FR2433581A1 - Deoxidising, desulphurising and refining steel - by means of a liquid slag and aluminium additions - Google Patents

Deoxidising, desulphurising and refining steel - by means of a liquid slag and aluminium additions

Info

Publication number
FR2433581A1
FR2433581A1 FR7919235A FR7919235A FR2433581A1 FR 2433581 A1 FR2433581 A1 FR 2433581A1 FR 7919235 A FR7919235 A FR 7919235A FR 7919235 A FR7919235 A FR 7919235A FR 2433581 A1 FR2433581 A1 FR 2433581A1
Authority
FR
France
Prior art keywords
slag
vessel
metal
steel
reduces
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
FR7919235A
Other languages
French (fr)
Other versions
FR2433581B1 (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 FR2433581A1 publication Critical patent/FR2433581A1/en
Application granted granted Critical
Publication of FR2433581B1 publication Critical patent/FR2433581B1/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
    • 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
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • 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
    • C21C7/06—Deoxidising, e.g. killing

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

The deoxidation, desulphurisation and refining of steel in a casting vessel involves the injection of Al, an alkaline-earth and of other powder products into a vessel provided with a basic lining. Before the metal is cast, a predetermined quantity of a fluid basic slag is provided in the base of the vessel, the slag being free of oxides and sulphates and eventually contg. deoxidising and refining agents so that a slag is formed contg. little iron and other oxides, but rich than normal. The process further involves casting the metal while avoiding the arrival of the converter refining slag, stirring the metal and the slag deoxidised by means of argon; and adding Ca alloys in several stages and as near as possible to the base of the vessel. The process (a) reduces the residual quantity of Al in the steel (b) reduces the sulphur content in the steel (c) reduces the quantity of non-metallic inclusions, (d) enables the clean metal with increased castability at a controlled casting temperature.
FR7919235A 1978-07-27 1979-07-19 Deoxidising, desulphurising and refining steel - by means of a liquid slag and aluminium additions Granted FR2433581A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE869298 1978-07-27

Publications (2)

Publication Number Publication Date
FR2433581A1 true FR2433581A1 (en) 1980-03-14
FR2433581B1 FR2433581B1 (en) 1984-05-04

Family

ID=3861688

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7919235A Granted FR2433581A1 (en) 1978-07-27 1979-07-19 Deoxidising, desulphurising and refining steel - by means of a liquid slag and aluminium additions

Country Status (1)

Country Link
FR (1) FR2433581A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2034736A1 (en) * 1969-03-07 1970-12-11 Nippon Kokan Kk
FR2051745A1 (en) * 1969-07-15 1971-04-09 Asea Ab
DE2205206A1 (en) * 1972-02-04 1973-08-16 Finkl & Sons Co Steel desulphurization - effected outside the smelting vessel to maximise refining efficiency
FR2184456A1 (en) * 1972-05-15 1973-12-28 Morival Fernand Killing continuously cast steel - by two phase aluminium injection in a casting ladle using continuous aluminium strip
FR2314787A1 (en) * 1975-06-18 1977-01-14 Thyssen Niederrhein Ag PROCESS FOR THE PRODUCTION OF A STEEL MELT FOR THE CONTINUOUS CASTING PROCESS
DE2545340A1 (en) * 1975-10-09 1977-04-14 Sumitomo Metal Ind Desulphurisation of basic converter steel - in the ladle by addn. of a granular mixt. of lime, aluminium oxide and calcium fluoride

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2034736A1 (en) * 1969-03-07 1970-12-11 Nippon Kokan Kk
FR2051745A1 (en) * 1969-07-15 1971-04-09 Asea Ab
DE2205206A1 (en) * 1972-02-04 1973-08-16 Finkl & Sons Co Steel desulphurization - effected outside the smelting vessel to maximise refining efficiency
FR2184456A1 (en) * 1972-05-15 1973-12-28 Morival Fernand Killing continuously cast steel - by two phase aluminium injection in a casting ladle using continuous aluminium strip
FR2314787A1 (en) * 1975-06-18 1977-01-14 Thyssen Niederrhein Ag PROCESS FOR THE PRODUCTION OF A STEEL MELT FOR THE CONTINUOUS CASTING PROCESS
DE2545340A1 (en) * 1975-10-09 1977-04-14 Sumitomo Metal Ind Desulphurisation of basic converter steel - in the ladle by addn. of a granular mixt. of lime, aluminium oxide and calcium fluoride

Also Published As

Publication number Publication date
FR2433581B1 (en) 1984-05-04

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ST Notification of lapse