WO1979000481A1 - Method,apparatus and means for treating melted iron with an alkali or earth alkali metal - Google Patents
Method,apparatus and means for treating melted iron with an alkali or earth alkali metal Download PDFInfo
- Publication number
- WO1979000481A1 WO1979000481A1 PCT/CH1978/000056 CH7800056W WO7900481A1 WO 1979000481 A1 WO1979000481 A1 WO 1979000481A1 CH 7800056 W CH7800056 W CH 7800056W WO 7900481 A1 WO7900481 A1 WO 7900481A1
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- WO
- WIPO (PCT)
- Prior art keywords
- hollow body
- melt
- pure
- holding member
- treatment
- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
-
- 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
-
- 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
- C21C1/10—Making spheroidal graphite cast-iron
-
- 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
-
- 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
Definitions
- the invention relates to a method for treating molten iron with a solid pure alkali or alkaline earth metal, in particular for desulfurization with pure magnesium.
- the invention also relates to a device for carrying out the method and a means for carrying it out.
- Magnesium-containing master alloys are known for treating cast iron melts.
- the high manufacturing costs of these master alloys and the limited application have proven to be disadvantageous here, since other undesirable substances contained in the master alloys also get into the melt with the Mg.
- DE-AS 18 15 214 a tiltable treatment vessel with a fixed chamber for pure magnesium is known.
- the chamber is aerodynamically arranged and prevents the magnesium from floating.
- the tilting device is complex and encapsulation after the treatment is necessary, which is associated with loss of time and temperature.
- reaction products have to be removed from the chamber.
- DE-AS 22 089 60 shows a special container with a heavy-duty hollow body attached to a cover with hydraulic cylinders.
- the hollow body is designed as a diving bulb.
- the thermal shock of the immersion bulb when immersed is particularly disadvantageous, which is detrimental to the service life. A longer delay time must also be accepted due to the heat absorption of the immersion bulb.
- the melt cools down, so that there is a risk of the openings in the immersion bulb freezing.
- the positioning and lowering of the immersion bulb leads to waiting times and temperature losses, because the melt must first be in the treatment vessel. Cleaning the diving bulb is also cumbersome and time-consuming.
- the central position of the diving pear is also unfavorable for flow, which leads to an increased Mg consumption.
- the object of the present invention is to avoid the disadvantages mentioned at the outset and to propose an economical method and device.
- the hollow body can be produced relatively thinly and inexpensively through the single use and through a wire mesh reinforcement or a fiber reinforcement. There is no need to clean the hollow body and also to pour the treated melt into a transport pan. Temperature losses of the Melting by absorption is minimal and the openings in the hollow body cannot freeze. The pouring takes place when all other preparations have already been made so that the melt can be poured without loss of temperature and without waiting times. The actual casting can also take place within a very short time. Any conventional ladle can be used as a treatment vessel without any modification.
- FIG. 1 shows an arrangement according to the invention, partly in vertical section
- Fig. 2 shows a hollow body according to Fig. 1, and
- Fig. 3 shows another embodiment of the hollow body.
- a cylindrical hollow body 1 shown in FIG. 2 made of a phosphate-bonded mass hardened under 400 C and reinforced with a wire mesh reinforcement 2 is partially filled with lumpy magnesium 3 and has a bolt 7 at its flat, upper end and a nut 8 at its lower end on.
- a fiber reinforcement instead of a wire mesh reinforcement 2 ' serves the same purpose.
- the wall thickness of the body 1 can be reduced.
- the hollow bodies 1 are standardized in sizes of, for example, 10, 20 or 30 liters and are closed and already delivered with a certain amount of Mg, the lower and upper openings 9 and 10 being drilled in place shortly before use. In this way, an optimal adaptation to the metallurgical conditions is achieved.
- a hollow body 1 with a volume of 20 L contains, for example, about 12 kg of Mg, which corresponds to a volume ratio of pure metal / hollow body of about 0.8. This ratio is optimal because, at higher values, the wall thickness of the hollow body must be significantly thicker because of the risk of premature destruction of the hollow body by excessive vapor formation. Only a single, lateral opening 9 can be provided in the lower region of the hollow body 1. The total passage area of the opening or openings 9 is expediently-
- the hollow body 1 is screwed with the bolt 7 into a holding element in the form of a holding rod 15 made of metal (welding is also possible) and is in position near the bottom of a treatment vessel of a normal ladle 16.
- the hollow body 1 can also be fastened to a stopper rod or to a fastening rod which is guided through the base spout of the pan. It is also possible to arrange several hollow bodies one below the other (FIG. 3) or next to one another. For fluidic reasons, however, they should not be central, but sideways;
- the support rod 15 with a refractory protective tube 18 made of, for example, croning sand is connected via a boom 19 to a hydraulic and pneumatic device 20 that can be raised and lowered.
- the device 20 can also be rotated according to the arrow 21, so that a second hollow body 1, which is in the ready position, is connected to a second holding rod 25 and a second arm 26 in the case of a subsequent one . Treatment can be quickly positioned.
- the support rod 15 can also be supported for the sake of simplicity by means of a non-drawn cross member on the edge of the pan.
- the pan 16 is filled with a pig iron to be treated from a tapping pan 29 to approximately half its height 30. At 40 t pig iron lasts after about 30 seconds. Ensuing reaction about 120 "seconds.
- the duration of the delay Vars ⁇ of the opening can be determined by the diameter 9 controls ge, and preferably is 2 '5 to 30 sec., So that the treatment ladle
- the bath level 33 should be at least about 50 cm above the highest elevations of the hollow body at a height of 30, since otherwise the removal will be insufficient
- the wall of the pan forms a splash guard, which makes it possible for the process to be carried out without a lid will, and after that, with the same
- the hollow bodies 35 can also be designed in the shape of a truncated cone with the truncated cone base mounted upwards.
- the upper openings 39 can be aligned vertically.
- the truncated cone base can also be designed as an upper cover which is fastened in the form of a chamotte pin after the hollow body has been filled with magnesium.
- the chamotte pin can be designed as a connecting piece between the hollow body 1 and a fastening rod or a stopper rod.
- the amount of slag is low since only small amounts of pure magnesium are added.
- the iron losses in the slag and the iron losses when slagging are low.
- the two-stage process reduces the loss of injection iron compared to the one-stage process.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
Verfahren, Vorrichtung und Mittel zum Behandeln von Eisen¬ schmelzen mit einem festen Reinalkali- oder Erdalkali¬ metallMethod, device and means for treating iron melts with a solid pure alkali or alkaline earth metal
Die Erfindung betrifft ein Verfahren zum Behandeln von Eisenschmelzen mit einem festen Reinalkali- oder Erdalkali¬ metall, insbesondere zur Entschwefelung mit Reinmagnesium. Die Erfindung betrifft ebenfalls eine Vorrichtung zur Durchführung des Verfahrens und ein Mittel zu dessen Aus¬ führung.The invention relates to a method for treating molten iron with a solid pure alkali or alkaline earth metal, in particular for desulfurization with pure magnesium. The invention also relates to a device for carrying out the method and a means for carrying it out.
Zum Behandeln von Gusseisenschmelzen sind Magnesium-haltige Vorlegierungen bekannt. Als nachteilig erweisen sich hier¬ bei die hohen Herstellungskosten dieser Vorlegierungen und die eingeschränkte Anwendungsmöglichkeit, da mit dem Mg auch andere, in den Vorlegierungen enthaltene, unerwünschte Stoffe in die Schmelze gelangen. Beispielsweise aus der DE-AS 18 15 214 ist ein kippbares Behandlungsgefäss mit einer festangeordneten Kammer für reines Magnesium bekannt. Die Kammer ist strömungsgünstig angeordnet und verhindert ein Aufschwimmen des Magnesiums. Jedoch ist die Kippvor¬ richtung aufwendig und ein Umgiessen nach der Behandlung ist notwendig, was mit Zeit- und Temperaturverlusten ver¬ bunden ist. Des weiteren müssen Reaktionsprodukte aus der Kammer entfernt werden.Magnesium-containing master alloys are known for treating cast iron melts. The high manufacturing costs of these master alloys and the limited application have proven to be disadvantageous here, since other undesirable substances contained in the master alloys also get into the melt with the Mg. For example, from DE-AS 18 15 214 a tiltable treatment vessel with a fixed chamber for pure magnesium is known. The chamber is aerodynamically arranged and prevents the magnesium from floating. However, the tilting device is complex and encapsulation after the treatment is necessary, which is associated with loss of time and temperature. Furthermore, reaction products have to be removed from the chamber.
Die DE-AS 22 089 60 zeigt einen Spezialbehälter mit einem an einem Deckel mit Hydrozylindern befestigten Hohlkörper in schwerer Ausführung. Der Hohlkörper ist als Tauchbirne gestaltet. Besonders nachteilig ist der Wärmeschock der Tauchbirne beim Eintauchen, was der Standzeit abträglich ist. Auch eine grδssere Verzδgerungszeit muss in Kauf ge¬ nommen werden, bedingt durch die Wärmeabsorption der Tauchbirne. Dadurch kühlt die Schmelze ab, so dass die Gefahr eines Einfrierens der Oeffnungen in der Tauchbir¬ ne gegeben ist. Das Instellungbringen und der Absenkvor¬ gang der Tauchbirne führt zu Wartezeiten und Temperatur¬ verlusten, weil sich zuerst die Schmelze im Behandlungs- gefäss befinden muss. Auch eine Reinigung der Tauchbirne ist umständlich und zeitraubend. Die zentrale Lage der Tauchbirne ist zudem strömungsungünstig, was zu einem vermehrten Mg- Verbrauch führt.DE-AS 22 089 60 shows a special container with a heavy-duty hollow body attached to a cover with hydraulic cylinders. The hollow body is designed as a diving bulb. The thermal shock of the immersion bulb when immersed is particularly disadvantageous, which is detrimental to the service life. A longer delay time must also be accepted due to the heat absorption of the immersion bulb. As a result, the melt cools down, so that there is a risk of the openings in the immersion bulb freezing. The positioning and lowering of the immersion bulb leads to waiting times and temperature losses, because the melt must first be in the treatment vessel. Cleaning the diving bulb is also cumbersome and time-consuming. The central position of the diving pear is also unfavorable for flow, which leads to an increased Mg consumption.
Aufgabe der vorliegenden Erfindung ist es, die eingangs genannten Nachteile zu vermeiden und eine wirtschaftliche Methode und Vorrichtung vorzuschlagen.The object of the present invention is to avoid the disadvantages mentioned at the outset and to propose an economical method and device.
Die Aufgabe wird erfindungsgemäss gelöst durch die kenn¬ zeichnenden Merkmale der Ansprüche 1, 4 und 11.The object is achieved according to the invention by the characterizing features of claims 1, 4 and 11.
Beim erfindungsgemässen Verfahren kann der Hohlkörper durch den einmaligen Gebrauch und durch eine Maschen¬ drahtarmierung oder eine Faserverstärkung relativ dünn und billig hergestellt werden. Eine Reinigung des Hohl¬ körpers und auch ein Umgiessen der behandelten Schmelze in eine Transportpfanne entfällt. Temperaturverluste der Schmelze durch Absorotion sind minim und ein Einfrieren der Oeffnungen im Hohlkörper kann nicht stattfinden. Das Uebergiessen geschieht wenn alle anderen Vorbereitungen bereits getroffen worden sind, so dass die Schmelze ohne Temperaturverluste und ohne Wartezeiten vergossen werden kann. Auch das eigentliche Giessen kann innert kürzester' Zeit geschehen. Als Behandlungsgefäss kann jede herkömmli¬ che Giesspfanne ohne irgendwelchen Umbau verwendet werden.In the method according to the invention, the hollow body can be produced relatively thinly and inexpensively through the single use and through a wire mesh reinforcement or a fiber reinforcement. There is no need to clean the hollow body and also to pour the treated melt into a transport pan. Temperature losses of the Melting by absorption is minimal and the openings in the hollow body cannot freeze. The pouring takes place when all other preparations have already been made so that the melt can be poured without loss of temperature and without waiting times. The actual casting can also take place within a very short time. Any conventional ladle can be used as a treatment vessel without any modification.
Weitere erfindungsgemässe Merkmale und vorteilhafte Ausge¬ staltungen der Erfindung ergeben sich aus den weiteren Ansprüchen.Further features according to the invention and advantageous embodiments of the invention result from the further claims.
Die Erfindung wird nachfolgend anhand eines in der Zeich¬ nung dargestellten Beispieles näher erläutert. Es zeigen:The invention is explained in more detail below on the basis of an example shown in the drawing. Show it:
Fig. 1 eine erfindungsgemässe Anordnung, teilweise im Vertikalschnitt,1 shows an arrangement according to the invention, partly in vertical section,
Fig. 2 einen Hohlkörper nach Fig. 1, undFig. 2 shows a hollow body according to Fig. 1, and
Fig. 3 eine andere Ausführung des Hohlkörpers.Fig. 3 shows another embodiment of the hollow body.
Ein in Fig. 2 dargestellter, zylindrischer Hohlkörper 1 aus einer unter 400 C ausgehärteten phosphatgebundenen, mit einer Maschendrahtarmierung 2 verstärkten Masse ist mit stückigem Magnesium 3 teilweise gefüllt und weist an seinem flachen, oberen Ende einen Bolzen 7 und an seinem unteren Ende eine Mutter 8 auf. Eine Faserverstärkung statt einer Maschendrahtarmierung 2 'dient demselben Zweck. Durch die Verwendung von der Armierung 2 kann die Wanddicke der Körper 1 herabgesetzt werden. Die Hohlkörper 1 sind standardisiert in Grossen von beispielsweise 10, 20 oder 30 Liter und werden geschlossen und bereits mit einer be¬ stimmten Menge Mg angeliefert, wobei die unteren und oberen Oeffnungen 9 bzw. 10 an Ort und Stelle kurz vor Gebrauch gebohrt werden. Dadurch wird eine optimale An¬ passung an die metallurgischen Gegebenheiten erreicht. Die Grosse der Löcher hängt u.a. ab von der Ausgangs¬ temperatur, von der chemischen Zusammensetzung und von der gewünschten Reaktionsverzögerung. Auch das nicht un¬ gefährliche Lagern von Mg-Brocken alleine entfällt. Ein Hohlkörper 1 mit einem Volumen von 20 L enthält beispiels¬ weise etwa 12 kg Mg, was einem Volumenverhältnis Rein¬ metall/Hohlkörper von etwa 0,8 entspricht. Dieses Ver¬ hältnis ist optimal, weil bei höheren Werten die Wand¬ dicken des Hohlkörpers wegen der Gefahr einer durch über- ässige Dampfbildung vorzeitigen Zerstörung des Hohl¬ körpers bedeutend dicker sein müssen. Im unteren Bereich des Hohlkörpers 1 kann lediglich eine einzige, seitliche Oeffnung 9 vorgesehen sein. Die Gesamtdurchtrittsflache der Oeffnung oder der Oeffnungen 9 beträgt zweck ässiger-A cylindrical hollow body 1 shown in FIG. 2 made of a phosphate-bonded mass hardened under 400 C and reinforced with a wire mesh reinforcement 2 is partially filled with lumpy magnesium 3 and has a bolt 7 at its flat, upper end and a nut 8 at its lower end on. A fiber reinforcement instead of a wire mesh reinforcement 2 ' serves the same purpose. By using the reinforcement 2, the wall thickness of the body 1 can be reduced. The hollow bodies 1 are standardized in sizes of, for example, 10, 20 or 30 liters and are closed and already delivered with a certain amount of Mg, the lower and upper openings 9 and 10 being drilled in place shortly before use. In this way, an optimal adaptation to the metallurgical conditions is achieved. The size of the holes depends, inter alia, on the starting temperature, on the chemical composition and on the desired reaction delay. Even the not dangerous storage of chunks of Mg is no longer necessary. A hollow body 1 with a volume of 20 L contains, for example, about 12 kg of Mg, which corresponds to a volume ratio of pure metal / hollow body of about 0.8. This ratio is optimal because, at higher values, the wall thickness of the hollow body must be significantly thicker because of the risk of premature destruction of the hollow body by excessive vapor formation. Only a single, lateral opening 9 can be provided in the lower region of the hollow body 1. The total passage area of the opening or openings 9 is expediently-
2 weise 42 mm pro kg Mg und der Durchmesser liegt im Be¬ reich von etwa 12 bis 30 mm. Im oberen Bereich des Hohl¬ körpers 1 sind vorzugsweise etwa 4 Oeffnungen 10 vorge¬ sehen.2 or 42 mm per kg of Mg and the diameter is in the range of about 12 to 30 mm. In the upper region of the hollow body 1, approximately 4 openings 10 are preferably provided.
Der Hohlkörper 1 ist mit dem Bolzen 7 in ein Halteorgan in Form einer Haltestange 15 aus Metall geschraubt (auch ein Anschweissen ist möglich) und befindet sich in Boden¬ nähe eines Behandlungsgefässes einer normalen Giesspfanne 16 in Stellung. Der Hohlkörper 1 kann auch an einer Stop¬ fenstange oder an einer durch den Bodenausguss der Pfanne geführten Befestigungsstange befestigt werden. Ebenfalls ist es möglich, mehrere Hohlkörper untereinander (Fig. 3) oder nebeneinander anzuordnen. Sie sollten sich aber aus strömungstechnischen Gründen nicht zentral,sondern seit-;The hollow body 1 is screwed with the bolt 7 into a holding element in the form of a holding rod 15 made of metal (welding is also possible) and is in position near the bottom of a treatment vessel of a normal ladle 16. The hollow body 1 can also be fastened to a stopper rod or to a fastening rod which is guided through the base spout of the pan. It is also possible to arrange several hollow bodies one below the other (FIG. 3) or next to one another. For fluidic reasons, however, they should not be central, but sideways;
BU OBU O
\ WI\ WI
'RN lieh in der vertikalen Längsachse der Pfanne 16 befinden, so dass ein hohes Mg-Ausbringen ermöglicht wird. Aus diesem Grunde sollten sich die Oeffnungen 9, 10 auch nicht zu nah an der Pfannenwand befinden. ' RN borrowed in the vertical longitudinal axis of the pan 16, so that a high Mg output is possible. For this reason, the openings 9, 10 should not be too close to the pan wall.
Die Haltestange 15 mit einem feuerfesten Schutzrohr 18 aus beispielsweise Croning-Sand ist über einen Ausleger 19 mit einer heb- und senkbaren, hydraulischen oder pneumatischen Einrichtung 20 verbunden. Die Einrichtung 20 ist gemäss dem Pfeil 21 auch drehbar, so dass ein zweiter, in Be¬ reitschaftsstellung sich befindlicher Hohlkörper 1 an einer zweiten Haltestange 25 und einem zweiten Ausleger 26 bei einer nachfolgenden . Behandlung schnell in Stellung gebracht werden kann. Die Haltestange 15 kann sich aber auch einfachheitshalber mittels einer nichtgezeichneten Traverse auf den Pfannenrand abstützen.The support rod 15 with a refractory protective tube 18 made of, for example, croning sand is connected via a boom 19 to a hydraulic and pneumatic device 20 that can be raised and lowered. The device 20 can also be rotated according to the arrow 21, so that a second hollow body 1, which is in the ready position, is connected to a second holding rod 25 and a second arm 26 in the case of a subsequent one . Treatment can be quickly positioned. The support rod 15 can also be supported for the sake of simplicity by means of a non-drawn cross member on the edge of the pan.
Die Pfanne 16 wird mit einer zu behandelnden Roheisen¬ schmelze aus einer Abstichpfanne 29 etwa zur halben Höhe 30 gefüllt. Bei 40 t Roheisen dauert die nach ca. 30 Sek. einsetzende Reaktion etwa 120 "Sek. Die Dauer der Reaktions¬ verzögerung kann durch den Durchmesser der Oeffnung 9 ge¬ steuert werden und beträgt vorzugsweise 2'5 bis 30 Sek., damit die Behandlungspfanne, ohne Mg-Verluste durch vor¬ zeitiges Einsetzen der Reaktion mit Schmelze gefüllt wer¬ den kann. Der Badspiegel 33 sollte sich bei der Höhe 30 mindestens etwa 50 cm über die höchsten Erhebungen des Hohlkörpers befinden, da sonst das Ausbringen ungenügend wird. Die obere Pfannenwand bildet einen Spritzschutz. Da¬ durch ist es möglich, dass das Verfahren ohne Deckel durch¬ geführt werden kann. Eventuell kann eine Absaughaube für Staub bzw. Dämpfe vorgesehen werden. Bei der Höhe 30 wird die Reaktionszeit abgewartet, wobei die Schmelze überbe¬ handelt wird, und danach wird mit derselbenThe pan 16 is filled with a pig iron to be treated from a tapping pan 29 to approximately half its height 30. At 40 t pig iron lasts after about 30 seconds. Ensuing reaction about 120 "seconds. The duration of the delay Reaktions¬ of the opening can be determined by the diameter 9 controls ge, and preferably is 2 '5 to 30 sec., So that the treatment ladle The bath level 33 should be at least about 50 cm above the highest elevations of the hollow body at a height of 30, since otherwise the removal will be insufficient The wall of the pan forms a splash guard, which makes it possible for the process to be carried out without a lid will, and after that, with the same
Schmelze aus der Pfanne 29 bis zu der maximalen Badspie¬ gelhöhe 31 nachgefüllt, so dass durch die Verdünnung die endgültige Zusammensetzung erreicht wird. Durch das mehr oder weniger Nachfüllen kann auch mit den standardisier¬ ten Mg-Mengen der gewünschte Schwefelgehalt erreicht werden. Refill the melt from the pan 29 up to the maximum bath level 31 so that the final composition is achieved by the dilution. Due to the more or less refilling, the desired sulfur content can also be achieved with the standardized amounts of Mg.
Auch können die Hohlkörper 35 kegelstumpfförmig mit nach oben montierter Kegelstumpfbasis ausgebildet sein. Die oberen Oeffnungen 39 können vertikal ausgerichtet sein. Auch kann die Kegelstumpfbasis als oberer Deckel ausge¬ bildet sein, der in Form eines Schamottezapfens nach dem Füllen des Hohlkörpers mit Magnesium befestigt wird. Der Schamottezapfen kann als Verbindungsstück zwischen Hohl¬ körper 1 und einer Befestigungsstange oder einer Stopfen¬ stange ausgebildet sein.The hollow bodies 35 can also be designed in the shape of a truncated cone with the truncated cone base mounted upwards. The upper openings 39 can be aligned vertically. The truncated cone base can also be designed as an upper cover which is fastened in the form of a chamotte pin after the hollow body has been filled with magnesium. The chamotte pin can be designed as a connecting piece between the hollow body 1 and a fastening rod or a stopper rod.
Mit dem erfindungsgemässen Verfahren sind allgemein fol¬ gende Vorteile erzielbar:The following advantages can generally be achieved with the method according to the invention:
- Auch bei hohem Ausgangsschwefelgehalt lässt sich eine treffsichere Entschwefelung auf weniger als 0,01 % S erzielen.- Even with a high starting sulfur content, accurate desulfurization can be achieved to less than 0.01% S.
- Dadurch,dass der Formkörper nur einmal verwendet wird, ergibt sich eine einfache Handhabung.- The fact that the molded body is used only once results in easy handling.
Der Schlackenanfall ist gering, da nur geringe Rein¬ magnesiummengen zugegeben werden.The amount of slag is low since only small amounts of pure magnesium are added.
Die Eisenverluste in der Schlacke und die Eisenver¬ luste beim Abschlacken sind gering.The iron losses in the slag and the iron losses when slagging are low.
Es lässt sich in den Stofffluss des Stahlwerkes inte- grieren und erlaubt die schnell aufeinanderfolgend-* "It can be integrated into the material flow of the steelworks and allows the quick successive- * "
OM W1 # A Behandlung von Eisenmengen auch über 50 Tonnen ohne lange Wartezeiten und damit ohne entsprechend hohe Temperaturverluste, d.h. ohne Störung des Betriebsab¬ laufes .OM W1 # A Treatment of iron quantities even over 50 tons without long waiting times and thus without correspondingly high temperature losses, ie without disturbing the operational sequence.
Durch eine exotherme Reaktion ergibt sich, z.B. im Ver¬ gleich zur Soda-Entschwefelung, ein geringerer Tempe¬ raturverlust.An exothermic reaction results e.g. in comparison to soda desulfurization, a lower temperature loss.
Durch das zweistufige Verfahren (Ueberbehandlung/Ver- dünnung) werden die Spritzeisenverluste im Vergleich zu einstufigen Verfahren vermindert.The two-stage process (overtreatment / thinning) reduces the loss of injection iron compared to the one-stage process.
Wie Versuche zeigten, kann bei Schwefel-Anfangsgehalten von über 0,08 % ein Magnesiumausbringen von 100 % er¬ reicht werden undAs experiments have shown, a magnesium yield of 100% can be achieved with an initial sulfur content of over 0.08%
pro Tonne Schmelze werden lediglich 0,3 bis 0,8 kg Mg benötigt, was zu einer geringeren Staubentwicklung führt.only 0.3 to 0.8 kg of Mg are required per ton of melt, which leads to less dust.
OMPI ,fa WIPO &RNAl\ _ OMPI, fa WIPO & RNAl \ _
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH132/78 | 1978-01-06 | ||
| CH13278A CH638242A5 (en) | 1978-01-06 | 1978-01-06 | METHOD FOR DESULFURING LARGE QUANTITIES OF MELTING IRON, STEEL OR CAST IRON. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1979000481A1 true WO1979000481A1 (en) | 1979-07-26 |
Family
ID=4179976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CH1978/000056 Ceased WO1979000481A1 (en) | 1978-01-06 | 1978-12-27 | Method,apparatus and means for treating melted iron with an alkali or earth alkali metal |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0003037A1 (en) |
| CA (1) | CA1119413A (en) |
| CH (1) | CH638242A5 (en) |
| WO (1) | WO1979000481A1 (en) |
| ZA (1) | ZA7949B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1982003875A1 (en) * | 1981-05-08 | 1982-11-11 | Lustenberger Hans | Immersion and vaporization chamber |
| EP0309781A1 (en) * | 1987-09-24 | 1989-04-05 | Zavody Tezkeho Strojirenstvi Kombinat Kombinatni Podnik | Process for adding fusibles and evaporable additives to molten iron alloys, and installation for its realization |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3021707A1 (en) * | 1980-06-10 | 1981-12-17 | Klöckner-Humboldt-Deutz AG, 5000 Köln | DEVICE FOR IMPORTING HIGHLY REACTIVE ADDITIVES INTO A METAL MELT |
| FR2493873B1 (en) * | 1980-11-07 | 1986-03-28 | Dunn Jr Edward | PROCESS FOR CLEANING STEEL IN CAST POCKET |
| US5871687A (en) * | 1997-08-04 | 1999-02-16 | Insul Company, Inc. | Consumable recharging box |
| CN107326146B (en) * | 2017-07-08 | 2019-05-17 | 上海艾诺特殊钢铸造有限公司 | The method of a small amount of low-density volatile metal is introduced into small-sized molten steel furnace |
| CN107460275B (en) * | 2017-08-18 | 2019-05-03 | 启东市聚旺铸造有限公司 | Method for adding small amount of low-density volatile metal into molten steel |
| CN107419058B (en) * | 2017-08-18 | 2019-06-07 | 陕西中钒昌盛新材料科技有限公司 | The method of a small amount of low-density volatile metal is added in molten steel |
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| US1869925A (en) * | 1930-09-24 | 1932-08-02 | Hugh C Sicard | Article for introducing materials in a metallurgical bath |
| DE1021395B (en) * | 1952-06-17 | 1957-12-27 | Metallgesellschaft Ag | Process for the production of spheroidal graphite cast iron |
| CH331292A (en) * | 1952-10-27 | 1958-07-15 | Mond Nickel Co Ltd | Process for the production of cast iron |
| GB874181A (en) * | 1958-10-28 | 1961-08-02 | Mannesmann Ag | Method and apparatus for the addition of deoxidising and alloying elements to molten metal baths |
| DE1939246A1 (en) * | 1969-08-01 | 1971-02-11 | Koerver & Nehring Gmbh Maschin | Reaction vessel for the prep of spheroidal - cast iron |
| DE2331052A1 (en) * | 1972-06-21 | 1974-01-10 | Foseco Int | DEVICE FOR THE INTRODUCTION OF LOW SOLID SOLIDS INTO MOLTEN METAL |
| US3934862A (en) * | 1973-04-12 | 1976-01-27 | Labate Michael D | Device for supplying a treating agent to molten metal in a ladle |
| US3942775A (en) * | 1973-04-02 | 1976-03-09 | Labate Michael D | Submerged desulphurization device and method |
| DE2533246A1 (en) * | 1975-07-25 | 1977-02-10 | Metallgesellschaft Ag | Spheroidal graphite cast iron prodn. - using submerged magnesium packed in graphite or carbon fibre fabric or web |
| FR2328050A1 (en) * | 1975-10-15 | 1977-05-13 | Foseco Trading Ag | SUPPORT BLOCK FOR THE INTRODUCTION OF REAGENTS IN MELTED METALS |
| US4060407A (en) * | 1975-08-25 | 1977-11-29 | Reactive Metals & Alloys Corporation | Methods and apparatus for adding mischmetal to molten steel |
| FR2377452A1 (en) * | 1977-01-18 | 1978-08-11 | Canron Ltd | METHOD AND APPARATUS FOR PROCESSING A FUSION METAL |
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| DE2558072C3 (en) * | 1975-12-22 | 1978-09-21 | Micheal Donald Ellwood City Pa. Labate (V.St.A.) | Method and device for introducing desulphurizing or alloying additives below the metal bath level |
| DD128912A5 (en) * | 1977-03-23 | 1977-12-14 | Foseco Trading Ag | TRAKERKOERPER FOR SUPPLEMENTS TO METAL MELTS |
-
1978
- 1978-01-06 CH CH13278A patent/CH638242A5/en not_active IP Right Cessation
- 1978-12-21 EP EP78101809A patent/EP0003037A1/en not_active Ceased
- 1978-12-27 WO PCT/CH1978/000056 patent/WO1979000481A1/en not_active Ceased
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1979
- 1979-01-05 ZA ZA7949A patent/ZA7949B/en unknown
- 1979-01-08 CA CA000319252A patent/CA1119413A/en not_active Expired
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|---|---|---|---|---|
| US1869925A (en) * | 1930-09-24 | 1932-08-02 | Hugh C Sicard | Article for introducing materials in a metallurgical bath |
| DE1021395B (en) * | 1952-06-17 | 1957-12-27 | Metallgesellschaft Ag | Process for the production of spheroidal graphite cast iron |
| CH331292A (en) * | 1952-10-27 | 1958-07-15 | Mond Nickel Co Ltd | Process for the production of cast iron |
| GB874181A (en) * | 1958-10-28 | 1961-08-02 | Mannesmann Ag | Method and apparatus for the addition of deoxidising and alloying elements to molten metal baths |
| DE1939246A1 (en) * | 1969-08-01 | 1971-02-11 | Koerver & Nehring Gmbh Maschin | Reaction vessel for the prep of spheroidal - cast iron |
| DE2331052A1 (en) * | 1972-06-21 | 1974-01-10 | Foseco Int | DEVICE FOR THE INTRODUCTION OF LOW SOLID SOLIDS INTO MOLTEN METAL |
| US3942775A (en) * | 1973-04-02 | 1976-03-09 | Labate Michael D | Submerged desulphurization device and method |
| US3934862A (en) * | 1973-04-12 | 1976-01-27 | Labate Michael D | Device for supplying a treating agent to molten metal in a ladle |
| DE2533246A1 (en) * | 1975-07-25 | 1977-02-10 | Metallgesellschaft Ag | Spheroidal graphite cast iron prodn. - using submerged magnesium packed in graphite or carbon fibre fabric or web |
| US4060407A (en) * | 1975-08-25 | 1977-11-29 | Reactive Metals & Alloys Corporation | Methods and apparatus for adding mischmetal to molten steel |
| FR2328050A1 (en) * | 1975-10-15 | 1977-05-13 | Foseco Trading Ag | SUPPORT BLOCK FOR THE INTRODUCTION OF REAGENTS IN MELTED METALS |
| FR2377452A1 (en) * | 1977-01-18 | 1978-08-11 | Canron Ltd | METHOD AND APPARATUS FOR PROCESSING A FUSION METAL |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1982003875A1 (en) * | 1981-05-08 | 1982-11-11 | Lustenberger Hans | Immersion and vaporization chamber |
| US4496393A (en) * | 1981-05-08 | 1985-01-29 | George Fischer Limited | Immersion and vaporization chamber |
| EP0309781A1 (en) * | 1987-09-24 | 1989-04-05 | Zavody Tezkeho Strojirenstvi Kombinat Kombinatni Podnik | Process for adding fusibles and evaporable additives to molten iron alloys, and installation for its realization |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA7949B (en) | 1980-01-30 |
| EP0003037A1 (en) | 1979-07-25 |
| CH638242A5 (en) | 1983-09-15 |
| CA1119413A (en) | 1982-03-09 |
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