WO2000029147A1 - Procede et dispositif de regulation de jet de coulee - Google Patents

Procede et dispositif de regulation de jet de coulee Download PDF

Info

Publication number
WO2000029147A1
WO2000029147A1 PCT/EP1999/008285 EP9908285W WO0029147A1 WO 2000029147 A1 WO2000029147 A1 WO 2000029147A1 EP 9908285 W EP9908285 W EP 9908285W WO 0029147 A1 WO0029147 A1 WO 0029147A1
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
gas
pouring jet
pouring
constriction
Prior art date
Application number
PCT/EP1999/008285
Other languages
German (de)
English (en)
Inventor
Paul Grohmann
Original Assignee
Messer Austria Gmbh
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 Messer Austria Gmbh filed Critical Messer Austria Gmbh
Priority to AT99955923T priority Critical patent/ATE233624T1/de
Priority to EP99955923A priority patent/EP1128920B1/fr
Priority to DE59904485T priority patent/DE59904485D1/de
Publication of WO2000029147A1 publication Critical patent/WO2000029147A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D37/00—Controlling or regulating the pouring of molten metal from a casting melt-holding vessel
    • B22D37/005—Shielding the molten metal stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures

Definitions

  • the invention relates to a method and a device for regulating pouring jets in steel production.
  • the methods and devices known in steel production for regulating the metallic pouring stream flowing from a ladle or other storage container into the processing installation, such as, for example, in the tundish of a continuous casting installation, are carried out using mechanical means, such as, for example, slides or plugs, through which the mass flow of the pouring jet * regulated until it is completely closed off.
  • the object of the invention is therefore to provide an economical method and a simple device for optimally regulating the flow rate of pouring streams in steel production.
  • This object is achieved with the method according to the invention in that the mass flow of the pouring jet is regulated by a gas.
  • the gas for example an inert gas such as argon, a protective gas such as nitrogen or a gas in the form of an evaporated liquid
  • a gas connection in the double wall of the concentric gas heater and then into the double wall of the concentric chamber connected to the gas heater.
  • the gas enters the interior of the chamber through the inflow openings of the double wall, in which it is evenly distributed through a chamber forming and flows an annular gap to the pouring stream, concentric constriction and then discharged to the outside through a lower outflow opening of the gas heater.
  • the amount of gas used is advantageously selected so that a pressure arises in the chamber which counteracts the pouring jet flowing out of the outflow opening of the container and thus has a regulating effect on its outflow amount.
  • the relevant gas back pressure is essentially determined by the amount of gas used per unit of time, the size of the annular gap area and the geometry of the constriction forming the chamber floor.
  • the pouring jet outflow quantity from the outflow opening of the container is known to depend on the geometry of the outflow opening of the container and the static pressure of the material contained therein.
  • the static liquid pressure corresponds to the height of the liquid level above the outlet opening in the container, that is to say generally the bath height.
  • the gas volume flow can thus be regulated via the gas input quantity.
  • the gas back pressure acting on the pouring jet flowing out of the container in the region of the outflow opening counteracts the static pouring jet liquid pressure.
  • the amount of liquid flowing out of the outflow opening of the container can thus be regulated simply and effectively by the amount of gas used in a range of a full pouring stream quantity flow in the absence of gas counterpressure until the pouring jet flows back into the container at a gas backpressure exceeding the static liquid pressure.
  • the gas heater is only to be understood as an option to improve the economics of the process, which can be dispensed with in unfavorable conditions, such as unfavorable installation conditions.
  • the gas flowing directly into the double wall of the concentric chamber in this case is then also heated by the waste heat of the pouring jet flowing out of the outlet opening of the container until it flows into the interior of the chamber.
  • the device characterized in that the container having the outflow opening is connected to the concentric chamber having the concentric constriction is used with particular advantage.
  • the double-walled concentric chamber is connected to the concentric, double-walled gas heater in such a way that the gas flowing through the double wall of the gas heater and then through the double wall of the chamber via inflow openings in the chamber wall into the chamber interior in the double wall of the gas heater and the chamber is preheated by the waste heat of the pouring jet with the advantages already shown.
  • the coolable and heatable made of ceramic or metal and gas-tightly connected to the container and enclosing the pouring jet only in a partial area, ensures a uniform gas introduction and has as the chamber bottom the concentric constriction forming the annular gap with the pouring jet.
  • the narrowing of the chamber is designed in such a way that the highest possible flow resistance in the gas and thus a high gas back pressure in the region of the outflow opening of the container is ensured.
  • a design of the constriction as a pointed edge has proven to be advantageous.
  • the device according to the invention can also be used without a gas heat exchanger designed according to the available length of the pouring jet.
  • the practical advantageous applicability of the invention was demonstrated by an experiment in which the sharp-edged chamber constriction forming an annular gap with a diameter of 20 mm was subjected to a gaseous nitrogen quantity of 150 m3 / h. A liquid with a diameter of 10 mm, hydraulically similar to the liquid steel, was used as the pouring stream. Due to the selected parameters, a gas back pressure of up to 0.5 bar was achieved in the area below the outflow opening of the container, which corresponds to a change in the bath level height of 0.7 m.
  • pouring systems can be adapted in their casting performance to the respective requirements of the downstream system, for example a continuous casting system.
  • the subject matter of the invention is not only limited to the regulation of metallic liquids in steel production. It can also be used to regulate the mass flow of liquid jets of different types, for example also particularly advantageously for regulating the mass flow of aggressive liquids.
  • the pouring jet 3 enclosing, concentric and Double-walled chamber 4 has a concentric constriction 6, which forms the chamber bottom and is formed as a pointed edge, which in turn forms an annular gap 7 with the pouring jet 3, and is provided with inflow openings 8 opening into the interior of the chamber 4.
  • the concentric gas heater 5 connected to the chamber 4 is in one of its
  • Double wall opening located at the lower end of the gas connection 9 and provided with a bottom-side outflow opening 10.
  • the gas flowing through the entry opening 9 into the double wall of the gas heater 5 and heated by the waste heat of the pouring jet 3 as it flows through it continues to flow through the double wall of the chamber 4 with further heating through the waste heat of the pouring jet 3 and then through the inflow openings opening into the chamber interior 8 evenly distributed into the interior of the chamber 4 surrounding the pouring jet 3 flowing out of the outlet opening 2 of the container 1.
  • the preheated gas flowing into the interior of the chamber 4 is further heated by the waste heat of the pouring jet 3 flowing into the chamber 4 from the outlet opening 2 and then flows through the annular gap 7 formed in the area of the constriction 6 into the gas heater 5 and is discharged to the outside through the tube forming the inner wall of the gas heater 5 with the outlet opening 10 on the underside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Discharge Heating (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Abstract

Procédé et dispositif de régulation de jet de coulée pour la fabrication de l'acier. Selon ledit procédé, le débit d'un jet de coulée (3) s'écoulant par l'orifice d'écoulement (2) d'une cuve (1) est régulé de façon mécanique. Selon la présente invention, le débit du jet de coulée (3) est régulé par un gaz, dans une chambre (4) reliée à la cuve (1) et comportant un étranglement (6), si bien que l'on obtient une régulation simple et exacte du jet de coulée, sans usure du moyen de régulation.
PCT/EP1999/008285 1998-11-13 1999-10-30 Procede et dispositif de regulation de jet de coulee WO2000029147A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT99955923T ATE233624T1 (de) 1998-11-13 1999-10-30 Verfahren und einrichtung zur regulierung von giessstrahlen
EP99955923A EP1128920B1 (fr) 1998-11-13 1999-10-30 Procede et dispositif de regulation de jet de coulee
DE59904485T DE59904485D1 (de) 1998-11-13 1999-10-30 Verfahren und einrichtung zur regulierung von giessstrahlen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19852289.4 1998-11-13
DE19852289A DE19852289A1 (de) 1998-11-13 1998-11-13 Verfahren und Einrichtung zur Regulierung von Gießstrahlen

Publications (1)

Publication Number Publication Date
WO2000029147A1 true WO2000029147A1 (fr) 2000-05-25

Family

ID=7887630

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/008285 WO2000029147A1 (fr) 1998-11-13 1999-10-30 Procede et dispositif de regulation de jet de coulee

Country Status (6)

Country Link
EP (1) EP1128920B1 (fr)
AT (1) ATE233624T1 (fr)
DE (2) DE19852289A1 (fr)
ES (1) ES2194524T3 (fr)
PT (1) PT1128920E (fr)
WO (1) WO2000029147A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2094454A (en) * 1981-03-03 1982-09-15 Flogates Ltd Improvements in the pouring of molten metals
JPS5861954A (ja) * 1981-10-09 1983-04-13 Mitsubishi Heavy Ind Ltd 密閉型連続鋳造設備
EP0171589B1 (fr) * 1984-07-18 1988-05-04 RADEX ITALIANA S.p.A. Busette collectrice dans un dispositif pour contrôler l'écoulement de l'acier liquide sortant d'une poche de coulée ou d'un panier intermédiaire
EP0396111B1 (fr) * 1989-05-03 1995-01-11 British Steel plc Réglage pour le courant de fonte

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4424955A (en) * 1981-10-05 1984-01-10 Korf Technologies, Inc. Apparatus for treating liquid metal in a vessel
DE3444512A1 (de) * 1984-12-06 1986-06-12 Klöckner-Werke AG, 4100 Duisburg Verfahren und vorrichtung zum einblasen mindestens eines gases bzw. mindestens eines in einem gas suspendierten feststoffes in eine in einem metallurgischen gefaess befindliche metallische schmelze, insbesondere in eine unter vakuum stehende stahlschmelze
DE3917403C2 (de) * 1989-05-29 1998-02-05 Zimmermann & Jansen Gmbh Verfahren und Vorrichtung zum Füllen einer Stranggießkokille mit metallischer Schmelze

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2094454A (en) * 1981-03-03 1982-09-15 Flogates Ltd Improvements in the pouring of molten metals
JPS5861954A (ja) * 1981-10-09 1983-04-13 Mitsubishi Heavy Ind Ltd 密閉型連続鋳造設備
EP0171589B1 (fr) * 1984-07-18 1988-05-04 RADEX ITALIANA S.p.A. Busette collectrice dans un dispositif pour contrôler l'écoulement de l'acier liquide sortant d'une poche de coulée ou d'un panier intermédiaire
EP0396111B1 (fr) * 1989-05-03 1995-01-11 British Steel plc Réglage pour le courant de fonte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 153 (M - 226) 5 July 1983 (1983-07-05) *

Also Published As

Publication number Publication date
ES2194524T3 (es) 2003-11-16
DE59904485D1 (de) 2003-04-10
ATE233624T1 (de) 2003-03-15
DE19852289A1 (de) 2000-05-25
EP1128920A1 (fr) 2001-09-05
PT1128920E (pt) 2003-07-31
EP1128920B1 (fr) 2003-03-05

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