JPS56142811A - Protecting method for tuyere of bottom-blown refining furnace - Google Patents

Protecting method for tuyere of bottom-blown refining furnace

Info

Publication number
JPS56142811A
JPS56142811A JP4518680A JP4518680A JPS56142811A JP S56142811 A JPS56142811 A JP S56142811A JP 4518680 A JP4518680 A JP 4518680A JP 4518680 A JP4518680 A JP 4518680A JP S56142811 A JPS56142811 A JP S56142811A
Authority
JP
Japan
Prior art keywords
tuyere
blown
refining furnace
pipe
protecting
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
JP4518680A
Other languages
Japanese (ja)
Inventor
Isao Kobayashi
Yasuhiro Akita
Masayuki Kudo
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 JP4518680A priority Critical patent/JPS56142811A/en
Publication of JPS56142811A publication Critical patent/JPS56142811A/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 protect the tuyere securely and enhance the durability of the tuyere by a method wherein a protecting material is blown in together with a carrier gas and is coagulated at the periphery of the tuyere, in the bottom-blown refining furnace. CONSTITUTION:The tuyere 13 of double-pipe structure consisting of an outer pipe 11 and an inner pipe 12 is provided at the bottom part of a vessel of the bottom- blown refining furnace. Oxygen gas for refining is blown in through the inner pipe 12, while the particulate protecting material 14 is blown in through the outer pipe 11 by using the carrier gas and is coagulated to form a protecting member 14' at the periphery of the tuyere. Alternatively, the tuyere is comprised of a single pipe and the protecting material is injected into the flow of oxygen gas. The protecting member 14' formed by said method is rigid and protects the tuyere securely. Incidentally, since the protecting member 14' is not formed on the inner side of the tuyere, the effective inside diameter of the tuyere is prevented from being changed. Accordingly, a reduction in the activity rate of the refining furnace due to replacement of the tuyere is avoided and the productivity is enhanced.
JP4518680A 1980-04-08 1980-04-08 Protecting method for tuyere of bottom-blown refining furnace Pending JPS56142811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4518680A JPS56142811A (en) 1980-04-08 1980-04-08 Protecting method for tuyere of bottom-blown refining furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4518680A JPS56142811A (en) 1980-04-08 1980-04-08 Protecting method for tuyere of bottom-blown refining furnace

Publications (1)

Publication Number Publication Date
JPS56142811A true JPS56142811A (en) 1981-11-07

Family

ID=12712234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4518680A Pending JPS56142811A (en) 1980-04-08 1980-04-08 Protecting method for tuyere of bottom-blown refining furnace

Country Status (1)

Country Link
JP (1) JPS56142811A (en)

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