Selective recovery of valuable metals from crushed electronic waste

20th International Scientific and Research Conference "Metallurgy: Technologies, Innovation, Quality. Metallurgy-2017"

Akhmetvaliyeva, Z.M.^1 ; Kulenova, N.A.^1 ; Takasaki, Ya^2 ; Mamyachenkov, S.V.^3 ; Anisimova, O.S.^3 ; Mudashiru, L.K.^4 ; Fokina, E.L.^5 ; Bast, J.^6

East Kazakhstan State Technical University, 19 Serikbayev street, Ust-Kamenogorsk

070010, Kazakhstan^1

Akita University, 1-1 Tegata Gakuen machi, Akita

010-8502, Japan^2

Ural Federal University, 17 Mira street, Ekaterinburg

620002, Russia^3

Durham University, Palatine Centre, 3LE Stockton Road, Durham

DH1, United Kingdom^4

Saint Petersburg State University, 7-9 University embankment, Saint Petersburg

199034, Russia^5

Freiberg University of Mining and Technology, 6 Academy street, Freiberg

09599, Germany^6

关键词: Electronic waste (e waste);    Leaching solution;    Optimal temperature;    Organic phasis;    Selective recovery;    Thermally activated;    Valuable metals;    Waste samples;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/411/1/012011/pdf
DOI  :  10.1088/1757-899X/411/1/012011

来源: IOP

【 摘 要 】

This research was carried out to recover valuable metals from the electronic waste (e-waste). E-waste samples were crushed and thermally activated under 450 °C within 1 hour. The optimal temperature of the thermal treatment, at which all organic phases are removed and metal's forms turned into oxides was determined. Leaching of thermally activated material using EDTA at room temperature, pH 7 for 1 hour resulted in greater than 95 % extraction of lead. Non-ferrous metals were extracted at 85 °C with a leaching solution of 2 M H2SO4 which resulted in recovery of more than 98 % of copper within 3 hours.