Process for refining molten pig iron and steel
AssigneeNippon Steel Corporation
InventorsMasataka Yoshii, Mitsugu Anabuki, Tatsuro Kuwabara, Yasuo Obana, Takuo Kono
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Abstract
Refining of molten pig iron and steel in a converter by oxygen blowing continuously at least four charges in a converter to a carbon content in a range from 0.09 to 0.15% and further subjecting the molten steel to a secondary refining by addition or removal of carbon.
Claims8
A process for refining molten pig iron and steel, which comprises successively treating each of at least four charges with oxygen-blowing in a converter and stopping the oxygen-blowing at a blown-off carbon [C] content ranging from 0.09 to 0.15%, tapping the resultant molten steel from the converter, and subjecting the molten steel tapped from the converter to a secondary refinement to obtain a desired carbon content.
Dependencies are inferred from the claim text.