EP0897017B1 - Four vertical de traitement thermique de bandes métalliques - Google Patents

Four vertical de traitement thermique de bandes métalliques Download PDF

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Publication number
EP0897017B1
EP0897017B1 EP98890147A EP98890147A EP0897017B1 EP 0897017 B1 EP0897017 B1 EP 0897017B1 EP 98890147 A EP98890147 A EP 98890147A EP 98890147 A EP98890147 A EP 98890147A EP 0897017 B1 EP0897017 B1 EP 0897017B1
Authority
EP
European Patent Office
Prior art keywords
muffle
furnace
heat treatment
metal strips
plug
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
EP98890147A
Other languages
German (de)
English (en)
Other versions
EP0897017A1 (fr
Inventor
Peter Helmut Dipl.-Ing. Ebner
Heribert Dipl.-Ing. Lochner
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0897017A1 publication Critical patent/EP0897017A1/fr
Application granted granted Critical
Publication of EP0897017B1 publication Critical patent/EP0897017B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0043—Muffle furnaces; Retort furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/66—Tower-type furnaces

Definitions

  • the invention relates to a tower furnace for the heat treatment of metal strips with the belt running through the entire furnace height Muffle.
  • Metal strips in particular made of Cr-Ni steel or Cr steel, have hitherto been continuously bright annealed in so-called door furnaces, the heat treatment taking place under a protective gas consisting of H 2 or H 2 / N 2 mixture.
  • the strip is heated by radiation in a muffle heated on the outside and subsequently cooled in a cooling system. Both gas burners and electrical resistance heating elements can be used to heat the muffle.
  • the furnace temperature is due to the material used Limited muffle.
  • the strip heating is therefore from the muffle counter temperature dependent and runs according to one of the emission factors of the band and the muffle certain function.
  • the muffle length results from the tear length of the used Material, d. H. that the weight of the muffle leads to their destruction can.
  • the furnace In order to bring the strip temperature close to the maximum muffle temperature, it is known to make the furnace divided.
  • the strip is preheated in a lower, usually gas-heated, furnace provided with a glow muffle and then passes through a muffle-free, electrically heated furnace arranged above it, which can be operated at higher temperatures. Since part of the oven is designed to be muffle, there is an extended rinsing time. H 2 operation results in higher energy losses on the outer wall of the oven. Compared to air or smoke gases, the heat transfer in the insulating bodies, for. B. masonry or ceramic wool, significantly increased by H 2 . Since two stoves arranged one above the other are provided, there is a reduction in the heating performance of the entire stove at the flange points of the two stoves, apart from the increased construction costs.
  • the invention has for its object a tower furnace of the aforementioned To create the way in which the desired strip end temperature is reached without the Exceeding the tear length of the muffle and without the band heating due to colder Oven parts delayed.
  • the invention solves this problem in that an insulated plug with electrical Heating is inserted into the top of the muffle, whereas one is preferably under the plug gas-heated preheating room.
  • the furnace can be brightly glowed even after a long interruption in production with a normal addition of H 2 .
  • the energy losses are negligible due to the slightly reduced temperature of the muffle outer wall in the plug area.
  • this lowering of the temperature there is at the same time an increase in the strength of the material, which in turn allows the muffle to be lengthened, with no risk that the tear length of the muffle will be exceeded.
  • the drawing shows an exemplary embodiment of a tower furnace schematically in longitudinal section.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Details (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (1)

  1. Four vertical de traitement thermique de bandes métalliques, avec un moufle (3) s'étendant sur toute la hauteur du four, traversé pas la bande (6) lors de son passage, caractérisé par le fait qu'un obturateur (1) isolé, muni d'un élément de chauffage électrique (2) est installé en partie haute dans le moufle (3), alors que, par contre, une enceinte de préchauffage (4), de préférence chauffée au gaz, est ménagée au-dessous de l'obturateur (1).
EP98890147A 1997-06-10 1998-05-20 Four vertical de traitement thermique de bandes métalliques Expired - Lifetime EP0897017B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0099997A AT405055B (de) 1997-06-10 1997-06-10 Turmofen zur wärmebehandlung von metallbändern
AT99997 1997-06-10
AT999/97 1997-06-10

Publications (2)

Publication Number Publication Date
EP0897017A1 EP0897017A1 (fr) 1999-02-17
EP0897017B1 true EP0897017B1 (fr) 2001-10-31

Family

ID=3504621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98890147A Expired - Lifetime EP0897017B1 (fr) 1997-06-10 1998-05-20 Four vertical de traitement thermique de bandes métalliques

Country Status (8)

Country Link
US (1) US6031206A (fr)
EP (1) EP0897017B1 (fr)
JP (1) JP4077930B2 (fr)
KR (1) KR19990006771A (fr)
AT (2) AT405055B (fr)
DE (1) DE59801932D1 (fr)
ES (1) ES2167060T3 (fr)
TW (1) TW410239B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT408452B (de) * 2000-06-29 2001-12-27 Ebner Peter Dipl Ing Turmofen zur wärmebehandlung von metallbändern
AT507670B1 (de) * 2009-07-03 2010-07-15 Ebner Ind Ofenbau Turmofen zur wärmebehandlung eines metallbands
JP5550924B2 (ja) * 2010-01-26 2014-07-16 光洋サーモシステム株式会社 連続加熱式マッフル炉

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE652552C (de) * 1937-11-02 Siemens Schuckertwerke Akt Ges Turmofen mit einem das Durchziehgut umschliessenden gasdichten Innenmantel
US2104886A (en) * 1934-04-30 1938-01-11 Firm Heraeus Vacuumschmelze Ag Electrically heated annealing furnace
FR836893A (fr) * 1937-04-20 1939-01-27 Roechlingsche Eisen & Stahl Four à recuire en blanc
US3823003A (en) * 1970-04-14 1974-07-09 Dow Chemical Co Preparation of metals
US4299565A (en) * 1977-07-25 1981-11-10 Kawasaki Steel Corporation Heating furnace
US4229163A (en) * 1977-07-25 1980-10-21 Kawasaki Steel Corporation Heating furnace
JPS5811493B2 (ja) * 1978-12-29 1983-03-03 新日本製鐵株式会社 冷延鋼帯の連続焼鈍設備
EP0181830B1 (fr) * 1984-11-08 1991-06-12 Mitsubishi Jukogyo Kabushiki Kaisha Procédé et dispositif pour chauffer un ruban métallique dans un four de recuit continu
JPS61157641A (ja) * 1984-12-28 1986-07-17 Chugai Ro Kogyo Kaisha Ltd 金属ストリツプ用連続焼鈍炉
AU598981B2 (en) * 1985-07-18 1990-07-05 Nippon Kokan Kabushiki Kaisha Continuous strip steel processing line having direct firing furnace
WO1994008190A1 (fr) * 1992-10-05 1994-04-14 Acon Finland Oy Ltd Procede et appareil d'ameliorations des performances d'un four de chauffage pour brames metalliques
JP2815086B2 (ja) * 1994-02-21 1998-10-27 住友金属工業株式会社 鋼帯の竪型連続焼鈍炉
JP3356864B2 (ja) * 1994-03-31 2002-12-16 中外炉工業株式会社 鋼帯用竪型連続光輝焼鈍炉の加熱帯
JPH08260059A (ja) * 1995-03-17 1996-10-08 Nippon Steel Corp 雰囲気制御能力が優れた連続焼鈍炉
NL1002856C2 (nl) * 1996-04-12 1997-10-15 Thermtec B V Verticale gloeioven voor een bandbehandelingsinstallatie.

Also Published As

Publication number Publication date
TW410239B (en) 2000-11-01
US6031206A (en) 2000-02-29
ATA99997A (de) 1998-09-15
KR19990006771A (ko) 1999-01-25
ATE207973T1 (de) 2001-11-15
ES2167060T3 (es) 2002-05-01
JPH1150156A (ja) 1999-02-23
AT405055B (de) 1999-05-25
JP4077930B2 (ja) 2008-04-23
EP0897017A1 (fr) 1999-02-17
DE59801932D1 (de) 2001-12-06

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