EP0640413A1 - Installation de laminage - Google Patents

Installation de laminage Download PDF

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Publication number
EP0640413A1
EP0640413A1 EP94890135A EP94890135A EP0640413A1 EP 0640413 A1 EP0640413 A1 EP 0640413A1 EP 94890135 A EP94890135 A EP 94890135A EP 94890135 A EP94890135 A EP 94890135A EP 0640413 A1 EP0640413 A1 EP 0640413A1
Authority
EP
European Patent Office
Prior art keywords
rolling
rotor
roll stand
rolling stock
stock
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
EP94890135A
Other languages
German (de)
English (en)
Other versions
EP0640413B1 (fr
Inventor
Gerlinde Dipl.-Ing. Djumlija
Friedrich Moser
Johann Oberhumer
Heinrich Pühringer
Klaus Dipl.-Ing. Dr. Zeman
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voest Alpine Industrienlagenbau GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3519041&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0640413(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voest Alpine Industrienlagenbau GmbH filed Critical Voest Alpine Industrienlagenbau GmbH
Publication of EP0640413A1 publication Critical patent/EP0640413A1/fr
Application granted granted Critical
Publication of EP0640413B1 publication Critical patent/EP0640413B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass

Definitions

  • the invention relates to a rolling device with a roll stand and an upstream descaling device.
  • the device provided for carrying out the cooling process according to DE-C - 41 34 599 has spray nozzles which are arranged at a greater distance from the rolls of the roll stand and by means of which coolant is sprayed obliquely against the surface of the rolling stock directly in the direction of the roll gap, so that part of the coolant jet hits the surface of the rolling stock and part of the surface of the roll.
  • spray nozzles which are arranged at a greater distance from the rolls of the roll stand and by means of which coolant is sprayed obliquely against the surface of the rolling stock directly in the direction of the roll gap, so that part of the coolant jet hits the surface of the rolling stock and part of the surface of the roll.
  • a descaling device for the online rolling of a cast strand, as is known from rolling mill technology - for example presented by US-A-5,001,915.
  • rolling mill technology for example presented by US-A-5,001,915.
  • it has been found that, in order to achieve effective descaling, large quantities of water must be sprayed onto the cast strand, which leads to a relatively high temperature drop in the cast strand, in particular its surface areas, so that the descaling process known from rolling mill technology is suitable for the descaling of on-line rolled cast strands, especially because of the very low rolling speed ( casting speed), cannot be achieved without disadvantages.
  • the invention therefore has as its object to provide a rolling device with a roll stand and a pre-descaling device which meets the diverging requirements - namely perfect surface quality through complete scaling removal and as little liquid application as possible.
  • the rotor descaling device works primarily by mechanically removing the scale. This removal is promoted by quenching the scale by the liquid jets, which breaks up the scale skin.
  • a mechanical scale breaker such as a bending device, can advantageously be provided in front of the rotor descaling device to assist in breaking up the scale skin.
  • Rotor descaling devices are known per se, for example from DE-A-31 25 146 for descaling hot steel blocks.
  • a spray bar extending across the entire width of the steel block to its surface and parallel is set in rotation about an axis directed perpendicular to its longitudinal extent.
  • the planes placed through the axis of the liquid jets and parallel to an axis of one of the rolls of the roll stand always form an acute angle with the rolling direction placed at the point of impact of the liquid jet on the surface of the rolling stock, the tip of which is opposite to the rolling direction
  • the rotor axis (s) of the rotor descaling device is / are arranged inclined with respect to the surface of the rolling stock, the angle of inclination of the rotor axis advantageously being opposite a straight line perpendicular to the surface of the rolling stock is greater than the angle that the axis of a liquid jet forms with the rotor axis.
  • a particularly short arrangement of the descaling device in front of the rolls of the roll stand can be achieved if a partial area of the spray area generated by the liquid jets of the rotor descaling device is shielded from the surface of the rolling stock.
  • a cover plate with a liquid drainage channel which extends across the surface of the rolling stock, is expediently provided to shield the partial area.
  • the cover plate seen in plan view, advantageously covers a spray area directed against the roll gap of the roll stand.
  • the cover is expediently provided with a rolling stock catching or rolling stock guiding device directed against the rolling direction for the safe introduction of the rolling stock start into the rolling gap.
  • the catching or guiding device is advantageously formed by a sheet metal plate extending parallel to one of the axes of the rolls of the roll stand, in which at least one recess is provided for the passage of the liquid jets emerging from the rotor descaling device.
  • the recess is also advantageously designed in the form of a part of a circular ring.
  • a particularly important embodiment is characterized in that the roll stand is designed for rolling a cast strand, in particular a thin strand, the roll stand advantageously being integrated into a continuous casting installation.
  • the rolling device according to the invention allows the rotor descaling device to be arranged within the roll stand of the roll stand.
  • the rotor descaling device expediently has two or more rotor heads arranged approximately parallel to the axes of the rolls of the roll stand.
  • a transverse spraying device is provided in the immediate feed region of the rolls of the roll stand, preferably in the case of the presence of a spraying area cover plate, the transverse spraying device between the cover plate and the surface of the rolling stock is provided.
  • FIG. 1 illustrating a continuous casting installation with an integrated rolling device in a schematic illustration in a side view.
  • FIG. 2 shows a detail II of FIG. 1 on an enlarged scale according to a first embodiment.
  • FIG. 3 illustrates a second embodiment in a representation analogous to FIG. 2.
  • FIG. 4 is a view along line IV-IV of FIG. 3.
  • a cooled continuous casting mold which is designated by 1, is fed with liquid steel 2, which is fed from an intermediate vessel 3.
  • the cast strand 4 which forms in the mold 1 and has a liquid core and initially only a thin strand shell is diverted into the horizontal strand guide 7 via an arcuate strand support device 5 which is provided with closely adjacent support rollers 6.
  • the arcuate strand support device 5 and the first part of the horizontal strand guide 7 are surrounded by a cooling chamber 8, which contains the secondary cooling zone.
  • the cast strand (which has a thickness of approximately 60 mm) becomes a rolling device 9 (in which it is reduced to approximately 40 mm thickness), which is formed by a roll stand 10 and an upstream descaling device 11 , forwarded.
  • a separating device 12 is provided for separating the solidified and deformed cast strand 4 in slabs 13. If the cast strand 4 is processed into thin strip, the separation takes place according to the desired coil weight.
  • the separated slabs 13 are fed to a roller hearth furnace, not shown, in which the thin slabs are kept at the rolling temperature or, if appropriate, heated to this temperature, the roller hearth furnace also taking over the function of buffering the thin slabs for malfunctions. Rolling out to thin strip then takes place in a multi-stand finishing train, also not shown.
  • the descaling device 11 is arranged directly in front of the work rolls 14 of the roll stand 10, etc. in the area between the side walls 15 of the roller stand 16.
  • the descaling device 11 is designed as a rotor descaling device, the number of rotor heads 17 of the rotor descaling device 11 being selected according to the width of the cast strand 4. If a plurality of rotor heads 17 are provided, these are arranged side by side in a plane parallel to the axes 18 of the work rolls 14 of the roll stand 10 (cf. FIG. 4).
  • Each rotor head 17 has at least one rotating spray arm 19, which is preferably designed as a double spray arm 19 and extends radially and at the ends of which spray nozzles 20 are arranged.
  • a rotating plate can also be provided, on the circumference of which spray nozzles are arranged.
  • the axes 22 of the liquid jets 21 emerging from the spray nozzles 20 form an acute angle ⁇ with the rotor axis 23 of the associated rotor head 17.
  • the liquid jets 21 enter a housing 28 covering the surface 24 of the cast strand 4 in the region of the descaling device 11 immediately after exiting the spray nozzles 20 through an opening 27.
  • This housing 28 is provided with a shielding wall 29 opposite the roll gap 30 formed by the work rolls 14, so that almost no spray water can be whirled against the roll gap 30.
  • a transverse spray 31 is also provided, which makes it possible to remove any scale particles that may be swirling around.
  • the cross-spray 31 further reduces post-scaling due to reheating, which could possibly occur due to the very small amount of liquid that is applied by the rotor descaling device 11
  • the rotor heads 17 are arranged with rotor axes 23 arranged perpendicular to the surface 24 of the cast strand 4, as a result of which the liquid jets 21 extend over a partial area 32 of the liquid jets 21 Formed impact circle 33 would be directed against the roll gap 30.
  • a shield is provided in this area 32, which is formed by a cover plate 34 extending transversely across the surface 24 of the cast strand 4.
  • This cover plate 34 has a liquid drainage channel 35 which drains off the liquid collecting on this cover plate 34.
  • a catching and guiding device which is shown in dash-dotted lines in FIGS. 3 and 4, is provided according to a preferred embodiment, which is parallel to one the axes 18 of the work rolls 14 of the roll stand 10 extending sheet metal plate 34 'is formed.
  • This sheet metal plate 34 ' is integrated with the cover plate 34 and has recesses 36 in the form of a part of a circular ring for the passage of the liquid jets 21 emerging from the spray nozzles 20.
  • the number of spray nozzles 20 per rotor head 17 can be selected depending on the amount of liquid required.
  • the speed of the spray arms 19 is controlled as a function of the casting speed, that is to say as a function of the speed at which the casting strand 4 is drawn into the roll stand 10.
  • the liquid is preferably sprayed at a pressure between 200 and 500 bar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP19940890135 1993-08-23 1994-08-16 Installation de laminage Revoked EP0640413B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT169793A AT399833B (de) 1993-08-23 1993-08-23 Walzeinrichtung
AT1697/93 1993-08-23

Publications (2)

Publication Number Publication Date
EP0640413A1 true EP0640413A1 (fr) 1995-03-01
EP0640413B1 EP0640413B1 (fr) 1997-10-22

Family

ID=3519041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940890135 Revoked EP0640413B1 (fr) 1993-08-23 1994-08-16 Installation de laminage

Country Status (7)

Country Link
EP (1) EP0640413B1 (fr)
JP (1) JPH07148515A (fr)
AT (1) AT399833B (fr)
CZ (1) CZ202494A3 (fr)
DE (1) DE59404406D1 (fr)
PL (1) PL174348B1 (fr)
SK (1) SK280072B6 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997027955A1 (fr) * 1996-02-02 1997-08-07 Voest-Alpine Industrieanlagenbau Gmbh Procede pour le decalaminage d'une piece
DE102016219830A1 (de) 2016-10-12 2018-04-12 Sms Group Gmbh Vorrichtung und Verfahren zum Entzundern einer Bramme

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013224506A1 (de) * 2013-11-29 2015-06-03 Sms Siemag Ag Verfahren und Vorrichtung zum Entzundern einer metallischen Oberfläche sowie Anlage zum Herstellen von metallischen Halbzeugen

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE811831C (de) * 1948-10-02 1951-08-23 Sack Gmbh Maschf Spritzvorrichtung an Walzwerken
DE2165944B1 (de) * 1971-12-30 1972-08-31 Mannesmann AG, 4000 Düsseldorf Verfahren und Vorrichtung zum Entfernen von Zunderansätzen in Stranggießanlagen
EP0231877A2 (fr) * 1986-02-06 1987-08-12 Gebr. Bellmer GmbH & Co. KG Dispositif de nettoyage d'une bande sans fin
EP0241919A2 (fr) * 1986-04-14 1987-10-21 Hitachi, Ltd. Décalaminage d'une bande mince laminée à chaud
NL8900012A (nl) * 1989-01-04 1990-08-01 Hoogovens Groep Bv Werkwijze en sproeischijf voor het verwijderen van oxydehuid van een metalen werkstuk.
EP0489979A1 (fr) * 1988-05-17 1992-06-17 Stanley J. Walendowski Procédé et dispositif de nettoyage avec un jet d'eau
EP0586823A2 (fr) * 1992-07-31 1994-03-16 DANIELI & C. OFFICINE MECCANICHE S.p.A. Dispositif de décalaminage employant de l'eau
DE4328303A1 (de) * 1992-12-23 1994-06-30 Juergen Gaydoul Einrichtung zum Entzundern von warmem Walzgut
DE4302331A1 (de) * 1993-01-28 1994-08-04 Schloemann Siemag Ag Zunderwäscher

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3125146A1 (de) * 1981-06-26 1983-01-13 Woma-Apparatebau Wolfgang Maasberg & Co Gmbh, 4100 Duisburg Vorrichtung zum entzundern von heissen stahlbloecken
DE3624794A1 (de) * 1986-07-22 1988-02-04 Mannesmann Ag Einrichtung zum kontinuierlichen entzundern
US5001915A (en) * 1986-09-22 1991-03-26 David T. Blazevic Method for improving hot strip mill processing

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE811831C (de) * 1948-10-02 1951-08-23 Sack Gmbh Maschf Spritzvorrichtung an Walzwerken
DE2165944B1 (de) * 1971-12-30 1972-08-31 Mannesmann AG, 4000 Düsseldorf Verfahren und Vorrichtung zum Entfernen von Zunderansätzen in Stranggießanlagen
EP0231877A2 (fr) * 1986-02-06 1987-08-12 Gebr. Bellmer GmbH & Co. KG Dispositif de nettoyage d'une bande sans fin
EP0241919A2 (fr) * 1986-04-14 1987-10-21 Hitachi, Ltd. Décalaminage d'une bande mince laminée à chaud
EP0489979A1 (fr) * 1988-05-17 1992-06-17 Stanley J. Walendowski Procédé et dispositif de nettoyage avec un jet d'eau
NL8900012A (nl) * 1989-01-04 1990-08-01 Hoogovens Groep Bv Werkwijze en sproeischijf voor het verwijderen van oxydehuid van een metalen werkstuk.
EP0586823A2 (fr) * 1992-07-31 1994-03-16 DANIELI & C. OFFICINE MECCANICHE S.p.A. Dispositif de décalaminage employant de l'eau
DE4328303A1 (de) * 1992-12-23 1994-06-30 Juergen Gaydoul Einrichtung zum Entzundern von warmem Walzgut
DE4302331A1 (de) * 1993-01-28 1994-08-04 Schloemann Siemag Ag Zunderwäscher

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997027955A1 (fr) * 1996-02-02 1997-08-07 Voest-Alpine Industrieanlagenbau Gmbh Procede pour le decalaminage d'une piece
DE102016219830A1 (de) 2016-10-12 2018-04-12 Sms Group Gmbh Vorrichtung und Verfahren zum Entzundern einer Bramme
WO2018068985A1 (fr) 2016-10-12 2018-04-19 Sms Group Gmbh Dispositif et procédé de décalaminage d'une brame

Also Published As

Publication number Publication date
SK99694A3 (en) 1995-06-07
JPH07148515A (ja) 1995-06-13
PL174348B1 (pl) 1998-07-31
AT399833B (de) 1995-07-25
EP0640413B1 (fr) 1997-10-22
CZ202494A3 (en) 1995-11-15
ATA169793A (de) 1994-12-15
SK280072B6 (sk) 1999-07-12
PL304767A1 (en) 1995-03-06
DE59404406D1 (de) 1997-11-27

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