Study of Recovery of Metals from Discarded Printed Circuit Boards Using Water Medium-Varied Diameter Separation Bed

摘要：

The dissociation degree of metal and nonmetallic in circuit boards depends on the comminuted grain size. With the metals in circuit board basically dissociated, the discarded printed circuit boards are firstly crushed by wet method, then the crushed products, 1 ~ 0.5 mm, 0.5 ~ 0.25 mm, 0.25 ~ 0.125 mm, 0.125 ~ 0.074 mm, were separated by water mediumvaried diameter separation bed. Experimental results showed that, metal content reduced with decrescent grain size of the crushed circuit board, water medium-varied diameter separation bed could efficiently recover the metal from discarded circuit boards, recovery rates of metals and metal concentrate grade were both over 90 ％ after separation, total metals and copper had the same enrichment ratio, and both increased with decrescent grain size of the feeding materials. The enrichment ratios of total metals and copper even reached 6.06 and 6.14, copper and most metal components almost had the same migration character in the separation of discarded circuit boards.

关键词： varied diameter separation bed discarded printed circuit boards (PCBs) metal concentrate recovery

作者: Ke WANG Yuemin ZHAO Man ZHANG Bo ZHANG Xiaodong YU

作者单位: School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Chin School of Environment Science and Spatial Informatics, China University of Mining& Technology, Xuzho

会议类型: 国际会议

会议名称: The Sixth International Conference on Waste Management and Technology(第六届固体废物管理与技术国际会议 ICWMT 6)

会议地点: 苏州

会议语种:英文

页码: 293-296

在线出版日期: 2011-08-30（万方平台首次上网日期，不代表论文的发表时间）