EP1443120B2 - Device for continuous heat treatment of metal strips - Google Patents

Device for continuous heat treatment of metal strips Download PDF

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Publication number
EP1443120B2
EP1443120B2 EP03029982A EP03029982A EP1443120B2 EP 1443120 B2 EP1443120 B2 EP 1443120B2 EP 03029982 A EP03029982 A EP 03029982A EP 03029982 A EP03029982 A EP 03029982A EP 1443120 B2 EP1443120 B2 EP 1443120B2
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web
run
nozzle
confining fluid
heat treatment
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EP03029982A
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German (de)
French (fr)
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EP1443120A1 (en
EP1443120B1 (en
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Carl Prof.Dr.-Ing. Kramer
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    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • 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
    • C21D9/63—Continuous furnaces for strip or wire the strip being supported by a cushion of gas
    • 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
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/04—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
    • F27B9/045—Furnaces with controlled atmosphere
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
    • F27B9/2476—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor the conveyor being constituted by air cushion
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/40—Arrangements of controlling or monitoring devices
    • 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
    • F27D19/00—Arrangements of controlling devices
    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • 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
    • C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
    • 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
    • C21D9/565—Sealing 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
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0059—Regulation involving the control of the conveyor movement, e.g. speed or sequences

Definitions

  • the invention relates to a device for heat treatment of contactless guided metallic bands in the descending passage, in particular for operation under inert gas of low density, such as a nitrogen / hydrogen mixture with a high hydrogen content.
  • Continuous systems play in the heat treatment of strips of both iron and non-ferrous metal alloys, such as. As copper alloys, a major role.
  • the continuous heat treatment is usually carried out under protective gas. This shielding gas can for the most part consist of nitrogen.
  • inert gas with a high hydrogen content or even pure hydrogen.
  • JP-A-02 061 011 please refer Patent Abstracts of Japan, vol. 014, no. 236 (C-0720 ) shows a tower furnace plant, in which two successive U-shapes are traversed, namely a heating part with heating elements in the descending branch, further heating elements in the ascending branch and a cooling zone again in the descending region. There are two areas of convex curvature, viewed from above, but no barrier fluid. In the two U-shaped areas, the band is guided by gas jets, but no position detector is provided.
  • JP-A-11 236 624 also shows a tower furnace system with vertical passage of the belts in a gas atmosphere with a housing and a roller bounded heat treatment part of a heating part and a cooling part. Furthermore, nozzle systems for heat treatment of the gas by means of forced convection and to stabilize the tape layer by blowing the tape provided: at the lower end of the descending tape run a barrier fluid is provided, where the tape - viewed from above - concave, namely is guided around a roll and then goes up.
  • a device for heat treatment of non-contact guided metallic bands in the descending passage in a gas atmosphere finally goes out of the JP-A-58 193 351 , please refer Patent Abstracts of Japan, vol. 008 no. 030 (6-209 ), and comprises a housing, a roller-confined heat-treatment member comprising a heating member and a cooling member, forced convection heat-treating nozzle systems, and stabilizing the band layer by blowing the band and a barrier fluid bath at the lower end of the rising band where the band - viewed from above - is concavely curved; from the bath, the band rises to the rear, the heat treatment part delimiting role.
  • the object of the invention is to provide a device which combines the advantages of the tape guide by means of stabilizing floating nozzles with the advantages of tower furnace systems and systems with leadership of the tape to a rope line without having to accept the disadvantages of the known system in purchasing.
  • FIG. 1 an embodiment of the device with vertical tape behind the roller 2 is shown.
  • the entire treatment part including the roller 2 is surrounded by a protective gas-tight housing 6.
  • the tape enters through the sealing device 7 shown schematically.
  • This device is, according to the prior art, for. B. designed as a roller seal and requires no further explanation.
  • the band 1 In the descending strip, the band 1 first passes through the heating part 4 and then the first portion of the cooling part 5. On both sides of the band 1 are the stabilizing Beblasungsdüsensysteme 8l, 8r for the heating part and 91 and 9r for the cooling part.
  • This course is in a fluid 12, z. B. water.
  • This fluid 12 usually a suitable liquid, at the same time delimits the interior of the housing 6 from the outside atmosphere and thus separates the protective gas from the ambient air.
  • both on the inner curve and on the outer curve nozzle systems 9i, 9a which act similar to the working in the gas atmosphere systems 8 and 9, but are designed and designed specifically for operation with the barrier fluid and the fluid, in particular Water, point to tape 1.
  • these fluid nozzles 9i, 9a stabilizing forces are exerted on the band which also guide thin bands 1, which would otherwise run, in the desired concave shape.
  • these nozzle systems also act in a position-stabilizing manner in the direction transverse to the strip, similar to a strip center control.
  • the position of the tape run is detected and controlled in the low point of the concave curvature by means of at least one sensor 10, so that the desired shape is maintained under all operating conditions.
  • this high-level detection of the band works advantageously on the echosounder principle but it is a radar principle with microwaves possible.
  • FIG. 2 Further details of a typical tape run of the device according to the invention is shown FIG. 2 ,
  • the sealing of the device against the outside atmosphere takes place at the belt inlet by a double roller seal 41.
  • the roller combination 40 serves to reduce the strip tension from the higher train before the roller combination 40 to the lower train in the heat treatment part.
  • a control roller 42 is arranged in the first deflection of the tape run. Before this control roller 42 there is a sensor for detecting the band position and behind this control roller 42, a further pinch roller smaller diameter, which ensures a concern of the belt 1 on the guide roller 42 even at low tape tension.
  • closure device 43 which consists of two closure members that are movable perpendicular to the band.
  • this closure device 43 is formed by the advantageously water-cooled and provided with heat insulation inlet neck 44 band inlet opening in the heating part 4, which is also at a considerable temperature of z. B. about 950 ° C, closed, so that no heat during tape stall from the heat treatment part 4 can escape upwards and possibly there to damage the pulley 42 and their coating leads.
  • a cooling device (not shown) can still be provided, which excludes inadmissibly high roller temperatures.
  • a cooling device can, for. B. by blowing the tape with inert gas low temperature work. It may also be advantageous to arrange the roller combination 40 to reduce the strip tension to the low value in the treatment part immediately before the entry of the strip into it, so that the roller 2 is unnecessary.
  • the heat treatment part 4 and the lower part of the first part 5 of the cooling part are in FIG. 2 indicated by the reference numeral 45
  • the band 1 is guided through a protective gas-tight channel, which dips into the liquid closure 12.
  • the running in the direction of the roller 3 belt is guided by squeezing rollers 11 and then still adhering to the belt fluid 12, usually water, with the convection dryer 13, which may be heated, dried.
  • FIG. 3 shows, by way of example, further details of the vertical tape embodiment.
  • three superimposed heating zones 4 and one mounted under these heating zones 4 cooling zone 5 are shown.
  • the flow guides of the three heating zones 4 and the cooling zone 5 located underneath have in the in FIG. 3 shown longitudinal section across the tape the shape of a U.
  • FIG. 3 point the legs of the U down. It is but also the reverse arrangement, ie upward-pointing U-legs. possible.
  • the stabilizing nozzle fields 23 are arranged on the outside of the band 1 facing the leg of the U.
  • radial fans 21 which are inserted by means of plugs which are filled with insulating material in the outer wall.
  • the flow housing 20 are connected via crown-like structure 22 with the support structure of the fan 21 and in turn with the support structure of the outer housing 6. The power is transmitted to the tips of the crown teeth.
  • the delimitation of the zones from each other is carried out in the heating part by means of trapezoidal sheet metal floors 26.
  • At the first bottom 26 is below this trapezoidal sheet still a layer of insulating material 27, so that between the first and the second zone, a temperature difference can be adjusted and maintained.
  • This embodiment of the intermediate floor 26 in conjunction with thermal insulation 27 is of course possible between all zones.
  • FIG. 4 In devices for operation at high temperatures, eg. B. above 800 ° C in the heating part, and protective gas with a high hydrogen content is in FIG. 4 shown wall construction particularly advantageous.
  • the outer skin consists of a gas-tight welded sheet steel housing 30.
  • layers 32 of thermal insulation material eg. B. by welding, attached.
  • These applied to the outer wall 30 layers 32 are made of fibers with a high SiO 2 content, which indeed have good mechanical properties, but tend to decompose at high temperatures above about 800 ° C and hydrogen atmosphere, since SiO 2 is reduced to SiO.
  • the belt 1 is subjected to impact blasting of the heating or cooling fluid, in particular a gas, e.g. pure hydrogen or a hydrogen / nitrogen mixture with high hydrogen content, blowing, whereby a planar force is exerted on the band, which increases like a spring with decreasing distance between Band 1 and nozzle field; this leads to a position-stabilizing effect on the strip, the size of this stabilizing force being dependent on the back pressure of the blowing fluid in the nozzle exit of the impact blasting.
  • a gas e.g. pure hydrogen or a hydrogen / nitrogen mixture with high hydrogen content
  • the distance between the arranged on both sides of the belt 1 nozzle fields in the heat treatment part is substantially constant in the two areas heating 4 and 5 cooling, which means that the distance change is a maximum of ⁇ 10%.
  • a suitable nozzle system for achieving the desired effect is in the EP 0 864 518 B1 described and has in the direction of tape successive nozzle surfaces with nozzle openings of round holes and / or slot dies, wherein the width of the nozzle surfaces - measured parallel to the strip running direction - over the width of the nozzle array - measured perpendicular to the strip running direction - changes.
  • the nozzle surfaces are at least partially bordered by slot nozzles at their periphery.
  • This stabilizing nozzle system can be designed and operated in such a way that the band 1 is stabilized transversely to the strip run by the nozzle system, this transverse stabilizing effect being particularly pronounced in the area of the strip run with concave curvature, viewed from above.
  • a barrier fluid for the area 12 is any suitable fluid in question, which is preferably carried out with a liquid.
  • a suitable liquid may be selected taking into account the chemical compatibility with the metallic strip material.

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

Abstract

Device for heat treating metallic strips (1) has a heat treatment section containing a heating region (4) and a first cooling region (5), and nozzle fields (8o, 8u, 9o, 9u) for producing impact beams onto the strips. The strips are guided through the heating region and the first cooling region without contacting any parts. The distance between the nozzle fields arranged on both sides of the strips is constant in both regions. The strips are tensioned in the regions by rollers (2, 3) under the action of a gravitational force. The progress of the strip observed from above has a concave curve.

Description

Die Erfindung betrifft eine Vorrichtung zur Wärmebehandlung berührungslos geführter metallischer Bänder im absteigenden Durchlauf, insbesondere zum Betrieb unter Schutzgas geringer Dichte, wie beispielsweise ein Stickstoff/Wasserstoff-Gemisch mit hohem Wasserstoff-Anteil.The invention relates to a device for heat treatment of contactless guided metallic bands in the descending passage, in particular for operation under inert gas of low density, such as a nitrogen / hydrogen mixture with a high hydrogen content.

Durchlaufanlagen spielen bei der Wärmebehandlung von Bändern sowohl aus Eisenals auch aus Nichteisenmetall-Legierungen, wie z. B. Kupferlegierungen, eine große Rolle. Bei Bändern, deren Oberfläche während der Wärmebehandlung oxidieren kann, wird die Durchlaufwärmebehandlung üblicherweise unter Schutzgas durchgeführt. Dieses Schutzgas kann zum größten Teil aus Stickstoff bestehen. Für einige Wärmebehandlungsvorgänge ist es aber sinnvoll, Schutzgas mit einem hohen Wasserstoffanteil oder sogar reinen Wasserstoff zu verwenden.Continuous systems play in the heat treatment of strips of both iron and non-ferrous metal alloys, such as. As copper alloys, a major role. For tapes whose surface can oxidize during the heat treatment, the continuous heat treatment is usually carried out under protective gas. This shielding gas can for the most part consist of nitrogen. For some heat treatment processes, it makes sense to use inert gas with a high hydrogen content or even pure hydrogen.

Die Verwendung von reinem Wasserstoff als Schutzgas bietet den Vorteil einer besseren Wärmeübertragung, so dass mit gleicher Anlagenlänge wie bei Stickstoff ein wesentlich höherer Durchsatz erzielt werden kann.The use of pure hydrogen as inert gas offers the advantage of better heat transfer, so that with the same plant length as in nitrogen, a significantly higher throughput can be achieved.

Da an die Qualität der Oberfläche von Bändern sowohl aus Eisenlegierungen als auch aus Nichteisenmetall-Legierungen in der Regel hohe Anforderungen gestellt werden, ist es der moderne Stand der Technik, diese Bänder berührungsfrei zu führen. Die berührungsfreie Führung wird dadurch erreicht, dass das Band in einem Turmofen vertikal hängt oder in einem Horizontalofen eine Seillinie annimmt, die sich unter Wirkung der Schwerkraft einstellt.Since the quality of the surface of strips made of both iron alloys and non-ferrous metal alloys usually high demands are made, it is the modern state of the art to guide these bands without contact. The non-contact guidance is achieved by hanging the belt vertically in a tower furnace or in a horizontal furnace adopting a rope line which sets under the action of gravity.

Nachteilig ist insbesondere bei der Seillinie, dass bei größeren Bandlängen im Wärmebehandlungsteil sowohl ein hoher Banddurchhang als auch eine hohe Bandspannung auftreten. Dadurch ist der Durchsatz derartiger Anlagen sehr begrenzt.A disadvantage, in particular in the rope line, that with larger strip lengths in the heat treatment part both a high belt sag and a high belt tension occur. As a result, the throughput of such systems is very limited.

Um diese Nachteile zu vermeiden, wurden Anlagen mit horizontaler Bandführung entwickelt, wobei das Band im Behandlungsteil mittels Schwebedüsen in der horizontalen Lage stabilisiert und getragen wird. Solche Anlagen setzen aber voraus, dass eine ausreichend hohe Tragkraft erzielt werden kann, was bei hohen Temperaturen, Schutzgas geringer Dichte, wie z. B. einem Stickstoff/Wasserstoff-Gemisch mit hohem Wasserstoffanteil, und schweren Bändern große Probleme bereitet. Daher ist man vielfach, wenn man sich für die vorteilhafte Verwendung eines Schutzgases mit hohem Wasserstoffanteil entschieden hat, dazu gezwungen, die vorerwähnten Turmofenanlagen oder Anlagen mit Bandführung nach einer Seillinie zu verwenden.In order to avoid these disadvantages, systems with horizontal tape guide were developed, wherein the band is stabilized and worn in the treatment part by means of floating nozzles in the horizontal position. However, such systems require that a sufficiently high load capacity can be achieved, which at high temperatures, protective gas of low density, such as. As a nitrogen / hydrogen mixture with a high hydrogen content, and heavy bands causes great problems. Therefore, many have decided to use the above-mentioned tower kiln plants or belt-guided lines after a rope line, if they have opted for the advantageous use of a high-hydrogen shielding gas.

JP-A-02 061 011 , siehe Patent Abstracts of Japan, vol. 014, No. 236 (C-0720 ) zeigt eine Turmofenanlage, bei der zwei aufeinanderfolgende U-Formen durchlaufen werden, nämlich ein Erwärmungsteil mit Heizstäben im absteigenden Zweig, weiteren Heizstäben im aufsteigenden Zweig und einer Kühlzone wieder im absteigenden Bereich. Es gibt zwei Bereiche mit - von oben betrachtet - konvexer Krümmung, jedoch kein Sperrfluid. In den beiden U-förmigen Bereichen wird das Band durch Gasstrahlen geführt, es ist jedoch kein Positionsdetektor vorgesehen. JP-A-02 061 011 , please refer Patent Abstracts of Japan, vol. 014, no. 236 (C-0720 ) shows a tower furnace plant, in which two successive U-shapes are traversed, namely a heating part with heating elements in the descending branch, further heating elements in the ascending branch and a cooling zone again in the descending region. There are two areas of convex curvature, viewed from above, but no barrier fluid. In the two U-shaped areas, the band is guided by gas jets, but no position detector is provided.

JP-A-11 236 624 zeigt ebenfalls eine Turmofenanlage mit vertikalem Durchlauf der Bänder in einer Gasatmosphäre mit einem Gehäuse und einem durch Rollen eingegrenzten Wärmebehandlungsteil aus einem Erwärmungsteil und einem Kühlteil. Weiterhin sind Düsensysteme zur Wärmebehandlung des Gases mittels erzwungener Konvektion und zur Stabilisierung der Bandlage durch Beblasen des Bandes vorgesehen: am unteren Ende des absteigenden Bandlaufes ist ein Sperrfluid vorgesehen, wo das Band - von oben betrachtet - konkav gekrümmt, nämlich um eine Rolle geführt ist und dann nach oben ansteigt. JP-A-11 236 624 also shows a tower furnace system with vertical passage of the belts in a gas atmosphere with a housing and a roller bounded heat treatment part of a heating part and a cooling part. Furthermore, nozzle systems for heat treatment of the gas by means of forced convection and to stabilize the tape layer by blowing the tape provided: at the lower end of the descending tape run a barrier fluid is provided, where the tape - viewed from above - concave, namely is guided around a roll and then goes up.

Eine Vorrichtung zur Wärmebehandlung berührungslos geführter metallischer Bänder im absteigenden Durchlauf in einer Gasatmosphäre geht schließlich aus der JP-A-58 193 351 , siehe Patent Abstracts of Japan, vol. 008 No. 030 (6-209 ), hervor und weist ein Gehäuse, einen durch Rollen eingegrenzten Wärmebehandlungsteil aus einem Erwärmungsteil und einem Kühlteil, Düsensysteme zur Wärmebehandlung des Gases mittels erzwungener Konvektion und zur Stabilisierung der Bandlage durch Beblasen des Bandes und ein Bad aus einem Sperrfluid am unteren Ende des ansteigenden Bandlaufs auf, wo das Band - von oben betrachtet -konkav gekrümmt ist; aus dem Bad steigt das Band zur hinteren, den Wärmebehandlungsteil eingrenzenden Rolle auf.A device for heat treatment of non-contact guided metallic bands in the descending passage in a gas atmosphere finally goes out of the JP-A-58 193 351 , please refer Patent Abstracts of Japan, vol. 008 no. 030 (6-209 ), and comprises a housing, a roller-confined heat-treatment member comprising a heating member and a cooling member, forced convection heat-treating nozzle systems, and stabilizing the band layer by blowing the band and a barrier fluid bath at the lower end of the rising band where the band - viewed from above - is concavely curved; from the bath, the band rises to the rear, the heat treatment part delimiting role.

Aufgabe der Erfindung ist es, eine Vorrichtung zu schaffen, welche die Vorteile der Bandführung mittels stabilisierenden Schwebedüsen mit den Vorteilen von Turmofenanlagen und Anlagen mit Führung des Bandes nach einer Seillinie vereint, ohne die Nachteile der bekannten Anlage in Kauf nehmen zu müssen.The object of the invention is to provide a device which combines the advantages of the tape guide by means of stabilizing floating nozzles with the advantages of tower furnace systems and systems with leadership of the tape to a rope line without having to accept the disadvantages of the known system in purchasing.

Dies wird durch die Kombination der im kennzeichnenden Teil des Hauptanspruchs aufgeführten Merkmale erreicht.This is achieved by the combination of the features listed in the characterizing part of the main claim.

Zweckmäßige Ausführungsformen werden durch die Unteransprüche definiert.Advantageous embodiments are defined by the subclaims.

Die Erfindung wird im Folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die beiliegenden, schematischen Zeichnungen näher erläutert.The invention will be explained in more detail below by means of embodiments with reference to the accompanying schematic drawings.

Es zeigen:Show it:

Figur 1FIG. 1
eine Ausführung der Vorrichtung mit vertikalem Bandlauf, an den sich der Bereich mit - von oben betrachtet - kon kavem Bandlauf anschließt,an embodiment of the device with vertical tape to which the area with - viewed from above - kon kavem tape,
Figur 2FIG. 2
eine schematische Darstellung der Vorrichtung mit vertikalem Bandlauf und weiterer Details zur Bandführung,a schematic representation of the device with vertical tape and further details on the tape guide,
Figur 3FIG. 3
einen Ausschnitt des Behandlungsteiles für eine Vorrichtung mit vertikaler Bandführung, in dem weitere Ausführungsdetails zu erkennen sind, unda section of the treatment part for a device with vertical tape guide, in the further execution details can be seen, and
Figur 4FIG. 4
das Schema einer vorteilhaften Ausführung der Außenwand.the scheme of an advantageous embodiment of the outer wall.

In Figur 1 ist eine Ausführung der Vorrichtung mit vertikalem Bandlauf hinter der Rolle 2 dargestellt. Bei dieser Vorrichtung ist der gesamte Behandlungsteil einschließlich der Rolle 2 von einem schutzgasdichten Gehäuse 6 umgeben. Durch dieses Gehäuse 6 tritt das Band durch die schematisch dargestellte Abdichteinrichtung 7 ein. Diese Einrichtung ist, dem Stand der Technik entsprechend, z. B. als Rollenabdichtung ausgeführt und bedarf keiner weiteren Erläuterung.In FIG. 1 an embodiment of the device with vertical tape behind the roller 2 is shown. In this device, the entire treatment part including the roller 2 is surrounded by a protective gas-tight housing 6. Through this housing 6, the tape enters through the sealing device 7 shown schematically. This device is, according to the prior art, for. B. designed as a roller seal and requires no further explanation.

Im absteigenden Bandlauf durchläuft das Band 1 zunächst den Erwärmungsteil 4 und anschließend den ersten Bereich des Kühlteils 5. Beiderseits des Bandes 1 befinden sich die stabilisierenden Beblasungsdüsensysteme 8l, 8r für den Erwärmungsteil und 91 und 9r für den Kühlteil.In the descending strip, the band 1 first passes through the heating part 4 and then the first portion of the cooling part 5. On both sides of the band 1 are the stabilizing Beblasungsdüsensysteme 8l, 8r for the heating part and 91 and 9r for the cooling part.

Am unteren Ende hat das Band einen Verlauf mit - von oben betrachtet - konkaver Krümmung. Dieser Verlauf befindet sich in einem Fluid 12, z. B. Wasser. Dieses Fluid 12, in der Regel eine geeignete Flüssigkeit, grenzt zugleich den Innenraum der Einhausung 6 gegen die Außenatmosphäre ab und trennt somit das Schutzgas von der Umgebungsluft.At the bottom of the tape has a course with - viewed from above - concave curvature. This course is in a fluid 12, z. B. water. This fluid 12, usually a suitable liquid, at the same time delimits the interior of the housing 6 from the outside atmosphere and thus separates the protective gas from the ambient air.

In dem Fluidbecken befinden sich sowohl auf der Innenkrümmung als auch auf der Außenkrümmung Düsensysteme 9i, 9a, die ähnlich wie die in der Gasatmosphäre arbeitenden Systeme 8 und 9 wirken, aber speziell auf den Betrieb mit dem Sperrfluid abgestimmt und entworfen sind und das Fluid, insbesondere Wasser, auf das Band 1 richten. Durch diese Fluiddüsen 9i, 9a werden auf das Band Stabilisierungskräfte ausgeübt, die auch dünne Bänder 1, die anderenfalls verlaufen würden, in der gewünschten konkaven Form führen. In einer besonders vorteilhaften Ausführungsform wirken diese Düsensysteme auch ähnlich wie eine Bandmittensteuerung lagestabilisierend in Richtung quer zum Bandlauf. Es ist aber auch möglich, solche Stabilisierungsdüsen nur im Bereich der vertikalen Schenkel des Bandlaufs, die den konkav gekrümmten Bereich eingrenzen, anzuordnen, so dass der Bandlauf dazwischen sich frei einstellen kann und nur die Lage im tiefsten Bereich durch den Sensor 10 überwacht wird.In the fluid basin, both on the inner curve and on the outer curve nozzle systems 9i, 9a, which act similar to the working in the gas atmosphere systems 8 and 9, but are designed and designed specifically for operation with the barrier fluid and the fluid, in particular Water, point to tape 1. By means of these fluid nozzles 9i, 9a, stabilizing forces are exerted on the band which also guide thin bands 1, which would otherwise run, in the desired concave shape. In a particularly advantageous embodiment, these nozzle systems also act in a position-stabilizing manner in the direction transverse to the strip, similar to a strip center control. However, it is also possible to arrange such stabilizing nozzles only in the region of the vertical limbs of the strip run, which delimit the concavely curved region, so that the strip run between them can be adjusted freely and only the position in the lowest region is monitored by the sensor 10.

Die Lage des Bandlaufs wird im Tiefpunkt der konkaven Krümmung mittels mindestens eines Sensors 10 erfasst und kontrolliert, so dass die gewünschte Form unter allen Betriebsbedingungen erhalten bleibt. In einer Flüssigkeit als Sperrfluid arbeitet diese Höhenlageerfassung des Bandes vorteilhaft nach dem Echolotprinzip es ist aber ein Radar-Prinzip mit Mikrowellen möglich.The position of the tape run is detected and controlled in the low point of the concave curvature by means of at least one sensor 10, so that the desired shape is maintained under all operating conditions. In a liquid as a barrier fluid, this high-level detection of the band works advantageously on the echosounder principle but it is a radar principle with microwaves possible.

Weitere Details eines typischen Bandlaufs der Vorrichtung nach der Erfindung zeigt Figur 2. Die Abdichtung der Vorrichtung gegenüber der Außenatmosphäre erfolgt am Bandeinlauf durch eine Doppelrollenabdichtung 41. Die Rollenkombination 40 dient dem Abbau des Bandzuges von dem höheren Zug vor der Rollenkombination 40 auf den niedrigeren Zug im Wärmebehandlungsteil. In der ersten Umlenkung des Bandlaufs ist eine Steuerrolle 42 angeordnet. Vor dieser Steuerrolle 42 befindet sich ein Sensor zur Erfassung der Bandlage und hinter dieser Steuerrolle 42 eine weitere Andruckrolle kleineren Durchmessers, die auch bei geringem Bandzug ein Anliegen des Bandes 1 an der Umlenkrolle 42 sicherstellt.Further details of a typical tape run of the device according to the invention is shown FIG. 2 , The sealing of the device against the outside atmosphere takes place at the belt inlet by a double roller seal 41. The roller combination 40 serves to reduce the strip tension from the higher train before the roller combination 40 to the lower train in the heat treatment part. In the first deflection of the tape run a control roller 42 is arranged. Before this control roller 42 there is a sensor for detecting the band position and behind this control roller 42, a further pinch roller smaller diameter, which ensures a concern of the belt 1 on the guide roller 42 even at low tape tension.

Unterhalb der zweiten Umlenkrolle 2, die den Behandlungsbereich des Bandes eingrenzt, befindet sich eine Verschlusseinrichtung 43, die aus zwei senkrecht zum Band beweglichen Verschlussorganen besteht. Mit Hilfe dieser Verschlusseinrichtung 43 wird durch die durch den vorteilhaft wassergekühlten und mit Wärmeisolation versehenen Einlaufhals 44 gebildete Bandeintrittsöffnung in den Erwärmungsteil 4, der auch bei erheblicher Temperatur von z. B. ca. 950 °C betrieben werden kann, verschlossen, so dass keine Wärme beim Bandstillstand aus der Wärmebehandlungsteil 4 nach oben austreten kann und dort möglicherweise zu einer Beschädigung der Umlenkrolle 42 bzw. deren Beschichtung führt.Below the second deflection roller 2, which limits the treatment area of the band, there is a closure device 43, which consists of two closure members that are movable perpendicular to the band. With the help of this closure device 43 is formed by the advantageously water-cooled and provided with heat insulation inlet neck 44 band inlet opening in the heating part 4, which is also at a considerable temperature of z. B. about 950 ° C, closed, so that no heat during tape stall from the heat treatment part 4 can escape upwards and possibly there to damage the pulley 42 and their coating leads.

Zwischen Umlenkrolle 42 und Bandeintritt 7 in den Wärmebehandlungsteil 4 kann noch eine Kühlvorrichtung (nicht gezeichnet) vorgesehen werden, die unzulässig hohe Rollentemperaturen ausschließt. Eine solche Kühleinrichtung kann z. B. durch Beblasen des Bandes mit Schutzgas niedriger Temperatur arbeiten. Es kann auch vorteilhaft sein, die Rollenkombination 40 zum Abbau des Bandzuges auf den niedrigen Wert im Behandlungsteil unmittelbar vor dem Eintritt des Bandes in diesen anzuordnen, so dass die Rolle 2 sich erübrigt.Between deflection roller 42 and belt entry 7 in the heat treatment part 4, a cooling device (not shown) can still be provided, which excludes inadmissibly high roller temperatures. Such a cooling device can, for. B. by blowing the tape with inert gas low temperature work. It may also be advantageous to arrange the roller combination 40 to reduce the strip tension to the low value in the treatment part immediately before the entry of the strip into it, so that the roller 2 is unnecessary.

Der Wärmebehandlungsteil 4 und der darunter befindliche erste Bereich 5 des Kühlteils sind in Figur 2 durch das Bezugszeichen 45 angedeutet Aus dem Kühlteil 5 wird das Band 1 durch einen schutzgasdichten Kanal, der in den Flüssigkeitsverschluss 12 eintaucht, geführt. Das in Richtung der Rolle 3 laufende Band wird durch Abquetschrollen 11 geführt und das danach noch am Band anhaftende Fluid 12, in der Regel Wasser, mit dem Konvektionstrockner 13, der beheizt sein kann, getrocknet.The heat treatment part 4 and the lower part of the first part 5 of the cooling part are in FIG. 2 indicated by the reference numeral 45 From the cooling part 5, the band 1 is guided through a protective gas-tight channel, which dips into the liquid closure 12. The running in the direction of the roller 3 belt is guided by squeezing rollers 11 and then still adhering to the belt fluid 12, usually water, with the convection dryer 13, which may be heated, dried.

Figur 3 zeigt als Beispiel nähere Details der Ausführungsform mit vertikalem Bandlauf. In der Figur sind drei übereinander geordnete Erwärmungszonen 4 und eine unter diesen Erwärmungszonen 4 angebrachte Kühlzone 5 dargestellt. Die Strömungsführungen der drei Erwärmungszonen 4 und der darunter befindlichen Kühlzone 5 haben in dem in Figur 3 dargestellten Längsschnitt quer zum Bandlauf die Form eines U. Im Beispiel der Figur 3 weisen die Schenkel des U nach unten. Es ist aber auch die umgekehrte Anordnung, also nach oben weisende U-Schenkel. möglich. FIG. 3 shows, by way of example, further details of the vertical tape embodiment. In the figure, three superimposed heating zones 4 and one mounted under these heating zones 4 cooling zone 5 are shown. The flow guides of the three heating zones 4 and the cooling zone 5 located underneath have in the in FIG. 3 shown longitudinal section across the tape the shape of a U. In the example of FIG. 3 point the legs of the U down. It is but also the reverse arrangement, ie upward-pointing U-legs. possible.

Dabei sind auf der Außenseite des dem Band 1 zugewandten Schenkels des U die stabilisierenden Düsenfelder 23 angeordnet. Im von den Schenkeln des U umschlossenen Raum befinden sich in den Erwärmungszonen 4 Strahlheizrohre 25 und in der Kühlzone 5 Kühler 28, insbesondere Wärmetauscher. Zum Strömungsantrieb dienen Radialventilatoren 21, die mittels Stopfen, die mit Isoliermaterial gefüllt sind, in die Außenwand eingesetzt sind. Die Strömungsgehäuse 20 sind dabei über kronenartige Gebilde 22 mit der Tragkonstruktion des Ventilators 21 und darüber wiederum mit der Tragkonstruktion des Außengehäuses 6 verbunden. Die Kraftübertragung erfolgt an den Spitzen der Kronenzacken.In this case, the stabilizing nozzle fields 23 are arranged on the outside of the band 1 facing the leg of the U. In the space enclosed by the legs of the U are located in the heating zones 4 radiant tubes 25 and in the cooling zone 5 radiator 28, in particular heat exchanger. To drive the flow serve radial fans 21, which are inserted by means of plugs which are filled with insulating material in the outer wall. The flow housing 20 are connected via crown-like structure 22 with the support structure of the fan 21 and in turn with the support structure of the outer housing 6. The power is transmitted to the tips of the crown teeth.

Die Ausführung dieser Befestigung in Form von Kronen stellt sicher, dass durch Wärmespannungen und Wärmedehnungen keine Beulen, Risse und dergleichen Schwierigkeiten auftreten können.The execution of this attachment in the form of crowns ensures that thermal stresses and thermal expansion no bumps, cracks and the like can occur difficulties.

Die Abgrenzung der Zonen voneinander wird im Erwärmungsteil mittels Trapezblechböden 26 vorgenommen. Bei dem ersten Boden 26 befindet sich unterhalb dieses Trapezbleches noch eine Lage Isolierwerkstoff 27, so dass zwischen der ersten und der zweiten Zone ein Temperaturunterschied eingestellt und aufrecht erhalten werden kann. Diese Ausführung des Zwischenbodens 26 in Verbindung mit Wärmeisolierung 27 ist natürlich zwischen allen Zonen möglich.The delimitation of the zones from each other is carried out in the heating part by means of trapezoidal sheet metal floors 26. At the first bottom 26 is below this trapezoidal sheet still a layer of insulating material 27, so that between the first and the second zone, a temperature difference can be adjusted and maintained. This embodiment of the intermediate floor 26 in conjunction with thermal insulation 27 is of course possible between all zones.

Bei Vorrichtungen zum Betrieb bei hohen Temperaturen, z. B. oberhalb 800 °C im Erwärmungsteil, und Schutzgas mit hohem Wasserstoffanteil ist der in Figur 4 dargestellte Wandaufbau besonders vorteilhaft. Die Außenhaut besteht aus einem gasdicht geschweißten Stahlblechgehäuse 30. An dessen Innenwand sind Haltestifte 31 für Lagen 32 von Wärmeisolationsmaterial, z. B. durch Aufschweißen, befestigt. Diese auf die Außenwand 30 aufgebrachten Lagen 32 bestehen aus Fasern mit hohem SiO2-Anteil, die zwar gute mechanische Eigenschaften aufweisen, aber bei hohen Temperaturen oberhalb ca. 800 °C und Wasserstoffatmosphäre zum Zerfall neigen, da SiO2 zu SiO reduziert wird. Um einen intensiven Kontakt mit der Wasserstoffatmosphäre zu vermeiden, insbesondere aber um das Eindringen von heißem Wasserstoffgas in diese Lagen zu reduzieren, ist auf diese Lage 32 eine Folie 33 aus hochhitzebeständigem Werkstoff, z. B. einer Nickel-Chromlegierung aufgelegt. Auf diese Folie 33 werden dann weitere Lagen 34 aus mechanisch weniger fester, aber gegen Wasserstoff auch bei hoher Temperatur beständiger und erheblich teurerer, Al2O3-Faser aufgelegt.In devices for operation at high temperatures, eg. B. above 800 ° C in the heating part, and protective gas with a high hydrogen content is in FIG. 4 shown wall construction particularly advantageous. The outer skin consists of a gas-tight welded sheet steel housing 30. On the inner wall retaining pins 31 for layers 32 of thermal insulation material, eg. B. by welding, attached. These applied to the outer wall 30 layers 32 are made of fibers with a high SiO 2 content, which indeed have good mechanical properties, but tend to decompose at high temperatures above about 800 ° C and hydrogen atmosphere, since SiO 2 is reduced to SiO. In order to avoid intensive contact with the hydrogen atmosphere, but in particular to reduce the penetration of hot hydrogen gas in these layers, a film 33 made of highly heat-resistant material, for. B. a nickel-chromium alloy launched. On top of this film 33, further layers 34 of mechanically less strong, but resistant to hydrogen even at high temperature and considerably more expensive, Al 2 O 3 fiber are then launched.

Zur Abdeckung dient eine weitere Folie 33 aus hochhitzebeständigem Werkstoff, auf die als mechanischer Schutz relativ kleinformatige Blechelemente 35, vorzugsweise aus Lochblech, aufgelegt sind. Alle Lagen werden von Plättchen 36 gehalten, die auf die Stifte 31 aufgesteckt werden. Um die äußeren Faserlagen leicht auswechseln zu können, ist es zweckmäßig, solche Plättchen, vorzugsweise aus dünnem Blech gefertigt, auch als Zwischenbefestigung auf die erste Folienlage aufzubringen.To cover another film 33 is made of highly heat-resistant material, as a mechanical protection relatively small-sized sheet metal elements 35, preferably made of perforated plate, are placed. All layers are held by platelets 36, which are plugged onto the pins 31. In order to easily replace the outer fiber layers, it is expedient to apply such platelets, preferably made of thin sheet metal, as an intermediate attachment to the first film layer.

Wie man der obigen Beschreibung entnehmen kann, wird das Band 1 mit Prallstrahlen des Erwärmungs- bzw. Kühlfluides, insbesondere ein Gas, z.B. reiner Wasserstoff oder ein Wasserstoff/Stickstoffgemisch mit hohem Wasserstoffanteil, beblasen, wodurch eine flächenhafte Kraft auf das Band ausgeübt wird, die ähnlich einer Feder mit abnehmenden Abstand zwischen Band 1 und Düsenfeld zunimmt; dies führt zu einer lagestabilisierenden Wirkung auf das Band, wobei die Größe dieser Stabilisierungskraft von dem Staudruck des Beblasungsfluides im Düsenaustritt der Prallstrahlen abhängt.As can be seen from the above description, the belt 1 is subjected to impact blasting of the heating or cooling fluid, in particular a gas, e.g. pure hydrogen or a hydrogen / nitrogen mixture with high hydrogen content, blowing, whereby a planar force is exerted on the band, which increases like a spring with decreasing distance between Band 1 and nozzle field; this leads to a position-stabilizing effect on the strip, the size of this stabilizing force being dependent on the back pressure of the blowing fluid in the nozzle exit of the impact blasting.

Der Abstand zwischen den zu beiden Seiten des Bandes 1 angeordneten Düsenfeldern im Wärmebehandlungsteil ist in den beiden Bereichen Erwärmung 4 und Kühlung 5 im Wesentlichen jeweils konstant, was bedeutet, dass die Abstandsänderung maximal ±10% beträgt.The distance between the arranged on both sides of the belt 1 nozzle fields in the heat treatment part is substantially constant in the two areas heating 4 and 5 cooling, which means that the distance change is a maximum of ± 10%.

Ein geeignetes Düsensystem zur Erzielung der gewünschten Wirkung wird in der EP 0 864 518 B1 beschrieben und hat in Bandlaufrichtung aufeinanderfolgende Düsenflächen mit Düsenöffnungen aus Rundlöchern und/oder Schlitzdüsen, wobei sich die Breite der Düsenflächen - gemessen parallel zur Bandlaufrichtung - über der Breite des Düsenfeldes - gemessen senkrecht zur Bandlaufrichtung - ändert. Die Düsenflächen sind mindestens teilweise an ihrem Umfang durch Schlitzdüsen eingefasst.A suitable nozzle system for achieving the desired effect is in the EP 0 864 518 B1 described and has in the direction of tape successive nozzle surfaces with nozzle openings of round holes and / or slot dies, wherein the width of the nozzle surfaces - measured parallel to the strip running direction - over the width of the nozzle array - measured perpendicular to the strip running direction - changes. The nozzle surfaces are at least partially bordered by slot nozzles at their periphery.

Dieses Stabilisierungsdüsensystem kann so ausgeführt und betrieben werden, dass das Band 1 durch das Düsensystem auch eine Stabilisierung quer zum Bandlauf erfährt, wobei diese Querstabilisierungswirkung im Bereich des Bandlaufs mit - von oben betrachtet - konkaver Krümmung besonders ausgeprägt ist.This stabilizing nozzle system can be designed and operated in such a way that the band 1 is stabilized transversely to the strip run by the nozzle system, this transverse stabilizing effect being particularly pronounced in the area of the strip run with concave curvature, viewed from above.

Als Sperrfluid für den Bereich 12 kommt jedes geeignete Fluid in Frage, wobei bevorzugt mit einer Flüssigkeit gearbeitet wird. Eine geeignete Flüssigkeit kann unter Berücksichtigung der chemischen Verträglichkeit mit dem Werkstoff der metallischen Bänder ausgewählt werden.As a barrier fluid for the area 12 is any suitable fluid in question, which is preferably carried out with a liquid. A suitable liquid may be selected taking into account the chemical compatibility with the metallic strip material.

Mit dieser Vorrichtung können sowohl Eisen- bzw. Stahlbänder als auch Bänder aus NE-Metallen behandelt werden.With this device, both iron and steel bands and bands of non-ferrous metals can be treated.

Claims (11)

  1. A device for heat treating metallic webs (1) guided in a non-contact manner, wherein in a gas atmosphere, the web (1) passes through a heating portion (4) first and then a first area of a cooling portion (5) of a heat treatment portion, descending vertically in-line, said device comprising:
    a) a casing (6),
    b) wherein the heat treatment portion consisting of the heating portion (4) and the cooling portion (5) is localised by rollers (2, 3);
    c) nozzle systems (8l, 8r; 9l, 9r) for heat treating the web by means of forced convection and for stabilising the position of the web by blowing the web (1);
    d) a bath of confining fluid (12), which serves to demarcate from the outer atmosphere, at the lower end of the descending run of the web, where the web (1) - as viewed from above - has a concave curvature, and from which the web (1) ascends to the rear roller (3) which localises the heat treatment portion,
    e) wherein in the confining fluid (12), nozzles (9i) which stabilise the position of the web are arranged above the web (1) and operated using the confining fluid, such that a web loop is set in the confining fluid (12) at the lower end of the descending run of the web;
    characterised in that:
    f) in the confining fluid (12), nozzles (9a) which stabilise the position of the web are arranged below the web (1) and operated using the confining fluid;
    g) in the trough of the area of the run of the web having a concave curvature, at least one sensor which operates in a non-contact manner is provided in the confining fluid (12) for detecting and controlling the position of the web and operates in accordance with the principle of echo-location or in accordance with the principle of radar using microwaves.
  2. The device according to claim 1, characterised in that the rollers (2, 3) which localise the treatment area (4, 5) are situated at different heights.
  3. The device according to at least one of claims 1 to 2, characterised in that the web (1) is also stabilised perpendicular to the run of the web by the nozzle system for blowing impact jets, said laterally stabilising effect being particularly pronounced in the area of the run of the web having a concave curvature, as viewed from above.
  4. The device according to any one of claims 1 to 3, characterised in that a suitable liquid, in particular water, is used as the confining fluid.
  5. The device according to at least one of claims 1 to 4, characterised in that the rollers which demarcate the treatment area at the web output are squeezing rollers (11).
  6. The device according to at least one of claims 1 to 5, characterised in that downstream - as viewed in the direction of the run of the web - of the turning roller (2) which demarcates the web treatment area at the web input (7), the web runs vertically and the lower end of the vertical run of the web is followed by the web curvature which is concave - as viewed from above - and situated in the confining fluid (12) which demarcates the treatment space.
  7. The device according to at least one of claims 1 to 6, characterised in that the web is blown, for the purpose of convectional heat transfer, by means of flow systems (20) which, in their longitudinal section as viewed perpendicular to the plane of the web:
    a) have the form of a U comprising legs (20 and 24) parallel to the run of the web (1),
    b) wherein the leg (24) of the U facing the web is fitted with the stabilising nozzle system (23), and
    c) a radial fan (21) is built into the leg (20) of the U facing away from the web, and
    d) the flow guide casing is attached to the outer wall with the aid of a crown-shaped component (22), wherein
    e) the force is transferred from the tips of the teeth of the crown onto the outer casing and the supporting structure connected to the outer casing.
  8. The device according to claim 7, characterised in that between the legs (20 and 24) of the U-shaped flow guide, jet heating pipes (25) are installed in the heating portion (4) for heating the device, and coolers (28), in particular heat exchangers, for cooling the blowing fluid are situated at this location in the cooling portion (5).
  9. The device according to at least one of claims 1 to 8, characterised in that individual zones of the device are demarcated from each other by intermediate bases made of sheet metal (26) which are formed as trapezoidal metal sheets.
  10. The device according to claim 9, characterised in that the intermediate bases made of trapezoidal sheet metal (26) are provided on at least one side with layers made of thermal insulation material (27) in order to reduce the temperature equalisation between adjacent zones.
  11. The device according to at least one of claims 1 to 10, characterised in that the stabilising nozzle system consists of nozzle panes which are consecutive in the direction of the run of the web and comprise nozzle openings made of round holes and/or slit nozzles, whose width - as measured parallel to the direction of the run of the web - changes over the width of the nozzle field as measured perpendicular to the direction of the run of the web, and in that the nozzle panes are at least partially bordered at their circumference by slit nozzles.
EP03029982A 2003-01-28 2003-12-30 Device for continuous heat treatment of metal strips Expired - Lifetime EP1443120B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10303228 2003-01-28
DE10303228A DE10303228B3 (en) 2003-01-28 2003-01-28 Device for heat treating metallic strips has a heat treatment section containing a heating region and a first cooling region, and nozzle fields for producing impact beams onto the strips

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EP1443120A1 EP1443120A1 (en) 2004-08-04
EP1443120B1 EP1443120B1 (en) 2006-07-12
EP1443120B2 true EP1443120B2 (en) 2010-10-13

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EP03029982A Expired - Lifetime EP1443120B2 (en) 2003-01-28 2003-12-30 Device for continuous heat treatment of metal strips

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US (1) US6895692B2 (en)
EP (1) EP1443120B2 (en)
AT (1) ATE332983T1 (en)
DE (2) DE10303228B3 (en)

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US20090044357A1 (en) * 2007-08-16 2009-02-19 The Procter & Gamble Company Electric toothbrushes
DE10326071B4 (en) * 2003-06-10 2005-09-01 Kramer, Carl, Prof. Dr.-Ing. Deflection device for moving belts
DE102004028236B3 (en) * 2004-06-11 2005-11-17 Rolf-Josef Schwartz Assembly for heating workpieces before shaping in a press, e.g. high tensile steel sheets for automobile bodywork components, has a kiln with a jet field and fans to give the workpieces a convective heating action
FI121309B (en) * 2006-06-01 2010-09-30 Outokumpu Oy A way to control the metal strip in the heat treatment furnace
DE102008029432B3 (en) * 2008-06-23 2009-09-17 Prinovis Ltd. & Co. Kg Drying system for continuous webs in the form of printed and / or coated paper webs
AT510468B1 (en) * 2010-09-21 2012-07-15 Voestalpine Stahl Gmbh FLOW FOOT FOR AN ESPECIALLY METALLIC TAPE
DE102012110010B4 (en) 2012-10-19 2016-09-01 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Apparatus and method for the continuous treatment of a metal strip
EP2818571B1 (en) * 2013-06-25 2017-02-08 Schwartz GmbH Diffusion of aluminium-silicon into a steel sheet web
CN103388965A (en) * 2013-06-26 2013-11-13 江苏中新资源集团有限公司 Cloth drier
DE102014118946B4 (en) * 2014-12-18 2018-12-20 Bwg Bergwerk- Und Walzwerk-Maschinenbau Gmbh Apparatus and method for the continuous treatment of a metal strip
CN105800376A (en) * 2016-04-29 2016-07-27 芜湖顺成电子有限公司 Wire transporting and take-up device
DE102017104909A1 (en) 2017-03-08 2018-09-13 Ebner Industrieofenbau Gmbh Bandschwebellage with a nozzle system

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Also Published As

Publication number Publication date
EP1443120A1 (en) 2004-08-04
US6895692B2 (en) 2005-05-24
ATE332983T1 (en) 2006-08-15
DE10303228B3 (en) 2004-04-15
US20040154182A1 (en) 2004-08-12
DE50304206D1 (en) 2006-08-24
EP1443120B1 (en) 2006-07-12

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