JPS57140811A - Protection method for double pipe tuyere for bottom blowing of oxygen - Google Patents

Protection method for double pipe tuyere for bottom blowing of oxygen

Info

Publication number
JPS57140811A
JPS57140811A JP2552881A JP2552881A JPS57140811A JP S57140811 A JPS57140811 A JP S57140811A JP 2552881 A JP2552881 A JP 2552881A JP 2552881 A JP2552881 A JP 2552881A JP S57140811 A JPS57140811 A JP S57140811A
Authority
JP
Japan
Prior art keywords
oxygen
tuyere
pipe
blowing
bottom blowing
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
JP2552881A
Other languages
Japanese (ja)
Other versions
JPS6235447B2 (en
Inventor
Shozo Murakami
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 JP2552881A priority Critical patent/JPS57140811A/en
Publication of JPS57140811A publication Critical patent/JPS57140811A/en
Publication of JPS6235447B2 publication Critical patent/JPS6235447B2/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
    • 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 improve the stability and life of a double-ply pipe tuyere for bottom blowing of oxygen by mixing a very small amt. of an inert gas or gaseous CO2 with pure oxygen to be blown through the inside pipe of said tuyere. CONSTITUTION:Industrial pure oxygen mixed with a very small amt. of a diluting gas which is an inert gas such as Ar of N2 or gaseous CO2 is blown through the inside pipe consisting in general of stainless steel of the above-mentioned double-ply pipe tuyere for blowing a cooling medium through the outside pipe, whereby pig iron is refined. The rate of mixing the diluting gas with the oxygen is <=10% volume ratio. By the inclusion of the diluting gas, the ignition and combustion of the stainless steel forming the inside pipe by the blowing of pure oxygen in the presence of iron are prevented or suppressed, and the stable operation and refining effect are achieved.
JP2552881A 1981-02-25 1981-02-25 Protection method for double pipe tuyere for bottom blowing of oxygen Granted JPS57140811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2552881A JPS57140811A (en) 1981-02-25 1981-02-25 Protection method for double pipe tuyere for bottom blowing of oxygen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2552881A JPS57140811A (en) 1981-02-25 1981-02-25 Protection method for double pipe tuyere for bottom blowing of oxygen

Publications (2)

Publication Number Publication Date
JPS57140811A true JPS57140811A (en) 1982-08-31
JPS6235447B2 JPS6235447B2 (en) 1987-08-01

Family

ID=12168535

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2552881A Granted JPS57140811A (en) 1981-02-25 1981-02-25 Protection method for double pipe tuyere for bottom blowing of oxygen

Country Status (1)

Country Link
JP (1) JPS57140811A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009250A1 (en) * 1993-09-30 1995-04-06 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process to convert non-ferrous metal such as copper or nickel by oxygen enrichment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50128612A (en) * 1974-03-28 1975-10-09
JPS5613423A (en) * 1979-07-06 1981-02-09 Sumitomo Metal Ind Ltd Refining method for steel
JPS5776117A (en) * 1980-10-29 1982-05-13 Kawasaki Steel Corp Control of bottom blow gas at converter having bottom blowing function

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50128612A (en) * 1974-03-28 1975-10-09
JPS5613423A (en) * 1979-07-06 1981-02-09 Sumitomo Metal Ind Ltd Refining method for steel
JPS5776117A (en) * 1980-10-29 1982-05-13 Kawasaki Steel Corp Control of bottom blow gas at converter having bottom blowing function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009250A1 (en) * 1993-09-30 1995-04-06 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process to convert non-ferrous metal such as copper or nickel by oxygen enrichment

Also Published As

Publication number Publication date
JPS6235447B2 (en) 1987-08-01

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