EP0207092B1 - Vorrichtung zur zufuhr von flüssigem stahl zu einer stranggiessmaschine - Google Patents

Vorrichtung zur zufuhr von flüssigem stahl zu einer stranggiessmaschine Download PDF

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Publication number
EP0207092B1
EP0207092B1 EP19850905836 EP85905836A EP0207092B1 EP 0207092 B1 EP0207092 B1 EP 0207092B1 EP 19850905836 EP19850905836 EP 19850905836 EP 85905836 A EP85905836 A EP 85905836A EP 0207092 B1 EP0207092 B1 EP 0207092B1
Authority
EP
European Patent Office
Prior art keywords
tundish
bath
electrodes
steel
minutes
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.)
Expired
Application number
EP19850905836
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English (en)
French (fr)
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EP0207092A1 (de
Inventor
Jean Pronkiewiez
Jean Davene
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.)
Clecim SAS
Original Assignee
Clecim SAS
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 Clecim SAS filed Critical Clecim SAS
Publication of EP0207092A1 publication Critical patent/EP0207092A1/de
Application granted granted Critical
Publication of EP0207092B1 publication Critical patent/EP0207092B1/de
Expired 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
    • B22D11/10—Supplying or treating molten metal

Definitions

  • the present invention relates to an improvement in the supply of liquid steel to the ingot mold or ingot molds of a continuous casting machine.
  • the liquid steel is brought to the site in a pocket, coming from the converter or the electric furnace.
  • the pocket has an opening at its lower part, closed by a pouring nozzle.
  • the steel flows from the pocket to an intermediate tank, called a distributor, a distributor, the bottom of which is also provided with one or more orifices.
  • a distributor a distributor, the bottom of which is also provided with one or more orifices.
  • Each of these orifices is placed above an ingot mold, so that the liquid steel can flow from the distributor into the ingot mold (s), depending on whether the machine is single-line or multi-line.
  • the casting time for a given bag is limited in time, for example to 60 to 70 minutes. Beyond this, it is considered that the drop in temperature of the steel is too great, so that pouring is no longer possible.
  • This constraint of limitation in casting time often requires, for casting all of the steel contained in a given pocket, to multiply the number of casting lines, which is very disadvantageous in cost and complexity of the installation. It therefore appears that it would be very advantageous to be able to extend the casting time, at least so that the steel does not cool sufficiently before being poured into the ingot mold (s) so that the casting must be interrupted. at a certain time.
  • a first solution to solve this problem would be to start casting with a very high temperature liquid steel in the ladle. Such a solution is not really conceivable because it is on the one hand bad for the quality of the cast products, and on the other hand, it greatly increases the risk of breakthroughs at the start of the casting line.
  • the dispenser tank is equipped with heating means simultaneously effecting stirring of the bath by circulation of a direct current over the entire depth thereof, said means comprising at least one pair of electrodes connected respectively. at the two terminals of at least one DC electrical power source, one of the two electrodes being placed in the bottom of the distributor tank and the other at the top of it
  • the direct current thus produced creates in the bath a heating and stirring effect which can be amplified by the shape of the distributor or its masonry,
  • the bag 1 is a bag of 120 tonnes of liquid steel
  • the dispenser 4 is a tank of 20 tonnes of liquid steel
  • the flow rate of cast steel per line is 270 kg / min.
  • two graphite electrodes respectively A and B, have been installed in the top of the distributor tank 4, at each of its ends as shown and above the level 6 of the liquid steel in the tank 4, and two other graphite electrodes, respectively A 'and B', in the bottom 4, at each of its ends.
  • the electrodes A, A 'and B, B' are positioned as indicated so that the lines (d, d ') which join them respectively are the as long as possible from one end of the tank to the other. In this way, the circulation of direct current can distribute its effects over most of the bath and in particular over its entire depth.
  • the electrodes A and A ' are respectively connected to the negative and positive poles of a first source of direct current V, which can provide a power of up to 1.2 MVA to fix ideas, by delivering a current of up to 8000 Amperes under direct voltage up to 150 Volts.
  • the electrodes B and B ' are connected respectively to the negative and positive poles of a second direct current source V', completely independent of the first source V, and with the same characteristics of power, voltage and current, as the latter .
  • FIGS. 3 and 4 schematically represent, and in the same way, an installation similar to that of FIGS. 1 and 2, but relating to a machine with a single casting line.
  • the reference figures relating to the same objects, but suitable for casting with a single line, have therefore been used in these figures.
  • the installation comprises only two graphite electrodes C and C 'and a single continuous power supply of power v.
  • the electrodes C and C ' are placed respectively at the top and at the bottom (on the side in this example) of the distributor tank 4 so that the current line e which joins them in the steel bath liquid is a straight line passing right through and from top to bottom over one of the greatest possible lengths.
  • the pocket 1 is a pocket initially containing 120 tonnes of liquid steel
  • the distributor tank 4 has a capacity of 11 tonnes of liquid steel
  • the flow rate is 1030 kg / min.
  • the installed power for the continuous source v is 1200 kVA, its possibility of current goes up to 10,000 amps and its possibility of voltage goes up to 150 volts.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Claims (4)

1. Einrichtung zum Zuführen von flüssigem Stahl bei einer kontinuierlich arbeitenden Gießmaschine mit einer Verteilervanne (4) über der bzw den Kokillen, von deren Boden sich der flüssige Stahl unmittelbar in die Kokille bzw die Kokillen ergießt und mit einer Einrichtung zum Erwärmen des Stahlbades in der Verteilerwanne (4) während des Gießens, dadurch gekennzeichnet, daß die Einrichtung zum Erwärmen zugleich ein Durchmischen des Bades über dessen ganze Tiefe durch Zirkulation eines Gleichstroms bewirkt und hierzu mindestens ein Paar von Elektroden (A A', B B', C C') aufweist, die mit zwei Polen (-, +) mindestens einer elektrischen Gleichstromquelle (V, V', v) verbunden ist, wobei eine der beiden Elektroden (A', B', C') am Boden der Verteilervanne (4) und die andere (A, B, C) oben in dieser angeordnet ist.
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die oben in der Verteilerwanne (4) angeordnete Elektrode (A, B, C) mit dem negativen Pol der angeschlossenen Stromquelle (V, V', v) und die am Boden der Verteilerwanne (4) angeordnete Elektrode (A', B', C') mit dem positiven Pol der Stromquelle verbunden ist.
3. Einrichtung nach Anspruch 2, dadurch gekennzeichnet, daß jedes zugeordnete Elektrodenpaar (AA', BB', CC') derart angeordnet ist, daß die sie verbindende Gerade (d, d', e) in dem Bad des flüssigen Stahls die größtmögliche Länge (4) von einem Ende zum anderen der Verteilerwanne aufweist.
4. Einrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Elektroden eines jeden Paars (A A', B B') am Boden und oben in dem Bad an einander gegenüberliegenden Enden der Verteilerwanne (4) derart angeordnet sind, daß sie einen sich im Inneren des Bades diagonal kreuzenden Stromfluß erzeugen.
EP19850905836 1984-11-23 1985-11-22 Vorrichtung zur zufuhr von flüssigem stahl zu einer stranggiessmaschine Expired EP0207092B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8417864A FR2573682B1 (fr) 1984-11-23 1984-11-23 Dispositif d'alimentation en acier liquide d'une machine de coulee continue
FR8417864 1984-11-23

Publications (2)

Publication Number Publication Date
EP0207092A1 EP0207092A1 (de) 1987-01-07
EP0207092B1 true EP0207092B1 (de) 1988-04-27

Family

ID=9309873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850905836 Expired EP0207092B1 (de) 1984-11-23 1985-11-22 Vorrichtung zur zufuhr von flüssigem stahl zu einer stranggiessmaschine

Country Status (5)

Country Link
EP (1) EP0207092B1 (de)
DE (1) DE3562321D1 (de)
ES (1) ES8702191A1 (de)
FR (1) FR2573682B1 (de)
WO (1) WO1986003146A1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1288760B (de) * 1966-06-14 1969-02-06 Coupette Verfahren zur Steuerung von Temperatur und Stahlanalyse beim Stranggiessen und Vorrichtung dazu
JPS58100951A (ja) * 1981-12-09 1983-06-15 Nippon Steel Corp 連続鋳造用溶鋼の温度調整方法
JPS58187247A (ja) * 1982-04-28 1983-11-01 Mitsubishi Heavy Ind Ltd 金属薄板の連続鋳造方法

Also Published As

Publication number Publication date
FR2573682B1 (fr) 1987-02-27
ES8702191A1 (es) 1986-12-16
FR2573682A1 (fr) 1986-05-30
EP0207092A1 (de) 1987-01-07
DE3562321D1 (en) 1988-06-01
WO1986003146A1 (fr) 1986-06-05
ES549191A0 (es) 1986-12-16

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