| 摘要 |
The present invention relates to a method for collecting a valuable metal by separating the same from a waste Pb-free solder by utilizing iron chloride fluid. The method for collecting a valuable metal by separating the same from a waste Pb-free solder by utilizing iron chloride fluid according to the present invention includes: a leaching step which inputs the waste Pb-free solder including tin, copper, and silver into a solvent with a solubility enhancing agent to improve the solubility of Fe3+ ions, tin, copper, leaches tin, and copper from the waste Pb-free solder and deposits silver; a solid-and-fluid separating step which mutually separates the liquid solvent in which the tin ion and copper ion are dissolved from the solid silver via the separation of solid and fluid after the leaching step; and a sorting-collecting step of separating and collecting the copper and the silver from the solvent. [Reference numerals] (10) Leaching step; (20) Solid-liquid separating step; (30) Copper separation step; (40) Tin collection step; (50) Copper collection step; (AA) Waste Pb-free solder; (BB) Ag precipitation, collection; (CC) Cu collection; (DD) Sn precipitation, collection |
