METHOD FOR PRODUCING NODULAR CAST IRON

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A method for producing nodular cast iron by using a nodulizer and a spheroidizing device, the method including spheroidizing, the spheroidizing including the following steps : a) placing an integrated rare earth magnesium ferrosilicon nodulizer coated with a rectangular steel tube at a preset position inside a spheroidizing ladle, disposing a strut head on the spheroidizing ladle, and fixing the strut head; b) inputting a ferrosilicon inoculant into the spheroidizing ladle; c) inputting melted iron into the spheroidizing ladle for spheroidizing; and d) removing the strut head from the spheroidizing ladle after spheroidizing.