EP1521649B1 - Continuous casting plant with a deflecting device for metallic strips and deflecting method - Google Patents

Continuous casting plant with a deflecting device for metallic strips and deflecting method Download PDF

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Publication number
EP1521649B1
EP1521649B1 EP03735699A EP03735699A EP1521649B1 EP 1521649 B1 EP1521649 B1 EP 1521649B1 EP 03735699 A EP03735699 A EP 03735699A EP 03735699 A EP03735699 A EP 03735699A EP 1521649 B1 EP1521649 B1 EP 1521649B1
Authority
EP
European Patent Office
Prior art keywords
strip
casting
metallic strip
deflecting device
metallic
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
EP03735699A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1521649A1 (en
Inventor
Alfredo Poloni
Andrea De Luca
Nuredin Kapaj
Edi Faggiani
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.)
Danieli and C Officine Meccaniche SpA
Original Assignee
Danieli and C Officine Meccaniche SpA
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 Danieli and C Officine Meccaniche SpA filed Critical Danieli and C Officine Meccaniche SpA
Publication of EP1521649A1 publication Critical patent/EP1521649A1/en
Application granted granted Critical
Publication of EP1521649B1 publication Critical patent/EP1521649B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • B22D11/1282—Vertical casting and curving the cast stock to the horizontal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0637—Accessories therefor
    • B22D11/0694—Accessories therefor for peeling-off or removing the cast product

Definitions

  • the present invention refers to a continuous casting plant with a deflecting device for deflecting a metallic strip produced by continuous casting originating from the ingot mould of the plant.
  • the device is placed at the entrance of continuous transporters to send the strand to various stations including the casting line downstream of the ingot mould. A method for deflecting the strip is also described.
  • One of the technologies for the production of metallic strips consists in producing them starting from continuously cast ingots or slabs, which are successively reduced in thickness by a series of operations comprising breakdown, hot and cold rolling, together with further processing, for example thermal treatment.
  • the cast strip initially follows, a vertical stretch;
  • the rolling transporters downstream of the ingot mould generally follow trajectories which continue horizontally or along inclined planes.
  • a solution for deviating the casting head from its vertical trajectory is that described for example in the patent WO 0061320 : whereby an accurately shaped plate, hinged at one of its ends, turning around an axis parallel to the plane formed by the strip and transversally to the direction of advancement of the strip, raises and brings the free flap of cast strip to the entry of the rolling plane downstream of the ingot mould. After a sufficiently long stretch the strip is deposited onto the rolling plane, it is gripped by holding rolls and can move towards the downstream stations.
  • wastes chest a large container into which the wastes, or the metal strip cast ends which are detached from the rest of the casting, are made to fall a little after exit from the ingot mould; for example, they can deal with the initial casting tracts emerging from the ingot mould immediately after starting following a stoppage of the plant: In fact, these initial portions can have mechanical characteristics not corresponding to the casting specifications.
  • a problem at the heart of the present invention is to supply a continuous casting plant fitted with a device for the deflection of the metallic strips produced by continuous casting, which is reliable and adapts to the various types of continuous casting machines existing for the production of metallic strips, and which causes minimum hindrance in the area underneath the casting rolls.
  • a continuous metallic strip casting plant comprising:
  • the invention relates to a method for continuous casting of a metallic strip by means of a plant with the features above, comprising the following operations:
  • the deflecting device as above can be advantageously a mobile plate or flap of appropriate shape, supplied with appropriate moving means as described above.
  • Figures 1-4 show schematically four successive stages in the operating sequence of a plant according to a preferred aspect of the invention.
  • the continuous metallic strip casting plant of Figure 1 comprises an ingot mould 1 which comprises in turn a pair of rolls 2, 2', named also "counter rotating rolls” in the following description.
  • the rolls 2, 2' rotate around two axes parallel to each other in opposite rotating directions, the left roll in a clockwise direction and that on the right in anticlockwise direction with reference to the orientation in the figures.
  • the rolls 2, 2' are distanced apart so as to be separated at their point of minimal distance, by a slot through which the molten metal bath B exits downwards, cooling it and forming with a continuous casting operation the metallic strip N.
  • Reference 3 indicates a chamber filled preferably with inert gasses, to create a controlled atmosphere which avoids oxidation of the metal.
  • the metallic strip N is immersed In this chamber from its formation, on exit from the ingot mould.
  • the inert chamber 3 Underneath the inert chamber 3 there is placed a chest 4 for wastes inside which crop ends of the strip N are let fall when they are cut immediately -or almost immediately- downstream of the ingot mould 1, as can be seen in more detail in the following.
  • the wastes chest 4 receives also the melt still remaining in the ingot mould when the casting operation, for any reason, must be suspended or interrupted, by reciprocal distancing of the counter rotating rolls 2, 2'.
  • the inert chamber 3 has a side 7 from which the strip N emerges, continuously cast by the plant.
  • various strip processing devices which comprise guide rolls, schematically represented by a single cylinder 6, onto which the strip rests drawn by appropriate devices.
  • Figure 2 is a stage of the cast operation in the plant of Figure 1, in which a crop end 10 of metallic strip N has been sliced - or however detached by an appropriate device - from the remainder of the strand N.
  • Means for drawing the strip consists in varying shortly the speed of rotation of the rolls 2 in such a way to produce a thinning of the strip N immediately upon exit from the pair of rolls 2, so that the latter tears under its own weight, or the strip can be sliced by other known mechanical devices or other casting procedures.
  • This cutting operation is for example necessary upon starting the casting operation, or following an interruption of the casting operation for any reason, to eliminate the initial section of the new strand if this does not have the desired mechanical characteristics, as it often happens.
  • the tom crop end 10 can fall by gravity into the underlying wastes chest 3.
  • the mobile plate 5 is equipped with motorised means, as for example a hydraulic cylinder, able to impart a translational movement in a substantially horizontal direction to the plate bringing it in interference with the strip N, and deviating the latter from its vertical trajectory under the ingot mould 1. It brings the foremost end
  • the conveying means 6 can also comprise means for drawing the strip N towards the other processing stations, for example the rolling, cooling, winding and cutting stations.
  • Such means can be one or more pairs of drawing rolls. Initially, however the strip N is pushed forwards by the rotation of the casting rolls 2 and 2', whilst not being engaged by such means.
  • the mobile plate or flap 5 has preferably an appropriately arched shape so as to gradually deviate the strip N from an almost vertical direction to the substantially horizontal direction on the rolling pathway 6.
  • the mobile flap 5 for most of its upper surface corresponds to the surface of a circular cylinder.
  • the mobile flap 5 can be made to interfere with the cast strip N, to deflect it, with a purely translation movement.
  • the translation movement occurs according to a substantially horizontal rectilinear trajectory.
  • a sheer translation movement especially if horizontal, has the further advantage of reducing the relative frictional velocity between the strip and the flap, in the phase when the movement of the flap occurs towards the position of maximal interference.
  • Figure 3 shows the mobile flap 5 upon reaching the end position of its operational course: It is in a position such that the foremost area of the cast strip N has a curvature, obtained by a gradual displacement of the deflector.
  • the strip N at this stage is deviated from the initial line of vertical movement, or from the axis of casting, in a progressive manner.
  • the leading edge 9 of the flap is found at a height such that the strip N passes from the edge 9 to the roll conveyor 6 without violent or however dangerous curvatures.
  • the mobile flap 5 can move from the standby end position to the operative end position by moving along a route not necessarily rectilinear but alternatively curved, or along a rectilinear route not horizontally but inclined, where for example the position of the standby end position is located higher than the position than the operative end point, and the flap approaches the casting strip with a downward movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Wire Processing (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
EP03735699A 2002-07-10 2003-07-08 Continuous casting plant with a deflecting device for metallic strips and deflecting method Expired - Lifetime EP1521649B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI20021509 2002-07-10
IT2002MI001509A ITMI20021509A1 (it) 2002-07-10 2002-07-10 Impianto e metodo di colata continua con dispositivo deflettore per nastri metallici
PCT/EP2003/007301 WO2004007112A1 (en) 2002-07-10 2003-07-08 Continuous casting plant with a deflecting device for metallic strips and deflecting method

Publications (2)

Publication Number Publication Date
EP1521649A1 EP1521649A1 (en) 2005-04-13
EP1521649B1 true EP1521649B1 (en) 2008-01-09

Family

ID=11450170

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03735699A Expired - Lifetime EP1521649B1 (en) 2002-07-10 2003-07-08 Continuous casting plant with a deflecting device for metallic strips and deflecting method

Country Status (8)

Country Link
US (1) US20050236134A1 (it)
EP (1) EP1521649B1 (it)
CN (1) CN1665619A (it)
AT (1) ATE383213T1 (it)
AU (1) AU2003238068A1 (it)
DE (1) DE60318577D1 (it)
IT (1) ITMI20021509A1 (it)
WO (1) WO2004007112A1 (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT412539B (de) * 2003-05-06 2005-04-25 Voest Alpine Ind Anlagen Zweiwalzengiesseinrichtung
US8826966B1 (en) * 2009-12-21 2014-09-09 Iowa State University Research Foundation, Inc. Melt containment member
CN102294450A (zh) * 2010-06-25 2011-12-28 宝山钢铁股份有限公司 一种薄带连铸断带后保持连续浇铸的方法
CN112157232B (zh) * 2020-09-16 2021-10-19 东北大学 一种多弧度导卫板

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB980420A (en) * 1963-01-08 1965-01-13 United Steel Companies Ltd Continuous casting machines
BE789204A (fr) * 1971-10-01 1973-03-22 Uss Eng & Consult Procede et appareil pour utiliser une barre d'amorcage rigide dans un dispositif de cintrage fixe
JPS60221103A (ja) * 1984-04-17 1985-11-05 Ishikawajima Harima Heavy Ind Co Ltd 鋳造圧延設備
JP3016645B2 (ja) * 1991-11-27 2000-03-06 新日本製鐵株式会社 双ロール連続鋳造装置
DE19637545B4 (de) * 1996-09-14 2007-10-18 Sms Demag Ag Vorrichtung zur Umleitung eines in einer Stranggießkokille gegossenen Dünnbrammenstranges aus der Vertikalen in eine horizontale Ausförderrichtung
AT406026B (de) * 1998-03-25 2000-01-25 Voest Alpine Ind Anlagen Stranggiessanlage zum kontinuierlichen giessen eines dünnen bandes sowie verfahren hierzu
AUPP964499A0 (en) * 1999-04-08 1999-04-29 Bhp Steel (Jla) Pty Limited Casting strip

Also Published As

Publication number Publication date
ITMI20021509A0 (it) 2002-07-10
ITMI20021509A1 (it) 2004-01-12
AU2003238068A1 (en) 2004-02-02
US20050236134A1 (en) 2005-10-27
CN1665619A (zh) 2005-09-07
ATE383213T1 (de) 2008-01-15
WO2004007112A1 (en) 2004-01-22
DE60318577D1 (de) 2008-02-21
EP1521649A1 (en) 2005-04-13

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