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WO-2026093428-A1 - DEVICE AND METHOD FOR PICKLING AT LEAST ONE STEEL WIRE AND/OR STRIP IN CONTINUOUS MOTION

WO2026093428A1WO 2026093428 A1WO2026093428 A1WO 2026093428A1WO-2026093428-A1

Abstract

The invention relates to a device for pickling at least one steel wire and/or strip (1) in continuous motion, comprising: - means for moving at least one wire and/or strip (1) in a direction of motion (2); and - at least one pickling bath (3) filled with pickling liquor and comprising a bath entry (4) for the entry of at least one wire and/or strip (1) into the bath (3) and a bath exit (5) for the exit of at least one wire and/or strip (1) from the bath (3), between which entry and exit a pickling zone is located. The device is characterised in that it further includes: - a series of means (6) for spraying pickling liquor into the bath (3), the means comprising a pickling liquor inlet (7) in fluid communication with a pickling liquor source and in fluid communication with a substantially horizontal distribution line (8) submerged in the pickling liquor, the distribution line (8) having a longitudinal direction and being in fluid communication with at least two outlet lines (9), each outlet line (9) also having a longitudinal direction and being arranged so as to form a projecting angle α in the horizontal plane running from the longitudinal direction of the distribution line (8) to the longitudinal direction of the outlet line (9), the projecting angle α being between 45° and 135°, each outlet line (9) comprising at least one outlet (10) into the pickling bath (3), the outlet being submerged in the pickling liquor and arranged to spray at least one jet (14) of pickling liquor in a spraying direction, the series of means (6) for spraying pickling liquor comprising a first spraying means (11), N intermediate spraying means (12) and a last spraying means (13), the jet (14) of pickling liquor from at least one outlet (10) of the first spraying means (11) having a first spraying direction, the jet (14) of pickling liquor from at least one outlet (10) of an nth intermediate spraying means (12) having an nth spraying direction, the jet (14) of pickling liquor from at least

Inventors

  • MESNAOUI, Brahim

Assignees

  • FIB BELGIUM

Dates

Publication Date
20260507
Application Date
20251030
Priority Date
20241030

Claims (20)

  1. 1. A device for stripping at least one continuously moving steel wire and/or ribbon (1), comprising Means of driving at least one wire and/or ribbon (1) in a direction of movement (2), At least one pickling bath (3) filled with pickling liquor comprising a bath inlet (4) of said at least one wire and/or ribbon (1) into said bath (3) and a bath outlet (5) of said at least one wire and/or ribbon (1) from said bath (3), between which is a pickling zone, characterized in that it further comprises A series of means (6) for projecting pickling fluid into said bath (3) comprising a pickling fluid inlet (7) in fluidic communication with a pickling fluid source and in fluidic communication with a substantially horizontal distribution conduit (8) immersed in the pickling fluid, said distribution conduit (8) having a longitudinal direction and being in fluidic communication with at least two outlet conduits (9), each outlet conduit (9) also having a longitudinal direction and being arranged to form a salient angle α in the horizontal plane from the longitudinal direction of said distribution conduit (8) to the longitudinal direction of said outlet conduit (9), said salient angle α being between 45° and 135°, more particularly between 60° and 120°, and even more particularly between 80° and 100°, each outlet conduit (9) comprising at least one outlet (10) onto said pickling bath (3), immersed in the pickling fluid and arranged to project less a jet (14) of pickling liquid in a projection direction, said series of pickling liquid projection means (6) comprising a first projection means (11), N intermediate projection means (12) and a last projection means (13), said jet (14) of pickling liquid from at least one outlet (10) of said first projection means (11) having a first projection direction, said jet (14) of pickling liquid from at least one outlet (10) of an nth intermediate projection means (12) having an nth projection direction, said jet (14) of pickling liquid from at least one outlet (10) of said last projection means (13) having a last projection direction, said first, nth and last projection directions being each different from each other.
  2. 2. A device for stripping at least one continuously moving steel wire and/or ribbon (1) according to claim 1, wherein said first projection means (11) is positioned in said stripping bath (3) at said bath inlet (4), said at least 2 outlet conduits (9) of said first projection means (11) extend from said distributor conduit (8) in said direction of movement (2), said at least one outlet (10) of said at least 2 outlet conduits (9) being arranged to project at least one jet (14) of stripping liquid in said direction of movement (2).
  3. 3. A stripping device for at least one continuously moving steel wire and/or ribbon (1) according to claim 2, wherein said salient angle a going from the longitudinal direction of said distributor conduit (8) to the longitudinal direction of said outlet conduit (9) of said first projection means (11) is between 60° and 120°, more particularly between 80° and 100°, even more particularly between 85° and 95°.
  4. 4. A device for stripping at least one continuously moving steel wire and/or ribbon (1) according to any one of claims 1 to 3, wherein said last projection means (13) is positioned in said stripping bath (3) at said bath outlet (5), said at least 2 outlet conduits (9) of said last projection means (13) extend from said distributor conduit (8) in a direction opposite to said direction of movement (2), said at least one outlet (10) of said at least 2 outlet conduits (9) being arranged to project at least one jet (14) of stripping liquid in a direction opposite to said direction of movement (2).
  5. 5. A stripping device for at least one continuously moving steel wire and/or ribbon (1) according to claim 4, wherein said salient angle a going from the longitudinal direction of said distributor conduit (8) to the longitudinal direction of said outlet conduit (9) of said last projection means (13) is between 60° and 120°, more particularly between 80° and 100°, even more particularly between 85° and 95°.
  6. 6. Device for stripping at least one continuously moving steel wire and/or ribbon (1) according to any one of claims 1 to 5, wherein said N intermediate projection means (12) are positioned in said stripping zone.
  7. 7. A device for stripping at least one continuously moving steel wire and/or ribbon (1) according to any one of claims 1 to 6, wherein said at least 2 outlet conduits (9) of each intermediate projection means of said N intermediate projection means (12) extend from said distributor conduit (8) and 18 comprise a first outlet conduit (9) and a second outlet conduit (9), each provided with said outlet (10), the outlet of said first outlet conduit being arranged to project a first jet of pickling liquid in a primary projection direction, the outlet of said second outlet conduit being arranged to project a second jet of pickling liquid in a secondary projection direction, said primary projection direction and said secondary projection direction being countercurrent to each other.
  8. 8. Device for stripping at least one wire and/or ribbon (1) of steel in continuous motion according to any one of claims 1 to 7, in which N is between 1 and 20.
  9. 9. A device for stripping at least one continuously moving steel wire and/or ribbon (1) according to any one of claims 1 to 8, wherein N is between 2 and 19, preferably between 3 and 18, and wherein a first intermediate projection means and a second intermediate projection means adjacent to said first intermediate projection means are provided and each comprise a first and a second outlet conduit (9), said first and said second intermediate projection means being positioned such that said first outlet conduit (9) of said second intermediate projection means is the outlet conduit closest to said first outlet conduit (9) of the first intermediate projection means and such that said primary projection direction of said first intermediate projection means is counter-current to said primary projection direction of said second intermediate projection means.
  10. 10. A device for stripping at least one wire and/or ribbon (1) of steel in continuous motion according to claim 9, in which said first intermediate projection means and said second intermediate projection means are positioned such that said secondary projection direction of said first intermediate projection means is in the opposite direction to said second secondary projection direction of said second intermediate projection means.
  11. 1 1. A device for stripping at least one wire and/or ribbon (1 ) of steel in continuous motion according to any one of claims 1 to 10, in which said fluidic communication between said inlet of stripping liquor (7) and said distributor conduit (8) is located between said at least 2 outlet conduits (9) in fluidic communication with said distributor conduit (8).
  12. 12. A device for stripping at least one continuously moving steel wire and/or ribbon (1) according to any one of claims 1 to 11, wherein said outlets 19 (10) are flattened outlet fittings whose end in contact with the pickling liquid contained in said pickling bath (3) is in the form of a slot, preferably a horizontal slot.
  13. 13. A device for stripping at least one continuously moving steel wire and/or ribbon (1) according to any one of claims 1 to 12, further comprising a water supply, a rinsing distributor in fluidic communication with said water supply and equipped with outlet ports, disposed upstream of the stripping bath (3) and arranged to form an inlet water curtain (15), and means for collecting water from said curtain disposed outside said bath (3).
  14. 14. A device for stripping at least one continuously moving steel wire and/or ribbon (1) according to any one of claims 1 to 13, further comprising a water supply, a rinsing distributor in fluidic communication with said water supply and provided with outlet ports, disposed downstream of the stripping bath (3) and arranged to form an outlet water curtain (16), and means for collecting water from said curtain disposed outside said bath (3).
  15. 15. A device for pickling at least one wire and/or ribbon (1) of steel in continuous motion according to any one of claims 1 to 14, wherein said pickling liquor source is provided with heating means.
  16. 16. Method for pickling at least one wire and/or ribbon (1) of steel in continuous scrolling, implementing the device according to any one of claims 1 to 15.
  17. 17. A method for pickling at least one steel wire and/or tape (1) in continuous motion, wherein at least one wire and/or tape (1) is driven by drive means through a pickling bath (3) filled with pickling fluid, the turbulent flow of which is imparted by jets (14) of pickling fluid from a series of pickling fluid projection means (6) comprising a first projection means (11), N intermediate projection means (12), and a final projection means (13), N being between 1 and 20, preferably between 2 and 1, and even more preferably between 3 and 18, each pickling fluid projection means of said series of pickling fluid projection means (6) comprising a pickling fluid inlet (7) in fluidic communication with a pickling fluid source and in fluidic communication with a substantially horizontal distribution conduit (8) immersed in the pickling liquor, said distribution conduit (8) having a longitudinal direction and being in fluidic communication with at least 2 conduits 20 outlet (9), each outlet conduit (9) also having a longitudinal direction and being arranged so as to form a salient angle a in the horizontal plane going from the longitudinal direction of said distributing conduit (8) to the longitudinal direction of said outlet conduit (9), said salient angle a being between 45° and 135°, more particularly between 60° and 120°, even more particularly between 80° and 100°, each outlet conduit (9) comprising at least one outlet (10) on said pickling bath (3), immersed in the pickling liquor.
  18. 18. Method for pickling at least one steel wire and/or ribbon (1) in continuous flow according to claim 17, wherein said at least one wire and/or ribbon (1) passes through an inlet water curtain (15) upstream of said pickling bath (3).
  19. 19. Method for pickling at least one steel wire and/or ribbon (1) in continuous motion according to any one of claims 17 or 18, wherein said at least one wire and/or ribbon (1) passes through an outlet water curtain (16) downstream of said pickling bath (3).
  20. 20. A method for pickling at least one continuously moving steel wire and/or ribbon (1) according to any one of claims 17 to 19, wherein each moving wire and/or ribbon (1) has a moving characteristic, said moving characteristic being defined by a quantity D.v between 100 and 400 mm.m/min for moving wires, said moving characteristic being defined by a moving speed v between 5 and 30 m/min for moving ribbons, said moving characteristic being different or the same for each moving wire and/or ribbon (1).

Description

DEVICE AND METHOD FOR PICKLING AT LEAST ONE STEEL WIRE AND/OR RIBBON BY CONTINUOUS FOLDING The present invention relates to a device for stripping at least one steel wire and/or ribbon in continuous motion. Pickling baths for wires and/or ribbons moving through galvanizing devices have been known for a long time, allowing an impeccable finished product to be obtained. The pickling stage primarily removes impurities from the surface of the wires and/or tapes to be galvanized, such as oxides, rust, or other metallic residues accumulated during previous manufacturing stages. This pickling is carried out using an acidic pickling solution, which reacts chemically with these impurities to dissolve and effectively remove them from the surface of the wires and/or tapes. Impurities can accumulate on the surface of metal wires or ribbons due to the thermal, mechanical, or chemical processes they have undergone. Without effective pickling, these contaminants, such as oxides or rust, can compromise the adhesion of the coating applied during galvanizing. Poor adhesion can lead to premature corrosion, uneven coverage, or even coating detachment. This pickling step is therefore essential to guarantee the quality, durability, and corrosion resistance of the finished product. There are pickling devices for metal strips where the pickling bath is mostly divided into two parts by the strip being treated. The main challenge with these devices is to ensure homogeneous pickling of the entire surface of the strip on both sides. There are also pickling devices for moving wires and/or metal ribbons, where the wires and/or ribbons pass through the pickling bath at a certain speed, carrying with them a film of acidic liquor that creates a boundary layer of liquor around the wires and/or ribbons, preventing them from coming into contact with the reactive acid. The major challenge with these wire and/or ribbon pickling devices is ensuring the breaching of this boundary layer to allow the reactive acid to contact the metallic elements and guarantee their effective pickling. The present invention relates to the technology for stripping wires and/or ribbons in scrolling motion. The present invention relates more particularly to a device for stripping at least one continuously moving steel wire and/or ribbon, comprising: Means of training in the scrolling of at least one wire and/or ribbon in one scrolling direction, At least one pickling bath filled with pickling liquor comprising a bath inlet of said at least one wire and/or ribbon into said bath and a bath outlet of said at least one wire and/or ribbon from said bath, between which is a pickling zone. Such a device for stripping at least one continuously moving steel wire and/or tape is well known in the prior art, as described in BEI document 015255. This document describes a stripping device comprising a stripping solution bath through which the wires and/or tapes move. The moving wires and/or tapes pass through this bath by way of turbulent currents flowing in a direction transverse to the direction of movement, and which are generated by means for forming turbulent currents. These turbulent currents enable the rupture of the boundary layer surrounding the moving wires and/or tapes. Unfortunately, although the device described in document BEI 015255 presents certain solutions for the pickling of wires and/or tapes in continuous scrolling, these solutions are not sufficient for current galvanizing devices where the speed of the scrolling wires and/or tapes is constantly increasing and where the scrolling speed of juxtaposed wires and/or tapes is not necessarily the same. Indeed, increasing the speed of the moving wires and/or ribbons makes it more difficult to ensure effective breaching of the boundary layer surrounding them, as the contact time between the wires/ribbons and the turbulent currents is reduced. This can lead to decreased pickling efficiency and, consequently, a decrease in the quality of subsequent treatment during galvanizing. Furthermore, when the moving wires and/or ribbons have different speeds, it is essential to ensure consistent treatment quality for each. The invention aims to address these technological challenges and at least partially overcome the aforementioned drawbacks by providing a device for stripping at least one continuously moving steel wire and/or ribbon. which is both simple and effective for stripping wires and/or ribbons moving at high and/or different speeds. To solve this problem, the invention provides a device for stripping at least one continuously moving steel wire and/or ribbon, as described at the beginning, comprising a series of means for projecting stripping solution into said bath. This device includes a stripping solution inlet in fluidic communication with a stripping solution source and in fluidic communication with a substantially horizontal distribution conduit immersed in the stripping solution. Said distribution conduit has a