JPS5760006A - Method for protection of oxygen blowing tuyere into molten iron - Google Patents

Method for protection of oxygen blowing tuyere into molten iron

Info

Publication number
JPS5760006A
JPS5760006A JP55133967A JP13396780A JPS5760006A JP S5760006 A JPS5760006 A JP S5760006A JP 55133967 A JP55133967 A JP 55133967A JP 13396780 A JP13396780 A JP 13396780A JP S5760006 A JPS5760006 A JP S5760006A
Authority
JP
Japan
Prior art keywords
gaseous oxygen
tuyere
powder
fire resistant
molten iron
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
JP55133967A
Other languages
Japanese (ja)
Other versions
JPS6050844B2 (en
Inventor
Yozo Takemura
Isao Kobayashi
Yasuhiro Akita
Iku Kato
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 JP13396780A priority Critical patent/JPS6050844B2/en
Priority to ES505740A priority patent/ES505740A0/en
Priority to US06/305,259 priority patent/US4388113A/en
Priority to AU75681/81A priority patent/AU531023B2/en
Priority to CA000386735A priority patent/CA1170460A/en
Priority to BR8106166A priority patent/BR8106166A/en
Priority to KR1019810003603A priority patent/KR860001523B1/en
Priority to DE8181304470T priority patent/DE3176581D1/en
Priority to AT81304470T priority patent/ATE31551T1/en
Priority to EP81304470A priority patent/EP0049148B1/en
Publication of JPS5760006A publication Critical patent/JPS5760006A/en
Publication of JPS6050844B2 publication Critical patent/JPS6050844B2/en
Expired 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

Abstract

PURPOSE:To prevent the burnout of tuyeres by blowing fire resistant powder together with gaseous oxygen thereby forming by firing a protecting layer in the leading end part of the tuyere in a tuyere immersed in bath for blowing gaseous oxygen into molten iron. CONSTITUTION:If fire resistant powder 6 is blown together with gaseous oxygen for refining into a tuyer 3 constituted of a single pipe, the powder 6 penetrates into oxides such SiO2, MnO2, FeO, formed at the reaction point near the tuyere 3, whereby a protection layer 7 of high heat resistance is formed. CaO, CaCO3, MgO, MgCO3, calcined dolomite, Al2O3, etc. are used as the powder 6. It is equally well to use double-ply pipes for the tuyere 3 and to blow gaseous oxygen through the inside pipe and the fire resistant powder together with gaseous oxygen through the outside pipe.
JP13396780A 1980-09-26 1980-09-26 How to protect tuyeres for blowing oxygen into molten iron Expired JPS6050844B2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
JP13396780A JPS6050844B2 (en) 1980-09-26 1980-09-26 How to protect tuyeres for blowing oxygen into molten iron
ES505740A ES505740A0 (en) 1980-09-26 1981-09-24 A METHOD OF PREVENTING DAMAGE TO A SUBMERGED NOZZLE
US06/305,259 US4388113A (en) 1980-09-26 1981-09-24 Method of preventing damage of an immersed tuyere of a decarburization furnace in steel making
AU75681/81A AU531023B2 (en) 1980-09-26 1981-09-25 Preventing damage of an immersed tuyere
CA000386735A CA1170460A (en) 1980-09-26 1981-09-25 Method of preventing damage of an immersed tuyere of a decarburization furnace in steel making
BR8106166A BR8106166A (en) 1980-09-26 1981-09-25 PROCESS TO PREVENT DAMAGE TO AN IMMERSED VENTANEIRA DE A DECARBURATION OVEN IN STEEL MANUFACTURING AND REDUCE THE SHAKING STRENGTH OF THE CAST METAL BATH
KR1019810003603A KR860001523B1 (en) 1980-09-26 1981-09-26 Method preventon corrosion of tuyere nozzle for decarburizing refining furnace
DE8181304470T DE3176581D1 (en) 1980-09-26 1981-09-28 A method of preventing damage to an immersed tuyere of a decarburization furnace in steel making
AT81304470T ATE31551T1 (en) 1980-09-26 1981-09-28 METHOD OF PREVENTING DAMAGE TO AN IMMERSION NOZZLE OF A STEEL DECARBURIZING FURNACE IN STEELMAKING.
EP81304470A EP0049148B1 (en) 1980-09-26 1981-09-28 A method of preventing damage to an immersed tuyere of a decarburization furnace in steel making

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13396780A JPS6050844B2 (en) 1980-09-26 1980-09-26 How to protect tuyeres for blowing oxygen into molten iron

Publications (2)

Publication Number Publication Date
JPS5760006A true JPS5760006A (en) 1982-04-10
JPS6050844B2 JPS6050844B2 (en) 1985-11-11

Family

ID=15117263

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13396780A Expired JPS6050844B2 (en) 1980-09-26 1980-09-26 How to protect tuyeres for blowing oxygen into molten iron

Country Status (1)

Country Link
JP (1) JPS6050844B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5993815A (en) * 1982-11-17 1984-05-30 Nippon Steel Corp Washing method of bottom blowing nozzle for converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5993815A (en) * 1982-11-17 1984-05-30 Nippon Steel Corp Washing method of bottom blowing nozzle for converter
JPS6232245B2 (en) * 1982-11-17 1987-07-14 Nippon Steel Corp

Also Published As

Publication number Publication date
JPS6050844B2 (en) 1985-11-11

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