GB1314889A - Process for manufacturing high-grade steel - Google Patents

Process for manufacturing high-grade steel

Info

Publication number
GB1314889A
GB1314889A GB3405270A GB3405270A GB1314889A GB 1314889 A GB1314889 A GB 1314889A GB 3405270 A GB3405270 A GB 3405270A GB 3405270 A GB3405270 A GB 3405270A GB 1314889 A GB1314889 A GB 1314889A
Authority
GB
United Kingdom
Prior art keywords
calcium
added
desulphurizing
melt
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.)
Expired
Application number
GB3405270A
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska AB
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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of GB1314889A publication Critical patent/GB1314889A/en
Expired 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
    • C21C7/06—Deoxidising, e.g. killing
    • 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
    • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
    • 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
    • C21C7/10—Handling in a vacuum

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

1314889 Desulphurizing steel ALLM€NNA SVENGKA ELEKTRISKA A B 14 July 1970 [15 July 1969] 34052/07 Heading C7D A deoxidized steel melt weighing more than 1 ton is desulphurized in a vessel having a lining which prevents oxygen from leaking into the melt and which is basic at least at the slag line. At least one basic slag forming agent is added to form a desulphurizing slag and the melt is kept deonidized throughout the desulphurizing process by vacuum degassing and/or by adddition of a deonidizing agent and is subjected to vigourous heating and stirring. A desulphurizing agent such as misch metal, calcium, silicon-calcium or aluminium-calcium may be added to the melt. Lime may be added in amount 0À2-2À0% by weight of the total charge, misch metal up to 1À0%, calcium or an alloy thereof to add up to 0À5% of calcium or magnesium or an alloy thereof to add up to 0À5% of magnesium may be used. Aluminium with or without a fluxing agent such as fluorspar may be added to the slag.
GB3405270A 1969-07-15 1970-07-14 Process for manufacturing high-grade steel Expired GB1314889A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE997469A SE341412B (en) 1969-07-15 1969-07-15

Publications (1)

Publication Number Publication Date
GB1314889A true GB1314889A (en) 1973-04-26

Family

ID=20277938

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3405270A Expired GB1314889A (en) 1969-07-15 1970-07-14 Process for manufacturing high-grade steel

Country Status (6)

Country Link
JP (1) JPS512411B1 (en)
BE (1) BE752728A (en)
DE (1) DE2032845B2 (en)
FR (1) FR2051745B1 (en)
GB (1) GB1314889A (en)
SE (1) SE341412B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2205206A1 (en) * 1972-02-04 1973-08-16 Finkl & Sons Co Steel desulphurization - effected outside the smelting vessel to maximise refining efficiency
CA1069314A (en) * 1974-09-20 1980-01-08 Sumitomo Metal Industries, Ltd. Process for the addition of calcium to molten steel
US3960616A (en) * 1975-06-19 1976-06-01 Armco Steel Corporation Rare earth metal treated cold rolled, non-oriented silicon steel and method of making it
IT1047585B (en) * 1975-09-26 1980-10-20 Centro Speriment Metallurg PERFECTION FOR DEOXIDATION AND DESULFURATION OF STEEL
DE2646437A1 (en) * 1975-10-17 1977-04-21 Finkl & Sons Co METHOD AND DEVICE FOR DESULFURIZING A STEEL MELTING BATH
FR2396087A1 (en) * 1977-09-02 1979-01-26 Tscherna Metalurgia Electrochemically refining iron-based alloys in ladle - by applying a DC arc using submerged anode
DE2756201C3 (en) * 1977-10-03 1981-03-26 Molycorp, Inc., White Plains, N.Y. Process for the desulfurization of flowable materials
FR2407985A1 (en) * 1977-11-04 1979-06-01 Molycorp Inc Desulphurisation of molten iron and steel or stack gases - using rare earth oxide under deoxidising conditions
FR2433581A1 (en) * 1978-07-27 1980-03-14 Morival Fernand Deoxidising, desulphurising and refining steel - by means of a liquid slag and aluminium additions
USRE31676E (en) 1982-09-29 1984-09-18 Thyssen Aktiengesellschaft vorm August Thyssen-Hutte AG Method and apparatus for dispensing a fluidizable solid from a pressure vessel
LU84472A1 (en) * 1982-11-17 1984-06-13 Arbed PROCESS AND PLANT FOR THE TREATMENT OF POCKET STEEL

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR384599A (en) *
FR1376281A (en) * 1963-12-04 1964-10-23 Westinghouse Electric Corp Purification of alloys
FR1425560A (en) * 1963-12-20 1966-01-24 Republic Steel Corp Process and plant for producing steel with low gas content

Also Published As

Publication number Publication date
JPS512411B1 (en) 1976-01-26
DE2032845A1 (en) 1971-02-04
SE341412B (en) 1971-12-27
FR2051745B1 (en) 1974-05-03
FR2051745A1 (en) 1971-04-09
BE752728A (en) 1970-12-01
DE2032845B2 (en) 1975-05-28

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee