EP0362851A3 - Method for cleaning molten metal - Google Patents

Method for cleaning molten metal Download PDF

Info

Publication number
EP0362851A3
EP0362851A3 EP89118517A EP89118517A EP0362851A3 EP 0362851 A3 EP0362851 A3 EP 0362851A3 EP 89118517 A EP89118517 A EP 89118517A EP 89118517 A EP89118517 A EP 89118517A EP 0362851 A3 EP0362851 A3 EP 0362851A3
Authority
EP
European Patent Office
Prior art keywords
molten metal
cleaning molten
cleaning
metal
molten
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
EP89118517A
Other versions
EP0362851A2 (en
EP0362851B1 (en
Inventor
Toshio C/O Patent & License Department Ishii
Shunichi C/O Patent & License Department Sugiyama
Yoshiteru C/O Patent & License Department Kikuchi
Hidetoshi C/O Patent & License Department Matsuno
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 Engineering Corp
Original Assignee
NKK 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
Priority claimed from JP63250807A external-priority patent/JPH0742524B2/en
Priority claimed from JP25080688A external-priority patent/JP2718096B2/en
Priority claimed from JP1031105A external-priority patent/JPH02211974A/en
Application filed by NKK Corp filed Critical NKK Corp
Publication of EP0362851A2 publication Critical patent/EP0362851A2/en
Publication of EP0362851A3 publication Critical patent/EP0362851A3/en
Application granted granted Critical
Publication of EP0362851B1 publication Critical patent/EP0362851B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (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)
EP89118517A 1988-10-06 1989-10-05 Method for cleaning molten metal Expired - Lifetime EP0362851B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP250806/88 1988-10-06
JP250807/88 1988-10-06
JP63250807A JPH0742524B2 (en) 1988-10-06 1988-10-06 Method for cleaning molten metal
JP25080688A JP2718096B2 (en) 1988-10-06 1988-10-06 Vacuum cleaning method for molten metal
JP31105/89 1989-02-13
JP1031105A JPH02211974A (en) 1988-01-21 1989-02-13 Method for purifying molten metal by reduction of pressure

Publications (3)

Publication Number Publication Date
EP0362851A2 EP0362851A2 (en) 1990-04-11
EP0362851A3 true EP0362851A3 (en) 1990-06-20
EP0362851B1 EP0362851B1 (en) 1993-03-31

Family

ID=27287204

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118517A Expired - Lifetime EP0362851B1 (en) 1988-10-06 1989-10-05 Method for cleaning molten metal

Country Status (6)

Country Link
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1458935B (en) * Standard-Messo Duisburg, Gesellschaft für Chemietechnik mbH & Co, 4100 Duisburg Method and device for degassing molten metal
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
GB2162604A (en) * 1984-07-30 1986-02-05 Teves Gmbh Alfred Braking pressure generator for a hydraulic brake system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1582780A (en) * 1968-01-10 1969-10-10
DE3426736A1 (en) * 1984-07-20 1986-01-30 Klöckner CRA Technologie GmbH, 4100 Duisburg METHOD FOR THE PURGE GAS TREATMENT OF METAL MELT
US4780134A (en) * 1986-09-23 1988-10-25 A. Finkl & Sons Co. Simplified method and apparatus for treating molten steel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1458935B (en) * Standard-Messo Duisburg, Gesellschaft für Chemietechnik mbH & Co, 4100 Duisburg Method and device for degassing molten metal
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
GB2162604A (en) * 1984-07-30 1986-02-05 Teves Gmbh Alfred Braking pressure generator for a hydraulic brake system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IRON & STEEL INTERNATIONAL, vol. 57, no. 5, October 1984, pages 156-157: "Pulsating for reduced costs" *

Also Published As

Publication number Publication date
EP0362851A2 (en) 1990-04-11
KR920006578B1 (en) 1992-08-10
EP0362851B1 (en) 1993-03-31
DE68905741D1 (en) 1993-05-06
KR900006541A (en) 1990-05-08
DE68905741T2 (en) 1993-09-23
CA1339703C (en) 1998-03-10
BR8905068A (en) 1990-05-08
AU1397692A (en) 1992-05-28
AU655245B2 (en) 1994-12-08
AU4245789A (en) 1990-08-16

Similar Documents

Publication Publication Date Title
EP0522844A3 (en) Method for granulating molten metal
GB2178351B (en) Continuous metal casting method
ZA894622B (en) Immersion nozzles for metal melts
HU904246D0 (en) Method for purification
GB2206678B (en) Method for refining molten metal
EP0296562A3 (en) Molten metal heating method
GB8816004D0 (en) Degassing & cleaning system for molten metals
EP0362851A3 (en) Method for cleaning molten metal
EP0322763A3 (en) Method for cleaning molten metal and apparatus therefor
GB2219232B (en) Molten metal pouring apparatus
GB8808029D0 (en) Molten metal cleansing apparatus
GB8808657D0 (en) Molten metal cleansing apparatus
GB8708559D0 (en) Molten metal cleansing apparatus
GB8709227D0 (en) Molten metal cleansing apparatus
GB8907864D0 (en) Molten metal cleansing apparatus
GB8908334D0 (en) Molten metal cleansing apparatus
ZA908081B (en) Method for the recovering of metal values
BG39057A1 (en) Method for cleaning metal surfaces
GB8730020D0 (en) Metal casting method & apparatus
GB8730021D0 (en) Metal casting method & apparatus
BG47078A1 (en) Method for spraying of metal melt
ZA885906B (en) Metal cleaning apparatus
GB8923312D0 (en) Purifying molten metal
GB8317176D0 (en) Treatment agents for molten metal
ZA899516B (en) Purifying molten metal

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19891005

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19920619

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 68905741

Country of ref document: DE

Date of ref document: 19930506

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20031001

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20031003

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20031016

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041005

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050503

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20041005

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051005