[Study on recovery of copper from waste printed wiring boards by electrostatic separation].
Recovery of Cu from waste printed wiring boards (PWBs) was studied by crushers and electrostatic separator. The results of pulverizing experiment show that liberation degree of metal is higher in grain size -0.9 + 0.074 mm, the product of this grain size can be used as raw material in electrostatic separation. The main factors that influence electrostatic separation are found by dynamic analysis of particles in course of electrostatic separation, it conclude electrode voltage, roller rotate speed, electric coronary polar distance and granularity of particles. The -0.9 + 0.074 mm pulverizing product is separated through single stage electrostatic separation after optimizing influence factors. Result shows that the enrichment condition of Cu in fine material is good, Cu could be concentrated from 32.0% to 63.6%, and recovery ratio is 78.7%.
Ma
Jun-wei
JW
School of Environment, Beijing Normal University, Beijing 100875, China. jwma@bnu.edu.cn
Wang
Zhen-zhen
ZZ
Li
Jin-hui
JH
D003300:Copper / Q000737:chemistry* / Q000302:isolation & purification; D004581:Electronics; D008962:Models, Theoretical; D011327:Printing; D055672:Static Electricity; D018505:Waste Management / Q000379:methods*; D014866:Waste Products
D014866:Waste Products; D003300:Copper