EP0142082B1 - Method and apparatus for galvanizing ribbed tubes - Google Patents
Method and apparatus for galvanizing ribbed tubes Download PDFInfo
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- EP0142082B1 EP0142082B1 EP84112869A EP84112869A EP0142082B1 EP 0142082 B1 EP0142082 B1 EP 0142082B1 EP 84112869 A EP84112869 A EP 84112869A EP 84112869 A EP84112869 A EP 84112869A EP 0142082 B1 EP0142082 B1 EP 0142082B1
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- blow
- facility
- zinc
- galvanising
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- 238000005246 galvanizing Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 23
- 239000011701 zinc Substances 0.000 claims abstract description 23
- 238000011282 treatment Methods 0.000 claims abstract description 15
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 238000005238 degreasing Methods 0.000 claims abstract description 9
- 238000004532 chromating Methods 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000005406 washing Methods 0.000 claims abstract 8
- 238000007598 dipping method Methods 0.000 claims abstract 4
- 239000000956 alloy Substances 0.000 claims abstract 2
- 229910045601 alloy Inorganic materials 0.000 claims abstract 2
- 230000004907 flux Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000005554 pickling Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- XEPNJJFNSJKTSO-UHFFFAOYSA-N azanium;zinc;chloride Chemical compound [NH4+].[Cl-].[Zn] XEPNJJFNSJKTSO-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- C23C2/38—Wires; Tubes
- C23C2/385—Tubes of specific length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/022—Cleaning travelling work
Definitions
- the invention relates to a system for hot-dip galvanizing finned tubes with system components arranged in line one behind the other at a treatment level, which are connected via an automatically operating transport device with horizontally and vertically attached support, guide and driving rollers or with a transport chain device in the preheating area.
- US-A-3 722 463 shows a further development of the system described in US-A-3 122 114 for the continuous production and galvanizing of smooth tubes.
- the individual smooth tubes are connected to form an endless tube.
- the pretreatment of the connected smooth tubes includes a flux treatment (zinc ammonium chloride) and subsequent drying at approx. 200 ° C.
- This procedure requires considerable exhaust air volumes with a large pollutant load in the galvanizing process due to the sublimation of the flux.
- Environmental protection-related requirements can only be met with a corresponding exhaust air detection and downstream cleaning system, with the overall system being considerably less economical.
- This known method and the device for the hot-dip galvanizing of pipes is only suitable for smooth pipes with the inclusion of a classic flux treatment and all the negative aspects resulting therefrom.
- the present invention includes a system for galvanizing finned tubes without the flux treatment necessary according to the aforementioned publication.
- the system according to the invention takes into account all specific requirements for hot-dip galvanizing the finned tube with variable handling of all relevant parameters and taking into account all requirements relevant to environmental protection.
- the finned tube essentially consists of an oval base tube (or other cross-sections) on which a sheet metal fin is endlessly wound diagonally in the winding process, the finned tube being significantly different from a smooth tube, not least because of the surface area increased by a factor of 40.
- Rib and base tube have no metallic connection and have considerable differences in material thickness. The division of the rib on the base tube is approx. 3 mm.
- the state of the art in hot-dip galvanizing finned tubes is immersion in a zinc melt with upstream degreasing, rinsing, pickling, rinsing and fluxing. These upstream treatments are individual separate processes, the finned tubes each in individual immersion baths containing the corresponding degreasing, rinsing, pickling or the like. B. be immersed by means of a crane. Cooling takes place after galvanizing in a water bath. Qualified immediate treatment of the finned tube after galvanizing is not possible.
- FR-A-2 181 863 and FR-A-2 323 772 systems for the continuous production of galvanized smooth pipes or for galvanizing smooth profiles are known, the system components mentioned in claim 1 in principle in FR-A -2 181 863 are described and the core of a system of this type, working under protective gas, with a preheating furnace and a galvanizing furnace is shown in principle in FR-A-2 323 772.
- the galvanizing furnace has no separate melting and charging areas which are separated by a partition.
- the advantages of the device according to the invention are, in particular, that it makes it possible to continuously pretreat finned tubes in closed treatment stages connected in quick succession without zinc galvanizing and aftertreatment, and thus in the optimal economical control of the zinc layer thickness with optimized technology the entire system, taking into account emission-relevant factors.
- the system for hot-dip galvanizing finned tubes consists essentially of loading device 1, degreasing device 2 with blow-off device, rinsing device 3 with blow-off device, pickling device 4 with blow-off device, rinsing device 5 with blow-off device, preheating furnace 6, galvanizing furnace 7 with blow-off, vibrating or stripping device, cooling and Drying device 8, chromating device 9 with blow-off device, removal device 10 and from a transport device, not shown.
- the finned tubes to be treated are automatically transported by means of the transport device consisting of support, guide and drive rollers or in the area of the preheating furnace from a transport chain device.
- the transport speed is infinitely variable.
- the finned tubes are fed manually via the loading device 1.
- the treatment media are applied in the degreasing 2, rinsing 3, pickling 4, rinsing 5, cooling 8 and chromating 9 treatment stages by means of nozzles (not shown) in the spraying process.
- the applied media are blown off after each special treatment in order to avoid or minimize discharge losses.
- the indirectly gas-heated preheating furnace 6 is composed of several furnace segments which are equipped with individual controls.
- the finned tubes are thus advantageously heated in a sliding manner from room temperature to the galvanizing temperature in the zinc bath of approximately 450-560 ° C.
- the entire system works in a protective gas atmosphere, which prevents oxidation of the finned tubes in the preheating furnace 6.
- Nitrogen with a hydrogen content of approximately 10% is preferably used as the inert gas.
- the finned tubes are galvanized in the galvanizing furnace 7, also in a protective gas atmosphere in the temperature range of approx. 450 - 560 ° C, free of emissions and residues.
- the finned tubes in the galvanizing furnace 7, which is formed with a zinc charging area 20 and a melting area 18 with a galvanizing pan 12, are flooded with zinc 19 by means of a zinc pump 16.
- the arrangement of the galvanizing pan 12 over the melting area 18 in the galvanizing furnace 7 largely prevents leakage losses of the protective gas atmosphere 17 at the operating level of the zinc alloy.
- the zinc 19 discharged from the galvanizing pan 12 with the finned tube is blown off vertically by means of a blow-off device 13 or a mechanical stripping or vibrating device . away. The occurrence of bridges between the finned tube fins and the formation of a drainage edge is effectively prevented.
- the temporary corrosion protection is provided by the chromating.
- the galvanizing furnace 7 has a refractory lining 11.
- a zinc collecting container 14 is arranged below the blow-off device 13.
- the device according to the invention allows the use of any zinc alloy. Flux treatment is also possible, which can be followed by rinsing step 5.
- the flux can be applied similar to the treatment medium in the stages degreasing 2, rinsing 3, pickling 4, rinsing 5, cooling 8 and chromating 9. In order to avoid loss of discharge, the applied flux is blown off.
- the finned tubes pretreated in this way are heated in the indirectly gas-heated preheating furnace 6, which is composed of several furnace segments with individual controls.
- the heating of the finned tubes in the preheating takes place in the case of flux treatment thus advantageously slide from room temperature to about 150 0 C.
- the entire system operates in a protective gas atmosphere, which prevents oxidation of the finned tubes in the preheating zone 6.
- Nitrogen is preferably used as the inert gas.
- the finned tubes are also galvanized in a protective gas atmosphere 17 in the temperature range of approx. 450 - 560 ° C.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
- Chemically Coating (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Fire Alarms (AREA)
- Fire-Detection Mechanisms (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Description
Die Erfindung betrifft eine Anlage zum Feuerverzinken von Rippenrohren mit in Linie hintereinander auf einem Behandlungsniveau angeordneten Anlagenkomponenten, die über eine automatisch arbeitende Transporteinrichtung mit horizontal und vertikal angebrachten Stütz-, Führungs- und Treibrollen bzw. mit einer Transportketteneinrichtung im Vorwärmbereich verbunden sind.The invention relates to a system for hot-dip galvanizing finned tubes with system components arranged in line one behind the other at a treatment level, which are connected via an automatically operating transport device with horizontally and vertically attached support, guide and driving rollers or with a transport chain device in the preheating area.
In der US-A-3 722 463 ist eine Weiterentwicklung der in US-A-3 122 114 beschriebenen Anlage zur - kontinuierlichen Herstellung und Verzinkung von Glattrohren dargestellt. Die einzelnen Glattrohre sind hierbei zu einem Endlosrohr verbunden. Die Vorbehandlung der verbundenen Glattrohre schließt eine Flußmittelbehandlung (Zink-Ammonium-Chlorid) und anschließende Trocknung bei Ca. 200° C ein. Diese Verfahrensweise bedingt beim Verzinkungsvorgang durch das Sublimieren des Flußmittels erhebliche Abluftvolumina mit großer Schadstoffbeladung. Umweltschutzrelevanten Erfordernissen ist hierbei nur mit einer entsprechenden Ablufterfassung und nachgeschalteter Reinigungsanlage zu entsprechen bei hierbei bedingt erheblich reduzierter Wirtschaftlichkeit der Gesamtanlage. Dieses bekannte Verfahren und die Einrichtung für das Feuerverzinken von Rohren ist ausschließlich für Glattrohre geeignet unter Einbezug einer klassischen Flußmittelbehandlung und allen hierdurch entstehenden negativen Aspekten.US-A-3 722 463 shows a further development of the system described in US-A-3 122 114 for the continuous production and galvanizing of smooth tubes. The individual smooth tubes are connected to form an endless tube. The pretreatment of the connected smooth tubes includes a flux treatment (zinc ammonium chloride) and subsequent drying at approx. 200 ° C. This procedure requires considerable exhaust air volumes with a large pollutant load in the galvanizing process due to the sublimation of the flux. Environmental protection-related requirements can only be met with a corresponding exhaust air detection and downstream cleaning system, with the overall system being considerably less economical. This known method and the device for the hot-dip galvanizing of pipes is only suitable for smooth pipes with the inclusion of a classic flux treatment and all the negative aspects resulting therefrom.
Dagegen beinhaltet die vorliegende Erfindung eine Anlage zur Verzinkung von Rippenrohren ohne die nach der vorgenannten Druckschrift notwendige Flußmittelbehandlung. Die erfindungsgemäße Anlage berücksichtigt alle spezifischen Erfordernisse bei der Feuerverzinkung des Rippenrohres bei variabler Handhabung aller relevanten Parameter und unter Berücksichtigung aller umweltschutzrelevanten Erfordernisse.In contrast, the present invention includes a system for galvanizing finned tubes without the flux treatment necessary according to the aforementioned publication. The system according to the invention takes into account all specific requirements for hot-dip galvanizing the finned tube with variable handling of all relevant parameters and taking into account all requirements relevant to environmental protection.
Das Rippenrohr besteht im wesentlichen aus einem ovalen Grundrohr (oder anderen Querschnitten), auf dem eine Blechrippe im Wickelverfahren endlos diagonal aufgewickelt ist, wobei sich das Rippenrohr wesentlich von einem Glattrohr unterscheidet, nicht zuletzt durch die um den Faktor 40 vergrößerte Oberfläche. Rippe und Grundrohr besitzen keine metallische Verbindung und weisen erhebliche Unterschiede in den Materialstärken auf. Die Teilung der Rippe auf dem Grundrohr beträgt ca. 3 mm.The finned tube essentially consists of an oval base tube (or other cross-sections) on which a sheet metal fin is endlessly wound diagonally in the winding process, the finned tube being significantly different from a smooth tube, not least because of the surface area increased by a factor of 40. Rib and base tube have no metallic connection and have considerable differences in material thickness. The division of the rib on the base tube is approx. 3 mm.
Stand der Technik bei der Feuerverzinkung von Rippenrohren ist das Eintauchen in eine Zinkschmelze mit vorgeschaltetem Entfetten, Spülen, Beizen, Spülen und Fluxen. Diese vorgeschalteten Behandlungen sind einzelne separate Vorgänge, wobei die Rippenrohre jeweils in einzelne das entsprechende Entfettungs-, Spül-, Beiz- oder dgl. -medium enthaltende Tauchbäder z. B. mittels eines Kranes eingetaucht werden. Die Abkühlung erfolgt nach der Verzinkung im Wasserbad. Eine sofortige weitere Behandlung des Rippenrohres nach der Verzinkung ist hierbei qualifiziert nicht möglich.The state of the art in hot-dip galvanizing finned tubes is immersion in a zinc melt with upstream degreasing, rinsing, pickling, rinsing and fluxing. These upstream treatments are individual separate processes, the finned tubes each in individual immersion baths containing the corresponding degreasing, rinsing, pickling or the like. B. be immersed by means of a crane. Cooling takes place after galvanizing in a water bath. Qualified immediate treatment of the finned tube after galvanizing is not possible.
Die bei der Tauchverzinkung auftretenden Probleme sind bekannt, begründet in der komplizierten Geometrie des Rippenrohres. Eine zufriedenstellende Verzinkungsqualität ist insgesamt, wenn überhaupt, nur mit sehr hohem anlagentechnischen Aufwand zu erreichen bei gleichzeitig stark reduzierter Tauchfrequenz und somit erheblich beeinträchtigter Wirtschaftlichkeit.The problems that occur with hot dip galvanizing are known, due to the complicated geometry of the finned tube. If at all, satisfactory galvanizing quality can only be achieved, if at all, with a very high level of technical equipment and at the same time the diving frequency is greatly reduced and the economy is significantly impaired.
Für die Steuerung der Zinkauflage stehen nur wenige Parameter mit äußerst geringer Anwendungsbreite zur Verfügung.Only a few parameters with an extremely small range of applications are available for controlling the zinc coating.
Ferner sind aus der FR-A-2 181 863 und der FR-A-2 323 772 Anlagen zum kontinuierlichen Herstellen von verzinkten Glattrohren bzw. zum Galvanisieren von glatten Profilen bekannt, wobei die im Anspruch 1 erwähnten Anlagenkomponenten im Prinzip in der FR-A-2 181 863 beschrieben sind und das unter Schutzgas arbeitende Kernstück einer solchen Anlage mit einem Vorwärmofen und einem Verzinkungsofen im Prinzip in der FR-A-2 323 772 dargestellt ist. Bei den bekannten Anlagen hat der Verzinkungsofen jedoch keine gesonderten Schmelz- und Chargierbereiche, die durch eine Trennwand getrennt sind.Furthermore, from FR-A-2 181 863 and FR-A-2 323 772 systems for the continuous production of galvanized smooth pipes or for galvanizing smooth profiles are known, the system components mentioned in claim 1 in principle in FR-A -2 181 863 are described and the core of a system of this type, working under protective gas, with a preheating furnace and a galvanizing furnace is shown in principle in FR-A-2 323 772. In the known systems, however, the galvanizing furnace has no separate melting and charging areas which are separated by a partition.
Es ist Aufgabe der Erfindung, eine Einrichtung zum Feuerverzinken von Rippenrohren der eingangs genannten Art zu schaffen, die einen kontinuierlichen Durchlauf der Rippenrohre ermöglicht und durch Variieren von Parametern eine größtmögliche Anwendungsbandbreite unter Berücksichtigung der Wirtschaftlichkeit und der für den Umweltschutz relevanten Erfordernisse gewährleistet.It is an object of the invention to provide a device for hot-dip galvanizing finned tubes of the type mentioned at the outset, which enables the finned tubes to run continuously and, by varying parameters, ensures the widest possible range of applications, taking into account the economic efficiency and the requirements relevant to environmental protection.
Nach der Erfindung wird die Aufgabe durch die im Anspruch 1 angegebenen zum Stand der Technik unterschiedlichen Merkmale gelöst.According to the invention, the object is achieved by the features different from the prior art specified in claim 1.
In den Ansprüchen 2 und 3 sind vorteilhafte Ausführungen der Einrichtung nach Anspruch 1 angegeben.In the claims 2 and 3 advantageous embodiments of the device according to claim 1 are given.
Die Vorteile der Einrichtung nach der Erfindung liegen insbesondere darin, daß es ermöglicht wird, Rippenrohre in kurz hintereinander in Linie geschalteten, geschlossenen Behandlungsstufen kontinuierlich vorbehandeln, ohne größere Zinkausschleppverluste verzinken und nachbehandeln zu können, und damit in der optimalen wirtschaftlichen Steuerung der Zinkschichtdicke bei optimierter Technik der Gesamtanlage unter Berücksichtigung emissionsrelevanter Faktoren.The advantages of the device according to the invention are, in particular, that it makes it possible to continuously pretreat finned tubes in closed treatment stages connected in quick succession without zinc galvanizing and aftertreatment, and thus in the optimal economical control of the zinc layer thickness with optimized technology the entire system, taking into account emission-relevant factors.
Im folgenden wird die Erfindung anhand schematischer Zeichnungen näher erläutert Es zeigt
- Fig. 1 die Komponenten einer erfindungsgemäßen Anlage,
- Fig. 2 eine dieser Anlagenkomponenten, nämlich einen Verzinkungsofen im Längsschnitt.
- 1 shows the components of a system according to the invention,
- 2 one of these system components, namely a galvanizing furnace in longitudinal section.
Die Anlage zum Feuerverzinken von Rippenrohren besteht im wesentlichen aus Beschickungseinrichtung 1, Entfettungseinrichtung 2 mit Abblaseinrichtung, Spüleinrichtung 3 mit Abblaseinrichtung, Beizeinrichtung 4 mit Abblaseinrichtung, Spüleinrichtung 5 mit Abblaseinrichtung, Vorwärmofen 6, Verzinkungsofen 7 mit Abblas-, Rüttel- oder Abstreifvorrichtung, Kühl- und Trockeneinrichtung 8, Chromatierungseinrichtung 9 mit Abblaseinrichtung, Entnahmeeinrichtung 10 und aus einer nicht dargestellten Transporteinrichtung.The system for hot-dip galvanizing finned tubes consists essentially of loading device 1, degreasing device 2 with blow-off device, rinsing device 3 with blow-off device, pickling device 4 with blow-off device, rinsing device 5 with blow-off device, preheating
Die zu behandelnden Rippenrohre werden mittels des Transporteinrichtung, bestehend aus Stütz,- Führungs- und Treibrollen bzw. im Bereich des Vorwärmofens aus einer Transportketteneinrichtung, automatisch transportiert. Die Transportgeschwindigkeit ist stufenlos regelbar.The finned tubes to be treated are automatically transported by means of the transport device consisting of support, guide and drive rollers or in the area of the preheating furnace from a transport chain device. The transport speed is infinitely variable.
Die Zuführung der Rippenrohre erfolgt manuell über die Beschickungseinrichtung 1.The finned tubes are fed manually via the loading device 1.
Das Aufbringen der Behandlungsmedien in den Behandlungsstufen Entfetten 2, Spülen 3, Beizen 4, Spülen 5, Kühlen 8 und Chromatieren 9 erfolgt mittels nicht dargestellter Düsen im Spritzverfahren. Die aufgebrachten Medien werden jeweils nach der speziellen Behandlung abgeblasen, um Austragungsverluste zu vermeiden bzw. zu minimieren.The treatment media are applied in the degreasing 2, rinsing 3, pickling 4, rinsing 5, cooling 8 and chromating 9 treatment stages by means of nozzles (not shown) in the spraying process. The applied media are blown off after each special treatment in order to avoid or minimize discharge losses.
Der indirekt gasbeheizte Vorwärmofen 6 ist aus mehreren Ofensegmenten zusammengesetzt, die mit Einzelsteuerung ausgerüstet sind.The indirectly gas-heated preheating
Die Erwärmung der Rippenrohre erfolgt somit in vorteilhafter Weise gleitend von Raumtemperatur bis zur Verzinkungstemperatur im Zinkbad von ca. 450 - 560°C.The finned tubes are thus advantageously heated in a sliding manner from room temperature to the galvanizing temperature in the zinc bath of approximately 450-560 ° C.
Das Gesamtsystem arbeitet unter Schutzgasatmosphäre, wodurch eine Oxidation der Rippenrohre im Vorwärmofen 6 verhindert wird. Als Inertgas wird vorzugsweise Stickstoff mit einem Wasserstoffanteil von ca. 10 % eingesetzt.The entire system works in a protective gas atmosphere, which prevents oxidation of the finned tubes in the preheating
Die Verzinkung der Rippenrohre erfolgt im Verzinkungsofen 7 ebenfalls unter Schutzgasatmosphäre im Temperaturbereich von ca. 450 - 560° C emissions- und reststofffrei.The finned tubes are galvanized in the galvanizing
Hierbei werden die Rippenrohre in dem mit einem Zink-Chargierbereich 20 sowie einem Schmelzbereich 18 mit Verzinkungspfanne 12 ausgebildeten Verzinkunsofen 7 mittels Zinkpumpe 16 mit Zink 19 überflutet. Die Anordnung der Verzinkungspfanne 12 über dem Schmelzbereich 18 im Verzinkungsofen 7 verhindert bei Betriebsniveau der Zinklegierung weitestgehend Leckageverluste der Schutzgasatmosphäre 17. Das aus der Verzinkungspfanne 12 mit dem Rippenrohr ausgetragene Zink 19 wird mittels einer Abblaseinrichtung 13 bzw. einer mechanischen Abstreif- oder Rütteleinrichtung senkrecht abgeblasen bzw. entfernt. Das Auftreten von Brückenbildungen zwischen den Rippenrohrlamellen und die Bildung einer Ablaufkante ist wirksam unterbunden.Here, the finned tubes in the galvanizing
Der temporäre Korrosionsschutz ist durch die Chromatierung gegeben.The temporary corrosion protection is provided by the chromating.
Der Verzinkungsofen 7 hat eine Feuerfestauskleidung 11. Unterhalb der Abblaseinrichtung 13 ist ein Zinkauffangbehälter 14 angeordnet.The galvanizing
Selbstverständlich ermöglicht die Einrichtung nach der Erfindung die Verwendung beliebiger Zinklegierungen. Auch eine Flußmittelbehandlung ist möglich, welche der Spülstufe 5 nachgeschaltet werden kann.Of course, the device according to the invention allows the use of any zinc alloy. Flux treatment is also possible, which can be followed by rinsing step 5.
Das Flußmittel kann dabei ähnlich dem Behandlungsmedium in den Stufen Entfetten 2, Spülen 3, Beizen 4, Spülen 5, Kühlen 8 und Chromatieren 9 aufgebracht werden. Um Austragungsverluste zu vermeiden, wird das aufgebrachte Flußmittel abgeblasen.The flux can be applied similar to the treatment medium in the stages degreasing 2, rinsing 3, pickling 4, rinsing 5, cooling 8 and chromating 9. In order to avoid loss of discharge, the applied flux is blown off.
Die Erwärmung der in dieser Weise vorbehandelten Rippenrohre erfolgt in dem indirekt gasbeheizten Vorwärmofen 6, der aus mehreren Ofensegmenten mit Einzelsteuerung zusammengesetzt ist.The finned tubes pretreated in this way are heated in the indirectly gas-heated preheating
Die Erwärmung der Rippenrohre im Vorwärmofen erfolgt im Fall der Flußmittelbehandlung somit in vorteilhafter Weise gleitend von Raumtemperatur bis auf ca. 1500 C. The heating of the finned tubes in the preheating takes place in the case of flux treatment thus advantageously slide from room temperature to about 150 0 C.
Auch in diesem Fall arbeitet das Gesamtsystem unter Schutzgasatmosphäre, wodurch eine Oxidation der Rippenrohre in der Vorwärmzone 6 verhindert wird. Als Inertgas wird vorzugsweise Stickstoff eingesetzt.In this case too, the entire system operates in a protective gas atmosphere, which prevents oxidation of the finned tubes in the
Die Verzinkung der Rippenrohre erfolgt ebenfalls unter Schutzgasatmosphäre 17 im Temperaturbereich von ca. 450 - 560° C.The finned tubes are also galvanized in a
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT84112869T ATE43646T1 (en) | 1983-11-11 | 1984-10-25 | METHOD AND EQUIPMENT FOR HOT-DIP GALVANIZING. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3340813 | 1983-11-11 | ||
| DE3340813 | 1983-11-11 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0142082A2 EP0142082A2 (en) | 1985-05-22 |
| EP0142082A3 EP0142082A3 (en) | 1985-08-21 |
| EP0142082B1 true EP0142082B1 (en) | 1989-05-31 |
Family
ID=6214064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84112869A Expired EP0142082B1 (en) | 1983-11-11 | 1984-10-25 | Method and apparatus for galvanizing ribbed tubes |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0142082B1 (en) |
| JP (1) | JPS60169568A (en) |
| AT (1) | ATE43646T1 (en) |
| AU (2) | AU3529884A (en) |
| BR (1) | BR8405749A (en) |
| DD (1) | DD231085A1 (en) |
| DE (2) | DE3409935C1 (en) |
| ES (1) | ES8605865A1 (en) |
| GR (1) | GR80858B (en) |
| IN (1) | IN163652B (en) |
| YU (2) | YU187484A (en) |
| ZA (1) | ZA848756B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3720965A1 (en) * | 1987-06-25 | 1989-01-05 | Solms Juergen | Process and appliance for continuous hot galvanising of elongated articles to be galvanised |
| DE3935146A1 (en) * | 1989-09-06 | 1991-03-21 | Wirtz Gmbh & Co | Continuous hot dip zinc coating of rubber tubing - where tube sections are joined together and passed through pretreatment baths, zinc bath and cut |
| JPH04321895A (en) * | 1991-04-19 | 1992-11-11 | Nichias Corp | Fluid heating pipe |
| DE4324924A1 (en) * | 1993-07-24 | 1995-01-26 | Leybold Durferrit Gmbh | Device for cleaning and / or heat treatment of workpieces, in particular profile strips |
| DE4325452A1 (en) * | 1993-07-29 | 1995-04-06 | Theodor Willecke | Process and apparatus for hot-dip galvanising iron parts |
| EP0826788B1 (en) * | 1996-08-30 | 1999-12-29 | Balcke-Dürr GmbH | Galvanizing method |
| DE10320071A1 (en) * | 2003-05-05 | 2004-12-02 | Basf Ag | Esters of phosphorus-oxygen acids containing alkoxy groups and their use as corrosion inhibitors |
| DE102016106617A1 (en) * | 2016-03-21 | 2017-09-21 | Fontaine Holdings Nv | Hot-dip galvanizing plant and hot-dip galvanizing process |
| CN112481570A (en) * | 2019-09-12 | 2021-03-12 | 西藏中驰集团股份有限公司 | Novel galvanizing process flow and assembly line used by same |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2771056A (en) * | 1951-06-06 | 1956-11-20 | Selas Corp Of America | Apparatus for coating pipes |
| US3639142A (en) * | 1968-06-10 | 1972-02-01 | Bethlehem Steel Corp | Method of galvanizing |
| JPS5017420B1 (en) * | 1970-08-19 | 1975-06-20 | ||
| US3673980A (en) * | 1970-10-30 | 1972-07-04 | Theodore H Krengel | Protective and supporting means for apparatus for continuously coating steel strip |
| DE2105661A1 (en) * | 1971-02-05 | 1972-08-10 | Mandl J | Hot dip metal coating - with melt flow along workpiece surface |
| US3845540A (en) * | 1972-04-28 | 1974-11-05 | Maneely Illinois | Hot galvanizing process and apparatus |
| GB1433019A (en) * | 1973-06-26 | 1976-04-22 | Turner Lisle Ltd | Galvanizing plant |
| DE2406939A1 (en) * | 1974-02-14 | 1975-09-04 | Friedrich Heck | Coating tubes or bars with molten metal - by placing them on top of the bath and using the meniscus effect |
| FR2323772A1 (en) * | 1975-05-30 | 1977-04-08 | Delot Jose | CONTINUOUS METAL COATING PROCESS OF RIGID METAL PROFILES |
| GB1532554A (en) * | 1976-02-10 | 1978-11-15 | Raymond A | Metallic coating of metal tubes and similar work pieces |
-
1984
- 1984-03-17 DE DE3409935A patent/DE3409935C1/en not_active Expired
- 1984-10-25 AT AT84112869T patent/ATE43646T1/en not_active IP Right Cessation
- 1984-10-25 DE DE8484112869T patent/DE3478474D1/en not_active Expired
- 1984-10-25 EP EP84112869A patent/EP0142082B1/en not_active Expired
- 1984-11-06 GR GR80858A patent/GR80858B/en unknown
- 1984-11-07 DD DD84269223A patent/DD231085A1/en not_active IP Right Cessation
- 1984-11-07 YU YU01874/84A patent/YU187484A/en unknown
- 1984-11-07 IN IN774/CAL/84A patent/IN163652B/en unknown
- 1984-11-08 ES ES537521A patent/ES8605865A1/en not_active Expired
- 1984-11-09 JP JP59235378A patent/JPS60169568A/en active Pending
- 1984-11-09 BR BR8405749A patent/BR8405749A/en not_active IP Right Cessation
- 1984-11-09 AU AU35298/84A patent/AU3529884A/en not_active Abandoned
- 1984-11-09 ZA ZA848756A patent/ZA848756B/en unknown
-
1986
- 1986-08-20 YU YU01461/86A patent/YU146186A/en unknown
-
1989
- 1989-01-06 AU AU27790/89A patent/AU2779089A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| ES537521A0 (en) | 1985-12-16 |
| YU146186A (en) | 1988-06-30 |
| GR80858B (en) | 1985-02-27 |
| AU3529884A (en) | 1985-05-16 |
| EP0142082A3 (en) | 1985-08-21 |
| YU187484A (en) | 1988-04-30 |
| DE3409935C1 (en) | 1985-04-18 |
| DD231085A1 (en) | 1985-12-18 |
| AU2779089A (en) | 1989-04-27 |
| BR8405749A (en) | 1985-09-17 |
| ES8605865A1 (en) | 1985-12-16 |
| IN163652B (en) | 1988-10-22 |
| ATE43646T1 (en) | 1989-06-15 |
| DE3478474D1 (en) | 1989-07-06 |
| ZA848756B (en) | 1985-07-31 |
| EP0142082A2 (en) | 1985-05-22 |
| JPS60169568A (en) | 1985-09-03 |
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