EP0708186A1 - 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
EP0708186A1
EP0708186A1 EP95114997A EP95114997A EP0708186A1 EP 0708186 A1 EP0708186 A1 EP 0708186A1 EP 95114997 A EP95114997 A EP 95114997A EP 95114997 A EP95114997 A EP 95114997A EP 0708186 A1 EP0708186 A1 EP 0708186A1
Authority
EP
European Patent Office
Prior art keywords
pickling
treatment liquid
nozzles
treatment
liquid
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.)
Granted
Application number
EP95114997A
Other languages
German (de)
English (en)
Other versions
EP0708186B1 (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
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Andritz Patentverwaltungs GmbH
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Publication date
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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, in particular for pickling and cleaning strips, for example metal strips, in particular steel strips, in a treatment chamber, the web running in an approximately horizontal path through the treatment chamber and a treatment liquid, in particular pickling liquid, being fed to the treatment chamber becomes.
  • the invention further relates to a device for carrying out the method.
  • the aim of the present invention is to increase the treatment effectiveness, especially in the case of pickling, in order to significantly reduce the length of the apparatus or apparatus costs for a corresponding system or to reduce the treatment temperature and thereby the operating costs.
  • the invention is therefore characterized in that the surface to be treated is exposed to an increased shear force to the treatment liquid, in particular pickling liquid. This increased shear force reduces the liquid boundary layer on the strip surface, which results in an increased pickling effect and the pickling time is reduced.
  • a further development of the method according to the invention is characterized in that fresh treatment liquid, in particular pickling liquid, is supplied in the area of application of the increased shear force and the treatment liquid is swirled in this area.
  • fresh treatment liquid in particular pickling liquid
  • the supply of the treatment liquid, in particular the pickling acid, directly in the area of the application of the increased shear force and in the most swirled liquid area ensures a rapid introduction of the pickling acid to the belt, which causes a further increased pickling intensity.
  • a favorable further development of the invention is characterized in that the amount of the treated liquid is regulated, whereby the amount of treatment liquid supplied can be regulated alone or in combination with the quantity.
  • the pickling effect can be varied according to the requirements.
  • An advantageous embodiment of the invention is characterized in that the surface to be treated is fixed in position by the treatment liquid, in particular centered in devices for increasing the shear force. Due to the fixation, in particular centering, of the belt, ground contact and the associated generation of scratches in the belt can be avoided.
  • the invention also relates to a device for continuous surface treatment, in particular for pickling and cleaning strips, for example metal strips, in particular steel strips, with a treatment chamber, the web running through the treatment chamber in an approximately horizontal path, and is primarily characterized in that in particular several devices in the treatment chamber, in particular pickling tub, are provided which achieve an increase in the shear force between the belt and the treatment liquid. This increased shear force reduces the liquid boundary layer, which results in an increased pickling effect.
  • a favorable further development of the invention is characterized in that the devices have an area with a continuously narrowing cross-section when viewed in the direction of tape travel.
  • This constricting cross-section which has, for example, the shape of a Venturi nozzle, allows a good swirling of the liquid and thus a Increase in pickling intensity can be caused.
  • the belt is centered in height by means of such a device, in particular also centered in the Venturi module, thereby avoiding contact with the ground and the associated generation of scratches on the belt surface.
  • An advantageous embodiment of the invention is characterized in that nozzles are provided in the area of the devices for introducing in particular fresh treatment liquid. If treatment liquid is injected in the area of the devices, on the one hand the liquid is swirled through even more, whereby on the other hand the acid, which is particularly fresh, is rapidly brought up to the strip, which causes an increased pickling intensity.
  • a favorable further development of the invention is characterized in that the nozzles are arranged after the device, as seen in the direction of travel of the belt, and these can also, if necessary additionally, be arranged before or in the device.
  • the treatment medium is supplied in an area of increased fluid which is swirled through, an injection in front of the device in this area causing additional swirling and thus improved pickling intensity.
  • An arrangement of the nozzles in the device supports the hydrodynamic effect of the device and prevents the belt from touching the device even at low speeds. Especially a combination of all arrangements leads to an optimal pickling intensity.
  • An advantageous embodiment of the invention is characterized in that the nozzles are arranged below the material web, wherein the nozzles can alternatively or in combination be arranged above the material web.
  • the nozzles can have openings pointing in the direction of tape travel or openings pointing in the direction of tape travel.
  • the pickling effect can also be influenced favorably by a suitable arrangement and alignment of the nozzles.
  • a favorable development of the invention is characterized in that at least one discharge line for treatment liquid is provided, which is connected to nozzles for supplying treatment liquid at at least one point in the treatment chamber.
  • An advantageous development of the invention is characterized in that at least one pump is connected between the discharge line and the supply line.
  • the circulating volume can be adjusted accordingly and the exit speed from the nozzles can be adjusted accordingly for an optimal pickling effect.
  • a favorable embodiment of the invention is characterized in that at least one heat supply device, in particular a heat exchanger, is connected between the discharge and supply of the treatment liquid.
  • a heat exchanger in the additional acid circuit, the temperature distribution in the pickling tank can be influenced particularly well, in particular a strong equalization of the temperature can be achieved.
  • FIG. 1 shows a pickling section according to the invention
  • FIG. 2 shows a section from FIG. 1
  • FIGS. 2a, 2b and FIG. 3 shows an analog section from FIG. 1
  • FIG 4a the pressure distribution in the area of a device provided according to the invention
  • FIG. 4b the speed distribution in the area of a device provided according to the invention
  • FIG. 5 shows the flow in the area of a device provided according to the invention.
  • Fig. 1 shows the diagram of a pickling section 1, which is shown for the sake of clarity without a cover of the system usually arranged.
  • the steel strip 2 to be pickled moves in the direction 3.
  • an inlet area 4 with squeeze rollers 5.5 ' the strip is guided through the pickling section 1 to an outlet area 6 with squeeze rollers 7 and 7'.
  • nozzles 9 are provided for supplying pickling acid.
  • the pickling acid is generally passed at the inlet 4 and / or outlet 6 via nozzle bars 10 into the pickling section 1 and used pickling acid is returned to the circulation tank 12 via outlets 11, 11 '.
  • the pickling acid is passed through a filter 13 to a pump 14 and from there through a heat exchanger 15, from where it is fed to the nozzle bar 10 via lines 16, 16 '.
  • pickling liquid is drained off at one or more points of the pickling section 1 (17, 17 ') and through a filter 18, 18' via a pump 19, 19 'and through a heat exchanger 20, 20' the nozzles 9 for reinforcement given up.
  • FIG. 2 shows a detail from FIG. 1, in which two Venturi modules, each 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 belt 2 is guided in the direction 3 and centered in height, so that contact with the ground and the associated generation of scratches in belt 2 is avoided. In the area behind the Venturi modules 8, nozzles 9 are provided, through which pickling acid is injected in the direction of the strip. The acid level is marked with 21.
  • FIG. 2a and 2b show an analogous section from FIG. 1, the nozzles 9 being arranged in the direction 3 of the strip travel of the metal strip 2 in front of or in the venturi modules 8, in contrast to FIG. 2.
  • these variants can also be combined, as shown by way of example in FIG. 3, the alignment of the nozzles being able to cause outflow both in and against the strip running direction 3.
  • the position of the metal strip 2 in the Venturi module 8 can be adjusted by a different distribution of the quantity of the pickling liquid flowing out between the underside and the upper side of the strip 2.
  • FIG 4a shows the pressure profile 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 is completely reduced again shortly after the Venturi module 8. Due to the symmetrical formation of the pressure curve in the Venturi module 8, the band 2 is centered in the module.
  • FIG. 4b shows, analogously to FIG. 4a, the speed curve in the area of a Venturi module 8. Due to the decreasing cross section in area A of the Venturi module 8, starting from a speed profile 23 via a profile 23 ', the acid is accelerated to a profile 23 ''.
  • FIG. 5 now shows the flow conditions in the area of a Venturi module 8, the flow direction being designated 24 at the inlet into the Venturi module 8 and a turbulent vortex flow 25 being recognizable in the area of the outlet of the module 8.
  • fresh treatment medium is supplied via the nozzles 9, which ensures that the fresh acid is brought up to the belt quickly, which causes an increased pickling intensity.
  • the invention is not limited by the embodiments shown, in particular the nozzles can also be directed in the tape running direction or against the tape running direction.
  • a cover can also be provided over the pickling section.
  • several separate pickling acid cycles can be provided within a pickling section, or several pickling sections can also be arranged one behind the other.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Paper (AREA)
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
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
AT195194 1994-10-17

Publications (2)

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

Family

ID=3524577

Family Applications (1)

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
KR100331357B1 (ko) * 1998-03-11 2002-04-09 마스다 노부유키 산세척장치
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 (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE1621603A1 (de) * 1965-02-24 1971-06-24 Kovofinish N P Verfahren zur kontinuierlichen Oberflaechenbehandlung- und Anordnung zum Durchfuehren dieses Verfahrens
EP0050036A1 (fr) * 1980-10-14 1982-04-21 Paromec Engineering Limited Nettoyage de matériaux de forme allongée et appareil pour l'éxécuter
WO1988001657A1 (fr) * 1986-08-29 1988-03-10 Mannesmann Ag Installation pour le traitement de surface de feuillards defilant en continu, notamment installation de decapage
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
JPH0248086A (ja) * 1988-08-10 1990-02-16 Atsugi Unisia Corp 洗浄装置
DE4108516A1 (de) * 1990-03-16 1991-09-19 Hitachi Ltd Hochgeschwindigkeits-beizvorrichtung und hochgeschwindigkeits-beizverfahren
DE4031234A1 (de) * 1990-10-04 1992-04-09 Gewerk Keramchemie Verfahren und vorrichtung zur oberflaechenbehandlung von bandfoermigem behandlungsgut

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Publication number Priority date Publication date Assignee Title
DE496147C (de) * 1928-07-25 1930-04-14 Julius Doubs Dipl Ing Verfahren und Vorrichtung zum Beizen und Spuelen von Feinblechen
US2307928A (en) * 1939-02-24 1943-01-12 Hanson Van Winkle Munning Co Process and apparatus for cleaning metal
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
CS163422B1 (fr) * 1971-06-22 1975-09-15
DE2201002A1 (de) * 1972-01-11 1973-10-31 Steuler Industriewerke Gmbh Beizanlage fuer stabfoermiges material
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
JPS6141783A (ja) * 1984-08-06 1986-02-28 Hitachi Ltd 高速酸洗装置
US4807653A (en) * 1987-01-30 1989-02-28 Wean Industries, Inc. Continuous treating of a strip-like product
US4996998A (en) * 1988-08-18 1991-03-05 Continental Installers Corporation Strip metal treating system
US4920995A (en) * 1988-08-18 1990-05-01 Continental Installers Corporation Process for continuous strip pickling
US5179967A (en) * 1991-08-28 1993-01-19 Nelson Steel Apparatus for rinsing metal strip

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE1621603A1 (de) * 1965-02-24 1971-06-24 Kovofinish N P Verfahren zur kontinuierlichen Oberflaechenbehandlung- und Anordnung zum Durchfuehren dieses Verfahrens
EP0050036A1 (fr) * 1980-10-14 1982-04-21 Paromec Engineering Limited Nettoyage de matériaux de forme allongée et appareil pour l'éxécuter
WO1988001657A1 (fr) * 1986-08-29 1988-03-10 Mannesmann Ag Installation pour le traitement de surface de feuillards defilant en continu, notamment installation de decapage
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
JPH0248086A (ja) * 1988-08-10 1990-02-16 Atsugi Unisia Corp 洗浄装置
DE4108516A1 (de) * 1990-03-16 1991-09-19 Hitachi Ltd Hochgeschwindigkeits-beizvorrichtung und hochgeschwindigkeits-beizverfahren
DE4031234A1 (de) * 1990-10-04 1992-04-09 Gewerk Keramchemie Verfahren und vorrichtung zur oberflaechenbehandlung von bandfoermigem behandlungsgut

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Title
CHEMICAL ABSTRACTS, vol. 110, no. 9, 1 May 1989, Columbus, Ohio, US; abstract no. 158879t, BAN: "Process and apparatus for uniform etching of titanium strip" page 294; XP000019417 *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 211 (C - 0715) 2 May 1990 (1990-05-02) *

Also Published As

Publication number Publication date
US5716455A (en) 1998-02-10
AU704013B2 (en) 1999-04-01
KR960014409A (ko) 1996-05-22
RU2168562C2 (ru) 2001-06-10
DE59506218D1 (de) 1999-07-22
AU3426995A (en) 1996-05-02
KR100359322B1 (ko) 2003-10-22
AT404601B (de) 1999-01-25
EP0708186B1 (fr) 1999-06-16
ATA195194A (de) 1998-05-15
TW309543B (fr) 1997-07-01
FI954903A0 (fi) 1995-10-16
FI954903A (fi) 1996-04-18

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