US20080000612A1 - Method and Device for Continuous Casting of Metals - Google Patents

Method and Device for Continuous Casting of Metals Download PDF

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Publication number
US20080000612A1
US20080000612A1 US11/793,112 US79311205A US2008000612A1 US 20080000612 A1 US20080000612 A1 US 20080000612A1 US 79311205 A US79311205 A US 79311205A US 2008000612 A1 US2008000612 A1 US 2008000612A1
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US
United States
Prior art keywords
accordance
conveyor belt
nozzles
nozzle
coolant
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.)
Abandoned
Application number
US11/793,112
Other languages
English (en)
Inventor
Jorg Bausch
Udo Falkenreck
Hans-Jurgen Schemeit
Walter Weischedel
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 Siemag AG
Original Assignee
SMS Demag 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 Demag AG filed Critical SMS Demag AG
Assigned to SMS DEMAG AG reassignment SMS DEMAG AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WEISCHEDEL, WALTER, FALKENRECK, UDO, SCHEMEIT, HANS-JURGEN, BAUSCH, JORG
Publication of US20080000612A1 publication Critical patent/US20080000612A1/en
Assigned to SMS SIEMAG AKTIENGESELLSCHAFT reassignment SMS SIEMAG AKTIENGESELLSCHAFT CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SMS DEMAG AG
Abandoned 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
    • B22D11/06—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
    • B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
    • B22D11/0685—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting belts
    • 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
    • B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt

Definitions

  • the invention concerns a method for the near-net-shape casting of metal strands, especially rectangular strands, where liquid metal is cast on a revolving conveyor belt with subsequent in-line rolling.
  • the invention also concerns a device for carrying out this method.
  • liquid metal is cast through an opening in the wall of a horizontally movable feed tank onto the upper side of a horizontally revolving belt, where it solidifies. After solidification has occurred, the strip that has been cast in this way is conveyed directly to a rolling stand or a rolling train.
  • EP 1 077 782 B1 describes a method for the near-net-shape casting of rectangular strands of metal, especially steel, followed by in-line rolling out of the strand, with a material feed tank, through whose discharge nozzle the liquid metal is fed onto the carrying run of a conveyor belt, on which it solidifies and is transferred to a rolling stand, with the following steps:
  • the conveying speed of the conveyor belt is set as a function of a desired rolling thickness and rolling speed of the rolling stand.
  • the cited document also discloses a device for the near-net-shape casting of rectangular strands of metal, especially steel, followed by in-line rolling out of the strand, which device comprises a material feed tank with a discharge nozzle, a horizontally arranged conveyor belt, and at least one rolling stand downstream of the conveyor belt, where the material feed tank is connected with motion control elements for moving it in the horizontal direction, coaxially with the principal axis of the conveyor belt in the same direction as or in the opposite direction from the direction of conveyance of the strand, and where the material feed tank is connected to an actuator, which is automatically controlled by an automatic control system, which is connected to the actuator and to measuring elements for determining the position of the complete solidification of the strand and measuring elements for determining the temperature of the rolling stock.
  • the prior art thus includes a method and a device in which the point at which the metal is fed onto the conveyor belt is locally fixed or locally variable.
  • a disadvantage of a locally fixed metal feed point is that it greatly limits the production spectrum. Only products with small variations in dimensions or material properties can be produced. An improvement was realized with a variable liquid metal feed point onto the conveyor belt.
  • a method or device of this type has the disadvantage that the cooling is not adapted to the variable boundary conditions. It was realized that the type of cooling and the position or spatial configuration of the cooling during the strip casting affect the heat dissipation, for example, in such a way that local heating of the conveyor belt occurs, which causes the conveyor belt to fail. Furthermore, the effective heat transfer can be so low that sufficient solidification of the cast strip is not achieved.
  • the objective of the invention is to specify a method and a device in which the production window or production spectrum is widened. This includes the casting of different metals and grades, the casting of different production thicknesses and widths, and a wide variance of the casting speed in order to avoid the disadvantages specified above.
  • the objective of the invention is achieved by cooling the conveyor belt.
  • the invention also concerns a device for carrying out the method of the invention.
  • the decisive advantage of the method of the invention is that the intensity of the cooling is designed according to the greatest heat transfer in such a way that the greatest cooling effect is realized at the point of first contact of the liquid metal with the conveyor belt and decreases downstream.
  • a more flexible production spectrum is realized by local variation of the point at which the liquid metal is fed onto the conveyor belt in conjunction with optimally adapted cooling or cooling configuration.
  • the point at which the liquid metal comes into contact with the conveyor belt must be varied in the casting direction under certain boundary conditions, such as varying metal grades, mass flow rates and the like.
  • the intensity of the cooling is adjusted by local variation of the cooling zone in the direction of conveyance. Therefore, the zone of the conveyor belt that has the greatest cooling intensity is correlated with the point of discharge of the liquid metal from the feed tank.
  • the method of the invention and the device of the invention make the effective cooling length and heat dissipation more flexible to widen the production window. This makes it possible to cast materials that require more or less intense cooling in a wide range of flow rates.
  • the nozzles are combined in several independent units.
  • a separate, pressure-controlled water supply is assigned to each nozzle unit.
  • the pressure with which the coolant is sprayed against the underside of the carrying run of the conveyor belt is greatest in each case at the point at which the liquid metal is fed onto the upper side of the carrying run of the conveyor belt.
  • the pressure in the following nozzle units is reduced, e.g., incrementally.
  • the pressure in the individual nozzle units is varied.
  • the pressure with which the individual nozzle units spray the coolant at the underside of the carrying run of the conveyor belt remains constant.
  • the individual nozzle units are arranged in such a way that the nozzle unit with the greatest cooling effect, i.e., the greatest coolant volume flow rate, is always positioned where the liquid metal is fed onto the conveyor belt. This is accomplished by local shifting or displacement of the nozzle units.
  • the parameters of conveyor belt speed and amount of metal/time are varied.
  • the effective cooling length necessary for solidification is adapted to the metallurgical length.
  • This process is carried out as follows in various situations, and uniform feeding of the liquid metal to the conveyor belt is assumed.
  • the mass flow rate m is held constant—when the end position of the unit Z/I is reached, the conveyor belt speed v Tr is reduced to its original value.
  • FIG. 1 shows a strip casting plant with pressure control of the nozzle segments, where a metal feed tank is located in different positions ( 1 a , 1 b , 1 c ).
  • FIG. 2 shows a strip casting plant with interchangeable nozzle segments, where a metal feed tank is located in different positions ( 2 a , 2 b , 2 c ).
  • a metal feed tank 1 for liquid metal 2 is located above a conveyor belt 3 .
  • the conveyor belt 3 runs around two rollers 4 and 5 .
  • Liquid metal 2 is fed from an opening 6 in the metal feed tank 1 onto the upper side 7 of the carrying run 8 of the conveyor belt 3 .
  • Rotary motion of the rollers 4 and 5 causes the liquid metal 2 to be conveyed in conveyance direction 9 to a rolling installation (not shown).
  • the liquid metal 2 must have formed a strand shell of sufficient strength when it leaves the conveyor belt 3 in the area of roller 5 .
  • nozzles 11 are installed near the underside 10 of the carrying run 8 of the conveyor belt 3 .
  • a coolant such as water or the like, is sprayed from the nozzles 11 towards the underside 10 of the carrying run 8 .
  • the nozzles 11 are arranged, for example, in four nozzle segments 12 , 13 , 14 , 15 .
  • Each nozzle segment 12 , 13 , 14 , 15 has a separate, pressure-controlled water supply (not shown). This makes it possible for each nozzle segment 12 , 13 , 14 , 15 to be pressurized with a different pressure.
  • the highest pressure of the cooling water or coolant is provided where the greatest amount of heat must be dissipated. This location corresponds to the point at which the liquid metal 2 is fed onto the upper side 7 . In FIG. 1 a , this point is located on the left side. Therefore, the nozzle segment 12 is pressurized, for example, with a pressure of 8 bars. Since the amount of heat to be removed decreases in the direction of conveyance 8 , nozzle segment 13 is pressurized with a reduced pressure of, for example, 6 bars, nozzle segment 14 with 4 bars, and nozzle segment 15 with 3 bars.
  • the nozzle segment located upstream of the point at which the liquid metal 2 is fed onto the upper side 7 are also pressurized with a reduced pressure (nozzle segment in FIG. 1 b , and nozzle segments in FIG. 1 c ).
  • the nozzle segment located upstream of the point at which the liquid metal 2 is fed onto the upper side 7 are also pressurized with a reduced pressure (nozzle segment in FIG. 1 b , and nozzle segments in FIG. 1 c ).
  • the pressures can be individually adjusted at any time and are affected by the aforementioned boundary conditions, such as metal properties, mass flow rate, etc.
  • the cooling water or coolant is supplied under constant pressure to the individual nozzle segments 16 , 17 , 18 , 19 , 20 .
  • All of the nozzle segments 16 , 17 , 18 , 19 , 20 can be supplied by a centralized system, or each individual nozzle segment can be supplied by a decentralized system.
  • the nozzles of the nozzle segments are designed in such a way that the nozzle segments 16 , 17 , 18 , 19 , 20 have different cooling effects. This can be achieved, for example, by different volume flows of the coolant.
  • the nozzle segment 16 , 17 , 18 , 19 , 20 with the greatest cooling effect is positioned where the liquid metal 2 is fed onto the conveyor belt 3 . Since this place varies, the nozzle segments 16 , 17 , 18 , 19 , 20 can be interchanged or shifted. In FIG. 2 a , the greatest cooling effect is achieved in the left nozzle segment 16 . The cooling effect decreases in the following nozzle segments 17 , 18 , 19 , 20 in the direction of conveyance 9 .
  • FIG. 2 b the point of delivery of the liquid metal 2 is displaced in the direction of conveyance 9 .
  • the nozzle segment 16 described in connection with FIG. 2 a is likewise displaced in the direction of conveyance 9 .
  • downstream nozzle segments 17 , 18 , 19 , 20 are each displaced by one position to the right.
  • a displacement by one additional position is shown in FIG. 2 c.
  • the effective ling length is thus adapted to the metallurgical length.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Metal Rolling (AREA)
  • Wire Processing (AREA)
US11/793,112 2004-12-18 2005-12-16 Method and Device for Continuous Casting of Metals Abandoned US20080000612A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004061080A DE102004061080A1 (de) 2004-12-18 2004-12-18 Verfahren und Vorrichtung zum Bandgießen von Metallen
DE102004061080.0 2004-12-18
PCT/EP2005/013571 WO2006063847A1 (de) 2004-12-18 2005-12-16 Verfahren und vorrichtung zum bandgiessen von metallen

Publications (1)

Publication Number Publication Date
US20080000612A1 true US20080000612A1 (en) 2008-01-03

Family

ID=36011709

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/793,112 Abandoned US20080000612A1 (en) 2004-12-18 2005-12-16 Method and Device for Continuous Casting of Metals

Country Status (9)

Country Link
US (1) US20080000612A1 (ja)
EP (1) EP1827735B1 (ja)
JP (1) JP4922945B2 (ja)
AT (1) ATE414579T1 (ja)
AU (1) AU2005315789A1 (ja)
DE (2) DE102004061080A1 (ja)
ES (1) ES2314751T3 (ja)
PL (1) PL1827735T3 (ja)
WO (1) WO2006063847A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110023007A (zh) * 2016-11-29 2019-07-16 Sms集团有限公司 用于由液态金属制造铸件的履带式铸造机和方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2715813C (en) 2008-02-13 2017-03-21 Erich Zurfluh Light delivery device that provides a radial light output pattern
DE102010005226C5 (de) 2010-01-21 2020-02-13 Fritz-Peter Pleschiutschnigg Verfahren und Vorrichtung zum Bandgießen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721154A (en) * 1986-03-14 1988-01-26 Sulzer-Escher Wyss Ag Method of, and apparatus for, the continuous casting of rapidly solidifying material
US5671801A (en) * 1996-01-11 1997-09-30 Larex A.G. Cooling system for a belt caster and associated methods
US6363997B1 (en) * 1998-05-19 2002-04-02 Sms Demag Ag Method and device for casting metal close to final dimensions
US6453984B1 (en) * 2001-03-13 2002-09-24 Honeywell International Inc. Apparatus and method for casting amorphous metal alloys in an adjustable low density atmosphere

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6127149A (ja) * 1984-07-17 1986-02-06 Sumitomo Metal Ind Ltd 水平連続鋳造装置
JPS63123552A (ja) * 1986-11-12 1988-05-27 Kawasaki Steel Corp ベルト式連続鋳造機のベルト冷却装置
JPS63126652A (ja) * 1986-11-18 1988-05-30 Kawasaki Steel Corp 双ベルト式連続鋳造方法
JPH01254351A (ja) * 1988-04-01 1989-10-11 Hitachi Ltd ベルト式連続鋳造機の冷却パッド
JPH084887B2 (ja) * 1989-12-06 1996-01-24 株式会社日立製作所 高温鋳片の搬送装置
JP2680470B2 (ja) * 1990-09-14 1997-11-19 新日本製鐵株式会社 双ベルト式連続鋳造機のベルト冷却方法
JPH09141408A (ja) * 1995-11-24 1997-06-03 Kawasaki Steel Corp 連続鋳造の二次冷却方法
JPH09192791A (ja) * 1996-01-22 1997-07-29 Kobe Steel Ltd ベルト式連続鋳造機の冷却パッド
US5967223A (en) * 1996-07-10 1999-10-19 Hazelett Strip-Casting Corporation Permanent-magnetic hydrodynamic methods and apparatus for stabilizing a casting belt in a continuous metal-casting machine
JP2000126848A (ja) * 1998-10-27 2000-05-09 Ishikawajima Harima Heavy Ind Co Ltd 急冷合金箔帯製造装置とその方法
US6755236B1 (en) * 2000-08-07 2004-06-29 Alcan International Limited Belt-cooling and guiding means for continuous belt casting of metal strip

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721154A (en) * 1986-03-14 1988-01-26 Sulzer-Escher Wyss Ag Method of, and apparatus for, the continuous casting of rapidly solidifying material
US5671801A (en) * 1996-01-11 1997-09-30 Larex A.G. Cooling system for a belt caster and associated methods
US6363997B1 (en) * 1998-05-19 2002-04-02 Sms Demag Ag Method and device for casting metal close to final dimensions
US6453984B1 (en) * 2001-03-13 2002-09-24 Honeywell International Inc. Apparatus and method for casting amorphous metal alloys in an adjustable low density atmosphere

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110023007A (zh) * 2016-11-29 2019-07-16 Sms集团有限公司 用于由液态金属制造铸件的履带式铸造机和方法
US10758970B2 (en) * 2016-11-29 2020-09-01 Sms Group Gmbh Caterpillar casting machine and method for producing a cast material from liquid metal

Also Published As

Publication number Publication date
JP4922945B2 (ja) 2012-04-25
AU2005315789A1 (en) 2006-06-22
DE102004061080A1 (de) 2006-06-22
EP1827735A1 (de) 2007-09-05
WO2006063847A1 (de) 2006-06-22
ATE414579T1 (de) 2008-12-15
EP1827735B1 (de) 2008-11-19
ES2314751T3 (es) 2009-03-16
DE502005006026D1 (de) 2009-01-02
JP2008531281A (ja) 2008-08-14
PL1827735T3 (pl) 2009-04-30

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SMS DEMAG AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BAUSCH, JORG;FALKENRECK, UDO;SCHEMEIT, HANS-JURGEN;AND OTHERS;REEL/FRAME:019479/0606;SIGNING DATES FROM 20070416 TO 20070418

Owner name: SMS DEMAG AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BAUSCH, JORG;FALKENRECK, UDO;SCHEMEIT, HANS-JURGEN;AND OTHERS;SIGNING DATES FROM 20070416 TO 20070418;REEL/FRAME:019479/0606

AS Assignment

Owner name: SMS SIEMAG AKTIENGESELLSCHAFT, GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AG;REEL/FRAME:023725/0342

Effective date: 20090325

Owner name: SMS SIEMAG AKTIENGESELLSCHAFT,GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:SMS DEMAG AG;REEL/FRAME:023725/0342

Effective date: 20090325

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION