WO1979000481A1 - Procede, dispositif et moyen pour le traitement de fer en fusion avec un metal alcalin ou un metal alcalino-terreux - Google Patents

Procede, dispositif et moyen pour le traitement de fer en fusion avec un metal alcalin ou un metal alcalino-terreux Download PDF

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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
Authority
WO
WIPO (PCT)
Prior art keywords
hollow body
melt
pure
holding member
treatment
Prior art date
Application number
PCT/CH1978/000056
Other languages
German (de)
English (en)
Inventor
K Hornung
Original Assignee
Fischer Ag
K Hornung
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fischer Ag, K Hornung filed Critical Fischer Ag
Publication of WO1979000481A1 publication Critical patent/WO1979000481A1/fr

Links

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.

Landscapes

  • 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

Le procede pour la desulfurisation de fer en fusion prevoit que des corps creux (1) standardises, incombustibles et contenant des morceaux de Mg, livres fermes de tous cotes et dans lesquels des ouvertures (9, 10) sont faites juste avant l'emploi, sont tenus par un organe (15) au voisinage du fond d'une cuve de coulage (16) classique, qu'ensuite les corps creux sont recouverts par la matiere en fusion et que de ce fait la fusion soit surtraitee et diluee a la concentration voulue apres ce traitement. Le corps creux detruit est charrie en surface par la fusion.
PCT/CH1978/000056 1978-01-06 1978-12-27 Procede, dispositif et moyen pour le traitement de fer en fusion avec un metal alcalin ou un metal alcalino-terreux WO1979000481A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH13278A CH638242A5 (de) 1978-01-06 1978-01-06 Verfahren zur entschwefelung von groesseren mengen roheisen-, stahl- oder gusseisen-schmelzen.
CH132/78 1978-01-06

Publications (1)

Publication Number Publication Date
WO1979000481A1 true WO1979000481A1 (fr) 1979-07-26

Family

ID=4179976

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH1978/000056 WO1979000481A1 (fr) 1978-01-06 1978-12-27 Procede, dispositif et moyen pour le traitement de fer en fusion avec un metal alcalin ou un metal alcalino-terreux

Country Status (5)

Country Link
EP (1) EP0003037A1 (fr)
CA (1) CA1119413A (fr)
CH (1) CH638242A5 (fr)
WO (1) WO1979000481A1 (fr)
ZA (1) ZA7949B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982003875A1 (fr) * 1981-05-08 1982-11-11 Lustenberger Hans Chambre d'immersion et de vaporisation
EP0309781A1 (fr) * 1987-09-24 1989-04-05 Zavody Tezkeho Strojirenstvi Kombinat Kombinatni Podnik Procédé pour ajouter des additifs volatils et fusibles dans des alliages ferreux fondus et dispositif pour sa réalisation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3021707A1 (de) * 1980-06-10 1981-12-17 Klöckner-Humboldt-Deutz AG, 5000 Köln Vorrichtung zum einfuehren stark reagierender zusaetze in eine metallschmelze
FR2493873B1 (fr) * 1980-11-07 1986-03-28 Dunn Jr Edward Procede d'epuration de l'acier en poche de coulee
US5871687A (en) * 1997-08-04 1999-02-16 Insul Company, Inc. Consumable recharging box
CN107326146B (zh) * 2017-07-08 2019-05-17 上海艾诺特殊钢铸造有限公司 向小型钢水熔炼炉中引入少量低密度挥发性金属的方法
CN107419058B (zh) * 2017-08-18 2019-06-07 陕西中钒昌盛新材料科技有限公司 钢水中添加少量低密度挥发性金属的方法
CN107460275B (zh) * 2017-08-18 2019-05-03 启东市聚旺铸造有限公司 钢水中加入少量低密度挥发性金属的方法

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1869925A (en) * 1930-09-24 1932-08-02 Hugh C Sicard Article for introducing materials in a metallurgical bath
DE1021395B (de) * 1952-06-17 1957-12-27 Metallgesellschaft Ag Verfahren zur Herstellung von Gusseisen mit Kugelgraphit
CH331292A (de) * 1952-10-27 1958-07-15 Mond Nickel Co Ltd Verfahren zur Herstellung von Gusseisen
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 (de) * 1969-08-01 1971-02-11 Koerver & Nehring Gmbh Maschin Vorrichtung zur Behandlung,wie z.B. durch Begasung,zum Reinigen von Metallschmelzen,insbesondere zum Herstellen von Gusseisen mit Kugelgraphit
DE2331052A1 (de) * 1972-06-21 1974-01-10 Foseco Int Vorrichtung zur einfuehrung von niedrigsiedenden feststoffen in geschmolzenes metall
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 (de) * 1975-07-25 1977-02-10 Metallgesellschaft Ag Verfahren zur herstellung von gusseisen mit kugelgraphit
FR2328050A1 (fr) * 1975-10-15 1977-05-13 Foseco Trading Ag Bloc support pour l'introduction de reactifs dans des metaux fondus
US4060407A (en) * 1975-08-25 1977-11-29 Reactive Metals & Alloys Corporation Methods and apparatus for adding mischmetal to molten steel
FR2377452A1 (fr) * 1977-01-18 1978-08-11 Canron Ltd Procede et appareil pour traiter un metal en fusion

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2558072C3 (de) * 1975-12-22 1978-09-21 Micheal Donald Ellwood City Pa. Labate (V.St.A.) Verfahren und Vorrichtung zum Einführen von Entschwefelungs- oder Legierungszusätzen unter dem Metallbadspiegel
DD128912A5 (de) * 1977-03-23 1977-12-14 Foseco Trading Ag Traegerkoerper fuer zuschlagstoffe zu metallschmelzen

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1869925A (en) * 1930-09-24 1932-08-02 Hugh C Sicard Article for introducing materials in a metallurgical bath
DE1021395B (de) * 1952-06-17 1957-12-27 Metallgesellschaft Ag Verfahren zur Herstellung von Gusseisen mit Kugelgraphit
CH331292A (de) * 1952-10-27 1958-07-15 Mond Nickel Co Ltd Verfahren zur Herstellung von Gusseisen
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 (de) * 1969-08-01 1971-02-11 Koerver & Nehring Gmbh Maschin Vorrichtung zur Behandlung,wie z.B. durch Begasung,zum Reinigen von Metallschmelzen,insbesondere zum Herstellen von Gusseisen mit Kugelgraphit
DE2331052A1 (de) * 1972-06-21 1974-01-10 Foseco Int Vorrichtung zur einfuehrung von niedrigsiedenden feststoffen in geschmolzenes metall
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 (de) * 1975-07-25 1977-02-10 Metallgesellschaft Ag Verfahren zur herstellung von gusseisen mit kugelgraphit
US4060407A (en) * 1975-08-25 1977-11-29 Reactive Metals & Alloys Corporation Methods and apparatus for adding mischmetal to molten steel
FR2328050A1 (fr) * 1975-10-15 1977-05-13 Foseco Trading Ag Bloc support pour l'introduction de reactifs dans des metaux fondus
FR2377452A1 (fr) * 1977-01-18 1978-08-11 Canron Ltd Procede et appareil pour traiter un metal en fusion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982003875A1 (fr) * 1981-05-08 1982-11-11 Lustenberger Hans Chambre d'immersion et de vaporisation
US4496393A (en) * 1981-05-08 1985-01-29 George Fischer Limited Immersion and vaporization chamber
EP0309781A1 (fr) * 1987-09-24 1989-04-05 Zavody Tezkeho Strojirenstvi Kombinat Kombinatni Podnik Procédé pour ajouter des additifs volatils et fusibles dans des alliages ferreux fondus et dispositif pour sa réalisation

Also Published As

Publication number Publication date
EP0003037A1 (fr) 1979-07-25
CH638242A5 (de) 1983-09-15
ZA7949B (en) 1980-01-30
CA1119413A (fr) 1982-03-09

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