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Minerals 2017, 7(7), 113; https://doi.org/10.3390/min7070113

The Activation Mechanism of Bi3+ Ions to Rutile Flotation in a Strong Acidic Environment

1
School of Minerals Processing & Bioengineering, Central South University, Changsha 410083, China
2
Key Lab of Biohydrometallurgy of Ministry of Education, Changsha 410083, China
3
School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
*
Author to whom correspondence should be addressed.
Received: 8 June 2017 / Revised: 27 June 2017 / Accepted: 28 June 2017 / Published: 2 July 2017
(This article belongs to the Special Issue Flotation Chemistry)
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Abstract

Lead hydroxyl compounds are known as rutile flotation of the traditional activated component, but the optimum pH range for flotation is 2–3 using styryl phosphoric acid (SPA) as collector, without lead hydroxyl compounds in slurry solution. In this study, Bi3+ ions as a novel activator was investigated. The results revealed that the presence of Bi3+ ions increased the surface potential, due to the specific adsorption of hydroxyl compounds, which greatly increases the adsorption capacity of SPA on the rutile surface. Bi3+ ions increased the activation sites through the form of hydroxyl species adsorbing on the rutile surface and occupying the steric position of the original Ca2+ ions. The proton substitution reaction occurred between the hydroxyl species of Bi3+ ions (Bi(OH)n+(3−n)) and the hydroxylated rutile surface, producing the compounds of Ti-O-Bi2+. The micro-flotation tests results suggested that Bi3+ ions could improve the flotation recovery of rutile from 61% to 90%, and from 61% to 64% for Pb2+ ions. View Full-Text
Keywords: rutile activation flotation; styryl phosphoric acid; Strong acidic environment; activation sites; hydroxyl compound rutile activation flotation; styryl phosphoric acid; Strong acidic environment; activation sites; hydroxyl compound
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Xiao, W.; Cao, P.; Liang, Q.; Peng, H.; Zhao, H.; Qin, W.; Qiu, G.; Wang, J. The Activation Mechanism of Bi3+ Ions to Rutile Flotation in a Strong Acidic Environment. Minerals 2017, 7, 113.

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