EP2572812A1 - Gussanordnung für den durchgehenden Guss - Google Patents

Gussanordnung für den durchgehenden Guss Download PDF

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Publication number
EP2572812A1
EP2572812A1 EP11182175A EP11182175A EP2572812A1 EP 2572812 A1 EP2572812 A1 EP 2572812A1 EP 11182175 A EP11182175 A EP 11182175A EP 11182175 A EP11182175 A EP 11182175A EP 2572812 A1 EP2572812 A1 EP 2572812A1
Authority
EP
European Patent Office
Prior art keywords
mold
cooling jacket
assembly
tubular structure
intermediate tubular
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.)
Granted
Application number
EP11182175A
Other languages
English (en)
French (fr)
Other versions
EP2572812B1 (de
Inventor
Subroto Kumar Das
Gerald Hrazdera
Amit Pal
Johann Poeppl
Thomas PÜHRINGER
Roger Steins
Heinrich Thoene
Franz Wimmer
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.)
Primetals Technologies Austria GmbH
Original Assignee
Siemens VAI Metals Technologies GmbH Austria
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 Siemens VAI Metals Technologies GmbH Austria filed Critical Siemens VAI Metals Technologies GmbH Austria
Priority to EP20110182175 priority Critical patent/EP2572812B1/de
Priority to CN 201220485047 priority patent/CN203091692U/zh
Publication of EP2572812A1 publication Critical patent/EP2572812A1/de
Application granted granted Critical
Publication of EP2572812B1 publication Critical patent/EP2572812B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • B22D11/055—Cooling the moulds

Definitions

  • the present invention relates to continuous casting.
  • the present invention relates to a mold assembly enabling uniform cooling during continuous casting.
  • Continuous casting is widely used to produce cast products such as billets, blooms, thick slabs/ingots, thin slabs, strips, and the like.
  • molten metal is poured into an open-ended mold that cools and solidifies a peripheral region of the molten metal to form a metal strand.
  • the metal strand is continuously withdrawn from the bottom of the mold while the molten metal is being continuously poured from the top.
  • the solid shell exiting the mold should form a stable metal strand that should have adequate mechanical strength to support the liquid metal core.
  • the mold is cooled using a cooling fluid to effect the formation of a solid shell in the peripheral region of the molten metal.
  • the heat transfer from the molten metal at metal-mold interface leads to an initial solidification and subsequent growth of the solid shell against the mold.
  • One of the objectives while designing a mold assembly is to match the rate of heat removal at the surface with the internal supply of heat from the molten metal core such that a surface temperature of the metal strand is reduced monotonically and uniformly along the peripheral region of the molten metal.
  • the quality of the cast metal product and the production rates are directly dependent on the efficiency of the cooling process. Evidently, production of cast metal products of high quality at faster rates can be achieved through increasing the efficiency of the cooling process.
  • Non-uniform cooling of the metal strand leads to differential thickness, metallurgical structure and strength of the solid shell in the metal strand. Moreover, non-uniform cooling also results in differential thermal expansion and shrinkage in different regions, which in turn lead to thermal stress and strain inside the solid shell. These undesirable effects often lead to cracks or break-outs in the metal strand.
  • one of the challenges while designing the mold assembly is to ensure efficient and uniform cooling of the metal strand across the peripheral region. It is imperative that the temperature of the mold is effectively regulated to ensure sufficient mechanical strength and stability of the metal strand exiting the mold. Moreover, it is necessary to ensure uniform cooling of the inner surface of the mold along the circumference to effect uniform cooling of the metal strand along the peripheral region.
  • a cooling jacket is attached to the mold.
  • the mold, along with the attached cooling jacket, is placed in housing provided with inlet and outlet ports such that a cooling fluid may be flowed continuously through the space enclosed between the mold and the cooling jacket.
  • the cooling jacket interfaces with the housing to partition the enclosed space into two chambers, which are interconnected through the flow space formed between the mold and the cooling jacket.
  • a suitable sealing means is disposed between an interface of the cooling jacket and the housing to prevent leakage of the cooling fluid from one chamber to another.
  • the cooling jacket is aligned with respect to the mold to achieve uniform spacing between an outer wall of the mold and an inner wall of the cooling jacket along the circumference such that a uniform temperature is maintained along the circumference of the mold.
  • the patent discloses a mold unit for insertion into a water tank in a machine for continuous casting.
  • the mold unit includes a mold tube, a pair of flanges, and a cooling jacket.
  • the mold tube is resiliently held between the pair of flanges.
  • the cooling jacket surrounds the mold tube such that there is formed a flow space between the cooling jacket and the mold tube.
  • a flange extends radially outwardly from the cooling jacket.
  • a plurality of rods interconnect the flanges in the pair of flanges and the flange extending from the cooling jacket such that the cooling jacket is suitably positioned with respect to the mold tube.
  • an object of the present invention is to provide a mold assembly suitable for use in continuous casting such that efficient cooling of molten metal is enabled.
  • a mold assembly suitable for use in continuous casting includes a mold, a cooling jacket, an intermediate tubular structure, and a housing assembly.
  • the mold delimits a mold cavity for flow of molten metal.
  • the cooling jacket surrounds the mold such that a flow gap is formed between the mold and the cooling jacket. At least one of the mold and the cooling jacket is provided with adjusting means for adjusting a dimension of the flow gap between the mold and the cooling jacket along a radial direction.
  • the intermediate tubular structure surrounds the cooling jacket and is coupled thereto through first coupling means disposed therein for coupling the cooling jacket and the intermediate tubular structure.
  • the housing assembly encloses the mold such that an enclosed space is formed between the housing assembly and the mold.
  • the cooling jacket and the intermediate tubular structure are disposed within the enclosed space.
  • the housing assembly is coupled to the intermediate tubular structure through second coupling means disposed therein for coupling the intermediate tubular structure and the housing assembly.
  • the mold assembly of the present invention facilitates improved alignment between the mold and the cooling jacket to ensure uniform flow gap along a circumference of the mold.
  • the uniform flow gap facilitates efficient heat transfer from the incipient metal strand inside the mold towards the outside, and thereby advantageously eliminates thermal stress and strain inside the solid shell of the resulting metal strand; and hence, mitigates the risk of cracks or break-outs in the resulting metal strand exiting the mold.
  • an alignment of the mold and the cooling jacket to ensure uniform flow gap along a circumference of the mold neither leads to undesirable mechanical forces on the mold nor renders an interface between the cooling jacket and the intermediate tubular structure and an interface between the intermediate tubular structure and the housing assembly, susceptible to leakage.
  • the first coupling means include a coupling flange extending outwards from the cooling jacket. This technical feature provides the first coupling means for coupling the cooling jacket and the intermediate tubular structure.
  • the second coupling means couple the intermediate tubular structure to the housing assembly in a non-rigid manner.
  • the second coupling means include an engaging flange extending outwards from the intermediate tubular structure and a supporting structure formed in the housing assembly such that the engaging flange rests on the supporting structure in a non-rigid manner.
  • the mold assembly includes first and second sealing means.
  • the first sealing means provide a leakage-resistant coupling between the cooling jacket and the intermediate tubular structure.
  • the second sealing means provide a leakage-resistant coupling between the intermediate tubular structure and the housing assembly.
  • the mold assembly includes third coupling means for coupling the cooling jacket to the housing assembly.
  • the third coupling means are such that the cooling jacket is displaceable with respect to the mold along a longitudinal direction.
  • the cooling jacket, the first coupling means, the intermediate tubular structure and the second coupling means partition the enclosed space into an inlet chamber and an outlet chamber such that the inlet chamber and the outlet chamber are interconnected through the flow gap.
  • a cooling fluid flows from the inlet chamber to the outlet chamber through the flow gap.
  • molten metal flows from a ladle into a small intermediate vessel known as a tundish.
  • the molten metal then flows from the tundish through a submerged nozzle according to the position of a stopper-rod or a slide-gate or an open-pour nozzle, to enter a mold assembly.
  • the mold assembly includes a mold, which is an open-ended tubular structure, which is cooled using a cooling fluid circulated through various elements of the mold assembly surrounding the mold.
  • the peripheral region of the molten metal loses heat to the cooled walls of the mold to form a metal strand with a thin solid shell.
  • a drive rolls assembly located below the mold assembly continuously withdraws the metal strand out of the mold assembly.
  • the metal strand exiting the mold should have adequate mechanical strength to support the liquid metal core.
  • the mold assembly should be efficiently cooled to satisfy this requirement.
  • the present invention provides an improved mold assembly suitable for use in continuous casting as described above.
  • FIG 1 and FIG 2 illustrate a first perspective view and a second perspective view respectively of the mold assembly 100 in accordance with an embodiment of the present invention.
  • the mold assembly 100 includes an inlet 102, outlet 104, inlet 106 and outlet 108.
  • FIG 1 also illustrates metal strand 110 exiting the mold assembly 100.
  • the molten metal enters the mold assembly 100 through the inlet 102.
  • a peripheral region of the molten metal gets cooled in the mold assembly 100 such that a metal strand 110 with a molten core and a solid shell is formed.
  • the metal strand 110 exits the mold assembly 100 from the outlet 104.
  • the mold assembly 100 is cooled by circulating a cooling fluid through an enclosed space inside the mold assembly 100.
  • the cooling fluid enters the mold assembly 100 through the inlet 106 and exits the mold assembly 100 from the outlet 108.
  • metal is intended to refer to any material, such as pure metals and any alloys thereof such as steel and so on, and the like, that is suitable for forming a cast product such as billets, blooms, thick slabs/ingots, thin slabs, strips, and the like.
  • FIG 3 illustrates a top view of the mold assembly 100 in accordance with an embodiment of the present invention.
  • FIGS 4 and 5 will illustrate longitudinal sectional views of the mold assembly 100 along A-A' and B-B' shown in FIG 3 .
  • FIGS 4 and 5 illustrate longitudinal sectional views of the mold assembly 100 respectively along A-A' and B-B' shown in FIG 3 .
  • FIG 6 illustrates a longitudinal sectional view of the mold assembly 100 along C-C' shown in FIG 4 .
  • the mold assembly 100 includes a mold 202, a cooling jacket 204, an intermediate tubular structure 206, and a housing assembly 208.
  • the mold 202 is an open-ended tubular structure which delimits a mold cavity.
  • the mold cavity defines a longitudinal casting direction along which molten metal flows during continuous casting.
  • the mold 202 shown in FIGS 4 through 6 has a curved development suitable for curved apron casting set-up. Further, the mold 202 has a substantially square cross-section. However, in various alternative embodiments of the present invention, the mold 202 may be straight and may have any desired cross-section in accordance with a desired cross-section of the cast product.
  • the cooling jacket 204 has a cross-sectional shape that corresponds to the cross-sectional shape of the mold 202.
  • the cooling jacket 204 has such dimensions that the cooling jacket 204 surrounds the mold 202 such that a flow gap 210 is formed between the mold 202 and the cooling jacket 204.
  • various structural elements such as baffles and the like, may be disposed on an inner surface of the cooling jacket 204 to facilitate uniform distribution of the cooling fluid.
  • Such structural elements are well-known in the art and are not being described in detail for the sake of brevity.
  • the cooling jacket 204 is coupled to the housing assembly 208 through third coupling means 218.
  • the housing assembly 208 includes a top covering flange 230 with such cross-section and dimensions that is suitable for receiving the top portion of the mold 202.
  • the top covering flange 230 is provided with a pair of brackets 232 symmetrically disposed on either side of a central axis 'X' of the mold 202.
  • the cooling jacket 204 is provided with lugs 234 on diametrically opposite sides such that the cooling jacket 204 may be coupled to the brackets 232.
  • Each bracket 232 includes a through-hole elongated along a longitudinal direction.
  • the cooling jacket 204 is coupled to the brackets 232 through use of fasteners 236.
  • the cooling jacket 204 may be displaced with respect to the mold 202 and suitably positioned along a longitudinal direction.
  • the third coupling means 218 are such that the cooling jacket 204 is suspended from the housing assembly 208.
  • the third coupling means 218 permit movement of the cooling jacket 204 in any direction along a transverse plane orthogonal to planes A-A' and B-B'.
  • At least one of the mold 202 and the cooling jacket 204 is attached to adjusting means 212 that enable adjustment of a dimension of the flow gap 210 along a radial direction with respect to central axis 'X'.
  • the adjusting means 212 include one or more spacer bolts disposed along the circumference of the cooling jacket 204 is a suitable manner.
  • the intermediate tubular structure 206 surrounds the cooling jacket 204. At least one of the cooling jacket 204 and the intermediate tubular structure 206 are provided with a first coupling means 214.
  • the first coupling means 214 include a coupling flange 220. The coupling flange 220 extends outwards from the cooling jacket 204.
  • the first coupling means 214 include a coupling flange extending inwards from the intermediate tubular structure 206.
  • the first coupling means 214 further include a first sealing means 222.
  • the first sealing means 222 is disposed at an interface of the coupling flange 220 and the intermediate tubular structure 206 to ensure that the corresponding interface is leakage-resistant.
  • the first sealing means 222 include an o-ring.
  • the region where the first coupling means 214 are disposed relative to longitudinal dimensions of the cooling jacket 204 and the intermediate tubular structure 206 will determine the relative longitudinal position of the cooling jacket 204 and the intermediate tubular structure 206.
  • the housing assembly 208 surrounds the intermediate tubular structure 206. At least one of the intermediate tubular structure 206 and the housing assembly 208 are provided with a second coupling means 216 for coupling thereof.
  • the intermediate tubular structure 206 is provided with an engaging flange 224 and the housing assembly 208 is provided with a supporting structure 226. The engaging flange 224 rests on the supporting structure 226.
  • the second coupling means 216 provides a non-rigid coupling between the intermediate tubular structure 206 and the housing assembly 208. This facilitates minimizing any undesirable mechanical forces on the mold 202.
  • a second sealing means 228 is disposed at an interface of the intermediate tubular structure 206 and the housing assembly 208. In an exemplary embodiment of the present invention, the second sealing means 228 includes an o-ring.
  • the housing assembly 208 encloses the mold 202.
  • the housing assembly 208 includes openings formed in a top portion and a bottom portion with such cross-section and dimensions that it is suitable for receiving top and bottom portions of the mold 202 respectively.
  • the mold 202 is rigidly attached to the housing assembly 208 through additional flanges and bolts arrangement and a sealing means.
  • the mold 202 and the housing assembly 208 form an enclosed space.
  • the enclosed space includes the cooling jacket 204 and the intermediate tubular structure 206.
  • the inlet and the outlet chambers 238 and 240 are interconnected through the flow gap 210.
  • the cooling fluid enters the inlet chamber 238 through the inlet 106 under pressurized condition.
  • the cooling fluid subsequently flows through the flow gap 210 in a direction substantially counter to a direction of flow of molten metal in the mold 202.
  • the cooling fluid exits the flow gap 210 to enter into the outlet chamber 240 and eventually, is removed from the enclosed space through the outlet 108.
  • the flow of cooling fluid through the enclosed space is indicated through arrows marked in FIGS 4 through 6 .
  • FIG 7 illustrates a transverse sectional view of the mold assembly 100 along D-D' shown in FIG 4 .
  • FIG 7 is intended to illustrate the flow gap 210 and the adjusting means 212 disposed along a circumference of the mold 202.
  • Various other elements of the mold assembly 100 shown in FIG 7 have already been described in detail in conjunction with the foregoing figures.
  • the mold assembly of the present invention facilitates improved alignment between the mold and the cooling jacket to ensure uniform flow gap along a circumference of the mold.
  • the uniform flow gap facilitates efficient heat transfer from the incipient metal strand inside the mold towards the outside, thereby advantageously eliminating thermal stress and strain inside the solid shell of the resulting metal strand; and hence, mitigating the risk of cracks or break-outs in the resulting metal strand after exit from the mold.
  • the cooling jacket in the mold assembly of the present invention may be adjusted not only in a transverse direction (i.e. in a plane perpendicular the casting direction) but also in a longitudinal plane.
  • the mold assembly enables a fully-floating design of the cooling jacket attached to the mold such that the flexibility for adjusting the cooling jacket with respect to the mold is increased manifold.
  • the mold assembly in accordance with the present invention provides a cooling jacket that interfaces with the housing assembly through an intermediate tubular structure.
  • the intermediate tubular structure through its coupling to the cooling jacket on one side and the housing assembly on the other side, partitions the enclosed space between the mold and the housing assembly into an inlet chamber and an outlet chamber, which are interconnected through the flow gap formed between the cooling jacket and the mold.
  • an alignment of the mold and the cooling jacket to ensure uniform flow gap along a circumference of the mold does not lead to any undesirable mechanical forces on the mold. Furthermore, owing to the inventive design of the mold assembly in accordance with the present invention, an alignment of the mold and the cooling jacket does not render an interface between the cooling jacket and the intermediate tubular structure and an interface between the intermediate tubular structure and the housing assembly, susceptible to leakage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
EP20110182175 2011-09-21 2011-09-21 Gussanordnung für den durchgehenden Guss Not-in-force EP2572812B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20110182175 EP2572812B1 (de) 2011-09-21 2011-09-21 Gussanordnung für den durchgehenden Guss
CN 201220485047 CN203091692U (zh) 2011-09-21 2012-09-21 用于连续铸造的模具组件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110182175 EP2572812B1 (de) 2011-09-21 2011-09-21 Gussanordnung für den durchgehenden Guss

Publications (2)

Publication Number Publication Date
EP2572812A1 true EP2572812A1 (de) 2013-03-27
EP2572812B1 EP2572812B1 (de) 2014-11-05

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EP20110182175 Not-in-force EP2572812B1 (de) 2011-09-21 2011-09-21 Gussanordnung für den durchgehenden Guss

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EP (1) EP2572812B1 (de)
CN (1) CN203091692U (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018130698A1 (de) * 2018-12-03 2020-06-04 Gautschi Engineering Gmbh Walzbarren-Kokille für den Strangguss von Aluminium und Aluminiumlegierungen
RU2784033C1 (ru) * 2018-12-03 2022-11-23 Кастхауз Революшн Центер Гмбх Форма для непрерывного литья слитков для прокатки из алюминия и алюминиевых сплавов

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104190909A (zh) * 2014-09-26 2014-12-10 东莞台一盈拓科技股份有限公司 非晶合金锭的连续生产装置及连续生产方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031936B (de) * 1955-03-30 1958-06-12 Eisenwerke Gelsenkirchen Ag Gekuehlte Stranggiesskokille
GB954330A (en) * 1961-10-28 1964-04-02 Boehler & Co Ag Geb Improvements in or relating to moulds for continuous casting
US3527287A (en) * 1967-11-14 1970-09-08 Concast Inc Continuous-casting mold assembly
DE2448275A1 (de) * 1973-10-19 1975-04-24 Siderurgie Fse Inst Rech Kokille zum kontinuierlichen vergiessen von metall
DE2914385A1 (de) * 1978-04-17 1979-10-25 Siderurgie Fse Inst Rech Von einem kuehlmittel durchstroemte stranggusskokille
FR2442092A1 (fr) * 1978-11-22 1980-06-20 Rotelec Sa Lingotiere de coulee continue equipee interieurement d'un organe electrique
DE3207149C1 (de) * 1982-02-27 1983-07-07 Mannesmann AG, 4000 Düsseldorf Stranggiesskokille fuer fluessige Metalle
EP0263779A2 (de) * 1986-10-10 1988-04-13 MANNESMANN Aktiengesellschaft Einrichtung zum kontinuierlichen Giessen von geschmolzenem Metall
WO2007096420A2 (en) * 2006-02-24 2007-08-30 Danieli & C. Officine Meccaniche S.P.A. Crystalliser holding device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031936B (de) * 1955-03-30 1958-06-12 Eisenwerke Gelsenkirchen Ag Gekuehlte Stranggiesskokille
GB954330A (en) * 1961-10-28 1964-04-02 Boehler & Co Ag Geb Improvements in or relating to moulds for continuous casting
US3527287A (en) * 1967-11-14 1970-09-08 Concast Inc Continuous-casting mold assembly
DE2448275A1 (de) * 1973-10-19 1975-04-24 Siderurgie Fse Inst Rech Kokille zum kontinuierlichen vergiessen von metall
DE2914385A1 (de) * 1978-04-17 1979-10-25 Siderurgie Fse Inst Rech Von einem kuehlmittel durchstroemte stranggusskokille
FR2442092A1 (fr) * 1978-11-22 1980-06-20 Rotelec Sa Lingotiere de coulee continue equipee interieurement d'un organe electrique
DE3207149C1 (de) * 1982-02-27 1983-07-07 Mannesmann AG, 4000 Düsseldorf Stranggiesskokille fuer fluessige Metalle
US4807691A (en) 1982-02-27 1989-02-28 Mannesmann Ag Mold for continuous casting of metal
EP0263779A2 (de) * 1986-10-10 1988-04-13 MANNESMANN Aktiengesellschaft Einrichtung zum kontinuierlichen Giessen von geschmolzenem Metall
WO2007096420A2 (en) * 2006-02-24 2007-08-30 Danieli & C. Officine Meccaniche S.P.A. Crystalliser holding device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018130698A1 (de) * 2018-12-03 2020-06-04 Gautschi Engineering Gmbh Walzbarren-Kokille für den Strangguss von Aluminium und Aluminiumlegierungen
DE102018130698B4 (de) 2018-12-03 2021-10-21 Casthouse Revolution Center Gmbh Walzbarren-Kokille für den Strangguss von Aluminium und Aluminiumlegierungen
US11407026B2 (en) 2018-12-03 2022-08-09 Casthouse Revolution Center Gmbh Rolling ingot mould for the continuous casting of aluminium and aluminium alloys
RU2784033C1 (ru) * 2018-12-03 2022-11-23 Кастхауз Революшн Центер Гмбх Форма для непрерывного литья слитков для прокатки из алюминия и алюминиевых сплавов

Also Published As

Publication number Publication date
CN203091692U (zh) 2013-07-31
EP2572812B1 (de) 2014-11-05

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