GB1007051A - Method for nitrogen-enrichment of molten steel covered with slag - Google Patents

Method for nitrogen-enrichment of molten steel covered with slag

Info

Publication number
GB1007051A
GB1007051A GB18062/63A GB1806263A GB1007051A GB 1007051 A GB1007051 A GB 1007051A GB 18062/63 A GB18062/63 A GB 18062/63A GB 1806263 A GB1806263 A GB 1806263A GB 1007051 A GB1007051 A GB 1007051A
Authority
GB
United Kingdom
Prior art keywords
nitrogen
slag
carbon
mixture
metal
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
GB18062/63A
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.)
IHI Corp
Original Assignee
IHI 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 IHI Corp filed Critical IHI Corp
Publication of GB1007051A publication Critical patent/GB1007051A/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
    • C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material
    • 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
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C21C5/4613—Refractory coated lances; Immersion lances
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting

Landscapes

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

Abstract

Molten steel is enriched with nitrogen by blowing into the lower part of the covering slag layer either calcium cyanamide or a nitride which decomposes at high temperature to yield nitrogen, or a mixture of carbon with any of the above compounds, the addition being blown in a stream of nitrogen, or a gas inert to both metal and slag, or a mixture of nitrogen and such gas, under such conditions that nascent nitrogen is liberated by decomposition at the slag-metal interface. If calcium cyanamide is used, the calcium and carbon liberated serve to deoxidize the steel and slag, the resultant carbon monoxide having a beneficial stirring effect. When the addition agent is free of carbon it is desirable to agitate the bath independently, as by blowing with a further stream of nitrogen, a gas inert to both metal and slag, or a mixture thereof. The process may be carried out in an open-hearth or arc furnace, or a top-blown converter.
GB18062/63A 1962-05-11 1963-05-07 Method for nitrogen-enrichment of molten steel covered with slag Expired GB1007051A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1857762 1962-05-11

Publications (1)

Publication Number Publication Date
GB1007051A true GB1007051A (en) 1965-10-13

Family

ID=11975459

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18062/63A Expired GB1007051A (en) 1962-05-11 1963-05-07 Method for nitrogen-enrichment of molten steel covered with slag

Country Status (2)

Country Link
US (1) US3230075A (en)
GB (1) GB1007051A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0316920A1 (en) * 1987-11-19 1989-05-24 SKW Trostberg Aktiengesellschaft Nitrogen containing additive for molten steel
CZ298889B6 (en) * 2004-07-23 2008-03-05 Trinecké železárny a. s. Process for producing steels with guaranteed amount of nitrogen

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3980283A (en) * 1971-02-16 1976-09-14 Gesellschaft Zur Forderung Der Eisenhuttentechnik Mbh Apparatus for performing a continuous metallurgical refining process
US4081270A (en) * 1977-04-11 1978-03-28 Union Carbide Corporation Renitrogenation of basic-oxygen steels during decarburization
BG27648A1 (en) * 1978-02-27 1979-12-12 Nikolov Apparatus for nitriding metal materials and ferroalloys under pressure
US4394161A (en) * 1982-06-28 1983-07-19 Union Carbide Corporation Method of producing a vanadium- and nitrogen-containing material for use as an addition to steel
US4588170A (en) * 1985-09-06 1986-05-13 Insul Company, Inc. Side mounted lance for ladles
US4740241A (en) * 1987-05-22 1988-04-26 Labate M D Dual action lance for ladles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA525814A (en) * 1956-06-05 W. Kaiser Donald Steel process
US2537103A (en) * 1946-03-19 1951-01-09 Armco Steel Corp Production of nitrogen-bearing stainless steel
US2918365A (en) * 1953-08-10 1959-12-22 Yawata Seitetsu K K Method for controlling compositions of molten pig iron and slag in a blast furnace

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0316920A1 (en) * 1987-11-19 1989-05-24 SKW Trostberg Aktiengesellschaft Nitrogen containing additive for molten steel
US4897114A (en) * 1987-11-19 1990-01-30 Skw Trostberg Aktiengesellschaft Nitrogen-containing additive for steel melts
CZ298889B6 (en) * 2004-07-23 2008-03-05 Trinecké železárny a. s. Process for producing steels with guaranteed amount of nitrogen

Also Published As

Publication number Publication date
US3230075A (en) 1966-01-18

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