EP1258539A2 - Verfahren und Einrichtung zum Beschichten von Metallband, insbesondere von kaltgewalztem Stahlband - Google Patents
Verfahren und Einrichtung zum Beschichten von Metallband, insbesondere von kaltgewalztem Stahlband Download PDFInfo
- Publication number
- EP1258539A2 EP1258539A2 EP02009001A EP02009001A EP1258539A2 EP 1258539 A2 EP1258539 A2 EP 1258539A2 EP 02009001 A EP02009001 A EP 02009001A EP 02009001 A EP02009001 A EP 02009001A EP 1258539 A2 EP1258539 A2 EP 1258539A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- coating
- gas
- heating furnace
- cooling zone
- 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.)
- Withdrawn
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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
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
- C23C2/004—Snouts
-
- 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
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0224—Two or more thermal pretreatments
Definitions
- the invention relates to a method and a device for coating Metal strip, especially of cold-rolled steel strip, with an in Coating metal located in the melt state, wherein the metal strip in a Heating furnace is heated and annealed and then the in a cooling zone required strip temperature and surface properties can be set and in further steps through the coating container and in Direction of tape extraction behind the coating container Coating metal thickness and the solidification process with a gas powered Scraper can be controlled.
- the still liquid coating metal e.g. Zinc
- the still liquid coating metal, e.g. Zinc, on the surface of the strip is after pulling out of the coating container by means of the gas powered Stripper stripped and down into the coating metal container driven back.
- the invention has for its object the stripping behavior of the liquid Coating metal on the strip surface to improve on coating metal to save and still have a good surface quality achieve.
- the object is achieved in that in one Part of the cooling zone of the heating furnace for the operating gas Scraper is preheated.
- the gas can now be the scraper Stripping of the liquid coating metal can be supplied heated. Thereby improved stripping behavior is achieved on the belt surface. In turn this results in thinner coating metal thicknesses and a better one Surface quality possible.
- the preheated operating gas reduce the operating costs because the Volume expansion at elevated temperatures compared to the delivery condition there is less consumption in relation to the quantity delivered.
- One embodiment provides that the preheating is in a temperature range from 20 ° C to 250 ° C.
- a device for coating metal strip in particular cold-rolled steel strip with liquid coating metal, e.g. Zinc
- a heating furnace in which the metal strip by annealing and is adjustable to the coating strip temperature in a cooling zone with a coating container, behind which a gas-powered stripping device is arranged.
- the task is accomplished by solved this device according to the invention in that within the cooling zone of the Heating furnace for the metal strip, a heat exchanger is arranged in which the Gas for the stripping device is preheated.
- the heated operating gas can now with an amount of heat extracted from the heating furnace without additional Operating costs the effect of improved wiping behavior and thinner Effect coating metal layers.
- the low effort is also supported by the fact that the Heat exchanger can be used instead of one of the cooling zones in the heating furnace.
- Another advantage is achieved in that the heat exchanger instead of is provided at the exit of the heating furnace provided cooling zone.
- Another embodiment is that a feed for the preheated Gas from the stripping device directly from the heat exchanger to the stripping device runs.
- the supply for the preheated gas of the stripping device can be approximately along the channel running from the heating furnace to the coating container be arranged. As a result, there is no significant additional space for the facility needed.
- the device for coating metal strip 3 is then on a heating furnace 1, which has a cooling zone 1 a.
- the metal strip 3 runs through this cooling zone 1a in a band store 2 and is at the end by a Channel 1b led into a coating container 4 and through the coating metal 5, e.g. liquid zinc to a pulley 6 in the vertical direction deflected and coated.
- the layer thickness is set outside the Coating container 4 on a stripping device 7, in the preheated Operating gas, preferably air or nitrogen, against the coated metal strip 3 is blown and excess coating metal 5 back into the Coating container 4 is pushed back.
- the one with the coating thickness 8 Coated metal strip 9 is then removed in the strip pull-out direction 10.
- the coating thickness 8 can now be very thin and uniform and with good quality surface to be applied because the operating gas is air or Nitrogen is first passed into a heat exchanger 11, there by the heat of the Heating furnace 1 is heated and directly from the heat exchanger 11 via a Feed 12 is passed into the scraper device 7.
- the process gas preheated to 20 ° C to 250 ° C.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Coating Apparatus (AREA)
Abstract
Description
- 1
- Erwärmungsofen
- 1a
- Kühlzone
- 1b
- Kanal
- 1c
- Ausgang
- 2
- Bandspeicher
- 3
- Metallband
- 4
- Beschichtungsbehälter
- 5
- flüssiges Beschichtungsmetall
- 6
- Umlenkrolle
- 7
- Abstreifvorrichtung
- 8
- Beschichtungsdicke
- 9
- beschichtetes Metallband
- 10
- Bandauszugsrichtung
- 11
- Wärmetauscher
- 12
- Zuführung für das vorgewärmte Gas
Claims (8)
- Verfahren zum Beschichten von Metallband, insbesondere von kaltgewalztem Stahlband, mit einem im Schmelzenzustand befindlichen Beschichtungsmetall, wobei das Metallband in einem Erwärmungsofen erwärmt und geglüht wird und nachfolgend in einer Kühlzone die erforderliche Bandtemperatur und Oberflächeneigenschaften eingestellt werden und in weiteren Schritten durch den Beschichtungsbehälter geführt und in Bandauszugsrichtung hinter dem Beschichtungsbehälter die Beschichtungsmetalldicke und der Erstarrungsvorgang mit einer gasbetriebenen Abstreifvorrichtung gesteuert werden,
dadurch gekennzeichnet, dass in einem Teilbereich der Kühlzone des Erwärmungsofens das Betriebsgas für die Abstreifvorrichtung vorgewärmt wird. - Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass die Vorwärmung in einem Temperaturbereich von 20 °C bis 250 °C erfolgt. - Verfahren nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, dass für die Vorwärmung des Betriebsgases Luft, Stickstoff oder ein nichtoxidierendes Gas verwendet werden. - Einrichtung für die Beschichtung von Metallband, insbesondere von kaltgewalztem Stahlband, mit flüssigem Beschichtungsmetall, wie z.B. Zink, mit einem Erwärmungsofen, in dem das Metallband durch Glühen und in einer Kühlzone auf die Beschichtungs-Bandtemperatur einstellbar ist, mit einem Beschichtungsbehälter, hinter dem in Bandauszugsrichtung eine gasbetriebene Abstreifvorrichtung angeordnet ist,
dadurch gekennzeichnet, dass innerhalb der Kühlzone (1a) des Erwärmungsofens (1) für das Metallband (3) ein Wärmetauscher (11) angeordnet ist, in dem das Gas für die Abstreifvorrichtung (7) vorwärmbar ist. - Einrichtung nach Anspruch 4,
dadurch gekennzeichnet, dass der Wärmetauscher (11) anstelle einer der Kühlzonen (1a) im Erwärmungsofen (1) einsetzbar ist. - Einrichtung nach einem der Ansprüche 4 oder 5,
dadurch gekennzeichnet, dass der Wärmetauscher (11) anstelle der am Ausgang (1c) des Erwärmungsofens (1) vorgesehenen Kühlzone (1a) angeordnet ist. - Einrichtung nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, dass eine Zuführung (12) für das vorgewärmte Gas der Abstreifvorrichtung (7) unmittelbar vom Wärmetauscher (11) zur Abstreifvorrichtung (7) verläuft. - Einrichtung nach einem der Ansprüche 4 bis 7,
dadurch gekennzeichnet, dass die Zuführung (12) für das vorgewärmte Gas der Abstreifvorrichtung (7) etwa längs des vom Erwärmungsofen (1) zum Beschichtungsbehälter (4) verlaufenden Kanals (1b) angeordnet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10123784A DE10123784A1 (de) | 2001-05-16 | 2001-05-16 | Verfahren und Einrichtung zum Beschichten von Metallband, insbesondere von kaltgewalztem Stahlband |
| DE10123784 | 2001-05-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1258539A2 true EP1258539A2 (de) | 2002-11-20 |
| EP1258539A3 EP1258539A3 (de) | 2004-01-07 |
Family
ID=7684973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02009001A Withdrawn EP1258539A3 (de) | 2001-05-16 | 2002-04-23 | Verfahren und Einrichtung zum Beschichten von Metallband, insbesondere von kaltgewalztem Stahlband |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6800327B2 (de) |
| EP (1) | EP1258539A3 (de) |
| DE (1) | DE10123784A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3499418A (en) * | 1966-12-01 | 1970-03-10 | Nat Steel Corp | Continuous metallic strip hot-dip metal coating apparatus |
| US4330574A (en) * | 1979-04-16 | 1982-05-18 | Armco Inc. | Finishing method for conventional hot dip coating of a ferrous base metal strip with a molten coating metal |
| AU538925B2 (en) * | 1979-04-16 | 1984-09-06 | Ak Steel Corporation | Finishing of hop dip coating of ferrous base metal |
| JPS5672165A (en) * | 1979-11-14 | 1981-06-16 | Chugai Ro Kogyo Kaisha Ltd | Gas wiping method and apparatus using exhaust gas from nonoxidation furnace |
| US4519337A (en) * | 1979-11-26 | 1985-05-28 | Nisshin Steel Co., Ltd. | Apparatus for continuous hot dipping of metal strip |
| JPH0681093A (ja) * | 1992-08-31 | 1994-03-22 | Kawasaki Steel Corp | ストリップの溶融金属メッキ設備 |
-
2001
- 2001-05-16 DE DE10123784A patent/DE10123784A1/de active Granted
-
2002
- 2002-04-23 EP EP02009001A patent/EP1258539A3/de not_active Withdrawn
- 2002-05-16 US US10/147,282 patent/US6800327B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US6800327B2 (en) | 2004-10-05 |
| DE10123784A1 (de) | 2002-11-21 |
| US20020170493A1 (en) | 2002-11-21 |
| EP1258539A3 (de) | 2004-01-07 |
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