A study of interactions and flotation of wolframite with octyl hydroxamate

Hu, Youwang; Wang, D.; Xu, Zhenghe

doi:10.1016/s0892-6875(97)00041-1

Cited by 45 publications

(15 citation statements)

References 8 publications

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“…These species might adsorb onto quartz surfaces via two potential approaches. The positively charged Fe 2+ /Mn 2+ and was similar to the interaction between wolframite and OHA previously documented [6,26].…”

Section: Flotation Mechanism Of Quartzsupporting

confidence: 82%

“…These changes indicate that a chemisorption process was occurring during the interaction of OHA onto the quartz surface in the dissolved solution of wolframite. The chelating group of OHA was able to bond with metal ions coated onto the quartz surface and formed stable Fe 2+ /Mn 2+ chelate compounds, which was similar to the interaction between wolframite and OHA previously documented [6,26]. Comparing the spectra of quartz in the dissolved solution of wolframite to distilled water, the metal-OHA complexes occurred on the quartz surface.…”

Section: Ft-ir Spectra Analysissupporting

confidence: 78%

“…Minerals 2017, 7, 186 10 of 13 was similar to the interaction between wolframite and OHA previously documented [6,26].…”

Section: Ft-ir Spectra Analysissupporting

confidence: 76%

“…Therefore, OHA might chemisorb on activated quartz surfaces through a covalent bond, which is consistent with the results revealed by FT-IR analysis. The oxygen atoms from carbonyl (C=O) and hydroxyl (N-OH) of OHA had a high affinity to bonding with the adsorbed Fe 2+ /Mn 2+ ions on quartz surfaces, and formed stable iron and manganese hydroxamate complexes [6,25]. The potential interactions are presented in Scheme 3.…”

Section: Flotation Mechanism Of Quartzmentioning

confidence: 99%

“…Previous studies indicate that these anionic collectors can interact with metal ions on the wolframite surface and increase the mineral hydrophobicity [5][6][7][8]. Quartz is the major gangue mineral associated with fine wolframite in the flotation concentrate.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Quartz on the Flotation of Fine Wolframite with Octyl Hydroxamic Acid

et al. 2017

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Abstract:The influence of quartz on the flotation of fine wolframite using octyl hydroxamic acid (OHA) as the collector was investigated by micro-flotation tests, inductively coupled plasma (ICP) measurements, adsorption experiments, zeta potential, and Fourier transform infrared spectroscopy (FT-IR) analysis. Micro-flotation tests showed that a large difference in floatability existed between fine wolframite and quartz in the pH range of 7.0 to 10.0. However, in a synthetic mixture, the flotation separation of fine wolframite from quartz became more difficult as the particle size of the latter decreased. When a dissolved solution of wolframite was used as the flotation medium, quartz floatability improved significantly. Zeta potentials of quartz particles shifted positively in the dissolved solution of wolframite compared to distilled water, especially at a pH level of 7.0-10.0, which was attributed to the metal ions dissolved from the wolframite being adsorbed onto the quartz surface. The surface activation of quartz led to an increase in the OHA adsorption and made the surface hydrophobic. FT-IR analysis further demonstrated that OHA could adsorb onto the activated quartz surface through a dominantly chemical process.

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Section: Flotation Mechanism Of Quartzsupporting

confidence: 82%

Section: Ft-ir Spectra Analysissupporting

confidence: 78%

“…Minerals 2017, 7, 186 10 of 13 was similar to the interaction between wolframite and OHA previously documented [6,26].…”

Section: Ft-ir Spectra Analysissupporting

confidence: 76%

Section: Flotation Mechanism Of Quartzmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%