GB1428204A - Methood for adding lead to molten steel in a ladle - Google Patents

Methood for adding lead to molten steel in a ladle

Info

Publication number
GB1428204A
GB1428204A GB2517773A GB2517773A GB1428204A GB 1428204 A GB1428204 A GB 1428204A GB 2517773 A GB2517773 A GB 2517773A GB 2517773 A GB2517773 A GB 2517773A GB 1428204 A GB1428204 A GB 1428204A
Authority
GB
United Kingdom
Prior art keywords
lead
steel
ladle
bath
added
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
GB2517773A
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.)
Echevarria SA
Inland Steel Co
Original Assignee
Echevarria SA
Inland Steel Co
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 Echevarria SA, Inland Steel Co filed Critical Echevarria SA
Publication of GB1428204A publication Critical patent/GB1428204A/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
    • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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
    • C21C7/0006—Adding metallic additives
    • C21C2007/0012—Lead

Abstract

1428204 Adding lead to steel INLAND STEEL CO and ECHEVARRIA SA 25 May 1973 [25 May 1972] 25177/73 Heading C7D Lead is added to steel by forming a bath of molten steel (11) in a ladle (10), closing the top of the ladle to isolate the ladle interior from the atmosphere, adding lead to the molten steel after the top closing step, stirring the bath with an inert gas (26) during at least part of the lead adding step while maintaining a gaseous atmosphere over the bath during the lead adding and stirring steps and removing gases from the ladle while maintaining the gaseous atmosphere. The lead may be added in pellet form to steel (11) at a temperature greater than that suitable for casting (e.g. 3100‹F) and at which the steel can accomodate a lead content from 0.3-0.4% and the steel subsequently cooled either by reladling or by continuous agitation with inert gas (e.g. argon) to a temperature suitable for casting (e.g. 2800‹F). The steel may be deslagged prior to entry into the ladle or alternatively the lead may be added to a slag free region of the bath surface (40). A super-atmospheric pressure of inert gas may be maintained above the bath and a deoxidizer e.g. aluminium may be added to the bath prior to the addition of the lead. The lead may be added to the bath (11) in Fig.2 concomittant with the stream of molten steel (52) from the small ladle (50) atop the main ladle (10). The resultant bath of molten steel containing lead may be poured or teemed into ingot moulds or the tundish of a continuous casting plant.
GB2517773A 1972-05-25 1973-05-25 Methood for adding lead to molten steel in a ladle Expired GB1428204A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25680672A 1972-05-25 1972-05-25

Publications (1)

Publication Number Publication Date
GB1428204A true GB1428204A (en) 1976-03-17

Family

ID=22973653

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2517773A Expired GB1428204A (en) 1972-05-25 1973-05-25 Methood for adding lead to molten steel in a ladle

Country Status (12)

Country Link
JP (1) JPS5133844B2 (en)
AR (1) AR197334A1 (en)
AT (1) AT336061B (en)
BE (1) BE800085A (en)
BR (1) BR7303888D0 (en)
CA (1) CA1000025A (en)
DE (1) DE2323503A1 (en)
ES (1) ES408639A1 (en)
FR (1) FR2185688B1 (en)
GB (1) GB1428204A (en)
IT (1) IT985959B (en)
LU (1) LU67657A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188891A1 (en) * 1984-12-28 1986-07-30 United Engineering Steels Limited Improvements in or relating to the treatment of molten metal

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5499729A (en) * 1978-01-25 1979-08-06 Mitsubishi Heavy Ind Ltd Continuously vacuum treating method for molten steel
JPS6282404U (en) * 1985-11-13 1987-05-26
BR8901760A (en) * 1989-04-13 1990-10-30 Mannesmann Sa PROCESS AND DEVICE FOR LEADING STEELS CONNECTED TO LEAD
CH685943A5 (en) * 1993-12-17 1995-11-15 Moos Stahl Ag Method and apparatus for Add to Cart of at least one alloying ingredient to a stream of molten metal.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188891A1 (en) * 1984-12-28 1986-07-30 United Engineering Steels Limited Improvements in or relating to the treatment of molten metal

Also Published As

Publication number Publication date
CA1000025A (en) 1976-11-23
FR2185688B1 (en) 1977-02-11
FR2185688A1 (en) 1974-01-04
ES408639A1 (en) 1975-10-16
ATA443773A (en) 1976-08-15
IT985959B (en) 1974-12-30
AT336061B (en) 1977-04-12
AR197334A1 (en) 1974-03-29
BR7303888D0 (en) 1974-01-17
JPS4949818A (en) 1974-05-15
BE800085A (en) 1973-11-26
DE2323503A1 (en) 1973-12-06
LU67657A1 (en) 1974-06-21
JPS5133844B2 (en) 1976-09-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee