Flotation separation and interfacial interaction mechanisms of millimeter-scale Cu/Al foils from spent lithium-ion batteries

Yongwei Wang

doi:10.1016/j.mineng.2026.110749

Flotation separation and interfacial interaction mechanisms of millimeter-scale Cu/Al foils from spent lithium-ion batteries

2026-08-08

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PRE

AI

Y

Yongwei Wang

L

Lijue Wang

S

Shen’ao Zhang

J

Junhui Chen

J

Junwei Han *

DOI：10.1016/j.mineng.2026.110749

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• Flotation directly separates millimeter-sized (>0.5 mm) Cu/Al foils. • Optimum flotation gives Cu 89.76 % (rec.92.92 %) and Al 91.32 % (rec.97.61 %). • Na2S selectively enhances IAX adsorption on Cu foil. • Flaky Cu foils show 85 % collision vs 69 % spheres. • Na2S + IAX reduces three-phase contact time on Cu from 108 to 88 ms.

Keywords:

Spent lithium‑ion battery recycling

Copper and aluminum foils

Flotation separation

Selective sulfidation

Collision mechanism

Flotation separation and interfacial interaction mechanisms of millimeter-scale Cu/Al foils from spent lithium-ion batteries

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