Abstract
The activation mechanism of lead ions (Pb2+) in perovskite flotation with an octyl hydroxamic acid collector was systematically investigated using microflotation experiments, zeta-potential measurements, adsorption tests, Fourier transform infrared (FT-IR) analysis, and X-ray photoelectron spectroscopy (XPS) analysis. The results of microflotation experiments and adsorption tests indicate that the presence of Pb2+ can promote the adsorption of octyl hydroxamic acid (OHA) on the perovskite surface and enhance the flotability of perovskite under weakly acidic conditions. The maximum recovery of 79.62% was obtained at pH 6.5 in the presence of Pb2+, and the maximum recovery of 57.93% was obtained at pH 5.7 without Pb2+. At pHs below 7, lead species are mainly present as Pb2+ and PbOH+ in the solution; besides this, the relative content of titanium increases on the perovskite surface. The adsorption of Pb2+ and PbOH+ on the perovskite surface makes the zeta-potential of perovskite shift positively, and increases the number of activated sites on the perovskite surface. FT-IR and XPS analyses confirm that OHA chemisorbs on the surface of Pb2+-activated perovskite and forms hydrophobic Pb-OHA complexes, which improve the flotability of perovskite.
Highlights
Titanium and titanium alloys have extensive applications, such as in aerospace, national defense, transportation, medical devices, and national economic production as important strategic resources [1,2,3,4,5]
The objective of this study is to explore the effects of lead ions on perovskite flotability and the activation mechanism of lead ions in perovskite flotation with octyl hydroxamic acid collector through microflotation experiments, zeta-potential measurements, adsorption tests, Fourier transform infrared (FT-IR) analysis and
The results of microflotation and adsorption tests indicate that the presence of Pb2+ can promote the adsorption of octyl hydroxamic acid (OHA) on the surface andsurface enhanceand the enhance flotabilitythe of perovskite in perovskite a wide pH range
Summary
Titanium and titanium alloys have extensive applications, such as in aerospace, national defense, transportation, medical devices, and national economic production as important strategic resources [1,2,3,4,5]. More than 95% of China’s titanium resource deposits are distributed over the PanXi area (Panzhihua and Xichang, Sichuan province), which mostly exists in vanadium–titanium magnetite ore [4,5,8,9]. When vanadium–titanium magnetite concentrate is smelted in a blast furnace, the titanium is mostly concentrated in the perovskite phase (mainly CaTiO3 ) of blast furnace slag in the process of. The blast furnace slag is an important synthetic titanium resource, with a TiO2 grade of approximately 20–25% [10,11,12]. The annual production of titanium-bearing blast furnace slag is more than 3.0 × 106 tons; a large amount of slag accumulation leads to the waste of titanium resources and serious environmental pollution [13]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
