GB762009A - Improvements in or relating to the denitridisation of steel - Google Patents

Improvements in or relating to the denitridisation of steel

Info

Publication number
GB762009A
GB762009A GB3090/54A GB309054A GB762009A GB 762009 A GB762009 A GB 762009A GB 3090/54 A GB3090/54 A GB 3090/54A GB 309054 A GB309054 A GB 309054A GB 762009 A GB762009 A GB 762009A
Authority
GB
United Kingdom
Prior art keywords
mixture
steel
blown
boron
sodium carbonate
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
GB3090/54A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB762009A publication Critical patent/GB762009A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C7/00—Alloys based on mercury
    • 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
    • C21C7/0087—Treatment of slags covering the steel bath, e.g. for separating slag from the molten metal

Abstract

Steel is denitridized by the addition of a mixture of hydrated sodium carbonate and boron or lithium. The boron may be in the form of ferro-boron and anhydrous sodium carbonate may be included in the mixture, the proportions of the mixture in this case being: Na2CO3.10H2O-12 parts by weight; Na2CO3-12 parts by weight; ferroboron-1 part by weight. When treating steel made by the basic Bessemer process, the steel is blown in the usual way and, after deslagging, the mixture is thrown into the converter. The steel is then blown for a short time to submerge the reagents, the converter lowered, the slag run off and the steel deoxidized with ferromanganese. With the acid Bessemer process, the steel is blown and deoxidized in the normal way and the mixture is added to the ladle before tapping. The mixture may also be added in the open-hearth furnace or in the stream of metal. The hydrated sodium carbonate component of the mixture causes some dephosphorization as described in Specification 761,969.
GB3090/54A 1952-02-14 1952-04-07 Improvements in or relating to the denitridisation of steel Expired GB762009A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU762009X 1952-02-14

Publications (1)

Publication Number Publication Date
GB762009A true GB762009A (en) 1956-11-21

Family

ID=19733412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3090/54A Expired GB762009A (en) 1952-02-14 1952-04-07 Improvements in or relating to the denitridisation of steel

Country Status (1)

Country Link
GB (1) GB762009A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4078915A (en) * 1972-10-27 1978-03-14 Suddeutsche Kalkstickstoff-Werke Aktiengesellschaft Method and composition for the desulfurization of molten metals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4078915A (en) * 1972-10-27 1978-03-14 Suddeutsche Kalkstickstoff-Werke Aktiengesellschaft Method and composition for the desulfurization of molten metals

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