PROBLEM TO BE SOLVED: To efficiently separate and recover various metals in under scraps. SOLUTION: Under scraps are previously treated by a wet classification feeder 2 to remove soil and plastics, the remaining glass and metals are treated in a roller mill 11 to mill the glass, the metals are beaten out flatly, and the oxidized part and coating are milled and released. Subsequently, the glass, heavy metals, various light metals are separated by sizes and recovered by the classifying mechanisms such as a magnetic separator 14, a size classifier 16, dry gravity classifiers 20 and 21, an eddy-current classifier 25 and an electrostatic separator 33.
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