JPS5576013A - Al adding method to molten steel - Google Patents

Al adding method to molten steel

Info

Publication number
JPS5576013A
JPS5576013A JP15129178A JP15129178A JPS5576013A JP S5576013 A JPS5576013 A JP S5576013A JP 15129178 A JP15129178 A JP 15129178A JP 15129178 A JP15129178 A JP 15129178A JP S5576013 A JPS5576013 A JP S5576013A
Authority
JP
Japan
Prior art keywords
molten steel
molten
inert gas
basicity
ladle
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
JP15129178A
Other languages
Japanese (ja)
Other versions
JPS5725608B2 (en
Inventor
Toshiyasu Onishi
Koichi Ebato
Kunio Ishimitsu
Tatsuo Ikeda
Kiyoharu Akiizumi
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP15129178A priority Critical patent/JPS5576013A/en
Publication of JPS5576013A publication Critical patent/JPS5576013A/en
Publication of JPS5725608B2 publication Critical patent/JPS5725608B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE: To improve the yield of Al and make the floating of Al2O as deoxidation product easy by making the basicity of molten slag 2.5 or more in an inert gas atmosphere and blowing Al powder directly into molten steel with a lance by inert gas at the time of adding Al into the molten steel in a ladle.
CONSTITUTION: Molten steel A is put in a ladle 1 which is then put on with a cover 3. The inside of the ladle is made of inert gas atmosphere and the basicity of molten slag B is controlled to 2.5 or more. Inert gas such as Ar is blown into the molten steel Al with a lance 2 through conduit 5 and at the same time powder-form Al is blown into the molten steel by Ar at ratios of 10W30kg/min. Since Al directly enters the inside of the molten steel A without making contact with air and molten slag B, de-oxidation action is accomplished at a high yield and it melts and remains in the molten steel with less variations within a range of 0.018W0.03%. The molten slag B is of 2.5 or more in basicity and the oxidation of Al from the molten steel at the interface is less. In addition, the Al2O3 of the deoxidation product is rapidly floated by bubbling of Ar gas and enters the inside of the molten slag B, whereby the molten steel is clarified.
COPYRIGHT: (C)1980,JPO&Japio
JP15129178A 1978-12-05 1978-12-05 Al adding method to molten steel Granted JPS5576013A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15129178A JPS5576013A (en) 1978-12-05 1978-12-05 Al adding method to molten steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15129178A JPS5576013A (en) 1978-12-05 1978-12-05 Al adding method to molten steel

Publications (2)

Publication Number Publication Date
JPS5576013A true JPS5576013A (en) 1980-06-07
JPS5725608B2 JPS5725608B2 (en) 1982-05-31

Family

ID=15515463

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15129178A Granted JPS5576013A (en) 1978-12-05 1978-12-05 Al adding method to molten steel

Country Status (1)

Country Link
JP (1) JPS5576013A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02194113A (en) * 1989-01-23 1990-07-31 Kawasaki Steel Corp Method for reforming molten steel slag
JPH0310013A (en) * 1989-01-23 1991-01-17 Kawasaki Steel Corp Method for reforming slag on molten steel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61163504U (en) * 1985-03-30 1986-10-09

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112321A (en) * 1974-07-23 1976-01-30 Nippon Steel Corp Teisansokono seizohoho

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112321A (en) * 1974-07-23 1976-01-30 Nippon Steel Corp Teisansokono seizohoho

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02194113A (en) * 1989-01-23 1990-07-31 Kawasaki Steel Corp Method for reforming molten steel slag
JPH0310013A (en) * 1989-01-23 1991-01-17 Kawasaki Steel Corp Method for reforming slag on molten steel

Also Published As

Publication number Publication date
JPS5725608B2 (en) 1982-05-31

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