| 摘要 |
<p>PURPOSE:To recover a metal such as copper or the like by grinding a printed circuit board by a grinder having impact force and shearing force to form particles with a particle size of 0.5-5mm and classifying said particles at a classifyng point of 40-300mum to separate a metal such as copper or the like from a glass fiber or a resin. CONSTITUTION:A printed circuit board is ground by a hammer mill or a rotary cutter mill having impact force and shearing force so as to obtain a particle size of 0.5-5mm. By this method, the matter having fragile properties such as an epoxy resin or a glass fiber used in the board is finely ground and a metal such as copper having ductility is roughly ground. By classifying this ground matter at a classifying point of 45-300mum, matter having ductility such as roughly ground copper is classified from the finely ground resin or glass fiber to be efficiently separated. Therefore, valuables such as copper or the like can be efficiently recovered.</p> |
