FR2154795A1 - Refining phosphorus rich cast irons - by blowing with an oxygen/lime powder suspension - Google Patents

Refining phosphorus rich cast irons - by blowing with an oxygen/lime powder suspension

Info

Publication number
FR2154795A1
FR2154795A1 FR7234876A FR7234876A FR2154795A1 FR 2154795 A1 FR2154795 A1 FR 2154795A1 FR 7234876 A FR7234876 A FR 7234876A FR 7234876 A FR7234876 A FR 7234876A FR 2154795 A1 FR2154795 A1 FR 2154795A1
Authority
FR
France
Prior art keywords
lime
blown
oxygen
blowing
lime powder
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
FR7234876A
Other languages
French (fr)
Other versions
FR2154795B3 (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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of FR2154795A1 publication Critical patent/FR2154795A1/en
Application granted granted Critical
Publication of FR2154795B3 publication Critical patent/FR2154795B3/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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/32—Blowing from above

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

In a process for refining phosphorus rich crude cast iron to transform it into steel, a suspension of oxygen- and powdered lime is blown into the melt via a multiple orifice lance; 80% of the lime necessary is blown into the melt during the first five minutes, then pure O2 is blown until 70% of the blow time has passed and finally the remaining 20% of lime is blown in. The process uses lime normally used in steel prodn. to form a single slag without the need for special measuring appts. The steel produced has a final P content of 0.03%.
FR7234876A 1971-10-01 1972-10-02 Refining phosphorus rich cast irons - by blowing with an oxygen/lime powder suspension Granted FR2154795A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712149023 DE2149023C3 (en) 1971-10-01 1971-10-01 Process for refining pig iron rich in phosphorus

Publications (2)

Publication Number Publication Date
FR2154795A1 true FR2154795A1 (en) 1973-05-11
FR2154795B3 FR2154795B3 (en) 1975-10-31

Family

ID=5821166

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7234876A Granted FR2154795A1 (en) 1971-10-01 1972-10-02 Refining phosphorus rich cast irons - by blowing with an oxygen/lime powder suspension

Country Status (4)

Country Link
BE (1) BE789599A (en)
DE (1) DE2149023C3 (en)
FR (1) FR2154795A1 (en)
LU (1) LU66209A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3434894C2 (en) * 1984-09-22 1986-09-18 Thyssen Stahl AG, 4100 Duisburg Process for refining pig iron
US5584909A (en) * 1995-01-19 1996-12-17 Ltv Steel Company, Inc. Controlled foamy slag process
US5885323A (en) * 1997-04-25 1999-03-23 Ltv Steel Company, Inc. Foamy slag process using multi-circuit lance

Also Published As

Publication number Publication date
DE2149023B2 (en) 1974-01-17
DE2149023A1 (en) 1973-04-12
DE2149023C3 (en) 1978-09-07
FR2154795B3 (en) 1975-10-31
LU66209A1 (en) 1973-01-23
BE789599A (en) 1973-02-01

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