EP0692314A2 - Process and device for intensifying the contact between a rolled strip and a fluid - Google Patents
Process and device for intensifying the contact between a rolled strip and a fluid Download PDFInfo
- Publication number
- EP0692314A2 EP0692314A2 EP95108373A EP95108373A EP0692314A2 EP 0692314 A2 EP0692314 A2 EP 0692314A2 EP 95108373 A EP95108373 A EP 95108373A EP 95108373 A EP95108373 A EP 95108373A EP 0692314 A2 EP0692314 A2 EP 0692314A2
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- EP
- European Patent Office
- Prior art keywords
- liquid
- belt
- flow
- strip
- contact
- 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.)
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Links
- 238000000034 method Methods 0.000 title claims description 10
- 239000012530 fluid Substances 0.000 title 1
- 239000007788 liquid Substances 0.000 claims abstract description 54
- 238000001816 cooling Methods 0.000 claims description 10
- 238000005554 pickling Methods 0.000 description 13
- 238000005097 cold rolling Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
Definitions
- the invention relates to a method and a device for intensifying the contact between a rolled strip and a liquid, the latter being conveyed under pressure from a supply to an outlet member and emerging from it with an energy-intensive flow against the strip.
- relaxed water is preferably used for strip cooling and a suitable pickling liquid is used for descaling the surface.
- the belt runs through the pickling agent in the immersion bath. This results in the requirement that partially used stains are exchanged for fresh stains as quickly as possible and that these are supplied over the range. This is because the pickling effect and, accordingly, the permissible speed of the strip when passing through the pickling bath depend. In other words, the length of stay of the strip within the throughput path is directly related to fresh stain to be conveyed and brought into contact with the strip.
- the invention has for its object to provide a method and an apparatus with which it is possible to bring a sufficiently large amount of cooling or pickling liquid into intensive contact with a rolling strip for cooling or pickling, the liquid with a given flow energy and in a more uniform manner Distribution over the width and length of a wetting surface of the belt can be fed without risk of hooking the belt to be threaded and a corresponding device should have a particularly simple and robust construction.
- the object is achieved in a method of the type mentioned in the preamble of claim 1 with the invention in that the liquid is discharged perpendicularly against the belt in a closed jet with a flow profile which extends over the width of the belt and is relatively narrow across it at high speed , then the beam in a flow directed parallel to the course of the belt is continuously diverted and the flow is led along the belt over a contact distance of predetermined width and length and then discharged from the belt.
- One embodiment provides that the liquid is conveyed in a closed circuit from the supply against the belt and from there back into the supply, and the heat transferred from the belt is removed by intercooling.
- the measure By transferring kinetic energy of the highly accelerated liquid jet to the still liquid, parts of the liquid are entrained and conveyed through the contact path.
- the amount of liquid that is in motion or set in motion is significantly increased, thereby intensifying the contact between the rolled strip and the liquid.
- a device for carrying out the method with a storage container for the liquid with a booster pump arranged thereon, a pressure line and a pressure chamber connected to the latter and having at least one discharge member for the liquid is designed in such a way that the outlet member extends over the width of the belt Extending slot nozzle, the mouthpiece of which is relatively narrow at right angles to the width at a distance from the tape, with the slot nozzle downstream of which a flow guide body projecting beyond the mouthpiece is arranged, which forms a flow guide surface which is continuously curved in the downstream direction and which forms after deflection extends approximately 90 ° parallel to the belt and at a predetermined distance from it in the direction opposite to its direction of travel, forming a contact path and opens into a liquid drain channel.
- a defined flow path along a contact path of predetermined width and length, depending on, results with great advantage through the formation of the flow guide body Arrangement below or above or on both sides of the belt, with intensive wetting or flushing of the belt surface with cooling or pickling liquid being inevitable in the region of this contact path.
- the contact path between the flow guide surface and the belt is expediently designed with a predetermined flow cross-section, so that an adjustable flow rate is inevitably formed therein in accordance with the flow rate.
- Another embodiment of the invention provides that a cooler is arranged in the liquid drain channel. This allows the temperature of the liquid to be kept at a certain temperature level when the liquid is conveyed in a closed circuit. Further refinements are provided in accordance with the subclaims.
- the belt (1) moves in the direction of the arrow (2) over the device (40) for supplying liquid.
- devices (40) can be arranged one after the other both below and above the belt (1) and occasionally in any number.
- the device (40) has a storage container (20) for the liquid with a pressure booster pump (21) arranged thereon and a pressure line (22).
- a pressure chamber (23) with an outlet member (24) connects to the pressure line (22).
- This is in the form of a slot nozzle (24) which extends across the width of the band (1) and has a crosswise width relatively narrow mouthpiece (25).
- the slot nozzle (24) with its mouthpiece (25) is perpendicular to the band (1) against it. This avoids under all circumstances that a newly threaded band (1) could hook onto or into the nozzle (24).
- a protruding flow guide (27) is arranged downstream of the slot nozzle (24) or the mouthpiece (25).
- This has a flow guide surface (28) which is continuously curved in the downstream direction and, after deflection, extends approximately 90 ° parallel to the band (1) and at a predetermined distance from it, forming a contact path (26). This opens into a liquid drain channel (29).
- the contact path (26) is formed between the flow guide surface (28) and the belt (1) with a predetermined flow cross section and has a predetermined length.
- a cooler (30) can be arranged in the liquid drain channel (29). Therein, heat transferred from the belt (1) to the coolant is dissipated, thereby ensuring that the coolant circuit is not sustainably heated.
- the figure also shows an arrangement in which the device (40) in turn is designed such that it receives a still liquid (13) in the form of a liquid bath with the bath level (12).
- the exit of the closed liquid jet (10) from the mouthpiece (25) of the slot nozzle (24) emerges below the bath level (12) of the stationary liquid (13).
- Parts of the still liquid (13) are entrained and transferred by the kinetic energy of the highly accelerated liquid jet (10) to the stationary liquid (13)
- Contact path (26) conveyed through within the flow (11). Large quantities of liquid are set in motion and conveyed through the contact path (26).
- the figure also shows that the construction of the device (40) is very simple and robust. It results from the forced flow (11) in the contact section (26) a large wetting distance with a defined relative speed between the flow (26) and the belt (1). It should also be noted that at low belt speeds, the flow direction of the contact section can also be the same as the belt running direction.
- the device (40) for supplying liquid is arranged rotated by 180 ° with respect to the illustration. Because no high specific pressure is built up against the strip (1) in the contact section (26) and, moreover, there is a uniform pressure distribution over the cooling or pickling cross section, the method and the device designed for this purpose can also be used to cool thinly cast strips be used.
Abstract
Description
Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zur Intensivierung des Kontaktes zwischen einem Walzband und einer Flüssigkeit, wobei diese unter Druck aus einem Vorrat zu einem Austrittsorgan und aus diesem austretend mit einer energiereichen Strömung gegen das Band gefördert wird.The invention relates to a method and a device for intensifying the contact between a rolled strip and a liquid, the latter being conveyed under pressure from a supply to an outlet member and emerging from it with an energy-intensive flow against the strip.
Bei Bandanlagen von Warm- und Kaltwalzwerken sowie Beizen ist es in vielen Fällen erforderlich, daß das Band von einer oder beiden Seiten mit einem flüssigen Medium in intensiven Kontakt gebracht wird, und zwar:
- bei Warm- und Kaltwalzwerken zur Bandkühlung,
- beim Beizen zur Oberflächenentzunderung.
- in hot and cold rolling mills for strip cooling,
- when pickling for surface descaling.
Entsprechend wird zur Bandkühlung vorzugsweise entspanntes Wasser und zur Oberflächenentzunderung eine geeignete Beizflüssigkeit verwendet.Correspondingly, relaxed water is preferably used for strip cooling and a suitable pickling liquid is used for descaling the surface.
Bisher wurden bei Kaltwalzwerken Einzeldüsen oder kurze Schlitzdüsen eingesetzt. Bauartbedingt muß der Düsenaustritt gegen Einhaken des Bandes geschützt sein. Darüber hinaus ist eine Einstellung der Düsen nach Bandbreite erforderlich. Bei Warmwalzwerken werden üblicherweise sogenannte Laminarkühlstrecken verwendet, die aus einer Vielzahl von mit Düsen bestückten Einzelrohren bestehen.So far, single nozzles or short slot nozzles have been used in cold rolling mills. Due to the design, the nozzle outlet must be protected against hooking the belt. Beyond that adjustment of the nozzles according to bandwidth required. In hot rolling mills, so-called laminar cooling sections are usually used, which consist of a large number of individual tubes equipped with nozzles.
Beim Beizen durchläuft das Band das Beizmittel im Tauchbad. Hierbei ergibt sich die Forderung, daß teilweise verbrauchte Beize so schnell wie möglich gegen frische Beize ausgetauscht und diese über die Bandbreite zugeführt wird. Denn davon hängt die Beizwirkung und entsprechend die zulässige Geschwindigkeit des Bandes beim Durchlauf durch das Beizbad ab. Mit anderen Worten steht die Verweildauer des Bandes innerhalb der Durchlaufstrecke in direktem Zusammenhang mit nachzufördernder und mit dem Band in Kontakt zu bringender frischer Beize.When pickling, the belt runs through the pickling agent in the immersion bath. This results in the requirement that partially used stains are exchanged for fresh stains as quickly as possible and that these are supplied over the range. This is because the pickling effect and, accordingly, the permissible speed of the strip when passing through the pickling bath depend. In other words, the length of stay of the strip within the throughput path is directly related to fresh stain to be conveyed and brought into contact with the strip.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung anzugeben, mit welchen es gelingt, eine ausreichend große Menge an Kühl- oder Beizflüssigkeit in intensiven Kontakt mit einem Walzband zum Kühlen oder Beizen zu bringen, wobei die Flüssigkeit mit vorgegebener Strömungsenergie sowie in gleichmäßiger Verteilung über die Breite und Länge einer Benetzungsfläche des Bandes ohne Gefahr eines Einhakens des einzufädelnden Bandes zuführbar sein und eine entsprechende Vorrichtung eine besonders einfache und robuste Bauweise aufweisen soll.The invention has for its object to provide a method and an apparatus with which it is possible to bring a sufficiently large amount of cooling or pickling liquid into intensive contact with a rolling strip for cooling or pickling, the liquid with a given flow energy and in a more uniform manner Distribution over the width and length of a wetting surface of the belt can be fed without risk of hooking the belt to be threaded and a corresponding device should have a particularly simple and robust construction.
Die Lösung der Aufgabe gelingt bei einem Verfahren der im Oberbegriff von Anspruch 1 genannten Art mit der Erfindung dadurch, daß die Flüssigkeit in geschlossenem Strahl mit einem sich über die Breite des Bandes erstreckenden und quer dazu relativ engen Strömungsprofil unter hoher Geschwindigkeit senkrecht gegen das Band ausgetragen, sodann der Strahl in eine zum Bandverlauf parallel gerichtete Strömung stetig umgelenkt und die Strömung über eine Kontaktstrecke von vorgegebener Breite und Länge am Band entlang und danach vom Band abgeführt wird.The object is achieved in a method of the type mentioned in the preamble of claim 1 with the invention in that the liquid is discharged perpendicularly against the belt in a closed jet with a flow profile which extends over the width of the belt and is relatively narrow across it at high speed , then the beam in a flow directed parallel to the course of the belt is continuously diverted and the flow is led along the belt over a contact distance of predetermined width and length and then discharged from the belt.
Mit großem Vorteil wird durch die zwangsweise Zuführung der Flüssigkeit eine vorgegebene Menge an Kühl- oder Beizflüssigkeit gleichmäßig über die Breite des Bandes zugeführt, wobei sich über die gesamte Kontaktstrecke im Gleichgewicht zwischen dem dort ausgebildeten Strömungsquerschnitt und der zugeführten Flüssigkeitsmenge zwangsweise eine Strömungsgeschwindigkeit ausbildet, die zu einer Intensivierung des Kontaktes zwischen Walzband und Flüssigkeit führt.It is a great advantage that a predetermined amount of cooling or pickling liquid is fed evenly across the width of the belt due to the forced supply of the liquid, with a flow velocity that forms over the entire contact distance in equilibrium between the flow cross section formed there and the amount of liquid supplied leads to an intensification of the contact between the rolled strip and the liquid.
Dabei ergibt sich im Falle der Bandkühlung ein vergleichsweise hoher Wärmeübergang zwischen der strömenden Kühlflüssigkeit und dem Band, und im Falle der Beizung ein intensiver Austausch von verbrauchter Beize gegen frische Beize durch die erzwungene und damit intensive Strömung der Flüssigkeiten mit hoher Relativgeschwindigkeit zum Band.In the case of strip cooling, there is a comparatively high heat transfer between the flowing coolant and the strip, and in the case of pickling there is an intensive exchange of used stain for fresh stain due to the forced and thus intensive flow of the liquids at high relative speed to the strip.
Durch Umlenkung der Austrittsrichtung der druckbeaufschlagten Flüssigkeit um 90o ist es möglich, ein Strömungsprofil über die gesamte Breite des Bandes aufzubauen, ohne daß die Gefahr besteht, daß das Band am Austrittsorgan einhaken könnte.By deflecting the outlet direction of the pressurized liquid by 90 ° , it is possible to build up a flow profile over the entire width of the belt without the risk that the belt could hook onto the outlet member.
Eine Ausgestaltung sieht vor, daß die Flüssigkeit im geschlossenen Kreislauf aus dem Vorrat gegen das Band und von diesem wieder in den Vorrat zuückgefördert und dabei der Flüssigkeit vom Band übertragene Wärme durch Zwischenkühlung entzogen wird.One embodiment provides that the liquid is conveyed in a closed circuit from the supply against the belt and from there back into the supply, and the heat transferred from the belt is removed by intercooling.
Bei einer alternativen Ausführung kann von der Maßnahme Gebrauch gemacht sein, daß der Austritt der Flüssigkeit aus dem Austrittsorgan unterhalb des Badspiegels einer ruhenden Flüssigkeit vorgenommen wird. Dabei werden durch Übertragung von kinetischer Energie des hoch beschleunigten Flüssigkeitsstrahls an die ruhende Flüssigkeit Teile dieser mitgerissen und durch die Kontaktstrecke hindurchgefördert. Dabei wird die Menge der in Bewegung befindlichen bzw. in Bewegung gesetzten Flüssigkeit wesentlich erhöht und damit der Kontakt zwischen Walzband und Flüssigkeit intensiviert.In an alternative embodiment, use can be made of the measure that the liquid is discharged from the outlet member below the bath level of a stationary liquid. By transferring kinetic energy of the highly accelerated liquid jet to the still liquid, parts of the liquid are entrained and conveyed through the contact path. The amount of liquid that is in motion or set in motion is significantly increased, thereby intensifying the contact between the rolled strip and the liquid.
Eine Vorrichtung zur Durchführung des Verfahrens mit einem Vorratsbehälter für die Flüssigkeit mit daran angeordneter Druckerhöhungspumpe, einer Druckleitung und einer an diese angeschlossenen, wenigstens ein Austrittsorgan für die Flüssigkeit aufweisenden Druckkammer, ist in der Weise ausgebildet, daß das Austrittsorgan eine sich über die Breite des Bandes erstreckende Schlitzdüse ist, deren quer zur Breite relativ enges Mundstück im Abstand vom Band lotrecht gegen dieses gerichtet ist, wobei an die Schlitzdüse stromabwärts anschließend ein über deren Mundstück überstehender Strömungsleitkörper angeordnet ist, der eine in Richtung stromabwärts stetig gekrümmte Strömungsleitfläche bildet, die sich nach Umlenkung um annähernd 90o parallel zum Band und im vorgegebenen Abstand zu diesem gegen dessen Laufrichtung unter Ausbildung einer Kontaktstrecke erstreckt und in einen Flüssigkeitsablaufkanal einmündet.A device for carrying out the method with a storage container for the liquid with a booster pump arranged thereon, a pressure line and a pressure chamber connected to the latter and having at least one discharge member for the liquid is designed in such a way that the outlet member extends over the width of the belt Extending slot nozzle, the mouthpiece of which is relatively narrow at right angles to the width at a distance from the tape, with the slot nozzle downstream of which a flow guide body projecting beyond the mouthpiece is arranged, which forms a flow guide surface which is continuously curved in the downstream direction and which forms after deflection extends approximately 90 ° parallel to the belt and at a predetermined distance from it in the direction opposite to its direction of travel, forming a contact path and opens into a liquid drain channel.
Mit großem Vorteil ergibt sich durch Ausbildung des Strömungsleitkörpers ein definierter Strömungsweg entlang einer Kontaktstrecke von vorgegebener Breite und Länge je nach Anordnung unterhalb oder oberhalb oder zu beiden Seiten des Bandes, wobei im Bereich dieser Kontaktstrecke eine intensive Benetzung bzw. Bespülung der Bandoberfläche mit Kühl- oder Beizflüssigkeit zwangsläufig gegeben ist.A defined flow path along a contact path of predetermined width and length, depending on, results with great advantage through the formation of the flow guide body Arrangement below or above or on both sides of the belt, with intensive wetting or flushing of the belt surface with cooling or pickling liquid being inevitable in the region of this contact path.
Zweckmäßigerweise ist die Kontaktstrecke zwischen der Strömungsleitfläche und dem Band mit einem vorgegebenen Strömungsquerschnitt ausgebildet, so daß sich darin nach Maßgabe der Fördermenge zwangsweise eine einstellbare Strömungsgeschwindigkeit ausbildet.The contact path between the flow guide surface and the belt is expediently designed with a predetermined flow cross-section, so that an adjustable flow rate is inevitably formed therein in accordance with the flow rate.
Eine weitere Ausgestaltung der Erfindung sieht vor, daß im Flüssigkeitsablaufkanal ein Kühler angeordnet ist. Damit kann bei Förderung der Flüssigkeit im geschlossenen Kreislauf die Temperatur der Flüssigkeit auf einem bestimmten Temperaturniveau gehalten werden. Weitere Ausgestaltungen sind entsprechend den Unteransprüchen vorgesehen.Another embodiment of the invention provides that a cooler is arranged in the liquid drain channel. This allows the temperature of the liquid to be kept at a certain temperature level when the liquid is conveyed in a closed circuit. Further refinements are provided in accordance with the subclaims.
Die Erfindung wird im folgenden anhand einer rein schematischen Zeichnung dargestellt. Wie die Figur zeigt, bewegt sich das Band (1) in Richtung des Pfeiles (2) über die Vorrichtung (40) zur Zuführung von Flüssigkeit hinweg. Dabei sei bemerkt, daß derartige Vorrichtungen (40) sowohl unterhalb als auch oberhalb des Bandes (1) und fallweise in beliebiger Anzahl hintereinander angeordnet sein können.The invention is illustrated below with the aid of a purely schematic drawing. As the figure shows, the belt (1) moves in the direction of the arrow (2) over the device (40) for supplying liquid. It should be noted that such devices (40) can be arranged one after the other both below and above the belt (1) and occasionally in any number.
Die Vorrichtung (40) weist einen Vorratsbehälter (20) für die Flüssigkeit mit einer daran angeordneten Druckerhöhungspumpe (21) und einer Druckleitung (22) auf. An die Druckleitung (22) schließt sich eine Druckkammer (23) mit einem Austrittsorgan (24) an. Dieses ist als eine sich über die Breite des Bandes (1) erstreckende Schlitzdüse (24) mit einem quer zur Breite relativ engen Mundstück (25) ausgebildet. Die Schlitzdüse (24) mit ihrem Mundstück (25) ist im Abstand vom Band (1) lotrecht gegen dieses gerichtet. Dadurch wird unter allen Umständen vermieden, daß ein neu eingefädeltes Band (1) an oder in die Düse (24) einhaken könnte. An die Schlitzdüse (24) bzw. das Mundstück (25) stromabwärts anschließend ist ein überstehender Strömungsleitkörper (27) angeordnet. Dieser weist eine in Richtung stromabwärts stetig gekrümmte Strömungsleitfläche (28) auf, die sich nach Umlenkung um annähernd 90o parallel zum Band (1) und im vorgegebenen Abstand zu diesem unter Ausbildung einer Kontaktstrecke (26) erstreckt. Diese mündet in einen Flüssigkeitsablaufkanal (29) ein. Die Kontaktstrecke (26) ist zwischen der Strömungsleitfläche (28) und dem Band (1) mit einem vorgegebenen Strömungsquerschnitt ausgebildet und weist eine vorgegebene Länge auf.The device (40) has a storage container (20) for the liquid with a pressure booster pump (21) arranged thereon and a pressure line (22). A pressure chamber (23) with an outlet member (24) connects to the pressure line (22). This is in the form of a slot nozzle (24) which extends across the width of the band (1) and has a crosswise width relatively narrow mouthpiece (25). The slot nozzle (24) with its mouthpiece (25) is perpendicular to the band (1) against it. This avoids under all circumstances that a newly threaded band (1) could hook onto or into the nozzle (24). A protruding flow guide (27) is arranged downstream of the slot nozzle (24) or the mouthpiece (25). This has a flow guide surface (28) which is continuously curved in the downstream direction and, after deflection, extends approximately 90 ° parallel to the band (1) and at a predetermined distance from it, forming a contact path (26). This opens into a liquid drain channel (29). The contact path (26) is formed between the flow guide surface (28) and the belt (1) with a predetermined flow cross section and has a predetermined length.
Wie die Figur weiterhin zeigt, kann im Flüssigkeitsablaufkanal (29) ein Kühler (30) angeordnet sein. Darin wird vom Band (1) auf die Kühlflüssigkeit übertragene Wärme abgeführt und auf diese Weise dafür gesorgt, daß der Kreislauf des Kühlmittels nicht nachhaltig aufgeheizt wird.As the figure also shows, a cooler (30) can be arranged in the liquid drain channel (29). Therein, heat transferred from the belt (1) to the coolant is dissipated, thereby ensuring that the coolant circuit is not sustainably heated.
Die Figur zeigt weiterhin eine Anordnung, bei welcher die Vorrichtung (40) ihrerseits so ausgebildet ist, daß sie eine ruhende Flüssigkeit (13) in Form eines Flüssigkeitsbades mit dem Badspiegel (12) aufnimmt. In diesem Falle liegt der Austritt des geschlossenen Flüssigkeitsstrahles (10) aus dem Mundstück (25) der Schlitzdüse (24) austretend unterhalb des Badspiegels (12) der ruhenden Flüssigkeit (13). Dabei werden durch Übertragung von kinetischer Energie des hoch beschleunigten Flüssigkeitsstrahles (10) an die ruhende Flüssigkeit (13) Teile dieser mitgerissen und durch die Kontaktstrecke (26) innerhalb der Strömung (11) hindurchgefördert. Dabei werden große Mengen Flüssigkeit in Bewegung gesetzt und durch die Kontaktstrecke (26) hindurch gefördert.The figure also shows an arrangement in which the device (40) in turn is designed such that it receives a still liquid (13) in the form of a liquid bath with the bath level (12). In this case, the exit of the closed liquid jet (10) from the mouthpiece (25) of the slot nozzle (24) emerges below the bath level (12) of the stationary liquid (13). Parts of the still liquid (13) are entrained and transferred by the kinetic energy of the highly accelerated liquid jet (10) to the stationary liquid (13) Contact path (26) conveyed through within the flow (11). Large quantities of liquid are set in motion and conveyed through the contact path (26).
Die Figur zeigt ferner, daß die Bauart der Vorrichtung (40) sehr einfach und robust ist. Dabei ergibt sie durch die erzwungene Strömung (11) in der Kontaktstrecke (26) eine große Benetzungsstrecke mit definierter Relativgeschwindigkeit zwischen der Strömung (26) und dem Band (1). Weiter ist zu bemerken, daß bei geringer Bandgeschwindigkeit die Strömungsrichtung der Kontaktstrecke auch der Bandlaufrichtung gleichgerichtet sein kann. In diesem Falle ist die Vorrichtung (40) zur Zuführung von Flüssigkeit um 180o gegenüber der Darstellung gedreht angeordnet. Weil in der Kontaktstrecke (26) kein hoher spezifischer Druck gegen das Band (1) aufgebaut wird und darüberhinaus eine gleichmäßige Druckverteilung über den Kühl- bzw. Beizquerschnitt gegeben ist, kann das Verfahren bzw. die hierfür ausgebildete Vorrichtung auch zum Kühlen von dünn gegossenen Bändern eingesetzt werden.The figure also shows that the construction of the device (40) is very simple and robust. It results from the forced flow (11) in the contact section (26) a large wetting distance with a defined relative speed between the flow (26) and the belt (1). It should also be noted that at low belt speeds, the flow direction of the contact section can also be the same as the belt running direction. In this case, the device (40) for supplying liquid is arranged rotated by 180 ° with respect to the illustration. Because no high specific pressure is built up against the strip (1) in the contact section (26) and, moreover, there is a uniform pressure distribution over the cooling or pickling cross section, the method and the device designed for this purpose can also be used to cool thinly cast strips be used.
Claims (8)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4421082 | 1994-06-16 | ||
| DE4421082A DE4421082A1 (en) | 1994-06-16 | 1994-06-16 | Method and device for intensifying the contact between a rolled strip with a liquid |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0692314A2 true EP0692314A2 (en) | 1996-01-17 |
| EP0692314A3 EP0692314A3 (en) | 1996-12-11 |
| EP0692314B1 EP0692314B1 (en) | 2000-03-15 |
Family
ID=6520761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95108373A Expired - Lifetime EP0692314B1 (en) | 1994-06-16 | 1995-06-01 | Process and device for intensifying the contact between a rolled strip and a fluid |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0692314B1 (en) |
| JP (1) | JPH0857524A (en) |
| DE (2) | DE4421082A1 (en) |
| ES (1) | ES2144541T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998032899A1 (en) * | 1997-01-25 | 1998-07-30 | Sundwig Gmbh | Continuous chemical metal strip descaling process and device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10161985C1 (en) * | 2001-12-17 | 2003-07-03 | Airmatic Ges Umwelt & Tech Mbh | Cleaner for conveyed metal strip prior to coating has feed rollers for strip though housing with low pressure ventilator and spray nozzles |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2223096B1 (en) * | 1973-03-26 | 1976-09-10 | Usinor | |
| FR2261816B1 (en) * | 1974-02-21 | 1976-12-03 | Pechiney Aluminium | |
| JPH0680531B2 (en) * | 1984-12-11 | 1994-10-12 | 富士写真フイルム株式会社 | Magnetic recording medium coating method |
| JP2684485B2 (en) * | 1992-02-13 | 1997-12-03 | 富士写真フイルム株式会社 | Coating device |
-
1994
- 1994-06-16 DE DE4421082A patent/DE4421082A1/en not_active Withdrawn
-
1995
- 1995-06-01 ES ES95108373T patent/ES2144541T3/en not_active Expired - Lifetime
- 1995-06-01 EP EP95108373A patent/EP0692314B1/en not_active Expired - Lifetime
- 1995-06-01 DE DE59507983T patent/DE59507983D1/en not_active Expired - Fee Related
- 1995-06-14 JP JP7147702A patent/JPH0857524A/en not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| None |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998032899A1 (en) * | 1997-01-25 | 1998-07-30 | Sundwig Gmbh | Continuous chemical metal strip descaling process and device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0692314A3 (en) | 1996-12-11 |
| JPH0857524A (en) | 1996-03-05 |
| DE4421082A1 (en) | 1995-12-21 |
| DE59507983D1 (en) | 2000-04-20 |
| ES2144541T3 (en) | 2000-06-16 |
| EP0692314B1 (en) | 2000-03-15 |
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