EP0274557B1 - Installation for the introduction of powdery agents into a melting ladle - Google Patents
Installation for the introduction of powdery agents into a melting ladle Download PDFInfo
- Publication number
- EP0274557B1 EP0274557B1 EP87101652A EP87101652A EP0274557B1 EP 0274557 B1 EP0274557 B1 EP 0274557B1 EP 87101652 A EP87101652 A EP 87101652A EP 87101652 A EP87101652 A EP 87101652A EP 0274557 B1 EP0274557 B1 EP 0274557B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reagents
- lance
- torpedo
- ladle
- melting
- 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
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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
- C21C5/4606—Lances or injectors
- C21C5/4613—Refractory coated lances; Immersion lances
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/06—Constructional features of mixers for pig-iron
Definitions
- the invention relates to a device (according to the preamble of the claim) for introducing powdered reagents into a melting pan.
- the reagents emerging from the lance end initially only reach one half of the reaction space due to the inclination of the lance.
- Complete distribution and homogenization over the entire reaction space is only achieved in the course of a relatively long mixing or homogenization time, which impairs the metallurgical utilization of the reagents.
- a similar design is known from FR-A 2 314 943, in which the lance (a so-called “hockey stick lance”) is inclined at its end in the melt.
- the blowing effect is similar to that of a lance inclined over its entire length.
- the subject of DE-A 3 219 002 is also a multiple lance, in which each nozzle is assigned a single conveyor line or conveyor.
- the nozzle outlet openings are arranged tangentially in order to bring about a circular flow in the melting pan.
- JP-A 55 164 009 discloses a blowing device for a torpedo melting pan, in which a partition with an integrated lance divides the reaction space of the pan into two parts, into each of which the reagents are blown in with a lance opening parallel to the longitudinal axis of the pan.
- the invention has for its object to design a device according to the preamble of claim so that the powdered reagents supplied by the lance are evenly distributed in the shortest possible time in the entire reaction space.
- the improved homogeneity of the melt and the longer dwell time result in a significantly higher degree of utilization of the reagents and enable a reduction in the specific addition of reagents and thus a significant reduction in costs.
- the drawing shows a torpedo melting pan 1, into which a lance 2 protrudes, which is arranged approximately vertically and has two outlet nozzles 4, 5 pointing in opposite directions at its end in the melt 3.
- the outlet nozzles 4, 5 are arranged approximately horizontally and rotated relative to the longitudinal axis 6 of the melting pan 1 by an angle a of 30 ° to 60 °, preferably of approximately 45 ° .
- the pulverulent reagents supplied pneumatically by the lance 2 emerge from the nozzles 4, 5 in the opposite direction (arrows 7, 8) and produce a flow in both halves of the elongated reaction space, which leads to a rapid and uniform distribution of the reagents over the entire reaction space leads.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
- Manufacture Of Iron (AREA)
- Coating By Spraying Or Casting (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung (entsprechend dem Oberbegriff des Patentanspruches) zum Einbringen von pulverförmigen Reagenzien in eine Schmelzpfanne.The invention relates to a device (according to the preamble of the claim) for introducing powdered reagents into a melting pan.
Bei der Behandlung einer Schmelze mit injizierten pulverförmigen Reagenzien, beispielsweise bei der Roheisenentschwefelung mit einem Calciumkarbid-Gemisch, kommt es darauf an, die Reagenzien so zuzugeben, daß eine bestmögliche Ausnutzung der Reagenzien in der Schmelze erreicht wird.When treating a melt with injected powdered reagents, for example when hot metal desulphurization with a calcium carbide mixture, it is important to add the reagents so that the best possible use of the reagents in the melt is achieved.
Es ist aus der Praxis bekannt, pulverförmige Reagenzien in eine Schmelzpfanne mittels einer geraden Lanze einzubringen, die gegenüber der Vertikalen um einen Winkel von 10 bis 30° geneigt ist und die an ihrem in der Schmelze befindlichen Ende eine Austrittsöffnung aufweist, durch die die Reagenzien etwa parallel zur Lanzenachse in die Schmelze eingeblasen werden.It is known from practice to introduce powdered reagents into a melting pan by means of a straight lance which is inclined at an angle of 10 to 30 ° with respect to the vertical and which has an outlet opening at its end in the melt through which the reagents pass approximately be blown into the melt parallel to the lance axis.
Bei dieser bekannten Ausführung gelangen die aus dem Lanzenende austretenden Reagenzien aufgrund der Neigung der Lanze zunächst nur in die eine Hälfte des Reaktionsraumes. Eine vollständige Verteilung und Homogenisierung über den gesamten Reaktionsraum wird erst im Laufe einer verhältnismäßig langen Misch- bzw. Homogenisierzeit erreicht, was die metallurgische Ausnutzung der Reagenzien beeinträchtigt.In this known embodiment, the reagents emerging from the lance end initially only reach one half of the reaction space due to the inclination of the lance. Complete distribution and homogenization over the entire reaction space is only achieved in the course of a relatively long mixing or homogenization time, which impairs the metallurgical utilization of the reagents.
Eine ähnliche Ausführung ist durch die FR-A 2 314 943 bekannt, bei der die Lanze (eine sogenannte "Hockeystich-Lanze") an ihrem in der Schmelze befindlichen Ende schräg geneigt ist. Der Einblaseffekt ist ähnlich wie bei einer über die ganze Länge geneigten Lanze.A similar design is known from FR-A 2 314 943, in which the lance (a so-called "hockey stick lance") is inclined at its end in the melt. The blowing effect is similar to that of a lance inclined over its entire length.
Durch die DE-B 2 225 810 ist ferner eine sich um ihre Längsachse drehende Blaslanze mit zwei nach entgegengesetzten Richtungen weisenden Öffnungen bekannt.From DE-B 2 225 810 a blowing lance rotating about its longitudinal axis with two openings pointing in opposite directions is also known.
Gegenstand der DE-A 3 219 002 ist weiterhin eine Mehrfachlanze, bei der jeder Düse eine einzelne Förderstrecke bzw. Fördereinrichtung zugeordnet ist. Die Düsenaustrittsöffnungen sind hierbei tangential angeordnet, um in der Schmelzpfanne eine kreisförmige Strömung herbeizuführen.The subject of DE-A 3 219 002 is also a multiple lance, in which each nozzle is assigned a single conveyor line or conveyor. The nozzle outlet openings are arranged tangentially in order to bring about a circular flow in the melting pan.
Durch die US-A 4 326 701 ist weiterhin eine dem Oberbegriff des Patentanspruches entsprechende Vorrichtung bekannt, bei der die im Zentrum einer konischen Schmelzpfanne vorgesehene, etwa vertikal angeordnete Lanze an ihrem in der Schmelze befindlichen Ende mit zwei in entgegengesetzte Richtungen weisenden Austrittsdüsen versehen ist.From US-A 4 326 701 a device is also known according to the preamble of the patent claim, in which the approximately vertically arranged lance provided in the center of a conical melting pan is provided at its end in the melt with two outlet nozzles pointing in opposite directions.
Schließlich ist durch die JP-A 55 164 009 eine Einblasvorrichtung für eine Torpedoschmelzpfanne bekannt, bei der eine Trennwand mit integrierter Lanze den Reaktionsraum der Pfanne in zwei Teile unterteilt, in die die Reagenzien jeweils mit einer Lanzenöffnung parallel zur Pfannenlängsachse eingeblasen werden.Finally, JP-A 55 164 009 discloses a blowing device for a torpedo melting pan, in which a partition with an integrated lance divides the reaction space of the pan into two parts, into each of which the reagents are blown in with a lance opening parallel to the longitudinal axis of the pan.
Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung entsprechend dem Oberbegriff des Patentanspruches so auszubilden, daß die durch die Lanze zugeführten pulverförmigen Reagenzien in kürzestmöglicher Zeit gleichmäßig im gesamten Reaktionsraum verteilt werden.The invention has for its object to design a device according to the preamble of claim so that the powdered reagents supplied by the lance are evenly distributed in the shortest possible time in the entire reaction space.
Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruches gelöst.According to the invention, this object is achieved by the characterizing features of the patent claim.
Werden die Reagenzien mittels einer derart ausgebildeten Vorrichtung in die Torpedopfanne eingeführt, so baut sich sofort in beiden Hälften des Reaktionsraumes eine Strömung auf, die rasch zu einer gleichmäßigen Verteilung der Reagenzien über den gesamten Reaktionsraum führt. Auf diese Weise ergibt sich ein verbesserter Kontakt zwischen den Reagenzien und der Schmelze. Überkonzentrationen der injizierten Reagenzien in einzelnen Bereichen des Reaktionsraumes werden auf diese Weise vermieden.If the reagents are introduced into the torpedo pan by means of a device designed in this way, a flow immediately builds up in both halves of the reaction space, which quickly leads to a uniform distribution of the reagents over the entire reaction space. This results in improved contact between the reagents and the melt. In this way, excess concentrations of the injected reagents in individual areas of the reaction space are avoided.
Die verbesserte Homogenität der Schmelze sowie die verlängerte Verweilzeit ergeben einen deutlich erhöhten Ausnutzungsgrad der Reagenzien und ermöglichen eine Verringerung der spezifischen Reagenzienzugabe und damit eine deutliche Kostenreduzierung.The improved homogeneity of the melt and the longer dwell time result in a significantly higher degree of utilization of the reagents and enable a reduction in the specific addition of reagents and thus a significant reduction in costs.
Weitere durch die Erfindung erreichte Vorteile bestehen in einer Verringerung des Anteiles an Altschlacken, einer Verringerung der Pfannenabreinigung (beispielsweise durch Sodazugabe), einem höheren Füllungsgrad der Torpedo-Schmelzpfannen und in einer Verringerung der spezifischen Feuerfestkosten bei der Torpedozustellung.Further advantages achieved by the invention are a reduction in the proportion of old slag, a reduction in pan cleaning (for example by adding soda), a higher degree of filling of the torpedo melting pans and in a reduction in the specific refractory costs for the torpedo delivery.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch veranschaulicht. Es zeigen
- Fig.1 einen Vertikalschnitt durch eine erfindungsgemäße Vorrichtung mit einer in einer Torpedopfanne angeordneten Lanze,
- Fig.2 eine Aufsicht auf die Anordnung gemäß Fig.1.
- 1 shows a vertical section through a device according to the invention with a lance arranged in a torpedo pan,
- 2 shows a top view of the arrangement according to FIG.
Die Zeichnung zeigt eine Torpedo-Schmelzpfanne 1, in die eine Lanze 2 hineinragt, die etwa vertikal angeordnet ist und an ihrem in der Schmelze 3 befindlichen Ende zwei in entgegengesetzte Richtungen weisende Austrittsdüsen 4, 5 aufweist. Die Austrittsdüsen 4, 5 sind etwa horizontal angeordnet und gegenüber der Längsachse 6 der Schmelzpfanne 1 um einen Winkel a von 30° bis 60°, vorzugsweise von etwa 45°, gedreht.The drawing shows a torpedo melting pan 1, into which a
Die durch die Lanze 2 pneumatisch zugeführten pulverförmigen Reagenzien treten in entgegengesetzter Richtung (Pfeile 7, 8) aus den Düsen 4, 5 aus und erzeugen in beiden Hälften des langgestreckten Reaktionsraumes eine Strömung, die zu einer raschen und gleichmäßigen Verteilung der Reagenzien über den gesamten Reaktionsraum führt.The pulverulent reagents supplied pneumatically by the
Claims (1)
- Device for introducing powdered reagents into a torpedo ladle (1), containing a lance (2) which is arranged approximately vertically in the torpedo ladle, serves for the pneumatic delivery of the reagents, and at its end which is located in the melt (2) is provided with two outlet nozzles (4, 5) which are arranged approximately horizontally and point in opposite directions, characterised in that the outlet nozzles (4, 5) are rotated by a fixed angle (a) between 30° and 60°, preferably approximately 45°, with respect to the longitudinal axis (6) of the torpedo melting ladle (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT87101652T ATE54334T1 (en) | 1986-12-12 | 1987-02-06 | DEVICE FOR LOADING POWDER REAGENTS INTO A MELTING LADLE. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8633343U | 1986-12-12 | ||
| DE8633343U DE8633343U1 (en) | 1986-12-12 | 1986-12-12 | Device for introducing powdered reagents into a melting pan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0274557A1 EP0274557A1 (en) | 1988-07-20 |
| EP0274557B1 true EP0274557B1 (en) | 1990-07-04 |
Family
ID=6801099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP87101652A Expired - Lifetime EP0274557B1 (en) | 1986-12-12 | 1987-02-06 | Installation for the introduction of powdery agents into a melting ladle |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0274557B1 (en) |
| AT (1) | ATE54334T1 (en) |
| DE (2) | DE8633343U1 (en) |
| ES (1) | ES2016574B3 (en) |
Families Citing this family (1)
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2623264A1 (en) * | 1975-06-16 | 1976-12-30 | Jones & Laughlin Steel Corp | LANCE AND METHOD FOR INTRODUCING A MIXTURE OF REACTIVE PARTICULATE MATERIAL AND A CARRIER GAS INTO MELTED IRON TO BE DESULFURIZED |
| US4326701A (en) * | 1979-09-29 | 1982-04-27 | Kaiser Steel Corporation | Lance apparatus |
| JPS5822339A (en) * | 1981-07-30 | 1983-02-09 | Denka Consult & Eng Co Ltd | Double-pipe multi-hole lance |
-
1986
- 1986-12-12 DE DE8633343U patent/DE8633343U1/en not_active Expired
-
1987
- 1987-02-06 EP EP87101652A patent/EP0274557B1/en not_active Expired - Lifetime
- 1987-02-06 ES ES87101652T patent/ES2016574B3/en not_active Expired - Lifetime
- 1987-02-06 AT AT87101652T patent/ATE54334T1/en not_active IP Right Cessation
- 1987-02-06 DE DE8787101652T patent/DE3763585D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE3763585D1 (en) | 1990-08-09 |
| EP0274557A1 (en) | 1988-07-20 |
| ATE54334T1 (en) | 1990-07-15 |
| ES2016574B3 (en) | 1990-11-16 |
| DE8633343U1 (en) | 1987-02-12 |
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