METHOD FOR REFINING MOLTEN IRON

The present invention proposes a molten iron refining method that prevents a cold iron source from remaining unmelted even under the condition of a high ratio of the cold iron source. In this method, an auxiliary material is added, and an oxidizing gas is supplied, to a cold iron source and molten pig iron that are contained or fed in a converter-type vessel, and molten iron is subjected to a refining process. Prior to the refining process, a pre-charged cold iron source that is charged all at once into the converter-type vessel before the molten pig iron is charged into the converter-type vessel is charged in an amount not larger than 0.15 times the sum of an amount of the pre-charged cold iron source and a charge amount of the molten pig iron, or is not charged. A furnace-top-added cold iron source that is added from a furnace top of the converter-type vessel is fed into the converter-type vessel during the refining process.