EP0451929B1 - Verfahren zur Bestimmung und Regulierung des Badspiegels einer Metallschmelze - Google Patents

Verfahren zur Bestimmung und Regulierung des Badspiegels einer Metallschmelze Download PDF

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Publication number
EP0451929B1
EP0451929B1 EP91250076A EP91250076A EP0451929B1 EP 0451929 B1 EP0451929 B1 EP 0451929B1 EP 91250076 A EP91250076 A EP 91250076A EP 91250076 A EP91250076 A EP 91250076A EP 0451929 B1 EP0451929 B1 EP 0451929B1
Authority
EP
European Patent Office
Prior art keywords
inert gas
regulating
bath
vessel
absolute pressure
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.)
Revoked
Application number
EP91250076A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0451929A2 (de
EP0451929A3 (en
Inventor
Ewald Dipl.-Ing. Feuerstacke
Gerhard Stadtfeld
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of EP0451929A2 publication Critical patent/EP0451929A2/de
Publication of EP0451929A3 publication Critical patent/EP0451929A3/de
Application granted granted Critical
Publication of EP0451929B1 publication Critical patent/EP0451929B1/de
Anticipated expiration legal-status Critical
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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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • B22D11/201—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level

Definitions

  • the invention relates to a method for determining and regulating the bath level of a molten metal in a metallurgical vessel, in particular a continuous mold of a casting plant.
  • the invention is therefore based on the object of creating a method of the generic type in which the bath level can be determined and regulated in a simple and reproducible manner.
  • the object is achieved in a method of the generic type in that inert gas is introduced into the molten metal at a certain freely selectable location within the vessel, that the absolute pressure of the inert gas introduced is measured, and that the absolute pressure measured during a non-zero flow is registered and from the difference between the absolute pressure and the pressure acting on the surface of the bath, the actual value of the distance of the bath surface from the location of the inert gas introduction is determined, that from this determined distance the difference to a predetermined target value is formed and as an electrical control signal of an actuator for regulating the bath level and / or the amount flowing out or withdrawn from the vessel is supplied.
  • This method according to the invention is advantageously simple to carry out. This is clear from the further embodiment of the invention, in which the inert gas is introduced at the end of a feed pipe for the melt which is immersed in the metal bath, or in that the inert gas is introduced at the bottom of the metal bath.
  • FIG. 1 shows the method according to the invention in use when filling a continuous mold of a casting plant.
  • the inert gas is removed from a pressure vessel and fed to a flow control device 2 via an adjustable throttle 1.
  • the inert gas passing through the flow control device 2 passes via a pipeline 3 to a pipe 4 which projects into the melt.
  • a pipe 4 which projects into the melt.
  • Such a tube can be realized, for example, by an additional hole in a dip spout, the hole opening into the melt at the immersing end.
  • the pipeline 3 is in direct connection with a pressure measuring device. In the event that inert gas flows into the melt with the formation of gas bubbles, a non-zero flow is registered by the flow control device 2.
  • the pressure registered at the pressure measuring device 5 is a measure of the distance of the bath level from the introduction of inert gas.
  • the pressure measuring device 5 converts the registered pressure into an electrical signal and feeds this determined actual value to a comparator 6.
  • An actuating signal is formed from the difference between a predetermined target value and the determined actual value, which is fed to an actuator 7.
  • This actuator 7 actuates, for example, the plug 8 of a distributor 9. It is also possible to influence the withdrawal speed of the strand from the mold with the control signal.
  • FIG. 2 shows the possibility of using the method for determining and regulating the bath level in a distributor 10, in which the amount of metal flowing out is controlled as a function of the fill level.
  • the inert gas is introduced near the spout 11 or at the bottom of the distributor 10 at point 13.
  • This introduction of inert gas is provided externally, as shown in FIG. 1, with the control and measuring devices described there.
  • the control signal can act on the tilt angle setting of the distributor or on the pressure acting on the bath surface.
  • FIG. 3 shows the application of the method in spray compacting.
  • the inert gas is introduced through the pouring stone 12 of the vessel.
  • the ferrostatic pressure is the decisive pressure that determines the amount of melt escaping from the spout.
  • the external supply of inert gas and the measuring and control devices are also constructed as shown in FIG. 1.
  • the control signal acts on the withdrawal speed of the emerging metal. * * Since the vessel containing the molten metal is not refilled during the leakage, it is important that the inert gas introduction with the corresponding measurement of the absolute pressure and the flow rate is carried out virtually continuously during the leakage. It is necessary here that the flow rate just exceeds the value zero at any point in time at which the absolute pressure for bath level height determination is registered and evaluated.
  • this method for determining and regulating the bath level is simple in terms of apparatus and thus finds a wide range of applications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Chemically Coating (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP91250076A 1990-04-11 1991-03-15 Verfahren zur Bestimmung und Regulierung des Badspiegels einer Metallschmelze Revoked EP0451929B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4012039 1990-04-11
DE4012039A DE4012039A1 (de) 1990-04-11 1990-04-11 Verfahren zur bestimmung und regulierung des badspiegels einer metallschmelze

Publications (3)

Publication Number Publication Date
EP0451929A2 EP0451929A2 (de) 1991-10-16
EP0451929A3 EP0451929A3 (en) 1993-03-17
EP0451929B1 true EP0451929B1 (de) 1997-05-02

Family

ID=6404388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91250076A Revoked EP0451929B1 (de) 1990-04-11 1991-03-15 Verfahren zur Bestimmung und Regulierung des Badspiegels einer Metallschmelze

Country Status (8)

Country Link
US (1) US5170839A (ja)
EP (1) EP0451929B1 (ja)
JP (1) JP2977318B2 (ja)
AT (1) ATE152380T1 (ja)
AU (1) AU639307B2 (ja)
CA (1) CA2040238C (ja)
DE (2) DE4012039A1 (ja)
ES (1) ES2100926T3 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677284B1 (fr) * 1991-06-07 1993-08-27 Pechiney Aluminium Procede et appareillage pour la coulee automatique de demi-produits.
DE4344953C2 (de) * 1993-12-27 1996-10-02 Mannesmann Ag Verfahren und Vorrichtung zum Angießen eines endabmessungsnahen Metallbandes
US20050200056A1 (en) * 2004-03-12 2005-09-15 Heraeus Electro-Nite International N.V. Apparatus and method for determining fluid depth
CN101862819B (zh) * 2010-06-18 2011-05-11 新星化工冶金材料(深圳)有限公司 自动调节液面高度的控制机构及其镁合金板连续铸轧系统

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE129433C (ja) *
US2889596A (en) * 1957-02-26 1959-06-09 British Iron Steel Research Casting of metals
GR65264B (en) * 1978-02-18 1980-07-31 British Aluminium Co Ltd Metal casting
JPS55149761A (en) * 1979-05-10 1980-11-21 Mishima Kosan Co Ltd Continuous casting control device
DE2931199A1 (de) * 1979-08-01 1981-02-19 Endress Hauser Gmbh Co Anordnung zur messung des badspiegels in einer giessanlage, insbesondere in der kokille einer stranggiessanlage
JPS5740699A (en) * 1980-08-26 1982-03-06 Doryokuro Kakunenryo Method of grasping radioactive waste furnace state
DE3317474A1 (de) * 1983-05-13 1984-11-15 Russ-Elektroofen Produktions-Gesellschaft mbH & Co KG, 5000 Köln Niederdruckgiessverfahren und vorrichtung zu seiner durchfuehrung
DE3346650A1 (de) * 1983-12-20 1985-06-27 Schweizerische Aluminium Ag, Chippis Verfahren und vorrichtung zum bestimmen und regeln eines niveaus einer metallschmelze
JPS60180654A (ja) * 1984-02-29 1985-09-14 Nippon Steel Corp 連続鋳造用モ−ルド内の浴面形状制御方法及び装置
SU1282954A1 (ru) * 1984-07-27 1987-01-15 Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения Способ подачи жидкого металла в кристаллизатор машин непрерывного лить металлов
JPS6221447A (ja) * 1985-07-17 1987-01-29 Nippon Steel Corp 連続鋳造浸漬ノズル気体吹込制御法
JPS62252649A (ja) * 1986-04-25 1987-11-04 Nippon Steel Corp 溶鋼連続鋳造鋳型内の偏流制御方法
JP2605573B2 (ja) * 1993-01-27 1997-04-30 株式会社栗本鐵工所 固形物を含む流体管路の切替弁

Also Published As

Publication number Publication date
DE4012039A1 (de) 1991-10-17
ES2100926T3 (es) 1997-07-01
AU639307B2 (en) 1993-07-22
EP0451929A2 (de) 1991-10-16
AU7272591A (en) 1991-10-17
CA2040238C (en) 1998-06-09
US5170839A (en) 1992-12-15
ATE152380T1 (de) 1997-05-15
CA2040238A1 (en) 1991-10-12
JP2977318B2 (ja) 1999-11-15
JPH04228249A (ja) 1992-08-18
DE59108687D1 (de) 1997-06-05
EP0451929A3 (en) 1993-03-17

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