GB810312A - Improvements in the manufacture of cast iron - Google Patents

Improvements in the manufacture of cast iron

Info

Publication number
GB810312A
GB810312A GB2791/56A GB279156A GB810312A GB 810312 A GB810312 A GB 810312A GB 2791/56 A GB2791/56 A GB 2791/56A GB 279156 A GB279156 A GB 279156A GB 810312 A GB810312 A GB 810312A
Authority
GB
United Kingdom
Prior art keywords
mixture
mesh
per cent
magnesium
cast iron
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
GB2791/56A
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.)
Airco Inc
Original Assignee
Air Reduction Co Inc
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 Air Reduction Co Inc filed Critical Air Reduction Co Inc
Publication of GB810312A publication Critical patent/GB810312A/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 obtained by introducing beneath the surface of a bath of cast iron, a stream of inert gas containing a mixture of calcium carbide of particle size passing 20 mesh and having 90 per cent retained on 200 mesh and magnesium of particle size passing 20 mesh and having 90 per cent retained on 100 mesh, the amount of magnesium being 5-15 per cent of the mixture. The metal may be treated with calcium carbide alone to remove sulphur before the mixture is injected. A rare earth substance, e.g. a rare earth metal oxide, may be present in the mixture, in amount between 5 and 15 per cent. The gas used may be any gas which does not react with iron or magnesium at the temperatures employed, e.g. dry nitrogen, and the mixture may be present in such amount to give 1/4 -2 cubic of gas per pound of mixture. Specifications 630,070, 746,452, and 748,474 and U.S.A. Specification 2,577,764 are referred to.
GB2791/56A 1955-02-07 1956-01-27 Improvements in the manufacture of cast iron Expired GB810312A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US810312XA 1955-02-07 1955-02-07

Publications (1)

Publication Number Publication Date
GB810312A true GB810312A (en) 1959-03-11

Family

ID=22161675

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2791/56A Expired GB810312A (en) 1955-02-07 1956-01-27 Improvements in the manufacture of cast iron

Country Status (1)

Country Link
GB (1) GB810312A (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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