Metal recovery method
After molten metal has been poured from a ladle 6 into a converter, metal 6 b 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 6 b has been dropped. As a result, the metal 6 b is melted and is recovered as a material.
1. 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.
2. The metal recovery method according to claim 1 , wherein the stir refining is mechanical stir refining in which agitation is performed by an impeller that is immersed in the molten metal, or injection stir refining in which a gas is blown into the molten metal.
3. The metal recovery method according to claim 1 , wherein the molten metal that is poured from the melting furnace into the ladle is stainless-steel molten metal.
4. The metal recovery method according to claim 2 , wherein the molten metal that is poured from the melting furnace into the ladle is stainless-steel molten metal.
5. The metal recovery method of claim 1 , wherein the step of dropping comprises hitting the remaining metal adhering to the ladle with a bit.
6. The metal recovery method of claim 1 , wherein on-line includes a metal fall area which is provided on a route where the ladle is transported from the refining furnace to the melting furnace, wherein the ladle is continuously used without being in a stand by state.