JPS56146812A - Refining method for molten steel - Google Patents

Refining method for molten steel

Info

Publication number
JPS56146812A
JPS56146812A JP4826680A JP4826680A JPS56146812A JP S56146812 A JPS56146812 A JP S56146812A JP 4826680 A JP4826680 A JP 4826680A JP 4826680 A JP4826680 A JP 4826680A JP S56146812 A JPS56146812 A JP S56146812A
Authority
JP
Japan
Prior art keywords
steel
ladle
slag
cao
sio
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
JP4826680A
Other languages
Japanese (ja)
Other versions
JPS6037845B2 (en
Inventor
Kiyomi Taguchi
Masayuki Hanmiyo
Masaru Ishikawa
Haruyoshi Tanabe
Kenzo Yamada
Tsutomu Usui
Yoshio Miyashita
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 JP55048266A priority Critical patent/JPS6037845B2/en
Publication of JPS56146812A publication Critical patent/JPS56146812A/en
Publication of JPS6037845B2 publication Critical patent/JPS6037845B2/en
Expired legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE: To manufacture high-grade steel with low S and O2 contents by pouring molten steel into a tightly sealed ladle, heating it with an electrode in the presence of molten slag having a specified composition, charging lime, and blowing an inert gas to agitate the molten steel.
CONSTITUTION: Molten steel 3 is poured into ladle 2 sealed with ladle cover 2a and sealant 9, and synthetic slag contg. 46% CaO and 49% SiO2 in 1W1.5 ratio of CaO to SiO2 is prepared. Electrode 7 for heating is dipped in molten slag 4 and supplied with electric current to heat steel 3 by resistance heat and raise the temp. At this time, the refractories of ladle 2 are hardly damaged by melting since the ratio of CaO to SiO2 of slag 4 is 1W1.5. Lime is then charged from hopper 6, and an inert gas such as Ar is blown through lance 8 to agitate steel 3. By further blowing an inert gas through gas feed pipe 5 to adjust the O2 content of the internal atmosphere of ladle 2 to ≤1%, steel 3 is refined to high-grade clean steel with low S and O2 contents.
COPYRIGHT: (C)1981,JPO&Japio
JP55048266A 1980-04-12 1980-04-12 Molten steel refining method Expired JPS6037845B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55048266A JPS6037845B2 (en) 1980-04-12 1980-04-12 Molten steel refining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55048266A JPS6037845B2 (en) 1980-04-12 1980-04-12 Molten steel refining method

Publications (2)

Publication Number Publication Date
JPS56146812A true JPS56146812A (en) 1981-11-14
JPS6037845B2 JPS6037845B2 (en) 1985-08-28

Family

ID=12798628

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55048266A Expired JPS6037845B2 (en) 1980-04-12 1980-04-12 Molten steel refining method

Country Status (1)

Country Link
JP (1) JPS6037845B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6164811A (en) * 1984-09-03 1986-04-03 Nippon Kokan Kk <Nkk> Desulfurizing method of molten steel
JPS6184313A (en) * 1984-09-28 1986-04-28 Nippon Kokan Kk <Nkk> Method for refining molten steel by arc process

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5223968A (en) * 1975-08-18 1977-02-23 Seiko Instr & Electronics Ltd Digital alarm watch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5223968A (en) * 1975-08-18 1977-02-23 Seiko Instr & Electronics Ltd Digital alarm watch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6164811A (en) * 1984-09-03 1986-04-03 Nippon Kokan Kk <Nkk> Desulfurizing method of molten steel
JPH0245686B2 (en) * 1984-09-03 1990-10-11 Nippon Kokan Kk
JPS6184313A (en) * 1984-09-28 1986-04-28 Nippon Kokan Kk <Nkk> Method for refining molten steel by arc process

Also Published As

Publication number Publication date
JPS6037845B2 (en) 1985-08-28

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