EP0789095B1 - System zum Behandeln von Edelstahlbändern - Google Patents

System zum Behandeln von Edelstahlbändern Download PDF

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Publication number
EP0789095B1
EP0789095B1 EP97250011A EP97250011A EP0789095B1 EP 0789095 B1 EP0789095 B1 EP 0789095B1 EP 97250011 A EP97250011 A EP 97250011A EP 97250011 A EP97250011 A EP 97250011A EP 0789095 B1 EP0789095 B1 EP 0789095B1
Authority
EP
European Patent Office
Prior art keywords
strip
descaling
electrolytic
steel strips
treatment plant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97250011A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0789095A1 (de
Inventor
Franz Gerhard Dipl.-Ing. Pempera
Michael Dipl.-Ing. Haentjes
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0789095A1 publication Critical patent/EP0789095A1/de
Application granted granted Critical
Publication of EP0789095B1 publication Critical patent/EP0789095B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
    • B08B3/123—Cleaning travelling work, e.g. webs, articles on a conveyor
    • 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
    • C25F1/06—Iron or steel
    • 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 a system for descaling the surface of Stainless steel strips in an electrolytic strip treatment plant for production of pickled hot strip and cold strip, with several immediately one after the other arranged alternately anodically connected with cathodic band polarization and connected with a corresponding anodic band polarization Electrodes
  • Tinder layers of the type described have usually been used in the past Blasting devices removed abrasively or with chemical pickling treatment processes. The combination of the two devices with one another has also been proposed.
  • the dual descaling system uses e.g. B. sodium sulfate, ammonium sulfate, Sulfuric acid or similar media as electrolytes and connects the electrolytic process with a known ultrasonic cleaning.
  • the effect of the electrolytic pickling part on descaling is based on one Volume enlargement of the scale through oxidation and a chipping effect the resulting gas bubbles.
  • these processes do not make it to produce flawless metallic pure material surface, because a large part of the Tinder remains due to adhesive energy on the base material of the belt.
  • annealed Cold strip is the most effective cleaning effect of an electrolytic pickle at 80 % to 100%, depending on the material quality. With hot strip, however, this effect drops to 20 % to 50%, because the higher roughness of the belt surface increases the adhesion of the Tinder causes.
  • electrolytic pickling is combined with a Ultrasonic cleaning, such as, for example, US-A-5 409 594, WO-A-95/03439 or propose and use JP-A-50 075 530 for treating wire Ultrasound generating devices, such as, for example, in GB-A-998 575 are described, so can be invented with the invented system Solve task and total descaling of the surface of the stainless steel strips of any kind of tinder.
  • a Ultrasonic cleaning such as, for example, US-A-5 409 594, WO-A-95/03439 or propose and use JP-A-50 075 530 for treating wire Ultrasound generating devices, such as, for example, in GB-A-998 575 are described, so can be invented with the invented system Solve task and total descaling of the surface of the stainless steel strips of any kind of tinder.
  • the power is to be changed of the electrodes and / or the ultrasound generating device depending on the To change the belt throughput speed.
  • the ultrasound generating device By arranging the ultrasound generating device above and below the Band, a further optimization of the proposed method is achieved. It has proven to be favorable if the ultrasound generating device Ultrasound waves at an angle adapted to the speed of the tape point against the tape running direction. In this way, the chipping effect of the adhering scale particles reinforced by the belt surface. A good effect leaves can also be achieved if, according to a further feature of the invention Ultrasonic waves can be introduced axially to the tape.
  • An additional area of application of the technology according to the invention is the removal of scale from hot-rolled normal steel. So far, the tinder has been and will be treated with acids such as B. H 2 SO 4 or HCl removed. Despite the use of regeneration processes to recover the acids, these processes also result in environmental pollution, namely immissions in air and water.
  • FIG 1 is roughly schematically a plant for performing the invention Procedure illustrated.
  • 5 is the treatment tank of the belt treatment plant referred to, which the band 4 to be treated passes in the horizontal direction.
  • the tape 4 is guided and supported by the rollers 3.
  • the so-called working electrodes Above and below the band are generally designated 1, they are in Belt running direction (arrow) alternately connected cathodically or anodically.
  • Ultrasound generating devices 2 are located between the working electrodes 1. and arranged below the band, which are symbolized by triangles. This Ultrasonic generation devices serve to support the detachment process of the surface scale.
  • the effect of the ultrasound on the belt surface is on the cavitation generated in the liquid is attributed to the scale, which is practical mechanically removed from the surface of the belt.
  • FIG. 2 shows two containers 5 and 6 arranged one behind the other.
  • the Band 4 first passes through the container 6 with the working electrodes 1 in the direction of the arrow, which are alternately connected cathodically or anodically. Subsequently the belt 4 passes through the container 5, in which several are grouped together Ultrasonic generating devices 2 are arranged above and below the Generate the band's ultrasound waves and loosen the scale by cavitation. At In this version, both descaling mechanisms can be used without mutual interference being controlled. While in the first container 6 the scale layer loosened by gas bubbles and oxidized in the anodic area can in subsequent second container 5 of this "loose" scale recognized with the help of ultrasound become.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
EP97250011A 1996-02-02 1997-01-24 System zum Behandeln von Edelstahlbändern Expired - Lifetime EP0789095B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19604971 1996-02-02
DE19604971A DE19604971A1 (de) 1996-02-02 1996-02-02 Verfahren und System zum Behandeln von Edelstahlbändern

Publications (2)

Publication Number Publication Date
EP0789095A1 EP0789095A1 (de) 1997-08-13
EP0789095B1 true EP0789095B1 (de) 1999-11-03

Family

ID=7785103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97250011A Expired - Lifetime EP0789095B1 (de) 1996-02-02 1997-01-24 System zum Behandeln von Edelstahlbändern

Country Status (6)

Country Link
US (1) US5897764A (es)
EP (1) EP0789095B1 (es)
JP (1) JPH101800A (es)
AT (1) ATE186338T1 (es)
DE (2) DE19604971A1 (es)
ES (1) ES2137756T3 (es)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1093450C (zh) * 1999-01-28 2002-10-30 北京工业大学 时效马氏体钢钨极氩弧焊金属粉芯焊丝及其制造方法
WO2001066829A1 (fr) 2000-03-08 2001-09-13 Nippon Steel Corporation Procede de decapage par ultrasons, et dispositif correspondant
ES2388602T3 (es) * 2002-10-04 2012-10-16 Tyco Healthcare Group Lp Aguja con la punta afilada
WO2006007639A1 (en) * 2004-07-16 2006-01-26 Soniclean Pty Ltd An improved apparatus and method for cleaning using a combination of electrolysis and ultrasonics
TWI487816B (zh) 2012-10-24 2015-06-11 Zen Material Technologies Inc Alkaline electrolysis derusting method
CN103898525A (zh) * 2012-12-28 2014-07-02 周宜锦 去除钢材的锈皮的方法
WO2020095091A1 (en) * 2018-11-06 2020-05-14 Arcelormittal Equipment improving the ultrasound cleaning
WO2020095090A1 (en) * 2018-11-06 2020-05-14 Arcelormittal Cleaning method by ultrasound
DE102020106353A1 (de) 2020-03-09 2021-09-09 Thyssenkrupp Steel Europe Ag Verfahren zum Entzundern eines Stahlbands und Anlage zum Entzundern eines Stahlbands

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB998575A (en) * 1962-01-17 1965-07-14 Noburo Sasaki Process for cleaning metal surfaces and apparatus therefor
JPS5075530A (es) * 1973-11-09 1975-06-20
US4046592A (en) * 1976-01-12 1977-09-06 Westinghouse Electric Corporation Wire cleaning system
AT399167B (de) * 1991-06-10 1995-03-27 Andritz Patentverwaltung Verfahren und vorrichtung zum elektrolytischen beizen von kontinuierlich durchlaufendem elektrisch leitendem gut
US5407544A (en) * 1993-07-21 1995-04-18 Dynamotive Corporation Method for removal of certain oxide films from metal surfaces
IL110297A0 (en) * 1993-07-21 1994-10-21 Dynamotive Corp A method for removal of certain oxide films from metal surfaces
TW296988B (es) * 1993-09-17 1997-02-01 Hitachi Ltd
US5409594A (en) * 1993-11-23 1995-04-25 Dynamotive Corporation Ultrasonic agitator
US5795460A (en) * 1996-04-10 1998-08-18 Dynamotive Corporation Method for removal of films from metal surfaces using electrolysis and cavitation action
US5653860A (en) * 1996-05-02 1997-08-05 Mitsubishi Semiconductor America, Inc. System for ultrasonic removal of air bubbles from the surface of an electroplated article

Also Published As

Publication number Publication date
JPH101800A (ja) 1998-01-06
DE59700638D1 (de) 1999-12-09
ES2137756T3 (es) 1999-12-16
EP0789095A1 (de) 1997-08-13
US5897764A (en) 1999-04-27
DE19604971A1 (de) 1997-08-07
ATE186338T1 (de) 1999-11-15

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