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KR900006541A - Method for selecting molten metal - Google Patents

Method for selecting molten metal Download PDF

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Publication number
KR900006541A
KR900006541A KR1019890014420A KR890014420A KR900006541A KR 900006541 A KR900006541 A KR 900006541A KR 1019890014420 A KR1019890014420 A KR 1019890014420A KR 890014420 A KR890014420 A KR 890014420A KR 900006541 A KR900006541 A KR 900006541A
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KR
South Korea
Prior art keywords
molten metal
pressure
gas
toor
vessel
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KR1019890014420A
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Korean (ko)
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KR920006578B1 (en
Inventor
도시오 이시이
슈니찌 스기야마
요시데루 기구찌
히데도시 마쯔노
Original Assignee
사이또 히로시
엔 케이 케이 코퍼레이션
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Priority claimed from JP25080688A external-priority patent/JP2718096B2/en
Priority claimed from JP63250807A external-priority patent/JPH0742524B2/en
Priority claimed from JP1031105A external-priority patent/JPH02211974A/en
Application filed by 사이또 히로시, 엔 케이 케이 코퍼레이션 filed Critical 사이또 히로시
Publication of KR900006541A publication Critical patent/KR900006541A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • C22B1/04—Blast roasting
    • 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
    • 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
    • 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
    • C21C7/0081—Treating and handling under pressure
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

내용 없음No content

Description

용융금속을 정선하기 위한 방법Method for selecting molten metal

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따라 용융금속으로서 질소가스의 송풍에 의해 용융금속이 기포를 발생시킬 때의 용기내부의 압력과 용융금속이 탈가스시의 용기 내부의 압력 사이의 관계를 도시하는 그래프도.1 is a graph showing the relationship between the pressure inside the container when the molten metal generates bubbles by blowing nitrogen gas as the molten metal and the pressure inside the container when the molten metal is degassed.

제2도는 본 발명에 따라 VOD 공정을 수행하는 레이들에 관한 정련장치를 예시하는 수직단면도.2 is a vertical sectional view illustrating a refining apparatus for a ladle for performing a VOD process according to the present invention.

제3도는 본 발명에 따라 VAD 공정을 수행하는 레이들에 관한 정련장치를 예시하는 수직 단면도.3 is a vertical sectional view illustrating a refining apparatus for a ladle for performing a VAD process according to the present invention.

Claims (10)

용융금속을 포함하고 있는 용기 내부의 압력을 대기압 이하로 된 PS압력으로 유지시키는 단계 : 용기 내의 용융금속을 용융금속내에 용해하는 가스에 의해 기포를 발생시키게 하며, 상기 일부가스는 용융금속에 용해되어 있고, 상기 가스의 나머지 부분은 가스 기포로 전환하는 단계 : 및 용기내의 압력을 PE압력 로 신속하게 감소시키며, 미세 가스기포는 용기내의 용융금속에서 생성되며, 비금속 함유물은 기포 발생에 의해 생성된 상기 미세 가스기포 및 가스기포에 의해 트랩되어 용융금속의 표면으로 상승하며, 용융금속에 용해되어 있는 가스를 제거시키는 단계를 포함하는 것을 특징으로 하는 용융금속을 정선하기 위한 방법.Maintaining the pressure inside the vessel containing the molten metal at a P S pressure below atmospheric pressure: causing bubbles to be generated by a gas dissolving the molten metal in the molten metal in the molten metal, wherein the partial gas is dissolved in the molten metal; Converting the remaining portion of the gas into a gas bubble: and rapidly reducing the pressure in the vessel to P E pressure, wherein fine gas bubbles are produced from the molten metal in the vessel, and the non-metallic inclusions are generated by bubble generation. And trapping by the generated fine gas bubbles and gas bubbles to rise to the surface of the molten metal, and removing the gas dissolved in the molten metal. 제1항에 있어서, 압력을 유지시키는 단계의 압력(PS)및 압력을 감소시키는 단계의 압력(PE)는 세로 좌표가 PSToor이고 가로 좌표가 PEToor인 이차원 직각 좌표에 있어서 PS=760, PE=40 및 (PS)1'*-(PE)1°*=3,06으로 둘러싸인 존에서 용기 내부의 대기에 대한 압력(PS,PE)인 것을 특징으로 하는 용융금속을 정선하기 위한 방법.The method of claim 1, wherein the pressure P S of maintaining the pressure and the pressure P E of decreasing the pressure are P in two-dimensional rectangular coordinates in which the ordinate is P S Toor and the abscissa is P E Toor. S = 760, P E = 40 and (P S ) 1 '* -(P E ) is the pressure (P S , P E ) to the atmosphere inside the vessel in the zone surrounded by 1 ° * = 3,06 Method for selecting molten metal to be. 제2항에 있어서, 상기 압력 (PS,PE)은 세로 좌표 PSToor이고 가로 좌표가 PEToor인 이차원 직각 좌표에 있어서, PS=760, PE=40, PS=400 및 (PS)1'2-(PE)1'2=3,06으로 둘러싸인 존에서 용기내부의 대기에 대한 압력(PS,PE)인 것을 특징으로 하는 용융금속을 정선하기 위한 방법.The two-dimensional rectangular coordinate of claim 2, wherein the pressure P S , P E is a vertical coordinate P S Toor and the horizontal coordinate is P E Toor, wherein P S = 760, P E = 40, P S = 400 and (P S) 1'2 - a method for the choice of molten metal, characterized in that (P E) 1'2 = the pressure of the atmosphere in the vessel in a zone enclosed by 3,06 (P S, P E) . 제3항에 있어서, 상기 압력 (PS,PE)은 세로 좌표 PSToor이고 가로 좌표가 PEToor인 이차원 직각 좌표에 있어서, PS=760, PE=40, PS=200 및 (PS)1'2-(PE)1'2=3,06으로 둘러싸인 존에서 용기내부의 대기에 대한 압력(PS,PE)인 것을 특징으로 하는 용융금속을 정선하기 위한 방법.4. The two-dimensional rectangular coordinate of claim 3, wherein the pressures P S , P E are ordinate P S Toor and the abscissa is P E Toor, wherein P S = 760, P E = 40, P S = 200 and (P S) 1'2 - a method for the choice of molten metal, characterized in that (P E) 1'2 = the pressure of the atmosphere in the vessel in a zone enclosed by 3,06 (P S, P E) . 제1항에 있어서, 압력을 유지시키는 단계의 압력(PS) 및 압력을 감소시키는 단계의 압력(PE)은 세로 좌표 PSToor이고 가로 좌표가 PEToor인 이차원 직각 좌표에 있어서 (PS,PE)좌표를 나타내는 점(40,88) 및 (0.75)을 연걸시키는 선, PS=760, PE=40, PS=400 및 P=0으로 둘러싸인 존에서 용기 내부의 대기에 대한 압력(PS,PE)인 것을 특징으로 하는 용융금속을 정선하기 위한 방법.2. The two-dimensional rectangular coordinate of claim 1, wherein the pressure P S of maintaining the pressure and the pressure P E of decreasing the pressure are in the two-dimensional rectangular coordinates of which the ordinate is P S Toor and the abscissa is P E Toor. S , P E ) to the atmosphere inside the vessel in a zone enclosed by points (40,88) and (0.75) representing the coordinates, P S = 760, P E = 40, P S = 400 and P = 0 Method for selecting a molten metal, characterized in that the pressure (P S , P E ). 제1항에 있어서, 기포 발생 단계에서 용융금속에 용해하는 상기 가스는 N2임을 특징으로 하는 용융금속을 정선하기 방법.The method of claim 1, wherein the gas dissolved in the molten metal in the bubble generation step is N 2 . 제1항에 있어서, 압력을 감소시키는 상기 단계는 불활성 가스를 용융금속으로 송풍하여 상기 용융금속을 교반 시키는 것을 특징으로 하는 용융금속을 정선하기 위한 방법.The method of claim 1, wherein the step of reducing pressure comprises blowing an inert gas into the molten metal to stir the molten metal. 제1항에 있어서, 압력을 감소시키는 상기 단계는 용융금속이 용융금속에 용해하는 가스의 송풍에 의해 기포를 발생시키는 것을 특징으로 하는 용융금속을 정선하기 위한 방법.The method for selecting molten metal according to claim 1, wherein the step of reducing the pressure generates bubbles by blowing a gas in which the molten metal dissolves in the molten metal. 제1항에 있어서, 압력을 감소시키는 상기 단계는 용융금속이 용융금속을 포함하는 기밀용기를 회전시키며, 용융금속 배드의 심부에 있는 용융금속이 용융금속 배드의 표면의 측부로 이동하는 것을 특징으로 하는 용융금속을 정선하기 위한 방법.2. The method of claim 1, wherein said step of reducing pressure rotates an airtight vessel wherein the molten metal comprises molten metal and wherein the molten metal at the core of the molten metal bed moves to the side of the surface of the molten metal bed. Method for selecting molten metal to be. 제1항에 있어서, 압력을 감소시키는 상기 단계는 기밀 용기에 유지되는 용융금속 배드의 깊이를 감소시키는 것을 특징으로 하는 용융금속을 정선하기 위한 방법.The method of claim 1, wherein said step of reducing pressure reduces the depth of molten metal bad retained in said hermetic container. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019890014420A 1988-10-06 1989-10-06 Method for selecting molten metal Expired KR920006578B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP88-250807 1988-10-06
JP25080688A JP2718096B2 (en) 1988-10-06 1988-10-06 Vacuum cleaning method for molten metal
JP63250807A JPH0742524B2 (en) 1988-10-06 1988-10-06 Method for cleaning molten metal
JP88-250806 1988-10-06
JP89-031105 1989-02-13
JP1031105A JPH02211974A (en) 1988-01-21 1989-02-13 Vacuum cleaning method for molten metal

Publications (2)

Publication Number Publication Date
KR900006541A true KR900006541A (en) 1990-05-08
KR920006578B1 KR920006578B1 (en) 1992-08-10

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KR1019890014420A Expired KR920006578B1 (en) 1988-10-06 1989-10-06 Method for selecting molten metal

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EP (1) EP0362851B1 (en)
KR (1) KR920006578B1 (en)
AU (2) AU4245789A (en)
BR (1) BR8905068A (en)
CA (1) CA1339703C (en)
DE (1) DE68905741T2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5004495A (en) * 1990-02-05 1991-04-02 Labate M D Method for producing ultra clean steel

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1582780A (en) * 1968-01-10 1969-10-10
US3635696A (en) * 1968-05-21 1972-01-18 Finkl & Sons Co Treatment of molten metal using arc heat and vacuum
DE2710577A1 (en) * 1977-03-11 1978-09-14 Thyssen Edelstahlwerke Ag METHOD OF REFRESHING STEEL
DE3426736A1 (en) * 1984-07-20 1986-01-30 Klöckner CRA Technologie GmbH, 4100 Duisburg METHOD FOR THE PURGE GAS TREATMENT OF METAL MELT
GB2162604B (en) * 1984-07-30 1988-05-25 Teves Gmbh Alfred Braking pressure generator for a hydraulic brake system
US4780134A (en) * 1986-09-23 1988-10-25 A. Finkl & Sons Co. Simplified method and apparatus for treating molten steel

Also Published As

Publication number Publication date
CA1339703C (en) 1998-03-10
EP0362851A3 (en) 1990-06-20
EP0362851B1 (en) 1993-03-31
AU655245B2 (en) 1994-12-08
AU1397692A (en) 1992-05-28
EP0362851A2 (en) 1990-04-11
DE68905741D1 (en) 1993-05-06
AU4245789A (en) 1990-08-16
KR920006578B1 (en) 1992-08-10
DE68905741T2 (en) 1993-09-23
BR8905068A (en) 1990-05-08

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