EP0249573A2 - Procédé et dispositif pour laisser couler d'une poche de coulée un métal liquide exempt de scories - Google Patents

Procédé et dispositif pour laisser couler d'une poche de coulée un métal liquide exempt de scories Download PDF

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Publication number
EP0249573A2
EP0249573A2 EP87730019A EP87730019A EP0249573A2 EP 0249573 A2 EP0249573 A2 EP 0249573A2 EP 87730019 A EP87730019 A EP 87730019A EP 87730019 A EP87730019 A EP 87730019A EP 0249573 A2 EP0249573 A2 EP 0249573A2
Authority
EP
European Patent Office
Prior art keywords
slag
pouring
average value
weighing device
signals
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Withdrawn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
EP87730019A
Other languages
German (de)
English (en)
Other versions
EP0249573A3 (fr
Inventor
Manfred Kornet
Hans Uwe Franzen
Josef Glaser
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
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0249573A2 publication Critical patent/EP0249573A2/fr
Publication of EP0249573A3 publication Critical patent/EP0249573A3/fr
Withdrawn legal-status Critical Current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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B22D11/183—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring molten metal weight
    • 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
    • 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
    • B22D41/08—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like for bottom pouring

Definitions

  • the invention relates to a method and a device for slag-free emptying of a molten metal covered with a layer of slag from a ladle with a bottom spout.
  • the object of the invention is to further improve the last-mentioned method and to make its meaningfulness more reliable.
  • Fig. L is the ladle l in pan arms 3, z. B. a casting car, a ladle turret or a crane.
  • the ladle l rests there on a weighing device, in the form of pressure or load cells l0.
  • the ladle 1 has a bottom pouring opening, which is closed with a slide 2.
  • the position of the slide 2 can be changed by means of the actuator 4 via a control part 5, so that a certain amount of steel per unit time can be drained from the ladle in a controlled manner.
  • the weight of the ladle 1 is continuously detected by the weighing device 10 and the change in weight over the time unit in the measured value converter 6 continuously determines the casting output (t / min) and outputs it as a signal. These signals are fed to an evaluation device 7, which recognizes from the change in the casting performance whether slag is running. These "recognized" signals are subjected to a plausibility check in a computer 8. Interference from the system, such as B. change of the slide position, movement of the crane girder, etc., are recognized and eliminated in the plausibility check 8. Important measured values are registered on the recorder 9.
  • FIG. 2 shows schematically the evaluation process of the measured values in blocks 7 and 8 according to FIG. 1. Then the casting performance is read into the A / D converter and read into six memories one after the other at certain time intervals. When all values have been read in, the sum of the first three and the following three measured values is formed. The sum 2 is subtracted from the sum l. It is also checked whether the curve shape formed by the mean values of the Casting performance curve corresponds to a curve for slag tracking. The difference between the two buzzer values must be greater than a tolerance field and also positive. In addition, it is checked whether the slider of the ladle moved during the evaluation phase or whether vibrations caused by a crane movement influenced the measured values. The measurements falling into a fault phase are eliminated.
  • the computer 8 taking into account the aforementioned conditions, outputs a measured value that lies outside the setpoint curve including its tolerance range, the signal is fed to the control part 5 of the actuator 4 of the pouring closure 2 of the ladle 1 in order to interrupt the metal flow from the pan.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Details (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Continuous Casting (AREA)
EP87730019A 1986-06-10 1987-02-23 Procédé et dispositif pour laisser couler d'une poche de coulée un métal liquide exempt de scories Withdrawn EP0249573A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3619416 1986-06-10
DE19863619416 DE3619416A1 (de) 1986-06-10 1986-06-10 Verfahren und einrichtung zum schlackenfreien entleeren einer giesspfanne

Publications (2)

Publication Number Publication Date
EP0249573A2 true EP0249573A2 (fr) 1987-12-16
EP0249573A3 EP0249573A3 (fr) 1989-07-05

Family

ID=6302650

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87730019A Withdrawn EP0249573A3 (fr) 1986-06-10 1987-02-23 Procédé et dispositif pour laisser couler d'une poche de coulée un métal liquide exempt de scories

Country Status (3)

Country Link
US (1) US4787604A (fr)
EP (1) EP0249573A3 (fr)
DE (1) DE3619416A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996003238A1 (fr) * 1994-07-25 1996-02-08 Ajf, Inc. Appareil de retenue du laitier dans des recipients de metal fondu
US5645792A (en) * 1996-01-16 1997-07-08 Ajf, Inc. Slag control shape release apparatus for molten metal vessels
US11154926B2 (en) * 2016-10-26 2021-10-26 Baoshan Iron & Steel Co., Ltd. Control method and apparatus for inhibiting slag entrapment in ladle in last stage of pouring during continuous casting

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0574423B1 (fr) * 1991-03-04 1999-09-22 Motorola, Inc. Recepteur d'appel selectif ayant en memoire des messages definis par l'utilisateur et procedes de presentation desdits messages

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1473044A (fr) * 1965-12-14 1967-03-17 Siderurgie Fse Inst Rech Procédé et dispositif pour l'obtention d'un débit de métal liquide constant
US3917111A (en) * 1971-03-02 1975-11-04 Siderurgie Fse Inst Rech Apparatus and method for regulating molten metal supply
US3814914A (en) * 1973-06-05 1974-06-04 Bethlehem Steel Corp Automatic dry coke weight system
GB1483732A (en) * 1973-10-31 1977-08-24 Flogates Ltd Metal casting
US4135915A (en) * 1973-12-12 1979-01-23 Gec Mechanical Handling Limited Kinetic energy monitor
DE2814699C2 (de) * 1978-04-03 1980-09-11 Mannesmann Ag, 4000 Duesseldorf Verfahren zur Erkennung des Gießendes beim Vergießen von Metallen
JPS5758971A (en) * 1980-09-24 1982-04-09 Kawasaki Steel Corp Method for preventing outflow of slag
JPS58221643A (ja) * 1982-06-17 1983-12-23 Nippon Steel Corp タンデイツシユ内のスラグ流出防止方法
DE3430558C2 (de) * 1984-08-20 1986-10-16 Mannesmann AG, 4000 Düsseldorf Verfahren und Einrichtung zum Kontrollieren von Schlacke in einem Vorratsbehälter beim Stranggießen von Metall, insbesondere von Stahl

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996003238A1 (fr) * 1994-07-25 1996-02-08 Ajf, Inc. Appareil de retenue du laitier dans des recipients de metal fondu
US5645792A (en) * 1996-01-16 1997-07-08 Ajf, Inc. Slag control shape release apparatus for molten metal vessels
US11154926B2 (en) * 2016-10-26 2021-10-26 Baoshan Iron & Steel Co., Ltd. Control method and apparatus for inhibiting slag entrapment in ladle in last stage of pouring during continuous casting

Also Published As

Publication number Publication date
US4787604A (en) 1988-11-29
DE3619416A1 (de) 1987-12-17
EP0249573A3 (fr) 1989-07-05

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Inventor name: GLASER, JOSEF