JPS55125216A - Converter blowing method for controlling phosphorus content - Google Patents

Converter blowing method for controlling phosphorus content

Info

Publication number
JPS55125216A
JPS55125216A JP3128379A JP3128379A JPS55125216A JP S55125216 A JPS55125216 A JP S55125216A JP 3128379 A JP3128379 A JP 3128379A JP 3128379 A JP3128379 A JP 3128379A JP S55125216 A JPS55125216 A JP S55125216A
Authority
JP
Japan
Prior art keywords
slag
feo
blowing
molten steel
converter
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.)
Pending
Application number
JP3128379A
Other languages
Japanese (ja)
Inventor
Takeshi Katogi
Kiyoshi Ichihara
Masayoshi Yokoyama
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP3128379A priority Critical patent/JPS55125216A/en
Publication of JPS55125216A publication Critical patent/JPS55125216A/en
Pending 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)

Abstract

PURPOSE:To provide dephosphorization effect by estimating the FeO amount in slag through application of the solidifying temperature of the slag sampled from the molten steel surface in a converter to a CaO-FeO-SiO2 3-component-system phase diagram and controlling blow from this estimated value. CONSTITUTION:The slag floating on the molten steel surface in the converter is sampled without interrupting blowing, its solidifying temperature is measured and this solidifying temperature is applied to the CaO-FeO-SiO2 3-component phase diagram of Fig. A. The FeO% in the slag thus obtained is converted to the P% in the melting by Fig. B. Namely, if the estimated P% in the molten steel coincides with the P% of steel kind being the object of blowing, the blowing is continued as it is. If this estimated value is higher than the target value, the degree of blow is changed over to soft so as to promote desulphurization so that the disintegration of slag is accelerated.
JP3128379A 1979-03-17 1979-03-17 Converter blowing method for controlling phosphorus content Pending JPS55125216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3128379A JPS55125216A (en) 1979-03-17 1979-03-17 Converter blowing method for controlling phosphorus content

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3128379A JPS55125216A (en) 1979-03-17 1979-03-17 Converter blowing method for controlling phosphorus content

Publications (1)

Publication Number Publication Date
JPS55125216A true JPS55125216A (en) 1980-09-26

Family

ID=12326980

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3128379A Pending JPS55125216A (en) 1979-03-17 1979-03-17 Converter blowing method for controlling phosphorus content

Country Status (1)

Country Link
JP (1) JPS55125216A (en)

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