Method for producing molten steel

A method for producing a molten steel using a solid-state direct reduced iron as a raw material, the method comprising:

• in a first furnace, melting 40% to 95% by mass of the solid-state direct reduced iron, and separating a molten pig iron having a carbon content of 2.0% to 5.0% by mass and a temperature of 1350 to 1550° C. and a slag having a basicity of 1.0 to 1.4;
• and
• in a second furnace, melting a remainder of the solid-state direct reduced iron together with the molten pig iron separated in the first furnace to form a molten material, and blowing oxygen onto the molten material to decarburize into a molten steel,
• wherein the solid-state direct reduced iron comprises 3.0% by mass or more of SiO2 and Al2O3 in total and 1.0% by mass or more of carbon based on a total mass of the solid-state direct reduced iron, a ratio of a metallic iron to a total iron content contained in the solid-state direct reduced iron is 90% by mass or more, and Cx specified by formula (1) is 0.2% by mass or more,
• Cx=[C]—[FeO]×12÷(55.85+16)÷0.947 (1)
• where Cx is an excess carbon content % by mass, [C] is a carbon content of solid-state direct reduced iron % by mass, and [FeO] is a FeO content of solid-state direct reduced iron % by mass.