Activation Mechanism of Lead Ions in the Flotation of Rutile Using Amyl Xanthate as a Collector
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In this work, a new flotation strategy was proposed for the flotation of rutile. In this strategy, rutile was activated by Pb(NO3)2 and then floated with amyl xanthate (AX) as a collector at pH 8. Pb(OH)+ was the dominant lead species in the solution at pH 8 and is believed to be the major species reacting with the rutile surface. Time-of-flight secondary ion mass spectrometry (TOF-SIMS) study revealed that the lead activation products were well distributed on the rutile surface, and AX− could further bind with the Pb atom on the Pb-activated rutile surface. In this regard, the Pb-activated rutile could be floated by AX. Furthermore, X-ray photoelectron spectroscopy (XPS) analysis indicated that Pb(OH)2 was generated on the Pb-activated rutile surface. The electron transfer during the adsorption of the AX− on the Pb-activated rutile surface was also investigated by XPS analysis.
KeywordsRutile Activation Lead ion Flotation TOF-SIMS
We appreciate the financial support from the Analysis and Testing Foundation of Kunming University of Science and Technology (China).
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Conflict of Interest
On behalf of all authors, the corresponding author states that there is no conflict of interest.
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