Yang Cao, Lei Sun
The presence of Pb2+ can activate cassiterite flotation; however, its biotoxicity may lead to environmental issues. Therefore, this study investigates the feasibility of using Zn2+ instead of Pb2+ in cassiterite flotation. The effects and mechanism of Zn2+ on the floatability of cassiterite were analyzed using benzohydroxamic acid (BHA) as the collector. Results indicated a higher recovery of cassiterite in the presence of Zn2+ than in the presence of Pb2+. The maximum recovery of cassiterite in the presence of Zn2+ reached 90.54%, attributed to an increase in the adsorption quantity of BHA on the cassiterite surface with Zn2+. Further chemical analyses indicated that BHA and Zn2+ were primarily present in the form of BHA molecules and Zn(OH)+ at pH 7.5–8.0. X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) confirmed that Zn(OH)+ reacted with OH– on the cassiterite surface to form a Zn-O bond. This metallic bonding, in combination with BHA molecules, generated a new chelate ring structure (-Sn-O-Zn-BHA), allowing for a firmer attachment of BHA on the cassiterite surface, resulting in increased cassiterite recovery.
@article{1ff647af-c20b-494a-add2-9980736419a0,
title={Activation mechanism of zinc ions in cassiterite flotation 2020 Minerals En},
author={Yang Cao and Lei Sun},
year={2026},
language={en}
}TY - JOUR TI - Activation mechanism of zinc ions in cassiterite flotation 2020 Minerals En AU - Yang Cao AU - Lei Sun PY - 2026 LA - en ER -
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