WO2004055240A1 - Method and device for stripping wires and/or metal strips - Google Patents

Method and device for stripping wires and/or metal strips Download PDF

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Publication number
WO2004055240A1
WO2004055240A1 PCT/BE2003/000225 BE0300225W WO2004055240A1 WO 2004055240 A1 WO2004055240 A1 WO 2004055240A1 BE 0300225 W BE0300225 W BE 0300225W WO 2004055240 A1 WO2004055240 A1 WO 2004055240A1
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WO
WIPO (PCT)
Prior art keywords
wire
turbulent
bath
travel
pickling
Prior art date
Application number
PCT/BE2003/000225
Other languages
French (fr)
Inventor
Jacques Henri Jules Bauden
Original Assignee
Le Four Industriel Belge
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 Le Four Industriel Belge filed Critical Le Four Industriel Belge
Priority to JP2004559500A priority Critical patent/JP2006510801A/en
Priority to EP03782022A priority patent/EP1579035A1/en
Priority to CA2510185A priority patent/CA2510185C/en
Priority to AU2003289775A priority patent/AU2003289775A1/en
Publication of WO2004055240A1 publication Critical patent/WO2004055240A1/en

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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
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/024—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by a combination of dipping and spraying
    • 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
    • C23G1/08—Iron or steel
    • 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
    • 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
    • C23G3/025—Details of the apparatus, e.g. linings or sealing means
    • C23G3/026—Details of the apparatus, e.g. linings or sealing means for guiding the objects

Definitions

  • the present invention relates to a process for pickling metallic wires and / or ribbons, comprising a running of at least one metallic wire and / or ribbon through a bath of pickling liquor, in a running direction, thus than to a device for implementing such a method.
  • the pickling liquor is an acid, in particular hydrochloric acid or sulfuric acid (see for example BE-A-1005217).
  • the object of the present invention is to improve the efficiency of a process for pickling wire and / or metal tape in a simple manner and with as little energy expenditure as possible.
  • This problem is solved according to the invention by a method as described at the start, further comprising a formation in the bath, by wire and / or metallic strip, of at least one turbulent stream of pickling liquor which flows in a direction transverse to said running direction, and
  • each wire and / or metallic strip During said scrolling, a passage of each wire and / or metallic strip through said at least one turbulent current which corresponds to it.
  • Each wire and / or ribbon passing through the bath is thus treated individually and the turbulent current which acts on it is directed transversely to the direction of travel, which decisively increases the degree of action of the pickling liquor.
  • each aforesaid turbulent current flows in said transverse direction in an ascending manner.
  • the turbulent currents act from bottom to top in the bath and all the wires during their movement pass easily through currents of the same intensity, since coming from a source located equidistant from the wires and / or ribbons.
  • each wire and / or metal strip passes through several of said turbulent currents, in succession.
  • each aforementioned current has a form of jet with rounded section which, above a level corresponding to the quiescent bath, forms a turbulent outgrowth of the geyser type.
  • Each wire and / or ribbon thus passes through a regular succession of small geysers, crossing not only the rising current of each of them, but also the intermediate turbulence caused by the fall of the pickling liquor from the top of each geyser towards the bath.
  • the method comprises, downstream and / or upstream of the pickling liquor bath, rinsing said at least one wire and / or metallic strip through several successive curtains of rinsing, which flow in a turbulent manner and through which said at least one wire and / or metallic strip passes.
  • the rinsing comprises a projection of said rinses of rinsing liquid according to a turbulent upward flow.
  • the successive curtains of rinsing liquid thus obtain excellent sealing of the pickling tank at the inlet and at the outlet.
  • the rinsing is perfect and adaptable according to needs, by reducing or increasing the number of curtains to pass through.
  • the invention also relates to a device for pickling metal wires and / or ribbons, comprising
  • this device further comprises means for forming, in the bath, at least one turbulent stream of pickling liquor by wire and / or metallic strip which flows in a direction transverse to said direction of travel.
  • these training means being arranged in the tank so that each wire and / or metal strip passes, during its travel, through said at least one turbulent current which corresponds to it.
  • Figure 1 shows a pickling installation according to the invention in a schematic view in longitudinal section.
  • FIG. 2 shows a top perspective view of a pickling tank according to the invention.
  • FIG. 1 there is shown a pickling device which comprises a tank 1 containing a bath of pickling liquor 2.
  • This pickling liquor generally consists of a dilute acid, for example hydrochloric or sulfuric acid.
  • aqueous solution of HCl at 17% (186 g / l).
  • FIG. 1 a sheet of steel wires 3 which run parallel and of which only one is visible in FIG. 1 is treated. These wires are set in motion by means of drive means. Scroll 4 and 5 known per se, and shown only schematically.
  • a box 6 is arranged in the pickling bath below the sheet of wires 3.
  • This box 6 has a cavity 7 which by a lower duct 8 is in communication with a pump 9, known per se, for example of the centrifugal type, which is immersed in the pickling bath 2.
  • This pump 9 is capable of sucking the pickling liquor from the bath 2 and of discharging it under pressure into the cavity 7 of the box 6.
  • the openings 11 are orifices of circular shape which are arranged at regular intervals below each of the wires of the sheet of wires.
  • the closure cover 10 has variable dimensions depending on the products to be stripped.
  • the openings 11 can be arranged in the same way for each wire or in staggered rows.
  • a pitch can be provided between the orifices, for example of the order of 50 ⁇ 38 mm, for a hole diameter of, for example, 7 mm.
  • the box is supported in the tank, in a manner not shown, so as to extend from the inlet 12 to the outlet 13 of the tank, below the sheet of wires 3 in movement.
  • a spillage interval remains between the casing 6 and the inlet 12 and respectively the outlet 13 so that the pickling liquor which reaches the edge of the casing can be poured into the bottom of the cuvé 1.
  • Support elements 14 hold the ply of wires at intervals so that they are constantly at a short distance from the closure cover of the box 6, while being constantly submerged by the pickling liquor exiting through the openings 11.
  • the pickling liquor is pumped into the box 6 from which it escapes through the orifices 11 under a pressure for example of 5000 l / h / m 2 of box surface.
  • the pickling liquor thus forms a succession of small geysers (see in particular Figure 2) which the wires to be pickled pass through, which makes it possible to obtain an excellent pickling efficiency for a low energy expenditure.
  • a wire rinsing tank can be provided upstream and / or downstream of the pickling tank 1, a wire rinsing tank can be provided.
  • a rinsing tank 15 disposed downstream of the pickling tank a tank arranged symmetrically upstream can also be provided.
  • the rinsing tank 15 contains rinsing water.
  • the water can be supplied by an inlet 16 and be discharged by an overflow 17.
  • the latter can be in communication with a lower inlet 18 so as to put the rinsing water into circulation.
  • the tank 15 comprises, in the illustrated embodiment, means for projecting rising water curtains.
  • These comprise air supply ducts 19 to 21 arranged at the bottom of the tank parallel to one another and transversely to the direction of travel of the wires and / or ribbons.
  • Each of these conduits is connected, independently closable, to a source of pressurized air, not shown.
  • the conduits 19 to 21 are perforated and therefore supply pressurized air bubbles in the water in the tank.
  • two guide plates 22 and 23 are supported by the longitudinal walls of the tank so as to pass through it from one side. At their upper end, located above the water level, the guide plates are not far apart and thus form a thin outlet slot.
  • the guide plates 22 and 23 have a spacing clearly greater than that presented at their top.
  • the guide plates thus form a kind of roof between the two sides of which the bubbles are forcedly guided upwards.
  • a pressure of the order of 1000 mm of H 2 O (9806 Pa) for example the air bubbles entrain the water of the tank during their ascent and expel a curtain of turbulent water 24 upwards.
  • the top of the water curtain it can be split in two and form two turbulent waterfalls 25 and 26 that the rinsing wire must also pass through.
  • the pairs of guide plates 22, 23 can be arranged sufficiently tightly in their succession to that the waterfalls of two neighboring curtains can cross. In this way, the thread runs continuously in water, over a curtain width generally greater than 15 cm. This allows the stripping tank to be completely sealed against an acid outlet. In certain cases, it is possible to envisage a cover 27 which closes the tank upwards and which advantageously has deflectors 28 to orient the direction of the waterfalls 25 and 26.
  • the orifices in the box have an elongated shape, which in horizontal projection has a longitudinal axis superimposed on the direction of travel of the corresponding wire or ribbon.
  • the orifices in the box have an elongated shape, which in horizontal projection has a longitudinal axis superimposed on the direction of travel of the corresponding wire or ribbon.

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  • 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)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

The invention concerns a method for stripping wires and/or metal strips, comprising unwinding at least one wire or tape through a pickle liquor bath, along an unwinding direction. The invention is characterized in that it further comprises forming in the bath, per wire and/or metal strip, at least one pickle liquor turbulent current which flows along a direction transverse to said unwinding direction, and during said unwinding, passing each wire and/or metal strip through said at least one turbulent current which corresponds thereto. The invention also concerns a device for implementing said method.

Description

"Procédé et dispositif de décapage de fils et/ou rubans métalliques" "Method and device for pickling metal wires and / or ribbons"
La présente invention est relative à un procédé de décapage de fils et/ou rubans métalliques, comprenant un défilement d'au moins un fil et/ou ruban métallique au travers d'un bain de liqueur de décapage, suivant une direction de défilement, ainsi qu'à un dispositif pour la mise en oeuvre d'un tel procédé.The present invention relates to a process for pickling metallic wires and / or ribbons, comprising a running of at least one metallic wire and / or ribbon through a bath of pickling liquor, in a running direction, thus than to a device for implementing such a method.
On connaît depuis longtemps de tels procédés et dispositifs, en particulier dans lesquels la liqueur de décapage est un acide, notamment de l'acide chlor ydrique ou de l'acide sulfurique (voir par exemple BE-A-1005217).Such processes and devices have been known for a long time, in particular in which the pickling liquor is an acid, in particular hydrochloric acid or sulfuric acid (see for example BE-A-1005217).
Pour améliorer l'efficacité du bain acide, on a déjà prévu d'introduire dans le bain un choc hydraulique provoquant en surface une vague dirigée à contre-courant du défilement des fils métalliques (voir Ph. P. Cowie et al., Fumeless Acid Wave Pickle, in Wire & Cable Technology International, July 20O1 , p. 58-59; US-A-4.950.333 et US-A- 4.951.694). L'efficacité d'un tel décapage reste toutefois insatisfaisante car la puissance de la vague s'amenuise au fur et à mesure de sa progression ce qui donne lieu à un décapage peu régulier. D'autre part, la vague s'étend sur toute la largeur de la cuve, c'est-à-dire avec une déperdition d'énergie là où elle ne rencontre aucun objet à décaper.To improve the efficiency of the acid bath, provision has already been made to introduce a hydraulic shock into the bath, causing a surface wave directed against the flow of the metal wires (see Ph. P. Cowie et al., Fumeless Acid Wave Pickle, in Wire & Cable Technology International, July 20O1, p. 58-59; US-A-4.950.333 and US-A- 4.951.694). The effectiveness of such a stripping remains unsatisfactory, however, because the power of the wave diminishes as it progresses, which gives rise to an irregular stripping. On the other hand, the wave extends over the entire width of the tank, that is to say with a loss of energy where it does not meet any object to be stripped.
La présente invention a pour but d'améliorer l'efficacité d'un procédé de décapage de fil et/ou ruban métallique d'une manière simple et avec une dépense d'énergie aussi faible que possible. On résout ce problème suivant l'invention par un procédé tel que décrit au début, comprenant en outre - une formation dans le bain, par fil et/ou ruban métallique, d'au moins un courant turbulent de liqueur de décapage qui s'écoule suivant une direction transversale à ladite direction de défilement, etThe object of the present invention is to improve the efficiency of a process for pickling wire and / or metal tape in a simple manner and with as little energy expenditure as possible. This problem is solved according to the invention by a method as described at the start, further comprising a formation in the bath, by wire and / or metallic strip, of at least one turbulent stream of pickling liquor which flows in a direction transverse to said running direction, and
- pendant ledit défilement, un passage de chaque fil et/ou ruban métallique au travers dudit au moins un courant turbulent qui lui correspond. Chaque fil et/ou ruban passant dans le bain est ainsi traité individuellement et le courant turbulent qui agit sur lui est dirigé transversalement à la direction de défilement ce qui augmente de manière décisive le degré d'action de la liqueur de décapage.- During said scrolling, a passage of each wire and / or metallic strip through said at least one turbulent current which corresponds to it. Each wire and / or ribbon passing through the bath is thus treated individually and the turbulent current which acts on it is directed transversely to the direction of travel, which decisively increases the degree of action of the pickling liquor.
Suivant une forme de réalisation de l'invention chaque courant turbulent susdit s'écoule suivant ladite direction transversale de manière ascensionnelle. Ainsi, les courants turbulents agissent de bas en haut dans le bain et tous les fils pendant leur défilement passent aisément par des courants de même intensité, car provenant d'une source située à équidistance des fils et/ou rubans.According to an embodiment of the invention each aforesaid turbulent current flows in said transverse direction in an ascending manner. Thus, the turbulent currents act from bottom to top in the bath and all the wires during their movement pass easily through currents of the same intensity, since coming from a source located equidistant from the wires and / or ribbons.
Suivant une forme de réalisation préférentielle de l'invention, pendant ledit défilement, chaque fil et/ou ruban métallique passe au travers de plusieurs desdits courants turbulents, en succession. Avantageusement, chaque courant susdit a une forme de jet à section arrondie qui, au-dessus d'un niveau correspondant au bain de repos, forme une excroissance turbulente de type geyser. Chaque fil et/ou ruban passe ainsi en travers d'une succession régulière de petits geysers en traversant non seulement le courant ascensionnel de chacun d'eux, mais aussi la turbulence intermédiaire provoquée par la retombée de la liqueur de décapage depuis le sommet de chaque geyser vers le bain.According to a preferred embodiment of the invention, during said scrolling, each wire and / or metal strip passes through several of said turbulent currents, in succession. Advantageously, each aforementioned current has a form of jet with rounded section which, above a level corresponding to the quiescent bath, forms a turbulent outgrowth of the geyser type. Each wire and / or ribbon thus passes through a regular succession of small geysers, crossing not only the rising current of each of them, but also the intermediate turbulence caused by the fall of the pickling liquor from the top of each geyser towards the bath.
Suivant une forme perfectionnée de réalisation de l'invention, le procédé comprend, en aval et/ou en amont du bain de liqueur de décapage, un rinçage dudit au moins un fil et/ou ruban métallique au travers de plusieurs rideaux successifs de liquide de rinçage, qui s'écoulent de manière turbulente et au travers desquels défile ledit au moins un fil et/ou ruban métallique. D'une manière tout à fait avantageuse, le rinçage comprend une projection desdits rideaux de liquide de rinçage suivant un écoulement turbulent ascensionnel. On obtient ainsi par les rideaux successifs de liquide de rinçage, une excellente étanchéification de la cuve de décapage à l'entrée et à la sortie. Le rinçage est parfait et adaptable en fonction des besoins, par diminution ou augmentation du nombre de rideaux à faire traverser. Dans le cas où la formation des geysers de liquide de rinçage sont obtenus par des bulles de gaz sous pression guidées, comme il sera décrit plus en détail ci-après, on peut même se passer de pompes à liquide dans les cuves de rinçage, ce qui représente une grande économie d'énergie.According to an improved embodiment of the invention, the method comprises, downstream and / or upstream of the pickling liquor bath, rinsing said at least one wire and / or metallic strip through several successive curtains of rinsing, which flow in a turbulent manner and through which said at least one wire and / or metallic strip passes. In an entirely advantageous manner, the rinsing comprises a projection of said rinses of rinsing liquid according to a turbulent upward flow. The successive curtains of rinsing liquid thus obtain excellent sealing of the pickling tank at the inlet and at the outlet. The rinsing is perfect and adaptable according to needs, by reducing or increasing the number of curtains to pass through. In the case where the formation of the rinsing liquid geysers is obtained by guided gas bubbles under pressure, as will be described in more detail below, it is even possible to dispense with liquid pumps in the rinsing tanks, this which represents a great energy saving.
D'autres détails concernant le procédé suivant l'invention sont indiqués dans les revendications 1 à 9.Other details concerning the process according to the invention are indicated in claims 1 to 9.
L'invention concerne également un dispositif de décapage de fils et/ou rubans métalliques, comprenantThe invention also relates to a device for pickling metal wires and / or ribbons, comprising
- des moyens d'entraînement en défilement d'au moins un fil et/ou ruban métallique, etmeans for driving the scrolling of at least one wire and / or metallic strip, and
- une cuve contenant un bain de liqueur de décapage que traverse ledit au moins un fil et/ou ruban métallique suivant une direction de défilement.- A tank containing a bath of pickling liquor through which said at least one wire and / or metal strip in a direction of travel.
Suivant l'invention, ce dispositif comprend en outre des moyens de formation, dans le bain, d'au moins un courant turbulent de liqueur de décapage par fil et/ou ruban métallique qui s'écoule suivant une direction transversale à ladite direction de défilement, ces moyens de formation étant agencés dans la cuve de façon que chaque fil et/ou ruban métallique passe, pendant son défilement, au travers dudit au moins un courant turbulent qui lui correspond.According to the invention, this device further comprises means for forming, in the bath, at least one turbulent stream of pickling liquor by wire and / or metallic strip which flows in a direction transverse to said direction of travel. , these training means being arranged in the tank so that each wire and / or metal strip passes, during its travel, through said at least one turbulent current which corresponds to it.
D'autres détails concernant le dispositif suivant l'invention sont indiqués dans les revendications 10 à 17. D'autres détails et particularités de l'invention ressortiront de la description donnée ci-après, à titre non limitatif et avec référence aux dessins annexés.Other details concerning the device according to the invention are indicated in claims 10 to 17. Other details and particularities of the invention will emerge from the description given below, without implied limitation and with reference to the attached drawings.
La figure 1 représente une installation de décapage suivant l'invention dans une vue schématique en coupe longitudinale.Figure 1 shows a pickling installation according to the invention in a schematic view in longitudinal section.
La figure 2 représente une vue de haut en perspective d'une cuve de décapage suivant l'invention.2 shows a top perspective view of a pickling tank according to the invention.
Sur les différents dessins, les éléments identiques ou analogues sont désignés par les mêmes références. Sur la figure 1 on a représenté un dispositif de décapage qui comprend une cuve 1 contenant un bain de liqueur de décapage 2. Cette liqueur de décapage consiste d'une manière générale en un acide dilué, par exemple de l'acide chlorhydrique ou sulfurique. Dans l'exemple représenté, on fait usage d'une solution aqueuse de HCI à 17 % (186 g/l).In the various drawings, identical or analogous elements are designated by the same references. In Figure 1 there is shown a pickling device which comprises a tank 1 containing a bath of pickling liquor 2. This pickling liquor generally consists of a dilute acid, for example hydrochloric or sulfuric acid. In the example shown, use is made of an aqueous solution of HCl at 17% (186 g / l).
Dans l'exemple représenté sur la figure 1 , on traite une nappe de fils d'acier 3 qui défilent parallèlement et dont un seul est visible sur la figure 1. Ces fils sont mis en mouvement à l'aide de moyens d'entraînement en défilement 4 et 5 connus en soi, et représentés uniquement de manière schématisée.In the example shown in FIG. 1, a sheet of steel wires 3 which run parallel and of which only one is visible in FIG. 1 is treated. These wires are set in motion by means of drive means. scroll 4 and 5 known per se, and shown only schematically.
Dans l'exemple illustré, un caisson 6 est agencé dans le bain de décapage en dessous de la nappe de fils 3. Ce caisson 6 présente une cavité 7 qui par un conduit inférieur 8 est en communication avec une pompe 9, connue en soi, par exemple de type centrifuge, qui est immergée dans le bain de décapage 2. Cette pompe 9 est capable d'aspirer la liqueur de décapage du bain 2 et de la refouler sous pression dans la cavité 7 du caisson 6.In the example illustrated, a box 6 is arranged in the pickling bath below the sheet of wires 3. This box 6 has a cavity 7 which by a lower duct 8 is in communication with a pump 9, known per se, for example of the centrifugal type, which is immersed in the pickling bath 2. This pump 9 is capable of sucking the pickling liquor from the bath 2 and of discharging it under pressure into the cavity 7 of the box 6.
Le côté du caisson 6, faisant face à la nappe de fils 3, forme un couvercle de fermeture 10 qui présente des ouvertures 11 par lesquelles s'écoulent des courants turbulents ascensionnels 29 de liqueur de décapage. Dans l'exemple illustré, les ouvertures 11 sont des orifices de forme circulaire qui sont disposés à intervalles réguliers en dessous de chacun des fils de la nappe de fils.The side of the box 6, facing the ply of wires 3, forms a closure cover 10 which has openings 11 through which flow upward turbulent currents 29 of pickling liquor. In the example illustrated, the openings 11 are orifices of circular shape which are arranged at regular intervals below each of the wires of the sheet of wires.
Le couvercle de fermeture 10 présente des dimensions variables en fonction des produits à décaper. Sur cette plaque les ouvertures 11 peuvent être disposés de la même manière pour chaque fil ou en quinconce. On peut prévoir entre les orifices un pas par exemple de l'ordre de 50 x 38 mm, pour un diamètre de trou de par exemple 7 mm.The closure cover 10 has variable dimensions depending on the products to be stripped. On this plate, the openings 11 can be arranged in the same way for each wire or in staggered rows. A pitch can be provided between the orifices, for example of the order of 50 × 38 mm, for a hole diameter of, for example, 7 mm.
Le caisson est supporté dans la cuve, d'une manière non représentée, de façon à s'étendre de l'entrée 12 à la sortie 13 de la cuve, en dessous de la nappe de fils 3 en défilement. Toutefois, dans l'exemple illustré, un intervalle de déversement subsiste entre le caisson 6 et l'entrée 12 et respectivement la sortie 13 de façon que la liqueur de décapage parvenue au bord du caisson puisse se déverser dans le fond de la cuvé 1.The box is supported in the tank, in a manner not shown, so as to extend from the inlet 12 to the outlet 13 of the tank, below the sheet of wires 3 in movement. However, in the example illustrated, a spillage interval remains between the casing 6 and the inlet 12 and respectively the outlet 13 so that the pickling liquor which reaches the edge of the casing can be poured into the bottom of the cuvé 1.
Des éléments d'appui 14 maintiennent à intervalles la nappe de fils de façon que ceux-ci soient constamment à petite distance du couvercle de fermeture du caisson 6, tout en étant constamment submergés par la liqueur de décapage sortant par les ouvertures 11. Lorsque la pompe 9 est mise en oeuvre la liqueur de décapage est pompée dans le caisson 6 d'où elle s'échappe par les orifices 11 sous une pression par exemple de 5000 l/h/m2 de surface de caisson. La liqueur de décapage forme ainsi une succession de petits geysers (v. en particulier figure 2) que traversent les fils à décaper, ce qui permet d'obtenir une efficacité de décapage excellente pour une faible dépense d'énergie.Support elements 14 hold the ply of wires at intervals so that they are constantly at a short distance from the closure cover of the box 6, while being constantly submerged by the pickling liquor exiting through the openings 11. When the pump 9 is implemented the pickling liquor is pumped into the box 6 from which it escapes through the orifices 11 under a pressure for example of 5000 l / h / m 2 of box surface. The pickling liquor thus forms a succession of small geysers (see in particular Figure 2) which the wires to be pickled pass through, which makes it possible to obtain an excellent pickling efficiency for a low energy expenditure.
En amont et/ou en aval de la cuve de décapage 1 , on peut prévoir une cuve de rinçage des fils. Dans l'exemple illustré, on a uniquement représenté une cuve de rinçage 15 disposée en aval de la cuve de décapage, une cuve agencée symétriquement en amont pouvant aussi être prévue. Dans l'exemple illustré, la cuve de rinçage 15 contient de l'eau de rinçage. L'eau peut être alimentée par une entrée 16 et être évacuée par un trop-plein 17. Celui-ci peut être en communication avec une entrée inférieure 18 de manière à mettre l'eau de rinçage en circulation.Upstream and / or downstream of the pickling tank 1, a wire rinsing tank can be provided. In the example illustrated, there is only shown a rinsing tank 15 disposed downstream of the pickling tank, a tank arranged symmetrically upstream can also be provided. In the example illustrated, the rinsing tank 15 contains rinsing water. The water can be supplied by an inlet 16 and be discharged by an overflow 17. The latter can be in communication with a lower inlet 18 so as to put the rinsing water into circulation.
La cuve 15 comprend, dans l'exemple de réalisation illustré, des moyens de projection de rideaux d'eau ascensionnels. Ceux-ci comprennent des conduits d'alimentation à air 19 à 21 disposés au fond de la cuve parallèlement l'un à l'autre et transversalement au sens de défilement des fils et/ou rubans. Chacun de ces conduits est relié, de manière indépendamment obturable, à une source d'air sous pression, non représentée. Les conduits 19 à 21 sont perforés et alimentent donc, dans l'eau de la cuve, des bulles d'air sous pression. Par-dessus chaque conduit 19 à 21 , deux plaques de guidage 22 et 23 sont supportées par les parois longitudinales de la cuve de manière à traverser celle-ci de part en part. A leur extrémité haute, située au-dessus du niveau d'eau, les plaques de guidage sont peu écartées et forment ainsi une mince fente de sortie. A leur extrémité basse, située un peu plus bas que leur conduit d'alimentation à air, les plaques de guidage 22 et 23 présentent un écartement nettement supérieur à celui présenté à leur sommet. Les plaques de guidage forment ainsi une espèce de toiture entre les deux pans de laquelle les bulles sont guidées de manière forcée vers le haut. Avec une pression d'air uniquement légèrement supérieure à la colonne d'eau, dans le cas illustré une pression de l'ordre de 1000 mm de H2O (9806 Pa) par exemple, les bulles d'air entraînent l'eau de la cuve pendant leur ascension et expulsent un rideau d'eau turbulent 24 vers le haut. Au sommet du rideau d'eau, il peut se partager en deux et former deux chutes d'eau turbulentes 25 et 26 que le fil à rincer doit aussi traverser. Les paires de plaques de guidage 22, 23 peuvent être agencées de manière suffisamment serrée dans leur succession pour que les chutes d'eau de deux rideaux voisins puissent se croiser. De cette manière, le fil défile en continu dans de l'eau, sur une largeur de rideau généralement supérieure à 15 cm. Ce qui permet d'étanchéifier complètement la cuve de décapage vis-à-vis d'une sortie d'acide. On peut envisager dans certains cas, un couvercle 27 qui ferme la cuve vers le haut et qui avantageusement présente des déflecteurs 28 pour orienter la direction des chutes d'eau 25 et 26.The tank 15 comprises, in the illustrated embodiment, means for projecting rising water curtains. These comprise air supply ducts 19 to 21 arranged at the bottom of the tank parallel to one another and transversely to the direction of travel of the wires and / or ribbons. Each of these conduits is connected, independently closable, to a source of pressurized air, not shown. The conduits 19 to 21 are perforated and therefore supply pressurized air bubbles in the water in the tank. Over each conduit 19 to 21, two guide plates 22 and 23 are supported by the longitudinal walls of the tank so as to pass through it from one side. At their upper end, located above the water level, the guide plates are not far apart and thus form a thin outlet slot. At their lower end, located a little lower than their air supply duct, the guide plates 22 and 23 have a spacing clearly greater than that presented at their top. The guide plates thus form a kind of roof between the two sides of which the bubbles are forcedly guided upwards. With an air pressure only slightly higher than the water column, in the illustrated case a pressure of the order of 1000 mm of H 2 O (9806 Pa) for example, the air bubbles entrain the water of the tank during their ascent and expel a curtain of turbulent water 24 upwards. At the top of the water curtain, it can be split in two and form two turbulent waterfalls 25 and 26 that the rinsing wire must also pass through. The pairs of guide plates 22, 23 can be arranged sufficiently tightly in their succession to that the waterfalls of two neighboring curtains can cross. In this way, the thread runs continuously in water, over a curtain width generally greater than 15 cm. This allows the stripping tank to be completely sealed against an acid outlet. In certain cases, it is possible to envisage a cover 27 which closes the tank upwards and which advantageously has deflectors 28 to orient the direction of the waterfalls 25 and 26.
On obtient ainsi un rinçage efficace, sans pompage de liquide, et sans nécessiter de cascades. II doit être entendu que la présente invention n'est en aucune façon limitée aux formes de réalisation décrites ci-dessus, mais que bien des modifications peuvent y être apportées sans sortir du cadre des revendications annexées.An effective rinsing is thus obtained, without pumping liquid, and without requiring waterfalls. It should be understood that the present invention is in no way limited to the embodiments described above, but that many modifications can be made thereto without departing from the scope of the appended claims.
On peut par exemple prévoir que les orifices dans le caisson aient une forme allongée, qui en projection horizontale présente un axe longitudinal superposé à la direction de défilement du fil ou ruban correspondant. On peut même envisager qu'il n'y ait qu'un seul orifice allongé pour chaque fil, cet orifice s'étendant le long de son fil sur une grande partie de la longueur du caisson 6. Chaque fil passe alors au travers d'un seul courant turbulent ascensionnel de grande longueur.One can for example provide that the orifices in the box have an elongated shape, which in horizontal projection has a longitudinal axis superimposed on the direction of travel of the corresponding wire or ribbon. We can even consider that there is only one elongated orifice for each wire, this orifice extending along its wire over a large part of the length of the box 6. Each wire then passes through a single turbulent ascending current of great length.
On peut encore envisager dans le caisson 6 plusieurs ouvertures allongées transversalement aux directions de défilement des fils et/ou rubans. Il se forme alors dans la cuve 1 plusieurs rideaux ascensionnels de liqueur de décapage que chaque fil et/ou ruban à décaper doit traverser successivement. We can also consider in the box 6 several elongated openings transverse to the directions of travel of the son and / or ribbons. It then forms in the tank 1 several ascending curtains of pickling liquor that each wire and / or strip to be stripped must pass successively.

Claims

REVENPICATIONS REVENPICATIONS
1. Procédé de décapage de fils et/ou rubans métalliques, comprenant1. Method for pickling metal wires and / or ribbons, comprising
- un défilement d'au moins un fil et/ou ruban métallique au travers d'un bain de liqueur de décapage, suivant une direction de défilement, caractérisé en ce qu'il comprend en outre- scrolling of at least one wire and / or metallic ribbon through a pickling liquor bath, in a running direction, characterized in that it further comprises
- une formation dans le bain, par fil et/ou ruban métallique, d'au moins un courant turbulent de liqueur de décapage qui s'écoule suivant une direction transversale à ladite direction de défilement, et - pendant ledit défilement, un passage de chaque fil et/ou ruban métallique au travers dudit au moins un courant turbulent qui lui correspond.a formation in the bath, by wire and / or metallic strip, of at least one turbulent stream of pickling liquor which flows in a direction transverse to said direction of travel, and - during said travel, one passage of each wire and / or metallic ribbon through said at least one turbulent current which corresponds to it.
2. Procédé suivant la revendication 1 , caractérisé en ce que chaque courant turbulent susdit s'écoule suivant ladite direction transversale de manière ascensionnelle.2. Method according to claim 1, characterized in that each said turbulent current flows in said transverse direction in an ascending manner.
3. Procédé suivant l'une des revendications 1 et 2, caractérisé en ce que, pendant ledit défilement, chaque fil et/ou ruban métallique passe au travers de plusieurs desdits courants turbulents, en succession. 3. Method according to one of claims 1 and 2, characterized in that, during said scrolling, each wire and / or metal strip passes through several of said turbulent currents, in succession.
4. Procédé suivant la revendication 3, caractérisé en ce que chaque courant susdit a une forme de jet à section arrondie qui, au- dessus d'un niveau correspondant au bain de repos, forme une excroissance turbulente de type geyser.4. Method according to claim 3, characterized in that each aforesaid current has a shape of jet with rounded section which, above a level corresponding to the quench bath, forms a turbulent outgrowth of geyser type.
5. Procédé suivant la revendication 3, caractérisé en ce que chaque courant susdit a une forme de jet qui a une section allongée suivant la direction de défilement et qui s'étend au-dessus d'un niveau correspondant au bain au repos.5. Method according to claim 3, characterized in that each aforesaid stream has a jet shape which has an elongated section in the direction of travel and which extends above a level corresponding to the bath at rest.
6. Procédé suivant l'une des revendications 1 et 2, caractérisé en ce que, pendant ledit défilement, chaque fil et/ou ruban métallique, passe au travers d'un courant turbulent qui s'étend longitudinalement le long du fil et/ou ruban métallique et qui s'écoule suivant ladite direction transversale, de manière ascensionnelle.6. Method according to one of claims 1 and 2, characterized in that, during said scrolling, each wire and / or metal strip, passes through a turbulent current which extends longitudinally along the wire and / or metal strip and which flows in said transverse direction, in an ascending manner.
7. Procédé suivant la revendication 3, caractérisé en ce que chaque courant turbulent successif susdit a une forme de rideau à section allongée transversalement à la direction de défilement et s'étend au-dessus d'un niveau correspondant au bain au repos.7. Method according to claim 3, characterized in that each successive turbulent current aforesaid has a form of curtain with an elongated section transverse to the direction of travel and extends above a level corresponding to the bath at rest.
8. Procédé suivant l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il comprend, en aval et/ou en amont du bain de liqueur de décapage, un rinçage dudit au moins un fil et/ou ruban métallique au travers de plusieurs rideaux successifs de liquide de rinçage, qui s'écoulent de manière turbulente et au travers desquels défile ledit au moins un fil et/ou ruban métallique.8. Method according to any one of claims 1 to 7, characterized in that it comprises, downstream and / or upstream of the pickling liquor bath, rinsing said at least one wire and / or metallic ribbon through of several successive curtains of rinsing liquid, which flow in a turbulent manner and through which the said at least one wire and / or metallic strip passes.
9. Procédé suivant la revendication 8, caractérisé en ce que le rinçage comprend une projection desdits rideaux de liquide de rinçage suivant un écoulement turbulent ascensionnel.9. Method according to claim 8, characterized in that the rinsing comprises a projection of said curtains of rinsing liquid according to a turbulent upward flow.
10. Dispositif de décapage de fils et/ou rubans métalliques, comprenant10. Device for stripping metal wires and / or ribbons, comprising
- des moyens d'entraînement en défilement (4, 5) d'au moins un fil et/ou ruban métallique (3), et - une cuve (1) contenant un bain de liqueur de décapage (2) que traverse ledit au moins un fil et/ou ruban métallique suivant une direction de défilement, caractérisé en ce qu'il comprend en outre- scrolling drive means (4, 5) of at least one wire and / or metal strip (3), and - a tank (1) containing a bath of pickling liquor (2) through which said at least a wire and / or metallic ribbon in a running direction, characterized in that it further comprises
- des moyens de formation, dans le bain, d'au moins un courant turbulent (29) de liqueur de décapage par fil et/ou ruban métallique (3) qui s'écoule suivant une direction transversale à ladite direction de défilement, ces moyens de formation étant agencés dans la cuve (1) de façon que chaque fil et/ou ruban métallique passe, pendant son défilement, au travers dudit au moins un courant turbulent (29) qui lui correspond. - Means for forming, in the bath, at least one turbulent stream (29) of pickling liquor by wire and / or metallic strip (3) which flows in a direction transverse to said direction of travel, these means being formed in the tank (1) so that each wire and / or metal strip passes, during its travel, through said at least one turbulent current (29) which corresponds to it.
11. Dispositif suivant la revendication 10, caractérisé en ce que lesdits moyens de formation comprennent un caisson (6) agencé dans le bain de décapage (2) en dessous dudit au moins un fil et/ou ruban métallique (3), une pompe d'alimentation (9) qui introduit sous pression de la liqueur de décapage dans le caisson (6), et un couvercle de fermeture (10) qui obture le caisson face audit au moins un fil et/ou ruban et qui présente des ouvertures (11) par lesquelles s'écoulent lesdits courants turbulents suivant un mouvement ascensionnel.11. Device according to claim 10, characterized in that said forming means comprise a box (6) arranged in the pickling bath (2) below said at least one wire and / or metallic strip (3), a pump d feed (9) which introduces pickling liquor under pressure into the box (6), and a closure cover (10) which closes the box facing said at least one wire and / or ribbon and which has openings (11 ) through which said turbulent currents flow in an upward movement.
12. Dispositif suivant la revendication 11 , caractérisé en ce que lesdites ouvertures (11) dans le couvercle de fermeture (10) sont des orifices de section circulaire.12. Device according to claim 11, characterized in that said openings (11) in the closure cover (10) are orifices of circular section.
13. Dispositif suivant la revendication 12, caractérisé en ce que le couvercle de fermeture (10) présente plusieurs ouvertures (11) à intervalles réguliers le long de la direction de défilement de chaque fil et/ou ruban métallique.13. Device according to claim 12, characterized in that the closure cover (10) has several openings (11) at regular intervals along the direction of travel of each wire and / or metal strip.
14. Dispositif suivant la revendication 11 , caractérisé en ce que lesdites ouvertures (11) dans le couvercle de fermeture (10) sont, en projection horizontale, allongées le long de la direction de défilement de chacun des fils et/ou rubans métalliques décapés (3).14. Device according to claim 11, characterized in that said openings (11) in the closure cover (10) are, in horizontal projection, elongated along the direction of travel of each of the pickled wires and / or ribbons ( 3).
15. Dispositif suivant l'une quelconque des revendications 10 à 14, caractérisé en ce qu'il comprend des moyens de recyclage de la liqueur de décapage qui retournent la liqueur issue des courants turbulents (29) formés, après contact avec ledit au moins un fil et/ou ruban métallique (3), à la pompe d'alimentation (9).15. Device according to any one of claims 10 to 14, characterized in that it comprises means for recycling the pickling liquor which return the liquor from the turbulent streams (29) formed, after contact with said at least one wire and / or metal tape (3), to the feed pump (9).
16. Dispositif suivant l'une quelconque des revendications 10 à 15, caractérisé en ce que la cuve (1) est fermée vis-à-vis de l'atmosphère extérieure et en ce qu'elle présente dans des parois latérales opposées une ouverture adaptée pour une entrée (12) et une sortie (13) de chacun desdits au moins un fil et/ou ruban métallique. 16. Device according to any one of claims 10 to 15, characterized in that the tank (1) is closed vis-à-vis the external atmosphere and in that it has in opposite side walls a suitable opening for an inlet (12) and an outlet (13) of each of said at least one wire and / or metallic strip.
17. Dispositif suivant la revendication 16, caractérisé en ce qu'il comprend, en amont de ladite entrée (12) et/ou en aval de ladite sortie (13), un dispositif de rinçage comportant une cuve (15) qui contient un liquide de rinçage et dans laquelle s'écoulent de manière turbulente un certain nombre de rideaux (24) successifs de liquide de rinçage, au travers desquels défile ledit au moins un fil et/ou ruban métallique (3). 17. Device according to claim 16, characterized in that it comprises, upstream of said inlet (12) and / or downstream of said outlet (13), a rinsing device comprising a tank (15) which contains a liquid rinse and in which flow in a turbulent manner a number of successive curtains (24) of rinse liquid, through which said at least one wire and / or metallic strip (3).
PCT/BE2003/000225 2002-12-18 2003-12-17 Method and device for stripping wires and/or metal strips WO2004055240A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2004559500A JP2006510801A (en) 2002-12-18 2003-12-17 Method and apparatus for pickling metal wires and / or strips
EP03782022A EP1579035A1 (en) 2002-12-18 2003-12-17 Method and device for stripping wires and/or metal strips
CA2510185A CA2510185C (en) 2002-12-18 2003-12-17 Method and device for stripping wires and/or metal strips
AU2003289775A AU2003289775A1 (en) 2002-12-18 2003-12-17 Method and device for stripping wires and/or metal strips

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2002/0734A BE1015255A3 (en) 2002-12-18 2002-12-18 Method and device for stripping the son and / or metal bands.
BE2002/0734 2002-12-18

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JP (1) JP2006510801A (en)
KR (1) KR100951151B1 (en)
CN (1) CN100457976C (en)
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BE (1) BE1015255A3 (en)
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AU2003289775A1 (en) 2004-07-09
CN1726306A (en) 2006-01-25
KR100951151B1 (en) 2010-04-06
JP2006510801A (en) 2006-03-30
CN100457976C (en) 2009-02-04
CA2510185C (en) 2010-11-09
EP1579035A1 (en) 2005-09-28
CA2510185A1 (en) 2004-07-01
KR20050089060A (en) 2005-09-07

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