EP0142402A1 - Anlage zum horizontalen Stranggiessen von Metallen, insbesondere von Stahl - Google Patents

Anlage zum horizontalen Stranggiessen von Metallen, insbesondere von Stahl Download PDF

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Publication number
EP0142402A1
EP0142402A1 EP84401946A EP84401946A EP0142402A1 EP 0142402 A1 EP0142402 A1 EP 0142402A1 EP 84401946 A EP84401946 A EP 84401946A EP 84401946 A EP84401946 A EP 84401946A EP 0142402 A1 EP0142402 A1 EP 0142402A1
Authority
EP
European Patent Office
Prior art keywords
section
cross
mold
seal
joint
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Withdrawn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
EP84401946A
Other languages
English (en)
French (fr)
Inventor
Robert Alberny
Helmut Hackl
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Publication of EP0142402A1 publication Critical patent/EP0142402A1/de
Withdrawn legal-status Critical Current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
    • B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
    • B22D11/047—Means for joining tundish to mould

Definitions

  • the present invention relates to the continuous horizontal casting of metals or alloys, in particular steel.
  • the installations for horizontal continuous casting of steel essentially comprise a metallurgical casting container receiving the molten metal and provided at its lower part with a lateral outlet orifice situated opposite a bottomless mold, energetically cooled, arranged horizontally and whose format conditions that of the cast product.
  • the passage of the liquid metal from the container to the ingot mold takes place by means of a seal constituted by a body axially hollowed out to allow the circulation of the metal, and having excellent refractory properties, for example silicon nitride.
  • the present invention aims to avoid these drawbacks. More specifically, the invention relates to a horizontal continuous casting installation allowing the control of the start of solidification in the joint and the obtaining of a homogeneous solid metal with good sealing conditions between the joint and the mold.
  • the subject of the invention is an installation for horizontal continuous casting of metals, in particular steel, mainly comprising: a casting container provided at its lower part with a lateral outlet orifice; a bottomless ingot mold, energetically cooled, arranged horizontally - or substantially horizontally - and whose internal format defines that of the cast product, said ingot mold having its inlet end facing the outlet orifice of the container; and a seal intended to ensure the tight connection between the outlet orifice of the container and the inlet of the ingot mold, said seal being provided with an internal channel for the passage of liquid metal from the outlet orifice of the container into the ingot mold, installation characterized in that said seal consists of a shaped piece of refractory material axially hollowed out to provide the internal channel, said piece being formed of two parts contiguous having between them a difference in solid cross sections, the part with the largest solid cross section being disposed opposite the outlet orifice of the container, in that means are provided for cooling the part with the smallest solid cross section,
  • the end of the part with the smallest straight cross-section full of the seal is engaged in the inlet of the ingot mold so as to benefit from the cooling effect of the latter.
  • the passage of the liquid metal from the container to the ingot mold takes place via a communication channel 10 connecting the orifice 5 of the container to the inlet of the ingot mold.
  • This channel is formed in the seal 11 which, in this example, engages by its free end 12 in the inlet of the mold in the manner of an insert.
  • the seal 11 is wrapped in a thermal insulator 13 which is currently made of a fibrous material based on alumina and silica.
  • the seal 11 is chosen from silicon nitride, well known for its good refractory qualities.
  • the internal profile of the channel 10 formed in the joint 11 is uniform, at least in the part 15 of smaller solid cross section, and the internal cross section of the end 12 is equal to the internal cross section of the mold, so that the passage of the liquid metal has no discontinuity at the junction between the seal 11 and the mold 7.
  • the internal profile of the channel 10 is slightly divergent in the direction of casting.
  • the flaring of the channel 10 in the casting direction also makes it possible to compensate for any wear and tear which could occur on the walls of the channel 10.
  • the channel 10 has a slope of 10%, as well as this is usually done.
  • the solid cross section of the nose of the seal decreases regularly away from the head of the seal.
  • the head and the nose of the seal are preferably separated by a zone 16 of abrupt variation of solid cross section.
  • the horizontal continuous casting installation according to the invention ensures the start of this solidification in the joint.
  • means are provided for cooling the part of the smallest solid cross section. As we saw earlier, in this example, these means may advantageously be constituted by the cooling device of the mold 7 itself. Consequently, the first deposit of solid metal is favored in the portion of the channel 10 located in the nose of the joint.
  • the results obtained are due in part to the structural characteristics of the joint, ie unlike the solid straight sections between the head 14 and the nose 15 and in part to the cooling means with which the nose 15 is provided. so define the joint in two parts in the following functional way: a "retarding" part of solidification (the head) turned towards the side of the pouring vessel, followed by an “accelerating” part of solidification (the nose) ) placed next to the mold.
  • the dimensions of the gasket more particularly recommended are such that, the thickness AA 'of the end of the head 14 is equal to or greater than 15 mm, the thickness BB' of the end of the nose 15 is equal to or less than 5 mm and the total length AB of the joint, is preferably between 30 and 150 mm.
  • silicon nitride while being an excellent refractory material, also has a low thermal conductivity, but which should not be neglected if one wishes to guarantee for sure the start of solidification in the nose of the joint.
  • the thickness AA ' is 24 mm
  • the thickness BB' is 2 mm
  • the total length AB of the joint is 40 mm, including 28 mm for the length of the head 14 of the joint and 12 mm for the length of the joint nose.
  • results obtained are also due to the absence of discontinuity, or of detachment, in the part of the channel 10 in which the solidification of the metal is favored, namely in the nose of the joint and at the joint-ingot mold connection. .
  • the installation according to the invention ensures a regular start of the solidification of the molten metal, which has the main advantage, obtaining a homogeneous solid metal, free of the surface defects usually encountered.
  • the head 14 of the joint is, as can be seen in FIG. 1, wrapped in a thermal insulator 13 which, if necessary, contributes to avoiding an early initiation of solidification in this place.
  • the nose 15 of the seal is introduced into the inlet of the mold.
  • the cooling system of the mold is then judiciously used to generate a sufficiently large heat exchange flow in the terminal part of the seal nose to ensure the start of solidification.
  • This arrangement makes it possible to obtain suddenly the desired result without having to use additional cooling means in the casting installation.
  • the inlet of the ingot mold is advantageously shaped as a funnel 17 which closely matches the external surface of the end 12 to ensure good thermal contact between them. That said, it remains of course possible to provide a specific cooling system for the seal nose which will be adjusted independently of that of the mold.
  • the molten metal initially solidifies in the pipe formed in the joint, first in the nose of the joint where, once initiated, it continues regularly to become maximum in the mold where cooling is the most energetic.
  • the joint according to the invention makes it possible to obtain a metal solidified homogeneously by virtue of the initial conditions for regular solidification of the cast product, and to avoid any infiltration of metal at the junction of the joint with the ingot mold.
  • the invention finds its application for the horizontal continuous casting of all metals and alloys.
  • the length of the joint is in no way an essential or determining characteristic of the invention.
  • the lower limit of 30 mm recommended for a silicon nitride gasket can be further reduced if a refractory material having a thermal conductivity less than that of silicon nitride, for example alumina.
  • the refractory material constituting the seal is not necessarily silicon nitride.
  • a boron nitride gasket which, while being a good refractory, has a thermal conductivity close to that of silicon nitride.
  • an alumina gasket which, on the other hand, has a thermal conductivity significantly lower than that of silicon nitride.
  • a thickness BB 'of the seal head not exceeding 1 or 2 mm is recommended if its cooling is ensured by the cooling system of the ingot mold.
  • a person skilled in the art can easily determine the thicknesses of the parts of the largest solid cross section and of the smallest solid cross section in order to produce a joint according to the invention.
  • this axial passage must not have any format discontinuity with that of the mold, at least in the nose of the joint.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP84401946A 1983-10-14 1984-09-28 Anlage zum horizontalen Stranggiessen von Metallen, insbesondere von Stahl Withdrawn EP0142402A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8316361A FR2553317B1 (fr) 1983-10-14 1983-10-14 Joint pour installation de coulee continue horizontale des metaux notamment de l'acier et installation de coulee equipee de ce joint
FR8316361 1983-10-14

Publications (1)

Publication Number Publication Date
EP0142402A1 true EP0142402A1 (de) 1985-05-22

Family

ID=9293128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401946A Withdrawn EP0142402A1 (de) 1983-10-14 1984-09-28 Anlage zum horizontalen Stranggiessen von Metallen, insbesondere von Stahl

Country Status (4)

Country Link
EP (1) EP0142402A1 (de)
JP (1) JPS6099459A (de)
ES (1) ES8506484A1 (de)
FR (1) FR2553317B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0216840Y2 (de) * 1984-12-29 1990-05-10
JPS6238741A (ja) * 1985-08-13 1987-02-19 Nippon Kokan Kk <Nkk> 丸ビレツト用水平連続鋳造機におけるブレ−クリングの取付け方法
JPS6264454A (ja) * 1985-09-17 1987-03-23 Nippon Kokan Kk <Nkk> 角ビレツト用水平連続鋳造機におけるブレ−クリングの取付け方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344846A (en) * 1964-09-01 1967-10-03 Deutsche Edelstahlwerke Ag Apparatus for continuously horizontally casting high melting metals, particularly steel
GB1094651A (en) * 1963-07-09 1967-12-13 Davy & United Eng Co Ltd Method and apparatus for continuous casting
US3390716A (en) * 1964-11-27 1968-07-02 Deutsche Edelstahlwerke Ag Pouring spout and pouring head for the continuous casting of high melting metals, particularly steel
FR2077534A2 (de) * 1969-11-25 1971-10-29 Gen Motors Corp
FR2080898A2 (de) * 1970-01-07 1971-11-26 Ashmore Benson Pease & Co Ltd

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1094651A (en) * 1963-07-09 1967-12-13 Davy & United Eng Co Ltd Method and apparatus for continuous casting
US3344846A (en) * 1964-09-01 1967-10-03 Deutsche Edelstahlwerke Ag Apparatus for continuously horizontally casting high melting metals, particularly steel
US3390716A (en) * 1964-11-27 1968-07-02 Deutsche Edelstahlwerke Ag Pouring spout and pouring head for the continuous casting of high melting metals, particularly steel
FR2077534A2 (de) * 1969-11-25 1971-10-29 Gen Motors Corp
FR2080898A2 (de) * 1970-01-07 1971-11-26 Ashmore Benson Pease & Co Ltd

Also Published As

Publication number Publication date
JPS6099459A (ja) 1985-06-03
ES536698A0 (es) 1985-07-16
ES8506484A1 (es) 1985-07-16
FR2553317B1 (fr) 1986-08-14
FR2553317A1 (fr) 1985-04-19

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19860123

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Inventor name: ALBERNY, ROBERT

Inventor name: HACKL, HELMUT