Abstract
Improving the separation efficiency of eddy current separator is of great significance in solid waste recycling. In this study, a three-dimensional transient simulation model of eddy current separator was established based on the finite element analysis. The effects of material temperature on the separation were investigated by combining simulations and separation experiments. New concepts, such as separation index and direction angle, were proposed to clarify the related mechanism. It was found that reducing the material temperature can increase the Lorentz force on conductive non-ferrous particles, so the residual temperature after cryogenic crushing can be used to improve the separation between conductive non-ferrous and non-conductive materials. Reducing the material temperature will also increase the fluctuation of the Lorentz force, which negatively affects the separation between different non-ferrous metals. The results revealed that different optimization indexes should be set for different mixtures in the design and optimization of the eddy current separator.
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