EP3623074A1 - Procédé de fabrication au voisinage des dimensions définitives de produits oblongs ainsi qu'installation de laminage de coulée continue destinée à la mise en uvre dudit procédé - Google Patents

Procédé de fabrication au voisinage des dimensions définitives de produits oblongs ainsi qu'installation de laminage de coulée continue destinée à la mise en uvre dudit procédé Download PDF

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Publication number
EP3623074A1
EP3623074A1 EP18194156.8A EP18194156A EP3623074A1 EP 3623074 A1 EP3623074 A1 EP 3623074A1 EP 18194156 A EP18194156 A EP 18194156A EP 3623074 A1 EP3623074 A1 EP 3623074A1
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EP
European Patent Office
Prior art keywords
casting
rolling
strands
strand
rollers
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.)
Pending
Application number
EP18194156.8A
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German (de)
English (en)
Inventor
Erfindernennung liegt noch nicht vor Die
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.)
SMS Concast AG
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SMS Concast AG
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 SMS Concast AG filed Critical SMS Concast AG
Priority to EP18194156.8A priority Critical patent/EP3623074A1/fr
Publication of EP3623074A1 publication Critical patent/EP3623074A1/fr
Pending legal-status Critical Current

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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
    • B22D11/009—Continuous casting of metals, i.e. casting in indefinite lengths of work of special cross-section, e.g. I-beams, U-profiles
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds 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
    • 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

Definitions

  • the invention relates to a method for the production of long products in particular according to the preamble of claim 1 or 2, and a casting and rolling system for carrying out the method according to the preamble of claim 7.
  • a steel mill according to the publication EP-A-3 052 259 comprises a continuous casting machine and a rolling mill, which is arranged in direct succession to the continuous casting machine.
  • the latter is with at least two casting lines and the rolling mill is equipped with at least two separate rolling lines and, accordingly, separate rolling stands, which are arranged adjacent to one another along corresponding working directions, the installation comprising at least one single feed device, for example a distributor trough.
  • a transfer path for the casting strands to the rolling mill is assigned, by means of which each of the casting lines is connected to a corresponding rolling line.
  • the object of the invention is to further develop a process for the production of long products or to improve this generic continuous casting installation and the associated rolling mill in such a way that a cost reduction in the casting operation and the rolling mill is achieved.
  • this method according to the invention a direct feeding of uncut casting strands into a subsequent rolling mill and the casting and rolling close to the final dimensions are achieved in a compact casting and rolling plant.
  • this compact casting and rolling system can also be operated with two or more casting strands which are fed directly into a two-core or multi-core compact rolling mill and rolled out to the corresponding finished cross-section.
  • the pouring system is also equipped with special facilities for pouring the pouring jet into the mold to enable a higher pouring speed.
  • the casting and rolling system can be built much smaller than conventional systems.
  • An energetic analysis shows that if a casting format is divided into two smaller casting formats and these formats are rolled at the same time in only one rolling mill, the necessary forming work can be reduced compared to the throughput-equivalent single-strand operation with a larger casting format. With this division into smaller formats, a further cost advantage is achieved through the significantly shorter construction.
  • the rolling mill is very simplified, in that, in contrast to conventional billets or casting strands with dimensions of 130 x 130 mm or 150 x 150 mm, one or two or more casting strands cast close to the final dimensions directly, i.e. without dividing them, into a compact rolling mill fed and rolled out to the corresponding finished dimensions.
  • the casting strand which is cast close to the final dimensions, has a cross-sectional dimension, in particular of less than 100 x 100 mm; preferably dimensions between 50 x 50mm and 80 x 80mm. This makes it possible to save several rolling steps and to dispense with a conventional roughing mill.
  • the at least two casting strands running next to one another are fed into the rolling mill with a narrowing distance from one another in such a way that these at least two casting strands are rolled together in the same roll stand with a pair of rollers.
  • the pairs of rollers each form at least two calibrated openings on the outer surface of their rollers for a continuous strand. This means that, as in known rolling mills, it is not necessary to provide two rolling trains running independently of one another, but one rolling train can be used for a plurality of strands cast next to one another.
  • the casting strands are very advantageously rotated by a predetermined angle before entering the first pair of rolls of the rolling mill. This results in an optimal alignment of the strands for the rolling, in which the rollers of the pairs of rollers for receiving the twisted casting strands are each provided with an adapted, calibrated opening with a corresponding cross section.
  • FIG. 1 and 2 show a casting and rolling system 10 for the production of long metal products 13, 14, in particular steel products.
  • the long products 13, 14 produced have a rectangular, square, polygonal or round cross-sectional profile as required.
  • This continuous caster 10 is primarily suitable for the casting of billets with smaller formats between 50 x 50 mm and 120 x 120 mm, typically of 80 x 80 mm. It is poured at relatively fast casting speeds in the range from 4 to 12 m / min, preferably 5 to 8 m / min. Of course, other formats would also be suitable.
  • the casting and rolling system 10 comprises a continuous casting machine 20 with two adjacent casting strand lines for casting strands 11, 12 and a subsequent rolling mill 30 with a number of rolling stands 31, 32 arranged one behind the other, with pairs of rollers 33, 34, through which these casting strands 11, 12 are rolled into these long products 13, 14.
  • a continuous casting machine 20 with the two continuous casting lines running side by side is constructed per se in a conventional manner and is therefore not explained in detail below.
  • a vessel 15 containing molten metal which is a distributor vessel, is provided with a spout for each continuous casting line, a control element 16 adjoining the spout, preferably a slide closure or stopper, and a pouring jet protection 17.
  • a water-cooled mold 21 is arranged below the pouring spout or this pouring jet protection 17 and forms a cavity which is formed with a cross section corresponding to the format of the strand produced to be cast.
  • the casting strands are assigned guide and support rollers 22 and pairs of straightening and support rollers 24, so that the casting strands 11, 12 guided through them are bent from the vertical with a radius, for example between 4 and 12 meters, and subsequently in an approximately horizontal direction along a horizontal one Level 25 are extendable to the rolling mill 30.
  • a cutting device 26 for separating the casting strands 11, 12 and a heating device, for example an inductive heating unit, are indicated after the guide and straightening rollers 24.
  • the heating device could be dispensed with.
  • the rolling mill 30 consists of a number of rolling stands 31, 32 arranged one behind the other, each of which is equipped with rotating roller pairs 33, 34.
  • This number of roll stands 31, 32 is usually between 12 and 18 stands. It comes with every rolling unit a reduction in the strand cross-section to the desired extent of the resulting long product 13, 14 causes.
  • this casting which is close to the final dimensions, means that a so-called roughing road with a number of roll stands can be dispensed with.
  • the two casting strands 11, 12 running next to one another are fed into the rolling mill 30 with a narrowing distance a such that these at least two casting strands 11, 12 are rolled by only one pair of rolls 33, 34 of the number of roll stands 31, 32 become.
  • This distance a to be narrowed can be reduced, for example, from 800 mm to a distance a 'of 300 mm.
  • a feed device 29 is advantageously provided for the at least two continuous casting line lines, by means of which the casting line 11, 12, in particular when it is transferred directly from the casting to the rolling mill 30, by a certain angle inwards and after a certain distance by the same angle the casting or rolling direction are bent. This can be done, for example, by support and straightening rollers, which act laterally on the strands.
  • a twisting device 23 for the casting strands 11, 12 in front of the first pair of rolls 31 of the rolling installation can be provided for each casting strand line, by means of which the casting strands can each be rotated by a predetermined angle.
  • Such a twisting device 23 can also be composed of support and straightening rollers.
  • the Casting strands 11, 12 are of the in Fig. 3 shown position, in which they are arranged with respect to the horizontal plane 25 with their outer surfaces parallel or perpendicular thereto, rotated 45 ° in the longitudinal direction in their axis, so that they are then with their diagonals in this horizontal plane 25, as this in Fig. 4 is shown.
  • the feed device 29 and the twisting device 23 can also be combined into one unit, so that the two casting strands 11 and 12 leave the feed device already twisted by a certain angle.
  • guide and straightening rollers 24 are provided on a holder 27 in a conventional manner in the casting strand lines, through which the casting strands 11, 12 are positively guided, at least on their upper and lower sides.
  • Fig. 4 form the pairs of rollers 33, 34 which can be rotated via drives 37, 38 accordingly at least two calibrating openings 35, 36 on the outer jacket of their rollers 33, 34 for receiving one continuous strand 11, 12, respectively.
  • the respective openings 35, 36 are provided with annular grooves in the Rollers formed, each having a triangular, rounded or other cross-section.
  • the continuous casting machine 20 has a control device (not shown in more detail) for controlling or regulating during the casting.
  • Corresponding measuring means for the strands for determining the take-off speeds or for the strand profiles are arranged in such a way that their measurement results are evaluated by the control device and corrections are made if the two strands differ from one another. Sufficient withdrawal speeds of the casting strands 11, 12 are thus achieved ensured up to the rolling mill 30.
  • the rolling speed is advantageously determined by the take-off speed.
  • At least one control or regulating device for the rolling speeds in the rolling mill 30 in conjunction with the casting speeds of the casting strands. These speeds are coordinated with each other.
  • the continuous casting machine 20 can continue to pour and the casting strands 11, 12 can be cut into definable lengths by means of the cutting device 26. Then there can be one in Fig. 2 indicated evacuation device 19 are activated to remove the cut strand sections. This is advantageously arranged in such a way that if the rolling mill fails, the cut strand sections 11 ', 12' are no longer conveyed into the feed device 29, but rather transversely thereto.
  • the cutting heads 26 can be used to cut off the strand heads at the start of casting and the ends of the strand after the end of casting.
  • a removal device for the rolling stock. This is advantageously carried out in such a way that a cutting device cuts the rolling stock to the final length of the rolling bars and these are then transported to a cooling bed for cooling and then bundled.
  • the respective pouring tube 17 ends when casting with its lower end above the bath level of the molten metal in the mold, preferably 20 to 50 mm, and thus does not dip into the bath in the mold.
  • a flushing device not shown, for the supply of inert gas, such as argon or nitrogen, can be provided, as a result of which the pouring jet can be surrounded by protective gas.
  • a sealing gas screen surrounds the melt jet emerging from the pouring tube and flowing into the mold.
  • the metal supply from the distributor into the mold can be regulated with sufficient precision, as in the known closed casting, via an actuator, at the same time an inadmissible fanning out of the pouring jet subject to the regulation is prevented by the pouring tube.
  • An advantage of the invention is the use of a rolling train which is connected to one or more, usually two, casting lines.
  • the inlet cross-section only has to be half as large for the same throughput of the rolling mill (at the same casting speed). This leads to significant advantages in the rolling process, in which considerable forming work can be saved in the rolling mill due to the casting cross-section which is closer to the final dimensions, and the number of roll stands required can be considerably reduced with the same throughput.
  • the relatively low rolling speed in relation to the cross section of the respective strand also allows the degree of deformation per rolling stand to be increased, and thus the number of rolling stands to be reduced.
  • the invention is adequately demonstrated with the illustrated exemplary embodiments. Of course, it could be illustrated by other variants.
  • the spacing of the casting strands to be narrowed according to the invention could also be implemented in such a way that the one strand would be directed straight to the pair of rollers and only the other strand would be narrowed correspondingly more apart and these would then be guided together to the pairs of rollers. In theory, they could also be routed parallel to the rolling mill.
  • the continuous casting lines can also be divided into two parallel, independent groups of rolling stands.
  • the rolling speeds which are considerably increased due to the already greatly reduced rolling cross section, can be controlled independently of one another in sections, and on the other hand, different finished dimensions can be rolled on the two lines.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP18194156.8A 2018-09-13 2018-09-13 Procédé de fabrication au voisinage des dimensions définitives de produits oblongs ainsi qu'installation de laminage de coulée continue destinée à la mise en uvre dudit procédé Pending EP3623074A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18194156.8A EP3623074A1 (fr) 2018-09-13 2018-09-13 Procédé de fabrication au voisinage des dimensions définitives de produits oblongs ainsi qu'installation de laminage de coulée continue destinée à la mise en uvre dudit procédé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18194156.8A EP3623074A1 (fr) 2018-09-13 2018-09-13 Procédé de fabrication au voisinage des dimensions définitives de produits oblongs ainsi qu'installation de laminage de coulée continue destinée à la mise en uvre dudit procédé

Publications (1)

Publication Number Publication Date
EP3623074A1 true EP3623074A1 (fr) 2020-03-18

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EP18194156.8A Pending EP3623074A1 (fr) 2018-09-13 2018-09-13 Procédé de fabrication au voisinage des dimensions définitives de produits oblongs ainsi qu'installation de laminage de coulée continue destinée à la mise en uvre dudit procédé

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113857446A (zh) * 2021-09-28 2021-12-31 张明 结晶器熔体分配和换热分离的金属铸连轧方法及设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5594768A (en) * 1979-01-16 1980-07-18 Hitachi Ltd Molten metal pouring device of continuous casting machine
JPS5994501A (ja) * 1982-11-24 1984-05-31 Kawasaki Steel Corp 超長尺条鋼の圧延安定化方法と圧延施設
JPS62259649A (ja) * 1986-05-02 1987-11-12 Nippon Kokan Kk <Nkk> 小断面鋳片の連続鋳造装置
DE19639299A1 (de) * 1996-09-25 1998-03-26 Schloemann Siemag Ag Verfahren und Vorrichtung zur Herstellung eines Vielant- oder Profil-Formats in einer Stranggießanlage
WO2007010565A1 (fr) * 2005-07-19 2007-01-25 Giovanni Arvedi Processus et installation afferente pour fabriquer des produits allonges en acier sans interruption
EP3052259A1 (fr) 2013-10-04 2016-08-10 Danieli & C. Officine Meccaniche, S.p.A. Installation de production d'acier à l'aide de line de co-laminage multiple et procédé de production correspondant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5594768A (en) * 1979-01-16 1980-07-18 Hitachi Ltd Molten metal pouring device of continuous casting machine
JPS5994501A (ja) * 1982-11-24 1984-05-31 Kawasaki Steel Corp 超長尺条鋼の圧延安定化方法と圧延施設
JPS62259649A (ja) * 1986-05-02 1987-11-12 Nippon Kokan Kk <Nkk> 小断面鋳片の連続鋳造装置
DE19639299A1 (de) * 1996-09-25 1998-03-26 Schloemann Siemag Ag Verfahren und Vorrichtung zur Herstellung eines Vielant- oder Profil-Formats in einer Stranggießanlage
WO2007010565A1 (fr) * 2005-07-19 2007-01-25 Giovanni Arvedi Processus et installation afferente pour fabriquer des produits allonges en acier sans interruption
EP3052259A1 (fr) 2013-10-04 2016-08-10 Danieli & C. Officine Meccaniche, S.p.A. Installation de production d'acier à l'aide de line de co-laminage multiple et procédé de production correspondant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113857446A (zh) * 2021-09-28 2021-12-31 张明 结晶器熔体分配和换热分离的金属铸连轧方法及设备

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