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JPS5558310A - Treating method of molten iron - Google Patents

Treating method of molten iron

Info

Publication number
JPS5558310A
JPS5558310A JP13003978A JP13003978A JPS5558310A JP S5558310 A JPS5558310 A JP S5558310A JP 13003978 A JP13003978 A JP 13003978A JP 13003978 A JP13003978 A JP 13003978A JP S5558310 A JPS5558310 A JP S5558310A
Authority
JP
Japan
Prior art keywords
molten iron
cao
charged
refining agent
iron oxide
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
JP13003978A
Other languages
Japanese (ja)
Other versions
JPS5711368B2 (en
Inventor
Ryoshi Arima
Kazumasa Umezawa
Norizo Futasugi
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 JP13003978A priority Critical patent/JPS5558310A/en
Priority to US06/085,255 priority patent/US4295882A/en
Priority to CA000338106A priority patent/CA1136421A/en
Priority to BR7906836A priority patent/BR7906836A/en
Priority to AU52082/79A priority patent/AU518874B2/en
Priority to DE2942779A priority patent/DE2942779C2/en
Priority to GB7936945A priority patent/GB2045281B/en
Priority to FR7926431A priority patent/FR2439821A1/en
Priority to BE2/58152A priority patent/BE879594A/en
Publication of JPS5558310A publication Critical patent/JPS5558310A/en
Publication of JPS5711368B2 publication Critical patent/JPS5711368B2/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
    • C21C1/025—Agents used for dephosphorising or desulfurising
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/32—Blowing from above
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/34—Blowing through the bath
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath
    • 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
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56—Manufacture of steel by other methods
    • 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
    • C21C1/04—Removing impurities other than carbon, phosphorus or sulfur

Landscapes

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

Abstract

PURPOSE: To maintain refined slag in a desirable state and let dephosphorization treatment be rapidly effected by changing the specific refining agent and iron oxide into molten iron.
CONSTITUTION: The refining agent comprising adding about 0.2W0.5 part of CaCl2, KCl to 1 pt.wt. of CaO is charged at about 13W30kg/t to the molten iron whose Si content has been reduced to 0.03W0.25%. At the same time, iron oxide is charged at about 15W30kg/t thereto. When this is force stirred, a small amount of refined slag which has been maintained at basicity (CaO/SiO2) 3.5W8, T, Fe amounts 5W15% is stably formed. This method lets dephosphorization reaction be progressed in good working environments.
COPYRIGHT: (C)1980,JPO&Japio
JP13003978A 1978-10-24 1978-10-24 Treating method of molten iron Granted JPS5558310A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP13003978A JPS5558310A (en) 1978-10-24 1978-10-24 Treating method of molten iron
US06/085,255 US4295882A (en) 1978-10-24 1979-10-16 Steel making process
CA000338106A CA1136421A (en) 1978-10-24 1979-10-22 Steelmaking process
BR7906836A BR7906836A (en) 1978-10-24 1979-10-23 STEEL MANUFACTURING PROCESS
AU52082/79A AU518874B2 (en) 1978-10-24 1979-10-23 Conversion of molten iron to molten steel
DE2942779A DE2942779C2 (en) 1978-10-24 1979-10-23 Process for the production of steel
GB7936945A GB2045281B (en) 1978-10-24 1979-10-24 Multi stage conversion of crude iron to steel with minimised slag production
FR7926431A FR2439821A1 (en) 1978-10-24 1979-10-24 PROCESS FOR THE MANUFACTURE OF STEEL
BE2/58152A BE879594A (en) 1978-10-24 1979-10-24 STEEL MANUFACTURING PROCESS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13003978A JPS5558310A (en) 1978-10-24 1978-10-24 Treating method of molten iron

Publications (2)

Publication Number Publication Date
JPS5558310A true JPS5558310A (en) 1980-05-01
JPS5711368B2 JPS5711368B2 (en) 1982-03-04

Family

ID=15024614

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13003978A Granted JPS5558310A (en) 1978-10-24 1978-10-24 Treating method of molten iron

Country Status (3)

Country Link
JP (1) JPS5558310A (en)
AU (1) AU518874B2 (en)
BE (1) BE879594A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816006A (en) * 1981-06-17 1983-01-29 Kobe Steel Ltd Dephosphorizing method for molten iron

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103556034B (en) * 2013-11-13 2016-01-06 中国石油集团济柴动力总厂成都压缩机厂 The vermicularizing treating process of natural aerodynamic cylinder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816006A (en) * 1981-06-17 1983-01-29 Kobe Steel Ltd Dephosphorizing method for molten iron
JPS6123243B2 (en) * 1981-06-17 1986-06-05 Kobe Steel Ltd

Also Published As

Publication number Publication date
BE879594A (en) 1980-02-15
AU518874B2 (en) 1981-10-22
AU5208279A (en) 1980-05-01
JPS5711368B2 (en) 1982-03-04

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