EP0369984A1 - Procédé et appareil pour le décapage de feuillards en acier affiné - Google Patents

Procédé et appareil pour le décapage de feuillards en acier affiné Download PDF

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Publication number
EP0369984A1
EP0369984A1 EP89890288A EP89890288A EP0369984A1 EP 0369984 A1 EP0369984 A1 EP 0369984A1 EP 89890288 A EP89890288 A EP 89890288A EP 89890288 A EP89890288 A EP 89890288A EP 0369984 A1 EP0369984 A1 EP 0369984A1
Authority
EP
European Patent Office
Prior art keywords
pickling
plant according
rollers
acid
installation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89890288A
Other languages
German (de)
English (en)
Other versions
EP0369984B1 (fr
Inventor
Gerald Dr. Maresch
Wilhelm Hofkirchner
Erich Mahr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andritz AG
Original Assignee
Andritz 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 Andritz AG filed Critical Andritz AG
Publication of EP0369984A1 publication Critical patent/EP0369984A1/fr
Application granted granted Critical
Publication of EP0369984B1 publication Critical patent/EP0369984B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • 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
    • 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
    • C23G1/086—Iron or steel solutions containing HF

Definitions

  • the object of the present invention was to develop a method which avoids the disadvantages mentioned at the outset.
  • Another object of the invention was to provide a device for carrying out the method, the risk of damage to the pickling material being reduced as much as possible.
  • a stainless steel strip is brought to the pickling line in the form of a bundle, the strip is unwound from a decoiler and at least pushed through a pre-descaling system, pickling sections and a flushing unit until it has reached a coiler or a front part system at the end of the treatment section, whereupon the strip is either clamped to the reel and wound up and pulled by it alone or in connection with other driven treatment rollers through the treatment system or cut into plates by the cross-cutting system.
  • the belt preferably traverses several pickling sections with different pickling media.
  • the tape can be treated in at least one section with sulfuric acid and in a subsequent section with a mixture of nitric and hydrofluoric acid.
  • the concentration of sulfuric acid is 250-600 g / l, preferably 300-450 g / l.
  • the temperature of this pickling acid can be 60-95, preferably 70-90 ° C.
  • the concentration of the nitric acid can be 100-250 g / l, preferably 100-200 g / l, and the hydrofluoric acid 10-100, preferably 20-80 g / l, calculated as the total hydrofluoric acid present.
  • the temperature of the mixed acid can be 30-70, preferably 40-65 ° C.
  • a system which consists at least of a decoiler, a belt control, at least one pickling section, a flushing system and a coiler and / or a cross-cutting unit, the pickling tub according to the invention consisting of a supporting structure made of steel, glass fiber-reinforced plastic or Polypropylene and a lining made of acid and abrasion-resistant material made of PVC, carbon stones, graphite-filled and / or aluminum oxide-filled polyester resin.
  • At least two pickling tanks each with at least one pickling section, are provided, a washing brush machine being arranged between the pickling tanks.
  • the system shown in Fig. 1 consists essentially of a decoiler 1, a straightener 2, a mechanical pre-descaling system, for. B. a radiator 3, two elongated flat pickling tubs 4 with an intermediate washing brush machine 5, a countercurrent rinsing system 7, a dryer 8 and a reel 9.
  • a driver 10 consisting of two superposed rollers and two each other opposite guide rollers 11 are provided.
  • a retraction unit 18 consisting of two superimposed rollers.
  • At least one of the pickling tanks 4 consists of at least two successive pickling sections 6, between which the belt 14 is guided between two squeeze rollers 15 (FIG. 2), of which the upper one is driven and contributes to the feed of the belt 14.
  • the pickling tub 4 or each of the pickling sections 6 is provided with a cover 16 which can be lifted off in sections and a bottom section 17 which rises on the inlet and outlet sides, which is for the pickling acid located in the tub 4 or in the pickling section 6 forms a weir.
  • the course of these bottom sections 17 is to be understood such that the inlet-side section runs downward in the strip running direction and the outlet-side section runs upwards.
  • the outlet-side section forms a funnel 19 for guiding the beginning of the strip with a corresponding section of the cover 16, which has the tendency to stand up between the squeeze rollers 15.
  • the pickling tub 4 or the pickling section 6 itself is made up of a supporting structure and a lining made of acid and abrasion-resistant material.
  • the load-bearing construction consists of steel with a lining made of chlorinated PVC or glass fiber reinforced plastic or pure plastic, e.g. Polypropylene.
  • There is a layer of coal stones above and the top layer is polyester resin filled with aluminum oxide or graphite.
  • the amount of filler for alumina can be between 10 and 100 percent by weight, but preferably between 20 and 50 percent by weight.
  • the values are between 50 to 400, preferably between 80 to 200, percent by weight.
  • polyester resin matrix and filler results in a material that on the one hand has sufficient resistance to the chemical and mechanical stresses of the pickling company, but which cannot damage the stainless steel strips.
  • the countercurrent rinsing system 7, as shown in FIG. 4, consists of a washing brush machine 5 'and one upstream and one downstream rinsing system 20 and 20'. On the input and on the output side of each washing system or between the washing system 20 or 20 'and washing brush Machine 5 'are, similarly as between the pickling sections 6, superimposed squeeze rollers 15, of which at least the upper one is driven.
  • the flushing systems 20, 20 'lower and upper spray pipes 21 and 22 are arranged, between which the band 14 to be treated is carried out in the direction of arrow A.
  • the bottom of the washing system 20, 20 ' is formed by plates 23, which are similar or identical to the lining of the pickling tubs 4 and each rise in the direction of movement A of the belt 14.
  • the lower spray tubes 21 are located between the plates 23 and below their upper surface in order to be protected against damage by the band 14, in particular when the beginning of the band is inserted.
  • the lower spray tubes 21 also provide for the formation of a water film between the underside of the belt and the lining material, so that the belt slides on this water film and does not touch the tub bottom, or only slightly. This also helps to avoid mechanical damage, both for the pickling material and for the system itself.
  • a funnel 24 is provided on the output side, similar to the pickling sections 6, which in the present case is formed by a base plate and a cover plate.
  • a pair of squeeze rollers 15 ' is connected downstream of the pair of squeeze rollers 15' at the outlet side of the second flushing system 20 ', a funnel 30 which corresponds to the funnel 24 being located between the two squeeze roller pairs 15, 15'.
  • the rinse is a countercurrent cascade rinse, in which the rinsing medium is fed from the third cascade into the second cascade, from where it flows into the first cascade, i.e. gets into the washing brush machine 5 '. From this, the rinsing medium of the preceding cascade is fed to the rinsing system 20 and from there to the washing brush machine 5 located between the two pickling tubs 4.
  • the used rinsing or washing medium flows into a collecting container (not shown), from where it is fed back into the rinsing or washing process at most via a preparation system.
  • the washing brush machine 5 located between the pickling tanks 4 corresponds to the previously described washing brush machine 5 ', the same parts in FIG. 3 being provided with the same reference numerals.
  • the same pickling medium or different medium can be used in the pickling tanks 4 or the pickling sections 6.
  • the pickling medium is introduced into the pickling tub 4 or into the pickling section 6 on the strip exit side and discharged at the strip entry side so that it flows against the movement of the strip 14.
  • the pickling medium is circulated in the pickling tub or in the pickling section at least once and a maximum of 20 times, preferably 5 to 10 times per hour.
  • a possible cross-cutting system which the pickled finished product in plates cuts, can replace the reel 9.
  • a slitting line which divides the strip into narrower strips, and a grinding system are arranged in front of the reel 9.
  • a device is provided with which the pickling tubs are quickly emptied and flooded with water when the strip stops.
  • this can be cooled by means of an externally arranged heat exchanger.
  • the reel can be preceded by a rolling mill in which the strip thickness is reduced.
  • the air or steam can be extracted from them by fans.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
EP89890288A 1988-11-15 1989-11-02 Procédé et appareil pour le décapage de feuillards en acier affiné Expired - Lifetime EP0369984B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2799/88 1988-11-15
AT0279988A AT394734B (de) 1988-11-15 1988-11-15 Verfahren und anlage zum beizen von edelstahlbaendern

Publications (2)

Publication Number Publication Date
EP0369984A1 true EP0369984A1 (fr) 1990-05-23
EP0369984B1 EP0369984B1 (fr) 1993-06-02

Family

ID=3540484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89890288A Expired - Lifetime EP0369984B1 (fr) 1988-11-15 1989-11-02 Procédé et appareil pour le décapage de feuillards en acier affiné

Country Status (10)

Country Link
EP (1) EP0369984B1 (fr)
JP (1) JP2926342B2 (fr)
KR (1) KR960002121B1 (fr)
AT (1) AT394734B (fr)
AU (1) AU618850B2 (fr)
BR (1) BR8905794A (fr)
DE (1) DE58904565D1 (fr)
ES (1) ES2048867T3 (fr)
FI (1) FI89511C (fr)
ZA (1) ZA898671B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995002706A1 (fr) * 1993-07-13 1995-01-26 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Procede et installation permettant de realiser des ebauches en acier special
EP0747508A1 (fr) * 1995-06-07 1996-12-11 Keramchemie GmbH Appareil de décapage en continu de pièces allongées
EP1035233A1 (fr) * 1999-03-05 2000-09-13 Andritz-Patentverwaltungsgesellschaft m.b.H. Installation de traitement en continu de bandes en acier

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100933925B1 (ko) * 2008-06-16 2009-12-28 (주)진양오일씰 수지와 고무의 표면처리를 위한 황산처리장치 및 이를이용한 황산처리방법
JP5679149B2 (ja) * 2010-02-05 2015-03-04 日新製鋼株式会社 ステンレス鋼帯の酸洗操業方法
CN112621389A (zh) * 2020-12-10 2021-04-09 中国重型机械研究院股份公司 一种铝板横切生产装置及其工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338208A (en) * 1965-09-07 1967-08-29 Paul U Voss Continuous equipment for pickling and slitting strip steel
DE1303381B (fr) * 1971-10-21 Moeller & Neumann Gmbh
DE2029244A1 (en) * 1970-06-13 1971-12-23 Gewerk Keramchemie Pickling plant liquor - vacuum and pressure actuated transfer
FR2562098A1 (fr) * 1984-03-30 1985-10-04 Clecim Sa Bac de decapage a l'acide de bandes de metal
EP0234239A2 (fr) * 1986-02-18 1987-09-02 OEKOLOGIA Beteiligungs-, Handels-, und Patentverwertungsgesellschaft m.b.H. Cuve de décapage
WO1988005832A1 (fr) * 1987-02-05 1988-08-11 Maschinenfabrik Andritz Aktiengesellschaft Procede et dispositif de traitement de la surface de bandes avec des fluides

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE319766C (de) * 1920-03-16 Electro Metallschweisserei Ges Verfahren und Vorrichtung zur Behandlung von Blechen zwecks Entfernung der Unreinlichkeiten und zur Erzielung einer gleichmaessigen Haerte
DE496147C (de) * 1928-07-25 1930-04-14 Julius Doubs Dipl Ing Verfahren und Vorrichtung zum Beizen und Spuelen von Feinblechen
US2543657A (en) * 1949-06-03 1951-02-27 Hanson Van Winkle Munning Co Scrubbing device with removable brush assembly
SE381289B (sv) * 1973-06-21 1975-12-01 Nyby Bruk Ab Tvastegsbetningsforfarande
DE3149086A1 (de) * 1981-12-11 1983-06-16 Dr. C. Otto & Comp. Gmbh, 4630 Bochum Behaelter zum beizen von baendern
JPS61199084A (ja) * 1985-02-28 1986-09-03 Nippon Steel Corp Ｃｒ系ステンレス鋼板の製造方法
JPS61266588A (ja) * 1985-05-22 1986-11-26 Nisshin Steel Co Ltd ステンレス鋼の脱スケ−ル方法
JPH0421474Y2 (fr) * 1986-07-24 1992-05-15
JPH0410219Y2 (fr) * 1986-12-05 1992-03-13
JPS63266083A (ja) * 1987-04-22 1988-11-02 Nippon Steel Corp 金属ストリツプの表面処理装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1303381B (fr) * 1971-10-21 Moeller & Neumann Gmbh
US3338208A (en) * 1965-09-07 1967-08-29 Paul U Voss Continuous equipment for pickling and slitting strip steel
DE2029244A1 (en) * 1970-06-13 1971-12-23 Gewerk Keramchemie Pickling plant liquor - vacuum and pressure actuated transfer
FR2562098A1 (fr) * 1984-03-30 1985-10-04 Clecim Sa Bac de decapage a l'acide de bandes de metal
EP0234239A2 (fr) * 1986-02-18 1987-09-02 OEKOLOGIA Beteiligungs-, Handels-, und Patentverwertungsgesellschaft m.b.H. Cuve de décapage
WO1988005832A1 (fr) * 1987-02-05 1988-08-11 Maschinenfabrik Andritz Aktiengesellschaft Procede et dispositif de traitement de la surface de bandes avec des fluides

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, Band 84, Heft 16, 1976, Seite 235, Zusammenfassung Nr. 109191y, Columbus, Ohio, US; A.P. CHEKHOV et al.: "Life of pickking baths", & METALL. GORNORUDN. PROM-ST. 1975, (4), 90-1 *
IRON AND STEEL ENGINEER, Band 54, Heft 12, Dezember 1977, Seiten 61-63, Pittsburg, US; J.W. RIPPIN: "Latest advances in HCI coll pickling" *
PATENT ABSTRACTS OF JAPAN, Band 11, Heft 132 (C-417)[2579], 24. April 1987; & JP-A-61 266 588 (NISSHIN STEEL CO. LTD) 26-11-1986 *
PATENT ABSTRACTS OF JAPAN, Band 11, Heft 24 (C-399)[2471], 23. Januar 1987; & JP-A-61 199 084 (NIPPON STEEL CORP.) 03-08-1986 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995002706A1 (fr) * 1993-07-13 1995-01-26 Andritz-Patentverwaltungs-Gesellschaft M.B.H. Procede et installation permettant de realiser des ebauches en acier special
US5725696A (en) * 1993-07-13 1998-03-10 Andritz-Patentverwaltungs-Gesselschaft M.B.H. Process and plant for production of raw stainless steel castings
EP0747508A1 (fr) * 1995-06-07 1996-12-11 Keramchemie GmbH Appareil de décapage en continu de pièces allongées
EP1035233A1 (fr) * 1999-03-05 2000-09-13 Andritz-Patentverwaltungsgesellschaft m.b.H. Installation de traitement en continu de bandes en acier

Also Published As

Publication number Publication date
AU618850B2 (en) 1992-01-09
FI89511B (fi) 1993-06-30
EP0369984B1 (fr) 1993-06-02
ES2048867T3 (es) 1994-04-01
ATA279988A (de) 1991-11-15
AT394734B (de) 1992-06-10
FI895408A0 (fi) 1989-11-13
FI89511C (fi) 1993-10-11
KR960002121B1 (ko) 1996-02-10
BR8905794A (pt) 1990-06-12
AU4431389A (en) 1990-05-24
DE58904565D1 (de) 1993-07-08
ZA898671B (en) 1990-08-29
JPH02185988A (ja) 1990-07-20
JP2926342B2 (ja) 1999-07-28
KR900008064A (ko) 1990-06-02

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