ES8607408A1 - Process and apparatus for adding calcium to a bath of molten ferrous material. - Google Patents

Process and apparatus for adding calcium to a bath of molten ferrous material.

Info

Publication number
ES8607408A1
ES8607408A1 ES545813A ES545813A ES8607408A1 ES 8607408 A1 ES8607408 A1 ES 8607408A1 ES 545813 A ES545813 A ES 545813A ES 545813 A ES545813 A ES 545813A ES 8607408 A1 ES8607408 A1 ES 8607408A1
Authority
ES
Spain
Prior art keywords
wire
nozzle
molten
molten material
bath
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.)
Expired
Application number
ES545813A
Other languages
Spanish (es)
Other versions
ES545813A0 (en
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.)
Pfizer Inc
Original Assignee
Pfizer Inc
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 US06/522,754 external-priority patent/US4481032A/en
Priority claimed from US06/522,753 external-priority patent/US4512800A/en
Application filed by Pfizer Inc filed Critical Pfizer Inc
Publication of ES545813A0 publication Critical patent/ES545813A0/en
Publication of ES8607408A1 publication Critical patent/ES8607408A1/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
    • C21C7/04—Removing impurities by adding a treating agent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/02—Dephosphorising or desulfurising
    • 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
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/10—Making spheroidal graphite cast-iron
    • 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
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • 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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • 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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/064—Dephosphorising; Desulfurising
    • 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
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising

Landscapes

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

Abstract

A process for adding calcium to a bath (2) of molten ferrous material is disclosed in which a calcium metal-containing wire (1) is fed through a refractory lance (5) into the bath (2). Recirculatory stirring of the molten ferrous material is accomplished with an inert gas flow through the lance (5). The caicium-containing wire (1) is fed at such a rate that it substantially bends towards the horizontal direction after it leaves the lance (5) and melting of the calcium in the wire (1) occurs primarily in or directly below a region of downwelling of the molten ferrous material. Suitable wire feeding rates will depend upon the disposition of the lance (5) in the bath and the composition (e.g. clad or unclad) and cross-sectional dimensions of the calcium metal-containing wire (1). A preferred apparatus for adding processing elements in wire form directly into a molten material comprises a heat resistant nozzle (60) positionable relative to the surface of the molten material such that an inlet is disposed above the surface and an outlet (84) is disposed beneath the surface a mechanism (24) for feeding the wire (20) through the nozzle (60) directly into the molten material and a system (31, 33, 42) for injecting a substantially inert gaseous medium into the molten material together with the wire (20), whereby the inert gas substantially prevents closure of the nozzle (60) by solidified molten material and promotes mixture of the processing elements with the molten material through gas bubble agitation. The apparatus further comprises a substantially gas-tight conduit (44) connected to the nozzle inlet, through which the wire (20) and the inert gaseous medium are delivered to the nozzle (60). A pressure-driven seal (30) prevents atmospheric contamination and prevents loss of inert gas. Passing the wire (20) and gaseous medium through a bore in the nozzle (60) having an elongated, gradually tapered funnel-shaped section (80) adjacent the outlet (84) maximizes the effect of the inert gaseous medium.
ES545813A 1983-08-12 1985-08-01 Process and apparatus for adding calcium to a bath of molten ferrous material. Expired ES8607408A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/522,754 US4481032A (en) 1983-08-12 1983-08-12 Process for adding calcium to a bath of molten ferrous material
US06/522,753 US4512800A (en) 1983-08-12 1983-08-12 Wire injection apparatus

Publications (2)

Publication Number Publication Date
ES545813A0 ES545813A0 (en) 1986-06-16
ES8607408A1 true ES8607408A1 (en) 1986-06-16

Family

ID=27060927

Family Applications (3)

Application Number Title Priority Date Filing Date
ES535098A Expired ES8700330A1 (en) 1983-08-12 1984-08-10 Process and apparatus for adding calcium to a bath of molten ferrous material.
ES545813A Expired ES8607408A1 (en) 1983-08-12 1985-08-01 Process and apparatus for adding calcium to a bath of molten ferrous material.
ES545812A Expired ES8607407A1 (en) 1983-08-12 1985-08-01 Process and apparatus for adding calcium to a bath of molten ferrous material.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
ES535098A Expired ES8700330A1 (en) 1983-08-12 1984-08-10 Process and apparatus for adding calcium to a bath of molten ferrous material.

Family Applications After (1)

Application Number Title Priority Date Filing Date
ES545812A Expired ES8607407A1 (en) 1983-08-12 1985-08-01 Process and apparatus for adding calcium to a bath of molten ferrous material.

Country Status (8)

Country Link
EP (1) EP0137618B1 (en)
JP (1) JPH0347909A (en)
KR (1) KR880000468B1 (en)
AU (1) AU550957B2 (en)
BR (1) BR8404033A (en)
DE (1) DE3472274D1 (en)
DK (1) DK386284A (en)
ES (3) ES8700330A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE456001B (en) * 1983-11-08 1988-08-29 Bind O Matic Ab BLOCK AND WAY TO MAKE THE SAME
WO1986004359A1 (en) * 1985-01-24 1986-07-31 Vallourec Method for treating liquid metals by using a calcium-containing coated wire
US4705261A (en) * 1986-11-28 1987-11-10 Pfizer Inc. Wire injection nozzle
FR2764905B1 (en) * 1997-06-23 1999-07-23 Pechiney Electrometallurgie PROCESS FOR TREATING MOLTEN LEAD WITH CALCIUM AND CALCIUM-BASED WIRE FOR SUCH TREATMENT
RU2152834C1 (en) * 1999-12-06 2000-07-20 Неретин Александр Алексеевич Method for making calcium wire
FR2871477B1 (en) 2004-06-10 2006-09-29 Affival Sa Sa WIRE FOURRE
US8221677B2 (en) * 2007-04-02 2012-07-17 Specialty Minerals (Michigan) Inc. Wire injection lance nozzle insert

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577837A (en) * 1949-10-29 1951-12-11 Lothar R Zifferer Introduction of magnesium into molten iron
FR2008407A1 (en) * 1968-05-13 1970-01-23 Nippon Kokan Kk
US3778250A (en) * 1969-02-26 1973-12-11 Jones & Laughlin Steel Corp Method for treating metallic melts
JPS4936086B1 (en) * 1969-03-07 1974-09-27
BE795333A (en) * 1972-03-01 1973-05-29 Thyssen Niederrhein Ag DESULFURATION PROCESS FOR FUSION STEEL AND POCKET FOR ITS IMPLEMENTATION
DE2607947C2 (en) * 1976-02-27 1985-03-14 Fried. Krupp Gmbh, 4300 Essen Loading device
DE2634282C2 (en) * 1976-07-28 1978-04-13 Mannesmann Ag, 4000 Duesseldorf Process for the continuous introduction of additives into a vessel filled with liquid metal
US4094666A (en) * 1977-05-24 1978-06-13 Metal Research Corporation Method for refining molten iron and steels
JPS5713115A (en) * 1980-06-26 1982-01-23 Komatsu Ltd Production of tough and strong free-cutting ca cast steel

Also Published As

Publication number Publication date
EP0137618B1 (en) 1988-06-22
ES545813A0 (en) 1986-06-16
DK386284D0 (en) 1984-08-10
AU3178384A (en) 1985-02-14
KR850001921A (en) 1985-04-10
ES8607407A1 (en) 1986-06-16
JPH0369966B2 (en) 1991-11-06
ES535098A0 (en) 1986-10-16
DE3472274D1 (en) 1988-07-28
EP0137618A3 (en) 1986-04-02
EP0137618A2 (en) 1985-04-17
JPH0347909A (en) 1991-02-28
KR880000468B1 (en) 1988-04-07
DK386284A (en) 1985-02-13
AU550957B2 (en) 1986-04-10
BR8404033A (en) 1985-07-16
ES8700330A1 (en) 1986-10-16
ES545812A0 (en) 1986-06-16

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20060417