JPS6428317A - Production of silicon killed steel - Google Patents

Production of silicon killed steel

Info

Publication number
JPS6428317A
JPS6428317A JP18360687A JP18360687A JPS6428317A JP S6428317 A JPS6428317 A JP S6428317A JP 18360687 A JP18360687 A JP 18360687A JP 18360687 A JP18360687 A JP 18360687A JP S6428317 A JPS6428317 A JP S6428317A
Authority
JP
Japan
Prior art keywords
steel
molten
molten steel
slag
cao
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
JP18360687A
Other languages
Japanese (ja)
Inventor
Yoshikatsu Furuno
Hiromi Nakamura
Akira Shiroyama
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 JP18360687A priority Critical patent/JPS6428317A/en
Publication of JPS6428317A publication Critical patent/JPS6428317A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To extremely decrease the content of O2 in a silicon killed steel by using CaO-CaF2 molten slag which does not contain SiO2 as the molten slag to be used at the time of tapping a molten steel into a ladle, deoxidizing the same with ferrosilicon, etc., and producing the silicon killed steel. CONSTITUTION:The molten steel 12 tapped from a converter is put into the ladle 11 and while the molten steel is stirred by blowing an inert gas such as Ar into the molten steel 12 by a lance 15, an Si deoxidizing agent such as ferrosilicon is added to the molten steel to deoxidize the steel and to produce the silicon killed steel. A slag forming material consisting of a mixture composed of CaO and CaF2 is charged onto the molten steel 12 in this case to form the molten slag 13 of a CaO system lowered in the melting temp. by CaF2. The molten slag 13 and the molten steel 12 are energized by graphite electrodes 14 and are thereby heated up. The SiO2 formed after the deoxidation of the molten steel by the Si bonds powerfully to the CaO as the SiO2 does not exist in the molten slag 13. The deoxidation reaction of the molten steel by the Si is thus accelerated and the silicon killed steel contg. O2 at an extremely low ratio is produced.
JP18360687A 1987-07-24 1987-07-24 Production of silicon killed steel Pending JPS6428317A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18360687A JPS6428317A (en) 1987-07-24 1987-07-24 Production of silicon killed steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18360687A JPS6428317A (en) 1987-07-24 1987-07-24 Production of silicon killed steel

Publications (1)

Publication Number Publication Date
JPS6428317A true JPS6428317A (en) 1989-01-30

Family

ID=16138740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18360687A Pending JPS6428317A (en) 1987-07-24 1987-07-24 Production of silicon killed steel

Country Status (1)

Country Link
JP (1) JPS6428317A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113502372A (en) * 2021-05-26 2021-10-15 山东鲁丽钢铁有限公司 Rapid white slag making material for 120tLF refining furnace and process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113502372A (en) * 2021-05-26 2021-10-15 山东鲁丽钢铁有限公司 Rapid white slag making material for 120tLF refining furnace and process

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