EP0708186B1 - Procédé et appareil de traitement de surfaces en continu, en particulier pour le décapage et nettoyage de bandes - Google Patents

Procédé et appareil de traitement de surfaces en continu, en particulier pour le décapage et nettoyage de bandes Download PDF

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Publication number
EP0708186B1
EP0708186B1 EP95114997A EP95114997A EP0708186B1 EP 0708186 B1 EP0708186 B1 EP 0708186B1 EP 95114997 A EP95114997 A EP 95114997A EP 95114997 A EP95114997 A EP 95114997A EP 0708186 B1 EP0708186 B1 EP 0708186B1
Authority
EP
European Patent Office
Prior art keywords
pickling
strip
pickling liquid
nozzles
treatment chamber
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
Application number
EP95114997A
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German (de)
English (en)
Other versions
EP0708186A1 (fr
Inventor
Michael Zednicek
Wilhelm Hofkirchner
Wilhelm Dr. Karner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andritz Patentverwaltungs GmbH
Original Assignee
Andritz Patentverwaltungs GmbH
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Filing date
Publication date
Application filed by Andritz Patentverwaltungs GmbH filed Critical Andritz Patentverwaltungs GmbH
Publication of EP0708186A1 publication Critical patent/EP0708186A1/fr
Application granted granted Critical
Publication of EP0708186B1 publication Critical patent/EP0708186B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/021—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by dipping
    • 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 method for continuous surface treatment by pickling and cleaning metal strips, in one Treatment chamber, with the web in an approximately horizontal path runs through the treatment chamber, the treatment chamber one Pickling liquid is supplied, with a free surface of the pickling liquid is present and the surface to be treated in the Treatment chamber exposed to an increased shear force to the pickling liquid becomes. Furthermore, the invention relates to a device for implementation of the procedure.
  • DE-A-40 31 234 shows one Flat pickling, in which a band is passed through a container and the pickling liquid is fed through side-mounted nozzles.
  • the WHERE 88/01657 also shows a flat stain similar to that in DE-A-40 31 234 shown.
  • DE-OS 1 621 603 describes one of several Chamber existing system that is completely pressurized Pickling medium is filled. Due to the nozzle shape of the channel and the movement of the band and the flow of the liquid as well as the expansion cleaning of the belt surface of the medium is achieved here.
  • the DE-AS 1 521 753 describes a cleaning system especially for magnetic tapes for sound recordings, films or extruded metal profiles.
  • medium under pressure is supplied and flows through a nozzle-shaped channel along its length Beginning or end.
  • the supply of the treatment medium, in particular Pickling acid generally takes place at the entry or exit of the strip the treatment chamber, which additionally seals the treatment chamber from the environment, as well as laterally into the Treatment chamber.
  • DE-A-41 08 516 describes a high-speed pickling device, where the steel band in a channel is guided, which has openings for the supply and removal of pickling acid.
  • the present invention aims to improve treatment effectiveness, especially with pickling, to be increased by apparatus length or apparatus costs for a corresponding system or to significantly reduce the treatment temperature and thereby reduce operating costs.
  • the invention is therefore characterized in that the surface seen continuously by several devices with itself in the direction of tape travel narrowing cross section and that in the area of Application of the increased shear force, fresh pickling liquid supplied and the pickling liquid is swirled in this area.
  • This increased Shear force reduces the liquid boundary layer on the belt surface which results in an increased pickling effect and the pickling time is reduced. Through repeated treatment, the surface can be cleaned even better become.
  • the supply of pickling acid directly in the area of application the increased shear force and most swirled Liquid area ensures a quick introduction of pickling acid to the belt, which causes a further increased pickling intensity.
  • a favorable further development of the invention is characterized in that that the supply of the treating liquid is regulated in its amount, the pickling liquid supplied alone or in combination with the Quantity can be regulated. By varying the amount and or or the temperature of the pickling medium, the pickling effect can be adjusted accordingly the requirements vary.
  • An advantageous embodiment of the invention is characterized in that that the surface to be treated is in position by the pickling liquid fixed, especially in facilities to increase the shear force is centered.
  • the tape can touch the ground and produce Scratches in the belt can be avoided.
  • the invention also relates to a device for continuous surface treatment by pickling and cleaning metal strips, with a treatment chamber, the web being in an approximately horizontal Pathway runs through the treatment chamber, leaving a free surface the pickling liquid is present and is characterized by that several devices are provided in the treatment chamber, which increases the shear force between the belt and pickling liquid opposite to that caused by the movement of the web in the treatment chamber resulting shear force, the devices in the tape running direction seen an area with continuously narrowing Have cross section and that in the area of the devices nozzles Introduction of pickling liquid are provided. Through this increase The liquid boundary layer is reduced by shear force, resulting in an increased Pickling effect results.
  • the shape of a Venturi nozzle can be a good one Whirling of the liquid and thus an increase in the pickling intensity be effected. Furthermore, such a facility Height-centered belt, especially centered in the Venturi module, thus touching the ground and the associated generation of Scratching on the belt surface is avoided. Will be in the area of Facilities pickling liquid the liquid is whirled through even more, which, on the other hand, leads to a rapid introduction of the acid to the tape takes place, which causes an increased pickling intensity.
  • a favorable further development of the invention is characterized in that that the nozzles arranged in the direction of tape travel after the device are, these also, if necessary additionally, before or in the Device can be arranged.
  • the arrangement of the nozzles after setting up, the treatment medium is supplied in an area of increased fluidized fluid, with an injection additional swirling and before setting up in this area thus causes improved pickling intensity.
  • An arrangement of the nozzles in the device supports the hydrodynamic effect of the device and also avoids touching the belt with the device low speeds. Specifically a combination of all arrangements leads to an optimal pickling intensity.
  • An advantageous embodiment of the invention is characterized in that that the nozzles are arranged below the material web, the Alternatively or in combination, nozzles are arranged above the material web could be.
  • the nozzles can move in the direction of the belt pointing openings or pointing against the tape running direction Have openings. Through a suitable arrangement and alignment the pickling effect can additionally be influenced favorably.
  • a favorable further development of the invention is characterized in that that at least one derivation for pickling liquid is provided, which with Nozzles for supplying pickling liquid at at least one point in the Treatment chamber is connected.
  • An advantageous development of the invention is characterized in that that at least one pump is connected between discharge and supply is.
  • the circulation volume can be adjusted accordingly by controlling a pump set and also the exit speed from the Nozzles are adjusted accordingly for an optimal pickling effect.
  • a favorable embodiment of the invention is characterized in that that between discharge and supply of the pickling liquid at least one Heat supply device, in particular a heat exchanger, switched is.
  • a Heat exchanger in the additional Acid cycle can be the temperature distribution in the pickling tub influence particularly well, in particular a strong equalization the temperature can be achieved.
  • FIG. 2 a pickling section according to the invention
  • FIG. 2 a section from Fig. 1, Fig. 2a, 2b and Fig. 3 an analog section from Fig. 1, Fig. 4a, the pressure distribution in the area of an inventive provided device
  • Fig. 4b the speed distribution in the area of a device provided according to the invention
  • 5 shows the flow in the area of a device provided according to the invention represents.
  • Fig. 1 shows the diagram of a pickling section 1, that the better clarity because of without a usually arranged cover of the system is shown.
  • the steel strip 2 to be pickled moves in the direction 3.
  • an inlet area 4 with squeeze rollers 5.5 ' the strip through the pickling section 1 to an outlet area 6 with squeeze rollers 7 and 7 'performed.
  • Venturi modules 8 There are nozzles 9 for the supply of Pickling acid provided.
  • the pickling acid is always at the entrance 4 and or or outlet 6 via nozzle bar 10 in the pickling section 1 and spent pickling acid via outlets 11, 11 'into the circulation tank 12 returned.
  • the pickling acid is removed from the circulation tank 12 via a filter 13 to a pump 14 and from there through a heat exchanger 15, from where they are fed to the nozzle bar 10 via lines 16, 16 ' becomes.
  • a filter 13 to a pump 14 and from there through a heat exchanger 15, from where they are fed to the nozzle bar 10 via lines 16, 16 ' becomes.
  • one or more Place the pickling section 1 pickling liquid derived (17, 17 ') and by a Filters 18, 18 'via a pump 19, 19' and through a heat exchanger 20.20 'the nozzles 9 for reinforcement.
  • Fig. 2 shows a section of Fig. 1, in the two Venturi modules with an upper part 8 'and a lower part 8' 'are shown. Between these two parts 8 'and 8' 'of the Venturi modules 8, the Band 2 in the direction 3 and centered in height, so that a ground contact and the associated generation of scratches in volume 2 is avoided. In the area behind the Venturi modules 8 there are nozzles 9 provided by the pickling acid sprayed in the direction of the belt becomes. The acid level is marked with 21.
  • FIG. 2a and 2b show an analog section from FIG. 1, here in the In contrast to Fig. 2, the nozzles 9 in the direction 3 of the strip travel of the metal strip 2 are arranged in front of or in the Venturi modules 8. Basically these variants can also be combined, for example shown in Fig. 3, the orientation of the nozzles both an outflow can cause in as well as against the tape running direction 3. By a different quantity distribution of the leaking pickling liquid between the bottom and top of the band 2, the location of the Metal strip 2 can be set in the Venturi module 8.
  • FIG 4a shows the pressure curve 22 in area A of the cross-sectional constriction between the upper part 8 'and lower part 8' 'of the Venturi module 8.
  • the pressure increases from the entry into the Venturi module 8 and reaches approximately at the end of this section A the maximum value from where the pressure to completely dismantled in an area shortly after the Venturi module 8 becomes. Due to the symmetrical formation of the pressure curve in the Venturi module 8, the belt 2 is centered in the module.
  • FIG. 4b shows, analogously to FIG. 4a, the speed curve in the area a Venturi module 8. Due to the decreasing cross-section in the area A of the Venturi module 8 is based on a speed profile 23 an acceleration of the acid up to one via a profile 23 ' Profile 23 ".
  • the invention is not limited by the embodiments shown, in particular, the nozzles in the direction of tape travel or against the Direction of tape running. It can also have a cover be provided above the pickling section. Furthermore, within one Pickling section several separate pickling acid cycles can be provided, or several pickling sections can also be arranged one behind the other.

Claims (18)

  1. Procédé de traitement continu de la surface des bandes métalliques par le décapage et le nettoyage dans une chambre de traitement, où la bande parcourt la chambre de traitement à peu près horizontalement, un liquide de décapage se trouve amené vers la chambre de traitement, une surface du liquide de décapage libre étant existante, et la surface à traiter dans la chambre de traitement étant soumise à un effort de cisaillement augmenté dans la chambre de traitement par rapport au liquide de décapage, caractérisé en ce que la surface est menée à travers plusieurs dispositifs à section transversale toujours diminuant au sens du mouvement de la bande, et en ce que du liquide frais est amené dans la zone d'application d'effort de cisaillement augmenté, et le liquide se trouve tourbillonné dans cette aire.
  2. Procédé selon revendication 1, caractérisé en ce que le débit de l'amenée du liquide de décapage est contrôlé.
  3. Procédé selon une des revendications 1 ou 2, caractérisé en ce que la température de l'amenée du liquide de décapage est contrôlé.
  4. Procédé selon une des revendications 1 à 3, caractérisé en ce que la position de la surface à traiter est ajustée par le liquide de décapage.
  5. Procédé selon revendication 4, caractérisé en ce que la surface à traiter est centrée dans les dispositifs prévus pour augmenter l'effort de cisaillement.
  6. Dispositif de traitement continu de la surface des bandes métalliques par le décapage et le nettoyage dans une chambre de traitement (1), où la bande (2) parcourt la chambre de traitement (1) à peu près horizontalement, une surface (21) de liquide de décapage libre étant existante, caractérisé en ce que plusieurs dispositifs (8) sont prévus dans la chambre de traitement (1) qui effectuent une augmentation de l'effort de cisaillement entre la bande (2) et le liquide de décapage par rapport à l'effort résultant du mouvement (3) de la bande dans la chambre de traitement (1), les dispositifs (8) ayant une section transversale toujours diminuant au sens du mouvement (3) de la bande, et en ce que dans l'aire des dispositifs (8) des buses (9) sont prévues pour amener du liquide de décapage.
  7. Dispositif selon la revendication 6, caractérisé en ce que le bac de traitement est un bac de décapage (1).
  8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que les buses (9) sont positionnées en amont du dispositif (8) vu au sens du mouvement de la bande (3).
  9. Dispositif selon la revendication 6 à 8, caractérisé en ce que les buses (9) sont positionnées en aval du dispositif (8) vu au sens du mouvement de la bande (3).
  10. Dispositif selon une des revendications 6 à 9, caractérisé en ce que les buses (9) sont positionnées dans le dispositif (8).
  11. Dispositif selon une des revendications 6 à 10, caractérisé en ce que les buses (9) sont positionnées au dessous de la bande de matière (2).
  12. Dispositif selon une des revendications 6 à 11, caractérisé en ce que les buses (9) sont positionnées au dessus de la bande de matière (2).
  13. Dispositif selon une des revendications 6 à 12, caractérisé en ce que les buses (9) ont des ouvertures orientées au sens du mouvement de la bande. (3).
  14. Dispositif selon une des revendications 6 à 12, caractérisé en ce que les buses (9) ont des ouvertures orientées au contre-sens du mouvement de la bande. (3).
  15. Dispositif selon une des revendications 6 à 14, caractérisé en ce qu'au moins une décharge (17, 17') du liquide de décapage est prévue, et qui est connectée à des buses (9) pour l'amenée du liquide de décapage au moins à un point de la chambre de traitement (1).
  16. Dispositif selon la revendication 15, caractérisé en ce qu'entre la décharge (17, 17') et l'amenée du liquide de décapage au moins une pompe (19, 19') se trouve intercalée.
  17. Dispositif selon la revendication 15 ou 16, caractérisé en ce qu'entre la décharge (17, 17') et l'amenée du liquide de décapage au moins un dispositif d'amenée de chaleur (20, 20') se trouve intercalée.
  18. Dispositif selon la revendication 17, caractérisé en ce que le dispositif d'amenée de chaleur est un échangeur de chaleur (20, 20').
EP95114997A 1994-10-17 1995-09-23 Procédé et appareil de traitement de surfaces en continu, en particulier pour le décapage et nettoyage de bandes Expired - Lifetime EP0708186B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT1951/94 1994-10-17
AT195194 1994-10-17
AT0195194A AT404601B (de) 1994-10-17 1994-10-17 Verfahren u. vorrichtung zur kontinuierlichen oberflächenbehandlung, insbesondere zum beizen u. reinigen von bändern, beispielsweise metall-, insbesondere stahlbändern

Publications (2)

Publication Number Publication Date
EP0708186A1 EP0708186A1 (fr) 1996-04-24
EP0708186B1 true EP0708186B1 (fr) 1999-06-16

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Application Number Title Priority Date Filing Date
EP95114997A Expired - Lifetime EP0708186B1 (fr) 1994-10-17 1995-09-23 Procédé et appareil de traitement de surfaces en continu, en particulier pour le décapage et nettoyage de bandes

Country Status (9)

Country Link
US (1) US5716455A (fr)
EP (1) EP0708186B1 (fr)
KR (1) KR100359322B1 (fr)
AT (1) AT404601B (fr)
AU (1) AU704013B2 (fr)
DE (1) DE59506218D1 (fr)
FI (1) FI954903A (fr)
RU (1) RU2168562C2 (fr)
TW (1) TW309543B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT407759B (de) * 1997-11-28 2001-06-25 Andritz Patentverwaltung Verfahren und vorrichtung zum oberflächenbehandeln von bändern mit flüssigkeiten
US6305096B1 (en) * 1998-03-11 2001-10-23 Mitsubishi Heavy Industries, Ltd. Pickling device
AT408765B (de) * 1999-03-05 2002-03-25 Andritz Ag Maschf Anlage zur kontinuierlichen behandlung von stahlbändern
US6260563B1 (en) 1999-05-20 2001-07-17 Danieli Technology, Inc. High speed pickling with recycling of acid
US6814089B1 (en) * 2003-06-03 2004-11-09 The Material Works, Ltd. Conditioning liquid cleaning and recycling system for sheet metal conditioning apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6141783A (ja) * 1984-08-06 1986-02-28 Hitachi Ltd 高速酸洗装置

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DE1521753B1 (de) * 1963-10-22 1969-12-11 Gen Kinetics Inc Verfahren und Vorrichtung zum kontinuierlichen Reinigen von Bandmaterial mittels einer unter Druck stehenden Fluessigkeit
GB1143224A (en) * 1965-02-24 1969-02-19 Kovofinis Improvements in or relating to the continuous surface treatment of objects of simple shape
AT295956B (de) * 1969-07-08 1972-01-25 Ruthner Ind Planungs Ag Verfahren und Vorrichtung zur Führung von Tafeln oder endlosen Bändern durch aus flachen Rinnen gebildete Behälter
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US4270317A (en) * 1978-10-10 1981-06-02 Midland-Ross Corporation Apparatus used in the treatment of a continuous strip of metal and method of use thereof
JPS5767133A (en) * 1980-10-09 1982-04-23 Nippon Steel Corp Continuous annealing installation having adjusting device for strip surface
GB2085546B (en) * 1980-10-14 1984-08-30 Paramec Chemicals Ltd Scouring of elongate material
DE3629894A1 (de) * 1986-08-29 1988-03-03 Mannesmann Ag Anlage zur oberflaechenbehandlung von kontinuierlich durchlaufenden baendern, insbesondere beizanlage
JPS63227792A (ja) * 1986-10-28 1988-09-22 Kobe Steel Ltd チタンストリップ表面の均一酸洗方法及びその装置
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JPH0248086A (ja) * 1988-08-10 1990-02-16 Atsugi Unisia Corp 洗浄装置
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JP2965310B2 (ja) * 1990-03-16 1999-10-18 株式会社日立製作所 高速酸洗方法および装置
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Also Published As

Publication number Publication date
TW309543B (fr) 1997-07-01
DE59506218D1 (de) 1999-07-22
AT404601B (de) 1999-01-25
AU704013B2 (en) 1999-04-01
ATA195194A (de) 1998-05-15
FI954903A (fi) 1996-04-18
RU2168562C2 (ru) 2001-06-10
US5716455A (en) 1998-02-10
FI954903A0 (fi) 1995-10-16
AU3426995A (en) 1996-05-02
EP0708186A1 (fr) 1996-04-24
KR100359322B1 (ko) 2003-10-22
KR960014409A (ko) 1996-05-22

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