EP0130960A3 - Process for monitoring slag-foaming - Google Patents

Process for monitoring slag-foaming Download PDF

Info

Publication number
EP0130960A3
EP0130960A3 EP84870068A EP84870068A EP0130960A3 EP 0130960 A3 EP0130960 A3 EP 0130960A3 EP 84870068 A EP84870068 A EP 84870068A EP 84870068 A EP84870068 A EP 84870068A EP 0130960 A3 EP0130960 A3 EP 0130960A3
Authority
EP
European Patent Office
Prior art keywords
foaming
foam
sound
intensity
measurement
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Withdrawn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
EP84870068A
Other languages
German (de)
French (fr)
Other versions
EP0130960A2 (en
Inventor
Daniel Léon Ramelot
Jean-Paul François Fischbach
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.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
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
Priority claimed from BE6/47835A external-priority patent/BE896980A/en
Application filed by Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of EP0130960A2 publication Critical patent/EP0130960A2/en
Publication of EP0130960A3 publication Critical patent/EP0130960A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4673—Measuring and sampling devices
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/36—Processes yielding slags of special composition
    • C21C2005/366—Foam slags

Abstract

Pour surveiller le moussage de la scorie dans un con­ vertisseur à l'oxygène, on mesure l'intensité S₁ du son dans une première bande de fréquences (150-1000 Hz) et on déter­ mine à partir de cette première mesure le moment où la mousse atteint la lance de soufflage. On mesure en continu l'intensité S₂ du son dans une seconde bande de fréquences (5-40 Hz) et on détermine, à partir de cette seconde mesure, le moment où la mousse atteint un niveau proche du bec du convertisseur. On modifie alors les conditions de soufflage de façon à empêcher le débordement de la mousse. To monitor slag frothing in a con Oxygenizer, we measure the intensity S₁ of the sound in a first frequency band (150-1000 Hz) and one deter mine from this first measurement the time when the foam reaches the blowing lance. We measure continuously the intensity S₂ of the sound in a second frequency band (5-40 Hz) and we determine, from this second measurement, when the foam reaches a level close to the beak of the converter. We then modify the blowing conditions so as to prevent the foam from overflowing.

EP84870068A 1983-06-06 1984-05-30 Process for monitoring slag-foaming Withdrawn EP0130960A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE6/47835A BE896980A (en) 1983-06-06 1983-06-06 Slag foaming control during oxygen converter refining - using sound intensity measurements in two frequency bands
BE6047835 1983-06-06

Publications (2)

Publication Number Publication Date
EP0130960A2 EP0130960A2 (en) 1985-01-09
EP0130960A3 true EP0130960A3 (en) 1986-04-02

Family

ID=3874927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84870068A Withdrawn EP0130960A3 (en) 1983-06-06 1984-05-30 Process for monitoring slag-foaming

Country Status (1)

Country Link
EP (1) EP0130960A3 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT392801B (en) * 1989-06-05 1991-06-25 Voest Alpine Ind Anlagen METHOD FOR SLAG GUIDANCE IN A PALE STEEL CONVERTER
DE4425089C1 (en) * 1994-07-15 1996-01-11 Hamburger Stahlwerke Gmbh Process for controlling foam slag formation in a three-phase arc furnace
AT405526B (en) * 1995-03-30 1999-09-27 Voest Alpine Stahl Donawitz METHOD AND DEVICE FOR LIMITING THE VOLUME OF FOAM IN A METALLURGICAL VESSEL
DE10111394B4 (en) * 2001-03-09 2008-12-18 Sms Demag Ag Method and apparatus for controlling a metallurgical process with formation of slag on a molten bath surface
DE10152371B4 (en) * 2001-10-24 2004-04-15 Sms Demag Ag Method and device for determining the foam slag heights during the fresh process in a blow steel converter
CN113061684B (en) * 2021-03-11 2022-04-22 莱芜钢铁集团银山型钢有限公司 Converter dynamic bottom blowing method based on audio slagging

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB976158A (en) * 1961-09-13 1964-11-25 Centre Nat Rech Metall The control of steel manufacturing processes
FR1430843A (en) * 1965-04-29 1966-03-04 Centre Nat Rech Metall Installation for controlling the smelting refining operation
FR2292769A1 (en) * 1974-11-28 1976-06-25 Centre Rech Metallurgique CAST IRON REFINING CONTROL PROCESS
EP0029796A1 (en) * 1979-09-28 1981-06-03 Arbed S.A. System for measuring the height of the slag in a metallurgical vessel, and for determining its physical condition

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB976158A (en) * 1961-09-13 1964-11-25 Centre Nat Rech Metall The control of steel manufacturing processes
FR1430843A (en) * 1965-04-29 1966-03-04 Centre Nat Rech Metall Installation for controlling the smelting refining operation
FR2292769A1 (en) * 1974-11-28 1976-06-25 Centre Rech Metallurgique CAST IRON REFINING CONTROL PROCESS
EP0029796A1 (en) * 1979-09-28 1981-06-03 Arbed S.A. System for measuring the height of the slag in a metallurgical vessel, and for determining its physical condition

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
STAHL U. EISEN, vol. 88, no. 9, mai 1968, pages 457-459, D}sseldorf; W. POLLEHN "Akustisches Verfahren zur Steuerung von Blasprozessen an Sauerstoffaufblas-Konvertern" *

Also Published As

Publication number Publication date
EP0130960A2 (en) 1985-01-09

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Inventor name: RAMELOT, DANIEL LEON

Inventor name: FISCHBACH, JEAN-PAUL FRANCOIS