GB1021855A - Improvements in or relating to the treatment of molten metal - Google Patents

Improvements in or relating to the treatment of molten metal

Info

Publication number
GB1021855A
GB1021855A GB335063A GB335063A GB1021855A GB 1021855 A GB1021855 A GB 1021855A GB 335063 A GB335063 A GB 335063A GB 335063 A GB335063 A GB 335063A GB 1021855 A GB1021855 A GB 1021855A
Authority
GB
United Kingdom
Prior art keywords
stream
gas
gas stream
high velocity
streams
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
GB335063A
Inventor
Leslie Cook
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.)
BOC Group Ltd
Original Assignee
British Oxigen Ltd
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 British Oxigen Ltd filed Critical British Oxigen Ltd
Priority to GB335063A priority Critical patent/GB1021855A/en
Publication of GB1021855A publication Critical patent/GB1021855A/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
    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/32—Blowing from above
    • 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

Landscapes

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

Abstract

<PICT:1021855/C6-C7/1> A process for the treatment of molten metal by blowing from above with a low velocity gas stream containing a powdered or granulated material in suspension therein and also with a high velocity gas stream, wherein said high velocity gas stream is surrounded by an annular curtain of gas formed by either a further stream of gas having an annular cross-section surrounding said high velocity gas stream or by a plurality of further streams of gas arranged in a circle around said high velocity gas stream, said further stream or streams having a lower velocity than that of said high velocity gas stream, and said annular curtain of gas diverging outwardly at an angle to the axis of said high velocity gas stream. The volume of said further stream or streams is preferably less than that of the high velocity stream, e.g. the further stream or streams forming 20-30% of the total volume of gas flow and the high velocity stream forming 50-60% thereof. In the form shown the low pressure gas carrying the powder passes through the centre tube 10, and the high pressure gas passes between the concentric tubes, 10 and 11, to pass through the annular opening 17 so forming the high pressure gas stream and also through the series of apertures 18 surrounding the annular opening thereby producing the curtain of gas surrounding the high pressure gas stream. The gas streams may comprise such gases as oxygen, enriched air, oxygen-steam or oxygen-carbon dioxide mixtures &c. The high-velocity gas stream may issue from the lance at supersonic velocities.
GB335063A 1963-01-26 1963-01-26 Improvements in or relating to the treatment of molten metal Expired GB1021855A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB335063A GB1021855A (en) 1963-01-26 1963-01-26 Improvements in or relating to the treatment of molten metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB335063A GB1021855A (en) 1963-01-26 1963-01-26 Improvements in or relating to the treatment of molten metal

Publications (1)

Publication Number Publication Date
GB1021855A true GB1021855A (en) 1966-03-09

Family

ID=9756659

Family Applications (1)

Application Number Title Priority Date Filing Date
GB335063A Expired GB1021855A (en) 1963-01-26 1963-01-26 Improvements in or relating to the treatment of molten metal

Country Status (1)

Country Link
GB (1) GB1021855A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2519024A1 (en) * 1981-12-25 1983-07-01 Sumitomo Metal Ind LANCE FOR POWDER BLOWING AFFINATION ABOVE A MOLTEN METAL BATH AND METHOD FOR DECARBURING AND REFINING STEEL WITH SUCH A LANCE
FR2797738A1 (en) * 1999-08-18 2001-02-23 Air Liquide Electric arc furnace supersonic gas injection process, especially for oxygen injection into a steel-making arc furnace, uses a surrounding gas jet to protect the supersonic gas jet against the ambient atmosphere
EP1132684A3 (en) * 2000-03-10 2002-05-02 L'air Liquide, S.A. à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés Georges Claude Method and system for lancing gas into an environment with variable entrainment of non-lanced gas
EP1431402A1 (en) * 2001-12-11 2004-06-23 CENTRO SVILUPPO MATERIALI S.p.A. Device apt to feed powdered substances onto a metal-slag bath surface and use thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2519024A1 (en) * 1981-12-25 1983-07-01 Sumitomo Metal Ind LANCE FOR POWDER BLOWING AFFINATION ABOVE A MOLTEN METAL BATH AND METHOD FOR DECARBURING AND REFINING STEEL WITH SUCH A LANCE
FR2797738A1 (en) * 1999-08-18 2001-02-23 Air Liquide Electric arc furnace supersonic gas injection process, especially for oxygen injection into a steel-making arc furnace, uses a surrounding gas jet to protect the supersonic gas jet against the ambient atmosphere
EP1132684A3 (en) * 2000-03-10 2002-05-02 L'air Liquide, S.A. à Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procédés Georges Claude Method and system for lancing gas into an environment with variable entrainment of non-lanced gas
EP1431402A1 (en) * 2001-12-11 2004-06-23 CENTRO SVILUPPO MATERIALI S.p.A. Device apt to feed powdered substances onto a metal-slag bath surface and use thereof

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