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FR2356732A1 - Removing phosphorus from metals or alloys - by treating melt with compsn. contg. calcium carbide and alkaline earth metal halide - Google Patents

Removing phosphorus from metals or alloys - by treating melt with compsn. contg. calcium carbide and alkaline earth metal halide

Info

Publication number
FR2356732A1
FR2356732A1 FR7620011A FR7620011A FR2356732A1 FR 2356732 A1 FR2356732 A1 FR 2356732A1 FR 7620011 A FR7620011 A FR 7620011A FR 7620011 A FR7620011 A FR 7620011A FR 2356732 A1 FR2356732 A1 FR 2356732A1
Authority
FR
France
Prior art keywords
alloys
metals
alkaline earth
earth metal
calcium carbide
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
FR7620011A
Other languages
French (fr)
Other versions
FR2356732B1 (en
Inventor
Hiroyuki Katayama
Makoto Inatomi
Hiroyuki Kajioka
Yasushi Nakamura
Michihisa Ito
Kazuumi Harashima
Takamasa Ohno
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
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to FR7620011A priority Critical patent/FR2356732A1/en
Publication of FR2356732A1 publication Critical patent/FR2356732A1/en
Application granted granted Critical
Publication of FR2356732B1 publication Critical patent/FR2356732B1/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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/006—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with use of an inert protective material including the use of an inert gas
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents

Landscapes

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

Abstract

Procédé de déphosphoration de métaux ou d'alliages et nouveaux produits ainsi obtenus. Dans ce procédé, un métal ou un alliage fondu, à insaturation en carbone, contenant des éléments plus oxydables que le fer, tels que le chrome et le silicium, est déphosphoré par addition d'une composition de fondant comprenant du carbure de calcium et un halogénure d'un métal alcalino-terreux tel que du fluorure de calcium sous une atmosphère non oxydante et ensuite la scorie en tant que sous-produit est stabilisée contre la formation de gaz indésirables. La présente invention est particulièrement utile pour la production d'acier inoxydable à faible teneur en phosphore.Process for dephosphorizing metals or alloys and new products thus obtained. In this process, a molten, carbon-unsaturated metal or alloy containing elements more oxidizable than iron, such as chromium and silicon, is dephosphorized by adding a flux composition comprising calcium carbide and a halide of an alkaline earth metal such as calcium fluoride under a non-oxidizing atmosphere and then the slag as a by-product is stabilized against the formation of unwanted gases. The present invention is particularly useful for the production of low phosphorus stainless steel.

FR7620011A 1976-06-30 1976-06-30 Removing phosphorus from metals or alloys - by treating melt with compsn. contg. calcium carbide and alkaline earth metal halide Granted FR2356732A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7620011A FR2356732A1 (en) 1976-06-30 1976-06-30 Removing phosphorus from metals or alloys - by treating melt with compsn. contg. calcium carbide and alkaline earth metal halide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7620011A FR2356732A1 (en) 1976-06-30 1976-06-30 Removing phosphorus from metals or alloys - by treating melt with compsn. contg. calcium carbide and alkaline earth metal halide

Publications (2)

Publication Number Publication Date
FR2356732A1 true FR2356732A1 (en) 1978-01-27
FR2356732B1 FR2356732B1 (en) 1981-03-20

Family

ID=9175082

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7620011A Granted FR2356732A1 (en) 1976-06-30 1976-06-30 Removing phosphorus from metals or alloys - by treating melt with compsn. contg. calcium carbide and alkaline earth metal halide

Country Status (1)

Country Link
FR (1) FR2356732A1 (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
FR2593520A1 (en) * 1985-11-21 1987-07-31 Wilson William PROCESS FOR REMOVING SULFUR AND HYDROGEN FROM STEEL

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
FR2593520A1 (en) * 1985-11-21 1987-07-31 Wilson William PROCESS FOR REMOVING SULFUR AND HYDROGEN FROM STEEL

Also Published As

Publication number Publication date
FR2356732B1 (en) 1981-03-20

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Legal Events

Date Code Title Description
ST Notification of lapse