Enrichment of the metallic components from waste printed circuit boards by a mechanical separation process using a stamp mill.

摘要: Abstract Printed circuit boards incorporated in most electrical and electronic equipment contain valuable metals such as Cu, Ni, Au, Ag, Pd, Fe, Sn, Pb. In order to employ a hydrometallurgical route for the recycling of from printed boards, mechanical pre-treatment step is needed. this study, metallic components waste have been enriched using separation process. Waste shredded 5.0 mm. The fractions milled size 5.0 mm fraction heavy were subjected two-step magnetic separation. Through first at 700 Gauss, 83% nickel iron, based on whole was recovered fraction, 92% copper non-magnetic fraction. cumulative recovery nickel–iron concentrate increased by second 3000 Gauss, but grade decreased remarkably 76% 56%. decreased, slightly 71.6% 75.4%. This study has demonstrated feasibility process consisting milling/size classification/gravity separation/two-step enriching Al, Fe boards.