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EP0044512A1 - Procédé et dispositif pour le refroidissement des parties de la cuve d'un four métallurgique, en particulier d'un four à arc électrique - Google Patents

Procédé et dispositif pour le refroidissement des parties de la cuve d'un four métallurgique, en particulier d'un four à arc électrique Download PDF

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Publication number
EP0044512A1
EP0044512A1 EP81105529A EP81105529A EP0044512A1 EP 0044512 A1 EP0044512 A1 EP 0044512A1 EP 81105529 A EP81105529 A EP 81105529A EP 81105529 A EP81105529 A EP 81105529A EP 0044512 A1 EP0044512 A1 EP 0044512A1
Authority
EP
European Patent Office
Prior art keywords
cooling
heat exchange
exchange surface
furnace
cooling liquid
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.)
Granted
Application number
EP81105529A
Other languages
German (de)
English (en)
Other versions
EP0044512B1 (fr
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
Korf and 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(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fuchs Systemtechnik GmbH, Korf and Fuchs Systemtechnik GmbH filed Critical Fuchs Systemtechnik GmbH
Priority to AT81105529T priority Critical patent/ATE6095T1/de
Publication of EP0044512A1 publication Critical patent/EP0044512A1/fr
Application granted granted Critical
Publication of EP0044512B1 publication Critical patent/EP0044512B1/fr
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; Electric arc furnaces ; Tank furnaces
    • F27B3/10—Details, accessories or equipment, e.g. dust-collectors, specially adapted for 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 are already used in a variety of ways in technical facilities. In metallurgical furnaces, this cooling technology is used on blast furnaces, for example. These ovens are due to the continuous process control by largely stationary loading drive states and thus supply almost constant heat flow densities on the heat exchange surfaces. These blast furnace cooling systems can thus be operated like generally known waste heat recovery systems. 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. In spite of 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.
  • evaporative cooling can also be used by the invention for cooling the outer surfaces of an electric furnace.
  • An important feature of this invention is that electric furnaces can also be cooled below the melting and slag zone with very little cooling water consumption, without any impairment operational safety is given.
  • 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 / m 2 ⁇ 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, constant drop spectrum (0-100 ⁇ m) and 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.
  • the temperature of the surface 2 to be cooled is continuously measured with a large number of independent thermal sensors 10. With a local or large area If the lower limit temperature, which corresponds to the boiling point of the water, is exceeded, 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.
  • the nozzles can be controlled individually in furnace regions which are exposed to heat flows which fluctuate widely in space and time, as shown in FIG. 1. In areas with uniform heat loads, several nozzles are controlled in groups.
  • 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 refractory material bricked and rammed out from the side wall 14 and the furnace bottom 16 formed furnace bottom, which is made of steel.
  • the furnace vessel according to FIG. 2 is bricked up to above 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 isotherm of the lower reaction limit temperature for the chemical wear reactions is moved sufficiently far to the side of the refractory lining facing the bath 12, so that a sufficient residual stone thickness and thus an increased service life of the lining is achieved.
  • FIG. 3 shows the application of the cooling method shown in FIG. 1 using the example of an electrode 17 inserted in the bottom 16 of an electric furnace.
  • the bottom electrode 17 consists of a material with low specific electrical resistance and good thermal conductivity.
  • copper was mainly used as the electrode material.
  • the bottom electrode 17 is in electrical contact with the electrically conductive melt 12 via a solidified portion 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.
  • cooling in accordance with the inventive concept presented here in addition to a reduction in the cooling water consumption figures, in particular leads to a significant increase in operational and occupational safety.
  • the bottom electrode is fastened interchangeably in the cylindrical holder 25.

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 Procédé et dispositif pour le refroidissement des parties de la cuve d'un four métallurgique, en particulier d'un four à arc électrique Expired EP0044512B1 (fr)

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
DE3027465 1980-07-19
DE3027465A DE3027465C1 (de) 1980-07-19 1980-07-19 Verfahren und Vorrichtung zum Kuehlen von Gefaessteilen eines metallurgischen Ofens,insbesondere eines Lichtbogenofens

Publications (2)

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

Family

ID=6107637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105529A Expired EP0044512B1 (fr) 1980-07-19 1981-07-14 Procédé et dispositif pour le refroidissement des parties de la cuve d'un four métallurgique, en particulier d'un four à arc électrique

Country Status (6)

Country Link
EP (1) EP0044512B1 (fr)
JP (1) JPS5752788A (fr)
AT (1) ATE6095T1 (fr)
BR (1) BR8104601A (fr)
DE (1) DE3027465C1 (fr)
ES (1) ES8205459A1 (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3603783A1 (de) * 1985-02-07 1986-08-07 Elkem As Seitenwand fuer einen metallurgischen schmelzofen
EP0197137A4 (fr) * 1984-10-12 1988-02-18 Ronald G Heggart Procede et systeme de refroidissement d'un four.
WO1989003011A1 (fr) * 1987-09-23 1989-04-06 Davy Mckee (Stockton) Limited Recipient destine a contenir du metal en fusion
EP0335042A1 (fr) * 1988-03-08 1989-10-04 Ucar Carbon Technology Corporation Système de refroidissement et méthode pour le maniement de poches contenant des matériaux liquides
EP0393970A3 (en) * 1989-04-20 1990-12-19 Davy Mckee (Stockton) Limited Cooling of hot bodies
FR2652890A1 (fr) * 1989-10-11 1991-04-12 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.
EP0472254A3 (en) * 1990-08-23 1992-04-29 Mannesmann Aktiengesellschaft Metallurgical vessel with metal electrode
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
WO1995012797A1 (fr) * 1993-11-03 1995-05-11 Davy Mckee (Stockton) Limited Refroidissement de corps chauds
EP0740121A1 (fr) * 1995-04-27 1996-10-30 Ucar Carbon Technology Corporation Agencement d'une paroi latérale de four à arc
US5653936A (en) * 1994-07-25 1997-08-05 Voest-Alpine Industrieanlagenbau Gmbh Method of cooling a hot surface and an arrangement for carrying out the method
WO2006089971A3 (fr) * 2005-02-28 2006-11-23 Wurth Paul Sa Four electrique a arc
US7527715B2 (en) 2002-07-09 2009-05-05 Aluminum Pechiney Method and system for cooling an electrolytic cell for aluminum production
LU91408B1 (en) * 2008-01-11 2009-07-13 Wurth Paul Sa Cooling of a metallurgical smelting reduction vessel
US7644752B2 (en) 2002-09-16 2010-01-12 Bio 3D Applications Regulating heat exchange and cooling method and system for monitoring and controlling the temperatures of walls subjected to high temperatures
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
IT202300023610A1 (it) * 2023-11-09 2025-05-09 Danieli Off Mecc Apparato di raffreddamento per un forno metallurgico e relativo forno
EP4551741A1 (fr) 2022-07-08 2025-05-14 Enpot Holdings Limited Procédé et appareil de fusion d'aluminium

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19529924C1 (de) * 1995-08-01 1996-10-31 Mannesmann Ag Lichtbogenofen und Verfahren zur Vermeidung von Überhitzungen der Ofenwand
US11619450B2 (en) * 2019-09-04 2023-04-04 Systems Spray-Cooled, Inc. Stand alone copper burner panel for a metallurgical furnace

Citations (7)

* 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
DE1043591B (de) * 1956-11-09 1958-11-13 Strico Ges Fuer Metallurg Vorrichtung zur Regelung der Kuehlwassermenge
DE1133083B (de) * 1956-07-10 1962-07-12 Strico Ges Fuer Metallurg Schmelzzonenkuehlmantel fuer Schachtoefen
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
US3652070A (en) * 1968-10-22 1972-03-28 Mitsubishi Heavy Ind Ltd Cooling assembly for blast furnace shells
US4024764A (en) * 1976-04-22 1977-05-24 Bethlehem Steel Corporation Method and apparatus for measuring product surface temperature in a spray cooling chamber

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1108372B (de) * 1956-11-01 1961-06-08 Josef Cermak Dr Ing Kuehlungseinrichtung fuer thermisch hochbeanspruchte Waende
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
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

Patent Citations (7)

* 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
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
US3652070A (en) * 1968-10-22 1972-03-28 Mitsubishi Heavy Ind Ltd Cooling assembly for blast furnace shells
US4024764A (en) * 1976-04-22 1977-05-24 Bethlehem Steel Corporation Method and apparatus for measuring product surface temperature in a spray cooling chamber

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197137A4 (fr) * 1984-10-12 1988-02-18 Ronald G Heggart Procede et systeme de refroidissement d'un four.
AU592957B2 (en) * 1984-10-12 1990-02-01 Union Carbide Corporation Furnace cooling by spraying
DE3603783A1 (de) * 1985-02-07 1986-08-07 Elkem As Seitenwand fuer einen metallurgischen schmelzofen
WO1989003011A1 (fr) * 1987-09-23 1989-04-06 Davy Mckee (Stockton) Limited Recipient destine a contenir du metal en fusion
EP0335042A1 (fr) * 1988-03-08 1989-10-04 Ucar Carbon Technology Corporation Système de refroidissement et méthode pour le maniement de poches contenant des matériaux liquides
EP0393970A3 (en) * 1989-04-20 1990-12-19 Davy Mckee (Stockton) Limited Cooling of hot bodies
FR2652890A1 (fr) * 1989-10-11 1991-04-12 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.
EP0423003A1 (fr) * 1989-10-11 1991-04-17 Irsid Sa Dispositif de connexion électrique destiné à être placé en paroi d'un récipient métallurgique au contact d'un métal en fusion
US5125003A (en) * 1989-10-11 1992-06-23 Francaise Institut De Recherches De La Siderurgie Bottom electrode cooled sleeve for a metallurgical container
EP0472254A3 (en) * 1990-08-23 1992-04-29 Mannesmann Aktiengesellschaft Metallurgical vessel with metal electrode
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
US5290016A (en) * 1991-02-06 1994-03-01 Emil Elsner Arrangement for cooling vessel portions of a furnace, in particular a metallurgical furnace
AU679580B2 (en) * 1993-11-03 1997-07-03 Davy Mckee (Stockton) Limited Cooling of hot bodies
WO1995012797A1 (fr) * 1993-11-03 1995-05-11 Davy Mckee (Stockton) Limited Refroidissement de corps chauds
US5797274A (en) * 1993-11-03 1998-08-25 Davy Mckee (Stockton) Limited Cooling of hot bodies
US5653936A (en) * 1994-07-25 1997-08-05 Voest-Alpine Industrieanlagenbau Gmbh Method of cooling a hot surface and an arrangement for carrying out the method
EP0740121A1 (fr) * 1995-04-27 1996-10-30 Ucar Carbon Technology Corporation Agencement d'une paroi latérale de four à arc
US7527715B2 (en) 2002-07-09 2009-05-05 Aluminum Pechiney Method and system for cooling an electrolytic cell for aluminum production
US7644752B2 (en) 2002-09-16 2010-01-12 Bio 3D Applications Regulating heat exchange and cooling method and system for monitoring and controlling the temperatures of walls subjected to high temperatures
RU2398166C2 (ru) * 2005-02-28 2010-08-27 Поль Вурт С.А. Электродуговая печь
WO2006089971A3 (fr) * 2005-02-28 2006-11-23 Wurth Paul Sa Four electrique a arc
WO2009087183A1 (fr) * 2008-01-11 2009-07-16 Paul Wurth S.A. Refroidissement d'un récipient de réduction par fusion métallurgique
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
EP2449136A2 (fr) * 2009-07-01 2012-05-09 Siemens AG Procédé pour refroidir un élément de refroidissement d'un four à arc, four à arc pour faire fondre des produits métalliques et dispositif de commande et/ou de régulation pour un four à arc
EP4551741A1 (fr) 2022-07-08 2025-05-14 Enpot Holdings Limited Procédé et appareil de fusion d'aluminium
IT202300023610A1 (it) * 2023-11-09 2025-05-09 Danieli Off Mecc Apparato di raffreddamento per un forno metallurgico e relativo forno
WO2025099777A1 (fr) * 2023-11-09 2025-05-15 Danieli & C. Officine Meccaniche S.P.A. Appareil de refroidissement pour four métallurgique et four correspondant

Also Published As

Publication number Publication date
JPS5752788A (en) 1982-03-29
ATE6095T1 (de) 1984-02-15
DE3027465C1 (de) 1982-03-18
ES504094A0 (es) 1982-06-16
ES8205459A1 (es) 1982-06-16
EP0044512B1 (fr) 1984-02-01
BR8104601A (pt) 1982-04-06

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