A novel process for recovering valuable metals from waste nickel-cadmium batteries

Environmental Science & Technology
Kui HuangZhenming Xu

Abstract

The environment is seriously polluted due to improper and inefficient recycling of waste nickel-cadmium (Ni-Cd) batteries in China. The aim of this work is aimed to seek an environmentally friendly recycling process for resolving the negative impacts on environmental and human health resulting from waste Ni-Cd batteries. This work investigates the fundamentals of waste Ni-Cd batteries recycling through vacuum metallurgy separation (VMS) and magnetic separation (MS). The results obtained demonstrate that the optimal temperature, the addition of carbon powder, and heating time in VMS are 1023 K, 1 wt %, 1.5 h, respectively. More than 99.2 wt % Cd is recovered under the optimal experimental condition, and the Cd purity is 99.98%. Around 98.0 wt % ferromagnetic materials are recovered through MS under 60 rpm rotational speed and the recovery ratios of Fe, Ni and Co are 99.2 wt %, 96.1 wt %, and 86.4 wt %, respectively. The composition of ferromagnetic fractions in the residue after VMS increases from 82.3 to 99.6%. Based on these results, a process (including dismantling and crushing, VMS and MS) for recycling of waste Ni-Cd batteries is proposed. This novel process provides a possibility for recycling waste Ni-Cd batteries in a la...Continue Reading

Citations

Jun 15, 2010·Waste Management·Kui HuangZhenming Xu
Apr 8, 2014·Environmental Technology·Umesh U Jadhav, Hong Hocheng
Mar 19, 2014·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Yunxia He, Zhenming Xu
Aug 21, 2018·Chemical Society Reviews·Xiaoxiao ZhangRenjie Chen
Mar 9, 2018·Journal of Environmental Management·Yafei ShenMindong Chen
Jun 25, 2015·Environmental Science & Technology·Daejin KimRamesh R Bhave
Nov 20, 2014·Environmental Science & Technology·Lu Zhan, Zhenming Xu

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