EP2028290A1 - Verfahren und Vorrichtung zur sekundären Entzunderung der metallischen bandförmigen Behandlungsgut mit Wassersprühen unter niedrigen Druck - Google Patents

Verfahren und Vorrichtung zur sekundären Entzunderung der metallischen bandförmigen Behandlungsgut mit Wassersprühen unter niedrigen Druck Download PDF

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Publication number
EP2028290A1
EP2028290A1 EP07291027A EP07291027A EP2028290A1 EP 2028290 A1 EP2028290 A1 EP 2028290A1 EP 07291027 A EP07291027 A EP 07291027A EP 07291027 A EP07291027 A EP 07291027A EP 2028290 A1 EP2028290 A1 EP 2028290A1
Authority
EP
European Patent Office
Prior art keywords
nozzles
water
descaling
pressure
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.)
Withdrawn
Application number
EP07291027A
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English (en)
French (fr)
Inventor
Valérie Leblanc
Jean-Luc Borean
Nathalie Mikler
Gilles Dussart
Sylvain Mialot
Patrice Matet
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.)
ArcelorMittal France SA
Original Assignee
ArcelorMittal France SA
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 ArcelorMittal France SA filed Critical ArcelorMittal France SA
Priority to EP07291027A priority Critical patent/EP2028290A1/de
Priority to PL08843858T priority patent/PL2185747T3/pl
Priority to AU2008320723A priority patent/AU2008320723B2/en
Priority to CN2008801096273A priority patent/CN101821429B/zh
Priority to MX2010001998A priority patent/MX2010001998A/es
Priority to ES08843858.5T priority patent/ES2618498T3/es
Priority to JP2010525383A priority patent/JP5150888B2/ja
Priority to PCT/FR2008/001200 priority patent/WO2009056712A2/fr
Priority to UAA201003056A priority patent/UA97853C2/ru
Priority to BRPI0815716-2A priority patent/BRPI0815716B1/pt
Priority to RU2010110616/02A priority patent/RU2441725C2/ru
Priority to KR1020107006056A priority patent/KR101240100B1/ko
Priority to US12/674,165 priority patent/US10378115B2/en
Priority to EP08843858.5A priority patent/EP2185747B1/de
Publication of EP2028290A1 publication Critical patent/EP2028290A1/de
Withdrawn 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
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/023—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously by spraying
    • 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
    • B08B3/02—Cleaning by the force of jets or sprays
    • B08B3/022—Cleaning travelling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically

Definitions

  • the present invention relates to the descaling operation of a metal strip, in particular steel, scrolling during hot rolling before entering the milling or finishing cages of the rolling mill
  • the secondary descaling of the steel strips is intended to rid the surface of the band of the so-called secondary scale, which is formed by rapid reoxidation of the hot metal during the stay of the strip in the open air after its primary descaling on leaving the oven. It thus intervenes doubly during the rolling, first before the entry of the strip in the roughing, and before entering the finisher rolling mill.
  • secondary descaling at the finisher inlet it being understood that what is said in this connection applies essentially also to secondary descaling at the entrance. of roughing.
  • the secondary scale is generally in the form of an adherent layer of metal oxides, typically between 50 and 100 microns thick, rather irregular in appearance.
  • the secondary descaling is successful when it provides at the entrance of the finisher a steel strip having on the surface a uniform layer of residual scale of 20 to 30 microns thick just beyond, to avoid encrustations of oxides on rolling rolls.
  • the descaling operation consists schematically in impacting the surface of the moving strip by powerful water jets delivered by spray bars placed at a short distance and provided with injection nozzles fed under high pressure, typically above 130-150 bars, or even more than 200 bars in some cases. It is thus intended to combine a thermal effect (the surface temperature of the strip, around 1100 ° C at the inlet of the descaling, drops almost instantly to near 600 ° C) with a mechanical effect due to the high amount of movement of water jets at impact to crack the scale and eliminate the surface by the effect of hunting.
  • a thermal effect the surface temperature of the strip, around 1100 ° C at the inlet of the descaling, drops almost instantly to near 600 ° C
  • a mechanical effect due to the high amount of movement of water jets at impact to crack the scale and eliminate the surface by the effect of hunting.
  • This operation is conventionally carried out in a descaling box, about 1 to 2 m long, placed some 5 m upstream of the finishing cages, crossed by the steel strip in rapid rectilinear scrolling and sheltering the upper irrigation booms and lower ones with nozzles inclined counter-current of about ten degrees.
  • the object of the invention is to provide an immediately operational response to the question of reducing the costs of the secondary descaling operation, that is to say a response compatible with a simple reorganization of existing equipment, so without necessarily involve the relocation of a new complete secondary descaling equipment.
  • the subject of the invention is a method for the secondary descaling of metal strips, in particular steel, in scrolling during their hot rolling by spraying water at their surface by means of watering ramps.
  • nozzles fed with pressurized water characterized in that the nozzles are fed under low hydraulic pressure, not exceeding 30 bars (and preferably below 10 bars, but not less than about 4 bars), and that, in order to ensure a thermal effect of the water sprayed on the surface to be de-scaled quantitatively similar to the thermal effect obtained with the known method of known secondary descaling at high pressure (ie a cooling of the band which lowers the temperature of its oxidized surface at approximately 600 ° C.), said nozzles are dimensioned so that they deliver a surface water flow rate on the strip similar to the surface water flow rate delivered by said high-pressure method. if we.
  • the invention is based on the discovery that it is even more the thermal effect of the jets of water on the cooling of the oxide crust that acts in favor of the secondary descaling that their mechanical effect on the fragmentation of this crust of oxides on the surface of the band, or, in other words, the effect of "high-pressure cleaning" of the powerful jets on their impact, as previously thought.
  • thermo effect of cooling and “thermal efficiency” are equivalent. They express the fact that, during the brief residence time of the strip in the descaling box (of the order of one second only), it is a question of ensuring a fall of the temperature of the oxide layer up to about 600 ° C, whatever its temperature at the entrance of this box. It is known that the underlying physical quantity, and ordinarily measurable on a rolling train, is the extracted caloric flux density.
  • the reference curve is curve A.
  • This curve A results from a conventional secondary descaling carried out using powerful water jets from nozzles fed at 130 bar pressure.
  • the other two curves B and C are representative of "low pressure" jets of 8 bars each, one (curve B) resulting from tests carried out with a flow rate of water equal to that of the curve A to jets "high pressure", namely 7,500 l / min / m 2 , the other, curve C, resulting from tests carried out with a significantly lower surface flow: 1500 l / min / m 2 (these values
  • This thermal effect which is thus expressed by a high rate of momentary cooling of the surface of the strip (several hundred degrees / sec) has been expressed, for the parameterization of the three curves of the graph, by a classically accessible physical quantity. from the measurement, namely the density of heat flux extracted from the product being rolled by the projected water (Heat Flux in English abbreviated, or HF), magnitude expressed in MW / m 2 band.
  • this characteristic quantity is particularly suitable for dimensioning a descaling installation, since it is directly correlated to the cooling water flow rate per m 2 of strip (the surface water flow rate) which itself is a direct parameter of definition. of the descaling operation: schematically, at a given HF value corresponds a given surface flow rate of cooling water and vice versa for a defined descaling installation.
  • the HF of the "High Pressure" descaling of reference (curve A) was kept constant around 10 MW / m 2 all along the watering operation (surface temperature ranging from 1100 to 600 ° C).
  • Those of the "low pressure" descaling according to the invention were maintained respectively over the same temperature range between 10 and 18 MW / m 2 in the experimental case representative of curve B and between 6 and 10 MW / m 2 for the case. of curve C.
  • the HF value is actually calculated from data specific to each descaling equipment that are, to mention only the most important, the temperature of the cooling water (here at 20 ° C for all tests) , the type of projection nozzles, the water outlet pressure of these nozzles, the distance separating the nozzle nose from the surface of the strip to be descaled, as well as the opening angle of the jet at the outlet of the nozzle.
  • the low-pressure curve C which displays a significantly lower HF (slightly less than 7 MW / m 2 ), reflects a correlatively lower quality of descaling.
  • the invention can easily be implemented by operating with pumps supplied at low pressure, thereby saving energy and reducing maintenance costs, provided that the conformation of the nozzles is adapted as necessary. to ensure a flow of surface water equivalent to that which would have been practiced in high pressure configuration.
  • the invention can not be limited to the examples described above, but applies to multiple variants and equivalents.
  • it is recalled that it relates to any form of secondary descaling, that is to say calamine removal previously formed by hot oxidation of a metal surface in contact with the ambient air.

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)
  • Metal Rolling (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP07291027A 2007-08-21 2007-08-21 Verfahren und Vorrichtung zur sekundären Entzunderung der metallischen bandförmigen Behandlungsgut mit Wassersprühen unter niedrigen Druck Withdrawn EP2028290A1 (de)

Priority Applications (14)

Application Number Priority Date Filing Date Title
EP07291027A EP2028290A1 (de) 2007-08-21 2007-08-21 Verfahren und Vorrichtung zur sekundären Entzunderung der metallischen bandförmigen Behandlungsgut mit Wassersprühen unter niedrigen Druck
PL08843858T PL2185747T3 (pl) 2007-08-21 2008-08-20 Sposób i urządzenie do usuwania zgorzeliny wtórnej z pasów metalowych przez natryskiwanie wody pod niskim ciśnieniem hydraulicznym
AU2008320723A AU2008320723B2 (en) 2007-08-21 2008-08-20 Method and equipment for secondary descaling of metallic strips by hydraulic low-pressure spraying of water
CN2008801096273A CN101821429B (zh) 2007-08-21 2008-08-20 通过低水压水喷射进行金属带二次除鳞的方法及设备
MX2010001998A MX2010001998A (es) 2007-08-21 2008-08-20 Metodo y equipo para descascarillamiento secundario de bandas metalicas mediante proyeccion de agua a base de presion hidraulica.
ES08843858.5T ES2618498T3 (es) 2007-08-21 2008-08-20 Procedimiento y equipo de decalaminado secundario de las bandas metálicas por proyección de agua a baja presión hidráulica
JP2010525383A JP5150888B2 (ja) 2007-08-21 2008-08-20 水を低い水圧で噴霧することによって金属帯の二次スケール除去のための方法および装置
PCT/FR2008/001200 WO2009056712A2 (fr) 2007-08-21 2008-08-20 Procede et equipment de decalaminage secondaire des bandes metalliques par projection d' eau a basse pression hydraulique2
UAA201003056A UA97853C2 (ru) 2007-08-21 2008-08-20 СПОСОБ ВТОРИЧНОГО удаления окалины
BRPI0815716-2A BRPI0815716B1 (pt) 2007-08-21 2008-08-20 Decapagem secundária econômica
RU2010110616/02A RU2441725C2 (ru) 2007-08-21 2008-08-20 Способ экономичного вторичного удаления окалины
KR1020107006056A KR101240100B1 (ko) 2007-08-21 2008-08-20 물의 유압식 저압 분무에 의해 금속 스트립을 2 차 디스케일링하기 위한 방법 및 장비
US12/674,165 US10378115B2 (en) 2007-08-21 2008-08-20 Economic secondary descaling
EP08843858.5A EP2185747B1 (de) 2007-08-21 2008-08-20 Verfahren und vorrichtung zur sekundären entzunderung der metallischen bandförmigen behandlungsgut mit wassersprühen unter niedrigen druck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07291027A EP2028290A1 (de) 2007-08-21 2007-08-21 Verfahren und Vorrichtung zur sekundären Entzunderung der metallischen bandförmigen Behandlungsgut mit Wassersprühen unter niedrigen Druck

Publications (1)

Publication Number Publication Date
EP2028290A1 true EP2028290A1 (de) 2009-02-25

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP07291027A Withdrawn EP2028290A1 (de) 2007-08-21 2007-08-21 Verfahren und Vorrichtung zur sekundären Entzunderung der metallischen bandförmigen Behandlungsgut mit Wassersprühen unter niedrigen Druck
EP08843858.5A Active EP2185747B1 (de) 2007-08-21 2008-08-20 Verfahren und vorrichtung zur sekundären entzunderung der metallischen bandförmigen behandlungsgut mit wassersprühen unter niedrigen druck

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08843858.5A Active EP2185747B1 (de) 2007-08-21 2008-08-20 Verfahren und vorrichtung zur sekundären entzunderung der metallischen bandförmigen behandlungsgut mit wassersprühen unter niedrigen druck

Country Status (13)

Country Link
US (1) US10378115B2 (de)
EP (2) EP2028290A1 (de)
JP (1) JP5150888B2 (de)
KR (1) KR101240100B1 (de)
CN (1) CN101821429B (de)
AU (1) AU2008320723B2 (de)
BR (1) BRPI0815716B1 (de)
ES (1) ES2618498T3 (de)
MX (1) MX2010001998A (de)
PL (1) PL2185747T3 (de)
RU (1) RU2441725C2 (de)
UA (1) UA97853C2 (de)
WO (1) WO2009056712A2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5136609B2 (ja) 2010-07-29 2013-02-06 Ｊｆｅスチール株式会社 成形性および耐衝撃性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法
DE102012214298A1 (de) 2012-08-10 2014-02-13 Sms Siemag Ag Verfahren zur Reinigung und/oder Entzunderung einer Bramme oder eines Vorbandes mittels eines Zunderwäschers und Zunderwäscher
FR3024058B1 (fr) * 2014-07-23 2016-07-15 Constellium France Procede et equipement de refroidissement
CN112139335B (zh) * 2020-09-09 2022-02-01 山东钢铁集团日照有限公司 一种高耐蚀易焊接热压零部件的制备方法
CN113751410B (zh) 2021-09-14 2022-07-22 山东钢铁集团日照有限公司 一种高耐蚀易焊接热压零部件的热浴成形工艺

Citations (19)

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Publication number Priority date Publication date Assignee Title
US3054162A (en) * 1957-02-16 1962-09-18 August Seuthe Maschf Method and apparatus for descaling strip material, especially strip iron
US3174491A (en) * 1963-10-23 1965-03-23 Kolene Corp Molten salt spray apparatus for descaling stainless steel
US3495613A (en) * 1965-05-28 1970-02-17 Werner & Pfleiderer Apparatus for supplying descaling installations and the like with a flow of low or high pressure fluid
JPS5976615A (ja) * 1982-10-25 1984-05-01 Nippon Steel Corp 鋼材の低圧デスケーリング方法
JPS60184409A (ja) * 1984-03-02 1985-09-19 Sumitomo Metal Ind Ltd 継目無鋼管の定型圧延方法
JPS61269925A (ja) * 1985-05-24 1986-11-29 Kawasaki Steel Corp 熱間圧延におけるスケ−ル除去方法
EP0241919A2 (de) * 1986-04-14 1987-10-21 Hitachi, Ltd. Entzunderung von dünnem warmgewalztem Bandmaterial
JPS63183714A (ja) * 1987-01-24 1988-07-29 Hitachi Ltd 熱間圧延ライン
EP0586823A2 (de) * 1992-07-31 1994-03-16 DANIELI & C. OFFICINE MECCANICHE S.p.A. Wasser verwendende Entzunderungsvorrichtung
US5505786A (en) * 1992-08-05 1996-04-09 Kolene Corporation Method for treating surface oxides on a metal alloy strip
JPH0890052A (ja) * 1994-09-20 1996-04-09 Ishikawajima Harima Heavy Ind Co Ltd 金属ストリップ脱スケール方法及び金属ストリップ脱スケール装置
JPH10128425A (ja) * 1996-10-31 1998-05-19 Nippon Steel Corp デスケーリング方法
JPH1147820A (ja) * 1997-08-04 1999-02-23 Nireco Corp スラブ切断面ディスケール装置とこれを用いたディスケール／マーキング装置
EP1034857A2 (de) * 1999-02-24 2000-09-13 Mitsubishi Heavy Industries, Ltd. System und Verfahren zum Verhindern von Zunderfehlern beim Warmwalzen
US6210501B1 (en) * 1995-10-11 2001-04-03 Nisshin Steel Co., Ltd. Heavy-duty cold-rolling for mechanically descaling a hot-rolled steel strip before pickling
US6385832B1 (en) * 1999-08-14 2002-05-14 Sms Schloemann-Siemag Aktiengesellschaft Descaling device for a continuous cast metal strip
US20040069034A1 (en) * 2001-03-03 2004-04-15 Jurgen Seidel Method for removing scale from strips
US20040251324A1 (en) * 2001-09-19 2004-12-16 Werner Volkel Spray boom for a hydraulic descaling facility
US20040261206A1 (en) * 2001-09-07 2004-12-30 Bernhard Ehls Cleaning slabs in front of the roller hearth furnace of a mini mill

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JPH07115060B2 (ja) 1992-01-07 1995-12-13 新日本製鐵株式会社 鋼材の脱スケール方法
JPH07171610A (ja) * 1993-10-26 1995-07-11 Sumitomo Metal Ind Ltd 熱延鋼板の圧延方法および圧延装置
JP2897652B2 (ja) 1994-09-05 1999-05-31 住友金属工業株式会社 マンドレルミルおよびそれを用いた管圧延方法
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JP3094911B2 (ja) * 1996-04-11 2000-10-03 住友金属工業株式会社 熱間圧延鋼板のデスケーリング方法
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JP3491605B2 (ja) 2000-07-14 2004-01-26 住友金属工業株式会社 表面性状に優れた熱延鋼板の製造方法および設備

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054162A (en) * 1957-02-16 1962-09-18 August Seuthe Maschf Method and apparatus for descaling strip material, especially strip iron
US3174491A (en) * 1963-10-23 1965-03-23 Kolene Corp Molten salt spray apparatus for descaling stainless steel
US3495613A (en) * 1965-05-28 1970-02-17 Werner & Pfleiderer Apparatus for supplying descaling installations and the like with a flow of low or high pressure fluid
JPS5976615A (ja) * 1982-10-25 1984-05-01 Nippon Steel Corp 鋼材の低圧デスケーリング方法
JPS60184409A (ja) * 1984-03-02 1985-09-19 Sumitomo Metal Ind Ltd 継目無鋼管の定型圧延方法
JPS61269925A (ja) * 1985-05-24 1986-11-29 Kawasaki Steel Corp 熱間圧延におけるスケ−ル除去方法
EP0241919A2 (de) * 1986-04-14 1987-10-21 Hitachi, Ltd. Entzunderung von dünnem warmgewalztem Bandmaterial
JPS63183714A (ja) * 1987-01-24 1988-07-29 Hitachi Ltd 熱間圧延ライン
EP0586823A2 (de) * 1992-07-31 1994-03-16 DANIELI & C. OFFICINE MECCANICHE S.p.A. Wasser verwendende Entzunderungsvorrichtung
US5505786A (en) * 1992-08-05 1996-04-09 Kolene Corporation Method for treating surface oxides on a metal alloy strip
JPH0890052A (ja) * 1994-09-20 1996-04-09 Ishikawajima Harima Heavy Ind Co Ltd 金属ストリップ脱スケール方法及び金属ストリップ脱スケール装置
US6210501B1 (en) * 1995-10-11 2001-04-03 Nisshin Steel Co., Ltd. Heavy-duty cold-rolling for mechanically descaling a hot-rolled steel strip before pickling
JPH10128425A (ja) * 1996-10-31 1998-05-19 Nippon Steel Corp デスケーリング方法
JPH1147820A (ja) * 1997-08-04 1999-02-23 Nireco Corp スラブ切断面ディスケール装置とこれを用いたディスケール／マーキング装置
EP1034857A2 (de) * 1999-02-24 2000-09-13 Mitsubishi Heavy Industries, Ltd. System und Verfahren zum Verhindern von Zunderfehlern beim Warmwalzen
US6385832B1 (en) * 1999-08-14 2002-05-14 Sms Schloemann-Siemag Aktiengesellschaft Descaling device for a continuous cast metal strip
US20040069034A1 (en) * 2001-03-03 2004-04-15 Jurgen Seidel Method for removing scale from strips
US20040261206A1 (en) * 2001-09-07 2004-12-30 Bernhard Ehls Cleaning slabs in front of the roller hearth furnace of a mini mill
US20040251324A1 (en) * 2001-09-19 2004-12-16 Werner Volkel Spray boom for a hydraulic descaling facility

Also Published As

Publication number Publication date
CN101821429B (zh) 2012-05-30
KR20100058573A (ko) 2010-06-03
ES2618498T3 (es) 2017-06-21
JP5150888B2 (ja) 2013-02-27
BRPI0815716A2 (pt) 2015-02-10
AU2008320723B2 (en) 2012-03-29
WO2009056712A3 (fr) 2009-07-16
RU2010110616A (ru) 2011-09-27
PL2185747T3 (pl) 2017-06-30
UA97853C2 (ru) 2012-03-26
RU2441725C2 (ru) 2012-02-10
US10378115B2 (en) 2019-08-13
AU2008320723A1 (en) 2009-05-07
MX2010001998A (es) 2010-05-27
US20110146706A1 (en) 2011-06-23
EP2185747B1 (de) 2016-12-21
KR101240100B1 (ko) 2013-03-07
JP2010536581A (ja) 2010-12-02
WO2009056712A2 (fr) 2009-05-07
CN101821429A (zh) 2010-09-01
WO2009056712A8 (fr) 2010-03-18
BRPI0815716B1 (pt) 2021-03-30
EP2185747A2 (de) 2010-05-19

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