JPS57137413A - Production of molten steel containing nitrogen - Google Patents

Production of molten steel containing nitrogen

Info

Publication number
JPS57137413A
JPS57137413A JP2415581A JP2415581A JPS57137413A JP S57137413 A JPS57137413 A JP S57137413A JP 2415581 A JP2415581 A JP 2415581A JP 2415581 A JP2415581 A JP 2415581A JP S57137413 A JPS57137413 A JP S57137413A
Authority
JP
Japan
Prior art keywords
lance
molten steel
gaseous
liquid level
equation
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
JP2415581A
Other languages
Japanese (ja)
Other versions
JPS6354043B2 (en
Inventor
Yoshioki Kamidate
Yuzo Saida
Naoki Shigematsu
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.)
NITSUSHIN SEIKOU KK
Nippon Steel Nisshin Co Ltd
Original Assignee
NITSUSHIN SEIKOU KK
Nisshin Steel Co 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 NITSUSHIN SEIKOU KK, Nisshin Steel Co Ltd filed Critical NITSUSHIN SEIKOU KK
Priority to JP2415581A priority Critical patent/JPS57137413A/en
Publication of JPS57137413A publication Critical patent/JPS57137413A/en
Publication of JPS6354043B2 publication Critical patent/JPS6354043B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0037—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 by injecting powdered material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE:To supply gaseous N2 stably with good hit rates by controlling the discharge rate of the gaseous N2 from an immersion lance and the immersion depth of the lance from the liquid level in a way as to satisfy the relations of the specific equations. CONSTITUTION:A lance is immersed under the liquid level of molten steel from above the liquid level in a vessel, and gaseous N2 is blown into the molten steel through this immersed lance. A prescribed amt. of the N2 is added to the molten steel by such blowing of the gaseous N2, whereby the nitrogen-contg. molten steel is produced. At this time, the discharge velocity V' of the gaseous N2 from the immersed lance and the immersion depth L of the lance from the liquid level are so controlled as to satisfy the relation of the equationI. In the equation, L is a metric unit, V is not the V' itself but is the ratio of the velocity of sound expressed by the equation II. The total area of the discharge hole of the lance in the equation II is the sum total of the areas of plural discharge holes if the lance has the plural discharge holes.
JP2415581A 1981-02-20 1981-02-20 Production of molten steel containing nitrogen Granted JPS57137413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2415581A JPS57137413A (en) 1981-02-20 1981-02-20 Production of molten steel containing nitrogen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2415581A JPS57137413A (en) 1981-02-20 1981-02-20 Production of molten steel containing nitrogen

Publications (2)

Publication Number Publication Date
JPS57137413A true JPS57137413A (en) 1982-08-25
JPS6354043B2 JPS6354043B2 (en) 1988-10-26

Family

ID=12130444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2415581A Granted JPS57137413A (en) 1981-02-20 1981-02-20 Production of molten steel containing nitrogen

Country Status (1)

Country Link
JP (1) JPS57137413A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6191317A (en) * 1984-10-11 1986-05-09 Nippon Kokan Kk <Nkk> Refining method of molten steel by ladle refining furnace
JP2015098635A (en) * 2013-11-20 2015-05-28 株式会社日本製鋼所 Electrode for electroslag re-melting and method of producing high-nitrogen-content steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6191317A (en) * 1984-10-11 1986-05-09 Nippon Kokan Kk <Nkk> Refining method of molten steel by ladle refining furnace
JP2015098635A (en) * 2013-11-20 2015-05-28 株式会社日本製鋼所 Electrode for electroslag re-melting and method of producing high-nitrogen-content steel

Also Published As

Publication number Publication date
JPS6354043B2 (en) 1988-10-26

Similar Documents

Publication Publication Date Title
CA2024466A1 (en) Method of operating in-bath smelting reduction furnace
JPS5687617A (en) Steel making method using arc furnace
ES8101648A1 (en) Converter steelmaking process.
AU9110182A (en) Metal refining using oxygen and powdered carbon
JPS57137413A (en) Production of molten steel containing nitrogen
JPS5716111A (en) Coating method of slag on wall of bottom-blowing converter
CA2017121A1 (en) Process of controlling the slag in a top-blowing steelmaking converter
JPS5757819A (en) Converter steel making method
JPS57137415A (en) Steel making method for chromium-containing steel
JPS5760007A (en) Method for protection of oxygen blowing tuyere into molten iron
JPS5760004A (en) Converter refining method
JPS57137409A (en) Out-of-furnace treatment of molten metal by blowing of refining agent by carrier gas
ES8503723A1 (en) Metallurgical vessel
US4612044A (en) Method of vacuum treating metal melts, and vessel for use in the method
JPS5589416A (en) Preparation of nitrogen containing steel
JPS56123315A (en) Method for controlling blowing in converter
JPS5732314A (en) Lance for oxidation treatment of molten slag
JPS56112411A (en) Blowing method of top-blown converter
JPS5789415A (en) Top and bottom blowing method
JPS55124536A (en) Scale prevention in oxidation tower and device therefor
JPS57185917A (en) Steel making method by converter
GASKELL Kinetics of the desulfurization of molten iron[Progress Report, 1 Mar.- 1 Oct. 1980]
JPS56150119A (en) Stirring method in refining molten iron in vessel
GB831858A (en) Open-hearth steelmaking process
JPS5792115A (en) Dephosphorization method for molten iron