| 摘要 |
PROBLEM TO BE SOLVED: To provide a waste treating method capable of inexpensively and efficiently separating lead and copper in wastes and capable of reusing the treated wastes as a cement starting material. SOLUTION: In the treating method, the wastes containing metal are subjected to acid leaching, and a solid component in the acid leached slurry is subjected to alkali treatment and used as the cement starting material. On the other hand, zinc, etc., are added to the separated filtrate solution to precipitate the copper component in the liq. and the copper component is recovered by solid-liq. separation. The zinc, etc., are separated and recovered by solvent extraction, or copper is extracted by adding solvent in the filtrate of the acid leached slurry.
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