| 摘要 |
PROBLEM TO BE SOLVED: To recover the constituent matters of a waste refrigerator by resources, especially to recover a polyurethane without mixing metals or the like. SOLUTION: The waste refrigerator is crushed by crushing treatment using a primary crusher and a stirring crushing grinder and the polyurethane bonded to the iron plate regions or the like of the refrigerator is peeled to be ground into a powder form. The crushed matter containg the polyurethane powder of the refrigerator is sieved to be separated into large diameter matter 8 and small diameter matter 5 containing the polyrethane powder. The minus sieve small diameter matter 5 is supplied to a wind force sorter (1) and the polyurethane powder 6 is sorted by wind force. Irons are sorted from the large diameter matter 8 by magnetic sorting and plastics are subsequently sorted by a pneumatic sorter (2) and, next, copper and aluminum are sorted by a specific gravity difference sorter. |
