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Communication Dans Un Congrès Année : 2023

Electrostatic Separation of Valuable Metals from Finely-Ground WEEE

Résumé

Waste electrical and electronic equipment contains heavy metals (arsenic, mercury, chromium, cadmium, lead, etc.) and halogen materials (bromine, chlorine, etc.), which are toxic for humans and harmful to the environment. Electrostatic separation could be used to distinctly recover the constituents of such granular waste. This technique implies the charging of the finely-ground (mm and sub-mm size) constituents by corona discharge and electrostatic induction, followed by their separation in the electric field created by different electrode configurations. The aim was to find viable technical solutions to the problem of electrostatic separation of mixtures of conductive and insulating materials of submillimeter sizes in the recycling industry. The feasibility tests were carried out on samples of 200 g of finely-ground materials (size less than 5 mm) originating from the processing of waste, using an electrostatic drum-type separator to sort the mixtures and recover the insulating and conductive materials in distinct compartments. The quality of the separation was evaluated by measuring the recovery and the purity of the conductive fraction. The parameters relevant to the efficiency of the separation were the feed rate of the particle separator and the rotation speed of the drum. Mass percentages higher than 90% were obtained in the conductive materials compartment.
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Dates et versions

hal-04435063 , version 1 (02-02-2024)

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Citer

Hakim Moulai, Thami Zeghloul, Imed-Eddine Achouri, Noureddine Menad, Karim Medles, et al.. Electrostatic Separation of Valuable Metals from Finely-Ground WEEE. 2023 IEEE Industry Applications Society Annual Meeting (IAS), Oct 2023, Nashville, France. pp.1-4, ⟨10.1109/IAS54024.2023.10406840⟩. ⟨hal-04435063⟩
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