EP1167554A2 - Four du type tour pour le traitement thermique de bandes métalliques - Google Patents

Four du type tour pour le traitement thermique de bandes métalliques Download PDF

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Publication number
EP1167554A2
EP1167554A2 EP01890160A EP01890160A EP1167554A2 EP 1167554 A2 EP1167554 A2 EP 1167554A2 EP 01890160 A EP01890160 A EP 01890160A EP 01890160 A EP01890160 A EP 01890160A EP 1167554 A2 EP1167554 A2 EP 1167554A2
Authority
EP
European Patent Office
Prior art keywords
muffle
section
temperature section
high temperature
metal strip
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
EP01890160A
Other languages
German (de)
English (en)
Other versions
EP1167554B1 (fr
EP1167554A3 (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
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 Individual filed Critical Individual
Publication of EP1167554A2 publication Critical patent/EP1167554A2/fr
Publication of EP1167554A3 publication Critical patent/EP1167554A3/fr
Application granted granted Critical
Publication of EP1167554B1 publication Critical patent/EP1167554B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/562—Details

Definitions

  • the invention relates to a tower furnace for heat treatment of metal strips with a preheating section and one upwards subsequent, forming a separate housing from the preheating section High temperature section, the one with a preferably gas-heated Muffle-equipped preheating section inserted into the top of the muffle Connection plug made of heat-insulating material for the high temperature section having.
  • Metal strips in particular made of chrome or chrome-nickel steel are made of hydrogen or a hydrogen-nitrogen mixture in a protective gas atmosphere continuously annealed in so-called door furnaces, that can be designed with a muffle or muffle-free.
  • the heat treatment of metal bands over a muffle heated from the outside brings the Advantage with itself that gas burners can be used without the Flue gases affect the protective gas atmosphere inside the muffle.
  • the furnace temperature is limited by the heat resistance of the muffle.
  • Muffle-free door stoves have a fire-resistant lining and are electrically heated, so that higher oven temperatures can be reached.
  • the refractory furnace lining is porous, it takes on opening ambient air, for example with a nitrogen gas must be rinsed out before a trouble-free heat treatment the metal strips can be secured under a protective gas atmosphere. Because of the necessary rinsing times, muffle-free door ovens are behind open again after several days. Also poses there is a high consumption of hydrogen, because the after flushing is still existing rest of atmospheric oxygen with the hydrogen of the protective gas Water connects.
  • the muffle High temperature section can be a lower one advantageous for muffle use
  • Purchase temperature of the band to be treated from the muffle be taken so that by the heat and weight loads
  • the restrictions given to the muffle do not affect the result of the heat treatment or can affect throughput.
  • the disadvantage is however, that the muffle-free high-temperature section with its refractory Lining a significantly longer rinsing time compared to muffle furnaces after opening the furnace with a correspondingly increased hydrogen consumption conditionally.
  • the area of the high temperature section on the economically more advantageous gas heating in favor of one complex electrical heating must be dispensed with.
  • the invention is therefore based on the object of a tower furnace To design heat treatment of metal strips of the type described at the beginning, that despite the heat and weight of the muffle given the required strip end temperature can without the use of a muffle-free high temperature section associated disadvantages.
  • the invention achieves the object in that the high temperature section also provided with a preferably gas-heated muffle is, which surrounds the connector plug on the outside and preferably on this gas-tight connection via a liquid seal.
  • the high temperature section also has a muffle, the advantages of a high temperature section Muffle especially with regard to the flushing and the possible gas heating be used to advantage.
  • the muffle load can be caused by the dead weight be limited, which due to the associated lower strength requirements leads to a higher temperature resistance, which the ensures the required final temperature of the metal strips to be treated. It is only for a heat loss-free transition between the preheating and to provide the high temperature section over the plug.
  • the connector plug from the lower end of the muffle of the high-temperature section enclosed on the outside, a gas-tight Connection between connector and muffle of the high temperature section must be achieved, with the possibility of an axial muffle displacement compared to the plug to compensate for thermal expansion the muffle.
  • a known one can advantageously be used Liquid seal can be used.
  • gas-tight Connection via a bellows-like sleeve between the muffle and the plug to reach.
  • the heat insulating, fireproof material of Connection plug has a comparatively small volume, so that the Rinsing process is hardly affected by the plug. Because the connector in the area of heat radiation both the muffle of the preheating section as well as the muffle of the high temperature section, can be from continuous belt heating essentially over the length of the furnace be assumed, which is advantageous to the required total length of the furnace.
  • connection plug In order to prevent unhindered band heating by the connecting plug ensure that the connection plug is sufficient with a to provide a large passage cross section for the metal strips so that the Heat radiation from the two muffles also in the area of the connection plug can extend.
  • the connector plug can Passage cross section for the metal strip to be treated with one half Corresponding outer radius of the plug, perpendicular to the metal band have measured minimum width.
  • the tower furnace shown for the heat treatment of metal strips has a frame 1 which has a housing 2 for a preheating section 3 and a housing 4 for a high-temperature section above the preheating section 3 5 carries. These two furnace sections 3 and 5 are through with each other a connector plug 6 made of a heat-insulating, refractory material connected.
  • the lower preheating section 3 is provided with a muffle 7 is inserted from above into the housing 2 and also removed again upwards can be when the housing 4 of the high temperature section too this purpose is laterally offset in the oven frame 1.
  • For heating the muffle 7 serve conventional gas burners, not shown for reasons of clarity, with the help of the annular space 8 between the muffle 7 and the refractory Lining 9 of the housing 2 is heated.
  • the lower end of the muffle 7 takes place via a stopper 10 in a conventional manner, with gas-tight Connection between muffle 7 and stopper 10 a liquid seal 11 in Form of an annular space surrounding the stopper is provided, which with a sealing liquid, e.g. B. oil, is filled and in the lower end of the muffle 7 protrudes.
  • a sealing liquid e.g. B. oil
  • the high temperature section 5 of the tower furnace designed.
  • the muffle 12 inserted into the housing 4 from above High-temperature section 5 encloses the connector plug with its lower end 6, on the outside of an annular space 13 for a liquid seal 14 carries so that the lower end of the muffle 12 in the bathroom of Liquid seal 14 immersed.
  • This is a gas-tight connection of the muffle 12 to the plug 6 ensured without compensation for thermal expansion to hinder the muffle 12.
  • the muffle 12 is heated again advantageously via gas burners, whose in the annular space 15 between Muffle 12 and housing lining 16 flowing smoke gases the muffle 12 heat.
  • the required final temperature for the to be treated Metal straps can be reached without overloading the muffles 7 and 12 to fear.
  • Due to the lower temperature in the preheating section 3 and the limited length of the muffle 7 results in an advantageous Exploitation of the material properties of the muffle 7, for example a Can have a length of 26 m.
  • the muffle 12 for the high temperature section 5 only needs a length of in the case of the exemplary embodiment To be 10 m, for example, the desired end band temperature To reach 1100 ° C.
  • the muffle 7 Because of the short length of the muffle 12, the Low weight burden, so because of the associated lower strength requirements for the material the temperature load can be enlarged. In comparison, the temperature load the muffle 7 can be kept lower, resulting in the use of higher strength values allowed. This means that the muffle 7 with a length of 26 m has a weight of approx. 17 t for the special steel used, while the Weight of the muffle 12 with a length of 10 m is approximately 7 t. A comparable one Muffle with a total length of 36 m would have a weight of approx. 33 t exhibit. It turns out accordingly that through the training according to the invention a weight saving of almost 30% is possible.
  • the required installation height can be significantly reduced. While for a continuous muffle with a length of 36 m, an expansion height 80 m is required, the expansion height according to the invention only 60 m if the muffle 7 has a length of approx. 26 m and the muffle 12 of 10 m is estimated.
  • the cross section of the passage 17 of the connector plug 6 for the choose a sufficiently large metal band to be treated.
  • a minimum width 18 measured perpendicular to the metal strip which is half the outer radius or a quarter of the outer diameter corresponds to the connector plug 6, as can be seen in FIG. 2 can result in the penetration of the heat radiation Muffle 7 and 12 on the passage 17 of the connector plug 6 advantageous Conditions that have a favorable effect on the overall length of the tower furnace.

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)
  • Tunnel Furnaces (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP01890160A 2000-06-29 2001-05-25 Four du type tour pour le traitement thermique de bandes métalliques Expired - Lifetime EP1167554B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0111300A AT408452B (de) 2000-06-29 2000-06-29 Turmofen zur wärmebehandlung von metallbändern
AT11132000 2000-06-29

Publications (3)

Publication Number Publication Date
EP1167554A2 true EP1167554A2 (fr) 2002-01-02
EP1167554A3 EP1167554A3 (fr) 2004-01-02
EP1167554B1 EP1167554B1 (fr) 2008-03-12

Family

ID=3685686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01890160A Expired - Lifetime EP1167554B1 (fr) 2000-06-29 2001-05-25 Four du type tour pour le traitement thermique de bandes métalliques

Country Status (14)

Country Link
US (1) US6425756B2 (fr)
EP (1) EP1167554B1 (fr)
JP (1) JP4856326B2 (fr)
KR (1) KR100791664B1 (fr)
AT (2) AT408452B (fr)
BR (1) BR0102591B1 (fr)
CA (1) CA2349693C (fr)
CZ (1) CZ300367B6 (fr)
DE (1) DE50113716D1 (fr)
ES (1) ES2303523T3 (fr)
RU (1) RU2249631C2 (fr)
TW (1) TWI232886B (fr)
UA (1) UA74329C2 (fr)
ZA (1) ZA200104662B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT507670B1 (de) 2009-07-03 2010-07-15 Ebner Ind Ofenbau Turmofen zur wärmebehandlung eines metallbands
DE102016222644A1 (de) * 2016-03-14 2017-09-28 Sms Group Gmbh Verfahren zum Walzen und/oder zur Wärmebehandlung eines metallischen Produkts

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04210431A (ja) * 1990-11-30 1992-07-31 San Furness Kk 竪型焼鈍炉の加熱炉
EP0675208A1 (fr) * 1994-03-31 1995-10-04 Chugai Ro Co., Ltd. Four vertical pour recuit blanc pour le traitement thermique en continu de bandes métalliques
WO1997039154A1 (fr) * 1996-04-12 1997-10-23 Thermtec B.V. Four de cuisson vertical pour dispositif de traitement de bande
EP0897017A1 (fr) * 1997-06-10 1999-02-17 Peter Helmut Dipl.-Ing. Ebner Four vertical de traitement thermique de bandes métalliques

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1485118A (en) * 1921-01-28 1924-02-26 Norton Co Muffle tunnel kiln
US2218354A (en) * 1939-03-13 1940-10-15 Wean Engineering Co Inc Method and apparatus for annealing strip
US2823292A (en) * 1956-07-31 1958-02-11 Heberlein Patent Corp Device for the continuous heat treatment of textile yarns
US3721520A (en) * 1971-09-02 1973-03-20 Selas Corp Of America Galvanizing wire
SE7707127L (sv) * 1977-06-20 1978-12-21 Bulten Kanthal Ab Anordning for glodgning av trad-, band- och stangformigt gods
US4398474A (en) * 1979-02-09 1983-08-16 Pyreflex Corporation Insulating structure for high temperature devices
JPS6317381A (ja) * 1986-07-09 1988-01-25 東邦レーヨン株式会社 炭素化炉
JP3275919B2 (ja) * 1990-12-26 2002-04-22 大同特殊鋼株式会社 竪形炉
JP3093864B2 (ja) * 1992-04-20 2000-10-03 日新製鋼株式会社 マッフルを備える竪型熱処理炉

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04210431A (ja) * 1990-11-30 1992-07-31 San Furness Kk 竪型焼鈍炉の加熱炉
EP0675208A1 (fr) * 1994-03-31 1995-10-04 Chugai Ro Co., Ltd. Four vertical pour recuit blanc pour le traitement thermique en continu de bandes métalliques
WO1997039154A1 (fr) * 1996-04-12 1997-10-23 Thermtec B.V. Four de cuisson vertical pour dispositif de traitement de bande
EP0897017A1 (fr) * 1997-06-10 1999-02-17 Peter Helmut Dipl.-Ing. Ebner Four vertical de traitement thermique de bandes métalliques

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HONERVOGT H W: "EINE INDIREKT BEHEIZTE GLUEHANLAGE FUER DAS GLUEHEN VON NICHTROSTENDEN UND SAEUREBESTAENDIGEN KALTBAENDERN UNTER SCHUTZGAS.AN INDIRECT HEATED ANNEALING FURNACE FOR STAINLESS AND ACID-RESISTANT COLD STRIP WITH PROTECTIVE GAS ATMOSPHERE" STAHL UND EISEN, VERLAG STAHLEISEN GMBH. DUSSELDORF, DE, Bd. 93, Nr. 24, 22. November 1973 (1973-11-22), Seiten 1152-1157, XP000673714 ISSN: 0340-4803 *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 552 (C-1006), 20. November 1992 (1992-11-20) & JP 04 210431 A (SAN FUAANESU KK), 31. Juli 1992 (1992-07-31) *

Also Published As

Publication number Publication date
ES2303523T3 (es) 2008-08-16
US20020000180A1 (en) 2002-01-03
EP1167554B1 (fr) 2008-03-12
CZ300367B6 (cs) 2009-05-06
CA2349693A1 (fr) 2001-12-29
UA74329C2 (uk) 2005-12-15
BR0102591A (pt) 2002-02-19
RU2249631C2 (ru) 2005-04-10
CA2349693C (fr) 2009-12-08
DE50113716D1 (de) 2008-04-24
ATA11132000A (de) 2001-04-15
AT408452B (de) 2001-12-27
BR0102591B1 (pt) 2010-08-10
EP1167554A3 (fr) 2004-01-02
ATE389037T1 (de) 2008-03-15
US6425756B2 (en) 2002-07-30
CZ20012427A3 (cs) 2002-03-13
TWI232886B (en) 2005-05-21
KR100791664B1 (ko) 2008-01-03
KR20020002256A (ko) 2002-01-09
ZA200104662B (en) 2001-12-14
JP4856326B2 (ja) 2012-01-18
JP2002054879A (ja) 2002-02-20

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