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US 9,663,838 B2Granted
Metal recovery method
AssigneeNisshin Steel Co., Ltd.
InventorsTakahiro Yoshino, Masayuki Sugiura, Masakazu Mori, Shintarou Tada
Life of this patent
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Abstract
After molten metal has been poured from a ladle 6 into a converter, metal 6b adhering to the ladle 6 is dropped into the ladle 6 on-line, and molten metal is poured from an electric furnace into the ladle 6 into which the metal 6b has been dropped. As a result, the metal 6b is melted and is recovered as a material.
Claims6
A metal recovery method for recovering, as a material, metal that adheres to a ladle, the method comprising:
- performing a series of processes in which molten metal is poured from a melting furnace into the ladle, the molten metal is subjected to stir refining inside the ladle, and the molten metal inside the ladle is poured into a refining furnace, wherein:
- after pouring a first load of molten metal from the ladle into the refining furnace, dropping a remaining metal adhering to the ladle into the ladle on-line, whereby the remaining metal adhering to the ladle becomes dropped metal received in the ladle, and
- pouring a second load of molten metal from the melting furnace into the ladle wherein the second load of molten metal is poured over the dropped metal received in the ladle, thereby melting the dropped metal and recovering the dropped metal as a material.
Dependencies are inferred from the claim text.