Method for refining hot metal in converter

A method for refining hot metal in a converter using a top-blowing lance having a refining powder supply channel, a combustion oxidizing gas supply channel, and a refining oxidizing gas supply channel that are separate from each other, the method comprising:

• supplying a refining powder from the refining powder supply channel to a surface of the hot metal in the converter using a carrier gas,
• the refining powder including at least one of a lime-based flux, iron oxide, and a combustible material, and
• the carrier gas including a fuel gas or a mixture of the fuel gas and an inert gas, and the volume fraction of the fuel gas in the carrier gas is 30% or more and 80% or less,
• while supplying the refining powder, supplying a combustion oxidizing gas from the combustion oxidizing gas supply channel to form a flame with the combustion oxidizing gas and the fuel gas below a leading end of the top-blowing lance, and
• supplying a refining oxidizing gas from the refining oxidizing gas supply channel to the surface of the hot metal in the converter.