GB872224A - Improvements in or relating to methods of refining crude iron - Google Patents

Improvements in or relating to methods of refining crude iron

Info

Publication number
GB872224A
GB872224A GB25978/57A GB2597857A GB872224A GB 872224 A GB872224 A GB 872224A GB 25978/57 A GB25978/57 A GB 25978/57A GB 2597857 A GB2597857 A GB 2597857A GB 872224 A GB872224 A GB 872224A
Authority
GB
United Kingdom
Prior art keywords
slag
iron
blowing
contact
relating
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
GB25978/57A
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.)
BOT Brassert Oxygen Technik AG
Original Assignee
BOT Brassert Oxygen Technik AG
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 BOT Brassert Oxygen Technik AG filed Critical BOT Brassert Oxygen Technik AG
Publication of GB872224A publication Critical patent/GB872224A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

Pig iron is refined by the conventional surface blowing process modified in that when the carbon content of the bath reaches 2-0.8% the iron content of the slag is increased by at least 50% and preferably by 200% by the addition of iron oxide, allowing the reactive slag so formed to remain in contact with the bath to extract at least the major portion of the phosphorus, removing the slag, and continuing blowing until the desired carbon content is reached. The iron oxide may be added in the form of scarfing scale, iron ore, or a combination thereof. After deslagging, a fresh slag may be formed and blowing continued using a reduced oxygen pressure to lower the rate of combustion of carbon. It is stated that the contact between the relatively cool slag and hot metal favours the dephosphorization reaction.
GB25978/57A 1957-05-10 1957-08-16 Improvements in or relating to methods of refining crude iron Expired GB872224A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT872224X 1957-05-10

Publications (1)

Publication Number Publication Date
GB872224A true GB872224A (en) 1961-07-05

Family

ID=3682537

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25978/57A Expired GB872224A (en) 1957-05-10 1957-08-16 Improvements in or relating to methods of refining crude iron

Country Status (1)

Country Link
GB (1) GB872224A (en)

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