JPS5719318A - Method for protecting bottom blowing tuyere - Google Patents

Method for protecting bottom blowing tuyere

Info

Publication number
JPS5719318A
JPS5719318A JP9190380A JP9190380A JPS5719318A JP S5719318 A JPS5719318 A JP S5719318A JP 9190380 A JP9190380 A JP 9190380A JP 9190380 A JP9190380 A JP 9190380A JP S5719318 A JPS5719318 A JP S5719318A
Authority
JP
Japan
Prior art keywords
velocity
molten steel
pipe
gaseous
tuyere
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
JP9190380A
Other languages
Japanese (ja)
Inventor
Kazuo Ogahira
Masazumi Hirai
Arata Tanaka
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 JP9190380A priority Critical patent/JPS5719318A/en
Publication of JPS5719318A publication Critical patent/JPS5719318A/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
    • C21C5/34—Blowing 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 prevent flowing in of molten steel and prevent the erosion of a bottom blowing tuyere by flowing gaseous O2 at above the velocity of sound into the inside pipe of a tuyere of concentrical multipipe construction for oxygen blowing provided to the steel producing furnace body under molten metal surface and gaseous CO2 at above the prescribed velocity of flow below the velocity of sound into the outside pipe, respectively. CONSTITUTION:In a tuyere of concentrical multipipe construction for oxygen blowing provided under the surface of molten steel 5 in the bottom part of a molten steel receiving vessel 1, gaseous O2 is blown from an inside pipe 3 into the molten steel 5 at a velocity of flow above the velocity of sound. Also, along with this blowing of the gaseous O2, gaseous CO2 is blown from an outside pipe 4 into the molten steel 5 at a >=150m/sec velocity of flow and a 60-600Nl/cm.sec flow rates per unit length of the outside circumference of the outside pipe 4. As a result, the closing of the pipe 3 and the pipe 4 owing to backflow of the molten steel 5 into these pipes is prevented. The bottom blowing tuyere is protected by cooling the same uniformly over the entire outside circumference.
JP9190380A 1980-07-05 1980-07-05 Method for protecting bottom blowing tuyere Pending JPS5719318A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9190380A JPS5719318A (en) 1980-07-05 1980-07-05 Method for protecting bottom blowing tuyere

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9190380A JPS5719318A (en) 1980-07-05 1980-07-05 Method for protecting bottom blowing tuyere

Publications (1)

Publication Number Publication Date
JPS5719318A true JPS5719318A (en) 1982-02-01

Family

ID=14039526

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9190380A Pending JPS5719318A (en) 1980-07-05 1980-07-05 Method for protecting bottom blowing tuyere

Country Status (1)

Country Link
JP (1) JPS5719318A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5941696A (en) * 1983-06-10 1984-03-07 Sanyo Electric Co Ltd Blower
EP0644269A1 (en) * 1993-09-21 1995-03-22 The Gas Research Institute Process for controlling the forming of an accretion on an oxy-fuel tuyere

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5460212A (en) * 1977-10-22 1979-05-15 Sumitomo Metal Ind Ltd Steel making by pure oxygen bottom blast converter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5460212A (en) * 1977-10-22 1979-05-15 Sumitomo Metal Ind Ltd Steel making by pure oxygen bottom blast converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5941696A (en) * 1983-06-10 1984-03-07 Sanyo Electric Co Ltd Blower
EP0644269A1 (en) * 1993-09-21 1995-03-22 The Gas Research Institute Process for controlling the forming of an accretion on an oxy-fuel tuyere

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