Next Article in Journal
Microscopic Analysis and Electrochemical Behavior of Fe-Based Coating Produced by Laser Cladding
Next Article in Special Issue
Application of Co and Mn for a Co-Mn-Br or Co-Mn-C2H3O2 Petroleum Liquid Catalyst from the Cathode Material of Spent Lithium Ion Batteries by a Hydrometallurgical Route
Previous Article in Journal
Amplitude Dependent Internal Friction in a Mg-Al-Zn Alloy Studied after Thermal and Mechanical Treatment
Previous Article in Special Issue
Novel Recycling Method for Boron Removal from Silicon by Thermal Plasma Treatment Coupled with Steam and Hydrogen Gases
Open AccessArticle

Trajectory Analysis of Copper and Glass Particles in Electrostatic Separation for the Recycling of ASR

1
Department of Energy & Resources Engineering, Chosun University, Gwangju 61452, Korea
2
Korea Institute of Geoscience and Mineral Resources, Daejeon 34132, Korea
3
University of Science and Technology, Daejeon 34113, Korea
*
Author to whom correspondence should be addressed.
Metals 2017, 7(10), 434; https://doi.org/10.3390/met7100434
Received: 6 September 2017 / Revised: 7 October 2017 / Accepted: 13 October 2017 / Published: 17 October 2017
(This article belongs to the Special Issue Valuable Metal Recycling)
Automobile-shredder-residue (ASR) recycling techniques have been widely applied for improving the total recycling rate of end-of-life vehicles. In this study, to obtain useful information for predicting or improving ASR-separation efficiency, trajectory analyses of conductors (copper) and non-conductors (glass) were performed using a lab-scale induction electrostatic separator. The copper-wire trajectories obtained showed a good agreement depending significantly on the electric field strength and particle size. The observed copper-wire trajectories showed consistent congruity with the coarse-particles simulation (0.5 and 0.25 mm). The observed fine-particles (0.06 mm) trajectory was deflected toward the (−) attractive electrode, owing to the charge density effects due to the particle characteristics and relative humidity. This results in superior separation performance because more copper enters the conductor products bin. The actual dielectric-glass trajectory was deflected toward the (−) attractive electrode, thus showing characteristics similar to conductive-particle characteristics. Through analyses conducted using a stereoscopic microscope, scanning electron microscope, and energy dispersive spectroscope, we found heterogeneous materials (fine ferrous particles and conductive organics) on the glass surface. This demonstrates the separation-efficiency decrease for non-ferrous metals during electrostatic separation in the recycling of ASR. Future work should include a pretreatment process for eliminating impurities from the glass and advanced trajectory-simulation processes. View Full-Text
Keywords: ASR; particle trajectory; conductor; electrostatic separation ASR; particle trajectory; conductor; electrostatic separation
Show Figures

Figure 1

MDPI and ACS Style

Kim, B.-U.; Han, O.-H.; Jeon, H.-S.; Baek, S.-H.; Park, C.-H. Trajectory Analysis of Copper and Glass Particles in Electrostatic Separation for the Recycling of ASR. Metals 2017, 7, 434.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop