JPS56169716A - Removal of si from molten pig iron by blowing of oxygen gas - Google Patents

Removal of si from molten pig iron by blowing of oxygen gas

Info

Publication number
JPS56169716A
JPS56169716A JP7325580A JP7325580A JPS56169716A JP S56169716 A JPS56169716 A JP S56169716A JP 7325580 A JP7325580 A JP 7325580A JP 7325580 A JP7325580 A JP 7325580A JP S56169716 A JPS56169716 A JP S56169716A
Authority
JP
Japan
Prior art keywords
molten pig
pig iron
removing treatment
oxygen
treatment
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
JP7325580A
Other languages
Japanese (ja)
Other versions
JPS6142763B2 (en
Inventor
Shingo Sato
Takashi Inoue
Norio Takahashi
Yuji Kawachi
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 JP7325580A priority Critical patent/JPS56169716A/en
Publication of JPS56169716A publication Critical patent/JPS56169716A/en
Publication of JPS6142763B2 publication Critical patent/JPS6142763B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE: To perform effectively Si-removing treatment for molten pig iron by controlling the temperature loss during the Si-removing treatment and also CO reaction in the molten pig iron by static pressure of molten pig by a method wherein more than a specific amount of oxygen is blown directly into the molten pig iron from below its surface.
CONSTITUTION: In the Si-removing preparatory treatment of molten pig iron, 0.03Nm3/min.t.p or more of oxygen is directly blown into the molten pig iron by a lance nozzle, where the oxygen is preferably blown by immersing the lance nozzle to a depth range of 200W1,500mm. Thus, the loss of temperature can be eliminated during the Si-removing treatment, raising the temperature of the molten pig iron after the Si-removing treatment. Also, CO reaction can be suppressed, enabling effective Si-removing treatment for the molten pig iron to be performed. In addition, restrictions on heat and raw materials used in the total steel-making process can also be alleviated.
COPYRIGHT: (C)1981,JPO&Japio
JP7325580A 1980-05-31 1980-05-31 Removal of si from molten pig iron by blowing of oxygen gas Granted JPS56169716A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7325580A JPS56169716A (en) 1980-05-31 1980-05-31 Removal of si from molten pig iron by blowing of oxygen gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7325580A JPS56169716A (en) 1980-05-31 1980-05-31 Removal of si from molten pig iron by blowing of oxygen gas

Publications (2)

Publication Number Publication Date
JPS56169716A true JPS56169716A (en) 1981-12-26
JPS6142763B2 JPS6142763B2 (en) 1986-09-24

Family

ID=13512880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7325580A Granted JPS56169716A (en) 1980-05-31 1980-05-31 Removal of si from molten pig iron by blowing of oxygen gas

Country Status (1)

Country Link
JP (1) JPS56169716A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008266674A (en) * 2007-04-17 2008-11-06 Jfe Steel Kk Method for desiliconizing molten pig iron

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103540708B (en) * 2013-10-14 2015-09-09 北京科技大学 Nano-meter SiO_2 is reclaimed in a kind of molten iron gasification desiliconization 2method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54147116A (en) * 1978-05-12 1979-11-17 Kawasaki Steel Co Pig iron refining in bottom blown converter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54147116A (en) * 1978-05-12 1979-11-17 Kawasaki Steel Co Pig iron refining in bottom blown converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008266674A (en) * 2007-04-17 2008-11-06 Jfe Steel Kk Method for desiliconizing molten pig iron

Also Published As

Publication number Publication date
JPS6142763B2 (en) 1986-09-24

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