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US 4,389,249 AGranted
Method for adding ingredient to steel as shot
AssigneeInland Steel Company
InventorsMichael O. Holowaty, Ian F. Hughes, John Lude
Life of this patent
Estimating the term…
Abstract
Alloying ingredients are added as shot to a pouring stream of molten steel flowing from a ladle to a casting mold. The size of the shot is controlled to enhance the recovery and uniformity of distribution in the steel of the alloying ingredients.
Claims11
In a process wherein alloying ingredients are added as shot to molten steel which is flowed from a ladle to a casting mold, a method for enhancing the recovery and uniformity of distribution in said steel of said alloying ingredients, said method comprising:
- employing a shot size within the range 0.5-2.0 mm, (0.019-0.078 in.) with no more than about 1 wt.% outside said size range;
- and feeding said shot into said molten steel without mechanical hurling.
Dependencies are inferred from the claim text.