Manufacture of steel

Details Manufacture of steel Manufacture of steel

C - Chemistry, Metallurgy

21

C

53/105, 53/99

C21C 7/04 (2006.01) C21C 7/064 (2006.01)

Patent

CA 1044898

A B S T R A C T The invention is concerned with the desulphurising 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 desulphurise 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. - 1 -

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