EP1283914B1 - Procede et dispositif pour le decapage de feuillards d'acier special lamines a chaud - Google Patents

Procede et dispositif pour le decapage de feuillards d'acier special lamines a chaud Download PDF

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Publication number
EP1283914B1
EP1283914B1 EP01938180A EP01938180A EP1283914B1 EP 1283914 B1 EP1283914 B1 EP 1283914B1 EP 01938180 A EP01938180 A EP 01938180A EP 01938180 A EP01938180 A EP 01938180A EP 1283914 B1 EP1283914 B1 EP 1283914B1
Authority
EP
European Patent Office
Prior art keywords
pickling
washing
stages
special steel
strip
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
EP01938180A
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German (de)
English (en)
Other versions
EP1283914A2 (fr
Inventor
Michael 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.)
SMS Siemag AG
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SMS Demag AG
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Filing date
Publication date
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1283914A2 publication Critical patent/EP1283914A2/fr
Application granted granted Critical
Publication of EP1283914B1 publication Critical patent/EP1283914B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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

Definitions

  • the invention relates to a method and a device for pickling stainless steel hot strips with austenitic, ferritic and / or martensitic Structure that passes through a pickling line without mechanical beam descaling Pickling stages with acids and rinsing stages with rinsing water.
  • the invention has for its object when pickling without an additional Blasting processes for descaling and above all the costs for pickling.
  • the object is achieved according to the invention in that the stainless steel hot band is pickled in the pre-pickling stages with hydrochloric acid and in the first flushing stages with nitric acid and an equivalent substitute pickling medium which is formed from a mixture of sulfuric or hydrochloric acid with hydrogen peroxide and other additives and in further flushing stages with flushing water is treated.
  • the process does not require additional blasting and the costs for the acids are reduced.
  • pickling with nitric acid or an equivalent replacement pickling medium any remaining scale residue on the belt can be removed.
  • the use of blasting cabins is not necessary. Since the annealing of stainless steel hot strip is not absolutely necessary after further processing, the costly production on an annealing and pickling line can be avoided under certain circumstances.
  • the pickling in hydrochloric acid drastically reduces the amount of metal dissolved in the nitric acid. This is associated with a reduction in the known problematic reaction products (NO x gases in the exhaust air and nitrates in the waste water) which are known from production. Even when using an appropriate replacement medium for the nitric acid, the known disadvantages are also eliminated. According to the teaching of the invention, pickled stainless steel warm tapes with an improved surface quality are also achieved. In addition, the operating costs are significantly lower compared to the known methods.
  • the stainless steel warm band in at least one Pickling stage is pickled with hydrochloric acid.
  • the stainless steel warmer at least one or more Spdi stages with the nitric acid and an equivalent Replacement pickling medium is treated. This can advantageously be a complete descaling can be achieved.
  • the stainless steel warmer subsequently is treated with rinsing water in two or more rinsing stages. Thereby the acids used are completely eliminated.
  • the device for pickling stainless steel hot-rolled strip with an austenitic, ferritic and / or martensitic structure which can possibly be guided through a pickling line behind a soft annealing furnace, achieves the object according to the invention in that the stainless steel warming strip, when entering a pickling line, consisting of several pickling tanks with hydrochloric acid and several rinse tanks with nitric acid and an equivalent replacement pickling medium, which is formed from a mixture of sulfuric or hydrochloric acid with hydrogen peroxide and other additives, and further rinse tanks can be treated with rinse water.
  • the advantages are the improvements compared to the prior art that have already been mentioned for the method steps.
  • the number of pickling stages can be varied. A preferable design results from the fact that in the pickling line the first three pickling tanks are included Hydrochloric acid are filled.
  • An advantageous embodiment is proposed in that the rinsing stages from at least one washing tank with nitric acid and an equivalent Replacement pickling medium and from at least two rinsing tanks with rinsing water are formed.
  • the stainless steel warm strip 1 arrives from strip coils of an input section 2 by a welding device 3 (for a coil change) through a trimming machine 4 into an input loop machine 5 and, if required, through a soft annealing furnace 6 into the pickling line 7.
  • the pickling line 7 forms Pickling stages 8 and rinsing stages 9, which are described in more detail below.
  • the stainless steel hot band 1 emerges from the last rinsing stage 9 and into one Output loop former 10 and passes through an output scissors at the end of the tape 11. During the continuous run, the stainless steel warm band 1 wound in bundles in the output section 12 again.
  • the pickling line 7 is in the normal steel production Pickling stage 8 operated with three pickling tanks and hydrochloric acid, while the rinsing stages all work with rinse water (rinses 1 and 2, rinses 3 to 6).
  • the pickling line 7 is constructed as follows: In pickling tanks 16 of the pickling line 7 is in each case in the pickling stages 8 as pickling medium 14a hydrochloric acid 13. Die Rinse stages 9 are formed by rinse tanks 17 in which there is a replacement pickling medium 14b in the sink no. 1 and located in the # 2 sink nitric acid 14. In the following rinse stages 9, rinse water 15 is used.
  • the process now proceeds in such a way that the stainless steel hot band 1 in the pickling stages 8 pickled with hydrochloric acid 13 and in the first rinse steps 9 with nitric acid 14 as well as an equivalent pickling medium 14b rinsed and in further rinsing stages 9 is treated with rinse water 15.
  • Two or more pickling stages can be used 8 can be used with hydrochloric acid 13.
  • the stainless steel warmer can also be used 1 in two or more rinsing stages 9 with the nitric acid 14 and one equivalent pickling medium 14b are treated. Then that will Stainless steel hot band 1 rinsed in two or more rinse levels 9 with rinse water 15.

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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)
  • Forging (AREA)

Claims (8)

  1. Procédé pour le décapage de bande d'acier spécial laminée à chaud (1) avec une structure austénitique, ferritique et/ou de martensite, qui est guidée via des étapes de décapage (8) avec de l'acide chlorhydrique (13) dans des étapes de rinçage (9) avec de l'acide nitrique (14) et avec de l'eau de rinçage (15), caractérisé en ce que la bande d'acier spécial (1) sortant d'un four de recuit (6) est décapée, après le décapage dans une étape de décapage (8), sans décalaminage mécanique par jets, dans une première étape de rinçage (9) avec un agent de décapage de remplacement (14b), constitué d'un mélange d'acide sulfurique ou d'acide chlorhydrique (13) avec du peroxyde d'hydrogène et d'autres additifs, et est rincée dans une deuxième étape de rinçage (9) avec de l'acide nitrique (14) et est traitée dans d'autres étapes de rinçage (9) avec de l'eau de rinçage (15).
  2. Procédé selon la revendication 1, caractérisé en ce que la bande d'acier spécial laminée à chaud (1) est décapée dans deux ou plus de deux étapes de décapage (8) avec de l'acide chlorhydrique (13).
  3. Procédé selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que la bande d'acier spécial laminée à chaud (1) est traitée dans au moins une ou plusieurs étapes de rinçage (9) avec de l'acide nitrique (14) ou le mélange équivalent d'agent de décapage de remplacement (14b).
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la bande d'acier spécial laminée à chaud (1) est ensuite traitée dans deux ou plusieurs étapes de rinçage (9) avec de l'eau de rinçage (15).
  5. Dispositif pour le décapage de bande d'acier spécial laminée à chaud (1) présentant une structure austénitique, ferritique et/ou de martensite qui peut être guidée sans décalaminage mécanique par jets, en aval d'un four de recuit (6) dans une ligne de décapage (7), caractérisé en ce que la bande d'acier spécial laminée à chaud (1) peut être traitée lors de l'introduction dans la ligne de décapage (7), constituée de plusieurs réservoirs de décapage (16), avec de l'acide chlorhydrique (13), et plusieurs de réservoirs de rinçage (17) avec de l'acide nitrique (14) ou un agent de décapage de remplacement équivalent (14b), qui est formé par un mélange d'acide sulfurique ou d'acide chlorhydrique (13) avec du peroxyde d'hydrogène et d'autres additifs, et d'autres réservoirs de rinçage (17), avec de l'eau de rinçage (15), le milieu de décapage de remplacement (14b) étant utilisé dans une première étape de rinçage et l'acide nitrique (14) dans une deuxième étape de rinçage.
  6. Dispositif selon la revendication 5, caractérisé en ce que dans la ligne de décapage (7), les trois premiers réservoirs de décapage (16) sont remplis d'acide chlorhydrique (13).
  7. Dispositif selon l'une quelconque des revendications 5 ou 6, caractérisé en ce que dans la ligne de décapage (7), les étapes de rinçages (9) sont constituées de réservoirs de rinçage (17) avec de l'acide nitrique (14) ou l'agent de remplacement équivalent (14b) et de réservoirs de rinçage (17) consécutifs avec de l'eau de rinçage (15).
  8. Dispositif selon la revendication 7, caractérisé en ce que les étapes de rinçage (9) sont constituées à chaque fois d'au moins un réservoir de rinçage (17) avec de l'acide nitrique (14) ainsi qu'avec l'agent de décapage de remplacement équivalent (14b) et d'au moins deux réservoirs de rinçage (17) avec de l'eau de rinçage (15).
EP01938180A 2000-05-08 2001-05-05 Procede et dispositif pour le decapage de feuillards d'acier special lamines a chaud Expired - Lifetime EP1283914B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10022083A DE10022083A1 (de) 2000-05-08 2000-05-08 Verfahren und Einrichtung zum Beizen von Edelstahlwarmbändern
DE10022083 2000-05-08
PCT/EP2001/005118 WO2001086024A2 (fr) 2000-05-08 2001-05-05 Procede et dispositif pour le decapage de feuillards d'acier special lamines a chaud

Publications (2)

Publication Number Publication Date
EP1283914A2 EP1283914A2 (fr) 2003-02-19
EP1283914B1 true EP1283914B1 (fr) 2004-06-30

Family

ID=7640997

Family Applications (1)

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EP01938180A Expired - Lifetime EP1283914B1 (fr) 2000-05-08 2001-05-05 Procede et dispositif pour le decapage de feuillards d'acier special lamines a chaud

Country Status (13)

Country Link
US (1) US6843860B2 (fr)
EP (1) EP1283914B1 (fr)
JP (1) JP2004511649A (fr)
KR (1) KR20020091279A (fr)
CN (1) CN1281789C (fr)
AT (1) ATE270354T1 (fr)
CA (1) CA2406647A1 (fr)
DE (2) DE10022083A1 (fr)
ES (1) ES2223866T3 (fr)
MX (1) MXPA02011004A (fr)
TR (1) TR200401642T4 (fr)
WO (1) WO2001086024A2 (fr)
ZA (1) ZA200209827B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2011257886B2 (en) * 2010-05-27 2016-01-07 Mj Liquid Solutions Inc. Method of treating rolled steel article
CN102011131B (zh) * 2010-07-27 2012-05-23 福建方明环保科技有限公司 污水零排放金属带材表面清洗装置及其清洗方法
CN103572037A (zh) * 2013-10-12 2014-02-12 酒泉钢铁(集团)有限责任公司 一种钢铁热轧卷材板材共线热处理生产线及生产工艺
CN112795934B (zh) * 2020-12-27 2022-07-08 山东盛阳金属科技股份有限公司 一种300系不锈钢花纹板酸洗系统及其工艺

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE561107A (fr) * 1956-09-25
JPS6063390A (ja) * 1983-09-19 1985-04-11 Kawasaki Steel Corp フェライト系およびマルテンサイト系ステンレス鋼帯の連続酸洗方法
JP2613317B2 (ja) * 1990-04-20 1997-05-28 川崎製鉄株式会社 ステンレス鋼帯の焼鈍・脱スケール方法
US5821212A (en) * 1997-02-13 1998-10-13 Crown Technology, Inc. Rinse aid and process for stainless steel

Also Published As

Publication number Publication date
DE10022083A1 (de) 2001-11-15
JP2004511649A (ja) 2004-04-15
ZA200209827B (en) 2003-10-07
CA2406647A1 (fr) 2002-10-28
ATE270354T1 (de) 2004-07-15
US6843860B2 (en) 2005-01-18
ES2223866T3 (es) 2005-03-01
CN1281789C (zh) 2006-10-25
WO2001086024A3 (fr) 2002-11-07
DE50102747D1 (de) 2004-08-05
KR20020091279A (ko) 2002-12-05
TR200401642T4 (tr) 2004-08-23
MXPA02011004A (es) 2003-04-25
CN1439063A (zh) 2003-08-27
US20030178045A1 (en) 2003-09-25
WO2001086024A2 (fr) 2001-11-15
EP1283914A2 (fr) 2003-02-19

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