EP0872288A2 - Procédé et installation pour le laminage de brames longues - Google Patents

Procédé et installation pour le laminage de brames longues Download PDF

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Publication number
EP0872288A2
EP0872288A2 EP98102462A EP98102462A EP0872288A2 EP 0872288 A2 EP0872288 A2 EP 0872288A2 EP 98102462 A EP98102462 A EP 98102462A EP 98102462 A EP98102462 A EP 98102462A EP 0872288 A2 EP0872288 A2 EP 0872288A2
Authority
EP
European Patent Office
Prior art keywords
slab
strip
rolling
lengths
cut
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.)
Withdrawn
Application number
EP98102462A
Other languages
German (de)
English (en)
Other versions
EP0872288A3 (fr
Inventor
Vladimir B. Ginzburg
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 United A division of Danieli Corp
Danieli United Inc
International Rolling Mill Consultants Inc
Original Assignee
Danieli United A division of Danieli Corp
Danieli United Inc
International Rolling Mill Consultants Inc
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 United A division of Danieli Corp, Danieli United Inc, International Rolling Mill Consultants Inc filed Critical Danieli United A division of Danieli Corp
Publication of EP0872288A2 publication Critical patent/EP0872288A2/fr
Publication of EP0872288A3 publication Critical patent/EP0872288A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B21B1/22—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 plates, strips, bands or sheets of indefinite length
    • B21B1/24—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill

Definitions

  • This invention relates to improved hot strip rolling mills and, more particularly, to such improved mills which have an ability to continuously produce a plurality of rolled coils from a single slab continuously cast from one or a number of heats of molten metal, e.g. steel.
  • each slab is sized to produce only one coil from that slab. This creates the following problems:
  • a typical present mill arrangement comprises a continuous caster coupled to a rolling line comprising a shear to cut the continuously cast slab into lengths to produce a single coil, a first tunnel reheat furnace, an edger, one or more roughing stands, a second tunnel reheat furnace, a flying shear, finish rolling stands, a runout cooling table, and one or more coilers.
  • the prior art mill arrangement is modified to increase the length of the first tunnel reheat furnace so as to accommodate all the slabs that can be produced from one heat of molten metal, and a movable welding machine for welding successive slabs together is introduced into the mill line after the first tunnel reheat furnace.
  • the second tunnel reheat furnace is eliminated and a pair of pinch rolls and a pair of deflecting roller tables are installed after the runout cooling table, and a second flying shear is installed after the second pinch roll.
  • continuous (uninterrupted) rolling can be performed with the production of a plurality of coils from a single slab or from a plurality of slabs from a single heat or a plurality of heats and with a minimum requirement for welding or otherwise joining successive coils.
  • cutting and coiling the finished coils can be done at lower speed, thus minimizing or eliminating the disadvantages of high speed cutting and coiling.
  • Fig. 1 shows a typical present continuous casting/rolling mill arrangement.
  • slab is continuously cast with one or two continuous casters 1 and 13, e.g. in a thickness range of from about 50 to about 100 mm.
  • Typical reductions in thickness are shown in Table 1.
  • the slab length will be approximately 26 meters.
  • the cut slab then is introduced into the first tunnel reheat furnace 3 where its temperature is raised to about 1100-1200°C.
  • the length of the first reheat tunnel furnace L1 is determined by a required buffer time, i.e. a time during which the casting process can continue while the rolling mill is not operating.
  • the length L1 usually is selected to accommodate three or four cut slabs.
  • the slab After reheating in furnace 3, the slab enters edger 4. Then, after rolling by the first roughing stand 5 and the second roughing stand 6, the slab is reduced in thickness to about 20-50 mm.
  • the thus-obtained long transfer bar then enters the second reheat furnace 7 where its temperature is raised to about 1050-1100°C.
  • the length L2 of the furnace 7 is selected to accommodate the longest transfer bar. For example, for a coil with a specific weight of 20 kg/mm, the length of the 20 mm thick transfer bar would be approximately 130 meters.
  • the transfer bar After shearing with the flying shear 8, the transfer bar is threaded through the finishing train 9 where it is reduced in thickness to about 1.0 to 12 mm.
  • the threading speed of the last stand does not exceed about 10-11 meters/sec in order to prevent air-borning of the strip exiting this stand.
  • strip guiding means such as a belt wrapper as disclosed in U.S. Patent No. 3,315,510 or a slotted coiler drum as disclosed in U.S. Patent No. 3,122,337, both of which patents are incorporated herein by this reference.
  • strip tension is established between the finishing mill and the coiler, the rolling line can be accelerated to either control the strip temperature or to increase the production rate, or to do both.
  • the strip is water cooled by the runout table cooling system 10.
  • the second cast slab is cut with a shearing machine 14 into the slab lengths from which only one coil is rolled. Each cut slab then is reheated in the tunnel furnace 15 and transferred to the rolling line by a transfer ferry 16.
  • the process and apparatus of the invention can function in any one of three different modes.
  • the invention can operate in accordance with the above-described and illustrated conventional casting by cutting the slab into lengths and rolling only one coil per cut slab length.
  • the invention operates as a continuous casting and rolling process in which cast slabs are cut into lengths to roll more than one coil per cut slab length and up to an entire heat size. Since casting speed is in the range or about 3 to 4.5 m/min, that is, slower than the entry speed of the rolling mill which is within the range of about 10 to 30 m/min (see Table 1), the casting cycle for one caster will be longer than the rolling cycle. After casting and cutting a required slab length (if the entire heat is not used), the slab is preheated in the tunnel furnace 17 and subsequently is rolled by the edger 4 and the horizontal mill stands 5, 6 and 9.
  • the flying shear 8 generally will be used for shearing the head and tail ends of the bar rolled from each cut slab.
  • both pinch roll machines 19 and 21 are disengaged from the strip and the deflecting tables 22 and 23 are maintained in a horizontal position, i.e. in line with the runout table 10.
  • the pinch roll machines are engaged with the strip and the deflecting roller tables 22 and 23 are lowered, as illustrated in Fig. 2.
  • the speeds of both the pinch roll machine 21 and coiler 11 or 12 are slowed to the speed optimum for shearing (approximately 1 to 5 m/min).
  • a temporary loop 26 (Fig. 2) is formed between those machines.
  • the flying shear 24 will make a cut of the strip. Then the head end of the remaining portion of the strip is guided toward the previously unused coiler. As soon as a new portion of the strip enters the latter coiler, and the strip tension between the pinch roll machine 21 and that coiler is established, the speeds of both the pinch roll machine 21 and the newly used coiler is increased to mill exit speed. After the strip loop 26 is eliminated, the deflecting tables 22 and 23 are again raised to the mill pass lie and the pinch roll machines are disengaged from the strip.
  • a third mode of operation comprises operating the inventive process and apparatus by continuous casting in two casters and rolling the slab length corresponding to more than one heat.
  • the second caster 13 casts a slab, with cutting, if necessary, by the cutting machine 14.
  • the cut slab length, produced by the second caster 13 is transferred by the transfer ferry 20 to the rolling mill line.
  • This portion of the slab then is accelerated so that its head end gets in touch with the tail end of the slab, produced by the first caster 1, that is being rolled. After establishing such contact of the ends of the respective slabs, the speeds of both slabs are synchronized with each other.
  • the welding machine 18 starts moving along the mill line with the same speed as the slabs and performs a stick welding operation. After the welding procedure is completed, the welding machine returns to its initial position. Thereafter the operation can continue as in the second mode of operation to produce a plurality of coils of rolled metal strip.
  • Practice of the invention provides a means for producing multiple coils from longer slabs than possible with use of the prior art. It consequently reduces the number of times threading of the mill has to be done, thereby reducing yield losses in the form of scrapped lower quality strip rolled without interstand strip tension, reducing the risk of strip cobbling and reducing productivity losses due to the need to slow down the strip to avoid air-lifting during threading.
  • the invention also reduces yield losses incident to the necessity of cutting out lower quality transfer bar head and tail portions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
EP98102462A 1997-04-16 1998-02-12 Procédé et installation pour le laminage de brames longues Withdrawn EP0872288A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US84369497A 1997-04-16 1997-04-16
US843694 1997-04-16

Publications (2)

Publication Number Publication Date
EP0872288A2 true EP0872288A2 (fr) 1998-10-21
EP0872288A3 EP0872288A3 (fr) 1999-04-07

Family

ID=25290753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98102462A Withdrawn EP0872288A3 (fr) 1997-04-16 1998-02-12 Procédé et installation pour le laminage de brames longues

Country Status (2)

Country Link
EP (1) EP0872288A3 (fr)
CA (1) CA2229255C (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071271A1 (fr) * 1999-05-21 2000-11-30 Danieli Technology, Inc. Complexe integre de production de pieces laminees
KR101365044B1 (ko) 2013-01-31 2014-02-25 주식회사 갑우 태양전지 모듈용 리본의 풀림 처리장치
CN112068491A (zh) * 2020-09-02 2020-12-11 四川省达州钢铁集团有限责任公司 一种提高飞剪的响应速度的方法
EP4721889A1 (fr) * 2024-10-04 2026-04-08 Primetals Technologies Austria GmbH Installation et procédé de fabrication d'une bande métallique en fonctionnement continu ou en mode discontinu

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107088585A (zh) * 2017-06-09 2017-08-25 首钢京唐钢铁联合有限责任公司 一种带钢的轧制方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS589719A (ja) * 1981-07-08 1983-01-20 Toshiba Corp ホツトストリツプミル設備における巻取時のネツキング防止方法
JPS5816707A (ja) * 1981-07-23 1983-01-31 Sumitomo Metal Ind Ltd 鋼帯の製造方法
JPS5850104A (ja) * 1982-05-10 1983-03-24 Nippon Steel Corp 鋼材の熱間圧延設備列
US5121873A (en) * 1990-06-06 1992-06-16 Hitachi Ltd. Method of and apparatus for joining hot materials to be rolled to each other as well as continuous hot rolling method and system
JPH06106222A (ja) * 1992-09-28 1994-04-19 Nkk Corp 昇降機構を有するホットランテーブルロール
JPH0788507A (ja) * 1993-09-24 1995-04-04 Toshiba Corp 熱間帯鋼の連続圧延装置
IT1267916B1 (it) * 1994-03-31 1997-02-18 Danieli Off Mecc Procedimento per la produzione di nastro partendo da bramme sottili e relativo impianto
CN1070393C (zh) * 1995-03-03 2001-09-05 株式会社东芝 热轧装置
NL1003293C2 (nl) * 1996-06-07 1997-12-10 Hoogovens Staal Bv Werkwijze en inrichting voor het vervaardigen van een stalen band.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000071271A1 (fr) * 1999-05-21 2000-11-30 Danieli Technology, Inc. Complexe integre de production de pieces laminees
US6289972B1 (en) 1999-05-21 2001-09-18 Danieli Technology Inc. Integrated plant for the production of rolled stock
KR101365044B1 (ko) 2013-01-31 2014-02-25 주식회사 갑우 태양전지 모듈용 리본의 풀림 처리장치
CN112068491A (zh) * 2020-09-02 2020-12-11 四川省达州钢铁集团有限责任公司 一种提高飞剪的响应速度的方法
EP4721889A1 (fr) * 2024-10-04 2026-04-08 Primetals Technologies Austria GmbH Installation et procédé de fabrication d'une bande métallique en fonctionnement continu ou en mode discontinu
WO2026074138A1 (fr) 2024-10-04 2026-04-09 Primetals Technologies Austria GmbH Installation et procédé de production d'une bande métallique en mode continu ou en mode discontinu

Also Published As

Publication number Publication date
EP0872288A3 (fr) 1999-04-07
CA2229255A1 (fr) 1998-10-16
CA2229255C (fr) 2002-01-08

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