EXTRACTION METHOD OF INDIUM SPONGE, COPPER SPONGE, TIN SPONGE AND ZINC OXIDE FROM MIXED METAL SPONGE

摘要

PURPOSE: A method for recovering In, Cu, and Sn sponges and Zn oxide from mixed metal sponges is provided to recover Zn oxide from Zn-based waste acid additionally produced in a recovery process of each sponge. CONSTITUTION: A method for recovering In, Cu, and Sn sponges and Zn oxide from mixed metal sponges comprises the steps of: separating CuS cake, SnS cake, and Zn-based acidic waste water from the mixed metal sponges and recovering In sponge(P100), separating Sn oxide slurry and the Zn-based acidic waste water from the CuS cake and the SnS cake and recovering Cu sponge(P200), separating the Zn-based acidic waste water from the Sn oxide slurry and recovering Sn sponge(P300), and recovering Zn oxide powder from the Zn-based acidic waste water(P400). [Reference numerals] (P100) Step of recovering In sponge; (P200) Step of recovering Cu sponge; (P300) Step of recovering Sn sponge; (P400) Step of recovering Zn oxide powder