WO1998032899A1 - Procede et dispositif de decalaminage chimique en continu d'une bande metallique - Google Patents

Procede et dispositif de decalaminage chimique en continu d'une bande metallique Download PDF

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Publication number
WO1998032899A1
WO1998032899A1 PCT/EP1998/000323 EP9800323W WO9832899A1 WO 1998032899 A1 WO1998032899 A1 WO 1998032899A1 EP 9800323 W EP9800323 W EP 9800323W WO 9832899 A1 WO9832899 A1 WO 9832899A1
Authority
WO
WIPO (PCT)
Prior art keywords
strip
pickling
liquid nozzles
nozzles
running direction
Prior art date
Application number
PCT/EP1998/000323
Other languages
German (de)
English (en)
Inventor
Bernd Berger
Jörg WITTE
Original Assignee
Sundwig Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sundwig Gmbh filed Critical Sundwig Gmbh
Priority to AT98904112T priority Critical patent/ATE226984T1/de
Priority to JP53157198A priority patent/JP2001508833A/ja
Priority to DE59806113T priority patent/DE59806113D1/de
Priority to EP98904112A priority patent/EP0961842B1/fr
Publication of WO1998032899A1 publication Critical patent/WO1998032899A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
    • C25F1/02—Pickling; Descaling
    • C25F1/04—Pickling; Descaling in solution
    • 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
    • C23G3/023—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by spraying
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating

Definitions

  • the invention relates to an apparatus and a method for the continuous chemical descaling of metal strip in a pickling tank through which the metal strip runs.
  • Pickling speed can be influenced both via the composition of the pickling agent and via its temperature. It is also known that
  • a pickling device is known from DD 266 813 A5, in which the strip runs in the longitudinal direction through a horizontally arranged closed treatment channel, which is arranged inside a container which encloses the treatment channel and is closed by a lid, into which the treatment channel is supplied on the inlet or outlet side Treatment medium can be derived.
  • a separate treatment channel is arranged, to which the treatment medium is supplied via nozzle bars arranged on the inlet and outlet sides and associated pumps.
  • the pump output required for the pickling intensity that can be achieved is also relatively high here.
  • Treated treatment liquid filled treatment container and the treatment liquid is conveyed via pipes and at least one pump-around container in the circuit.
  • the treatment liquid is conveyed below the liquid level in the treatment tank by means of jet nozzles above and below the metal strip, directed in opposite directions from both longitudinal sides at an acute angle against the metal strip.
  • increasing the pickling intensity requires a relatively high pump output.
  • DE 29 11 701 AI discloses a method and an apparatus for the treatment of material webs in a treatment chamber.
  • successive, turbulent flows of a gaseous or liquid treatment medium are directed onto the two material web surfaces under pressure at an acute angle and in the opposite direction to the path of the web, in such a way that the web is treated and at the same time through the medium bed that is formed in an approximately horizontal path the treatment chamber is guided.
  • the known device has at least one upper and one lower row of treatment nozzles, which are elongated in a direction perpendicular to the direction of travel of the material web are trained.
  • Each of the nozzles has a longitudinal slot pointing to the continuous material web, the length of which is at least equal to the width of the material web, the nozzles being designed to move a turbulent medium stream from the slots onto the material web at an acute angle and in a direction opposite to the direction of flow Steer material web.
  • a method for pickling metal strip in which the metal strip is passed through a treatment room with at least one inlet and outlet for the treatment medium circulated through the treatment room, the treatment medium under pressure in the form of a directed and Treatment room filling flow and thereby the pressure and speed of the treatment medium are changed.
  • the pressure at the inlet point or inlet points is set between 2 and 10 bar and the flow velocity at the outlet point is kept between 10 and 30 m / s.
  • a device for carrying out the method is described, which is characterized in that its outlet opening is provided in the form of a circumferential gap provided in the side walls of the treatment room at the level of the metal strip, which also serves as an introduction and discharge opening for the metal band serves.
  • the object of the invention is to develop a device and a method with which the pickling intensity can be increased with comparatively low pumping powers.
  • the pool has a lower and an upper group of full jet nozzles trained, perpendicular to the belt liquid nozzles for the stain, the pressure and nozzle diameter are so matched to their distance from the surface of the loaded metal strip that around the point of impact of the respective impact jet of the individual liquid nozzles, an area with shooting flow is created.
  • the pickling tank can be filled with pickling liquid so that the strip to be pickled is drawn through the pickling liquid.
  • the impact jets penetrate the liquid surrounding the belt. The shooting flow is formed 'on the tape then in each case under the covering them liquid layer of the stain.
  • the liquid nozzles are preferably formed in the bottom and lid of the pickling tank.
  • the liquid nozzles can be formed in the electrodes, the tubular electrodes serve as a lead for the pickle to the liquid nozzles.
  • the liquid nozzles can be formed in tubular strips arranged in the spaces between the electrodes, via which the pickling can be fed to the liquid nozzles.
  • the liquid nozzles are preferably arranged regularly, in particular in a plurality of rows lying one behind the other and running transversely from row to row to the tape running direction, the liquid nozzles of successive rows being offset transversely to the tape running direction.
  • the transverse displacement of the liquid nozzles in rows one behind the other is in particular half a pitch of adjacent impact jets. In this way, with sufficient mutual spacing of the nozzles to form the shooting flow of the impingement jets, the strip can be applied uniformly over its entire width with pickling.
  • the rows lying one behind the other in the strip running direction should form outflow channels leading to the strip edges.
  • the outflow of the stain in these channels can be favored in that a supporting flow is generated from the belt edges by means of nozzles assigned to the outflow channels.
  • liquid nozzles can be switched on and off individually or in groups.
  • the invention is explained in more detail below with the aid of a drawing showing exemplary embodiments. Show in detail
  • 1 is a pickling tank in cross section perpendicular to the direction of strip travel
  • FIG. 7 shows a partial section of a pickling basin in a different embodiment from FIG. 1 in vertical section in the strip running direction with tubular electrodes arranged on the top and bottom.
  • FIG. 8 shows a pair of electrodes in section X of FIG. 7 in cross section transverse to the direction of tape travel
  • FIGS. 7 and 8 show an electrode according to FIGS. 7 and 8 in an enlarged view
  • Fig. 10 shows a partial section of a pickling basin in a different embodiment to Fig. 1 and 7 in vertical section in the tape running direction with plate-shaped electrodes.
  • a belt 1 runs through a pickling tank 2 with a bottom 2a and a lid 2b. Both in the bottom 2a and in the lid 2b there are liquid nozzles 3a, 3b which are directed towards the band 1 Beam direction formed. The nozzles 3a, 3b are fed with pickling via feed lines 3c, 3d.
  • the pickling tank 2 is not necessarily but preferably filled with pickling liquid to such an extent that the strip 1 is immersed therein. By immersing the strip 1 in the pickling liquid, the pickling effect on the top and bottom of the strip 1 is evened out.
  • Each of the nozzles 3a, 3b is designed as a full jet nozzle according to FIG. 2.
  • a stagnation zone SZ is formed, from which a shooting flow SS radially emerges, for which it is characteristic that a wave W forms at the end.
  • the pressure with which the nozzle 3a, 3b is acted upon, its outlet diameter, its distance from the surface of the strip 1 and the thickness of the pressure which is established on the surface are essential for the formation of the shooting flow SS
  • Liquid layer The thicker the liquid layer, the greater the pressure and / or the nozzle cross section and / or the smaller the distance.
  • FIGS. 3 to 5 show different geometrical arrangements of the individual liquid nozzles. All versions have in common that the nozzles are arranged in rows one behind the other, the areas of the flowing flow SS of the nozzles of each row overlapping one another.
  • the center points of the nozzles of each row lie on a line perpendicular to the tape running direction R and are offset from row to row by half a pitch of adjacent nozzles
  • the centers of successive nozzles on a line slightly inclined to the direction of strip travel R.
  • the centers of the juxtaposed nozzles are also on a line that is inclined to the tape running direction.
  • the inclination of the center line of successive nozzles to the tape running direction results in a geometrical displacement of the nozzles from row to row in the tape running direction and thus a more uniform distribution of the impact jets of the tape surface.
  • FIG. 3 the center points of the nozzles of each row lie on a line perpendicular to the tape running direction R and are offset from row to row by half a pitch of adjacent nozzles
  • the centers of successive nozzles on a line slightly inclined to the direction of strip travel R.
  • the centers of the juxtaposed nozzles are also on a line that is inclined to the tape running direction.
  • the centers of the nozzles of rows lying one behind the other are offset by half a pitch of adjacent rows.
  • the lines on which the center points of the nozzles of every second row lying one behind the other can be slightly inclined to the tape running direction R.
  • an outflow channel A is left between the individual rows of nozzles for the pickling agent drain to the strip edges, as is indicated by the arrows between the rows of nozzles.
  • the outflow channels A are provided on the side next to the belt 1, and nozzles which promote the outflow of pickling agent and drive pickling agent into the outflow channels A.
  • FIGS. 7 to 9 In the exemplary embodiment of FIGS. 7 to 9, above and below the belt 1, transverse to the belt running direction and at a distance from one of the tubular electrodes EL in the belt running direction, in which nozzle openings 3a are indicated by arrows (FIG. 8) or specifically (FIG. 9) , 3b are formed.
  • the pickling is fed to the nozzle openings 3a, 3b via the tubular electrodes EL.
  • electrodes E are arranged in the pickling tank 2 above and below the strip 1 at a distance from one another in the strip running direction.
  • tubular strips L In the spaces between electrodes E, tubular strips L are arranged, in which nozzle openings 3a, 3b are indicated by arrows, to which the stain is fed via the tubular strips L.
  • the nozzle openings 3a, 3b, via which the impact jets act on the belt 1, can be accommodated in a space-saving manner.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

L'invention concerne un procédé et un dispositif de décalaminage chimique en continu d'une bande métallique dans un bain de décapant. Une pluralité de jets de décapant (4) sont appliqués sur la surface à décalaminer de la bande (1), perpendiculairement à celle-ci, et forment un courant jaillissant SS autour de leur point d'impact dans la cuve de décapage (2).
PCT/EP1998/000323 1997-01-25 1998-01-22 Procede et dispositif de decalaminage chimique en continu d'une bande metallique WO1998032899A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT98904112T ATE226984T1 (de) 1997-01-25 1998-01-22 Vorrichtung und verfahren zum kontinuierlichen chemischen entzundern von metallband
JP53157198A JP2001508833A (ja) 1997-01-25 1998-01-22 金属製ストリップの連続的化学的スケール除法装置および方法
DE59806113T DE59806113D1 (de) 1997-01-25 1998-01-22 Vorrichtung und verfahren zum kontinuierlichen chemischen entzundern von metallband
EP98904112A EP0961842B1 (fr) 1997-01-25 1998-01-22 Procede et dispositif de decalaminage chimique en continu d'une bande metallique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19702639A DE19702639C1 (de) 1997-01-25 1997-01-25 Vorrichtung und Verfahren zum kontinuierlichen chemischen Entzundern von Metallband
DE19702639.7 1997-01-25

Publications (1)

Publication Number Publication Date
WO1998032899A1 true WO1998032899A1 (fr) 1998-07-30

Family

ID=7818327

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/000323 WO1998032899A1 (fr) 1997-01-25 1998-01-22 Procede et dispositif de decalaminage chimique en continu d'une bande metallique

Country Status (6)

Country Link
EP (1) EP0961842B1 (fr)
JP (1) JP2001508833A (fr)
AT (1) ATE226984T1 (fr)
DE (2) DE19702639C1 (fr)
ES (1) ES2186125T3 (fr)
WO (1) WO1998032899A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19947857A1 (de) * 1999-10-05 2001-05-03 Thyssenkrupp Stahl Ag Beizanlage für Metallbänder

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56127799A (en) * 1980-03-07 1981-10-06 Nippon Steel Corp Insoluble electrode pad
JPS6230892A (ja) * 1985-07-31 1987-02-09 Sumitomo Special Metals Co Ltd 長尺金属板の連続洗浄方法
EP0513631A1 (fr) * 1991-05-16 1992-11-19 SUNDWIGER EISENHÜTTE MASCHINENFABRIK GmbH & CO. Dispositif pour le refroidissement d'un produit plat, en particulier d'une bande métallique
DE4425854C1 (de) * 1994-07-07 1995-11-09 Mannesmann Ag Elektrolytisches Oberflächenbehandlungsverfahren und Anlage zur Durchführung des Verfahrens
EP0692314A2 (fr) * 1994-06-16 1996-01-17 Sms Schloemann-Siemag Aktiengesellschaft Procédé et dispositif intensification du contact entre une bande laminée et un fluide

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2031036B (en) * 1978-10-10 1982-11-03 Midland Ross Corp Liquid trestment of metal strip
DE3629894A1 (de) * 1986-08-29 1988-03-03 Mannesmann Ag Anlage zur oberflaechenbehandlung von kontinuierlich durchlaufenden baendern, insbesondere beizanlage
DE4031234C2 (de) * 1990-10-04 1994-02-03 Gewerk Keramchemie Verfahren und Vorrichtung zur Oberflächenbehandlung von bandförmigem Behandlungsgut
AT399517B (de) * 1991-08-20 1995-05-26 Andritz Patentverwaltung Verfahren zur oberflächenbehandlung von im wesentlichen ebenem flächigem gut, insbes. zum beizen von metallband

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56127799A (en) * 1980-03-07 1981-10-06 Nippon Steel Corp Insoluble electrode pad
JPS6230892A (ja) * 1985-07-31 1987-02-09 Sumitomo Special Metals Co Ltd 長尺金属板の連続洗浄方法
EP0513631A1 (fr) * 1991-05-16 1992-11-19 SUNDWIGER EISENHÜTTE MASCHINENFABRIK GmbH & CO. Dispositif pour le refroidissement d'un produit plat, en particulier d'une bande métallique
EP0692314A2 (fr) * 1994-06-16 1996-01-17 Sms Schloemann-Siemag Aktiengesellschaft Procédé et dispositif intensification du contact entre une bande laminée et un fluide
DE4425854C1 (de) * 1994-07-07 1995-11-09 Mannesmann Ag Elektrolytisches Oberflächenbehandlungsverfahren und Anlage zur Durchführung des Verfahrens

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 003 (C - 086) 9 January 1982 (1982-01-09) *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 214 (C - 434) 10 July 1987 (1987-07-10) *

Also Published As

Publication number Publication date
DE19702639C1 (de) 1998-06-18
EP0961842B1 (fr) 2002-10-30
JP2001508833A (ja) 2001-07-03
ES2186125T3 (es) 2003-05-01
EP0961842A1 (fr) 1999-12-08
DE59806113D1 (de) 2002-12-05
ATE226984T1 (de) 2002-11-15

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