STABLE STOP OPERATION IN METHOD FOR MANUFACTURING MOLTEN METAL

摘要

PROBLEM TO BE SOLVED: To provide a direct smelting method for manufacturing molten metal from a supply material containing metal in a vessel for housing and containing the molten metal having a slag layer. SOLUTION: The interruption operation when there is a need for interrupting metal manufacture and the continuous supply of oxygen-containing gas and carbon-containing solid material is possible include a step of generating heat in a vessel by continuously pouring the oxygen-containing gas and carbon- containing solid material into the vessel and maintaining a molten metal temperature higher than a molten metal solidifying temperature. When there is a need for interrupting the metal manufacture and there is no carbon-containing solid material while there is the continuous supply of the oxygen-containing gas, the interruption operation includes a step of stopping the supply of the metal- containing supply material, pouring the oxygen-containing gas and gas or liquid combustible material into the vessel to generate the heat in the vessel and maintaining the molten metal temperature.