EP0342395A1 - Device for introduction of powdery agents into a melting ladle - Google Patents

Device for introduction of powdery agents into a melting ladle Download PDF

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Publication number
EP0342395A1
EP0342395A1 EP89107446A EP89107446A EP0342395A1 EP 0342395 A1 EP0342395 A1 EP 0342395A1 EP 89107446 A EP89107446 A EP 89107446A EP 89107446 A EP89107446 A EP 89107446A EP 0342395 A1 EP0342395 A1 EP 0342395A1
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EP
European Patent Office
Prior art keywords
pan
lance
axis
reagents
introduction
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.)
Granted
Application number
EP89107446A
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German (de)
French (fr)
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EP0342395B1 (en
Inventor
Frank Dr.-Ing. Schaberg
Heribert Dipl.-Ing. Martens
Peter Dipl.-Ing. Pöhlmann
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
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Publication date
Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Priority to AT89107446T priority Critical patent/ATE77840T1/en
Publication of EP0342395A1 publication Critical patent/EP0342395A1/en
Application granted granted Critical
Publication of EP0342395B1 publication Critical patent/EP0342395B1/en
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    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
    • 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
    • C21C5/4606—Lances or injectors
    • C21C5/4613—Refractory coated lances; Immersion lances

Definitions

  • the invention relates to a device (according to the preamble of claim 1) for introducing powdered reagents into a melting pan.
  • melt treatment with injected powdered reagents for example in hot metal desulfurization or steel treatment, it is important to achieve the best possible use of the reagents by optimally entering the reagents in order to reduce the process costs as much as possible.
  • the reagents have been introduced by means of a vertical lance arranged centrally to the pan axis, either through a vertical nozzle opening downwards or through one or more horizontal nozzle openings evenly distributed over the circumference of the lance.
  • the invention has for its object to design a device according to the preamble of claim 1 so that the introduction of the powdered reagents in the melting pan is further improved, so that a particularly favorable mixing results.
  • the lance is arranged eccentrically to the pan axis, the outlet nozzle or nozzles being directed into the larger region of the pan facing away from the peripheral wall of the pan near the lance and enclosing the pan axis.
  • the mixing time of the melt is significantly reduced compared to known designs, since the changed flow profile results in a more favorable mixing behavior.
  • the rapidly developing flow prevents over-concentrations of the powdered powdered reagents in the melt, thereby increasing the degree of utilization and consequently reducing the specific addition quantities and thus the total process costs.
  • a reduction in the specific addition amounts is also achieved by increasing the accuracy with the device according to the invention.
  • a lance 2 arranged vertically and centrally to the axis of the melting pan 1, which at its lower end has a downwardly directed nozzle opening 2a and a number of horizontal nozzle openings evenly distributed over the circumference, e.g. B. 2b, 2c is provided.
  • the hatched area 3 in FIG. 2 extends approximately uniformly around the lance 2 and is a so-called "rinsing spot", i. H. an area in which the reagents blown out of the nozzle openings enter the melt 4.
  • the pneumatically blown powdered reagents in the melt 4 are moved upward by the carrier air, a flow distribution resulting in the level marked by the dashed line 5, as indicated schematically by curve 6.
  • the flow is directed upwards in the middle area, but downwards in a relatively wide annular edge zone.
  • the lance 12 is arranged eccentrically to the axis 10 of the melting pan 11, being 0.2 to 0.8 times, preferably 0.4 to 0.6 times the pan radius R (measured at the bottom of the pan) ) is offset from the pan axis 10.
  • the lance 12 is provided at its lower end with two outlet nozzles 12a, 12b, which are offset from one another by an angle between 60 and 120 °, preferably by an angle between 80 and 100 °, the bisector 20 being the pan axis 10 cuts.
  • the two outlet nozzles 12a, 12b are directed into the larger region of the pan 11 facing away from the peripheral wall of the pan 11 close to the lance and including the pan axis 10, so that there is an elongated washing spot characterized by the area 13, the narrow extent of which extends from the lance 12 to a little bit about the axis 10 and its elongated extent extends transversely to it.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

The invention relates to apparatus for the introduction of reagents in powder form into a melting pan, in which the lance is arranged eccentrically with respect to the pan axis and the outlet nozzles are directed into the larger region of the pan enclosing the pan axis. Such apparatus is distinguished by optimum mixing in of the added reagents.

Description

Die Erfindung betrifft eine Vorrichtung (entspre­chend dem Oberbegriff des Anspruches 1) zum Ein­bringen von pulverförmigen Reagenzien in eine Schmelzpfanne.The invention relates to a device (according to the preamble of claim 1) for introducing powdered reagents into a melting pan.

Bei der Schmelzenbehandlung mit injizierten pul­verförmigen Reagenzien, beispielsweise bei der Roheisenentschwefelung oder Stahlbehandlung, kommt es darauf an, durch eine optimale Eingabe der Reagenzien eine bestmögliche Ausnutzung der Reagenzien zu erzielen, um die Verfahrenskosten möglichst zu reduzieren.In melt treatment with injected powdered reagents, for example in hot metal desulfurization or steel treatment, it is important to achieve the best possible use of the reagents by optimally entering the reagents in order to reduce the process costs as much as possible.

Bisher werden die Reagenzien mittels einer zen­trisch zur Pfannenachse angeordneten, vertikalen Lanze eingebracht, und zwar entweder durch eine vertikale Düsenöffnung nach unten oder durch ein oder mehrere gleichmäßig über den Umfang der Lanze verteilte horizontale Düsenöffnungen.So far, the reagents have been introduced by means of a vertical lance arranged centrally to the pan axis, either through a vertical nozzle opening downwards or through one or more horizontal nozzle openings evenly distributed over the circumference of the lance.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung entsprechend dem Oberbegriff des An­spruches 1 so auszubilden, daß das Einbringen der pulverförmigen Reagenzien in die Schmelzpfanne noch weiter verbessert wird, so daß sich eine be­sonders günstige Durchmischung ergibt.The invention has for its object to design a device according to the preamble of claim 1 so that the introduction of the powdered reagents in the melting pan is further improved, so that a particularly favorable mixing results.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst. Zweckmäßige Ausgestaltungen der Erfindung sind Ge­genstand der Unteransprüche.This object is achieved by the characterizing features of claim 1. Appropriate embodiments of the invention are the subject of the dependent claims.

Erfindungsgemäß ist die Lanze exzentrisch zur Pfannenachse angeordnet, wobei die Austrittsdüse bzw. -düsen in den der lanzennahen Umfangswand der Pfanne abgewandten, die Pfannenachse einschließen­den größeren Bereich der Pfanne gerichtet sind.According to the invention, the lance is arranged eccentrically to the pan axis, the outlet nozzle or nozzles being directed into the larger region of the pan facing away from the peripheral wall of the pan near the lance and enclosing the pan axis.

Mit einer derartigen Lösung wird im Vergleich zu bekannten Ausführungen die Durchmischungszeit der Schmelze wesentlich verringert, da sich aufgrund des veränderten Strömungsprofiles ein günstigeres Durchmischungsverhalten ergibt. Die sich schnell aufbauende Strömung verhindert Überkonzentrationen der eingeblasenen pulverförmigen Reagenzien in der Schmelze, erhöht damit den Ausnutzungsgrad und ver­ringert infolgedessen die spezifischen Zugabemen­gen und damit die gesamten Verfahrenskosten.With such a solution, the mixing time of the melt is significantly reduced compared to known designs, since the changed flow profile results in a more favorable mixing behavior. The rapidly developing flow prevents over-concentrations of the powdered powdered reagents in the melt, thereby increasing the degree of utilization and consequently reducing the specific addition quantities and thus the total process costs.

Eine Reduzierung der spezifischen Zugabemengen wird auch durch die mit der erfindungsgemäßen Vor­richtung erzielte Erhöhung der Treffsicherheit erreicht.A reduction in the specific addition amounts is also achieved by increasing the accuracy with the device according to the invention.

Die Erfindung wird im folgenden anhand der Zeich­nung näher erläutert. In der Zeichnung zeigen

  • Fig. 1 und 2 Schnitt und Aufsicht einer bekann­ten Vorrichtung,
  • Fig. 3 und 4 Schnitt und Aufsicht einer erfin­dungsgemäßen Vorrichtung,
  • Fig. 5 und 6 Schnitt und Aufsicht der erfindungs­gemäßen Vorrichtung (um 90° gegen­über den Darstellungen in den Fig. 3 und 4 gedreht).
The invention is explained in more detail below with reference to the drawing. Show in the drawing
  • 1 and 2 section and top view of a known device,
  • 3 and 4 section and top view of a device according to the invention,
  • 5 and 6 section and top view of the device according to the invention (rotated by 90 ° with respect to the representations in FIGS. 3 and 4).

Die Fig. 1 und 2 zeigen den bekannten Stand der Technik, von dem die Erfindung ausgeht. Zum Ein­bringen pulverförmiger Reagenzien in eine Schmelz­pfanne 1 dient eine vertikal und zentrisch zur Achse der Schmelzpfanne 1 angeordnete Lanze 2, die an ihrem unteren Ende mit einer nach unten gerichteten Düsenöffnung 2a sowie einer Anzahl von gleichmäßig über den Umfang verteilten hori­zontalen Düsenöffnungen, z. B. 2b, 2c, versehen ist.1 and 2 show the known prior art, from which the invention is based. For the introduction of powdered reagents into a melting pan 1 is a lance 2 arranged vertically and centrally to the axis of the melting pan 1, which at its lower end has a downwardly directed nozzle opening 2a and a number of horizontal nozzle openings evenly distributed over the circumference, e.g. B. 2b, 2c is provided.

Die in Fig. 2 schraffierte Fläche 3 erstreckt sich annähernd gleichmäßig um die Lanze 2 und ist ein sogenannter "Spülfleck", d. h. ein Bereich, in dem die aus den Düsenöffnungen ausgeblasenen Reagenzien in die Schmelze 4 eintreten.The hatched area 3 in FIG. 2 extends approximately uniformly around the lance 2 and is a so-called "rinsing spot", i. H. an area in which the reagents blown out of the nozzle openings enter the melt 4.

Durch die Tägerluft werden die pneumatisch einge­blasenen pulverförmigen Reagenzien in der Schmelze 4 nach oben bewegt, wobei sich in dem durch die gestrichelte Linie 5 markierten Niveau eine Strö­mungsverteilung ergibt, wie sie durch die Kurve 6 schematisch angedeutet ist. Im mittleren Bereich ist die Strömung nach oben gerichtet, in einer verhältnismäßig breiten ringförmigen Randzone da­gegen nach unten.The pneumatically blown powdered reagents in the melt 4 are moved upward by the carrier air, a flow distribution resulting in the level marked by the dashed line 5, as indicated schematically by curve 6. The flow is directed upwards in the middle area, but downwards in a relatively wide annular edge zone.

Die Fig. 3 bis 6 veranschaulichen demgegenüber eine erfindungsgemäße Vorrichtung.3 to 6, on the other hand, illustrate a device according to the invention.

Die Lanze 12 ist exzentrisch zur Achse 10 der Schmelzpfanne 11 angeordnet, wobei sie um das 0,2- bis 0,8-fache, vorzugsweise um das 0,4- bis 0,6-fache des Pfannenradius R (gemessen am Boden der Pfanne) gegenüber der Pfannenachse 10 versetzt ist.The lance 12 is arranged eccentrically to the axis 10 of the melting pan 11, being 0.2 to 0.8 times, preferably 0.4 to 0.6 times the pan radius R (measured at the bottom of the pan) ) is offset from the pan axis 10.

Bei dem dargestellten Ausführungsbeispiel ist die Lanze 12 an ihrem unteren Ende mit zwei Austritts­düsen 12a, 12b versehen, die um einen Winkel zwi­schen 60 und 120°, vorzugsweise um einen Winkel zwischen 80 und 100°, gegeneinander versetzt sind, wobei die Winkelhalbierende 20 die Pfannenachse 10 schneidet.In the illustrated embodiment, the lance 12 is provided at its lower end with two outlet nozzles 12a, 12b, which are offset from one another by an angle between 60 and 120 °, preferably by an angle between 80 and 100 °, the bisector 20 being the pan axis 10 cuts.

Wie Fig. 4 zeigt, sind die beiden Austrittsdüsen 12a, 12b in den der lanzennahen Umfangswand der Pfanne 11 abgewandten, die Pfannenachse 10 ein­schließenden größeren Bereich der Pfanne 11 ge­richtet, so daß sich ein durch die Fläche 13 ge­kennzeichneter länglicher Spülfleck ergibt, des­sen schmale Ausdehnung von der Lanze 12 bis etwas über die Achse 10 reicht und dessen langgestreck­te Ausdehnung quer hierzu verläuft.As shown in FIG. 4, the two outlet nozzles 12a, 12b are directed into the larger region of the pan 11 facing away from the peripheral wall of the pan 11 close to the lance and including the pan axis 10, so that there is an elongated washing spot characterized by the area 13, the narrow extent of which extends from the lance 12 to a little bit about the axis 10 and its elongated extent extends transversely to it.

Betrachtet man die Strömung auf Höhe der Linie 15, so stellt man die durch die Kurve 16 gekennzeich­neten Verhältnisse fest. Charakteristisch ist hierbei auch die zentrale Einsattelung der Kurve 16, die in der um 90° gedrehten Ansicht gemäß Fig. 5 erkennbar ist. Allgemein läßt sich fest­stellen, daß sich bei der erfindungsgemäßen Aus­führung die eingeblasenen pulverförmigen Reagen­zien besser und schneller in der Schmelze 14 ver­teilen, wobei örtliche Überkonzentrationen vermie­den werden.If you look at the flow at the level of line 15, you can see the conditions marked by curve 16. The central saddling of curve 16, which can be seen in the view rotated by 90 ° according to FIG. 5, is also characteristic here. In general, it can be stated that, in the embodiment according to the invention, the powdered reagents blown in are distributed better and faster in the melt 14, local over-concentrations being avoided.

Claims (3)

1. Vorrichtung zum Einbringen von pulverförmigen Re­agenzien in eine Schmelzpfanne (11), enthaltend eine zur pneumatischen Zuführung der Reagenzien dienende Lanze (12),die an ihrem in der Schmelze (14)befindlichen Ende wenigstens eine Austritts­düse (12a, 12b) aufweist,
dadurch gekennzeichnet, daß die Lanze (12) ex­zentrisch zur Pfannenachse (10) angeordnet ist und die Austrittsdüse bzw. -düsen (12a, 12b) in den der lanzennahen Umfangswand der Pfanne ab­gewandten, die Pfannenachse (10) einschließenden größeren Bereich der Pfanne (11) gerichtet sind.1. Device for introducing powdered reagents into a melting pan (11), comprising a lance (12) serving for the pneumatic supply of the reagents, which has at least one outlet nozzle (12a, 12b) at its end in the melt (14),
characterized in that the lance (12) is arranged eccentrically to the pan axis (10) and the outlet nozzle or nozzles (12a, 12b) in the larger region of the pan (11) facing away from the peripheral wall of the pan near the lance and enclosing the pan axis (10) ) are directed. 2. Vorrichtung nach Anspruch 1, dadurch gekenn­zeichnet, daß die Lanze (12) um das 0,2- bis 0,8-fache, vorzugsweise um das 0,4- bis 0,6-fa­che des Pfannenradius (R) gegenüber der Pfan­nenachse (10) versetzt ist.2. Device according to claim 1, characterized in that the lance (12) by 0.2 to 0.8 times, preferably by 0.4 to 0.6 times the pan radius (R) relative to the pan axis (10) is offset. 3. Vorrichtung nach Anspruch 1, dadurch gekenn­zeichnet, daß die Lanze (12) zwei Austritts­düsen (12a, 12b) aufweist, die um einen Winkel zwischen 60 und 120°, vorzugsweise um einen Winkel zwischen 80 und 100°, gegeneinander versetzt sind, wobei die Winkelhalbierende (20) die Pfannenachse (10) schneidet.3. Apparatus according to claim 1, characterized in that the lance (12) has two outlet nozzles (12a, 12b) which are offset from one another by an angle between 60 and 120 °, preferably by an angle between 80 and 100 °, wherein the bisector (20) intersects the socket axis (10).
EP89107446A 1988-05-20 1989-04-25 Device for introduction of powdery agents into a melting ladle Expired - Lifetime EP0342395B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89107446T ATE77840T1 (en) 1988-05-20 1989-04-25 DEVICE FOR LOADING POWDER REAGENTS INTO A MELTING LADLE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3817358 1988-05-20
DE3817358A DE3817358A1 (en) 1988-05-20 1988-05-20 DEVICE FOR ADDING POWDER-SHAPED REAGENTS INTO A MELTING PAN

Publications (2)

Publication Number Publication Date
EP0342395A1 true EP0342395A1 (en) 1989-11-23
EP0342395B1 EP0342395B1 (en) 1992-07-01

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EP89107446A Expired - Lifetime EP0342395B1 (en) 1988-05-20 1989-04-25 Device for introduction of powdery agents into a melting ladle

Country Status (6)

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US (1) US5062615A (en)
EP (1) EP0342395B1 (en)
AT (1) ATE77840T1 (en)
CA (1) CA1315102C (en)
DE (2) DE3817358A1 (en)
ES (1) ES2032624T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4007390A1 (en) * 1990-03-08 1991-09-12 Krupp Polysius Ag METHOD AND DEVICE FOR ADDING POWDER-SHAPED REAGENTS INTO A Melting Pan
US11967740B2 (en) 2019-03-29 2024-04-23 Osaka Gas Co., Ltd. Electrochemical element, electrochemical element stack, electrochemical module, electrochemical device, and energy system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5828734A (en) 1985-07-10 1998-10-27 Ronald A. Katz Technology Licensing, Lp Telephone interface call processing system with call selectivity

Citations (3)

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Publication number Priority date Publication date Assignee Title
AT224673B (en) * 1960-03-31 1962-12-10 Hoesch Ag Device for introducing fine-grain additives into metal melts
DE2827277B2 (en) * 1977-06-21 1980-11-20 Outokumpu Oy, Outokumpu (Finnland) Device for refining melts with the aid of powdery substance (solid) and / or gas
US4341554A (en) * 1981-04-02 1982-07-27 Jones & Laughlin Steel Incorporated Process for desulfurizing steel

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FR1271633A (en) * 1960-08-02 1961-09-15 Siderurgie Fse Inst Rech Device for treating liquid ferrous metals by blowing a gas through an eccentric lance
US3545960A (en) * 1967-04-25 1970-12-08 Union Carbide Corp Alloy addition process
US3627294A (en) * 1970-03-25 1971-12-14 Atlantic Richfield Co Protection sleeve for dip tubes
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DE3311617C1 (en) * 1983-03-30 1984-10-25 Messer Griesheim Gmbh, 6000 Frankfurt Method and device for rinsing a molten metal, in particular steel, in a ladle
US4481032A (en) * 1983-08-12 1984-11-06 Pfizer Inc. Process for adding calcium to a bath of molten ferrous material

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
AT224673B (en) * 1960-03-31 1962-12-10 Hoesch Ag Device for introducing fine-grain additives into metal melts
DE2827277B2 (en) * 1977-06-21 1980-11-20 Outokumpu Oy, Outokumpu (Finnland) Device for refining melts with the aid of powdery substance (solid) and / or gas
US4341554A (en) * 1981-04-02 1982-07-27 Jones & Laughlin Steel Incorporated Process for desulfurizing steel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4007390A1 (en) * 1990-03-08 1991-09-12 Krupp Polysius Ag METHOD AND DEVICE FOR ADDING POWDER-SHAPED REAGENTS INTO A Melting Pan
EP0451473A1 (en) * 1990-03-08 1991-10-16 Krupp Polysius Ag Process and installation for feeding of pulverized agents into a melting ladle
US11967740B2 (en) 2019-03-29 2024-04-23 Osaka Gas Co., Ltd. Electrochemical element, electrochemical element stack, electrochemical module, electrochemical device, and energy system

Also Published As

Publication number Publication date
US5062615A (en) 1991-11-05
DE3817358A1 (en) 1989-11-30
EP0342395B1 (en) 1992-07-01
ES2032624T3 (en) 1993-02-16
CA1315102C (en) 1993-03-30
ATE77840T1 (en) 1992-07-15
DE58901760D1 (en) 1992-08-06

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