JPS5623220A - Molten iron desulfurizing method - Google Patents

Molten iron desulfurizing method

Info

Publication number
JPS5623220A
JPS5623220A JP9827179A JP9827179A JPS5623220A JP S5623220 A JPS5623220 A JP S5623220A JP 9827179 A JP9827179 A JP 9827179A JP 9827179 A JP9827179 A JP 9827179A JP S5623220 A JPS5623220 A JP S5623220A
Authority
JP
Japan
Prior art keywords
molten iron
concentration
cao
powder
al2o3
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
JP9827179A
Other languages
Japanese (ja)
Other versions
JPS6124450B2 (en
Inventor
Toshiharu Mitsuo
Takeshi Shoji
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 JP9827179A priority Critical patent/JPS5623220A/en
Publication of JPS5623220A publication Critical patent/JPS5623220A/en
Publication of JPS6124450B2 publication Critical patent/JPS6124450B2/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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Abstract

PURPOSE:To make possible the desulfurization down to a target S content rapidly with less Al consumption by adding the specific amount of powder Al together with powders of Al2O3 and CaO to molten iron at the time of desulfurizing the molten iron by CaO and CaC2. CONSTITUTION:In the case of desulfurizing and refining molten iron outside the furnace, powder Al is blown together with powder Al2O3 or powder CaO or a mixture of Al2O3 and CaO into the molten iron through an immersion nozzle by using a carrier gas such as N2. In this case, the Al is so added that the Al concentration in the molten iron is expressed by the following formula. Al concentration=(0.01-0.1)X(Si concentration in molten iron)+(0.2-1.0)X(S concentration to be desulfurized). When the Al concentration reaches the above-mentioned concentration, the desulfurizer comprising the mixture of CaC2 and CaO is added to rapidly desulfurize the molten iron down to the target S content.
JP9827179A 1979-08-01 1979-08-01 Molten iron desulfurizing method Granted JPS5623220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9827179A JPS5623220A (en) 1979-08-01 1979-08-01 Molten iron desulfurizing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9827179A JPS5623220A (en) 1979-08-01 1979-08-01 Molten iron desulfurizing method

Publications (2)

Publication Number Publication Date
JPS5623220A true JPS5623220A (en) 1981-03-05
JPS6124450B2 JPS6124450B2 (en) 1986-06-11

Family

ID=14215269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9827179A Granted JPS5623220A (en) 1979-08-01 1979-08-01 Molten iron desulfurizing method

Country Status (1)

Country Link
JP (1) JPS5623220A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61210111A (en) * 1985-03-14 1986-09-18 Nippon Kokan Kk <Nkk> Method for removing sulfur in molten iron in midway of tapping spout
JPS61214233A (en) * 1985-03-20 1986-09-24 Matsushita Electric Ind Co Ltd Servo gain controller
US4614223A (en) * 1982-05-17 1986-09-30 Wilson William G Methods of adding reactive metals to steels being continuously cast
JP2013095978A (en) * 2011-11-02 2013-05-20 Kobe Steel Ltd Refining treatment method using refining agent generating combustible gas

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4614223A (en) * 1982-05-17 1986-09-30 Wilson William G Methods of adding reactive metals to steels being continuously cast
JPS61210111A (en) * 1985-03-14 1986-09-18 Nippon Kokan Kk <Nkk> Method for removing sulfur in molten iron in midway of tapping spout
JPS6319563B2 (en) * 1985-03-14 1988-04-23 Nippon Kokan Kk
JPS61214233A (en) * 1985-03-20 1986-09-24 Matsushita Electric Ind Co Ltd Servo gain controller
JP2013095978A (en) * 2011-11-02 2013-05-20 Kobe Steel Ltd Refining treatment method using refining agent generating combustible gas

Also Published As

Publication number Publication date
JPS6124450B2 (en) 1986-06-11

Similar Documents

Publication Publication Date Title
JPS5770219A (en) Method for dephosphorizing, desulfurizing and denitrifying iron alloy
JPS55110711A (en) Desulfurization of molten pig iron
JPS5623220A (en) Molten iron desulfurizing method
ES444545A1 (en) Method of producing low sulfur steel
ES442650A1 (en) Composition for desulfurizing iron melts
JPS5629611A (en) Simultaneous dephosphorizing desulfurization of blast furnace molten pig iron
JPS5576012A (en) Control method for contained manganese of molten ion for steel making
JPS5597408A (en) Dephosphorization and desulfurization of mixed slag of blast furnace and converter
JPS54121216A (en) Desulfurization of molten iron
JPS5585611A (en) Desulfurizing agent for hot iron at outside of furnace
JPS5747807A (en) Simultaneous dephosphorization and desulfurization method for molten iron
JPS55115908A (en) Desulfurizing method of molten iron
JPS52115717A (en) Desulfurization of steel
JPS5534604A (en) Hot iron treating method
JPS5481113A (en) Process for desulfurizing molten iron outside furnace
JPS5594415A (en) Steel making method of less slag producing amount
JPS5386613A (en) Desulfurizing method for molten pig iron
JPS55122815A (en) Off-furnace blowing desulfurization method to reduce iron content in slag
SU720028A1 (en) Method of steel processing
JPS54100918A (en) Desulfurizing agent
JPS6430625A (en) Method for desulfurizing gas from smelting and reducing furnace
JPS5275608A (en) Desulfurizing agent for pig iron
JPS56166315A (en) Dephosphorizing and desulfurizing method for molten iron
JPS5726112A (en) Treatment of molten iron
JPS6475622A (en) Desulfurizing method in molten steel