EP3341142B1 - Procédé de fonctionnement d'une installation fonctionnant suivant le concept csp (compact strip production) - Google Patents

Procédé de fonctionnement d'une installation fonctionnant suivant le concept csp (compact strip production) Download PDF

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Publication number
EP3341142B1
EP3341142B1 EP16756979.7A EP16756979A EP3341142B1 EP 3341142 B1 EP3341142 B1 EP 3341142B1 EP 16756979 A EP16756979 A EP 16756979A EP 3341142 B1 EP3341142 B1 EP 3341142B1
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EP
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Prior art keywords
semi
millimetres
thickness
strip
rolling
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EP16756979.7A
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German (de)
English (en)
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EP3341142A1 (fr
Inventor
Dieter Rosenthal
Christoph Klein
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SMS Group GmbH
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SMS Group GmbH
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    • 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
    • B21B1/466—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 non-continuous process, i.e. the cast being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2201/00—Special rolling modes
    • B21B2201/08—Batch rolling
    • 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
    • B21B45/004—Heating the product

Definitions

  • the invention relates to a method for producing metal strips, preferably steel strips, with a thickness of 0.8 to 3.0 mm from previously cast thin slabs with a thickness of 40-140 mm, in batch or semi-endless operation.
  • the invention further relates to a method for operating such a system.
  • CSP-® stands for "Compact Strip Production”.
  • the liquid steel is cast into thin slabs, which are rolled out into thin strips in the tunnel mill without pre-rolling after temperature compensation in a tunnel kiln.
  • a CSP-® system Due to the direct connection of casting and rolling, a CSP-® system is characterized by a particularly low energy consumption - compared to conventional hot strip mills, up to 40% energy can be saved. Since the CSP-® system concept does not require a roughing stand to pre-roll the thin slab, the investment costs are also reduced.
  • a hot strip produced on a CSP-® system is characterized by high quality, it has a uniform structure and homogeneous mechanical-physical properties over the entire strip length and width. The belt geometry is within the narrowest tolerances.
  • the invention relates to a system which can be operated both in batch mode and in semi-endless mode, in particular can be switched between these modes.
  • batch operation as a mode of operation of the plant in which the thin slab emerging from the casting machine, depending on the thickness and even before entering the downstream tunnel kiln, is shortened to such a length that, after leaving the rolling device, a in the downstream coiler device Coil can be wound with a predetermined length and weight.
  • batch operation exactly one coil is generated from each individual slab.
  • the person skilled in the art names a mode of operation of such a system, in which the thin slab is cut after leaving the casting machine in such a way that a so-called jumbo slab is produced, the length of which usually corresponds to an integral multiple of a slab from batch operation. From such a jumbo slab, which is also introduced into the tunnel furnace after it emerges from the casting machine, a thin strip is then rolled out in the subsequent rolling process, which is cut to the respective coil weights and lengths by means of flying shears after leaving the rolling device.
  • Systems of this type are used to produce thin strips of different thicknesses and different steel grades from low-carbon steel to advanced high-strength steel grades.
  • Plants for the production of thin metallic strips from thin cast slabs have been known to the person skilled in the art for many years. The same applies to the CSP ® plant concept.
  • the EP 2 195 124 B1 a compact and flexible CSP-® system for endless, semi-endless and batch operation.
  • the system described here is designed in such a way that it can be operated in all three possible operating modes for such system types, two batching machines usually being provided in front of the rolling device for batch operation and a pair of scissors being arranged between the casting machine and the rolling device to be able to start rolling independently of the casting speed for the thin slab.
  • a furnace length is again required that allows the generation of a jumbo slab, thus a furnace length that is longer than a single slab from the batch operation.
  • the endless operation of such a system requires the arrangement of a heating device, in particular an inductive heating device, in the region of the roll direction, often between the individual roll stands or at least between groups of roll stands.
  • WO 2011/141790 A2 a process and a plant for the production of flat rolled products, which also implements the CSP plant concept. Under certain conditions, this system also switches between all three operating modes mentioned above.
  • semi-endless operation can be used when the rolling device is warm from operation and a final thickness in the target area of the minimum final thickness has already been reached in batch operation.
  • the first final thickness in semi-endless operation preferably corresponds to the last final thickness in batch operation, the minimum being subsequently achieved by means of a setting of at least the roll gap of a roll stand, preferably a plurality of roll nips of the roll stands of the rolling device, by means of so-called "flying-gauge change" Final thickness is set and reached in the thin strip.
  • the strip is preferably separated into coils with flying shears arranged behind the rolling device, which is arranged in front of the reel device, in particular the underfloor reels usually used here.
  • the strip thickness changes during the rolling operation are carried out such that the strip head and the strip end are still within the thickness tolerances required by the market.
  • the invention thus provides a method with a correspondingly programmed control device which enables switching from batch mode to semi-endless mode, in which a part of a previously cast jumbo frame, preferably at least half of the jumbo frame, generates the minimum final thickness can be done without having to bring the hot strip to operating temperature under the influence of external energy; rather, the operating temperature of the installation according to the invention, in particular of its rolling stock, is set in batch operation or in semi-endless operation during the production of metal strips by selecting the correct rolling speed.
  • the method according to the invention thus allows the production of thin strips in the most energy-efficient operating mode using known system components and correspondingly controllable means with the lowest possible energy expenditure.
  • the method according to the invention is thus able to produce thin strips from a large number of steel grades both in batch operation and in semi-endless operation and in this case to produce particularly small thicknesses in an energy-efficient manner.
  • the batch mode is principally used for larger final thicknesses and the semi-endless mode for thinner or thinner ones Final thicknesses selected, whereby the plant can achieve a total output of approx. 4 million tons per year in two-strand operation, thus using two casting machines arranged in parallel.
  • the rolling device has two groups of in each case a plurality of roll stands, in particular a first group with two roll stands and a second group with up to five roll stands arranged downstream of the first group.
  • An induction heater can be arranged between these groups of roll stands, which is preferably provided such that it can be moved out of the rolling device and the entire rolling line. While induction heating in batch mode is not regularly used, the induction heating in semi-endless mode, in particular in the production of thin and thinnest final thicknesses of the metal strip by the rolling device, can be used to structure the hot strip throughout the entire rolling process to keep in the austenitic phase area.
  • the switch from batch operation to semi-endless operation takes place during the rolling process, thus when the strip is in engagement with one or more rolling stands of the rolling device.
  • the switching is preferably carried out after the rolling of a plurality, preferably more than two, particularly preferably between two to two and a half, of individual slabs.
  • a preferably flying shear is arranged behind the last roll stand and in front of the reel device, with which the thin strip produced can be cut to the desired length for the coil.
  • the length of the furnace between the casting machine and the rolling device is preferably dimensioned such that it corresponds at least to the length of a jumbo slab for carrying out the semi-endless operation.
  • the length of a jumbo slab will correspond to a multiple of the length of a single slab, the length of the furnace, preferably the tunnel kiln, being dimensioned such that a jumbo slab can hold five times the length of a long single slab (single slab with a maximum thickness of 40 mm) ,
  • the usual lengths of such tunnel ovens are approximately 250 m.
  • the method according to the invention is preferably carried out on a system as has already been discussed in detail above.
  • thin slabs are preferably rolled into thin strips which leave the casting machine or the casting machines provided in parallel with a thickness of 40 to 140 mm. This provides a process that provides the largest possible product mix both in terms of the achievable final thicknesses and the steel grades to be processed.
  • steel strip of the "low carbon steel” quality preferably steel strip with a thickness of 0.8 to 1.2 mm in semi-endless operation and steel strip with a thickness greater than 1.2 mm in batch operation ,
  • the system produces steel strips of the "medium-carbon steel” quality, preferably steel strips with a thickness of 1.4 to 1.8 mm in semi-endless operation and steel strips with thicknesses greater than 1.8 mm in batch mode.
  • the plant produces steel strips of the "high-strength low-alloyed steel” quality, preferably steel strips with a thickness of 1.4 to 2.0 mm in semi-endless operation and with thicknesses greater than 2. 0 mm in batch mode.
  • Figure 1 shows a schematic representation of a CSP-® system, which is capable of further processing the steel grades cast into thin slabs by means of the casting machine, both in batch operation and in semi-endless operation to thin strips with a desired final thickness.
  • scissors 2 are provided for dividing the thin slabs before the thin slabs enter the roller hearth furnace or furnaces 3.
  • These roller hearth furnaces or tunnel furnaces 3 are used both for reheating and for comparing the thin slab temperature.
  • At least the length of the upper tunnel kiln 3 is dimensioned such that at least one jumbo frame can be completely accommodated in the tunnel kiln 3 for carrying out semi-endless operation.
  • the lower tunnel furnace 3 directly downstream of the parallel casting machine 1 can also have this length, but must be at least the length of a single slab for batch operation in order to be able to receive and heat this single slab when carrying out the batch operation.
  • the second tunnel furnace 3 can also serve as a buffer for the upper casting machine tunnel furnace arrangement 1, 3 via a suitable switch device between the tunnel furnaces 3.
  • a scale washer 4 is provided for removing surface scale, in order to thereby positively influence the rolling in the first group of roll stands 5, in particular to keep it free from surface damage caused by scale.
  • the separating shears 6 can be used to separate the rolling process within the first roll stand group 5 from the rolling process in the second roll stand group 8, in particular with regard to the speed of entry of the intermediate strip into the second roll stand group 8 after it has left the first roll stand group 5.
  • Induction heater 7 arranged, which can preferably be removed from the rolling line when the induction heater 7 is not required for performing the rolling process.
  • a laminar cooling section 9 for setting the desired coiling temperature for the thin strip is arranged downstream of the second roll stand group 8.
  • This laminar cooling section 9 is preferably provided with means for controllably increasing cooling of the thin strip, usually liquid nozzles or nozzles, which are able to apply a mixture of air and a cooling liquid to the thin strip.
  • a high-speed shear 10 is arranged between the laminar cooling section 9 and two separately controllable underfloor reels 11 for separating the rolled thin strip to the desired coil lengths.
  • Figure 2 shows, by way of example, a tabular list of the steel grades that can be processed on the plant in the process according to the invention and the strip thicknesses to be produced via the plant, which also indicates which steel grades and which strip thicknesses can be produced in the semi-endless rolling mode and the batch mode.
  • "low-carbon steel” steel grades with final thicknesses greater than 1.4 mm can be produced in batch operation and in the thickness range 0.8 mm to 1.4 mm in semi-endless operation.
  • the steel grade "advanced high-strength steel” is manufactured in the thickness range 1.4 to 2.5 mm in semi-endless operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Claims (12)

  1. Procédé destiné à l'exploitation d'une installation destinée à la production de bandes métalliques, de préférence de bandes en acier, possédant une épaisseur de 0,8 à 3,0 mm dans une exploitation en discontinu ou en semi-continu, et des épaisseurs supérieures à 2,5 mm dans une exploitation en discontinu, comprenant au moins une machine de coulée (1) destinée à la coulée de brames minces et un mécanisme de laminage (5, 8) disposé en aval de ladite au moins une machine de coulée (1), comprenant un certain nombre de cages de laminoir destinées au laminage des brames minces, afin d'obtenir des bandes métalliques possédant une épaisseur prédéfinie, de même que, au moins un dispositif de bobinage (11) disposé en aval du mécanisme de laminage ; dans lequel entre ladite au moins une machine de coulée (1) et le mécanisme de laminage (5, 8), sont disposés une machine à cisailler (2) et un four (3) ; caractérisé en ce que l'on modifie l'emprise d'au moins une cage de laminoir au cours du processus de laminage et un mécanisme de commande commande l'installation d'une manière telle que l'on procède à une commutation en passant de l'exploitation en discontinu à l'exploitation en semi-continu ou inversement en fonction des produits métalliques, de préférence des produits en acier, et l'on obtient l'épaisseur désirée de la bande métallique à fabriquer ; et en ce que le passage par commutation de l'exploitation en discontinu à l'exploitation en semi-continu a lieu au cours du processus de laminage par l'intermédiaire du mécanisme de laminage.
  2. Procédé selon la revendication 1, caractérisé en ce que le passage par commutation de l'exploitation en discontinu à l'exploitation en semi-continu a lieu au cours du processus de laminage après le laminage d'un certain nombre, de préférence de plus de deux, de manière particulièrement préférée d'un nombre entre 2 et 5 brames individuelles.
  3. Procédé selon la revendication 2, caractérisé en ce que le passage par commutation de l'exploitation en discontinu à l'exploitation en semi-continu a lieu au cours du processus de laminage lorsque le mécanisme de laminage (5, 8), en particulier les cylindres de travail des cages de laminoir respectives, a adopté, dans l'exploitation en discontinu, une température d'exploitation prédéfinie.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les brames minces présentent, une fois qu'elles ont quitté ladite au moins une machine de coulée (1), une épaisseur de 40 à 140 mm.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la modification de ladite au moins une emprise au cours du processus de laminage a lieu d'une manière telle que aussi bien l'extrémité de bande de la bande métallique laminée précédemment que la tête de bande de la bande métallique qui y fait suite se situent dans l'intervalle des tolérances d'épaisseurs requises.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'installation produit des bandes d'acier possédant une qualité d'acier à faible teneur en carbone, de préférence des bandes d'acier possédant une épaisseur de 0,8 à 1,2 mm dans l'exploitation en semi-continu et des épaisseurs supérieures à 1,4 mm dans l'exploitation en discontinu.
  7. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'installation produit des bandes d'acier possédant une qualité d'acier à teneur moyenne en carbone, de préférence des bandes d'acier possédant une épaisseur de 1,4 à 1,8 mm dans l'exploitation en semi-continu et des épaisseurs supérieures à 2,0 mm dans l'exploitation en discontinu.
  8. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'installation produit des bandes d'acier possédant une qualité d'acier à haute teneur en carbone, de préférence des bandes d'acier possédant une épaisseur de 1,4 à 2,0 mm dans l'exploitation en semi-continu et des épaisseurs supérieures à 2,5 mm dans l'exploitation en discontinu.
  9. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'installation produit des bandes d'acier possédant une qualité d'acier de haute résistance faiblement allié, de préférence des bandes d'acier possédant une épaisseur de 1,4 à 2,0 mm dans l'exploitation en semi-continu et des épaisseurs supérieures à 2,5 mm dans l'exploitation en discontinu.
  10. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'installation produit des bandes d'acier possédant une qualité d'acier avancé à haute résistance possédant une épaisseur de 1,4 à 2,5 mm, de préférence dans l'exploitation en semi-continu.
  11. Procédé selon l'une quelconque des revendications 1 à 10, caractérisé en ce que la production de bandes métalliques, dans l'exploitation en discontinu, a lieu en l'absence d'un chauffage de la bande par induction, et dans l'exploitation en semi-continu, avec un chauffage par induction, uniquement lors de la production de qualités à haute résistance possédant de petites épaisseurs, de préférence lors de la production d'acier haute résistance faiblement allié possédant une épaisseur de 1,4 à 1,6 mm ou d'acier avancé à haute résistance possédant une épaisseur de 1,4 à 1,8 mm.
  12. Procédé selon l'une quelconque des revendications 1 à 11, caractérisé en ce que le mécanisme de laminage, dans l'exploitation en discontinu, est alimenté à partir de deux machines de coulée (1).
EP16756979.7A 2015-08-28 2016-08-12 Procédé de fonctionnement d'une installation fonctionnant suivant le concept csp (compact strip production) Active EP3341142B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015216512.4A DE102015216512A1 (de) 2015-08-28 2015-08-28 Anlage nach dem CSP-Konzept sowie Verfahren zum Betreiben einer solchen Anlage
PCT/EP2016/069220 WO2017036769A1 (fr) 2015-08-28 2016-08-12 Installation fonctionnant suivant le concept csp (compact strip production) et procédé de fonctionnement d'une telle installation

Publications (2)

Publication Number Publication Date
EP3341142A1 EP3341142A1 (fr) 2018-07-04
EP3341142B1 true EP3341142B1 (fr) 2020-01-15

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EP (1) EP3341142B1 (fr)
DE (1) DE102015216512A1 (fr)
TW (1) TWI615210B (fr)
WO (1) WO2017036769A1 (fr)

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CN108405616B (zh) * 2018-03-07 2021-02-12 黑龙江工程学院 一种超声波辅助镁合金材料连铸连轧的制备方法及设备
DE102019207459A1 (de) * 2018-05-23 2019-11-28 Sms Group Gmbh Gieß-Walzanlage für den Batch- und Endlosbetrieb
CN109731914B (zh) * 2019-02-21 2020-07-24 江苏沙钢集团有限公司 一种改善双辊连铸轧带表面质量的轧制方法
CN110202106A (zh) * 2019-06-04 2019-09-06 甘肃酒钢集团宏兴钢铁股份有限公司 控制csp薄板连铸机生产中碳合金钢板坯表面裂纹的方法
IT202000000316A1 (it) * 2020-01-10 2021-07-10 Danieli Off Mecc Metodo ed apparato di produzione di prodotti metallici piani
EP4049768A1 (fr) * 2021-02-25 2022-08-31 Primetals Technologies Austria GmbH Installation combinée de coulée et de laminage et procédé de fabrication de feuillard d'une épaisseur finale inférieure à 1,2 mm sur l'installation combinée de coulée et de laminage

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US20100275667A1 (en) 2007-09-13 2010-11-04 Seidel Juergen Compact, flexible csp installation for continuous, semi-continuous and batch operation
US7832460B2 (en) 2005-04-07 2010-11-16 Giovanni Arvedi Process and system for manufacturing metal strips and sheets without discontinuity between continuous casting and rolling
US8011418B2 (en) 2007-08-24 2011-09-06 SMA Siemag Aktiengesellschaft Method and device for manufacturing a metal strip by means of continuous casting and rolling
US20110289993A1 (en) 2008-10-30 2011-12-01 Siemens Aktiengesellschaft Method for adjusting a discharge thickness of rolling stock that passes through a multi-stand mill train, control and/or regulation device and rolling mill
US8137485B2 (en) 2007-07-21 2012-03-20 Sms Siemag Aktiengesellschaft Process and device for producing strips of silicon steel or multiphase steel
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WO2014135710A1 (fr) 2013-03-08 2014-09-12 Sms Siemag Ag Procédé de production d'une bande métallique au moyen de cylindres de coulée
WO2015092770A1 (fr) 2013-12-20 2015-06-25 Novelis do Brasil Ltda. Changement dynamique de réduction (dsr) pour réguler la température dans des laminoirs en tandem
EP2569104B1 (fr) 2010-05-10 2015-08-05 Danieli & C. Officine Meccaniche SpA Procédé de production de produits laminés plats

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US20110289993A1 (en) 2008-10-30 2011-12-01 Siemens Aktiengesellschaft Method for adjusting a discharge thickness of rolling stock that passes through a multi-stand mill train, control and/or regulation device and rolling mill
EP2569104B1 (fr) 2010-05-10 2015-08-05 Danieli & C. Officine Meccaniche SpA Procédé de production de produits laminés plats
WO2014135710A1 (fr) 2013-03-08 2014-09-12 Sms Siemag Ag Procédé de production d'une bande métallique au moyen de cylindres de coulée
WO2015092770A1 (fr) 2013-12-20 2015-06-25 Novelis do Brasil Ltda. Changement dynamique de réduction (dsr) pour réguler la température dans des laminoirs en tandem

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Publication number Publication date
EP3341142A1 (fr) 2018-07-04
DE102015216512A1 (de) 2017-03-02
WO2017036769A1 (fr) 2017-03-09
TW201711766A (zh) 2017-04-01
TWI615210B (zh) 2018-02-21

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