JPS54158319A - Manufacture of medium carbon molten ferrochromium - Google Patents

Manufacture of medium carbon molten ferrochromium

Info

Publication number
JPS54158319A
JPS54158319A JP6693878A JP6693878A JPS54158319A JP S54158319 A JPS54158319 A JP S54158319A JP 6693878 A JP6693878 A JP 6693878A JP 6693878 A JP6693878 A JP 6693878A JP S54158319 A JPS54158319 A JP S54158319A
Authority
JP
Japan
Prior art keywords
molten steel
ferrochromium
temp
charged
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.)
Granted
Application number
JP6693878A
Other languages
Japanese (ja)
Other versions
JPS6123244B2 (en
Inventor
Hiroshi Soga
Tsutomu Saito
Takafumi Kawamura
Hiroyuki Ogawa
Hiroyuki Katayama
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 JP6693878A priority Critical patent/JPS54158319A/en
Publication of JPS54158319A publication Critical patent/JPS54158319A/en
Publication of JPS6123244B2 publication Critical patent/JPS6123244B2/ja
Granted 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

  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE: To efficiently refine medium carbon ferrochromium for manufacture of stainless steel without damaging refractories of a bottom blowing converter type smelting furnace and lowering Cr yield by adding high carbon ferrochromium to molten steel charged into the furnace and by melting the ferrochromium while controlling the temp. and carbon content of the molten metal to specified values.
CONSTITUTION: Molten steel is charged into converter type smelting furnace 1 provided with tuyere 2 at the bottom. High carbon ferrochromium 6 is preheated with furnace exhaust gas in shoot 5 and charged together with scrap stainless steel, a Ni source and a slag making agent such as lime. At this time, the molten steel is predecarburized to C; 0.8W4.2% by blowing a mixed gas of oxygen and nitrogen from tuyere 2. The temp. of the molten metal is regulated to the range of [Cr%]+ 1410W1620°C ([Cr%]; the Cr% of the molten steel). When the molten steel is cooled with the additives, fuel is burned with burner 3 to raise the temp. The resulting medium carbon, Cr-contg. molten steel is refined to stainless steel contg. C<0.10% by vacuum decarburization or the like.
COPYRIGHT: (C)1979,JPO&Japio
JP6693878A 1978-06-03 1978-06-03 Manufacture of medium carbon molten ferrochromium Granted JPS54158319A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6693878A JPS54158319A (en) 1978-06-03 1978-06-03 Manufacture of medium carbon molten ferrochromium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6693878A JPS54158319A (en) 1978-06-03 1978-06-03 Manufacture of medium carbon molten ferrochromium

Publications (2)

Publication Number Publication Date
JPS54158319A true JPS54158319A (en) 1979-12-14
JPS6123244B2 JPS6123244B2 (en) 1986-06-05

Family

ID=13330436

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6693878A Granted JPS54158319A (en) 1978-06-03 1978-06-03 Manufacture of medium carbon molten ferrochromium

Country Status (1)

Country Link
JP (1) JPS54158319A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5938320A (en) * 1982-08-28 1984-03-02 Kawasaki Steel Corp Method for mixing molten metal to refine high alloy steel
JP2007063581A (en) * 2005-08-29 2007-03-15 Nippon Steel Corp Method for refining molten chromium-containing steel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5938320A (en) * 1982-08-28 1984-03-02 Kawasaki Steel Corp Method for mixing molten metal to refine high alloy steel
JPS6223043B2 (en) * 1982-08-28 1987-05-21 Kawasaki Steel Co
JP2007063581A (en) * 2005-08-29 2007-03-15 Nippon Steel Corp Method for refining molten chromium-containing steel

Also Published As

Publication number Publication date
JPS6123244B2 (en) 1986-06-05

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