Method for refining a molten steel in vacuum
AssigneeNippon Steel Corporation
InventorsSatomi Yamamoto, Masataka Yoshii
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Abstract
A method for refining a molten steel in vacuum, which comprises blowing a non-oxidizing gas or a non-oxidizing gas together with an oxidizing gas into a bath of the molten steel in a refining vessel of a R-H vacuum degassing apparatus at a position between the bath surface and a bath depth of 50 cm (inclusive) from the bath surface in an almost horizontal direction.
Claims9
In a method for refining molten steel in a vacuum using a R-H vacuum degassing apparatus by blowing a gas through a tuyere into the molten steel bath, the improvement which comprises blowing the gas into the bath at a position between the bath surface and a depth of 50 cm from the bath surface in a substantially horizontal direction.
Dependencies are inferred from the claim text.