Method for producing chromium-containing molten steel

A method for producing chromium-containing molten steel comprising, using a steelmaking refining furnace, melting and heating a raw material containing a chromium-containing raw material,

• wherein
• the method includes:
• adjusting slag basicity to be in a range of not less than 1.5 and not more than 3.0,
• then performing rough decarburization by oxygen blowing, wherein after the rough decarburization by oxygen blowing a concentration of chromium oxide in the slag exceeds 50 mass %,
• then, after the rough decarburization by oxygen blowing (i) adjusting the slag basicity to be in a range of not less than 2.0 and not more than 3.5, and (ii) adjusting the concentration of the chromium oxide in the slag to be in a range of not less than 5 mass % and not more than 50 mass % by adding an amount of one or two raw materials that are selected from a Si-containing raw material and an Al-containing raw material, and
• then, after adjusting the concentration of the chromium oxide in the slag, performing tapping while keeping the slag containing chromium oxide generated by the oxygen blowing remaining in the furnace;
• and
• then reducing the remaining slag containing chromium oxide by a carbon source or a metal source newly added into the same furnace to recover chromium into molten steel,
• wherein:
• the slag basicity is determined by dividing a CaO concentration by a SiO2 concentration on a mass basis in the slag.