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WO2000061823A1 - Procede et dispositif pour faire couler une matiere fondue metallique contenue dans des cuves metallurgiques - Google Patents

Procede et dispositif pour faire couler une matiere fondue metallique contenue dans des cuves metallurgiques Download PDF

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Publication number
WO2000061823A1
WO2000061823A1 PCT/EP2000/003064 EP0003064W WO0061823A1 WO 2000061823 A1 WO2000061823 A1 WO 2000061823A1 EP 0003064 W EP0003064 W EP 0003064W WO 0061823 A1 WO0061823 A1 WO 0061823A1
Authority
WO
WIPO (PCT)
Prior art keywords
vessel
gas
metallurgical
metallurgical melting
tapping
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.)
Ceased
Application number
PCT/EP2000/003064
Other languages
German (de)
English (en)
Other versions
WO2000061823B1 (fr
Inventor
Karl-Heinz Deppner
Wei-Ping Wu
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.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
SMS Demag AG
Schloemann Siemag 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 SMS Schloemann Siemag AG, SMS Demag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Priority to DE50001056T priority Critical patent/DE50001056D1/de
Priority to JP2000610871A priority patent/JP2002541329A/ja
Priority to AT00926821T priority patent/ATE230802T1/de
Priority to CA002366193A priority patent/CA2366193A1/fr
Priority to SK1438-2001A priority patent/SK14382001A3/sk
Priority to EP00926821A priority patent/EP1183397B1/fr
Priority to MXPA01010238A priority patent/MXPA01010238A/es
Priority to BR0009418-8A priority patent/BR0009418A/pt
Publication of WO2000061823A1 publication Critical patent/WO2000061823A1/fr
Publication of WO2000061823B1 publication Critical patent/WO2000061823B1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C21C5/4693—Skull removal; Cleaning of the converter mouth

Definitions

  • the invention relates to a method and a device for tapping metal melts, preferably steel melts, from metallurgical melting vessels, such as electric arc furnaces, through a tap opening arranged in the bottom of the vessel, the metal melt being covered with slag melt at the time of tapping.
  • a vortex forms from the tap opening and runs obliquely to the vessel wall.
  • a hollow vortex ultimately develops, which also captures and swirls parts of the slag melt floating on the molten metal, so that the originally existing separation between molten metal and molten slag is no longer present and slag melt is discharged downwards together with the molten metal through the tap opening.
  • the oxidic slag conveyed into the melting pan with the molten metal in this way brings oxygen with it and leads, for example, to Increased consumption of aluminum for the required deoxidation, synthetic slag for the absorption of the oxides and calcium for the modification of the oxide inclusions.
  • the oxidation product alumina (Al 2 0 3 ) deteriorates the casting properties and the oxygen from the FeO in the slag furthermore makes desulphurization and degassing more difficult.
  • the slag melt can also come into direct contact with the tap opening. This slag run-on occurs when, when tilting back in the case of tiltable metallurgical vessels, for example in the case of electric arc furnaces, despite high Tilting speed, the slag melt flows back quickly beyond the metal melt.
  • the measure according to the invention of arranging at least one nozzle in the immediate vicinity of the tap opening, through which a neutral gas or a corresponding gas mixture is blown into the metallurgical melting vessel in a jet with high pulse energy removes the slag melt from the metal melt surface in the area of the tap opening (blown away) ). This ensures that, despite the formation of a vortex in the molten metal, slag tracking can no longer take place and slag tracking is also successfully prevented by this process by means of the correspondingly powerful gas jet.
  • the strength and the rate of injection of the gas jet is regulated by a valve station which is connected to a compressed gas container or a compressed gas generation system.
  • a gas or gas mixture is used which is neutral with respect to the further use and processing of the molten metal, such as a noble gas.
  • the valve station is connected to a measuring and control system by means of which the start time, the duration and the intensity of the gas injection are automatically monitored and regulated.
  • a measuring and control system by means of which the start time, the duration and the intensity of the gas injection are automatically monitored and regulated.
  • one or more nozzles are arranged in the area of the tap opening in such a way that complete removal of the slag layer from the metal surface is certainly achieved.
  • the size, shape, number and arrangement (in the side vessel wall and / or in the vessel lid, angle to the vessel bottom) of the nozzles are adapted to the size and design of the metallurgical vessel and the size of the bath surface, the nozzle outlet openings being above and / or below the Bath mirror can be.
  • Fig. 2 is a partial section of a metallurgical vessel in vertical section
  • Fig. 3 is a block diagram of the device according to the invention.
  • a metallurgical vessel 5 is shown at the time of tapping.
  • This exemplary embodiment is a conventional electric arc furnace, the electrodes not being shown.
  • the left-hand oriel there is a tap opening 10 in the vessel bottom 13 through which the molten metal 2 flows into a melting pan 11 with a pouring jet 6 arranged below the metallurgical vessel 5.
  • the melting pan 11 is located on a pan carriage 8 or the weighing cells 7 arranged there, by means of which the amount of metal flowing into the melting pan 11 can be detected continuously.
  • the slag melt 1 floats above the molten metal 2, into which the vortex 4 generated by the tapping process extends almost to the bath level 15.
  • two nozzles 3 are arranged in the lateral vessel wall 12, the nozzle outlet openings 14 of which are directed here against the slag layer 1 from above and from below.
  • the gas supply lines 25 (FIG. 3), through which the nozzles 3 are acted upon by the gas to be injected, and also the valve station 16 (FIG. 3) and the measuring and control system 20 (FIG. 3) are not shown in FIG. 1.
  • Figure 2 shows an enlarged section of the tapping part of the melting vessel 5, which is in a tilted position.
  • a nozzle 3 is arranged in the lateral vessel wall 12 almost parallel to the vessel bottom 13 and inclined slightly upwards.
  • the gas jet 9 pushes the slag melt 1 above the metal melt 2 back from the tap opening 10 to such an extent that the slag melt no longer comes into contact with the vortex 4 and slag entrainment or slag follow-up through the tap hole 10 cannot be done.
  • FIG 3 is shown in a block diagram, in which way Melting vessel 5 is functionally connected to the valve station 16 and the measuring and control system 20.
  • the measuring pulses obtained on the weighing cells 7 due to the pouring jet 6 flowing into the melting pan 11 and the measuring pulses (tilting position, melting bath height) recorded on the melting vessel 5 are fed into the measuring and control system 20 via the measuring lines 19, 22. From this measuring and control system 20, the control pulses required for controlling the compressed gas are then sent to the valve station 16 via the control line 21.
  • the pressurized gas from a pressurized gas container 18 and / or from a pressurized gas generation system 17 via the supply lines 23, 24 at the valve station 16 is then blown into the metallurgical melting vessel 5 via the gas supply 25 and controlled by the measuring and control system 20.
  • the invention is not limited to the metallurgical vessels (electric arc furnaces / EAF) shown in the drawing figures, but can also be used in other metallurgical vessels in which the tap opening is in the bottom of the vessel and in which there is a risk of slag running or running through the tap opening during of the racking.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Details (AREA)

Abstract

L'invention vise à permettre d'éviter, lors de la coulée d'une matière fondue métallique (2) contenue dans une cuve métallurgique (5) présentant un trou de coulée (10) situé au fond (13) de la cuve, que le laitier en fusion (1) ne s'écoule avec la matière fondue métallique ou à la suite de cette dernière. A cet effet, un jet de gaz (9) présentant une grande énergie d'impulsion est utilisé pour chasser de la surface de la matière métallique en fusion, le laitier en fusion (1) dans la zone du trou de coulée (10).
PCT/EP2000/003064 1999-04-10 2000-04-06 Procede et dispositif pour faire couler une matiere fondue metallique contenue dans des cuves metallurgiques Ceased WO2000061823A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE50001056T DE50001056D1 (de) 1999-04-10 2000-04-06 Verfahren und vorrichtung zum abstechen von metallschmelzen aus metallurgischen schmelzgefässen
JP2000610871A JP2002541329A (ja) 1999-04-10 2000-04-06 冶金用の溶融容器から金属溶湯を出湯するための方法および装置
AT00926821T ATE230802T1 (de) 1999-04-10 2000-04-06 Verfahren und vorrichtung zum abstechen von metallschmelzen aus metallurgischen schmelzgefässen
CA002366193A CA2366193A1 (fr) 1999-04-10 2000-04-06 Procede et dispositif pour faire couler une matiere fondue metallique contenue dans des cuves metallurgiques
SK1438-2001A SK14382001A3 (sk) 1999-04-10 2000-04-06 Spôsob a zariadenie na odpich roztaveného kovu z metalurgických taviacich nádob
EP00926821A EP1183397B1 (fr) 1999-04-10 2000-04-06 Procede et dispositif pour faire couler une matiere fondue metallique contenue dans des cuves metallurgiques
MXPA01010238A MXPA01010238A (es) 1999-04-10 2000-04-06 Procedimiento y dispositivo para la sangria de fundidos metalicos desde recipientes de fundido metalurgicos.
BR0009418-8A BR0009418A (pt) 1999-04-10 2000-04-06 Processo e dispositivo para extrair metais em fusão de recipientes de fusão metalúrgicos

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19916232.8 1999-04-10
DE19916232A DE19916232A1 (de) 1999-04-10 1999-04-10 Verfahren und Vorrichtung zum Abstechen von Metallschmelzen aus metallurgischen Schmelzgefäßen

Publications (2)

Publication Number Publication Date
WO2000061823A1 true WO2000061823A1 (fr) 2000-10-19
WO2000061823B1 WO2000061823B1 (fr) 2001-02-01

Family

ID=7904145

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/003064 Ceased WO2000061823A1 (fr) 1999-04-10 2000-04-06 Procede et dispositif pour faire couler une matiere fondue metallique contenue dans des cuves metallurgiques

Country Status (12)

Country Link
EP (1) EP1183397B1 (fr)
JP (1) JP2002541329A (fr)
AT (1) ATE230802T1 (fr)
BR (1) BR0009418A (fr)
CA (1) CA2366193A1 (fr)
DE (2) DE19916232A1 (fr)
ES (1) ES2190964T3 (fr)
MX (1) MXPA01010238A (fr)
SK (1) SK14382001A3 (fr)
TR (1) TR200102932T2 (fr)
TW (1) TW538127B (fr)
WO (1) WO2000061823A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11306017B2 (en) 2016-11-25 2022-04-19 Korea Hydro & Nuclear Power Co.; LTD Mold supporting device for forming uniform molten solidified body, and method for forming uniform molten solidified body

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10014712A1 (de) * 2000-03-24 2001-09-27 Sms Demag Ag Verfahren und Vorrichtung zum schlackenfreien Ausgießen von Metallschmelzen aus metallurgischen Schmelzgefäßen
DE10117181C1 (de) * 2001-04-05 2002-10-31 Georgsmarienhuette Gmbh Verfahren und Vorrichtung zur Verhinderung des Mitfließens von Schlacke beim Abstich einer Stahlschmelze
EP2803927A1 (fr) * 2013-05-17 2014-11-19 Siemens VAI Metals Technologies GmbH Récipient de four métallurgique et son procédé de fonctionnement
CN112091206B (zh) * 2019-05-31 2021-07-16 宝山钢铁股份有限公司 一种安全可靠的铁水预处理自动扒渣方法和系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0321861A2 (fr) * 1987-12-22 1989-06-28 MANNESMANN Aktiengesellschaft Récipient basculant métallurgique
US5203909A (en) * 1991-10-15 1993-04-20 Ltv Steel Company, Inc. Method and apparatus for slag free casting
JPH0857599A (ja) * 1994-08-26 1996-03-05 Nisshin Steel Co Ltd タンディッシュ内スラグの除去方法および装置ならびに連続鋳造装置
JPH10176212A (ja) * 1996-12-18 1998-06-30 Sumitomo Metal Ind Ltd 溶鋼の排出時におけるスラグ流出防止方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0321861A2 (fr) * 1987-12-22 1989-06-28 MANNESMANN Aktiengesellschaft Récipient basculant métallurgique
US5203909A (en) * 1991-10-15 1993-04-20 Ltv Steel Company, Inc. Method and apparatus for slag free casting
JPH0857599A (ja) * 1994-08-26 1996-03-05 Nisshin Steel Co Ltd タンディッシュ内スラグの除去方法および装置ならびに連続鋳造装置
JPH10176212A (ja) * 1996-12-18 1998-06-30 Sumitomo Metal Ind Ltd 溶鋼の排出時におけるスラグ流出防止方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 07 31 July 1996 (1996-07-31) *
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11 30 September 1998 (1998-09-30) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11306017B2 (en) 2016-11-25 2022-04-19 Korea Hydro & Nuclear Power Co.; LTD Mold supporting device for forming uniform molten solidified body, and method for forming uniform molten solidified body

Also Published As

Publication number Publication date
JP2002541329A (ja) 2002-12-03
SK14382001A3 (sk) 2002-09-10
CA2366193A1 (fr) 2000-10-19
EP1183397A1 (fr) 2002-03-06
TR200102932T2 (tr) 2002-05-21
MXPA01010238A (es) 2002-05-06
BR0009418A (pt) 2002-01-02
ATE230802T1 (de) 2003-01-15
DE19916232A1 (de) 2000-10-12
WO2000061823B1 (fr) 2001-02-01
TW538127B (en) 2003-06-21
EP1183397B1 (fr) 2003-01-08
ES2190964T3 (es) 2003-09-01
DE50001056D1 (de) 2003-02-13

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