%0 Journal Article
%T Study on Metals Recovery from -0.074 mm Printed Circuit Boards by Enhanced Gravity Separation<br>Study on Metals Recovery from –0.074 mm Printed Circuit Boards by Enhanced Gravity Separation
%A ZHAO Yue-min
%A WEN Xue-feng
%A SHI Hong-xia
%A JIAO Hong-guang
%A TAO You-jun
%A <br>赵跃民
%A 温雪峰
%A 施红霞
%A 焦红光
%A 陶有俊
%J 过程工程学报
%D 2006
%I 
%X Nowadays study on reutilization of discarded printed circuit boards (PCBs) has great significance for achieving secondary resources recycling and preventing environmental pollution. Physical methods show great potential and advantages on discarded PCBs reutilization, compared with chemical and biological methods. However for the particles of -0.074 mm PCBs, little work has been done in the past because of lower separation efficiency and recovery. In this work, the conundrum of-0.074 mm PCBs reutilization was resolved successfully with the help of Falcon concentrator. Separation mechanism for fine particles with different mass densities in a Falcon centrifugal concentrator was analyzed. The main factors such as magnitude of rotation frequency (centrifugal acceleration), anti-charge water pressure and feeding concentration were studied,and interaction of different factors was analyzed using Design-Expert software. The experimental results show that metals grade of-0.074 mm PCBs and integration efficiency were obtained as 76.89% and 80.77% respectively when feeding concentration was 40 g/L with water pressure of 0.01 MPa and rotation frequency of 50 Hz.
%K discarded printed circuit boards
%K enhanced gravity separation
%K metals recovery
%K Falcon concentrator<br>印刷电路板
%K 重力分离
%K 选矿
%K 综合利用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=FFC923ED1815DAD4&yid=37904DC365DD7266&vid=B31275AF3241DB2D&iid=0B39A22176CE99FB&sid=BC084ACE66B62CC8&eid=02DC3A182A5530DF&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=2&reference_num=9