Method for producing molten steel
AssigneeJfe Steel Corporation
InventorsKeisuke MIZOBATA, Takeshi MURAI
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Abstract
A molten steel production method is for controlling the Al concentration of molten steel to a target content of 0.01 mass % or more, without significantly increasing processing cost, when deoxidation refining is performed using a vacuum degassing apparatus, and when Al is added to molten steel at least twice in the vacuum degassing apparatus. The method includes: predicting an Al yield from a change in the temperature of a slag before and after the first addition of Al; and using the predicted Al yield to determine an amount of Al to be added in at least one subsequent addition of Al.
Claims11
A method for producing molten steel having an aluminum (Al) concentration of 0.01 mass % or more by adding Al to a molten steel at least twice in a vacuum degassing apparatus, the method comprising:
- predicting an Al yield from a change in a temperature of a slag before and after a first addition of Al;
- and using the predicted Al yield to determine an amount of Al to be added in at least one subsequent addition of Al.
A method for producing molten steel having an aluminum (Al) concentration of 0.01 mass % or more, the method comprising:
- adding Al to the molten steel at least twice in a vacuum degassing apparatus;
- predicting an Al yield from a change in a temperature of a slag before and after a first addition of Al;
- and
- using the predicted Al yield to determine an amount of Al to be added in at least one subsequent addition of Al.
Dependencies are inferred from the claim text.