Quadratic nonlinear models for optimizing electrostatic separation of crushed waste printed circuit boards using response surface methodology.
The electrostatic separation has proved to be an effective and environment-friendly treatment for the recovery of crushed waste printed circuit boards (PCBs). In this paper a more sophisticated response surface methodology was applied to build quadratic models and optimize the three main factors on a roll-type electrostatic separator. The sample of granular mixture got from crushed PCB wastes (size 0.3-0.45 mm, containing 25% metal and 75% nonmetal). According to the analysis of the experiment data, some quadratic effects were found, and two quadratic models for conductor production (C) and middling production (M) were established. The results indicated that the high voltage level and roll speed are the most important factors for the process. Because of the existence of the quadratic effect, the highest efficiency can also be achieved at a lower voltage level (27-29 kV) compared with a maximum voltage level.
Qin
Yufei
Y
School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Minhang District, Shanghai, People's Republic of China.
Wu
Jiang
J
Zhou
Quan
Q
Xu
Zhenming
Z
D055664:Electrochemical Techniques / Q000379:methods; D004581:Electronics; D007220:Industrial Waste / Q000517:prevention & control*; D008722:Methods; D012037:Refuse Disposal / Q000379:methods*; D055672:Static Electricity
D007220:Industrial Waste