JPS56163212A - Ca-treating method of molten steel - Google Patents

Ca-treating method of molten steel

Info

Publication number
JPS56163212A
JPS56163212A JP6522780A JP6522780A JPS56163212A JP S56163212 A JPS56163212 A JP S56163212A JP 6522780 A JP6522780 A JP 6522780A JP 6522780 A JP6522780 A JP 6522780A JP S56163212 A JPS56163212 A JP S56163212A
Authority
JP
Japan
Prior art keywords
molten steel
intermediate vessel
poured
continuously
mns
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
JP6522780A
Other languages
Japanese (ja)
Inventor
Shinobu Miyahara
Isao Sugawara
Shigetaka Uchida
Toshiaki Ishida
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 JP6522780A priority Critical patent/JPS56163212A/en
Publication of JPS56163212A publication Critical patent/JPS56163212A/en
Pending 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)
  • Continuous Casting (AREA)

Abstract

PURPOSE: To perfectly prevent the MnS deposition on the bottom side of a continuously cast slab and obtain a ingot of excellent cleanliness by adding Ca under prescribed addition conditions while measuring the amount of dissolved O2 of the molten steel to be poured into the intermediate vessel between a ladle and a mold.
CONSTITUTION: The molten steel which has beforehand been treated and controlled to T[O]≤0.003%, [S]≤0.002% is poured into the intermediate vessel provided at the intermediate from a ladle up to a mold. The amount of the dissolved O2 in the molten steel poured into the intermediate vessel is continuously or intermittently measured by an ordinary electrochemical measuring method. Thence, Ca or Ca alloy is added continuously or intermittently to the molten steel in this intermediate vessel under the addition conditions determined by the equation based on the results of said measurement. As a result, MnS does not deposit at all in the axial center part on the bottom side of a continuous slab, and harmful acids and sulfide such as Ca type cluster inclusions are extremely few, thus the ingot of excellent cleanliness is obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP6522780A 1980-05-19 1980-05-19 Ca-treating method of molten steel Pending JPS56163212A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6522780A JPS56163212A (en) 1980-05-19 1980-05-19 Ca-treating method of molten steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6522780A JPS56163212A (en) 1980-05-19 1980-05-19 Ca-treating method of molten steel

Publications (1)

Publication Number Publication Date
JPS56163212A true JPS56163212A (en) 1981-12-15

Family

ID=13280814

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6522780A Pending JPS56163212A (en) 1980-05-19 1980-05-19 Ca-treating method of molten steel

Country Status (1)

Country Link
JP (1) JPS56163212A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03183721A (en) * 1989-12-12 1991-08-09 Nippon Steel Corp Calcium treatment of molten steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03183721A (en) * 1989-12-12 1991-08-09 Nippon Steel Corp Calcium treatment of molten steel
JPH0645816B2 (en) * 1989-12-12 1994-06-15 新日本製鐵株式会社 Calcium treatment method for molten steel

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