JPS556476A - Atmosphere shielding method in ladle refining - Google Patents

Atmosphere shielding method in ladle refining

Info

Publication number
JPS556476A
JPS556476A JP7911978A JP7911978A JPS556476A JP S556476 A JPS556476 A JP S556476A JP 7911978 A JP7911978 A JP 7911978A JP 7911978 A JP7911978 A JP 7911978A JP S556476 A JPS556476 A JP S556476A
Authority
JP
Japan
Prior art keywords
lance
molten steel
oxidative gas
gas
atmosphere
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
JP7911978A
Other languages
Japanese (ja)
Other versions
JPS5643373B2 (en
Inventor
Minoru Kitamura
Shozo Kawasaki
Junkichi Kobayashi
Kenji Kawai
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP7911978A priority Critical patent/JPS556476A/en
Publication of JPS556476A publication Critical patent/JPS556476A/en
Publication of JPS5643373B2 publication Critical patent/JPS5643373B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Treatment Of Steel In Its Molten State (AREA)

Abstract

PURPOSE: To prevent the surface of molten metal from contacting the atmosphere by spouting non-oxidative gas to the surface of the molten steel from the circumference of the non-immersion part of the lance at the time of blowing the non-oxidative gas with the immersion lance into the molten metal in ladle.
CONSTITUTION: The lance 1 covered with refractories is immersed through the opening part 71 of the cover 7 of the ladle 4 containing molten steel 5. Non-oxdative gas is blown through the upper inlet hole 2 of the lance 1 to stirr the molten steel 5. Or refining agents such as deoxidizer, desulphrizer, etc. are blown together with the non-oxidative gas. At this time, the non-oxidative gas is simultaneously introduced through the inlet hole 32 of the lance 1 and is spouted onto the molten steel surface from the hood 34 provided around the lance 1. The exposed surface 51 of the molten steel is covered with the non-oxidative gas by the bubbles 8 of the non-oxidative gas. In this way, the molten steel 5 is cut off from contacting with the atmosphere, and the degradation of its quality by absorbing oxygen, nitrogen and hydrogen from the inside of air is obviated.
COPYRIGHT: (C)1980,JPO&Japio
JP7911978A 1978-06-28 1978-06-28 Atmosphere shielding method in ladle refining Granted JPS556476A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7911978A JPS556476A (en) 1978-06-28 1978-06-28 Atmosphere shielding method in ladle refining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7911978A JPS556476A (en) 1978-06-28 1978-06-28 Atmosphere shielding method in ladle refining

Publications (2)

Publication Number Publication Date
JPS556476A true JPS556476A (en) 1980-01-17
JPS5643373B2 JPS5643373B2 (en) 1981-10-12

Family

ID=13681028

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7911978A Granted JPS556476A (en) 1978-06-28 1978-06-28 Atmosphere shielding method in ladle refining

Country Status (1)

Country Link
JP (1) JPS556476A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56126087A (en) * 1980-03-11 1981-10-02 Mitsubishi Heavy Ind Ltd Titanium alloy sheet metal parts
JPS6130289A (en) * 1984-07-20 1986-02-12 Tokuriki Honten Co Ltd Production of composite material
JPH02282492A (en) * 1989-04-21 1990-11-20 Eagle Ind Co Ltd Production of bonded body of electrocast part and metallic part
US9267425B2 (en) 2011-02-28 2016-02-23 Mitsubishi Heavy Industries, Ltd. Air supply device of gas engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56126087A (en) * 1980-03-11 1981-10-02 Mitsubishi Heavy Ind Ltd Titanium alloy sheet metal parts
JPS6130289A (en) * 1984-07-20 1986-02-12 Tokuriki Honten Co Ltd Production of composite material
JPH0368796B2 (en) * 1984-07-20 1991-10-29 Tokuriki Honten Kk
JPH02282492A (en) * 1989-04-21 1990-11-20 Eagle Ind Co Ltd Production of bonded body of electrocast part and metallic part
US9267425B2 (en) 2011-02-28 2016-02-23 Mitsubishi Heavy Industries, Ltd. Air supply device of gas engine

Also Published As

Publication number Publication date
JPS5643373B2 (en) 1981-10-12

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