JPS55158209A - Composite blowing method of steel - Google Patents

Composite blowing method of steel

Info

Publication number
JPS55158209A
JPS55158209A JP6422279A JP6422279A JPS55158209A JP S55158209 A JPS55158209 A JP S55158209A JP 6422279 A JP6422279 A JP 6422279A JP 6422279 A JP6422279 A JP 6422279A JP S55158209 A JPS55158209 A JP S55158209A
Authority
JP
Japan
Prior art keywords
steel
gas
blowing
owing
oxygen
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
JP6422279A
Other languages
Japanese (ja)
Inventor
Masaharu Anezaki
Yujo Marukawa
Isao Yamazaki
Tsutomu Kajimoto
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
Sumitomo Metal Industries 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP6422279A priority Critical patent/JPS55158209A/en
Priority to US06/148,530 priority patent/US4280838A/en
Priority to AU58590/80A priority patent/AU525023B2/en
Priority to AU2829080A priority patent/AU2829080A/en
Priority to CA000352347A priority patent/CA1153560A/en
Priority to GB8016879A priority patent/GB2054655B/en
Priority to LU82481A priority patent/LU82481A1/en
Priority to FR8011588A priority patent/FR2457325A1/en
Priority to AT0277580A priority patent/AT377007B/en
Priority to NLAANVRAGE8003012,A priority patent/NL183413C/en
Priority to ES491828A priority patent/ES491828A0/en
Priority to IT67813/80A priority patent/IT1130459B/en
Priority to DE3019899A priority patent/DE3019899C2/en
Priority to BR8003268A priority patent/BR8003268A/en
Publication of JPS55158209A publication Critical patent/JPS55158209A/en
Priority to ES498585A priority patent/ES8203423A1/en
Pending 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)

Abstract

PURPOSE:To accelerate the dephosphorization reaction of molten metal owing to molten slag and reduce the loss owing to the oxidation of Fe and Mn by blowing gas from the nozzles under the molten metal surface and evenly mix the molten steel for the specified time at the time of refining the steel in an oxygen top blowing converter. CONSTITUTION:The bottom of an oxygen top blowing converter 1 is disposed with 2-10 pieces of double pipe nozzles 2 in two rows and oxygen top blowing is done by an oxygen lance, and after the blowing, the combined gases of oxidative gas such as CO2, neutral gas such as N, CO, inert gas such as Ar, Kr, Xe are blown through the nozzles 2. Here, this is so done that the even mixing time of the steel bath owing to the gas blowing becomes 20-70 seconds to accelerate the dephosphorization reaction of the steel bath owing to molten slag, as well as to prevent the Fe and Mn in the steel bath from being oxidized by oxygen and becoming loss and escaping into the molten slag and prevent the decrease in the yield of the steel.
JP6422279A 1979-05-24 1979-05-24 Composite blowing method of steel Pending JPS55158209A (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
JP6422279A JPS55158209A (en) 1979-05-24 1979-05-24 Composite blowing method of steel
US06/148,530 US4280838A (en) 1979-05-24 1980-05-09 Production of carbon steel and low-alloy steel with bottom blowing basic oxygen furnace
AU58590/80A AU525023B2 (en) 1979-05-24 1980-05-20 Carbon steel and low alloy steel with bottom blowing b.o.f.
AU2829080A AU2829080A (en) 1979-05-24 1980-05-20 Carbon steel and low alloy steel with bottom blowing b.o.f.
CA000352347A CA1153560A (en) 1979-05-24 1980-05-21 Production of carbon steel and low-alloy steel with bottom blowing basic oxygen furnace
GB8016879A GB2054655B (en) 1979-05-24 1980-05-22 Simultaneous top and bottom-blowing in oxygen steelmaking
FR8011588A FR2457325A1 (en) 1979-05-24 1980-05-23 METHOD AND APPARATUS FOR THE PRODUCTION OF CARBON STEEL AND LOW ALLOY STEEL IN AN OXYGEN BLOWN FURNACE WITH BOTTOM BLOWING
LU82481A LU82481A1 (en) 1979-05-24 1980-05-23 PROCESS AND APPARATUS FOR MANUFACTURING CARBON STEEL AND LOW ALLOY STEEL USING A BASIC OXYGEN OVEN WITH BOTTOM BLOWING
AT0277580A AT377007B (en) 1979-05-24 1980-05-23 METHOD FOR PRODUCING CARBON STEEL AND LOW-ALLOY STEEL IN A BASIC OXYGEN CONVERTER, AND STEEL GENERATING DEVICE FOR CARRYING OUT THE METHOD
NLAANVRAGE8003012,A NL183413C (en) 1979-05-24 1980-05-23 METHOD FOR PREPARING CARBON STEEL OR LOW ALLOY STEEL.
ES491828A ES491828A0 (en) 1979-05-24 1980-05-23 METHOD FOR PRODUCING CARBON STEEL AND LOW-ALEA-CION STEEL IN A BASIC OVEN WITH OXYGEN BLOWING.
IT67813/80A IT1130459B (en) 1979-05-24 1980-05-23 PROCEDURE FOR THE PRODUCTION OF CARBON STEEL AND LE GATO STEEL WITH A BASIC OXYGEN OVEN AND INSUFLATION FROM THE BOTTOM
DE3019899A DE3019899C2 (en) 1979-05-24 1980-05-23 Process for the production of carbon steel and low-alloy steel in a basic oxygen furnace and apparatus for carrying out the process
BR8003268A BR8003268A (en) 1979-05-24 1980-05-26 PROCESS FOR THE PRODUCTION OF CARBON STEEL AND LOW ALLOY STEEL IN A BASIC OXYGEN OVEN, AND APPLIANCE FOR THE SAME
ES498585A ES8203423A1 (en) 1979-05-24 1981-01-16 Steel manufacturing apparatus (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6422279A JPS55158209A (en) 1979-05-24 1979-05-24 Composite blowing method of steel

Publications (1)

Publication Number Publication Date
JPS55158209A true JPS55158209A (en) 1980-12-09

Family

ID=13251853

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6422279A Pending JPS55158209A (en) 1979-05-24 1979-05-24 Composite blowing method of steel

Country Status (1)

Country Link
JP (1) JPS55158209A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57177912A (en) * 1981-04-28 1982-11-01 Nippon Steel Corp Preventing method for slopping of pure oxygen top blown converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57177912A (en) * 1981-04-28 1982-11-01 Nippon Steel Corp Preventing method for slopping of pure oxygen top blown converter

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