JPS5798618A - Decarbulizing refining method for molten pig iron that enlarges reserve heat - Google Patents

Decarbulizing refining method for molten pig iron that enlarges reserve heat

Info

Publication number
JPS5798618A
JPS5798618A JP17226280A JP17226280A JPS5798618A JP S5798618 A JPS5798618 A JP S5798618A JP 17226280 A JP17226280 A JP 17226280A JP 17226280 A JP17226280 A JP 17226280A JP S5798618 A JPS5798618 A JP S5798618A
Authority
JP
Japan
Prior art keywords
refining
decarbulizing
pig iron
lance
molten pig
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.)
Granted
Application number
JP17226280A
Other languages
Japanese (ja)
Other versions
JPS6151604B2 (en
Inventor
Satomi Yamamoto
Masae Ishibashi
Yasuhisa Nakamura
Hisashi Matsunaga
Shoki Minami
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
Nippon Steel 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP17226280A priority Critical patent/JPS5798618A/en
Publication of JPS5798618A publication Critical patent/JPS5798618A/en
Publication of JPS6151604B2 publication Critical patent/JPS6151604B2/ja
Granted 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 raise thermal efficiency and to enable increase of compounding ratio of coolant in making slagless decarburization and refining of preliminarily refined molten pig iron by an oxygen converter, by making the height of lance to a specified height and thereby utilizing combustible waste gas effectively. CONSTITUTION:In decarbulizing and refining molten pig iron Si, P, S content of which is reduced in preliminary refining by an oxygen converter, slagless refining is performed by slag of 10kg per 1 ton of molten metal. At this time, the position of the tip of lance is made to a height greater than a half the distance between the surface of molten metal when blowing is not made and the throat of the converter. Gaseous CO generated by decarbulizing reaction is secondarily burnt by oxygen from the lance and the heat is transmitted directly to the surface of steel bath having little slag to raise temperature of the steel bath effectively. Consequently, the quantity of coolant such as steel scrap, iron ore etc. can be increased and steel making cost is reduced.
JP17226280A 1980-12-06 1980-12-06 Decarbulizing refining method for molten pig iron that enlarges reserve heat Granted JPS5798618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17226280A JPS5798618A (en) 1980-12-06 1980-12-06 Decarbulizing refining method for molten pig iron that enlarges reserve heat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17226280A JPS5798618A (en) 1980-12-06 1980-12-06 Decarbulizing refining method for molten pig iron that enlarges reserve heat

Publications (2)

Publication Number Publication Date
JPS5798618A true JPS5798618A (en) 1982-06-18
JPS6151604B2 JPS6151604B2 (en) 1986-11-10

Family

ID=15938630

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17226280A Granted JPS5798618A (en) 1980-12-06 1980-12-06 Decarbulizing refining method for molten pig iron that enlarges reserve heat

Country Status (1)

Country Link
JP (1) JPS5798618A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS613816A (en) * 1984-06-18 1986-01-09 Nippon Steel Corp Production of carbon unsaturated high manganese iron alloy
JPS6126752A (en) * 1984-07-16 1986-02-06 Nippon Steel Corp Manufacture of low-phosphorus and high-manganese iron alloy by melt reduction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS613816A (en) * 1984-06-18 1986-01-09 Nippon Steel Corp Production of carbon unsaturated high manganese iron alloy
JPS6126752A (en) * 1984-07-16 1986-02-06 Nippon Steel Corp Manufacture of low-phosphorus and high-manganese iron alloy by melt reduction

Also Published As

Publication number Publication date
JPS6151604B2 (en) 1986-11-10

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