title: Key factors of eddy current separation for recovering aluminum from crushed e-waste.
abstract: Recovery of e-waste in China had caused serious pollutions. Eddy current separation is an environment-friendly technology of separating nonferrous metallic particles from crushed e-waste. However, due to complex particle characters, separation efficiency of traditional eddy current separator was low. In production, controllable operation factors of eddy current separation are feeding speed, (ωR-v), and Sp. There is little special information about influencing mechanism and critical parameters of these factors in eddy current separation. This paper provided the special information of these key factors in eddy current separation of recovering aluminum particles from crushed waste refrigerator cabinets. Detachment angles increased as the increase of (ωR-v). Separation efficiency increased with the growing of detachment angles. Aluminum particles were completely separated from plastic particles in critical parameters of feeding speed 0.5m/s and detachment angles greater than 6.61deg. Sp/Smof aluminum particles in crushed waste refrigerators ranged from 0.08 to 0.51. Separation efficiency increased as the increase of Sp/Sm. This enlightened us to develop new separator to separate smaller nonferrous metallic particles in e-waste recovery. High feeding speed destroyed separation efficiency. However, greater Spof aluminum particles brought positive impact on separation efficiency. Greater Spcould increase critical feeding speed to offer greater throughput of eddy current separation. This paper will guide eddy current separation in production of recovering nonferrous metals from crushed e-waste.
authors.affiliation: School of Environmental Science and Engineering, Sun Yat-Sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China. Electronic address: ruanjujun@mail.sysu.edu.cn.
authors.forename: Jujun
authors.initials: J
authors.lastname: Ruan
authors.affiliation: School of Environmental Science and Engineering, Sun Yat-Sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China.
authors.forename: Lipeng
authors.initials: L
authors.lastname: Dong
authors.affiliation: School of Environmental Science and Engineering, Sun Yat-Sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Zheng
authors.affiliation: School of Environmental Science and Engineering, Sun Yat-Sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China.
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
authors.affiliation: School of Geography and Planning, Sun Yat-Sen University, 135 Xingang Xi Road, Guangzhou 510275, People's Republic of China.
authors.forename: Mingzhi
authors.initials: M
authors.lastname: Huang
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China.
authors.forename: Zhenming
authors.initials: Z
authors.lastname: Xu
mesh_terms: D000535:Aluminum / Q000032:analysis*; D002681:China; D059029:Electronic Waste / Q000032:analysis*; D059027:Recycling / Q000379:methods*; D018505:Waste Management / Q000379:methods*
chemical_list: D000535:Aluminum
keywords: Critical parameters; E-waste; Eddy current separation; New separator