Abstract
Si, Al, Cu, and Ag particles’ mixture which mainly composes pulverized silicon-based waste solar cells were individually separated by the batch flotation experiments with high recovery and content, and then a general flow chart of the sequential flotation procedure of n-component was postulated including 2-, 3-, and 4-components. The n-component mixture was separated to 1: n-1 or i: j (i + j = n) by a flotation procedure and n-1 times operation was necessary to divide into the individual component. The first flotation process to separate Al into the froth layer was carried out with a collector of SDS solution after dipping Si, Al, Cu, and Ag mixture into the SDS solution. Si was separated in the froth by the second flotation with a collector of a commercial neutral detergent after Al etching by HCl, and Si, Cu and Ag mixture dipped in the detergent. The Cu and Ag mixture was calcinated at 673 or 773 K and dipped into the detergent, and the third flotation with the collector of the detergent led to Cu in the froth and Ag in the sediment. The 4-component mixture was successfully separated into each component by the 3-consecutive flotation processes.
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We wish to express our appreciation for the opportunity to discuss experimental results with Prof. N. Fukuda, Okayama University.
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Mizukawa, M., Nishimura, N., Uddin, M.A. et al. Sequential flotation of 4 components in silicon-based waste solar cells. J Mater Cycles Waste Manag 25, 2407–2416 (2023). https://doi.org/10.1007/s10163-023-01698-5
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DOI: https://doi.org/10.1007/s10163-023-01698-5