JPS5544569A - Choke preventing method of gas blowing nozzle - Google Patents

Choke preventing method of gas blowing nozzle

Info

Publication number
JPS5544569A
JPS5544569A JP11823778A JP11823778A JPS5544569A JP S5544569 A JPS5544569 A JP S5544569A JP 11823778 A JP11823778 A JP 11823778A JP 11823778 A JP11823778 A JP 11823778A JP S5544569 A JPS5544569 A JP S5544569A
Authority
JP
Japan
Prior art keywords
inert gas
tuyere
molten metal
converter
gas feed
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
JP11823778A
Other languages
Japanese (ja)
Inventor
Kazuo Ogahira
Hiroaki Kawauchi
Hajime Nakagawa
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 JP11823778A priority Critical patent/JPS5544569A/en
Publication of JPS5544569A publication Critical patent/JPS5544569A/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

Abstract

PURPOSE:To prevent nozzle choke, maintain sufficient rates of flow of blowing gases and achieve the improvement in refining effect by containing the specified density of O2 in the inert gas to be blown under the molten metal surface. CONSTITUTION:The converter is constituted by internally lined refractories 1, converter body shell 2, oxygen blowing lance 3, tuyere 4 for bottom and inert gas feed pipe 5. It is also so constituted that the respective gases from an inert gas feed source 8 such as of Ar, N2, etc. and O2 or O2-containing gas feed source 9 are mixed in a mixer 6 and are then fed 5 into the converter through the tuyere 4. In the above constitution, inert gas (e.g.; Ar gas) of O2 density 0.5-21% is blown under the molten metal surface through the tuyere 5 in the furnace bottom. As a result, the improvement in refining effect owing to holding of the mixing performance of the molten metal in addition to the abovementioned characteristics as well as high effect in terms of maintenance of equipment such as nozzle maintenance, etc. are given.
JP11823778A 1978-09-26 1978-09-26 Choke preventing method of gas blowing nozzle Pending JPS5544569A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11823778A JPS5544569A (en) 1978-09-26 1978-09-26 Choke preventing method of gas blowing nozzle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11823778A JPS5544569A (en) 1978-09-26 1978-09-26 Choke preventing method of gas blowing nozzle

Publications (1)

Publication Number Publication Date
JPS5544569A true JPS5544569A (en) 1980-03-28

Family

ID=14731620

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11823778A Pending JPS5544569A (en) 1978-09-26 1978-09-26 Choke preventing method of gas blowing nozzle

Country Status (1)

Country Link
JP (1) JPS5544569A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5739113A (en) * 1980-08-20 1982-03-04 Nippon Kokan Kk <Nkk> Steel-making process by converter
JPS5789416A (en) * 1980-11-26 1982-06-03 Sumitomo Metal Ind Ltd Composite blowing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5739113A (en) * 1980-08-20 1982-03-04 Nippon Kokan Kk <Nkk> Steel-making process by converter
JPS629161B2 (en) * 1980-08-20 1987-02-26 Nippon Kokan Kk
JPS5789416A (en) * 1980-11-26 1982-06-03 Sumitomo Metal Ind Ltd Composite blowing method

Similar Documents

Publication Publication Date Title
US3672870A (en) Spray refining
JPS5687617A (en) Steel making method using arc furnace
CA1188518A (en) Metal refining processes
US4518422A (en) Process and apparatus for refining steel in a metallurgical vessel
US4308057A (en) Steel making by converter
US3084039A (en) Recovery of combustible gases in ferro-metallurgical processes
JPS57145917A (en) Refining method for high chromium steel
GB1114961A (en) A method and a device for the continuous refining of molten pig iron
JPS5544569A (en) Choke preventing method of gas blowing nozzle
US4565551A (en) Coal gasification apparatus
US3259484A (en) Method and apparatus for producing steel from pig iron
JPS55158211A (en) Refining device of steel having gas circulating system
JPS5713110A (en) Dephosphorization treatment of molten iron
JPS5665906A (en) Method of utilizing converter slag for modification of blast furnace slag
US3224750A (en) Recovery of combustible gases in ferro-metallurgical processes
JPS5798617A (en) Dephosphorizing method for molten pig iron
JPS54151503A (en) Quality reforming converter slag
JPS5757819A (en) Converter steel making method
JPS5565313A (en) Steel manufacture with top blown oxygen
JPS6455315A (en) Method for pretreating molten iron by converter slag
JPS5576013A (en) Al adding method to molten steel
GB685326A (en) Improvements in or relating to process for making steel
JPS648211A (en) Method for pretreating molten iron
JPS5589416A (en) Preparation of nitrogen containing steel
EP0137876A1 (en) Coal gasification method and apparatus therefor