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FR2366365A1 - Dephosphorising liq. pig iron in steel mfr. - using a single slag process - Google Patents

Dephosphorising liq. pig iron in steel mfr. - using a single slag process

Info

Publication number
FR2366365A1
FR2366365A1 FR7629376A FR7629376A FR2366365A1 FR 2366365 A1 FR2366365 A1 FR 2366365A1 FR 7629376 A FR7629376 A FR 7629376A FR 7629376 A FR7629376 A FR 7629376A FR 2366365 A1 FR2366365 A1 FR 2366365A1
Authority
FR
France
Prior art keywords
dephosphorising
liq
pig iron
slag process
single slag
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.)
Granted
Application number
FR7629376A
Other languages
French (fr)
Other versions
FR2366365B1 (en
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to FR7629376A priority Critical patent/FR2366365A1/en
Publication of FR2366365A1 publication Critical patent/FR2366365A1/en
Application granted granted Critical
Publication of FR2366365B1 publication Critical patent/FR2366365B1/fr
Granted 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

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

L'invention se rapporte à la sidérurgie. Elle concerne un procédé de déphosphoration de fonte liquide, caractérisé en ce que l'on ajoute à celle-ci: a. Un agent de déphosphoration qui peut être la chaux, un laitier de convertisseur ou un mélange de ceux-ci ; et b. Un oxydant qui est tel que l'on obtienne un laitier contenant une quantité de CaO qui représente de 0,3 à 2,5 fois la somme des quantités de SiO2 et P2 O5 et qui a un T.Fe de 15 à 50 %. Utilisation pour la production d'aciers spéciaux.The invention relates to the steel industry. It relates to a process for dephosphorizing liquid cast iron, characterized in that the following are added to it: a. A dephosphorizing agent which may be lime, converter slag or a mixture thereof; and B. An oxidant which is such that a slag is obtained containing a quantity of CaO which represents from 0.3 to 2.5 times the sum of the quantities of SiO2 and P2 O5 and which has a T.Fe of 15 to 50%. Use for the production of special steels.

FR7629376A 1976-09-30 1976-09-30 Dephosphorising liq. pig iron in steel mfr. - using a single slag process Granted FR2366365A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7629376A FR2366365A1 (en) 1976-09-30 1976-09-30 Dephosphorising liq. pig iron in steel mfr. - using a single slag process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7629376A FR2366365A1 (en) 1976-09-30 1976-09-30 Dephosphorising liq. pig iron in steel mfr. - using a single slag process

Publications (2)

Publication Number Publication Date
FR2366365A1 true FR2366365A1 (en) 1978-04-28
FR2366365B1 FR2366365B1 (en) 1983-04-01

Family

ID=9178232

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7629376A Granted FR2366365A1 (en) 1976-09-30 1976-09-30 Dephosphorising liq. pig iron in steel mfr. - using a single slag process

Country Status (1)

Country Link
FR (1) FR2366365A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460336A1 (en) * 1979-06-29 1981-01-23 Nisshin Steel Co Ltd METHOD FOR DEPHOSPHORIZATION AND DENITRATION OF CHROMIUM-CONTAINING CAST IRON
FR2485567A1 (en) * 1980-06-27 1981-12-31 Nisshin Steel Co Ltd Denitrifying slag for molten ferrous alloy contg. chromium - contains alkali metal carbonate, oxide, and/or hydroxide, together with fluoride and/or chloride, and iron and/or nickel oxide
FR2492407A1 (en) * 1980-10-21 1982-04-23 Nisshin Steel Co Ltd PROCESS FOR DEPHOSPHORIZATION, DESULFURATION AND DENITRATION OF CHROME-CONTAINING CAST IRON

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460336A1 (en) * 1979-06-29 1981-01-23 Nisshin Steel Co Ltd METHOD FOR DEPHOSPHORIZATION AND DENITRATION OF CHROMIUM-CONTAINING CAST IRON
FR2485567A1 (en) * 1980-06-27 1981-12-31 Nisshin Steel Co Ltd Denitrifying slag for molten ferrous alloy contg. chromium - contains alkali metal carbonate, oxide, and/or hydroxide, together with fluoride and/or chloride, and iron and/or nickel oxide
FR2492407A1 (en) * 1980-10-21 1982-04-23 Nisshin Steel Co Ltd PROCESS FOR DEPHOSPHORIZATION, DESULFURATION AND DENITRATION OF CHROME-CONTAINING CAST IRON

Also Published As

Publication number Publication date
FR2366365B1 (en) 1983-04-01

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