EP0013550A1 - Process and apparatus for the desulphurisation of molten ferrous metals - Google Patents
Process and apparatus for the desulphurisation of molten ferrous metals Download PDFInfo
- Publication number
- EP0013550A1 EP0013550A1 EP79930031A EP79930031A EP0013550A1 EP 0013550 A1 EP0013550 A1 EP 0013550A1 EP 79930031 A EP79930031 A EP 79930031A EP 79930031 A EP79930031 A EP 79930031A EP 0013550 A1 EP0013550 A1 EP 0013550A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- desulfurizing agent
- lance
- propellant gas
- argon
- cellular wheel
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002184 metal Substances 0.000 title description 2
- 229910052751 metal Inorganic materials 0.000 title description 2
- -1 ferrous metals Chemical class 0.000 title 1
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 14
- 230000001413 cellular effect Effects 0.000 claims abstract description 13
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 13
- 229910052786 argon Inorganic materials 0.000 claims abstract description 11
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 11
- 230000023556 desulfurization Effects 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 239000003380 propellant Substances 0.000 claims abstract description 8
- 239000007787 solid Substances 0.000 claims abstract description 5
- 239000003973 paint Substances 0.000 claims 1
- 239000000155 melt Substances 0.000 abstract description 9
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 description 17
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 10
- 239000011593 sulfur Substances 0.000 description 10
- 239000000654 additive Substances 0.000 description 6
- 230000000996 additive effect Effects 0.000 description 6
- 238000007796 conventional method Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910004709 CaSi Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000609666 Tuber aestivum Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000010959 steel Substances 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
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
-
- 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
- C21C1/02—Dephosphorising or desulfurising
Definitions
- the present invention relates to a method and an apparatus for desulfurizing iron melts.
- the desulfurization ratio (50 S beginning / 50 s end) falls with a decreasing initial sulfur content and that, using the known methods, an initial sulfur content of around 0.015% S can only be reduced to around 0.010% S. It should be noted that this cannot be regarded as a satisfactory result in terms of the desulfurization effect (% S removed / kg desulfurizing agent).
- the aim of the invention was therefore to propose a method and a device for the desulfurization of single melts which, particularly in the case of relatively low starting sulfur contents, can achieve a higher desulfurization effect than the conventional methods.
- this aim is achieved in a process which carefully treats an iron melts in a metal vessel with a desulphurization agent blown in by means of a propellant gas through a lance near the bottom, in that a sufficiently high constant propellant gas pressure is maintained in the lance and the true gas flow is continuously increased a mechanical feeder with an infinitely variable throughput of desulfurizing agent, and that an additional gas stream is passed through the bottom of the vessel into the melt during the treatment.
- the desulfurization agent which is preferably in the form of ecin granules, can be easily introduced into the metallurgical vessel near the bottom using a lance.
- Achniche locks in which the additive is fluidized to facilitate entry into the lance are e.g. described in DAS 1.292.693 and in DT-PS 2.303.978.
- the disadvantage of the devices, in which the solid additive is fluidized to loosen it and to facilitate its introduction into the lance, is mainly that fluidization systems are complicated, prone to malfunction and therefore also less noisy the entire amount of the additive to be used must be fluidized during the entire duration of the treatment and that the interaction between the fluidizing chamber and the supply and discharge lines must be compensated, which makes it difficult to control the amount of additive.
- the device required to carry out the process according to the invention essentially understands a storage container containing the desulfurizing agent and under argon pressure, which is connected via a cell ad blow-through path to a pressurized anger supply line and an argon-solid discharge line, which is connected in a movable lance opens
- the device according to the invention is additionally characterized by its simple structure and its reduced due date.
- the cellular wheel blower blower has a drive which can be regulated without problems.
- the latter enables an almost ideal control of the throughput of desulfurizing agent, which is simply accomplished by regulating the speed of rotation of the cell wheel without any change in the pressure conditions.
- Fig. 1 you can see the storage container (I) with the hopper (2) for the desulfurization agent and the upper argon feed (3).
- the primary container (1) is connected via the cellular wheel blow-through lock (4) into which the argon supply line (5) flows Argon solid material discharge line ((b) leading to the lance not shown.
- a steplessly adjustable motor (8) is used to drive the cellular wheel of the blown air blower (4).
- the cellular wheel Durehblassehleuse (4) shown in Figure 2 understands the actual cellular wheel (Z).
- the desulfurization agent stored under argon in the storage container (1) fills the cellular wheel sluice. After rotating the cell wheel 4) by 180 °, the material enters the through-channel (from where it is entrained into the line (6) through the argon supplied via the pressure line (5) and fed to the lance.
Abstract
Das Verfahren zum Entschwefeln von Eisenschmelzen sieht vor, diese in einem metallurgischen Gefäss mit einem in Bodennähe mittels eines Treibgases durch eine Lanze eingeblasenen Entschwefelungsmittel zu behandeln, wobei man in der Lanze einen genügend hohen konstanten Treibgasdruck aufrechterhält und den Treibgasstrom kontinuierlich mittels einer mechanischen Zugabeeinrichtung mit einer stufenlos regelbaren Durchsatzmenge an Entschwefelungsmittel speist, und im Verlauf der Behandlung einen zusätzlichen Gasstrom durch den Gefassboden in die Schmelze leitet. Die erforderliche Vorrichtung begreift im wesentlichen einen das Entschwefelungsmittel enthaltenden und unter Argondruck stehenden Vorratsbehälter (1), der über eine Zellenrad-Durchblasschleuse (4) mit einer unter Druck stehenden Argon-Zufuhrleitung (5) und einer Argon-Feststoff-Abfuhrleitund (6) verbunden ist, welche in eine bewegliche Lanze mundet. Die Zellenrad-Durchblasschleuse (4) weist einen stufenlos regelbaren Antrieb (8) auf, der eine nahezu ideale Steuerung des Durchsatzes an Entschwefelungsmittel, einfach durch Regelung der Umdrehungsgeschwindigkeit des Zellenrades ermoglicht, ohne daß hierbei irgendeine Veränderung der Druckverhältnisse eintritt.The process for the desulfurization of molten iron provides for treating it in a metallurgical vessel with a desulfurizing agent blown in through a lance by means of a propellant gas, while maintaining a sufficiently high constant propellant gas pressure in the lance and continuously adding a mechanical addition device to the propellant gas stream infinitely variable throughput of desulfurizing agent feeds, and in the course of the treatment leads an additional gas flow through the bottom of the vessel into the melt. The required device essentially understands a storage container (1) containing the desulfurizing agent and under argon pressure, which is connected via a cellular wheel blow-through lock (4) to a pressurized argon supply line (5) and an argon-solid discharge line (6) is which flows into a movable lance. The cellular wheel blow-through lock (4) has a continuously variable drive (8), which enables an almost ideal control of the throughput of desulfurizing agent, simply by regulating the rotational speed of the cellular wheel, without any change in the pressure conditions.
Description
Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zum Entschwefeln von Eisensehmelzen.The present invention relates to a method and an apparatus for desulfurizing iron melts.
Es ist seit Jahrzehnten bekannt Eisensehmelzen dadureh zu entsehwefeln, dass man mit Hilfe geeigneler Vorrichlungen Substanzen zusetzt, die in der Lage sind, bei hohen Temperaturen und unler reduzierenden Bedingungeu mit, dem in den Schmelzen enthaltenen Schwefel Verbindungen einzuteilen, welche sich in der über den Schmelzen anwesenden Schlachen-schicht absetzen. Solche Substanzen sind bspw CaSi, CaC2 . oder demische aus CaO und CaF2.It has been known for decades to desulphurise iron melts that, with the help of suitable devices, substances are added which are capable of dividing the sulfur contained in the melts at high temperatures and reducing conditions, which are found in the above the melts remove the slayer layer present. Such substances are, for example, CaSi, CaC 2 . or demix from CaO and CaF 2 .
Es hat sich herausgestellt, dass es die bekannten Ent-schwefelungsverfahren erlauben eine etwa 0, 023% S enthal-tende Eisenschmelze bis au etwa 0,012% S zu entsechwefeln, d.h. den Schwefelgehalt auf die Hülfte zu verringern. Diese Halbierung -des Schwefelgchaltes mittels konventionelier Verfahren ist jedoch nicht. mehr erreichbar, wenn der ursprüngliche Schwefelgehalt schon bei etwa 0,015% liegt.It has been found that the known desulfurization processes allow an iron melt containing about 0.023% S to be desulphurized to about 0.012% S, i.e. to reduce the sulfur content to the half. However, this halving of the sulfur content by means of a conventional method is not. more achievable when the original sulfur content is already around 0.015%.
Es verhält sich demnach so, dass der Entschwefelungsquo-lient (50 S Anfang/50 s Ende) mit sinkendem Anfangsschwefei-gehalt fällt und dass man, liber die bekannten Verfahren einen Anfangsschwefelgalt von etwa 0,015% S nur auf etwa 0,010% S reduzieren kann. Hierbei muss bemerkt werden, dass dies auch hinsichilich der Entschwefelnungswirkung (% S ent-fernt/kg Entsehwefelungsmittel) nicht als befriedigendes Resultat angesehen werden kann.It is therefore the case that the desulfurization ratio (50 S beginning / 50 s end) falls with a decreasing initial sulfur content and that, using the known methods, an initial sulfur content of around 0.015% S can only be reduced to around 0.010% S. It should be noted that this cannot be regarded as a satisfactory result in terms of the desulfurization effect (% S removed / kg desulfurizing agent).
Gleichzeitig ist hervorzuheben, dass Entsechwefelungsgelalte von 0,010 % S die man mittels konventioneller Verfahren ausgehend von etwa 0,015% S erhalten kann, den Metallurgen angesichts der Forderungen nach immer geringeren Schwefelge-halten im Stahl nicht, befriedigen.At the same time, it should be emphasized that desulphurization levels of 0.010% S, which can be obtained by conventional methods starting from approximately 0.015% S, do not satisfy metallurgists in view of the demands for ever lower sulfur contents in steel.
Das ziel der Erfindung bestand somit darin ein Verfahren und eine Vorrichlung zur Entschwefelung von Einsenselmelzen vorzuschlagen die es insbesondere im Falle von relativ niedrigen Ausgangssehwefelgehalten erlanben eine höhere Entschwefelungswirkung zu erreichen als die konventioneller Verfahren.The aim of the invention was therefore to propose a method and a device for the desulfurization of single melts which, particularly in the case of relatively low starting sulfur contents, can achieve a higher desulfurization effect than the conventional methods.
Erfindungsgemäss wird dieses Ziel bei einem Verfahren das vorsicht eine Eisensehmelze in einem metal lurgisehen Gefäss mit einem in Bodennähe mittels eines Treibgases durch eine Lanze eingeblasenen Entschwefelungsmitte zu behandeln, dadurch erreicht, dass man in der Lanze einen genügend hohen konstanten Treibgasdruck aufrechterhäl und den Trueubgasstrom kontinuicrlich Mittels einer mechanisehen Zugabeeinrichtung mit einer stufenlos regelbaren Durch-satzmenge an Entschwefelungsmittel speist, und dass man im Verlauf der Behandlung einen zusätzliehen Gasstrom durch den Gefässboden in die Schmelze leitet.According to the invention, this aim is achieved in a process which carefully treats an iron melts in a metal vessel with a desulphurization agent blown in by means of a propellant gas through a lance near the bottom, in that a sufficiently high constant propellant gas pressure is maintained in the lance and the true gas flow is continuously increased a mechanical feeder with an infinitely variable throughput of desulfurizing agent, and that an additional gas stream is passed through the bottom of the vessel into the melt during the treatment.
Die dem erfindungsgemässen Verfahren zugrundeliegende Idee geht von der Tatsache aus, dass bei relativ niedrigen Aus-gangskonzentralionen an Schwfel und erst. recht nach fort-geschriltener Entschwefelung die Wahrscheinlichkeit, dass noch Schwefel mit Entschwefelungsmitte zu Umsetzung kommt, immer geringer wird. Dem wird erfubdybgsgemäss dadurch ent-gegengewirkt, dass das Entschwefelungsmittel in konstanten Mengen und über eine längere Zeit während welcher eine Reaktionsmöglichkeit gegeben ist, zugesetzt wird und dass gleichzeitig eine bestmögliche Verleilung des Entseirwefe-lungsmittels innerhalb der in Bewegung versetzten schmelze erzielt wird.The idea on which the process according to the invention is based is based on the fact that with relatively low initial concentration concentrations of sulfur and especially after the desulphurization has been carried out, the likelihood that sulfur will still be reacted with the desulphurization agent will decrease. According to the invention, this is counteracted by adding the desulfurizing agent in constant amounts and over a longer period during which there is a possibility of reaction, and at the same time achieving the best possible conduction of the desulphurizing agent within the melt set in motion.
Für das Gelingen des erfindungsgemässen Verfahrens sind desweiteren verschiedene, an und für sich bekannte Vor-bedingungen zu erfüllen. So ist es beispielsweise erfor-derlich, das metallurgische Getäss ei einer basisehen Auskleidung zu versehen, vor Beginn der Behandlung abzu-schlacken, sowie dafür zu sorgen, dass die Eisenschmelze weitgehend desoxydiert, ist.For the success of the method according to the invention, various preconditions known per se must also be met. For example, it is necessary to provide the metallurgical cup with a basic lining, to remove the slag before the treatment begins, and to ensure that the molten iron is largely deoxidized.
Wesentlich ist es, dass das Entschwefelungsmittel, das vorzugsweise in Ecinörniger Form vorliegt, luttels einer Lanze in das metallurgische Gefäss in Bodennähe problemlos eingeführt werden kann.It is essential that the desulfurization agent, which is preferably in the form of ecin granules, can be easily introduced into the metallurgical vessel near the bottom using a lance.
Es ist, bekannt, zum Zweck des Einbringens von Feststoffen in einen Gasstrom eine sogenannte Zellensehleuse zu ver-wenden, die zwischen dem das Zasatzmittel enlhaltenden Vorratsbehälter und die zum Einblasen verwebdete Lanze geschaltet wird.It is known, for the purpose of introducing solids into a gas stream, to use a so-called cell truffle, which is connected between the storage container containing the additive and the lance used to blow in.
Achnlieche Schleusen, in denen das Zusatzmittel zur Er-leichterung des Eintritts in die Lanze fluidisiert wird, werden z.B. in der DAS 1.292.693 und in der DT-PS 2.303.978 beschrieben.Achniche locks in which the additive is fluidized to facilitate entry into the lance are e.g. described in DAS 1.292.693 and in DT-PS 2.303.978.
Der Nachteil der Vorrichlungen, bei denen eine Fluidi-sicrung des festen Zusatzmittels zu dessen Auflockerung und zur Erleichterung des Einbringens in die Lanze statt-findet, besteht, in der Hauptsache darin, dass Fluidisie-rungsanlagen kompliziert, störanfällieg und damit auch leuer sind, dass die gesamte Menge des einzusetzenden Zusatzmittels während der gesamten Dauer der Behandlung fluidisiert werden muss und dass die Wechselwirkung zwi-schen Fluidisierkammers und Zu- bzw. Abfuhrleitungen kom-pansicrt werden muss, was die Steuerung des Burchsat an Zusatzmittel erschwert.The disadvantage of the devices, in which the solid additive is fluidized to loosen it and to facilitate its introduction into the lance, is mainly that fluidization systems are complicated, prone to malfunction and therefore also less noisy the entire amount of the additive to be used must be fluidized during the entire duration of the treatment and that the interaction between the fluidizing chamber and the supply and discharge lines must be compensated, which makes it difficult to control the amount of additive.
Die zur Durchführung des erfindungsgemässen Verfahrens erforderliche Vorrichtung begreift im wesentlichen einen das Entschwefelungsmittel enthaltenenden und unter Argon-Druck stehenden Vorratsbehälter, der über eine Zellen ad Durchblasschleise mit einer unter Druck slehenden Arger-Zufuhrleilung und einer Argon-Feststoff-Abfuhrlei verbunden ist, welche in eine bewegliche Lanze mündetThe device required to carry out the process according to the invention essentially understands a storage container containing the desulfurizing agent and under argon pressure, which is connected via a cell ad blow-through path to a pressurized anger supply line and an argon-solid discharge line, which is connected in a movable lance opens
Die Idee, anstelle einer komplizierten Fluidisieranlage eine an und für sich bekannte Zellenrad-Durchblassecheuse zum Einbringen des Entschwefelungsmittels in den in die Lanze führenden Gasstrom zu verwenden, führt nicht, nur zu einer verbesserten metallurgischen Ausnutzung des Zusatzmittels, sondern erlaubt zusätzlich eine erheb-liche Verringerung der Anschaffungs- und Betrichskosten von Einblasvorrichtungen.The idea, instead of a complicated fluidizing system, is a well-known cellular wheel blow-through valve To use for introducing the desulfurization agent into the gas flow leading into the lance does not only lead to an improved metallurgical utilization of the additive, but additionally allows a considerable reduction in the acquisition and operating costs of blowing devices.
Die erfindungsgemässe Vorrichtung zeichnel sich zusätzlich durch ihren einfachen Aufban und ihre verminderte Slöran fälligkeit nus.The device according to the invention is additionally characterized by its simple structure and its reduced due date.
Erfindungsgemäss weist die Zellenrad-burehblassehleuse einen stugenlos regelbaren Antrieb auf. Letzterer ermög-licht eine nahezu ideale Steucrung des Durchsatzes an Entschwefelungsmittel, was einfach durch Regelung der Umdrehungsgeschwindigkeit des Zellesnrades bewerkstelligt wird, ohne dass hierbei irgendeine Veränderung der Druck-verhältnisse eintritt.According to the invention, the cellular wheel blower blower has a drive which can be regulated without problems. The latter enables an almost ideal control of the throughput of desulfurizing agent, which is simply accomplished by regulating the speed of rotation of the cell wheel without any change in the pressure conditions.
Weiter wird hierdurch eine Behandlung der Eisensehmelze durch Einblasen unter konstantem Druck ermöglicht, was bei dieser Art von Behandlung angestrebt wird.This also enables the iron melt to be treated by blowing in under constant pressure, which is the aim of this type of treatment.
Zur Erläuterung der erfindungsgemässen Vorrichtung und ihrer Betriebsweise wird anf die Zeichnungen und deren Beschreibung verwiesen. Es zeigen:
- Fig. 1 eine schematische Vorder- und Draufsicht einer bevorzugten Ausführung der Vorrichtung, und Fig. 2 zwei um 90 Grad verdrehte Schnitte durch die Zellenrad-Durch-blasschleuse.
- Fig. 1 is a schematic front and plan view of a preferred embodiment of the device, and Fig. 2 two sections rotated by 90 degrees through the cellular wheel blow-through.
In Fig. 1 erkennt man den Vorratsbehälter (I) mit dem Ein-fülltrichter (2) für das Entschwefelungsmittel und der oberen Argonzufuhr (3). Der Vorralsbehälter (1) steht über die Zellenrad-Durchblasschleuse (4) in welche die Argon-Zufuhrleitung (5) mündel , in Verbindung mit der Argon-Fests toff-Abfuhrleitung ((b), die zu der nicht gezeigten lanze führt. Ein stufenl os regelbarer Motor (8) dient zum Antreiben des Zellenrades der Durehblassebleuse (4).In Fig. 1 you can see the storage container (I) with the hopper (2) for the desulfurization agent and the upper argon feed (3). The primary container (1) is connected via the cellular wheel blow-through lock (4) into which the argon supply line (5) flows Argon solid material discharge line ((b) leading to the lance not shown. A steplessly adjustable motor (8) is used to drive the cellular wheel of the blown air blower (4).
Die in Figur 2 gezeigte Zellenrad-Durehblassehleuse (4) begreift das eigentliche Zellenrad (Z). Das in dem Vorratsbehälter (1) unter Argon gelagerte Entschwefelungsmiltel füllt in die Zellenradschleudse. Nach Drehung des Zellenrades 4) um 180° gelangt das Material in den Durchgangskanal (von wo es durch das über die Druckleitung (5) zugeführis Argon in die Leitung (6) mitgerissen und der Lanze zugaführt wird.The cellular wheel Durehblassehleuse (4) shown in Figure 2 understands the actual cellular wheel (Z). The desulfurization agent stored under argon in the storage container (1) fills the cellular wheel sluice. After rotating the cell wheel 4) by 180 °, the material enters the through-channel (from where it is entrained into the line (6) through the argon supplied via the pressure line (5) and fed to the lance.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU80692 | 1978-12-21 | ||
| LU80692A LU80692A1 (en) | 1978-12-21 | 1978-12-21 | METHOD AND DEVICE FOR DESULFURING IRON MELT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0013550A1 true EP0013550A1 (en) | 1980-07-23 |
Family
ID=19729077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP79930031A Withdrawn EP0013550A1 (en) | 1978-12-21 | 1979-12-12 | Process and apparatus for the desulphurisation of molten ferrous metals |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4347078A (en) |
| EP (1) | EP0013550A1 (en) |
| JP (1) | JPS5585613A (en) |
| LU (1) | LU80692A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0056942A2 (en) * | 1981-01-26 | 1982-08-04 | Paul Wurth S.A. | Installation for the holding and changing of immersion lances |
| EP0056944A2 (en) * | 1981-01-26 | 1982-08-04 | Paul Wurth S.A. | Installation for injecting materials into a steel melt |
| EP0061987A1 (en) * | 1981-03-23 | 1982-10-06 | Arbed S.A. | Process and apparatus for treating molten metals in the framework of metallurgical processing |
| EP0063532A1 (en) * | 1981-04-22 | 1982-10-27 | Arbed S.A. | Method and process for the instantaneous production of liquid iron |
| EP0064019A1 (en) * | 1981-04-24 | 1982-11-03 | Arbed S.A. | Process and apparatus for the desulphurisation of iron-based melts |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1408142B (en) * | ArhPd. Aciei-ies Re'unies de Burbach-Eich-Dudelange S.A., Luxemburg | 01.10. ^ 8 Belgium 571689 Device for suspending finely divided solids in a flowing carrier gas | ||
| DE1046332B (en) * | 1954-05-03 | 1958-12-11 | Union Carbide Corp | Method and device for introducing powdery substances into molten metal |
| DE1292693B (en) * | 1959-06-27 | 1969-04-17 | Metallurg D Imphy Soc | Device for injecting a powdered substance into a pain |
| DE2041307A1 (en) * | 1969-08-29 | 1971-03-11 | Rotary Hoes Ltd | Rotary feed valve for c-reducing mill scale |
| DE2326603A1 (en) * | 1972-05-25 | 1973-12-06 | Arbed | METHOD AND DEVICE FOR INTRODUCING SOLIDS INTO A METAL MELT |
| DE1508208B2 (en) * | 1966-03-30 | 1974-09-19 | Knapsack Ag, 5033 Huerth-Knapsack | Device for controlling the delivery rate of a blower |
| DE2209902B2 (en) * | 1972-03-01 | 1975-01-16 | Thyssen Niederrhein Ag Huetten- Und Walzwerke, 4200 Oberhausen | Process for the desulphurization of steel melts |
| DE2303978C2 (en) * | 1973-01-27 | 1975-03-27 | Thyssen Niederrhein Ag Huetten- Und Walzwerke, 4200 Oberhausen | Device for introducing fine-grain treatment agents into molten steel |
| DE2419070B2 (en) * | 1974-04-20 | 1976-03-04 | Thyssen Niederrhein AG Hütten- und Walzwerke, 4200 Oberhausen | METHOD FOR PRODUCING STEEL WITH INCREASED TOUGH PROPERTIES |
| DE2559188A1 (en) * | 1975-01-14 | 1976-07-15 | Inteco Int Techn Beratung | PROCESS FOR DESULFURIZATION OF STEEL MELT |
| DE2716457A1 (en) * | 1977-04-14 | 1978-11-16 | Sueddeutsche Kalkstickstoff | Desulphurisation of molten iron - where stepwise decrease in amt. of reagent used increases sulphur removal |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3929464A (en) * | 1973-08-31 | 1975-12-30 | Union Carbide Corp | Desulfurization of molten ferrous metals |
| US3955966A (en) * | 1974-03-06 | 1976-05-11 | August Thyssen-Hutte Ag | Method for dispensing a fluidizable solid from a pressure vessel |
| FR2296692A1 (en) * | 1974-12-31 | 1976-07-30 | Inst Chernoi Metallurgii | Refining pig iron in the ladle with magnesium - using particulate magnesium in a hydrocarbon gas as carrier |
| US3998625A (en) * | 1975-11-12 | 1976-12-21 | Jones & Laughlin Steel Corporation | Desulfurization method |
| JPS5919171B2 (en) * | 1977-01-26 | 1984-05-02 | 三菱重工業株式会社 | How to charge reduced iron powder into a melting furnace |
| JPS53114707A (en) * | 1977-03-09 | 1978-10-06 | Kobe Steel Ltd | Treating equipment for molten iron |
-
1978
- 1978-12-21 LU LU80692A patent/LU80692A1/en unknown
-
1979
- 1979-12-12 EP EP79930031A patent/EP0013550A1/en not_active Withdrawn
- 1979-12-21 JP JP16576879A patent/JPS5585613A/en active Pending
- 1979-12-21 US US06/106,367 patent/US4347078A/en not_active Expired - Lifetime
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1408142B (en) * | ArhPd. Aciei-ies Re'unies de Burbach-Eich-Dudelange S.A., Luxemburg | 01.10. ^ 8 Belgium 571689 Device for suspending finely divided solids in a flowing carrier gas | ||
| DE1046332B (en) * | 1954-05-03 | 1958-12-11 | Union Carbide Corp | Method and device for introducing powdery substances into molten metal |
| DE1292693B (en) * | 1959-06-27 | 1969-04-17 | Metallurg D Imphy Soc | Device for injecting a powdered substance into a pain |
| DE1508208B2 (en) * | 1966-03-30 | 1974-09-19 | Knapsack Ag, 5033 Huerth-Knapsack | Device for controlling the delivery rate of a blower |
| DE2041307A1 (en) * | 1969-08-29 | 1971-03-11 | Rotary Hoes Ltd | Rotary feed valve for c-reducing mill scale |
| DE2209902B2 (en) * | 1972-03-01 | 1975-01-16 | Thyssen Niederrhein Ag Huetten- Und Walzwerke, 4200 Oberhausen | Process for the desulphurization of steel melts |
| DE2326603A1 (en) * | 1972-05-25 | 1973-12-06 | Arbed | METHOD AND DEVICE FOR INTRODUCING SOLIDS INTO A METAL MELT |
| DE2303978C2 (en) * | 1973-01-27 | 1975-03-27 | Thyssen Niederrhein Ag Huetten- Und Walzwerke, 4200 Oberhausen | Device for introducing fine-grain treatment agents into molten steel |
| DE2419070B2 (en) * | 1974-04-20 | 1976-03-04 | Thyssen Niederrhein AG Hütten- und Walzwerke, 4200 Oberhausen | METHOD FOR PRODUCING STEEL WITH INCREASED TOUGH PROPERTIES |
| DE2559188A1 (en) * | 1975-01-14 | 1976-07-15 | Inteco Int Techn Beratung | PROCESS FOR DESULFURIZATION OF STEEL MELT |
| DE2716457A1 (en) * | 1977-04-14 | 1978-11-16 | Sueddeutsche Kalkstickstoff | Desulphurisation of molten iron - where stepwise decrease in amt. of reagent used increases sulphur removal |
Non-Patent Citations (2)
| Title |
|---|
| STAHL UND EISEN, Band 96, Nr. 20, 1976 Dusseldorf H. GRUNER et al. "Entschwefelung des Stahles in Anschluss an den Erschmelzungsprozess" Seiten 960 bis 964 * Seite 961 * * |
| STAHL UND EISEN, Band 99, Nr. 14, 16. Juli 1979 Dusseldorf H. GRUNER et al. "Metallurgische Massnahmen und Bedingungen zur Stahlentschwefelung uber das Schlackenreaktionsverfahren" Seiten 725 bis 737 * Seite 726 * * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0056942A2 (en) * | 1981-01-26 | 1982-08-04 | Paul Wurth S.A. | Installation for the holding and changing of immersion lances |
| EP0056944A2 (en) * | 1981-01-26 | 1982-08-04 | Paul Wurth S.A. | Installation for injecting materials into a steel melt |
| EP0056942A3 (en) * | 1981-01-26 | 1982-08-11 | Paul Wurth S.A. | Installation for the holding and changing of immersion lances |
| EP0056944A3 (en) * | 1981-01-26 | 1982-08-18 | Paul Wurth S.A. | Installation for injecting materials into a steel melt |
| EP0061987A1 (en) * | 1981-03-23 | 1982-10-06 | Arbed S.A. | Process and apparatus for treating molten metals in the framework of metallurgical processing |
| EP0063532A1 (en) * | 1981-04-22 | 1982-10-27 | Arbed S.A. | Method and process for the instantaneous production of liquid iron |
| EP0064019A1 (en) * | 1981-04-24 | 1982-11-03 | Arbed S.A. | Process and apparatus for the desulphurisation of iron-based melts |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5585613A (en) | 1980-06-27 |
| LU80692A1 (en) | 1980-07-21 |
| US4347078A (en) | 1982-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2440205A1 (en) | METHOD FOR REDUCING THE SULFUR CONTENT OF MOLTEN IRON | |
| DE2952434A1 (en) | METHOD AND DEVICE FOR GASIFYING SOLID, CARBONATED MATERIALS | |
| DE2650113A1 (en) | DESULFURIZATION PROCESS | |
| EP0291754B1 (en) | Process for removal of sulphur from waste gas of a reduction shaft furnace | |
| EP0530552B1 (en) | Process for desulfuration treatment of molten pig iron | |
| EP0013550A1 (en) | Process and apparatus for the desulphurisation of molten ferrous metals | |
| DE2243779C2 (en) | Process for oxygen-hydrogen refining in the manufacture of stainless steels with a high chromium content or cobalt or nickel alloys | |
| EP0038417B1 (en) | Desulfurising agent | |
| EP0582970B1 (en) | Additive for desulfurization of liquid pig and cast iron and process for desulfurizing | |
| EP1541699B1 (en) | Method for stirring steel | |
| DE2622236A1 (en) | METHOD AND DEVICE FOR ADDING SOLID, POWDERED, OR GRAINY MATERIALS IN MOLTEN METAL | |
| EP0166019B1 (en) | Method for desulfurizing pig iron | |
| EP0387580A1 (en) | Agent and method for desulfurizing molten metals | |
| DE3539164C1 (en) | Process and smelting furnace for producing non-ferrous metals | |
| DE2716457A1 (en) | Desulphurisation of molten iron - where stepwise decrease in amt. of reagent used increases sulphur removal | |
| EP0974673B1 (en) | Method for the desulfurization of molten pig iron | |
| EP0974674B1 (en) | Method for desulferization of molten pig iron | |
| DE3427435C2 (en) | ||
| DE3129398C2 (en) | Injection process for introducing solids into the steel bath of a hearth furnace, in particular for dephosphorization of the steel | |
| DE2758477C2 (en) | Process for refining pig iron while increasing the scrap content in a steel converter | |
| AT231485B (en) | Method for introducing solid additives into a reaction vessel in which iron baths are refined by means of an oxygen jet | |
| DE1433422C (en) | Process nnrl inflate crucibles for the oxygen | |
| DE3015470A1 (en) | DEVICE FOR DESULFURING MELTING METALS OUTSIDE THE OVEN | |
| DE2546647C3 (en) | Method and apparatus for dispersing a gaseous substance in a liquid medium | |
| DE3544562A1 (en) | Finely granular agent for desulphurising iron melts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): BE DE FR GB IT NL |
|
| 17P | Request for examination filed |
Effective date: 19801113 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Withdrawal date: 19810817 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: GOEDERT, JEAN |