EP0367024A1 - Dispositif pour la coulée continue de métaux, en particulier de l'acier - Google Patents

Dispositif pour la coulée continue de métaux, en particulier de l'acier Download PDF

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Publication number
EP0367024A1
EP0367024A1 EP89119336A EP89119336A EP0367024A1 EP 0367024 A1 EP0367024 A1 EP 0367024A1 EP 89119336 A EP89119336 A EP 89119336A EP 89119336 A EP89119336 A EP 89119336A EP 0367024 A1 EP0367024 A1 EP 0367024A1
Authority
EP
European Patent Office
Prior art keywords
mould
downstream
elements
ingot
sides
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
EP89119336A
Other languages
German (de)
English (en)
Other versions
EP0367024B2 (fr
EP0367024B1 (fr
Inventor
Stefano Arici
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 and C Officine Meccaniche SpA
Original Assignee
Danieli and C Officine Meccaniche SpA
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
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Application filed by Danieli and C Officine Meccaniche SpA filed Critical Danieli and C Officine Meccaniche SpA
Priority to AT89119336T priority Critical patent/ATE83410T1/de
Publication of EP0367024A1 publication Critical patent/EP0367024A1/fr
Application granted granted Critical
Publication of EP0367024B1 publication Critical patent/EP0367024B1/fr
Publication of EP0367024B2 publication Critical patent/EP0367024B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D11/05—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds into moulds having adjustable walls
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing

Definitions

  • This invention concerns the field of foundries and, to be more exact, an apparatus for the continuous casting of metals and, in particular but not only, steel and the formation of ingots, whether they be round or oval or have a square section or analogous sections.
  • the continuous casting to which this invention can be applied may have its casting axis vertical and straight, vertical and round or horizontal or almost horizontal.
  • the solidification takes place in the form of crystals, which grow perpendicularly to the walls of the main mould and downstream mould.
  • the ingot tends at a given moment to become detached form the guiding walls, with a resulting variation in the conditions of transmission of the heat and therefore of the cooling.
  • the resulting material therefore, comprises outer, intermediate and inner zones consisting of different crystals.
  • downstream moulds are in fact known which form ingots with a square section and downstream moulds are also known which form ingots with a round section;
  • the former downstream moulds consist of four or more elements or plates positioned according to the sides of a square and distanced at their corners of convergence, whereas the latter downstream moulds consist of shell elements arranged along a circumference.
  • the adjacent sides of the elements forming the downstream moulds are parallel to the direction of sliding of the metal and define clefts which extend along the ingot.
  • the metal solidifies along these strips more quickly than in the neighbouring zones and enhances the conditions that contribute to the variation of the structure and to impairing the homogeneous formation of the material.
  • the elements forming the known downstream moulds are normally kept in their working arrangement by means of springs, but the springs, when at work, do not make possible the variation and adjustment of the lateral thrusts on the ingot during its formation nor the correct self-adaptation of the containing elements to the movement and shrinkage of the metal.
  • the present invention aims, instead, to eliminate or at least to limit appreciably the above problems and shortcomings of the continuous casting of steel by means of improvements to the downstream mould itself and to the means which support move and thrust the elements forming the downstream mould.
  • the invention has also been designed for application to any mould already in operation.
  • the invention concerns an apparatus for the continuous casting of steel according to the main claim, while the dependent claims describe variants of the idea of the embodiment.
  • the invention is applied preferably and advantageously to downstream moulds for the casting of ingots having a round section but can be applied also to downstream moulds for the casting of ingots having a square section.
  • the invention is applied to straight as well as to curved downstream moulds for the continuous casting of any type of steel and metal in general.
  • the special features of this invention are therefore the provision of a mould immediately downstream of the main mould and consisting of movable, independent shell elements, the contiguous sides of which are not positioned parallel to the direction of movement of the metal, and consisting also of fluid-type actuators to operate the shell elements.
  • the actuators can be of a pneumatic or oleodynamic type.
  • the clefts which must not be eliminated and which exist between adjacent shell elements, have a disposition which is not parallel to, or else is like a spiral in relation to, the axis and surface of the ingot.
  • This arrangement therefore makes it possible to eliminate any preferred strip of surface solidifcation, to contain and regulate better and to make more uniform the cooling and solidification of the metallic mass, to make the crystallization homogeneous and to reduce the physical, structural and mechanical shortcomings cited above.
  • the individual shell elements are also enabled to stay always in contact with the ingot passing through.
  • the apparatus according to the invention is applied by means of a support plate 11 immediately downstream of a main ingot mould 10, which is known in itself; the apparatus comprises a downstream mould 12, pneumatic actuators 13 to actuate the downstream mould and nozzles 14 to deliver jets of water onto the surface of the downstream mould.
  • the latter consists of a plurality (four, for instance) of independent shell elements 15 able to move independently of each other and to align themselves; in this case the elements 15 are arranged in a circle (Fig.2) so as to define in conjunction a pipe 16 for the passage of metal coming from the main ingot mould 10, the pipe 16 being cylindrical or, preferably, tapered in a downstream direction.
  • each shell element 15 is not parallel to the axis of the pipe 16 and to the direction of displacement of the metal in the downstream mould 12.
  • each shell element 15 may be oblique, straight, curved, sinusoidal or in broken lines and define, together with the sides 17 of the neighbouring shell elements 15 (Fig.1), clefts 18, which are also oblique, so as to achieve during the casting the conditions described above and to enable the individual shell elements 15 to move and adapt themselves continuously in an independent manner.
  • the clefts 18 are continuous, while the shell elements 15 are independent.
  • Each shell element 15 is supported and positioned by a rocker lever 19, on which the shell element 15 is pivoted at 20 with the ability also to oscillate in a vertical plane.
  • the rocker lever 19 (Fig.1) in turn is pivoted at 21 between two housings 22 secured to the support plate 11 and is articulated at 23 to a pneumatic control actuator 13 in such a way that to movements of the lever 19 there correspond movements of self-alignment and opening of each shell element 15 independently of or at the same as the other shell elements.
  • each shell element 15 on its pivot 20 is restricted, instead, by abutment screws 24 secured to the housings 22 (Fig.1).
  • Each piston 25 has the special feature of being equipped with a calibrated bore 27 for the regulated passage of air from the chamber under pressure to the chamber not under pressure within the cylinder 26 and from the cylinder 26 to the return duct of the pneumatic circuit.
  • the pneumatic actuators 13 enable the shell elements 15 to be actuated and the thrusts existing at any moment to be possibly modified and make possible also any correction required for the operations during the casting.
  • the pneumatic actuators 13 enable the shell elements 15 to be moved when required in the direction of their separation and also make use of the possibility of oscillations on the pivot 20 of the elements 15 so as to facilitate insertion of a starter bar in the downstream mould 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Manufacture And Refinement Of Metals (AREA)
EP89119336A 1988-10-31 1989-10-18 Dispositif pour la coulée continue de métaux, en particulier de l'acier Expired - Lifetime EP0367024B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89119336T ATE83410T1 (de) 1988-10-31 1989-10-18 Vorrichtung zum stranggiessen von metallen, insbesondere von stahl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT523288 1988-10-31
IT8805232A IT1226913B (it) 1988-10-31 1988-10-31 Attrezzatura per la colata continua dell'acciaio.

Publications (3)

Publication Number Publication Date
EP0367024A1 true EP0367024A1 (fr) 1990-05-09
EP0367024B1 EP0367024B1 (fr) 1992-12-16
EP0367024B2 EP0367024B2 (fr) 1997-09-24

Family

ID=11119715

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89119336A Expired - Lifetime EP0367024B2 (fr) 1988-10-31 1989-10-18 Dispositif pour la coulée continue de métaux, en particulier de l'acier

Country Status (7)

Country Link
EP (1) EP0367024B2 (fr)
AT (1) ATE83410T1 (fr)
DE (1) DE68903926T3 (fr)
ES (1) ES2036779T5 (fr)
IT (1) IT1226913B (fr)
RU (1) RU1838039C (fr)
UA (1) UA12305A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492176A1 (fr) * 1990-11-29 1992-07-01 Kawasaki Jukogyo Kabushiki Kaisha Dispositif de coulée continue horizontale avec lingotière réglable
EP0686444A1 (fr) 1994-06-06 1995-12-13 DANIELI & C. OFFICINE MECCANICHE S.p.A. Partie en aval d'une lignotière pour coulée continue ayant des faces latérales minces

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB761401A (en) * 1954-05-17 1956-11-14 Rossi Irving Device for use in the art of continuous casting of metals
DE1252371B (de) * 1967-10-19 Valentine Tarqumee Wassenaar (Niederlande), Royal James Scovill jun , Ogden Dunes Ind (V St. A) Kuhlvorrichtung beim Stranggießen
US3580327A (en) * 1968-07-15 1971-05-25 Georgy Lukich Khim Continuous casting mold
US3882924A (en) * 1972-12-18 1975-05-13 Mitsubishi Heavy Ind Ltd Cast piece supporting apparatus for a continuous casting machine
FR2445744A1 (fr) * 1979-01-04 1980-08-01 Clesid Sa Perfectionnement aux machines de coulee continue
US4669526A (en) * 1985-06-20 1987-06-02 Sms Concast Inc. Remotely adjustable continuous casting mold
EP0268143A2 (fr) * 1986-11-19 1988-05-25 Concast Standard Ag Procédé et lingotière pour la coulée continue de lingots métalliques, en particulier de lingots d'acier

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1252371B (de) * 1967-10-19 Valentine Tarqumee Wassenaar (Niederlande), Royal James Scovill jun , Ogden Dunes Ind (V St. A) Kuhlvorrichtung beim Stranggießen
GB761401A (en) * 1954-05-17 1956-11-14 Rossi Irving Device for use in the art of continuous casting of metals
US3580327A (en) * 1968-07-15 1971-05-25 Georgy Lukich Khim Continuous casting mold
US3882924A (en) * 1972-12-18 1975-05-13 Mitsubishi Heavy Ind Ltd Cast piece supporting apparatus for a continuous casting machine
FR2445744A1 (fr) * 1979-01-04 1980-08-01 Clesid Sa Perfectionnement aux machines de coulee continue
US4669526A (en) * 1985-06-20 1987-06-02 Sms Concast Inc. Remotely adjustable continuous casting mold
EP0268143A2 (fr) * 1986-11-19 1988-05-25 Concast Standard Ag Procédé et lingotière pour la coulée continue de lingots métalliques, en particulier de lingots d'acier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0492176A1 (fr) * 1990-11-29 1992-07-01 Kawasaki Jukogyo Kabushiki Kaisha Dispositif de coulée continue horizontale avec lingotière réglable
US5355936A (en) * 1990-11-29 1994-10-18 Kawasaki Jukogyo Kabushiki Kaisha Adjustable mold for horizontal continuous casting apparatus
EP0686444A1 (fr) 1994-06-06 1995-12-13 DANIELI & C. OFFICINE MECCANICHE S.p.A. Partie en aval d'une lignotière pour coulée continue ayant des faces latérales minces

Also Published As

Publication number Publication date
ES2036779T3 (es) 1993-06-01
UA12305A1 (uk) 1996-12-25
IT8805232A0 (it) 1988-10-31
IT1226913B (it) 1991-02-22
EP0367024B2 (fr) 1997-09-24
EP0367024B1 (fr) 1992-12-16
DE68903926D1 (de) 1993-01-28
ES2036779T5 (es) 1997-12-16
RU1838039C (ru) 1993-08-30
DE68903926T3 (de) 1998-02-05
DE68903926T2 (de) 1993-07-01
ATE83410T1 (de) 1993-01-15

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