EP0085733B1 - Durchzieh-Glühofen vertikaler Bauart und Betriebsverfahren - Google Patents

Durchzieh-Glühofen vertikaler Bauart und Betriebsverfahren Download PDF

Info

Publication number
EP0085733B1
EP0085733B1 EP19820100981 EP82100981A EP0085733B1 EP 0085733 B1 EP0085733 B1 EP 0085733B1 EP 19820100981 EP19820100981 EP 19820100981 EP 82100981 A EP82100981 A EP 82100981A EP 0085733 B1 EP0085733 B1 EP 0085733B1
Authority
EP
European Patent Office
Prior art keywords
furnace
strip
cover
heating
chamber
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
EP19820100981
Other languages
English (en)
French (fr)
Other versions
EP0085733A1 (de
Inventor
Ryoji Terakado
Masaru Iwasa
Ituo Takahashi
Norio Anzawa
Gen Yoshida
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to EP19820100981 priority Critical patent/EP0085733B1/de
Priority to DE8282100981T priority patent/DE3271225D1/de
Publication of EP0085733A1 publication Critical patent/EP0085733A1/de
Application granted granted Critical
Publication of EP0085733B1 publication Critical patent/EP0085733B1/de
Expired legal-status Critical Current

Links

Images

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
    • C21D9/52—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

Definitions

  • An object of this invention is to provide a vertical continuous annealing furnace that does not permit any excessive emission of heat or development of spalling on the furnace walls even when the furnace is opened when the strip manufacturing line stops and that permits quick charging and discharging of the strips.
  • An open-close sealing device 31 is provided on the top surface of the first furnace cover 21, adjacent to each of the long narrow openings 25 and 26.
  • This open-close sealing device 31 comprises a sealing mechanism 32 that closes the openings 25 and 26 and a pneumatic cylinder 33 that moves back and forth the sealing mechanism 32 perpendicular to the surface of the strip 1.
  • the sealing mechanism 32 comprises a pair of sealing surfaces of ceramic fiber, which hold the strip 1 therebetween, and air seal. By this means, the sealing mechanism 32 forms a slit-like charging port 34 and discharging port 35 which close the long narrow openings 25 and 26, respectively.
  • Each of the upper and lower surfaces of the second furnace cover 41 has a water-seal groove 48 and a seal edge 49.
  • a matching seal edge 50 and water-seal groove 51 are provided in such positions of the furnace proper 11 that correspond to the water-seal groove 48 and seal edge 49, respectively.
  • the heating burners 55 With the heating burners 55 arranged as described above, flames circulatingly flow about the strip 1, like a whirlwind spinning around in a sheath-like squashed cylindrical form.
  • the burners 55 may also be arranged in such a manner that the direction of the whirlwind is reversed in the heating and soaking zones.
  • Deflector pinch rolls 71 and 72 are provided where the charging and discharging ports open, respectively, in the top of the furnace proper.
  • a laterally movable upper bogie 75 is disposed between these deflector pinch rolls 71 and 72 and the first furnace cover 21.
  • Paired guide rollers 76 and 77 are mounted on the charging and discharging sides of the upper bogie 75.
  • the strip 1 is held and guided between the paired guide rollers 76 and 77 whose openings are adjustable.
  • the guide rollers 76 may be fixed to a stand because they need not move with the bogie.
  • the main object of the guide rollers 76 and 77 is to center the strip 1 so that it passes, without a hitch, through the slits 25 and 26 in the furnace cover 21. Their openings may be greater than the strip thickness to leave a clearance between the strip and rollers since they do not have to be in constant contact with the strip during operation.
  • the lower end 7 of the free loop 6 is ascertained by means of the light emitters 65 and 66 and light receivers 67 and 68.
  • the strip 1 Carried horizontally from the left in Fig. 1, the strip 1 is perpendicularly turned by the charging side deflector pinch rolls 71, and fed into the furnace below at an appropriate speed.
  • the charging side guide rollers 76 hold and guide the strip 1 to descend through the slit-like charging port 35 that is kept airtight by means of the open-close ceramic fiber and air seal.
  • the strip 1 goes down through the long narrow opening 25 in the first furnace cover 21 into the airtight pre- chamber 15, then further down into the heating chamber 16 through the long narrow opening 45 in the second furnace cover 41 that constitutes the ceiling of the heating chamber 16.
  • the lever of the lower end 7 of the strip loop is controlled so that the light emitted from the light emitter 66 is always received by the light receiver 68. This means that there exists no intercepting object in the path of light at this level. In other words, the lower end 7 of the strip loop 6 stays above the light emitter 66 and light receiver 68.
  • the lower end of the strip loop can be controlled with a desired precision.
  • the strip 1 partially loses its rigidity and grows soft in the heating chamber 16, thus drawing a free loop 6 similar to a substantially perfect catenary curve, under the influence of gravity. If the heating burners were disposed vertically and parallel to the walls of the heating chamber, some of the burners would fail to bring flames close enough to the looped strip 1 to give adequate heating, whereas other burners would damage the strip 1 with directly impinging flames.
  • the deflector pinch rolls 71 or 72 are actuated to raise the lower end 4 of the strip loop to a point indicated by a broken line in Fig. 1. Then, the bogie 43 carrying the second furnace cover 41 is returned onto the path line to bring the partition 47 out of the receding chamber 17 back to its original position. By doing this operation quickly, the lower end 7 of the strip loop 6 can be raised from the heating chamber 16 to the pre-chamber 15 in an extremely short time.
  • the clearances between the first furnace cover 21, front and rear walls 18 and second furnace cover 41 are sealed at three levels by means of the water-seal grooves 28, 48 and 51, etc.
  • the atmosphere of the heating chamber 16 does not flow into the pre-chamber 15.
  • the strip loop in the pre-chamber 15 is protected from the oxidization and heating by the oxidizing atmosphere and radiant heat in the heating chamber 16. All this contributes to the principal advantage of this invention that the strip 1 remains undamaged even when the annealing lines is stopped or shut down.
  • the furnace proper 11 is divided by the partition 47 into the heating zone 16a and the soaking zone 16b.
  • the pre-chamber 15 radiative heat transfer takes place between the low-temperature strip just charged and the high-temperature strip that is about to be discharged, 'cooling the strip on the discharging side to unnecessarily low temperatures.
  • the first furnace cover is provided with a vertically hanging partition to separate the pre-chamber into two zones to minimize the heat exchange between the incoming and outgoing strip.
  • a pre-chamber partition 82 hangs down from substantially the center of the first furnace cover 81 mounted on the top of the pre-chamber 15.
  • the strip is raised out of the heating and soaking chambers to a position indicated by a broken line in the figure.
  • the pre- chamber partition 82 has the greatest length allowable within the range that it does not interfere with the strip in the aforementioned raised position.
  • this embodiment is particularly useful in applications in which strip of stainless or other special steel is annealed at a temperature of 800°C to 1,000°C and then quenched from a temperature of 750°C to 800°C.
  • the cooling zone is usually provided where the strip coming out of the furnace travels horizontally. Placing the cooling zone above the furnace could create various troubles such as the leakage of cooling water. If the aforesaid radiative heat transfer takes place between the incoming and outgoing strip in the pre-chamber 15 shown in Fig. 7, the temperature of the outgoing strip becomes too low to maintain the temperature at which quenching is scheduled to start. Dividing the pre-chamber 15 by the pre-chamber partition 82 prevents such undesirable temperature drop and, thereby, assures the attainment of the desired quality.
  • Dividing the pre-chamber 15 also permits utilizing the pre-chamber 15 as part of the soaking zone, which, in turn, enables reducing the height of the entire furnace.
  • the furnace cover or covers must be changed from time to time, depending upon the kind of application or whether the intended annealing operation needs, or need not, the partition. Or otherwise, even such annealing as essentially can dispense with the partition is forced to be implemented with the partition in position, with a resulting worsening in unit heat consumption.
  • Another embodiment described below comprises a furnace cover provided with a long narrow opening that can be moved in and out of the path line and a guide device to bring a hanging partition to below the furnace cover.
  • the partition adapted to be reciprocated by the guide device, is brought to the center of the path line when the intended annealing operation requires it, and taken outside the path line when it is unnecessary.
  • the second furnace cover 85 has a horizontal chamber 86 at the center thereof and a slit-like opening 87 that connects the chamber 86 to the heating chamber 16.
  • the top 89 of the partition 88 which divides the heating chamber 16 into the heating zone 16a and soaking zone 16b, is admitted in the chamber 86 through the opening 87.
  • the partition 88 is hung from the projections 91 in the furnace cover 85 in a laterally movable manner.
  • a hydraulic cylinder 92 fastened on the furnace cover 85.
  • the partition 88 moves back and forth, receding, as required, into the receding chamber 17 provided on one side of the furnace proper 11.
  • the partition 88 is taken out of the chamber 86 in the furnace cover 85 and brought to the center of the path line as shown in Fig. 9, by means of the guide rollers 90 and drive cylinder 92. When no such need exists, the partition 88 is moved to the right in Fig. 9 until it retreats into the receding chamber 17.
  • Fig. 10 shows an embodiment with two furnace covers, and still greater advantage can be derived if more furnace covers are provided.
  • the furnace wall 115 is lined with ceramic fiber 116, with a number of small square-pillar-like refractory bricks 117 implanted. These refractory bricks 117 are spalling-proof. In Fig. 11 the second furnace cover is omitted for reasons of simplification only.
  • each furnace wall 115 should have two vertical rows of bricks, each row comprising ten-odd bricks. Even if the bricks are arranged in a horizontally or vertically close- packed row, one next to another, the same effect can be achieved as when they are separated from each other.
  • a radiation pyrometer 122 to measure the surface temperature of the strip 1 is provided on the exit side of a vertical continuous annealing furnace 121.
  • the second furnace cover is omitted only for reasons of simplification.
  • a thermometer 123 to measure the temperature of the outside atmosphere is provided above the furnace 121.
  • a line-speed detector 124 follows the exit-side deflector pinch rolls 72.
  • the arithmetic control unit 133 controls the cooling device 125. More specifically, the arithmetic control unit 133 determines the number and section of the cooling water sprays 126 ttlaLmust be put into operation as well as the quantities of water to be sprayed in each section and the whole cooling zone.
  • the on-off valve 127 and solenoid valve 128 connected to each cooling water spray 126 are actuated.
  • the total flow-rate detector 130 grasps the flow rate that changes from moment to moment. If there arises any discrepancy between the flow rate thus measured and the result of calculation made by the control unit 133, correction signal is sent through the total flow-rate controller 135 to the total flow-rate regulating valve 131 to control the actual flow rate.
  • Fig. 16 is a flow chart showing the process of arithmetic calculation performed by the arithmetic control unit 133.
  • the control unit 133 determines, from equation Ti, the temperature of strip at the entrance of each section of the cooling zone, and then the cooling starting section i that satisfies the temperature range preset as the starting point of cooling.
  • the number of cooling sections put in operation n is determined in order to satisfy the preset range of necessary cooling rate W as well as to keep the strip temperature at the exit end of the cooling zone To below the level of the heat resistivity of the subsequent equipment. Then, the heat transfer rate a between the strip and cooling water and the total quantity of spray water Q are determined.
  • this problem can be solved by passing the strip through more than one vertical continuous annealing furnaces arranged in series. More effective annealing can be attained by making the mid-furnace partition shorter in the downstream furnace than in the upstream furnace.
  • the furnaces 141 and 145 may be employed solely for heating and the furnace 149 solely for soaking. This permits greatly increasing the speed of strip travel and, therefore, the rate of production.
  • the soaking zone 16b of the furnaces 141 and 145 serves as the second heating zone
  • the heating zone 16a and the soaking zone 16b of the furnace 149 serve as the first and second soaking zones, respectively.
  • the partition is essential to keep the high-temperature strip away from the low-temperature strip.
  • the incoming strip differs little in temperature from the outgoing strip as a result of heating in the preceding furnace. So the partition, which is indispensable in the foremost furnace, need not be provided in the subsequent furnaces.
  • the strip 1 guided by the guide rollers 71, enters the furnace through the long narrow opening 156 in the furnace cover 154.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Claims (18)

1. Vertikaler Durchlaufglühofen zum Erwärmen und Glühen eines Bandes (1) aus Stahl, das durch schlitzartige Zufuhr- und Auslaßöffnungen in der Ofenspitze zugeführt und abgeführt wird und innerhalb des Ofens eine freie Schleife ausbildet, mit einem Ofenkörper (11) und einem sich in der Ofenspitze nach oben öffnenden Ofenmund (12; 101), gekennzeichnet durch eine seitlich verschiebbare erste Ofenabdeckung (21, 81; 103) zum Öffnen und Schließen des Ofenmunds (12; 101) in der Spitze des Ofenkörpers (11) und eine im Abstand unterhalb der ersten Ofenabdeckung (12, 81; 103) angeordnete zweite Ofenabdeckung (41; 85; 108), die den Ofenkörper (11) in eine obere Vorkammer (15) und eine untere Heizkammer (16) teilt, seitlich verschiebbar ist und eine vertikal hängende Zwischenwand (47; 88; 111) zum Teilen der Heizkammer (16) in eine Heizzone (16a) und eine Durchglühzone (16b) aufweist.
2. Ofen nach Anspruch 1, dadurch gekennzeichnet,
a) daß die erste Ofenabdeckung (21; 81; 103) horizontal angeordnet ist und zwei lange, schmale Öffnungen (25, 26) aufweist, die sich seitlich von einer Seite der Abdeckung zur anderen erstrecken und in Längsrichtung beabstandet sind, so daß die absteigenden und aufsteigenden Teile des Bandes (1) hindurchgeführt werden können,
b) daß die zweite Ofenabdeckung (41; 85; 108) horizontal angeordnet ist und zwei lange, schmale Öffnungen (45, 46) aufweist, die sich seitlich von einer Seite der Abdeckung zur anderen erstrecken und in Längsrichtung beabstandet sind, so daß die absteigenden und aufsteigenden Teile des Bandes (1) hindurchgeführt werden können, und
c) daß die Zwischenwand (47; 88; 111) sich von der Unterseite der zweiten Ofenabdeckung (41; 85; 108) bis in die Nähe des Ofenbodens erstreckt.
3. Ofen nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mehrere Heizbrenner (55) auf den Seitenwänden (13; 115) der Heizkammer (16) vorgesehen sind, die auf die Kanten der darin befindliche,p Bandes (1) gerichtet sind, wobei die Heizbrenner (55) im wesentlichen in gleichem Abstand von beiden Oberflächen des Bandes (1) angeordnet und vertikal voneinander beabstandet sind und die Brenner (55) auf einer Seite des Bandes (1) bezüglich denjenigen auf der anderen Seite geneigt gehalten werden.
4. Ofen nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß mindestens eine Verbrennungsgasauslaßöffnung (57) in der Nähe der Spitze jeder Seitenwand (13; 115) der Heiz-und Durchglühzonen (16a, b) in der Heizkammer (16) vorgesehen ist.
5. Ofen nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die erste Ofenabdeckung (81) eine vertikal hängende Zwischenwand (82) zum Teilen der Vorkammer (15) in eine obere und eine untere Kammer aufweist.
6. Ofen nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Zwischenwand (88) der zweiten Ofenabdeckung (85) seitlich verschiebbar an der zweiten Ofenabdeckung (85) befestigt ist.
7. Ofen nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß im Ofenkörper (11) mehrere zweite Ofenabdeckungen (108) vorgesehen sind, so daß die Heizkammer (16) in mehrere horizontale Abschnitte unterteilt ist.
8. Ofen nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Wände (115) des Ofenkörpers (11) mit Keramikfasern (116) ausgekleidet sind und daß darin in zufälliger Weise vorspringende, gegen Ausbrechen beständige Feuerfeststeine (117, 118, 119) eingelassen sind.
9. Ofen nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß auf der ersten Ofenabdeckung (21) eine Dichteinrichtung (31,32) angeordnet ist, die eine umittelbar oberhalb der langen schmalen Öffnung (25, 26) zum Durchlaß des Bandes (1) angeordnete verschließbare, schlitzartige Öffnung (34, 35) aufweist.
10. Ofen nach einem der Ansprüche 1 bis 9, gekennzeichnet durch
a) einen in der Nähe des Austrittsendes des Ofens (121) angeordneten Detektor (123) zum Ermitteln der Temperatur der Atmosphäre außerhalb des Ofens (121);
b) einen an der Austrittsseite des Ofens (121) angeordneten Detektor (122) zum Ermitteln der Temperatur des Bandes (1);
c) einen an der Austrittsseite des Ofens (121) angeordneten Detektor (124) zum Ermitteln der Vorschubgeschwindigkeit des Bandes (1);
d) eine Sprüheinrichtung (125) zum Sprühen von Kühlwasser, die mehrere in Längsrichtung des Bandes (1) angeordnete Kühlabschnitte aufweist; und
e) eine Einrichtung (133) zum Wählen eines zum Abkühlen des Bandes (1) auf die gewünschte Temperatur in Betrieb zu setzenden Kühlabschnittes und zum Steuern der aufgesprühten Wassermenge in Abhängigkeit von den von den einzelnen Detektoren (122-124, 130) gelieferten Signalen.
11. Ofenanordnung, gekennzeichnet durch mehrere, in Reihe angeordnete vertikale Durchlaufglühöfen (141, 145, 149; 153) nach einem der Ansprüche 1 bis 10.
12. Ofenanordnung nach Anspruch 11, dadurch gekennzeichnet, daß die Zwischenwand (144,148, 152) in jedem in Durchlaufrichtung des Bandes unterhalb angeordneten Ofen (141, 145, 149) kürzer ist als die Zwischenwand (144, 148, 152) im vorhergehenden Ofen (141, 145, 149).
13. Ofenanordnung nach einem der Ansprüche 11 oder 12, dadurch gekennzeichnet, daß zum Umschließen des Bandes (1) eine Halteabdeckung (157) vorgesehen ist, die den Auslaß eines Ofens (153) mit dem Einlaß des benachbarten, in Durchlaufrichtung des Bandes unterhalb angeordneten Ofens (153) verbindet und seitlich verschiebbar ist, um den Auslaß und Einlaß der miteinander verbundenen Öfen (153) zu öffnen.
14. Verfahren zum Betrieb eines vertikalen Durchlaufglühofens, insbesondere nach einem der Ansprüche 1 bis 10, mit einer zum Öffnen und Schließen des Ofenmundes in der Spitze des Ofenkörpers seitlich verschiebbaren ersten Ofenabdeckung und einer im Abstand unterhalb der ersten Ofenabdeckung angeordneten zweiten Ofenabdeckung zum Teilen des Ofens in eine obere Vorkammer und eine untere Heizkammer, wobei die zweite Ofenabdeckung seitlich verschiebbar ist und eine vertikal hängende Zwischenwand zum Teilen der Heizkammer in eine obere und eine untere Zone aufweist und wobei ein durch schlitzartige Zufuhr- und Auslaßöffnungen in der Ofenspitze zugeführtes und abeführtes Stahlband erwärmt und geglüht wird und innerhalb des Ofens eine freie Schliefe ausbildet, mit den folgenden Verfahrensschritten:
a) Absenken des Bandes (1), nachdem die erste Ofenabdeckung (21; 81; 103) aus der Wegstreckte des Bandes (1) herausbewegt ist, wobei die Heizkammer (16) durch die zweite Ofenabdeckung (41; 85; 108) geschlossen ist;
b) Sicherstellen, daß das untere Ende (5) der Bandschleife (4) innerhalb der Vorkammer (15) angeordnet ist;
c) Zurückbewegen der ersten Ofenabdeckung (21; 81; 103) auf die Wegstrecke des Bandes; und
d) Einführen des Bandes (1) in die Heizkammer (16).
15. Verfahren nach Anspruch 14, dadurch gekennzeichnet, daß das Herausführen des Bandes (1) aus dem Ofen durch Umkehren der Verfahrensschritte gemäß Anspruch 14 durchgeführt wird.
16. Verfahren nach Anspruch 14 und 15, dadurch gekennzeichnet, daß das untere Ende (5) der Bandschleife (4) durch Detektionseinrichtungen (61-64) auf den Seitenwänden (18) der Vorkammer (15) ermittelt wird, die jeweils mindestens einen Lichtsender (61, 62) und einen Lichtempfänger (63, 64) aufweisen.
17. Verfahren nach einem der Ansprüche 14 bis 16, dadurch gekennzeichnet, daß die Durchlaufgeschwindigkeit des Bandes (1) automatisch in Abhängigkeit von Signalen von mehreren vertikal beabstandeten Detektionseinrichtungen in der Nähe des unteren Endes (7) der Bandschleife (6) in der Heizkammer (16) geregelt wird, wobei jede Detektionseinrichtung einen Lichtsender (65, 66) und einen Lichtempfänger (67, 68) aufweist, so daß das untere Ende (7) der Bandschleife (6) zwischen dem oberen Satz von Lichtsender und -empfänger (65, 67) und dem unteren Satz von Lichtsender und -empfänger (66, 68) gehalten wird.
18. Verfahren nach einem der Ansprüche 14 bis 17, dadurch gekennzeichnet, daß die Strömung des Verbrennungsgases gemäß dem mittels einer Drossel (58) ausgeführten Heizzyklus gesteuert wird, die am Austrittsende mindestens einer Verbrennungsgasaustrittsöffnung (57; 57a, b) vorgesehen ist, die auf jeder Seite des Bandes (1) in den durch die von der Ofenabdeckung (41) hängende Zwischenwand (47) getrennten Heiz- und Durchglühzonen (16a, b) vorgesehen sind.
EP19820100981 1982-02-10 1982-02-10 Durchzieh-Glühofen vertikaler Bauart und Betriebsverfahren Expired EP0085733B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19820100981 EP0085733B1 (de) 1982-02-10 1982-02-10 Durchzieh-Glühofen vertikaler Bauart und Betriebsverfahren
DE8282100981T DE3271225D1 (en) 1982-02-10 1982-02-10 Vertical continuous annealing furnace and its operating method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19820100981 EP0085733B1 (de) 1982-02-10 1982-02-10 Durchzieh-Glühofen vertikaler Bauart und Betriebsverfahren

Publications (2)

Publication Number Publication Date
EP0085733A1 EP0085733A1 (de) 1983-08-17
EP0085733B1 true EP0085733B1 (de) 1986-05-21

Family

ID=8188868

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820100981 Expired EP0085733B1 (de) 1982-02-10 1982-02-10 Durchzieh-Glühofen vertikaler Bauart und Betriebsverfahren

Country Status (2)

Country Link
EP (1) EP0085733B1 (de)
DE (1) DE3271225D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3430205C1 (de) * 1984-08-17 1986-03-27 Otto Junker Gmbh, 5107 Simmerath Schleuse fuer Gluehofenanlagen
NL1013752C2 (nl) * 1999-11-23 2001-05-28 Thermtec B V Bandbehandelingsinstallatie.
CN112063809A (zh) * 2020-09-25 2020-12-11 山东创新精密科技有限公司 一种铝型材立式淬火炉

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1890065A (en) * 1927-06-26 1932-12-06 Swindell Dressler Corp Method and apparatus for heat treating sheet metal
US1811522A (en) * 1930-11-17 1931-06-23 Strip Tin Plate Company Furnace
US2009856A (en) * 1934-03-21 1935-07-30 Gen Electric Annealing furnace
DE705764C (de) * 1936-11-26 1941-05-09 Brown Boveri & Cie Akt Ges Durchziehschachtofen mit Waermerueckgewinnung
DE670248C (de) * 1936-12-12 1939-01-16 Brown Boveri & Cie Akt Ges Einrichtung zur Regelung des Banddurchhanges bei zur Waermebehandlung von Baendern dienenden OEfen
US2499191A (en) * 1948-09-22 1950-02-28 Gen Electric Vertical loop furnace
US3152794A (en) * 1962-09-14 1964-10-13 Ind Ovens Inc Means for continuously treating strip
US3496033A (en) * 1967-06-05 1970-02-17 United States Steel Corp Method and apparatus for controlling annealing furnaces

Also Published As

Publication number Publication date
DE3271225D1 (en) 1986-06-26
EP0085733A1 (de) 1983-08-17

Similar Documents

Publication Publication Date Title
US3048383A (en) Furnace or like system for gas-supporting and treating flat work
US4153236A (en) Preheating furnace
JPS6410579B2 (de)
US4395021A (en) Vertical continuous annealing furnace and its operating method
US6129258A (en) Muffle convection brazing and annealing system and method
EP0085733B1 (de) Durchzieh-Glühofen vertikaler Bauart und Betriebsverfahren
US4468262A (en) Method of cooling hot-rolled wire rods
US4449923A (en) Continuous heat-treating furnace
JPS6318649B2 (de)
US4397449A (en) Apparatus for cooling hot-rolled wire rods
US3476368A (en) High temperature kiln
US3459412A (en) Methods of continuously firing ceramic charge material in tunnel kilns,and tunnel kilns for carrying out these methods
US3623714A (en) Method of and apparatus for operating a furnace
EP2580360B1 (de) Ausglühinstallation mit m-förmigem streifenbehandlungstunnel
KR880000469B1 (ko) 수직형 연속 소둔로 및 그 조업방법
JPH03257119A (ja) ローラハース式真空炉
US2056904A (en) Continuous furnace
RU2111933C1 (ru) Способ обжига керамических изделий и устройство для его осуществления
US3807943A (en) Muffle furnace for treatment of articles on conveyor
CA1077265A (en) Hover furnaces
US2127742A (en) Tunnel kiln
US3484086A (en) Ingot heating furnace
US3379423A (en) Hearth firing apparatus
JP2001138034A (ja) 蓄熱式バーナを用いた取鍋の急速加熱方法
JPH07286725A (ja) 焼成炉の炉圧制御装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19831109

ITF It: translation for a ep patent filed

Owner name: DR. ING. A. RACHELI & C.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3271225

Country of ref document: DE

Date of ref document: 19860626

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19890323

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19901101

ITTA It: last paid annual fee
EAL Se: european patent in force in sweden

Ref document number: 82100981.8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19950131

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19950210

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19950215

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19960210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19960211

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19960210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19961031

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST