EP0003037A1 - Verfahren, Vorrichtung und Mittel zum Behandeln von Eisenschmelzen mit einem festen Reinalkali- oder Erdalkalimetall - Google Patents

Verfahren, Vorrichtung und Mittel zum Behandeln von Eisenschmelzen mit einem festen Reinalkali- oder Erdalkalimetall Download PDF

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Publication number
EP0003037A1
EP0003037A1 EP78101809A EP78101809A EP0003037A1 EP 0003037 A1 EP0003037 A1 EP 0003037A1 EP 78101809 A EP78101809 A EP 78101809A EP 78101809 A EP78101809 A EP 78101809A EP 0003037 A1 EP0003037 A1 EP 0003037A1
Authority
EP
European Patent Office
Prior art keywords
hollow body
melt
treatment
treatment vessel
pure
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.)
Ceased
Application number
EP78101809A
Other languages
German (de)
English (en)
French (fr)
Inventor
Klaus Dipl.-Ing. Hornung
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Georg Fischer AG
Original Assignee
Georg Fischer AG
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 Georg Fischer AG filed Critical Georg Fischer AG
Publication of EP0003037A1 publication Critical patent/EP0003037A1/de
Ceased legal-status Critical Current

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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, 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 hollow body attached to a cover with hydraulic cylinders in a heavy version.
  • 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 process 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 location 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 cheaply through the single use and through a wire mesh reinforcement or a fiber reinforcement. There is no need to clean the hollow body or to pour the treated melt into a transport pan. Temperature losses of the Melting through 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 be done within a very short time. Any conventional ladle can be used as a treatment vessel without any modification.
  • cylindrical hollow body 1 from a hardened at 400 ° C phosphate-bonded, 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 at its lower end 8 on.
  • Fiber reinforcement instead of wire mesh reinforcement 2 serves the same purpose.
  • 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. This ensures optimal adaptation to the metallurgical conditions.
  • the size of the holes depends, among other things, on the initial temperature, the chemical composition and the desired reaction delay.
  • 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 due to the risk of premature destruction of the hollow body due to 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 42 mm 2 per kg Mg and the diameter is in the range from approximately 12 to 30 mm.
  • Approximately 4 openings 10 are preferably provided in the upper region of the hollow body 1.
  • the hollow body 1 is screwed with the bolt 7 into a holding member in the form of a holding rod 15 made of metal (welding is also possible) and is located near the bottom of a treatment vessel of a normal ladle. 16 in position.
  • the hollow body 1 can also be fastened to a stopper rod or to a fastening rod guided through the base spout of the pan.
  • 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 standby position can be quickly brought into position on a second holding rod 25 and a second arm 26 during a subsequent treatment.
  • the support rod 15 can also be supported for the sake of simplicity by means of a crossbar not shown on the pan edge.
  • the pan 16 is filled with a cast iron melt to be treated from a tapping pan 29 to approximately half the height 30.
  • the reaction which begins after about 30 seconds takes about 120 seconds.
  • the duration of the reaction delay can be controlled by the diameter of the opening 9 and is preferably 25 to 30 seconds, so that the treatment pan, without Mg losses due to premature Onset of the reaction can be filled with melt.
  • the bath level 33 should be at least 30 cm above the highest elevations of the hollow body at a height of 30, since otherwise the application will be insufficient.
  • the upper pan wall forms a splash guard. This makes it possible for the method to be carried out without a lid.
  • a suction hood for dust or vapors can possibly be provided.
  • the reaction time is waited, the melt being overtreated, and thereafter the same is left untreated 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 Mg quantities.
  • 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 plug rod.

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)
EP78101809A 1978-01-06 1978-12-21 Verfahren, Vorrichtung und Mittel zum Behandeln von Eisenschmelzen mit einem festen Reinalkali- oder Erdalkalimetall Ceased EP0003037A1 (de)

Applications Claiming Priority (2)

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

Publications (1)

Publication Number Publication Date
EP0003037A1 true EP0003037A1 (de) 1979-07-25

Family

ID=4179976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78101809A Ceased EP0003037A1 (de) 1978-01-06 1978-12-21 Verfahren, Vorrichtung und Mittel zum Behandeln von Eisenschmelzen mit einem festen Reinalkali- oder Erdalkalimetall

Country Status (5)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041680A1 (de) * 1980-06-10 1981-12-16 Klöckner-Humboldt-Deutz Aktiengesellschaft Vorrichtung zum Einführen stark reagierender Zusätze in eine Metallschmelze
FR2493873A1 (fr) * 1980-11-07 1982-05-14 Dunn Jr Edward Procede d'epuration de l'acier en poche de coulee
EP1030151A1 (en) * 1997-08-04 2000-08-23 Insul Company Inc. Consumable recharging box for material

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH656399A5 (de) * 1981-05-08 1986-06-30 Fischer Ag Georg Tauch-verdampfungskammer.
CS265400B1 (en) * 1987-09-24 1989-10-13 Jaroslav Ing Csc Polak Process for adding evaporable and meltable additives in melt ferrous alloys and device for making this process
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
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
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

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
DE2533246A1 (de) * 1975-07-25 1977-02-10 Metallgesellschaft Ag Verfahren zur herstellung von gusseisen mit kugelgraphit
DE2558072A1 (de) * 1975-12-22 1977-07-07 Labate Michael D Verfahren und vorrichtung zum einfuehren von entschwefelungs- oder anderen zusaetzen unter dem metallbadspiegel
US4060407A (en) * 1975-08-25 1977-11-29 Reactive Metals & Alloys Corporation Methods and apparatus for adding mischmetal to molten steel
DD128912A5 (de) * 1977-03-23 1977-12-14 Foseco Trading Ag Traegerkoerper fuer zuschlagstoffe zu metallschmelzen
DE2732136A1 (de) * 1977-01-18 1978-07-20 Canron Ltd Behandlung von geschmolzenem metall

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942775A (en) * 1973-04-02 1976-03-09 Labate Michael D Submerged desulphurization device and method
SE7611368L (sv) * 1975-10-15 1977-04-16 Tarek El Gammal Berarkropp for inforande av reaktionsmedel i metallsmeltor

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
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
DE2558072A1 (de) * 1975-12-22 1977-07-07 Labate Michael D Verfahren und vorrichtung zum einfuehren von entschwefelungs- oder anderen zusaetzen unter dem metallbadspiegel
DE2732136A1 (de) * 1977-01-18 1978-07-20 Canron Ltd Behandlung von geschmolzenem metall
DD128912A5 (de) * 1977-03-23 1977-12-14 Foseco Trading Ag Traegerkoerper fuer zuschlagstoffe zu metallschmelzen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041680A1 (de) * 1980-06-10 1981-12-16 Klöckner-Humboldt-Deutz Aktiengesellschaft Vorrichtung zum Einführen stark reagierender Zusätze in eine Metallschmelze
FR2493873A1 (fr) * 1980-11-07 1982-05-14 Dunn Jr Edward Procede d'epuration de l'acier en poche de coulee
EP1030151A1 (en) * 1997-08-04 2000-08-23 Insul Company Inc. Consumable recharging box for material

Also Published As

Publication number Publication date
WO1979000481A1 (en) 1979-07-26
CH638242A5 (de) 1983-09-15
ZA7949B (en) 1980-01-30
CA1119413A (en) 1982-03-09

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: HORNUNG, KLAUS, DIPL.-ING.