JPS5789415A - Top and bottom blowing method - Google Patents

Top and bottom blowing method

Info

Publication number
JPS5789415A
JPS5789415A JP16533480A JP16533480A JPS5789415A JP S5789415 A JPS5789415 A JP S5789415A JP 16533480 A JP16533480 A JP 16533480A JP 16533480 A JP16533480 A JP 16533480A JP S5789415 A JPS5789415 A JP S5789415A
Authority
JP
Japan
Prior art keywords
furnace
distance
molten steel
center line
lance nozzle
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
JP16533480A
Other languages
Japanese (ja)
Other versions
JPS6151603B2 (en
Inventor
Akiya Ozeki
Teruyuki Hasegawa
Youichi Nimura
Kenzo Yamada
Tsutomu Usui
Kounoshin Tamura
Toshio Edane
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP16533480A priority Critical patent/JPS5789415A/en
Publication of JPS5789415A publication Critical patent/JPS5789415A/en
Publication of JPS6151603B2 publication Critical patent/JPS6151603B2/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
    • C21C5/35—Blowing from above and through the bath

Abstract

PURPOSE:To promote the slagging of auxiliary raw material, e.g., quick lime, etc., and dephosphorization by peforming a blowing method in which the angle between the center line of the slot of top blowing lance nozzle and the perpendicular line of a molten steel bath face is designated in the top and bottom blowing work. CONSTITUTION:Molten steel 4 is flowed in the direction of arrows by an agitating gas blown from a tuyere 3 provided at the bottom of the furnace, and slag 5 is stayed in the side area of the wall of the furnace 1. And, O2 jet 6 is blown from top lance nozzle A into the furnace in such a way that the angle theta between the center line of the slot 20 of the nozzle A and the gravity line of the molten steel bath face can meet the condition of the formula (where H is the distance from the lower end of the lance nozzle to the surface of the molten steel bath, l is the distance from the crossing point between the extension of the center line of the throat of the lance nozzle and the center line of the lance to the lower end of the lance nozzle, D is the distance from the center of the furnace to the inner wall of the furnace, and d is the distance from the center of the furnace to the tuyere of the furnace). Thus, the O2 jet can be effectively collided against slag 5 and the slagging of auxiliary raw material and dephosphorization can be promoted.
JP16533480A 1980-11-26 1980-11-26 Top and bottom blowing method Granted JPS5789415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16533480A JPS5789415A (en) 1980-11-26 1980-11-26 Top and bottom blowing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16533480A JPS5789415A (en) 1980-11-26 1980-11-26 Top and bottom blowing method

Publications (2)

Publication Number Publication Date
JPS5789415A true JPS5789415A (en) 1982-06-03
JPS6151603B2 JPS6151603B2 (en) 1986-11-10

Family

ID=15810352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16533480A Granted JPS5789415A (en) 1980-11-26 1980-11-26 Top and bottom blowing method

Country Status (1)

Country Link
JP (1) JPS5789415A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0514889Y2 (en) * 1986-05-15 1993-04-20
JPS6334638U (en) * 1986-08-21 1988-03-05
JPH0439313U (en) * 1990-07-27 1992-04-03

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49113714A (en) * 1973-02-12 1974-10-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49113714A (en) * 1973-02-12 1974-10-30

Also Published As

Publication number Publication date
JPS6151603B2 (en) 1986-11-10

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