EP0601991B1 - Verfahren und Vorrichtung zur Reinigung von Metallbändern - Google Patents

Verfahren und Vorrichtung zur Reinigung von Metallbändern Download PDF

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Publication number
EP0601991B1
EP0601991B1 EP93870230A EP93870230A EP0601991B1 EP 0601991 B1 EP0601991 B1 EP 0601991B1 EP 93870230 A EP93870230 A EP 93870230A EP 93870230 A EP93870230 A EP 93870230A EP 0601991 B1 EP0601991 B1 EP 0601991B1
Authority
EP
European Patent Office
Prior art keywords
sheet
spraying
pressure
degreasing
bar
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
EP93870230A
Other languages
English (en)
French (fr)
Other versions
EP0601991A1 (de
Inventor
Emmanuel Delloye
Pascal Keiser
Christian Henno
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.)
Cockerill Mechanical Industries SA
Original Assignee
Cockerill Mechanical Industries 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 Cockerill Mechanical Industries SA filed Critical Cockerill Mechanical Industries SA
Publication of EP0601991A1 publication Critical patent/EP0601991A1/de
Application granted granted Critical
Publication of EP0601991B1 publication Critical patent/EP0601991B1/de
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
    • 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
    • B21B45/02—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 lubricating, cooling, or cleaning

Definitions

  • the invention relates to a new technology suitable for a continuous tape cleaning system metallic to provide the required surface cleanliness by subsequent coating treatments of such bands. It covers both a cleaning process and on an installation for this purpose.
  • a degreasing installation is usually consists of an immersion or sprinkler tunnel low pressure (to allow physico-chemical action of the solution), a brushing machine (exerting the action mechanical) and an electro-chemical degreasing cell low density.
  • GB-A-2 143 254 (SMS SCHLOEMANN-SIEMAG) describes a treatment at more than 60 bar on a surface using nozzles. It is technically undesirable to work at such pressures due to equipment (pumps) to be put into service and the operating conditions according to the present invention are not carried out.
  • the document AU-A-413 792 (BONAR) essentially describes a device for cleaning sheets but does not has no parametric indication to execute this cleaning operation under economic conditions and advantageous techniques envisaged by the present invention.
  • the present invention essentially aims to avoid the drawbacks inherent in the known solutions proposed according to the state of the art. It is particularly aimed at provide technology capable of providing mechanical action decisive (effective and repetitive and not subject efficiency drifts) going hand in hand with action physico-chemical provided by contact with a solution generally basic treatment.
  • a method of cleaning of metal strips, in particular of strips of steel comprising the treatment of the sheet by an action spraying at high pressure and thereby spraying with great impact of degreasing solutions on the surface sheet metal.
  • Head distance values from sheet metal projection from 30 to 200 mm proved particularly effective. Note that the greater the distance is low, the more spray heads will be required to cover the same area and therefore a limit material due to congestion is quickly reached.
  • the lower pressure limit indicated is that necessary to obtain a good efficiency of the treatment.
  • the upper pressure limit is essentially conditioned by economic reasons involving the use of simpler technical means, namely centrifugal type pumps, without having to use positive displacement pumps which would become necessary if higher pressures were considered.
  • the invention is based on the fact that have to separate the modes of action from the projection of solutions, of the mechanical action itself which is performed using the brushing machine, depending on the condition of the technical.
  • centrifugal pumps which is recommended according to the invention, makes it possible to reconcile pressures relatively high with high flow rates resulting in increased process efficiency.
  • Impact effect values of the order of 100 to 5000 and preferably 150 to 500 g / cm 2 have been found necessary.
  • the solution recommended by the invention allows avoid the cost and empiricism of operating cylinders brushers. We also avoid disturbances caused by brush fragments resulting from the wear of the brushes.
  • An installation suitable for implementation of the technique of the invention consists of an unwinder of sheet 1, an electrolytic installation or bath of quenching 2, a high pressure degreasing tunnel 3, a station 4, any subsequent treatment units 5 and a winder 6.
  • Such an installation may be suitable for treating sheet metal up to 400 mm wide and thick up to 1 mm at a line speed which can vary from very low value at 400 m / min.
  • the strip bearing the general reference 13 circulates in continuous and is continuously subjected to the action of jets spraying a degreasing solution comprising surfactants, from spray heads 15 distributed above and below, as well as across the entire width of the strip, for example at a distance of 70 mm from the latter.
  • a centrifugal pump 17 provides, at a pressure of 35 bars, a flow rate of 30 m 3 / h. for a strip width of 300 mm, which corresponds to an impact value of 270 g / cm 2 on the strip. This combined effect of impact action and chemical action is sufficient to perfectly treat a band circulating at a speed of 200 m / min.
  • the alkaline solution is recovered and recycled with possible interposition of filtration equipment (retaining dust and iron fines) and / or regeneration.
  • the equipment described may be combined in the cases suitable for an electrolytic degreasing cell high density, or other processing, if wish.
  • FIG. 3 the impact profile of a jet is shown, taking the impact pressure expressed in g / cm 2 as a function of the distance in mm from the projection head.
  • composition of the solutions used for the high pressure spraying is in principle suitable for operating operating conditions.
  • solutions can be used alkalines exerting a saponification effect of esters with optionally a surfactant. Many of these compositions are known.
  • an anti-foaming agent is generally useful and skilled in the art on the basis of simple tests may easily, depending on the circumstances, settle the different parameters such as temperature, pressure, distance jets, flow, type of jets and their directions, in particular by experimenting with the facilities and studying achievable jet profiles.
  • Sheets Metallic, contaminated with fats and metallic particles
  • Example cold rolled black steel sheet
  • Line speed 20 to 600 m / min
  • Line speed 200 m / min
  • High pressure degreasing mechanical parameters flow rate 50 to 150 m 3 / h / m sheet width 100 m 3 / h / m sheet width pressure: 20 to 60 bars 35 bars height of the sprays in relation to the sheet: 30 to 200 mm 70 mm number of ramps: 1 or more, preferably 2 to 4 2 impact force on load cell 1 cm 2 : 0.1 to 5 kg (average at 70 mm) 0.27 kg chemical parameters marketed in Belgium by Henkel under the name [P3VR6398-2] 10 ⁇ 70 g / l 50 g / l marketed in Belgium by Henkel under the name [P3VR 0536/1]

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Claims (5)

  1. Verfahren zum Reinigen von metallischem Band, insbesondere von Stahlband, dadurch gekennzeichnet, daß es die Behandlung des Bleches durch einen Zerstäubungsvorgang unter hohem Druck umfaßt und faktisch in einem Schleudern mit einem heftigen Aufprall von entfettenden Lösungen auf die Oberfläche des Bleches, unter einem Druck von mehr als 15 Bar und weniger als 60 Bar und aus einer Entfernung in bezug auf die obere Fläche des Bleches die größer oder gleich 30 mm ist, besteht, um so Werte für den Aufpralleffekt in der Größenordnung von 100 bis 5000 g/cm2 durch das Einstellen der Durchsatzleistungen der Zerstäubungs-köpfe zu erzielen.
  2. Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, daß der Druck von entfettenden Lösungen auf die Oberfläche des Bleches geringer als 40 Bar ist und daß die Werte für den Aufpralleffekt zwischen 150 und 500 g/cm2 liegen.
  3. Verfahren gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Entfernung der Schleuderköpfe in bezug auf die obere Fläche des Bleches zwischen 30 und 200 mm liegt.
  4. Verfahren gemäß irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Zerstäubung mit Hilfe einer Zentrifugalpumpe durchgeführt wird.
  5. Vorrichtung zum Reinigen von metallischen Band zwecks Durchführung des Verfahrens gemäß irgendeinem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß sie wenigstens einen Zerstäubungskopf für die Behandlung des Bleches durch einen Zerstäubungsvorgang unter hohem Druck sowie ein Schleudern mit einem heftigen Aufprall von entfettenden Lösungen auf die Oberfläche des Bleches, unter einem Druck von 15 bis 60 Bar aus einer Entfernung in bezug auf die obere Fläche des Bleches die größer oder gleich 30 mm ist, in sich einschließt, um so Werte für den Aufpralleffekt in der Größenordnung von 100 bis 5000 g/cm2 durch das Einstellen der Zerstäubungsköpfe zu erzielen, wobei eine Zirkulation in einem geschlossenen Kreislauf für die UmWälzung der besagten entfettenden Lösung vorgesehen ist.
EP93870230A 1992-12-08 1993-12-07 Verfahren und Vorrichtung zur Reinigung von Metallbändern Expired - Lifetime EP0601991B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9201082A BE1006465A3 (fr) 1992-12-08 1992-12-08 Procede et installation de nettoyage de bandes d'acier.
BE9201082 1992-12-08

Publications (2)

Publication Number Publication Date
EP0601991A1 EP0601991A1 (de) 1994-06-15
EP0601991B1 true EP0601991B1 (de) 1998-09-23

Family

ID=3886572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93870230A Expired - Lifetime EP0601991B1 (de) 1992-12-08 1993-12-07 Verfahren und Vorrichtung zur Reinigung von Metallbändern

Country Status (4)

Country Link
EP (1) EP0601991B1 (de)
AT (1) ATE171400T1 (de)
BE (1) BE1006465A3 (de)
DE (1) DE69321204D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102825076A (zh) * 2012-08-30 2012-12-19 宜昌三峡全通涂镀板有限公司 一种伸缩风箱式吹扫装置

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1009436A3 (fr) * 1995-06-22 1997-03-04 Cockerill Mech Ind Sa Procede et installation de nettoyage d'une bande metallique.
IT1296932B1 (it) * 1997-12-05 1999-08-03 Acciai Speciali Terni Spa Procedimento di decapaggio a spruzzo per nastro d'acciaio ed apparecchiatura per attuare detto procedimento
DE19834759C2 (de) * 1998-08-01 2002-02-21 Salzgitter Ag Verfahren und Vorrichtung zum Entfernen von Dendriten
DE19917561C1 (de) * 1999-04-19 2000-11-30 Sundwig Gmbh Bandbehandlungslinie für Metallbänder, insbesondere für hochfeste Edelstahlbänder
US6450183B1 (en) 1999-12-22 2002-09-17 Kolene Corporation Composition, apparatus, and method of conditioning scale on a metal surface
US6776359B2 (en) 2001-11-06 2004-08-17 Kolene Corporation Spray nozzle configuration
DE102005008939A1 (de) * 2005-02-26 2006-09-21 Sms Demag Ag Verfahren und Vorrichtung zum Reiningen eines Metallbandes
JP4830513B2 (ja) * 2006-01-26 2011-12-07 Ｊｆｅスチール株式会社 溶融亜鉛めっき鋼板の洗浄方法および洗浄装置
CN104043659B (zh) * 2013-03-14 2016-03-30 宝山钢铁股份有限公司 冷轧带钢表面边部残留液体吹扫装置
CN112588714A (zh) * 2020-11-27 2021-04-02 洛阳伍鑫金属材料科技有限公司 一种钛锭生产清洗工艺及其清洗装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU413792B2 (en) * 1970-05-28 1971-05-24 Apparatus for cleaning hot rolled steel
EP0050036B1 (de) * 1980-10-14 1986-03-05 Paromec Engineering Limited Reinigen langgestreckter Materialien und Vorrichtung dafür
DE3325198C2 (de) * 1983-07-13 1998-10-29 Schloemann Siemag Ag Verfahren und Anordnung zum Reinigen von kaltgewalzten Metallbändern
JPS6230892A (ja) * 1985-07-31 1987-02-09 Sumitomo Special Metals Co Ltd 長尺金属板の連続洗浄方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102825076A (zh) * 2012-08-30 2012-12-19 宜昌三峡全通涂镀板有限公司 一种伸缩风箱式吹扫装置

Also Published As

Publication number Publication date
EP0601991A1 (de) 1994-06-15
BE1006465A3 (fr) 1994-09-06
ATE171400T1 (de) 1998-10-15
DE69321204D1 (de) 1998-10-29

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