere eines Lichtbogenofens

Country Status (6)

Country Link
EP (1) EP0044512B1 (es)
JP (1) JPS5752788A (es)
AT (1) ATE6095T1 (es)
BR (1) BR8104601A (es)
DE (1) DE3027465C1 (es)
ES (1) ES504094A0 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11619450B2 (en) * 2019-09-04 2023-04-04 Systems Spray-Cooled, Inc. Stand alone copper burner panel for a metallurgical furnace

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1257473A (en) * 1984-10-12 1989-07-18 Willard Mcclintock Furnace cooling system and method
NO155903C (no) * 1985-02-07 1987-06-17 Elkem As Sidevegg i en metallurgisk smelteovn.
GB8722354D0 (en) * 1987-09-23 1987-10-28 Davy Mckee Stockton Metallurgical furnace
US4815096A (en) * 1988-03-08 1989-03-21 Union Carbide Corporation Cooling system and method for molten material handling vessels
GB8908997D0 (en) * 1989-04-20 1989-06-07 Davy Mckee Stockton Vessels for containing molten metal
FR2652890B1 (fr) * 1989-10-11 1995-01-20 Siderurgie Fse Inst Rech Dispositif de connexion electrique destine a etre place en paroi d'un recipient metallurgique au contact d'un metal en fusion.
DE4026897C2 (de) * 1990-08-23 1994-05-05 Mannesmann Ag Metallische Bodenelektrode für metallurgische Gefäße
DE4103508A1 (de) * 1991-02-06 1992-08-13 Kortec Ag Verfahren und vorrichtung zur kuehlung von gefaessteilen fuer die durchfuehrung von pyro-verfahren, insbesondere metallurgischer art
GB9322696D0 (en) * 1993-11-03 1993-12-22 Davy Mckee Stockton Cooling of hot bodies
ATA147194A (de) * 1994-07-25 1997-11-15 Voest Alpine Ind Anlagen Verfahren zum kühlen einer heissen oberfläche sowie einrichtung zur durchführung des verfahrens
US5561685A (en) * 1995-04-27 1996-10-01 Ucar Carbon Technology Corporation Modular spray cooled side-wall for electric arc furnaces
DE19529924C1 (de) * 1995-08-01 1996-10-31 Mannesmann Ag Lichtbogenofen und Verfahren zur Vermeidung von Überhitzungen der Ofenwand
FR2842215B1 (fr) 2002-07-09 2004-08-13 Pechiney Aluminium Procede et systeme de refroidissement d'une cuve d'electrolyse pour la production d'aluminium
FR2844582B1 (fr) * 2002-09-16 2005-06-17 H Raymond Guyomarc Systeme de refroidissement regulateur pour la maitrise des temperatures de parois soumises a des productions thermiques
LU91142B1 (fr) * 2005-02-28 2006-08-29 Wurth Paul Sa Electric arc furnace
LU91408B1 (en) * 2008-01-11 2009-07-13 Wurth Paul Sa Cooling of a metallurgical smelting reduction vessel
DE102009031355A1 (de) * 2009-07-01 2011-01-05 Siemens Aktiengesellschaft Verfahren zum Kühlen eines Kühlelements eines Lichtbogenofens, Lichtbogenofen zum Einschmelzen von Metallgut, und Steuer- und/oder Regeleinrichtung für einen Lichtbogenofen

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2275515A (en) * 1939-08-03 1942-03-10 George S Dunham Method of and apparatus for cooling blast furnaces
US2671658A (en) * 1951-02-14 1954-03-09 Meehanite Metal Corp Metal lined cupola
DE1133083B (de) * 1956-07-10 1962-07-12 Strico Ges Fuer Metallurg Schmelzzonenkuehlmantel fuer Schachtoefen
DE1108372B (de) * 1956-11-01 1961-06-08 Josef Cermak Dr Ing Kuehlungseinrichtung fuer thermisch hochbeanspruchte Waende
DE1043591B (de) * 1956-11-09 1958-11-13 Strico Ges Fuer Metallurg Vorrichtung zur Regelung der Kuehlwassermenge
FR1335903A (fr) * 1962-10-11 1963-08-23 Bbc Brown Boveri & Cie Système pour régler la température de l'agent de refroidissement parcourant les organes réfrigérants de la zone de refroidissement d'un four de traitement thermique
JPS505125B1 (es) * 1968-10-22 1975-02-28
DE1934486C3 (de) * 1969-07-08 1984-03-01 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen Einrichtung zur Kühlung hochhitzebeanspruchter Mauerwerksteile, insbesondere von Metallschmelzöfen
US4024764A (en) * 1976-04-22 1977-05-24 Bethlehem Steel Corporation Method and apparatus for measuring product surface temperature in a spray cooling chamber
US4091228A (en) * 1976-05-19 1978-05-23 United States Steel Corporation Water cooled shell for electric arc furnaces
SE410654B (sv) * 1978-02-28 1979-10-22 Asea Ab Likstromsljusbagsugn med minst en katodiskt ansluten elektrod och minst en bottnkontakt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11619450B2 (en) * 2019-09-04 2023-04-04 Systems Spray-Cooled, Inc. Stand alone copper burner panel for a metallurgical furnace

Also Published As

Publication number Publication date
JPS5752788A (en) 1982-03-29
ATE6095T1 (de) 1984-02-15
EP0044512A1 (de) 1982-01-27
DE3027465C1 (de) 1982-03-18
ES8205459A1 (es) 1982-06-16
ES504094A0 (es) 1982-06-16
BR8104601A (pt) 1982-04-06

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