EP0107068A1 - Verfahren zum horizontalen Stranggiessen von Metallen, insbesondere von Stahl - Google Patents

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

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Publication number
EP0107068A1
EP0107068A1 EP83109549A EP83109549A EP0107068A1 EP 0107068 A1 EP0107068 A1 EP 0107068A1 EP 83109549 A EP83109549 A EP 83109549A EP 83109549 A EP83109549 A EP 83109549A EP 0107068 A1 EP0107068 A1 EP 0107068A1
Authority
EP
European Patent Office
Prior art keywords
mold
steel
strands
pouring
strand
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Withdrawn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
EP83109549A
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German (de)
English (en)
French (fr)
Inventor
Carl Langner
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.)
Concast Inc
Original Assignee
Concast 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 Concast Inc filed Critical Concast Inc
Publication of EP0107068A1 publication Critical patent/EP0107068A1/de
Withdrawn legal-status Critical Current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
    • B22D11/04—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
    • B22D11/0455—Bidirectional horizontal casting

Definitions

  • the invention relates to a method for the horizontal continuous casting of metals, in particular steel, the steel being introduced from above from a casting vessel through a pouring opening of a horizontal continuous casting mold and partially solidified strands being conveyed from opposite outlet openings of mold cavities in the opposite direction, further cooled and guided as well as a device for this.
  • a continuous casting mold is usually oscillated in order to pull out a strand without interference and to achieve a satisfactory surface quality.
  • an upstream, fixed pouring vessel e.g. a tundish from which the metal is laterally introduced into the horizontal mold must therefore be provided with a space that allows this oscillation. This gap is difficult to seal and also gives up metallurgical problems.
  • This method has the disadvantage that the two strands formed are connected to one another via a common strand shell, and when the strands are pulled out, the strand shell formed in the mold has to be torn off at an undetermined location.
  • the movement of the pouring nozzle is difficult to control, so that uneven solidification and strand shell formation within the mold occurs. For these reasons, reliable casting does not appear to be possible.
  • the difficulties with regard to undesired strand shell formation between two strands drawn in the opposite direction should be avoided, so that the strands can be drawn off simultaneously and independently of one another with a mold with two opposite outlet openings.
  • the difficulties that can occur in the transition area from oscillating horizontal mold to upstream casting vessel, such as metal leakage, should also be avoided.
  • Another object of the invention is to oscillate only small masses in order to be able to keep the oscillation devices inexpensive. Furthermore, the amount of metal flowing out in the event of a breakthrough should be kept as small as possible.
  • This object is achieved in that the formation of a strand shell connecting the strands is prevented in the direct inflow region into the mold, two strands are formed simultaneously by cooling the inserted steel and these are pulled out in two opposite directions, the mold being oscillated.
  • the liquid steel is introduced from an upstream pouring vessel, for example a tundish, using a pouring tube, the outlet openings of which are below the bath level of the mold.
  • the position of the pouring tube relative to the mold wall and the hot, flowing steel prevent the formation of an undesired strand shell, which would otherwise connect the two strands, and the pouring tube is positioned so that it is sufficiently hot in this inflow area, high above it Steel lying at the liquidus temperature flows out in the direction of the mold wall.
  • a so-called "hot wall” effect ie a hot mold wall, is achieved, as a result of which the strand shell formation is suppressed.
  • the pouring tube can have several outlet openings, from which the steel with sufficient intensity and temperature emerges in order to introduce enough heat in the space between the two strands formed to keep the mold wall hot.
  • the cooled mold removes so much heat from the steel that, independently of one another, two strands can form and, at the same time, can be discharged in the opposite direction without tearing off a strand shell.
  • the pull-out speed of the two strands can vary.
  • the direct inflow area is the, approximately disc-shaped section of the mold transverse to its longitudinal axis at which the metal introduced under the bath level of the mold emerges from the pouring tube and reaches, seen in the direction of the strand extraction, until just after the beginning of the upper mold wall.
  • the above-mentioned "hot-wall" effect prevents the formation of strand shells along the circumference of a strand cross section in a vertical plane in this area.
  • radially acting forces are generated in the immediate inflow area, which are directed against the ferrostatic pressure of the inserted steel in the mold and constrict the steel in the mold. These forces can act via an electromagnetic field which is generated around the mold by means of an electromagnetic coil. Due to the constriction of the metal in the immediate inflow area, the steel comes out of contact with the mold wall. When the steel is lifted off the mold wall, a gap is formed in which additives, e.g. a casting powder, can be added.
  • additives e.g. a casting powder
  • inert gas under pressure which acts on the bath level from above, can compensate for the ferrostatic pressure.
  • the pouring tube can have at least one outlet opening directed against the lower mold wall, but advantageously two additional openings directed against the lateral mold wall are also provided.
  • the electromagnetic coil for sealing can either be arranged only in the area of the pouring opening of the horizontal mold or also around the mold.
  • opposing strand shells can be brought into contact with one another or pressed against one another. This can advantageously be done by lifting the mold with parts of the strand guide and secondary cooling directly adjoining it, or by suitable pressing means, such as punches, rollers or scissor-like means, which extend from at least two sides of the strand are moved against each other.
  • the device according to the invention is characterized in that an electromagnetic coil is arranged for generating electromagnetic forces which act in the region of the pouring opening against the ferrostatic pressure of the steel introduced into the mold, in such a way that a pouring tube is positioned in the mold in such a way that it cooperates with A hot mold wall is created in the mold cavity in the inflow area between the two strands, which prevents the formation of a strand shell between these strands and that an oscillation device is provided for essentially horizontally oscillating the mold.
  • the pouring tube is positioned or the outlet openings dimensioned such that the above-mentioned “hot wall” effect occurs in the inflow region and the formation of a coherent strand shell connecting the two strands formed is prevented.
  • the electromagnetic coil which is arranged in the region of the pouring opening, is acted upon electrically in such a way that electromagnetic forces are generated which constrict the steel while keeping it away from the mold wall.
  • a supply of casting powder can advantageously be provided in the area between the two strands.
  • the oscillation device of the mold advantageously oscillates with a lifting height that is smaller than the distance between the pouring tube and the adjacent mold wall.
  • the metal in particular Steel, from a first pouring vessel, for example a ladle 1, via a ladle pouring tube 2 into another pouring vessel, for example a tundish 3.
  • the metal flow between the pan 1 and the tundish 3 can be regulated by known means, not shown, such as stoppers or sliders.
  • a pouring tube 4 attached to the tundish 3 the steel is introduced from above into a mold 5 which extends horizontally in its entirety to produce square billets measuring 160 x 160 mm. If necessary, a plurality of molds can also be loaded with steel by means of a tundish.
  • the mold 5 has a pouring opening 20 on its upper wall 22, as a result of which the pouring tube 4 extends in the direction of the lower mold wall 24.
  • the mold also has two opposing mold cavities 26 and 28, in which two strands 30 and 32 form simultaneously.
  • the wall 6 of the mold forming the mold cavity consists of a good heat-conducting metal, preferably copper.
  • the pouring opening 20 lies with the upper mold wall 22 in approximately the same plane. Furthermore, the mold cavities 26 and 28 are arranged essentially coaxially and extend essentially linearly to the two outlet openings of the mold 5.
  • the pouring opening 20 is dimensioned such that not only the pouring tube 4 can be received, but also a horizontal oscillation of the mold 5 the oscillation device 34 is possible without damaging the pouring tube.
  • the partially solidified strands 30 and 32 are simultaneously pulled out in two opposite directions by pulling devices, for example driven pulling rollers 9. If desired, the pull-out devices assigned to the two strands can operate at different pull-out speeds. It is clear that too When the casting begins, the two mold cavities of the mold are closed by so-called cold strands to enable casting and removal. Such cold start strands are well known in the art and are therefore not described further.
  • strand guide 36 consisting of rollers 38.
  • Suitable secondary cooling e.g. arranged in the form of spray nozzles 40 to promote the further solidification of the strand.
  • the mold 5 is oscillated by the oscillation device 34.
  • a substantially horizontal oscillation movement indicated by the double arrow 55, is effected via a drive unit with an eccentric drive 10 and a lever system 48 which is connected to the mold.
  • the mold is guided over rollers 44 on sliding surfaces 43.
  • the mold 5 oscillates with a stroke that is smaller than the distance 50 between the pouring tube 4 and the inner boundary surface of the pouring opening 20.
  • an electromagnetic sealing device in the form of a coil 11 is arranged coaxially with this pouring opening 20 above the opening. This is connected to an AC power source, not shown, and generates electromagnetic forces that act approximately vertically on the bath level in the mold. This prevents steel from escaping through the opening 20.
  • a hot mold wall is generated in the direct inflow area of the metal into the mold 5, which also prevents the formation of the strand shell mentioned above.
  • the desired position of the pouring tube 4 within the mold 5 depends on various pouring conditions, such as the steel temperature, the strand cross-section, etc. E.g. poured a slab cross-section, the area 52 of the outlet openings is usually below the longitudinal axis of the mold 5 and therefore closer to the lower mold wall 24. It is essential that the pouring tube 4 with its outflow region 52 is arranged in such a way that a hot mold wall can form, which in turn prevents the formation of a strand shell between the two strands.
  • the pouring tube 4 has in its outflow area 52 a plurality of outlet openings through which the liquid steel is introduced into the mold 5.
  • the steel is directed through the outlet opening 56 directly in the direction of the lower mold wall 24 and further pouring openings 59, 61 can be directed against lateral mold walls or in the direction of the longitudinal axis of the mold 5 be.
  • the position of the pouring tube in relation to the mold or its outlet openings must be selected so that the hot mold wall can form.
  • a pressure chamber can be provided between the tundish 3 and the mold 5 in order to generate downward forces on the bath level in the mold, which counteract the ferrostatic pressure.
  • the strength of the electromagnetic field or the gas pressure can be regulated automatically according to the bath level of the steel in the Tundish 3.
  • the tundish 3 can be arranged closer to the mold 5 than other more complex constructions. This enables the steel to be introduced into the mold with less heat loss. Another advantage is the lower ferrostatic pressure, which makes electromagnetic sealing easier.
  • FIGS. 6 and 7 show a further embodiment of the system according to FIG. 1.
  • closing devices 70 in the form of press punches 72 are provided which, e.g. arranged between the strand guide rollers 12 and the pull-out rollers 9 act on the strand in such a way that at least two opposite strand shells are brought into contact with one another under pressure, so that they weld together and a further outflow of liquid steel is prevented.
  • FIGS. 8 and 8a Another embodiment of a closing device 80 is shown in FIGS. 8 and 8a.
  • Two interacting scissor blades 82 are two against overlying strand shells brought into contact with each other, whereby these strand shells weld together. The strand can then be separated by the same scissors 82. This also prevents liquid steel from escaping from the strands that have not yet solidified.
  • FIG. 9 A further embodiment of a closing device is shown in FIG. 9, wherein the oscillation device 34 can be raised upwards in the event of a breakthrough, as indicated by the double arrow 90. This also raises the parts of the strand guide with the rollers 12 adjacent to the mold and the secondary cooling zone with the spray nozzles 40. The associated lifting of the strands 30, 32 presses the lower strand shell 92 onto the upper strand shell 94. As a result, the two strand shells weld together and prevent the still liquid steel from escaping from the strands. The lifting can take place for example by means of a lifting cylinder 95.
  • FIG. 10 Another possibility of preventing an undesired outflow of metal in the event of a breakthrough on at least one of the strands is shown in FIG. 10.
  • pressure is exerted by means of rollers 102 which act with respect to one another and which presses the opposite strand shells together and allows them to be welded.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP83109549A 1982-09-27 1983-09-26 Verfahren zum horizontalen Stranggiessen von Metallen, insbesondere von Stahl Withdrawn EP0107068A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US425120 1982-09-27
US06/425,120 US4540037A (en) 1982-09-27 1982-09-27 Method and apparatus for bidirectional horizontal continuous casing

Publications (1)

Publication Number Publication Date
EP0107068A1 true EP0107068A1 (de) 1984-05-02

Family

ID=23685246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83109549A Withdrawn EP0107068A1 (de) 1982-09-27 1983-09-26 Verfahren zum horizontalen Stranggiessen von Metallen, insbesondere von Stahl

Country Status (4)

Country Link
US (1) US4540037A (enrdf_load_stackoverflow)
EP (1) EP0107068A1 (enrdf_load_stackoverflow)
JP (1) JPS59130652A (enrdf_load_stackoverflow)
CA (1) CA1201867A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3615856A1 (de) * 1985-05-28 1986-12-04 Hitachi Zosen Corp., Osaka Horizontale stranggiesseinrichtung
EP0248242A3 (en) * 1986-06-05 1988-08-17 Westinghouse Electric Corporation Continuous metal casting apparatus

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4919192A (en) * 1987-05-15 1990-04-24 Westinghouse Electric Corp. Discrete excitation coil producing seal at continuous casting machine pouring tube outlet nozzle/mold inlet interface
EP0290866A3 (en) * 1987-05-15 1989-07-19 Westinghouse Electric Corporation Improved discrete excitation coil producing seal at continuous casting machine pouring tube outlet nozzle/mold inlet interface
DE3925939A1 (de) * 1989-08-03 1991-02-07 Mannesmann Ag Stranggiessanlage mit einer kokillenoszillationsvorrichtung
EP0535368B1 (de) * 1991-09-19 1996-06-05 Sms Schloemann-Siemag Aktiengesellschaft Verfahren und Anlage zur Herstellung von Stahlband
CN1042001C (zh) * 1992-11-11 1999-02-10 山东烟台造锁总厂 一种多头水平连续铸造装置
WO2001053389A1 (en) * 2000-01-19 2001-07-26 Illinois Tool Works, Inc. Thermoplastic adhesive
DE10058414A1 (de) * 2000-11-24 2002-05-29 Sms Demag Ag Stranggießkokille und Verfahren zum Erzeugen dünner Metallbänder
US20050214079A1 (en) * 2004-02-17 2005-09-29 Lovie Peter M Use of hydrate slurry for transport of associated gas
KR100591619B1 (ko) 2004-11-04 2006-06-20 한국기계연구원 마그네슘합금 판재 제조를 위한 수평연속 주조장치 및이를 이용한 제조방법
US7456233B2 (en) * 2005-02-16 2008-11-25 Nordson Corporation Adhesive composition
US10099236B1 (en) * 2018-01-02 2018-10-16 Alex Xie Apparatus and method for spraying color into cracks of a moving formed quartz slab to create veins in an engineered stone
US10376912B2 (en) 2018-01-02 2019-08-13 Alex Xie Apparatus and method for depositing color into cracks of a moving formed quartz slab to create veins in an engineered stone
US10300630B1 (en) 2018-12-20 2019-05-28 Alex Xie Cutting equipment and its controllers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472309A (en) * 1968-08-16 1969-10-14 Calderon Wellman Ltd Method of and apparatus for continuously casting steel
FR2076003A1 (enrdf_load_stackoverflow) * 1970-01-09 1971-10-15 Voest Ag
SU407630A1 (ru) * 1971-09-03 1973-12-10 Д. П. Евтеев, Г. А. Хасин , М. Я. Бровман Способ горизонтальной непрерывной и полунепрерывной разливки металлов
US4020890A (en) * 1974-11-01 1977-05-03 Erik Allan Olsson Method of and apparatus for excluding molten metal from escaping from or penetrating into openings or cavities
SU578155A1 (ru) * 1976-06-09 1977-10-30 Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения Машина дл непрерывного лить металла

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2252154B1 (enrdf_load_stackoverflow) * 1973-11-28 1976-12-03 Siderurgie Fse Inst Rech
CH604974A5 (enrdf_load_stackoverflow) * 1976-12-17 1978-09-15 Concast Ag
SU1311845A1 (ru) * 1982-02-09 1987-05-23 Всесоюзный научно-исследовательский и проектно-конструкторский институт металлургического машиностроения Машина непрерывного лить слитков горизонтального типа

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3472309A (en) * 1968-08-16 1969-10-14 Calderon Wellman Ltd Method of and apparatus for continuously casting steel
FR2076003A1 (enrdf_load_stackoverflow) * 1970-01-09 1971-10-15 Voest Ag
SU407630A1 (ru) * 1971-09-03 1973-12-10 Д. П. Евтеев, Г. А. Хасин , М. Я. Бровман Способ горизонтальной непрерывной и полунепрерывной разливки металлов
US4020890A (en) * 1974-11-01 1977-05-03 Erik Allan Olsson Method of and apparatus for excluding molten metal from escaping from or penetrating into openings or cavities
SU578155A1 (ru) * 1976-06-09 1977-10-30 Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения Машина дл непрерывного лить металла

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3615856A1 (de) * 1985-05-28 1986-12-04 Hitachi Zosen Corp., Osaka Horizontale stranggiesseinrichtung
EP0248242A3 (en) * 1986-06-05 1988-08-17 Westinghouse Electric Corporation Continuous metal casting apparatus

Also Published As

Publication number Publication date
CA1201867A (en) 1986-03-18
US4540037A (en) 1985-09-10
JPS59130652A (ja) 1984-07-27
JPH0470105B2 (enrdf_load_stackoverflow) 1992-11-10

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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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Inventor name: LANGNER, CARL