To obtain a melting facility having a preheating chamber coupled directly with a melting chamber in which melting is performed stably at high efficiency by preventing a cold iron source from being suspended below the preheating chamber in the melting chamber.
Using an arc melting facility 1 comprising a melting chamber 2 having arc generating electrodes 6, 7 and a shaft type preheating chamber 3 coupled directly with the melting chamber and being introduced with exhaust gas therefrom, cold iron source 16 in the melting chamber is melted while being fed to the preheating chamber 3 such that a state where the cold iron source is existing continuously from the preheating chamber to the melting chamber is sustained and when at least 1 heat of molten steel 17 is collected in the melting chamber, the molten steel is delivered under a state where the cold iron source is existing continuously from the preheating chamber to the melting chamber. In such a method for melting cold iron source, cold iron source deposited at the lower position of the preheating chamber in the melting chamber is melted while being stuck with a sticking rod or the molten steel in the vicinity of boundary between the cold iron source and molten steel in the melting chamber is melted while blowing oxygen or inert gas from the bottom of the melting chamber.
YAMAGUCHI RYUJI
NAKAYAMA TAKESHI
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