JPS5620114A - Desulfurization accelerating method in oxygen top blowing converter steel making method - Google Patents

Desulfurization accelerating method in oxygen top blowing converter steel making method

Info

Publication number
JPS5620114A
JPS5620114A JP9603179A JP9603179A JPS5620114A JP S5620114 A JPS5620114 A JP S5620114A JP 9603179 A JP9603179 A JP 9603179A JP 9603179 A JP9603179 A JP 9603179A JP S5620114 A JPS5620114 A JP S5620114A
Authority
JP
Japan
Prior art keywords
cao
basicity
molten slag
slag
molten
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
JP9603179A
Other languages
Japanese (ja)
Inventor
Kazuo Ogahira
Masazumi Hirai
Hiroshi Iida
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 JP9603179A priority Critical patent/JPS5620114A/en
Publication of JPS5620114A publication Critical patent/JPS5620114A/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

Abstract

PURPOSE: To accelerate dephosphorization and desulfurization reaction at small T and Fe amounts in slag by making the basicity of the slag ≥2.3 and employing a synthetic flux of CaO-FemOn base for part of CaO as a slagging agent, at the time of performing steel making refining with an oxygen top blowing converter having a bottom blowing function.
CONSTITUTION: At the time of performing decarbonization and refining by oxygen blowing from molten scraps, etc. in an oxygen top blowing converter provided with bottom blowing lances, the basicity of molten slag is held at ≥2.3. At this time, CaO is used for the slagging agent of this basic molten slag in such a range in which the basicity becomes about 2.0 and a calcium ferrite base synthetic flux having the form of CaO-FemOn is used as a slagging agent for forming the remaining basicity. The molten slag in which the activity of CaO in the molten slag is large and the FeO activity of 6W15% as T, Fe is small is formed. The oxidation slagging of P and the superior dusulfurization reaction by high basicity molten slag of small FeO activity are accomplished by the agitation and contact of the molten metal and the molten slag by bottom blowing.
COPYRIGHT: (C)1981,JPO&Japio
JP9603179A 1979-07-30 1979-07-30 Desulfurization accelerating method in oxygen top blowing converter steel making method Pending JPS5620114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9603179A JPS5620114A (en) 1979-07-30 1979-07-30 Desulfurization accelerating method in oxygen top blowing converter steel making method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9603179A JPS5620114A (en) 1979-07-30 1979-07-30 Desulfurization accelerating method in oxygen top blowing converter steel making method

Publications (1)

Publication Number Publication Date
JPS5620114A true JPS5620114A (en) 1981-02-25

Family

ID=14154040

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9603179A Pending JPS5620114A (en) 1979-07-30 1979-07-30 Desulfurization accelerating method in oxygen top blowing converter steel making method

Country Status (1)

Country Link
JP (1) JPS5620114A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008046452A1 (en) * 2006-10-20 2008-04-24 Arcelormittal Bremen Gmbh Calcium ferrite sinter, production thereof, and use of same
CN103555879A (en) * 2013-10-21 2014-02-05 莱芜钢铁集团有限公司 Control method for reducing total iron content of SPHC (steel plate heat commercial) final slag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008046452A1 (en) * 2006-10-20 2008-04-24 Arcelormittal Bremen Gmbh Calcium ferrite sinter, production thereof, and use of same
CN103555879A (en) * 2013-10-21 2014-02-05 莱芜钢铁集团有限公司 Control method for reducing total iron content of SPHC (steel plate heat commercial) final slag

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