EP0477710B1 - Apparatus for the continuous coating of liquid metal - Google Patents
Apparatus for the continuous coating of liquid metal Download PDFInfo
- Publication number
- EP0477710B1 EP0477710B1 EP91115664A EP91115664A EP0477710B1 EP 0477710 B1 EP0477710 B1 EP 0477710B1 EP 91115664 A EP91115664 A EP 91115664A EP 91115664 A EP91115664 A EP 91115664A EP 0477710 B1 EP0477710 B1 EP 0477710B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- coating
- liquid metal
- chamber
- continuous coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/24—Removing excess of molten coatings; Controlling or regulating the coating thickness using magnetic or electric fields
Definitions
- the present invention relates to a liquid metal continuous coating system with an approximately horizontal coating channel for coating long profile pieces, in particular for galvanizing steel profile pieces.
- Electromagnetic pumps need a magnetic yoke, which can be formed by a continuous reinforcing steel in a pump with a circular channel cross section.
- a magnetic yoke which can be formed by a continuous reinforcing steel in a pump with a circular channel cross section.
- an electromagnetic pump with a circular channel cross section and circular windings surrounding the channel is unable to hold the zinc in the coating channel.
- the magnetic inference is missing when there is no reinforcing steel passes through, so that in this case the liquid zinc can escape unhindered by the entry or exit.
- DE-B 1 120 079 describes a device for regulating the falling speed of a stream of molten metal, in which a comb-like slotted magnetic core, which is aligned parallel to the direction of flow, is attached to a vertical flow channel of rectangular cross-section on both broad sides, each 19 to the channel directed teeth and 18 interconnected induction coils.
- the channel is formed from numerous rings that are connected to each other by refractory cement, which can be joined together and are preferably made of corundum.
- the rings are coated with a refractory mass that has a heat-insulating effect and consists, for example, of an aluminum oxide powder contained in a casing.
- the invention has for its object to provide a liquid metal continuous coating system for long profile body of almost any cross-section, which prevents the liquid metal intended for coating from running out in the coating channel.
- a liquid metal continuous coating system for a long time Profile body with a heatable coating channel of approximately horizontal longitudinal axis and of horizontally flat cross section, each with a pair of electromagnets on the broad sides at both ends above and below the coating channel and with a feed channel for liquid metal.
- the electromagnets which normally consist of induction coils wound on iron cores
- a force is generated in the liquid metal between two opposing electromagnets, which is directed into the coating chamber.
- the liquid metal in the coating chamber is prevented from escaping against its gravity. Only a very thin layer of liquid metal adheres metallurgically to the continuous profile piece or profile body, the layer thickness of which depends on the temperature in the coating chamber and on the dwell time of the profile piece in the liquid metal.
- the temperature in the coating channel can be measured and controlled in a known manner. Then the layer thickness only depends on the throughput speed and on the horizontal length of the liquid metal bath. This length can be adjusted by shifting the pairs of electromagnets against each other from outside the coating channel. The liquid metal continued with the continuous profile pieces is replaced via the feed channel. The force applied in the liquid metal is approximately proportional to the current applied in the electromagnet.
- the system should preferably have a liquid metal furnace that keeps the fill level in the coating chamber constant and that is suitable for quick inspection and maintenance to empty the system.
- the supply channel for liquid Metal to the coating channel to be connected to a chamber of a heatable two-chamber furnace, the two chambers of which have a partition with an overflow above the coating channel and which - preferably below the partition - are connected to an electromagnetic pump.
- this pump maintains a level that keeps the coating channel filled without special regulation.
- coating metal can be refilled in solid or liquid form at intervals without affecting the filling level in the coating channel.
- the electromagnetic pump below the partition can be switched off, so that the coating channel empties into the two-chamber furnace.
- the supply of an inert gas in the upper region of the coating channel is expedient so that cold outside air does not penetrate into the coating channel and oxidize or solidify hot liquid metal there.
- a further embodiment of the invention is characterized in that the coating channel has interchangeable screens at the inlet and / or outlet, which are adapted to the continuous profile pieces at a short distance. On the one hand, this reduces the force required to hold the liquid metal in the coating channel and, on the other hand, the supply of cold outside air is reduced.
- induction coils are arranged on comb-shaped coil cores with teeth directed towards the coating channel as electromagnets on the broad sides of the coating channel.
- these induction coils can be mounted on their comb-shaped coil core in a fully wound form. The necessary magnetic inference is produced in each case via the back of the two comb-shaped coil cores opposite one another above and below the coating channel.
- Figure 1 shows a perspective view with a vertical partial longitudinal section through a liquid metal continuous coating system without a liquid metal furnace.
- FIG. 2 shows a vertical cross section through FIG. 1 in the area of the feed for the liquid metal and a section through a connected two-chamber furnace.
- a rectangular profile piece 1 runs through an inlet panel 2 into a horizontal coating channel 3 with a horizontally flat cross section. In operation, this channel 3 is filled with a liquid metal.
- the profile piece 1 exits through an outlet panel 4.
- the panels 2, 4 are interchangeable. They are adapted to the continuous profile pieces 1 with a small distance.
- a pair of electromagnets is arranged above and below the coating channel 3 both after the inlet orifice 2 and in front of the outlet orifice 4.
- Their induction coils 5 are arranged on comb-shaped coil cores 6, each with six teeth directed towards the coating channel 3. Coils 5 lying one above the other are wound in the same sense.
- the rectangular profile 1 passes through an electrically heated coating channel 3, which is filled with liquid metal in operation.
- This channel 3 is connected to a likewise electrically heatable two-chamber furnace 8 via a lateral horizontal feed channel 7 for liquid metal connected.
- the two-chamber furnace 8 has a likewise electrically heatable ceiling 9 with an insulated filler cap 10.
- a vertical partition 11 is arranged in the interior of the furnace 8 and has an overflow edge 12 somewhat above the highest point of the coating channel 3.
- An electromagnetic pump 13 below the two-chamber furnace 8 connects the two chambers 14 and 15 to one another via openings on the bottom. During operation in the chamber 15, it keeps the level of the liquid metal constant by means of the overflow 12.
- the coating channel 3 is constantly filled with constant pressure; if necessary, it can be emptied very quickly by switching off the electromagnetic pump 13.
- the chamber 14 can be charged with solid or liquid metal without this filling process being able to affect the fill level in the coating channel 3. Any deposits of oxides or impurities floating on top of the liquid metal are flushed into the chamber 14 via the overflow 12; therefore they cannot penetrate into the coating channel 3.
- the winding direction of the induction coils 5 below and above the coating channel 3 is indicated by a wire winding 16.
Abstract
Description
Die vorliegende Erfindung betrifft eine Flüssigmetall-Durchlaufbeschichtungsanlage mit einem annähernd waagerechten Beschichtungskanal für die Beschichtung langer Profilstücke, insbesondere zur Verzinkung von Stahl-Profilstücken.The present invention relates to a liquid metal continuous coating system with an approximately horizontal coating channel for coating long profile pieces, in particular for galvanizing steel profile pieces.
In der Zeitschrift "Stahl und Eisen" 25, Heft 26/89 vom 18.12.89, wird auf Seite 14 ein Verfahren zur kostengünstigen Verzinkung von Langprodukten, z. B. von Betonstahl, erwähnt. Das Verzinkungsbad soll eine Länge von 80 cm haben und von dem Stahl mit einer Geschwindigkeit von 80 m/min durchlaufen werden. Das Bad soll direkt im Anschluß an eine Walzstraße hinter einer Strahlentzunderungsanlage angeordnet werden; es enthält lediglich 600 kg Zink. Die Dicke der Zinkauflage wird durch zwei magnetische Köpfe gesteuert, die auch das Bad abdichten sollen. Dieses Verfahren ist von besonderem Interesse, weil man bei hoher Durchlaufgeschwindigkeit sehr geringe, aber dennoch gegen Korrosion ausreichende Zinkschichten aufbringen kann, was aus Kostengründen erwünscht ist. Die genannten elektromagnetischen Köpfe entsprechen in ihrer Wirkungsweise vermutlich elektromagnetischen Pumpen, die das zwangsläufig am Ein- und Austritt des Betonstahls vorhandene flüssige Zink im Beschichtungskanal festhalten sollen. Elektromagnetische Pumpen brauchen einen magnetischen Rückschluß, der bei einer Pumpe von kreisförmigem Kanalquerschnitt von einem durchlaufenden Betonstahl gebildet werden kann. Bei nicht-runden Profilen, beispielsweise Winkel- oder Flachprofilen, hat sich aber herausgestellt, daß eine elektromagnetische Pumpe mit kreisförmigem Kanalquerschnitt und kreisförmig den Kanal umgebenden Wicklungen nicht in der Lage ist, das Zink im Beschichtungskanal festzuhalten. Außerdem fehlt der magnetische Rückschluß, wenn gerade kein Betonstahl durchläuft, so daß in diesem Fall das flüssige Zink durch den Ein- oder Austritt ungehindert austreten kann.In the magazine "Stahl und Eisen" 25, issue 26/89 of December 18, 1989, on page 14 a process for the cost-effective galvanizing of long products, e.g. B. of reinforcing steel mentioned. The galvanizing bath should have a length of 80 cm and the steel should pass through it at a speed of 80 m / min. The bath is to be arranged directly after a rolling mill behind a beam descaling system; it only contains 600 kg of zinc. The thickness of the zinc coating is controlled by two magnetic heads, which are also intended to seal the bath. This process is of particular interest because, at a high throughput speed, it is possible to apply very small zinc layers which are nevertheless sufficient to prevent corrosion, which is desirable for reasons of cost. The electromagnetic heads mentioned correspond in their mode of operation to electromagnetic pumps, which are supposed to hold the liquid zinc inevitably at the entry and exit of the reinforcing steel in the coating channel. Electromagnetic pumps need a magnetic yoke, which can be formed by a continuous reinforcing steel in a pump with a circular channel cross section. In the case of non-round profiles, for example angular or flat profiles, it has been found that an electromagnetic pump with a circular channel cross section and circular windings surrounding the channel is unable to hold the zinc in the coating channel. In addition, the magnetic inference is missing when there is no reinforcing steel passes through, so that in this case the liquid zinc can escape unhindered by the entry or exit.
In der DE-B 1 120 079 wird eine Einrichtung zur Regelung der Fallgeschwindigkeit eines Stromes geschmolzenen Metalls beschrieben, bei der an einem senkrechten Strömungskanal von Rechteckquerschnitt an beiden Breitseiten je ein kammartig geschlitzter und parallel zur Strömungsrichtung ausgerichteter Magnetkern angebracht ist, der jeweils 19 zum Kanal gerichtete Zähne und 18 miteinander verschaltete Induktionsspulen trägt. Der Kanal wird gebildet aus zahlreichen, untereinander durch feuerfesten Zement verbundenen Ringen, die sich ineinander fügen lassen und vorzugsweise aus Korund gefertigt sind. Die Ringe sind mit einer feuerfesten Masse ummantelt, die wärmeisolierend wirkt und beispielsweise aus einem in einer Hülle enthaltenen Aluminiumoxidpulver besteht. Mit einem Dreiphasen-Wechselstrom, der gegenüberliegende Spulen im gleichen Sinn durchfließt, entsteht im Flüssigmetall eine Kraft, die bei entsprechender Schaltung dem freien Fall des Flüssigmetalls entgegenwirkt. Der Rechteckquerschnitt des Kanals hat sich als zweckmäßig herausgestellt, weil die an den Breitseiten eines Rechteckkanals angeordneten, einander gegenüberliegenden Induktionsspulen auf das Flüssigmetall im rechteckigen Kanal einen größeren Einfluß ausüben können als in einem runden Kanal. Eine Anwendung dieser Erkenntnisse auf eine Flüssigmetall-Durchlaufbeschichtungsanlage für lange Profilkörper ist daraus aber nicht erkennbar.DE-B 1 120 079 describes a device for regulating the falling speed of a stream of molten metal, in which a comb-like slotted magnetic core, which is aligned parallel to the direction of flow, is attached to a vertical flow channel of rectangular cross-section on both broad sides, each 19 to the channel directed teeth and 18 interconnected induction coils. The channel is formed from numerous rings that are connected to each other by refractory cement, which can be joined together and are preferably made of corundum. The rings are coated with a refractory mass that has a heat-insulating effect and consists, for example, of an aluminum oxide powder contained in a casing. With a three-phase alternating current, which flows through opposite coils in the same sense, a force is created in the liquid metal, which counteracts the free fall of the liquid metal when switched appropriately. The rectangular cross section of the channel has been found to be expedient because the induction coils arranged on the broad sides of a rectangular channel and lying opposite one another can exert a greater influence on the liquid metal in the rectangular channel than in a round channel. However, an application of these findings to a liquid metal continuous coating system for long profile bodies cannot be seen from this.
Der Erfindung liegt die Aufgabe zugrunde, eine Flüssigmetall-Durchlaufbeschichtungsanlage für lange Profilkörper von nahezu beliebigem Querschnitt anzugeben, die das zur Beschichtung vorgesehene flüssige Metall im Beschichtungskanal daran hindert auszulaufen.The invention has for its object to provide a liquid metal continuous coating system for long profile body of almost any cross-section, which prevents the liquid metal intended for coating from running out in the coating channel.
Diese Aufgabe wird erfindungsgemäß gelöst durch eine Flüssigmetall-Durchlaufbeschichtungsanlage für lange Profilkörper mit einem beheizbaren Beschichtungskanal von annähernd waagerechter Längsachse und von waagerecht-flachem Querschnitt, mit je einem Paar Elektromagneten an den Breitseiten an beiden Enden oberhalb und unterhalb des Beschichtungskanals und mit einem Zufuhrkanal für flüssiges Metall.This object is achieved by a liquid metal continuous coating system for a long time Profile body with a heatable coating channel of approximately horizontal longitudinal axis and of horizontally flat cross section, each with a pair of electromagnets on the broad sides at both ends above and below the coating channel and with a feed channel for liquid metal.
Wenn die Elektromagnete, die normalerweise aus auf Eisenkernen gewickelten Induktionsspulen bestehen, mit einem Mehrphasen-Wechselstrom beaufschlagt werden, entsteht bei entsprechender Schaltung zwischen jeweils zwei einander gegenüberliegenden Elektromagneten eine Kraft im Flüssigmetall, die jeweils in die Beschichtungskammer hinein gerichtet ist. Auf diese Weise wird das Flüssigmetall in der Beschichtungskammer entgegen seiner Schwerkraft daran gehindert auszulaufen. Auf dem durchlaufenden Profilstück oder Profilkörper haftet metallurgisch nur eine sehr dünne Flüssigmetallschicht, deren Schichtdicke von der Temperatur in der Beschichtungskammer und von der Verweilzeit des Profilstücks im Flüssigmetall abhängig ist.When a multi-phase alternating current is applied to the electromagnets, which normally consist of induction coils wound on iron cores, a force is generated in the liquid metal between two opposing electromagnets, which is directed into the coating chamber. In this way, the liquid metal in the coating chamber is prevented from escaping against its gravity. Only a very thin layer of liquid metal adheres metallurgically to the continuous profile piece or profile body, the layer thickness of which depends on the temperature in the coating chamber and on the dwell time of the profile piece in the liquid metal.
Die Temperatur im Beschichtungskanal kann in bekannter Weise gemessen und geregelt werden. Dann ist die Schichtdicke nur von der Durchlaufgeschwindigkeit und von der waagerechten Länge des Flüssigmetallbades abhängig. Diese Länge läßt sich durch Verschiebung der Elektromagnetenpaare gegeneinander von außerhalb des Beschichtungskanals einstellen. Das mit den durchlaufenden Profilstücken fortgeführte Flüssigmetall wird über den Zufuhrkanal ersetzt. Die im Flüssigmetall aufgebrachte Kraft ist annähernd proportional dem in den Elektromagneten aufgebrachten Strom.The temperature in the coating channel can be measured and controlled in a known manner. Then the layer thickness only depends on the throughput speed and on the horizontal length of the liquid metal bath. This length can be adjusted by shifting the pairs of electromagnets against each other from outside the coating channel. The liquid metal continued with the continuous profile pieces is replaced via the feed channel. The force applied in the liquid metal is approximately proportional to the current applied in the electromagnet.
Bevorzugt sollte die Anlage einen Flüssigmetall-Ofen haben, der in der Beschichtungskammer den Füllstand konstant hält und der zwecks Inspektion und Wartung zur schnellen Entleerung der Anlage geeignet ist. Dabei kann der Zufuhrkanal für flüssiges Metall zum Beschichtungskanal an eine Kammer eines beheizbaren Zweikammerofens angeschlossen sein, dessen beide Kammern eine Trennwand mit Überlauf oberhalb des Beschichtungskanals haben und die - bevorzugt unterhalb der Trennwand - mit einer elektromagnetischen Pumpe verbunden sind.The system should preferably have a liquid metal furnace that keeps the fill level in the coating chamber constant and that is suitable for quick inspection and maintenance to empty the system. The supply channel for liquid Metal to the coating channel to be connected to a chamber of a heatable two-chamber furnace, the two chambers of which have a partition with an overflow above the coating channel and which - preferably below the partition - are connected to an electromagnetic pump.
Diese Pumpe hält bei Betrieb in der mit dem Beschichtungskanal verbundenen Kammer und mit Hilfe des Überlaufs (ständiges Überlaufen) eine Füllstandshöhe konstant, die den Beschichtungskanal ohne besondere Regelung gefüllt hält. In der anderen Kammer kann in Abständen Beschichtungsmetall in fester oder flüssiger Form nachgefüllt werden, ohne daß sich das auf den Füllstand im Beschichtungskanal auswirkt. Zur Inspektion oder Wartung des Beschichtungskanals kann die elektromagnetische Pumpe unterhalb der Trennwand ausgeschaltet werden, so daß sich der Beschichtungskanal in den Zweikammerofen hinein entleert. Für diesen Fall ist die Zufuhr eines Inertgases im oberen Bereich des Beschichtungskanals zweckmäßig, damit nicht kalte Außenluft in den Beschichtungskanal eindringt und dort heißes Flüssigmetall oxidiert oder erstarren läßt. Aus den gleichen Gründen ist es auch zweckmäßig, den Ein- und Austritt für die durchlaufenden Profilstücke an dem Beschichtungskanal mit je einer Inertgaszufuhr zu versehen.During operation in the chamber connected to the coating channel and with the help of the overflow (constant overflow), this pump maintains a level that keeps the coating channel filled without special regulation. In the other chamber, coating metal can be refilled in solid or liquid form at intervals without affecting the filling level in the coating channel. For inspection or maintenance of the coating channel, the electromagnetic pump below the partition can be switched off, so that the coating channel empties into the two-chamber furnace. In this case, the supply of an inert gas in the upper region of the coating channel is expedient so that cold outside air does not penetrate into the coating channel and oxidize or solidify hot liquid metal there. For the same reasons, it is also expedient to provide the inlet and outlet for the continuous profile pieces on the coating channel with an inert gas supply in each case.
Eine weitere Ausgestaltung der Erfindung zeichnet sich dadurch aus, daß der Beschichtungskanal am Ein- und/oder Austritt auswechselbare Blenden hat, die den durchlaufenden Profilstücken mit geringem Abstand angepaßt sind. Damit wird einerseits die zum Festhalten des Flüssigmetalls im Beschichtungskanal notwendige Kraft verringert und andererseits die Zufuhr von kalter Außenluft herabgesetzt.A further embodiment of the invention is characterized in that the coating channel has interchangeable screens at the inlet and / or outlet, which are adapted to the continuous profile pieces at a short distance. On the one hand, this reduces the force required to hold the liquid metal in the coating channel and, on the other hand, the supply of cold outside air is reduced.
Eine weitere Ausbildung der Erfindung ist dadurch gegeben, daß als Elektromagnete an den Breitseiten des Beschichtungskanals Induktionsspulen auf kammförmigen Spulenkernen mit zum Beschichtungskanal gerichteten Zähnen angeordnet sind. Bei konstantem Zahnquerschnitt können diese Induktionsspulen auf ihrem kammförmigen Spulenkern in fertiggewickelter Form montiert werden. Der notwendige magnetische Rückschluß wird jeweils über den Rücken der beiden oberhalb und unterhalb des Beschichtungskanals einander gegenüberliegenden kammförmigen Spulenkerne hergestellt.A further embodiment of the invention is given in that induction coils are arranged on comb-shaped coil cores with teeth directed towards the coating channel as electromagnets on the broad sides of the coating channel. At With a constant tooth cross-section, these induction coils can be mounted on their comb-shaped coil core in a fully wound form. The necessary magnetic inference is produced in each case via the back of the two comb-shaped coil cores opposite one another above and below the coating channel.
Ausführungsbeispiele der Erfindung werden im folgenden anhand der Figuren 1 und 2 näher erläutert.Exemplary embodiments of the invention are explained in more detail below with reference to FIGS. 1 and 2.
Figur 1 zeigt eine perspektivische Darstellung mit einem senkrechten Teillängsschnitt durch eine Flüssigmetall-Durchlaufbeschichtungsanlage ohne einen Flüssigmetallofen. Figur 2 zeigt einen senkrechten Querschnitt durch Figur 1 im Bereich der Zufuhr für das flüssige Metall und einen Schnitt durch einen angeschlossenen Zweikammerofen.Figure 1 shows a perspective view with a vertical partial longitudinal section through a liquid metal continuous coating system without a liquid metal furnace. FIG. 2 shows a vertical cross section through FIG. 1 in the area of the feed for the liquid metal and a section through a connected two-chamber furnace.
Nach Figur 1 läuft ein Rechteck-Profilstück 1 durch eine Einlaufblende 2 in einen waagerechten Beschichtungskanal 3 von waagerecht-flachem Querschnitt ein. Dieser Kanal 3 ist im Betrieb mit einem flüssigen Metall gefüllt. Das Profilstück 1 tritt durch eine Auslaufblende 4 wieder aus. Die Blenden 2, 4 sind auswechselbar. Sie sind den durchlaufenden Profilstücken 1 mit geringem Abstand angepaßt. Sowohl im Anschluß an die Einlaufblende 2 als auch vor der Auslaufblende 4 ist oberhalb und unterhalb des Beschichtungskanals 3 je ein Paar Elektromagnete angeordnet. Ihre Induktionsspulen 5 sind auf kammförmigen Spulenkernen 6 mit jeweils sechs zum Beschichtungskanal 3 gerichteten Zähnen angeordnet. Übereinander liegende Spulen 5 sind im gleichen Sinne gewickelt.According to FIG. 1, a rectangular profile piece 1 runs through an inlet panel 2 into a horizontal coating channel 3 with a horizontally flat cross section. In operation, this channel 3 is filled with a liquid metal. The profile piece 1 exits through an outlet panel 4. The panels 2, 4 are interchangeable. They are adapted to the continuous profile pieces 1 with a small distance. A pair of electromagnets is arranged above and below the coating channel 3 both after the inlet orifice 2 and in front of the outlet orifice 4. Their
Nach Figur 2 durchläuft das Rechteck-Profil 1 einen elektrisch beheizten Beschichtungskanal 3, der im Betrieb mit Flüssigmetall gefüllt ist. Dieser Kanal 3 ist über einen seitlichen horizontalen Zufuhrkanal 7 für flüssiges Metall an einen ebenfalls elektrisch beheizbaren Zweikammerofen 8 angeschlossen. Der Zweikammerofen 8 besitzt eine ebenfalls elektrisch beheizbare Decke 9 mit einem isolierten Einfülldeckel 10. Im Inneren des Ofens 8 ist eine senkrechte Trennwand 11 angeordnet, die eine Überlaufkante 12 etwas oberhalb des höchsten Punktes des Beschichtungskanals 3 aufweist. Dadurch werden zwei Kammern gebildet, nämlich eine Vorratskammer 14 und eine Nachfüllkammer 15. Eine elektromagnetische Pumpe 13 unterhalb des Zweikammerofens 8 verbindet die beiden Kammern 14 und 15 miteinander über bodenseitige Öffnungen. Sie hält bei Betrieb in der Kammer 15 den Füllstand des Flüssigmetalls mittels des Überlaufs 12 konstant. Auf diese Weise ist der Beschichtungskanal 3 ständig mit konstantem Druck gefüllt; er kann bei Bedarf durch Ausschalten der elektromagnetischen Pumpe 13 sehr schnell entleert werden. Nach Abheben des Einfülldeckels 10 kann die Kammer 14 mit festem oder flüssigem Metall beschickt werden, ohne daß sich dieser Füllvorgang auf den Füllstand im Beschichtungskanal 3 auswirken kann. Eventuelle, oben auf dem Flüssigmetall schwimmende Ablagerungen aus Oxiden oder Verunreinigungen werden über den Überlauf 12 in die Kammer 14 gespült; sie können daher nicht in den Beschichtungskanal 3 eindringen. Mit einer Drahtwindung 16 ist die gleichsinnige Wicklungsrichtung der Induktionsspulen 5 unterhalb und oberhalb des Beschichtungskanals 3 angedeutet.According to Figure 2, the rectangular profile 1 passes through an electrically heated coating channel 3, which is filled with liquid metal in operation. This channel 3 is connected to a likewise electrically heatable two-chamber furnace 8 via a lateral horizontal feed channel 7 for liquid metal connected. The two-chamber furnace 8 has a likewise electrically
Mit der vorgestellten Durchlaufbeschichtungsanlage können unterschiedliche Profilstücke, auch mehrere gleichzeitig, mit Flüssigmetall, beispielsweise mit Zink, beschichtet werden. Sie eignet sich insbesondere zur Verzinkung von Betonstahl-Profilstücken. Auch eine Verzinnung, beispielsweise von Stahl -oder auch Kupferprofilstücken, ist mit dieser Anlage möglich.With the continuous coating system presented, different profile pieces, even several at the same time, can be coated with liquid metal, for example with zinc. It is particularly suitable for galvanizing rebar sections. Tinning, for example of steel or copper profile pieces, is also possible with this system.
Claims (6)
- Liquid metal continuous coating plant for long sections (1), in particular for the zinc coating of steel reinforcement bars for concrete, comprising a heatable coating channel (3) having a substantially horizontal longitudinal axis and horizontal flat cross-section, having a respective pair of electromagnets (5, 6) at the wide sides at both ends above and below the coating channel (3) and having a supply channel (7) for liquid metal.
- Continuous coating plant according to claim 1, characterized in that the supply channel (7) for liquid metal to the coating channel (3) is connected to a chamber (15) of a heatable two-chamber furnace (8) whose two chambers (14, 15) have a partition wall (11) with an overflow (12) above the coating channel (3), and that the chambers (14, 15) are connected to one another, preferably below the partition wall (11), by way of a pump (13).
- Continuous coating plant according to claim 1 or claim 2, characterised in that the coating channel (13) has at the inlet and/or outlet exchangeable diaphragms (2, 4) which match the sections (1) running through them with a small gap.
- Continuous coating plant according to one of claims 1 to 3, characterised in that at the wide sides of the coating channel (3) electromagnets (5, 6) with induction coils (5) on comb-shaped coil cores (6) with teeth oriented towards the coating channel (3) are arranged.
- Continuous coating plant according to one of claims 1 to 4, characterised in that the distance apart of the electromagnets (5, 6) is adjustable.
- Continuous coating plant according to one of claims 1 to 5, characterised in that the inlet and/or the outlet for the sections (1) running through is or are provided with an inert gas inlet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9013648U | 1990-09-28 | ||
| DE9013648U DE9013648U1 (en) | 1990-09-28 | 1990-09-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0477710A1 EP0477710A1 (en) | 1992-04-01 |
| EP0477710B1 true EP0477710B1 (en) | 1995-06-21 |
Family
ID=6857935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91115664A Expired - Lifetime EP0477710B1 (en) | 1990-09-28 | 1991-09-16 | Apparatus for the continuous coating of liquid metal |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0477710B1 (en) |
| AT (1) | ATE124093T1 (en) |
| DE (2) | DE9013648U1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4105159A1 (en) * | 1991-02-20 | 1992-08-27 | K A Schwan | Coated and ribbed reinforcing rod prodn. - involves rolling ribbing after coating process |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB777213A (en) * | 1952-04-09 | 1957-06-19 | Birlec Ltd | A new or improved method of, and apparatus for, controlling or preventing the discharge of molten metal from containers |
| JPS5129870B2 (en) * | 1973-05-15 | 1976-08-27 | ||
| JPS5129981B2 (en) * | 1973-07-17 | 1976-08-28 | ||
| FR2318239A1 (en) * | 1975-07-18 | 1977-02-11 | Pechiney Ugine Kuhlmann | High-speed coating of wire or strip - with e.g. aluminium, without diffusion between coating and substrate |
| FR2386359A1 (en) * | 1977-04-07 | 1978-11-03 | Labo Electronique Physique | Continuously coating carbon strip with polycrystalline silicon - by feeding strip through molten silicon, esp. used in mfr. of semiconductors such as solar batteries |
| JPS54150446A (en) * | 1978-05-19 | 1979-11-26 | Koshuha Netsuren Kk | Continuous coating layer formation of unbonded pc steel rod and apparatus therefor |
| US4242150A (en) * | 1979-05-25 | 1980-12-30 | Maxwell Herris M | Method of producing reinforcing bars with corrosion resistant coating |
| EP0059070A1 (en) * | 1981-02-24 | 1982-09-01 | Spencer Clark Metal Industries Limited | Steel corrosion protected members |
| FR2539761A1 (en) * | 1983-01-26 | 1984-07-27 | Sp P Konstruktor | Installation for depositing a protective coating on rolled sections by a hot method |
| DE3303468C2 (en) * | 1983-02-02 | 1986-07-24 | Konakovskij zavod stal'nych konstrukcij, Konakovo, Kalininskaja oblast' | Plant for metallizing rolled profiles under protective gas |
| DD277089B1 (en) * | 1988-11-18 | 1993-02-11 | Ammendorf Waggonbau | DEVICE FOR OXIDE-FREE COATING OF METAL SURFACES IN MELT-LIQUID METAL BASES, IN PARTICULAR FOR TORQUE PROTECTION OF HIGH-VOLTAGE HEATING ELEMENTS |
| DZ1422A1 (en) * | 1989-06-09 | 2004-09-13 | Galva Lorraine | Method, procedure and installation for the continuous / intermittent coating of objects by passing said objects through a liquid mass of a coating product. |
-
1990
- 1990-09-28 DE DE9013648U patent/DE9013648U1/de not_active Expired - Lifetime
-
1991
- 1991-09-16 DE DE59105780T patent/DE59105780D1/en not_active Expired - Fee Related
- 1991-09-16 EP EP91115664A patent/EP0477710B1/en not_active Expired - Lifetime
- 1991-09-16 AT AT91115664T patent/ATE124093T1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| EP0477710A1 (en) | 1992-04-01 |
| DE9013648U1 (en) | 1992-02-06 |
| ATE124093T1 (en) | 1995-07-15 |
| DE59105780D1 (en) | 1995-07-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AT391432B (en) | DEVICE FOR HORIZONTAL CONTINUOUS CASTING | |
| DD299419A5 (en) | PROCESS, SAFETY AND EQUIPMENT FOR CONTINUOUS OR INTERMITTENT COATING OF OBJECTS | |
| DE4242380A1 (en) | Method and device for coating the surface of strand-like material | |
| DE2144377B2 (en) | Method and device for coating the inner surface of steel pipes with plastics | |
| CH665788A5 (en) | DEVICE FOR CONTINUOUSLY PRODUCING A LONG-TERM METAL OBJECT. | |
| DE2101547B2 (en) | Arrangement for regulating the outflow speed of a melt from a container | |
| DE4403049C1 (en) | Continuous caster and method for producing thin slabs | |
| EP0477710B1 (en) | Apparatus for the continuous coating of liquid metal | |
| DE2548939C2 (en) | Method and device for the continuous casting of strips | |
| EP0021219B1 (en) | Device for delivering or adjusting a flow of liquid metal in a tube | |
| DE102013212951A1 (en) | Casting rolling mill and method for producing metallic rolling stock | |
| DE60316568T2 (en) | BAND TEMPERATURE REGULATION IN A CONTINUOUS BELT PLANT | |
| CH666842A5 (en) | METHOD AND DEVICE FOR CONTINUOUSLY CASTING METALS IN THE FORM OF BAND BETWEEN TWO COOLED AXLE-PARALLEL DRUM. | |
| CH671533A5 (en) | ||
| EP0702608A1 (en) | Process and device for making semi-finished products | |
| CH695090A5 (en) | A method and an apparatus for producing a metal strip on a roll strip casting machine. | |
| DE2913024A1 (en) | PROCESS FOR COOLING AN OSCILLATING CONTINUOUS STEEL COLLAR | |
| EP0025604A1 (en) | Cooling element for industrial furnaces | |
| DD239546A5 (en) | METHOD FOR ADJUSTING THE HEIGHT OF THE GUIDE LINE OF THE FREE METAL SURFACE WITH THE COCKULE IN VERTICAL CASTING | |
| DE1949982B1 (en) | Electromagnetic conveyor trough for removing liquid metal from melting or holding vessels as well as a method for operating such a conveyor trough | |
| DE60224875T2 (en) | DEVICE AND METHOD FOR KEEPING LIQUID METAL IN CONTINUOUS MELT COATING OF METAL STRIP | |
| DE3331575C2 (en) | Process for continuous arc casting of metal, in particular steel | |
| DE3032789A1 (en) | Clad strip made by horizontal continuous casting and rolling - where metal strip is made into rectangular box filled with molten metal and then hot:rolled into clad strip | |
| DE2600696C2 (en) | Patenting system with molten metal kept in circulation | |
| DE19815007C2 (en) | Casting process for a metal strand |
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 |
Kind code of ref document: A1 Designated state(s): AT CH DE FR GB IT LI NL SE |
|
| 17P | Request for examination filed |
Effective date: 19920903 |
|
| 17Q | First examination report despatched |
Effective date: 19940503 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT CH DE FR GB IT LI NL SE |
|
| REF | Corresponds to: |
Ref document number: 124093 Country of ref document: AT Date of ref document: 19950715 Kind code of ref document: T |
|
| REF | Corresponds to: |
Ref document number: 59105780 Country of ref document: DE Date of ref document: 19950727 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19950717 |
|
| ET | Fr: translation filed | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19950821 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 19950825 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 19950912 Year of fee payment: 5 |
|
| ITF | It: translation for a ep patent filed |
Owner name: STUDIO JAUMANN |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19950919 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19950922 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19951116 Year of fee payment: 5 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19951215 Year of fee payment: 5 |
|
| 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 | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19960916 Ref country code: AT Effective date: 19960916 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19960917 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19960930 Ref country code: FR Effective date: 19960930 Ref country code: CH Effective date: 19960930 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19970401 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19960916 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 19970401 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19970603 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 91115664.4 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20050916 |