JPS5623218A - Secondary refining method of molten steel - Google Patents

Secondary refining method of molten steel

Info

Publication number
JPS5623218A
JPS5623218A JP9805679A JP9805679A JPS5623218A JP S5623218 A JPS5623218 A JP S5623218A JP 9805679 A JP9805679 A JP 9805679A JP 9805679 A JP9805679 A JP 9805679A JP S5623218 A JPS5623218 A JP S5623218A
Authority
JP
Japan
Prior art keywords
cylinder
molten steel
pressure
pipings
secondary refining
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
JP9805679A
Other languages
Japanese (ja)
Other versions
JPS5952684B2 (en
Inventor
Tetsuya Fujii
Masao Oguchi
Norio Sumita
Isamu Goto
Koji Sanhongi
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.)
JFE Steel Corp
Original Assignee
Kawasaki 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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP9805679A priority Critical patent/JPS5952684B2/en
Publication of JPS5623218A publication Critical patent/JPS5623218A/en
Publication of JPS5952684B2 publication Critical patent/JPS5952684B2/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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE:To agitate molten metal and effectively perform out-of-furnace secondary refining by dipping a cylinder having an open end into molten steel at the specific depth, flowing molten steel in the cylinder into the cylinder under periodically varying pressures in the cylinder and flowing the same out from the cylinder. CONSTITUTION:A cylinder 6 made of refractory material is immersed in the molten steel 5 in a ladle 1 in such a manner that its bottom end positions below >=100mm. from the surface of the molten steel. Two systems of pipings 11, 12 are connected to the top end of the cylinder 6. The piping 11 is connected to a high pressure N2 gas pipe of 10kg/mm.<2> in main pressure as a high pressure source and the piping 12 is connected to a steam ejector of 100 Torr degree of evacuation as a pressure reducing source. The solenoid valves 16, 17 in both pipings 11, 12 are opened and closed by the timers in a controller 18 to control the frequencies of the pressure fluctuations in the cylinder. In addition, the amplitudes of the pressure fluctuations in the cylinder are detected by a pressure detector 19 and the openings of the flow control valves 14, 15 in both pipings 11, 12 are controlled by the controller 18, whereby the amplitudes of the pressure fluctuations are controlled. Agitating of the molten steel 5 is rationally accomplished and secondary refining such as deoxidizing or component controlling is effectively accomplished.
JP9805679A 1979-08-02 1979-08-02 Secondary refining method of molten steel Expired JPS5952684B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9805679A JPS5952684B2 (en) 1979-08-02 1979-08-02 Secondary refining method of molten steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9805679A JPS5952684B2 (en) 1979-08-02 1979-08-02 Secondary refining method of molten steel

Publications (2)

Publication Number Publication Date
JPS5623218A true JPS5623218A (en) 1981-03-05
JPS5952684B2 JPS5952684B2 (en) 1984-12-21

Family

ID=14209617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9805679A Expired JPS5952684B2 (en) 1979-08-02 1979-08-02 Secondary refining method of molten steel

Country Status (1)

Country Link
JP (1) JPS5952684B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913015A (en) * 1982-07-14 1984-01-23 Shinmei Eng Kk Stirrer for molten metal
JPS59232210A (en) * 1983-06-13 1984-12-27 Ishikawajima Harima Heavy Ind Co Ltd Method and device for refining molten steel
JP2004315893A (en) * 2003-04-16 2004-11-11 Sumitomo Metal Ind Ltd Method for refining molten metal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5913015A (en) * 1982-07-14 1984-01-23 Shinmei Eng Kk Stirrer for molten metal
JPS6359074B2 (en) * 1982-07-14 1988-11-17
JPS59232210A (en) * 1983-06-13 1984-12-27 Ishikawajima Harima Heavy Ind Co Ltd Method and device for refining molten steel
JP2004315893A (en) * 2003-04-16 2004-11-11 Sumitomo Metal Ind Ltd Method for refining molten metal

Also Published As

Publication number Publication date
JPS5952684B2 (en) 1984-12-21

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