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FR2428672A1 - PROCESS FOR DEPHOSPHORATION OF A STEEL BATH IN REDUCING PHASE - Google Patents

PROCESS FOR DEPHOSPHORATION OF A STEEL BATH IN REDUCING PHASE

Info

Publication number
FR2428672A1
FR2428672A1 FR7817870A FR7817870A FR2428672A1 FR 2428672 A1 FR2428672 A1 FR 2428672A1 FR 7817870 A FR7817870 A FR 7817870A FR 7817870 A FR7817870 A FR 7817870A FR 2428672 A1 FR2428672 A1 FR 2428672A1
Authority
FR
France
Prior art keywords
bath
calcium
reducing phase
dephosphoration
steel
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
FR7817870A
Other languages
French (fr)
Other versions
FR2428672B3 (en
Inventor
Christian Gatellier
Paul-Victor Riboud
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to FR7817870A priority Critical patent/FR2428672A1/en
Publication of FR2428672A1 publication Critical patent/FR2428672A1/en
Application granted granted Critical
Publication of FR2428672B3 publication Critical patent/FR2428672B3/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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/064—Dephosphorising; Desulfurising

Landscapes

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

Abstract

L'invention concerne un procédé de déphosphoration d'un bain d'acier en phase réductrice. Le procédé selon l'invention consiste à introduire dans le bain d'un produit solide pulvérulent constitué par un alcalino-terreux, de préférence du calcium pur, ou allié, ou mélangé à l'un de ses halogénures et à créer, en contact avec la surface du bain, un milieu qui ne soit pas susceptible de réagir avec les phosphures de calcium formés dans le bain, par exemple une atmosphère inerte ou un laitier basique pas ou peu oxydant à l'égard du calcium. Le procédé s'applique de préférence à un bain d'acier préalablement désoxydé. Il permet une élimination sélective du phosphore sans affecter les éléments d'alliage ou d'addition que l'on souhaite voir demeurer dans le bain.The invention relates to a process for dephosphorizing a steel bath in a reducing phase. The method according to the invention consists in introducing into the bath a pulverulent solid product consisting of an alkaline earth metal, preferably pure calcium, or an alloy, or mixed with one of its halides and creating, in contact with the surface of the bath, a medium which is not capable of reacting with the calcium phosphides formed in the bath, for example an inert atmosphere or a basic slag with no or little oxidizing with regard to calcium. The process is preferably applied to a bath of previously deoxidized steel. It allows a selective removal of phosphorus without affecting the alloying or addition elements that one wishes to see remain in the bath.

FR7817870A 1978-06-14 1978-06-14 PROCESS FOR DEPHOSPHORATION OF A STEEL BATH IN REDUCING PHASE Granted FR2428672A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7817870A FR2428672A1 (en) 1978-06-14 1978-06-14 PROCESS FOR DEPHOSPHORATION OF A STEEL BATH IN REDUCING PHASE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7817870A FR2428672A1 (en) 1978-06-14 1978-06-14 PROCESS FOR DEPHOSPHORATION OF A STEEL BATH IN REDUCING PHASE

Publications (2)

Publication Number Publication Date
FR2428672A1 true FR2428672A1 (en) 1980-01-11
FR2428672B3 FR2428672B3 (en) 1981-02-06

Family

ID=9209538

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7817870A Granted FR2428672A1 (en) 1978-06-14 1978-06-14 PROCESS FOR DEPHOSPHORATION OF A STEEL BATH IN REDUCING PHASE

Country Status (1)

Country Link
FR (1) FR2428672A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067093A1 (en) * 1981-05-22 1982-12-15 Institut De Recherches De La Siderurgie Francaise (Irsid) Process for treating phosphided slags
EP0363749A1 (en) * 1988-10-07 1990-04-18 Leybold Aktiengesellschaft Process for dephosphorizing molten metals by treating with alkali metals and alkaline earth metals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067093A1 (en) * 1981-05-22 1982-12-15 Institut De Recherches De La Siderurgie Francaise (Irsid) Process for treating phosphided slags
EP0363749A1 (en) * 1988-10-07 1990-04-18 Leybold Aktiengesellschaft Process for dephosphorizing molten metals by treating with alkali metals and alkaline earth metals

Also Published As

Publication number Publication date
FR2428672B3 (en) 1981-02-06

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