Method for producing valuable metal

A method of producing a valuable metal from a raw material comprising the valuable metal,

• the method comprising:
• a preparation step of preparing a raw material comprising at least lithium (Li), aluminum (Al), and the valuable metal;
• a reductive melting step of subjecting the raw material to a reductive melting treatment to obtain a reduced product comprising a slag and an alloy comprising the valuable metal;
• and
• a slag separation step of separating the slag from the reduced product to recover the alloy,
• wherein in one or both of the preparation step and the reductive melting step, a flux comprising calcium (Ca) is added to the raw material and
• in the reductive melting step,
• a melting furnace provided with a means to cool a furnace wall from outside is used, and while cooling the furnace wall with the means,
• the reductive melting treatment is performed so that a mass ratio of aluminum oxide/(aluminum oxide+calcium oxide+lithium oxide) in the slag to be generated is 0.5 or more and 0.65 or less, and a slag heating temperature is set to 1,500° ° C. or higher and 1,600° C. or lower.