EP1183397B1 - Verfahren und vorrichtung zum abstechen von metallschmelzen aus metallurgischen schmelzgefässen - Google Patents
Verfahren und vorrichtung zum abstechen von metallschmelzen aus metallurgischen schmelzgefässen Download PDFInfo
- Publication number
- EP1183397B1 EP1183397B1 EP00926821A EP00926821A EP1183397B1 EP 1183397 B1 EP1183397 B1 EP 1183397B1 EP 00926821 A EP00926821 A EP 00926821A EP 00926821 A EP00926821 A EP 00926821A EP 1183397 B1 EP1183397 B1 EP 1183397B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- melt
- vessel
- gas
- metallurgical
- blowing
- 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.)
- Expired - Lifetime
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 41
- 239000002184 metal Substances 0.000 title claims abstract description 41
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 18
- 239000002893 slag Substances 0.000 claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 6
- 238000010891 electric arc Methods 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000161 steel melt Substances 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 23
- 238000002844 melting Methods 0.000 description 16
- 230000008018 melting Effects 0.000 description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
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 parting off Metal melts, preferably steel melts, from metallurgical Melting vessels, such as electric arc furnaces, by an in Vessel bottom arranged tapping opening, the at the time of tapping Metal melt is overlaid with slag melt.
- molten pool level falls, it forms from the tap opening Vortex, which runs obliquely to the vessel wall. If it continues to fall Melt pool level ultimately creates a hollow vortex, which is also part of the Metal melt floating slag melt captured and swirled so that the originally existing separation between molten metal and Slag melt is no longer present and slag melt together with the molten metal is discharged down through the tap hole.
- the oxidic slag conveyed into the melting pan with the molten metal thus brings oxygen with it and leads, for example, to the increased consumption of aluminum for the necessary deoxidation, of synthetic slag for the absorption of the oxides and calcium for the modification of the oxidic inclusions.
- the oxidation product alumina (Al 2 O 3 ) deteriorates the casting properties and the oxygen from the FeO in the slag continues to make desulphurization and degassing more difficult.
- US-A-5 203 909 proposes using a blowing lance in the area to blow a gas jet from the tap opening onto the slag melt from above, through which the slag melt is pushed away from the metal surface becomes.
- the disadvantage of this known method is the indentation of the Melt slag in the molten metal, which makes it especially during training of a vortex in the molten metal, the danger of slag running given is.
- EP-A-0 321 861 is a tiltable metallurgical vessel known, at least above the tap opening on the inside of the side wall a blowing device, preferably a burner, is provided by which the slag melt blown away from the surface of the metal melt can be.
- a blowing device preferably a burner
- it is provided with a side in the vessel wall
- Known rinsing device arranged directly above the tap opening Introduce gas bubbles into the molten metal below the bath surface, to thereby also, among other things, the slag melt from to displace the surface of the molten metal.
- the task is in the case of metallurgical vessels in the bottom of the vessel arranged tap opening with the characterizing features of claim 1 solved.
- the measure according to the invention in the immediate vicinity of the tap opening to arrange at least one nozzle through which a neutral gas or corresponding gas mixture in a jet with high pulse energy into the metallurgical melting vessel is blown in, in the area of the tap opening the slag melt is removed from the molten metal surface (blown away).
- the strength and the rate of injection of the gas jet is regulated by a valve station, those with a compressed gas tank or a compressed gas generation plant in Connection is established.
- one or more nozzles are in the area of the The tap opening is arranged so that it is certain that the Slag layer is reached from the metal surface.
- the size, shape, number and arrangement (in the side wall of the vessel and / or in the Vessel lid, angle to the vessel bottom) of the nozzles are the size and design of the metallurgical vessel and the size of the bath surface adapted the nozzle outlet openings are above and / or below the bath level can.
- a metallurgical vessel 5 is shown at the time of tapping. It this embodiment is a conventional one Electric arc furnace, the electrodes not being shown.
- the left oriel there is a tap opening 10 in the vessel bottom 13 through which the molten metal 2 in a sump 11 arranged below the metallurgical vessel 5 Pouring stream 6 flows.
- the melting pan 11 is located on a ladle car 8 or the weighing cells 7 arranged there, through which the continuously into the Melting pan 11 flowing metal amount can be detected. Above the Metal melt 2 floats the slag melt 1, in which the by The tapping process generated vortex 4 extends almost to the bathroom mirror 15.
- the nozzle outlet openings 14 here from above and from are directed against the slag layer 1 below. 1 are not shown the gas supply lines 25 (Fig. 3) through which the nozzles 3 with the gas to be injected and also the valve station 16 (FIG. 3) as well as the measurement and control system 20 (FIG. 3).
- Figure 2 shows an enlarged section of the tapping part of the melting vessel 5, which is in a tilted position.
- a nozzle 3 in the lateral vessel wall 12 almost parallel to the vessel bottom 13 and arranged slightly inclined upwards.
- the gas jet 9 the slag melt 1 above the metal melt 2 pushed far from the tap opening 10 that the slag melt with the vertebra 4 no longer come into contact and a slag idler or Cinder run through the tap opening 10 can not take place.
- FIG 3 is shown in a block diagram, in which way Melting vessel 5 with the valve station 16 and the measuring and control system 20 is functionally connected.
- the on the load cells 7 due to the in Melting pan 11 flowing pouring beam 6 received measuring pulses and the am Melting vessel 5 detected measuring pulses (tilt position, melt pool height) fed into the measuring and control system 20 via the measuring lines 19, 22.
- Out this measuring and control system 20 are then via the control line 21 for the Control of the compressed gas required control pulses to the valve station 16 given.
- the invention is not based on those shown in the drawing figures metallurgical vessels (electric arc furnace / EAF) limited, but also at other metallurgical vessels applicable, in which the tap opening is in the The bottom of the vessel and where there is a risk of slag trailing through the tap opening during tapping.
Description
- die Höhe des Schmelzbadspiegels im metallurgischen Schmelzgefäß,
- der Kippwinkel und die Kippgeschwindigkeit des metallurgischen Schmelzgefäßes,
- das Abstichgewicht der Metallschmelze in der Schmelzpfanne
- Fig. 1
- einen Vertikalschnitt durch ein metallurgisches Gefäß,
- Fig. 2
- ein Teilausschnitt eines metallurgischen Gefäßes im Vertikalschnitt,
- Fig. 3
- ein Blockschaltbild zur erfindungsgemäßen Vorrichtung.
Claims (9)
- Verfahren zum Abstechen von Metallschmelzen, vorzugsweise von Stahlschmelzen, aus metallurgischen Schmelzgefäßen wie beispielsweise Elektrolichtbogenöfen, durch eine im Gefäßboden angeordnete Abstichöffnung, wobei zum Zeitpunkt des Abstichs die Metallschmelze mit Schlackenschmelze überschichtet ist und während des Abstichs im Bereich der Abstichöffnung die Schlackenschmelze durch mindestens einen Gasstrahl, der durch mindestens eine Düse in das metallurgische Schmelzgefäß eingeblasen wird, von der Oberfläche der Metallschmelze entfernt (weggeblasen) wird, dadurch gekennzeichnet, dass im Bereich der Abstichöffnung (10) mindestens ein Gasstrahl (9) schräg von unten und mindestens ein Gasstrahl (9) schräg von oben gegen die Schlackenschmelze (1) gerichtet ist.
- Verfahren nach Anspruch 1 dadurch gekennzeichnet, dass die Stärke und die Einblasrate des Gasstrahls (9) durch eine Ventilstation (16) geregelt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass durch ein Mess- und Regelsystem (20) der Startzeitpunkt, die Dauer und die Intensität des Gaseinblasens automatisch überwacht und geregelt wird.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass zur automatischen Regelung des Gaseinblasens durch das Mess- und Regelsystem (20) mindestens einer der Parameter, nämlich die Höhe des Schmelzbadspiegels (15) im metallurgischen Schmelzgefäß (5), Kippwinkel und Kippgeschwindigkeit des Schmelzgefäßes (5) und/oder Abstichgewicht der Metallschmelze (2) in der Schmelzpfanne (11) verwendet wird.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass zum Einblasen ein neutrales Gas oder ein Gasgemisch, beispielsweise ein Edelgas, verwendet wird, das die weitere Bearbeitung und Verwendung der Metallschmelze (2) nicht negativ beeinflusst.
- Metallurgisches Schmelzgefäß (5) mit einer im Gefäßboden (13) angeordneten Abstichöffnung (10) und mit mindestens einer im Bereich der Abstichöffnung (10) durch die seitliche Gefäßwand (12) geführten Düse (3) zum Einblasen des Gasstrahls (9), zur Durchführung des Verfahrens nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Düsenaustrittsöffnungen (14) der Düsen (3) oberhalb und unterhalb des Badspiegels (15) angeordnet sind.
- Metallurgisches Schmelzgefäß (5) nach Anspruch 6, dadurch gekennzeichnet, dass die Größe, Form, Anzahl und Anordnung der Düsen (3) entsprechend der Größe der Badoberfläche ausgelegt sind.
- Metallurgisches Schmelzgefäß (5) nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass die Düsen (3) über eine Ventilstation (16) mit einer Druckgaserzeugungsvorrichtung (17) und/oder einem Druckgasbehälter (18) verbunden sind.
- Metallurgisches Schmelzgefäß (5) nach Anspruch 8, dadurch gekennzeichnet, dass die Ventilstation (16) mit einem Mess- und Regelsystem (20) verbunden ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19916232 | 1999-04-10 | ||
DE19916232A DE19916232A1 (de) | 1999-04-10 | 1999-04-10 | Verfahren und Vorrichtung zum Abstechen von Metallschmelzen aus metallurgischen Schmelzgefäßen |
PCT/EP2000/003064 WO2000061823A1 (de) | 1999-04-10 | 2000-04-06 | Verfahren und vorrichtung zum abstechen von metallschmelzen aus metallurgischen schmelzgefässen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1183397A1 EP1183397A1 (de) | 2002-03-06 |
EP1183397B1 true EP1183397B1 (de) | 2003-01-08 |
Family
ID=7904145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00926821A Expired - Lifetime EP1183397B1 (de) | 1999-04-10 | 2000-04-06 | Verfahren und vorrichtung zum abstechen von metallschmelzen aus metallurgischen schmelzgefässen |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP1183397B1 (de) |
JP (1) | JP2002541329A (de) |
AT (1) | ATE230802T1 (de) |
BR (1) | BR0009418A (de) |
CA (1) | CA2366193A1 (de) |
DE (2) | DE19916232A1 (de) |
ES (1) | ES2190964T3 (de) |
MX (1) | MXPA01010238A (de) |
SK (1) | SK14382001A3 (de) |
TR (1) | TR200102932T2 (de) |
TW (1) | TW538127B (de) |
WO (1) | WO2000061823A1 (de) |
Families Citing this family (5)
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 (de) * | 2013-05-17 | 2014-11-19 | Siemens VAI Metals Technologies GmbH | Metallurgisches Ofengefäß und Verfahren zu seinem Betrieb |
KR101918360B1 (ko) | 2016-11-25 | 2018-11-13 | 한국수력원자력 주식회사 | 균일한 용융고화체 형성을 위한 몰드 지지장치 및 균일한 용융고화체 형성방법 |
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 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3743575A1 (de) * | 1987-12-22 | 1989-07-13 | Krupp Gmbh | Verfahren zum abstechen einer metallschmelze und metallurgisches gefaess zur durchfuehrung des verfahrens |
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 |
-
1999
- 1999-04-10 DE DE19916232A patent/DE19916232A1/de not_active Withdrawn
-
2000
- 2000-04-06 MX MXPA01010238A patent/MXPA01010238A/es not_active Application Discontinuation
- 2000-04-06 CA CA002366193A patent/CA2366193A1/en not_active Abandoned
- 2000-04-06 TR TR2001/02932T patent/TR200102932T2/xx unknown
- 2000-04-06 DE DE50001056T patent/DE50001056D1/de not_active Expired - Fee Related
- 2000-04-06 WO PCT/EP2000/003064 patent/WO2000061823A1/de active IP Right Grant
- 2000-04-06 SK SK1438-2001A patent/SK14382001A3/sk unknown
- 2000-04-06 ES ES00926821T patent/ES2190964T3/es not_active Expired - Lifetime
- 2000-04-06 BR BR0009418-8A patent/BR0009418A/pt unknown
- 2000-04-06 JP JP2000610871A patent/JP2002541329A/ja not_active Withdrawn
- 2000-04-06 AT AT00926821T patent/ATE230802T1/de not_active IP Right Cessation
- 2000-04-06 EP EP00926821A patent/EP1183397B1/de not_active Expired - Lifetime
- 2000-04-08 TW TW089106526A patent/TW538127B/zh active
Also Published As
Publication number | Publication date |
---|---|
EP1183397A1 (de) | 2002-03-06 |
WO2000061823B1 (de) | 2001-02-01 |
MXPA01010238A (es) | 2002-05-06 |
SK14382001A3 (sk) | 2002-09-10 |
ATE230802T1 (de) | 2003-01-15 |
TR200102932T2 (tr) | 2002-05-21 |
DE19916232A1 (de) | 2000-10-12 |
TW538127B (en) | 2003-06-21 |
WO2000061823A1 (de) | 2000-10-19 |
CA2366193A1 (en) | 2000-10-19 |
JP2002541329A (ja) | 2002-12-03 |
DE50001056D1 (de) | 2003-02-13 |
BR0009418A (pt) | 2002-01-02 |
ES2190964T3 (es) | 2003-09-01 |
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