US3637373A - Compositions for the treatment of molten iron - Google Patents

Compositions for the treatment of molten iron Download PDF

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Publication number
US3637373A
US3637373A US14799A US3637373DA US3637373A US 3637373 A US3637373 A US 3637373A US 14799 A US14799 A US 14799A US 3637373D A US3637373D A US 3637373DA US 3637373 A US3637373 A US 3637373A
Authority
US
United States
Prior art keywords
magnesium
iron
treatment
molten iron
percent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US14799A
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English (en)
Inventor
Karl Gusten Bylund
Evert Henry Bark
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.)
Jarnforadling AB
Original Assignee
Jarnforadling AB
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 Jarnforadling AB filed Critical Jarnforadling AB
Application granted granted Critical
Publication of US3637373A publication Critical patent/US3637373A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising

Definitions

  • This invention relates to a composition for the treatment of molten iron.
  • the composition is particularly useful for the production of nodular iron, it can be used also for other purposes, such as the desulphurization of iron.
  • the above named disadvantages are reduced by the present invention which relates to a composition for the treatment of molten iron, which is cheap and gives a high yield and low temperature losses, simultaneously as no complicated or expensive equipment is required.
  • the composition according to the present invention is characterized in that it consists of a mechanical mixture, compacted into solid porous bodies, of at least magnesium which serves as an alloying agent, and sponge iron which serves as a reaction retarding agent.
  • magnesium powder is mixed mechanically with crushed sponge iron, whereupon the mixture is compacted into solid bodies.
  • the mixture can thus be briquetted. It can also be combined with a suitable bonding agent to form the solid bodies.
  • the briquettes may be given for instance cylindrical shape, with a diameter of 120 mm. and a height of -150 mm.; in other words, the solid bodies have a volume in the order of 1,000 cubic centimeters.
  • the amount of magnesium in the said bodies can be varied within wide limits depending upon the desired amount of mag-' nesium in the iron.
  • the magnesium may amount to 4-40 percent of the wei ht of the bodies preferably 5-25 percent.
  • the bodies are porous so that, according as the temperature therein rises, the magnesium gas formed is forced out and alloyed with the iron.
  • a suitable porosity is obtained if an apparent density of between 2 and 4 grams per cubic centimeter is imparted to the solid bodies, the lower apparent density being used for a composition having a large amount of magnesium and the higher apparent density for a composition having a low amount of magnesium.- Normally, the apparent density will lie at approximately 3 grams per cubic centimeter.
  • the theoretical density of sponge iron is approximately 7 grams per cubic centimeter, for which reason the bodies have a porosity of approximately 50 percent.
  • reaction retarding agent of composition consists of cast iron turnings instead of sponge iron.
  • minor amounts of other substances may also be included in the mechanical mixture compacted into the solid bodies, for instance cerium, mischmetal and the like or ferrosilicon, graphite, slag binders and the like, the amount of the additive normally being approximately 0.5 percent.
  • the solid bodies can be introduced by means of an immersion ladle or the like into a cast iron melt in a processing ladle, whereby the alloying with magnesium is obtained.
  • An agent for use in the treatment of molten iron which consists essentially of a porous body consisting essentially of a mechanical mixture of sponge iron and magnesium powder, the latter in the proportion of 4-40 percent of the weight of the body, the porosity of the body being approximately 50 percent, the apparent density of the porous body being between 2 and 4 grams per cubic centimeter.
  • porous body additionally contains approximately 0.5 percent of a member selected from the group consisting of cerium, ferrosilicon, graphite, or slag binder and a mixture thereof.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
US14799A 1967-06-08 1970-03-02 Compositions for the treatment of molten iron Expired - Lifetime US3637373A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8044/67A SE321095B (enExample) 1967-06-08 1967-06-08

Publications (1)

Publication Number Publication Date
US3637373A true US3637373A (en) 1972-01-25

Family

ID=20272991

Family Applications (1)

Application Number Title Priority Date Filing Date
US14799A Expired - Lifetime US3637373A (en) 1967-06-08 1970-03-02 Compositions for the treatment of molten iron

Country Status (7)

Country Link
US (1) US3637373A (enExample)
DE (1) DE1758468B1 (enExample)
FI (1) FI48853C (enExample)
FR (1) FR1568576A (enExample)
GB (1) GB1201397A (enExample)
NO (1) NO123576B (enExample)
SE (1) SE321095B (enExample)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945819A (en) * 1973-08-03 1976-03-23 N L Industries, Inc. Ferrous metal network impregnated with magnesium metal
US3957502A (en) * 1971-11-17 1976-05-18 Magnesium Elektron Limited Addition of magnesium to molten metal
US3984233A (en) * 1975-02-12 1976-10-05 Nl Industries, Inc. Ferrous metal network impregnated with rare earth metals
US4224069A (en) * 1978-07-19 1980-09-23 General Motors Corporation Transportation stable magnesium and iron diluent particle mixtures for treating molten iron
US4362562A (en) * 1980-02-20 1982-12-07 Electro-Nite Method for taking samples from pig-iron melts
US6372014B1 (en) 2000-04-10 2002-04-16 Rossborough Manufacturing Co. L.P. Magnesium injection agent for ferrous metal
US6383249B2 (en) 2000-04-10 2002-05-07 Rossborough Manufacturing Co. Lp Magnesium desulfurization agent
US20040083851A1 (en) * 2002-10-30 2004-05-06 Rossborough Manufacturing Company, A Delaware Corporation Reclaimed magnesium desulfurization agent
US20070221012A1 (en) * 2006-03-27 2007-09-27 Magnesium Technologies Corporation Scrap bale for steel making process
US20080196548A1 (en) * 2007-02-16 2008-08-21 Magnesium Technologies Corporation Desulfurization puck

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2231755A1 (en) * 1973-05-28 1974-12-27 Pont A Mousson Spheroidising inoculant for graphite cast iron - using pellets made from pure magnesium and iron powders and placed in the downgate
JPS5261115A (en) * 1975-11-14 1977-05-20 Aikoh Co Magnesium base iron melt treating material
DE2753282C2 (de) * 1976-12-06 1984-05-30 Foseco International Ltd., Birmingham Mittel zur metallurgischen Behandlung von flüssigem Eisen sowie Verwendung des Mittels
DE2948636A1 (de) * 1979-12-04 1981-06-11 Metallgesellschaft Ag, 6000 Frankfurt Drahtfoermiges mittel zum behandeln von metallschmelzen
GB9021351D0 (en) * 1990-10-01 1990-11-14 Castex Prod Magnesium alloying agent
EP3170578B1 (de) * 2015-11-17 2021-06-30 GF Casting Solutions Kunshan Co. Ltd. Verfahren zur herstellung eines gussstücks aus gusseisen mit kugelgraphit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1555978A (en) * 1920-08-26 1925-10-06 American Magnesium Corp Metal stock
US3393996A (en) * 1965-11-29 1968-07-23 Dow Chemical Co Treating agent for ferrous metals
US3459541A (en) * 1966-09-22 1969-08-05 Gen Motors Corp Process for making nodular iron

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1555978A (en) * 1920-08-26 1925-10-06 American Magnesium Corp Metal stock
US3393996A (en) * 1965-11-29 1968-07-23 Dow Chemical Co Treating agent for ferrous metals
US3459541A (en) * 1966-09-22 1969-08-05 Gen Motors Corp Process for making nodular iron

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3957502A (en) * 1971-11-17 1976-05-18 Magnesium Elektron Limited Addition of magnesium to molten metal
US3945819A (en) * 1973-08-03 1976-03-23 N L Industries, Inc. Ferrous metal network impregnated with magnesium metal
US3984233A (en) * 1975-02-12 1976-10-05 Nl Industries, Inc. Ferrous metal network impregnated with rare earth metals
US4224069A (en) * 1978-07-19 1980-09-23 General Motors Corporation Transportation stable magnesium and iron diluent particle mixtures for treating molten iron
US4362562A (en) * 1980-02-20 1982-12-07 Electro-Nite Method for taking samples from pig-iron melts
US6383249B2 (en) 2000-04-10 2002-05-07 Rossborough Manufacturing Co. Lp Magnesium desulfurization agent
US6372014B1 (en) 2000-04-10 2002-04-16 Rossborough Manufacturing Co. L.P. Magnesium injection agent for ferrous metal
US6395058B2 (en) 2000-04-10 2002-05-28 Rossborough Manufacturing Co. L.P. Method of alloying ferrous material with magnesium injection agent
US20040083851A1 (en) * 2002-10-30 2004-05-06 Rossborough Manufacturing Company, A Delaware Corporation Reclaimed magnesium desulfurization agent
US6989040B2 (en) 2002-10-30 2006-01-24 Gerald Zebrowski Reclaimed magnesium desulfurization agent
US20060021467A1 (en) * 2002-10-30 2006-02-02 Magnesium Technologies, Inc. Reclaimed magnesium desulfurization agent
US20070221012A1 (en) * 2006-03-27 2007-09-27 Magnesium Technologies Corporation Scrap bale for steel making process
US7731778B2 (en) 2006-03-27 2010-06-08 Magnesium Technologies Corporation Scrap bale for steel making process
US20080196548A1 (en) * 2007-02-16 2008-08-21 Magnesium Technologies Corporation Desulfurization puck

Also Published As

Publication number Publication date
GB1201397A (en) 1970-08-05
NO123576B (enExample) 1971-12-13
DE1758468B1 (de) 1973-08-23
FI48853C (fi) 1975-01-10
FR1568576A (enExample) 1969-05-23
SE321095B (enExample) 1970-02-23
FI48853B (enExample) 1974-09-30

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