METHOD OF RECOVERING METAL FROM WASTE ELECTRONIC SUBSTRATES

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A method for efficiently recovering various metals such as rare metal, noble metal, and other metals from waste electronic substrates is provided. According to the present invention, a method for recovering metal from waste electronic substrates, including the processes of : a melting process to form a glass phase and a metal phase by melting waste electronic substrates and a glass together, the metal phase being derived from metal contained in at least one of the waste electronic substrates and the glass; a metal recovering process to separate and recover the metal phase from the glass phase; and an acid extraction process to allow the glass phase to come in contact with an acid solution; wherein : the glass phase comprises a first phase having silica as the main component and a second phase having higher solubility than the first phase with respect to the acid solution; and the second phase is dissolved in the acid solution together with a residual metal contained in the second phase, and the acid solution having the residual metal dissolved therein is recovered in the acid extraction process, is provided.