GB874393A - Improvements in or relating to processes for the production of high-grade cast-iron - Google Patents

Improvements in or relating to processes for the production of high-grade cast-iron

Info

Publication number
GB874393A
GB874393A GB33149/57A GB3314957A GB874393A GB 874393 A GB874393 A GB 874393A GB 33149/57 A GB33149/57 A GB 33149/57A GB 3314957 A GB3314957 A GB 3314957A GB 874393 A GB874393 A GB 874393A
Authority
GB
United Kingdom
Prior art keywords
magnesium
sodium carbonate
loaded
iron
spheroidal graphite
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
Application number
GB33149/57A
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.)
Voestalpine AG
Vereinigte Osterreichische Eisen und Stahlwerke AG
Original Assignee
Voestalpine AG
Vereinigte Osterreichische Eisen und Stahlwerke 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 Voestalpine AG, Vereinigte Osterreichische Eisen und Stahlwerke AG filed Critical Voestalpine AG
Publication of GB874393A publication Critical patent/GB874393A/en
Expired 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
    • C21C1/10—Making spheroidal graphite cast-iron

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

Spheroidal graphite cast iron is made by melting a normal cast iron charge in an acid cupola, blowing oxygen loaded with slag forming agents on to the surface of the metal in a ladle to remove phosphorous and other impurities and reduce the silicon content to less than 1%, and adding silicon magnesium alloys to form the spheroidal graphite structure. The oxygen may be blown from a 10mm. tube supplying 10 cubic meters per ton of the bath under a pressure of 2-10 kg. per square centimeter, raising the temperature of the bath to 1500 DEG C. This blast may be loaded with a suspension of iron oxide such as is produced from the fume evolved by the L.D. process, together with lime and sodium carbonate. Magnesium may then be added in the form of an SiMgFe alloy containing 38-48% Si and 14-20% Mg. Prior to blowing, sulphur may be removed by pretreatment with sodium carbonate, magnesium or calcium carbide. Reference has been directed by the comptroller to Specification 630,070.
GB33149/57A 1956-10-24 1957-10-23 Improvements in or relating to processes for the production of high-grade cast-iron Expired GB874393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT874393X 1956-10-24

Publications (1)

Publication Number Publication Date
GB874393A true GB874393A (en) 1961-08-10

Family

ID=3682575

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33149/57A Expired GB874393A (en) 1956-10-24 1957-10-23 Improvements in or relating to processes for the production of high-grade cast-iron

Country Status (1)

Country Link
GB (1) GB874393A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184460A (en) * 1985-12-23 1987-06-24 Fischer Ag Georg Process for the after-treatment of molten cast iron

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184460A (en) * 1985-12-23 1987-06-24 Fischer Ag Georg Process for the after-treatment of molten cast iron
GB2184460B (en) * 1985-12-23 1990-07-25 Fischer Ag Georg Process for the after-treatment of molten cast iron

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