Study on Metals Recovery from Discarded Printed Circuit Boards Using a Pulsing Liquid-Solid Fluidized Bed
According to the density difference of metals and nonmetals, a pulsing liquid-solid fluidized bed was used to recover metals from printed circuitboard (PCB), which was milled and separated into four size fractions: 1-0.5, 0.5-0.25, 0.25-0.125, 0.125-0.074 mm. The results indicated that metal recovery decreased as the operation velocity increased. The separation tests of 1-0.074 mm electronic waste in pulsing waterflow classifier were conducted, adopting Design-Expert 7.1 software to do the orthogonal experiments and analyzing the results. A Quadratic model between separation efficiency and different operation variable was obtained, which showed that the interaction of waterflow velocity and pulsing frequency on separation efficiency was significant. The separation efficiency could achieve 91.41％ after optimizing the operating condition.
pulsing liquid-solid fluidized bed pulsing waterflow separation quadratic model discarded PCB
Bo ZHANG Yuemin ZHAO Yangui WANG Bo LV Ke WANG Xia CHEN
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Ch School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing) ,
国际会议
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)
苏州
英文
297-301
2011-08-30（万方平台首次上网日期，不代表论文的发表时间）