EP3600721B1 - Anlage und verfahren zum semi-kontinuierlichen stranggiessen von blocksträngen - Google Patents

Anlage und verfahren zum semi-kontinuierlichen stranggiessen von blocksträngen Download PDF

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Publication number
EP3600721B1
EP3600721B1 EP18720106.6A EP18720106A EP3600721B1 EP 3600721 B1 EP3600721 B1 EP 3600721B1 EP 18720106 A EP18720106 A EP 18720106A EP 3600721 B1 EP3600721 B1 EP 3600721B1
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EP
European Patent Office
Prior art keywords
strand
slab
caster
mould
pivotable
Prior art date
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Active
Application number
EP18720106.6A
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German (de)
English (en)
French (fr)
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EP3600721A1 (de
Inventor
Adolf Gustav Zajber
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Primetals Technologies Austria GmbH
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Primetals Technologies Austria GmbH
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    • 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
    • B22D11/14—Plants for continuous casting
    • B22D11/141—Plants for continuous casting for vertical casting
    • 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
    • B22D11/14—Plants for continuous casting
    • B22D11/147—Multi-strand plants
    • 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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/114—Treating the molten metal by using agitating or vibrating means
    • B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
    • 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
    • B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
    • 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
    • B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields
    • 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
    • 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
    • B22D11/1281—Vertical removing

Definitions

  • the present invention relates on the one hand to a plant for the semi-continuous continuous casting of billets with a single or multi-strand first casting plant for continuous casting of at least one first billet and a single or multi-strand second casting plant for continuous casting of at least one second billet.
  • the invention relates to a method for semi-continuous continuous casting of billets in a plant, comprising a single or multi-strand first casting plant for continuously casting at least one first billet and a single or multi-strand second casting plant for continuously casting at least one second billet.
  • WO 2016/131437 A2 a method and a system for producing steel strands is known.
  • the hot strand is guided vertically down from the mold by means of a cold strand into a support segment with strand support rollers and then brought into a downstream vertical strand guide area in which the hot strand is cooled.
  • the hot strand is grasped with the aid of a transport trolley and extended to the side.
  • a semi-continuous continuous caster for steel strands is known.
  • the steel strand is supported and guided by the mold in a secondary cooling system and then conveyed on to a tertiary cooling zone.
  • the cooled strand is conveyed laterally out of the tertiary cooling zone.
  • the cast strand can, for example, be placed on a pedestal, with the pedestal and the strand being able to be moved to a further tertiary cooling zone.
  • the tertiary cooling zone can have two brackets that support the strand laterally.
  • the strand can be swiveled out in relation to the vertical, with the strand resting on the bracket.
  • the strand can be placed on a roller table via a swivel drive, via which it can be removed.
  • the object of the present invention is to increase the safety of systems for the semi-continuous continuous casting of ingot strands and, in particular, to simplify the solidification and the subsequent conveying out of the ingot strands. Nevertheless, the system should have a high productivity.
  • the plant according to the invention has at least one single or multi-strand first casting plant for semi-continuous continuous casting of at least one first block strand and one single or multi-strand second casting plant for semi-continuous continuous casting of at least one second block strand.
  • the first casting system is an n-string system and the second casting system is an m-string system, with n ⁇ 1,2,3 ... and m ⁇ 1,2,3 .... So, for example
  • the first casting plant can be a two-strand system and the second casting system can be a single-strand system.
  • the molds of these casting systems are supplied with molten steel by a movable ladle or a movable tundish.
  • the casting systems are supplied with molten steel through a movable distribution channel.
  • the casting speed of each casting system can be controlled or regulated separately, e.g. by means of a slide valve or a stopper.
  • a round block strand with a first diameter is cast on the first strand of the first casting plant
  • a round block strand with a second diameter is cast on the second strand of the first casting plant
  • a rectangular block strand is cast on the single strand of the second casting plant.
  • Each strand of the two casting plants has at least one mold with an oscillator, a first segment, a swiveling strand guide, insulating flaps and a cold strand pull-out system.
  • a partially solid block strand is formed from the molten steel.
  • the adherence of the strand shell of the Block strand to the mold is prevented by an oscillator.
  • the mold is followed in the casting direction by a first segment for supporting and guiding the partially solidified billet.
  • the block strand which has a thin strand shell, is supported and guided by strand guiding devices (for example strand guiding rollers) and preferably further cooled by spray nozzles of a secondary cooling system.
  • the pivotable strand guide has a strand guide frame and one or preferably more strand guide sections, wherein a strand guide section has at least one strand guide device for supporting and guiding the partially or completely solidified block strand and the pivotable strand guide for conveying the block strand out of the casting plant can be pivoted about an axis of rotation.
  • the swiveling strand guide into the casting plant only to convey out the "self-supporting" block strand.
  • the block strand is supported on the cold strand or on the cold strand pull-out system.
  • the cooling of the block strand can be controlled or regulated by means of insulating flaps, which are arranged either on the swiveling strand guide, e.g. the strand guide frame, or the stationary system support frame (mostly technological steel frame or STAKO for short).
  • the cold strand pull-out system is used to pull the cold strand and the subsequent hot strand out of the mold and to support the ingot.
  • the strand is supported by the cold strand or the cold strand extraction system until it has completely solidified and is only then conveyed out. This means that the system can be operated much more safely. Due to the flexible configuration of the n-strand first casting plant and the m-strand second casting plant, the production output can easily be increased if necessary, for example by increasing the number of strands in the first or second casting plant.
  • the pivotable strand guide has a horizontal axis of rotation for tilting and conveying the block strand essentially transversely to the casting direction.
  • the block strand can be conveyed out, for example, by tilting the strand guide frontally or to the side by 90 °.
  • the pivotable strand guide can have a vertical axis of rotation for pivoting out and conveying out the block strand in the casting direction.
  • Block strands that are very variable in size can be held particularly securely if one strand guide roller can be adjusted to the block strand by a linear movement and two further strand guide rollers by pivoting two guide levers.
  • a drive can pivot the insulating flaps about a vertical axis of rotation and, in the closed position, the insulating flaps enclose the string of blocks, preferably completely or essentially completely.
  • molten steel is poured into the mold through a movable tundish or pouring ladle.
  • the movable tundish can sequentially supply the first and second casting systems with molten steel. This feature dramatically lowers costs because the cost of delivering the single mailing list is significantly lower.
  • a billet billet is stirred electromagnetically in the mold and / or during the thermal insulation of the billet billet.
  • a strand agitator is moved into the area of the opened insulating flaps and the strand agitator then electromagnetically stirs the block strand.
  • the strand stirrer is moved out of the area of the open insulating flaps and then afterwards the insulating flaps are closed again or at least partially closed again.
  • the block strand end is at least partially heated by a so-called "hot topping" treatment during the thermal insulation of the block strand.
  • a powder e.g. an exothermic powder
  • the end of the block strand is thermally insulated by the powder and, optionally, by a cap enveloping the strand head. After the block strand has solidified, the cap can be removed again and, if necessary, reused. If necessary, the end of the block strand can also be removed, e.g. outside the system.
  • the Fig 1 shows the simplest form of a system according to the invention for the semi-continuous continuous casting of billets B1, B2 with a single-strand first casting plant GA1 for continuously casting at least one first billet B1 and a single-strand second casting plant GA2 for continuously casting at least one second billet B2.
  • the molds 3 of both casting systems are supplied with molten steel via a casting ladle 1 and a movable tundish 2.
  • the strands of both casting plants GA1, GA2 are essentially constructed identically.
  • a partially solidified block strand B1, B2 with a thin strand shell is formed in the mold 3.
  • the adherence of the strand shell of the respective block strand B1, B2 to the copper plates of the mold 3 is prevented by an oscillator 4.
  • the Partially solidified block strand B1, B2 is pulled out by the cold strand pull-out system with the cold strand cross member 20, the drive 21 and the sprocket 22.
  • the block strand could also be pulled out by a hydraulic cylinder carrying the cold strand 19.
  • a first segment 5 with strand guide rollers 9 (see Fig 2 ) arranged to support and guide the respective block strand B1, B2.
  • the Fig 2 shows the section AA of the strand guide 6 which can be frontally tilted forwards (the tilting direction is shown by an arrow).
  • the block strand B2 is supported in a strand guide section 8 by three strand guide rollers 9.
  • the middle strand guide roller 9 is employed by a hydraulic cylinder 13; the two outer strand guide rollers 9 are each adjusted by a hydraulic cylinder 13 via guide levers 12.
  • spindle drives or the like could also be used.
  • the adjustable thermal insulation of the block strand B2 in a strand guide section 8 is carried out by two insulating flaps 11, which can be opened and closed by a drive. The insulating flaps 11 are not pivoted when the block strand B2 is conveyed out and remain on the system support frame 10.
  • Fig 1 the pivotable strand guide 6 with the strand guide frame 7 and several strand guide sections 8 is also shown.
  • the pivotable strand guide 6 has a horizontal axis of rotation DA and can be tilted by 90 ° by the hydraulic cylinder 13.
  • the block strand is then conveyed out transversely to the casting direction (see Fig 1 , Side elevation).
  • step a shown on the far left, the molds were 3 of the two Casting systems GA1, GA2 already sealed by a cold strand 19, for example in the casting direction by "top feeding” or counter to the casting direction by "bottom feeding”, and the tundish 2 or the casting ladle 1 is located above the first casting system GA1.
  • step b After the pouring of molten steel into the mold 3 of the first casting installation GA1 has started (step b), for example by lifting a plug in the tundish 2, a mold level forms in the mold.
  • step c the block strand B1 has reached its target length or its target weight and the pouring of molten steel was stopped.
  • the block strand B1 is still pulled out of the mold 3, at least until the upper end of the block strand B1 (also called the block strand end) has reached an upper end of the pivotable strand guide 6 (step e).
  • the partially solidified block strand B1 is then cooled in a controlled or regulated manner by insulating flaps 11 until it has completely solidified and is then conveyed out by means of the pivotable strand guide 6.
  • the block strand B1 is supported on the cold strand 19.
  • the conveyance of the solidified first block strand B1 from the first casting plant GA1 - step f - is in the Fig 7 and 8th not explicitly shown, here, for example, the Fig 1 with the position of the pivotable strand guide 6 and the strand guide frame 7 shown in dashed lines, as well as on the Fig 2, 3 (direction of arrow) and Fig 5 referenced.
  • first block strand B1 is not necessarily conveyed out of the first casting installation GA1 before the casting operation of the second casting installation GA2 is started.
  • the second casting plant GA2 takes place in Fig 7 no casting operation has yet taken place.
  • Fig 8 the casting ladle 1 or the tundish 2 was moved to the second casting installation GA2 in the direction of the arrow and is located above the mold 3 of the second casting installation GA2 (step g). It is immaterial here when the mold 3 was actually sealed. It is only essential that the mold is closed as soon as molten steel is poured in.
  • step h analogous to step b, molten steel is poured into the mold 3 of the second casting plant, then the second strand B2 is pulled out of the mold 3 of the second casting plant GA2, supported and guided in the first segment 5 and, if necessary, further cooled, the pouring of molten steel stopped (step i), the pulling out of the second block strand B2 stopped (step k) and then the second block strand B2 is thermally insulated by insulating flaps 11 until complete solidification.
  • the second block strand is conveyed out again by means of the pivotable strand guide 6.
  • the first casting installation GA1 as in FIG Fig 7 and 8th is single-stranded or, for example, two-stranded.
  • two molds would be supplied with melt through a longer distributor channel 2, so that, for example, two first ingot strands B1 are formed in parallel.
  • the Fig 3 shows the pivotable strand guide 6 of a two-strand casting plant with insulating flaps 11.
  • the first and the second block strand B1, B2 can each be pivoted out to the side, the arrows indicating the pivoting direction.
  • the system can be built very compact and, in particular, a short strand spacing 14 can be maintained.
  • the Fig 4 shows one to Fig 3 alternative arrangement of the strand guides 6, the strand spacing 14 between the first and second block strand B1, B2 is much larger than in Fig 3 .
  • the cold strand traverses 20 of the first and second casting systems GA1, GA2 are arranged collinearly, so that a larger strand spacing 14 results.
  • the block strands B1, B2 can each be swiveled forward; the insulating flaps 11 are each connected to the pivotable strand guide 6 of the first and second casting plants GA1, GA2.
  • strand guide 6 is shown with further details.
  • the circular block strand B1 shown in the left view with two different diameters is supported on the circumference by three strand guide rollers 9, one strand guide roller 9 being held by a linearly movable hydraulic cylinder 13 and two further strand guide rollers 9 each by a pivotable guide lever 12.
  • the insulating flaps 11 are pivoted in and out by a drive 23.
  • the Fig 5 shows the conveyance of a block strand B1 from the first casting plant GA1 by means of a pivotable strand guide 6.
  • the strand guide frame 7 of the pivotable strand guide 6 has a vertical axis of rotation DA, so that the block strand B1 with the strand guide rollers 9 holding it can be pivoted out.
  • the block strand B1 can either be taken directly from the pivotable strand guide 6 by a crane, the strand guide rollers 9 released and the block strand B1 transported away, or the block strand B1 is lowered by a further manipulator 18 and then conveyed out.
  • a side elevation of a system according to the invention is shown.
  • the cold strand 19 and the cold strand traverse 20 are driven via two drives 21 and associated spindles.
  • the distribution channel 2 with two plugs can supply a two-strand first casting plant GA1 and a single-strand second casting plant GA2.
  • the pivotable strand guide 6 with the strand guide frame 7 is pivoted via a hydraulic cylinder 13 (see arrow for the pivoting direction);
  • the strand guide frame 7 can be moved linearly in the swiveled-out state, so that the block strand B1 can easily be removed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP18720106.6A 2017-03-21 2018-03-20 Anlage und verfahren zum semi-kontinuierlichen stranggiessen von blocksträngen Active EP3600721B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102017002723 2017-03-21
DE102017004512 2017-05-11
PCT/EP2018/057023 WO2018172358A1 (de) 2017-03-21 2018-03-20 Anlage und verfahren zum semi-kontinuierlichen stranggiessen von blocksträngen

Publications (2)

Publication Number Publication Date
EP3600721A1 EP3600721A1 (de) 2020-02-05
EP3600721B1 true EP3600721B1 (de) 2021-05-05

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EP18720106.6A Active EP3600721B1 (de) 2017-03-21 2018-03-20 Anlage und verfahren zum semi-kontinuierlichen stranggiessen von blocksträngen

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EP (1) EP3600721B1 (ko)
KR (1) KR20190126333A (ko)
WO (1) WO2018172358A1 (ko)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT522265B1 (de) * 2019-03-06 2021-12-15 Primetals Technologies Austria GmbH Umbau einer stranggiessanlage für knüppel- oder vorblockstränge
CN115194111B (zh) * 2022-07-21 2024-04-30 武汉大西洋连铸设备工程有限责任公司 一种大圆坯至特大圆坯半连铸垂直浇铸工艺与设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3027789A1 (de) 1980-07-23 1982-02-18 Schloemann-Siemag AG, 4000 Düsseldorf Vertikalstranggiessanlage
DE3542518A1 (de) 1985-12-02 1987-06-04 Mannesmann Ag Einrichtung zum senkrechten, diskontinuierlichen stranggiessen von metallen, insbesondere von stahl
KR101149373B1 (ko) 2009-12-24 2012-05-30 주식회사 포스코 수직형 주조 장치 및 이를 이용한 주조 방법
EP3122492B2 (de) 2014-03-27 2020-06-10 Primetals Technologies Austria GmbH Semi-kontinuierliches stranggiessen eines stahlstrangs

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2042546A1 (en) * 1970-08-27 1972-03-02 Zentralnyj nautschno lssledowatelskij Institut tschernoj metallurgn lmenti I P Bardina, Moskau Reduction of cooling of continuous castings - in secondary cooling zo
DE3621234A1 (de) * 1986-06-25 1988-01-21 Thyssen Edelstahlwerke Ag Senkrecht-giessanlage fuer strang-teillaengen
EP3259084A2 (de) * 2015-02-19 2017-12-27 Primetals Technologies Austria GmbH Verfahren und anlage zum erzeugen von stahlsträngen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3027789A1 (de) 1980-07-23 1982-02-18 Schloemann-Siemag AG, 4000 Düsseldorf Vertikalstranggiessanlage
DE3542518A1 (de) 1985-12-02 1987-06-04 Mannesmann Ag Einrichtung zum senkrechten, diskontinuierlichen stranggiessen von metallen, insbesondere von stahl
KR101149373B1 (ko) 2009-12-24 2012-05-30 주식회사 포스코 수직형 주조 장치 및 이를 이용한 주조 방법
EP3122492B2 (de) 2014-03-27 2020-06-10 Primetals Technologies Austria GmbH Semi-kontinuierliches stranggiessen eines stahlstrangs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KISHI MIKINE, ET AL: "CC 2 No Development of Large Cross-Section Bloom Casting Process", CHITA PLANT, 11 October 2006 (2006-10-11), pages 49 - 55, XP055888796, Retrieved from the Internet <URL:https://www.jstage.jst.go.jp/article/denkiseiko/78/1/78_1_49/_pdf> [retrieved on 20220208]

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WO2018172358A1 (de) 2018-09-27
KR20190126333A (ko) 2019-11-11
EP3600721A1 (de) 2020-02-05

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