Manufacture of steel

Details Manufacture of steel Manufacture of steel

1974-11-14

1977-03-29

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 53, 75 57, 75 58, 75 94, C21C 702, C22B 910

Patent

active

040146855

ABSTRACT:
The invention is concerned with the desulphurizing of molten steel by the use of a lime-based flux. In addition to lime the flux includes sodium carbonate, an alkali metal or alkaline earth metal fluoride, typically fluorspar, alumina and a metallic reducing agent. In particular, the reducing agent is aluminium or an alloy thereof and is present in an amount of 2 to 15% by weight. To desulphurize molten metal the flux is added to the molten metal in a vessel, typically by injecting the flux in particulate form into the molten metal.

REFERENCES:
patent: 3410681 (1968-11-01), Orban
patent: 3467167 (1969-09-01), Mahin
patent: 3537842 (1970-11-01), Holland
patent: 3567432 (1971-03-01), Wardell
patent: 3575695 (1971-04-01), Miyashita
patent: 3681050 (1972-08-01), Ueki
patent: 3695946 (1972-10-01), Demeaux
patent: 3748121 (1973-07-01), Atterbury
patent: 3799762 (1974-03-01), Cass
patent: 3802865 (1974-04-01), Ohkubo
Latimer & Hildebrand, "Reference Book of Inorganic Chemistry", 3rd Ed., 1951, p. 327.

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