Study of pyrochlore surface chemistry effects on collector adsorption by TOF-SIMS

Chelgani, S. Chehreh; Hart, Brian; Marois, J.; Ourriban, M.

doi:10.1016/j.mineng.2012.07.014

Cited by 22 publications

(3 citation statements)

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“…Time‐of‐flight SIMS surface chemical analyses identified that the grains reporting to the tail (higher matrix Fe content) had a higher content of FeOH (along with other FeOx species) (Figure A) and significantly less tallow diamine (TDM‐1) collector on their surface (Figure B). The TOF‐SIMS surface analyses established a link between mineral Fe content, the degree of surface oxidation, collector loading, and the observed poor recovery of high Fe pyrochlore grains …”

Section: Statistical Comparisons By Mineral Phasementioning

confidence: 95%

“…In a Niobec Mines pyrochlore flotation plant survey, the composition of the pyrochlore grains reporting to the tails was identified as having a higher concentration of Fe than those reporting to the concentrate. A statistical compositional analyses of some +200 grains from the concentrate and tails samples showed that the Fe content was not related to Fe‐rich inclusions but rather occurred in the mineral matrix, substituting for Na or Ca.…”

Section: Statistical Comparisons By Mineral Phasementioning

confidence: 99%

“…A and B, Vertical box plots of ToF‐SIMS normalised intensity for FeOH and collector (TDM‐1) on the surface of high Fe (Fe‐pyrochlore) and low Fe pyrochlore (pyrochlore) grains from the Niobec flotation plant . C and D, High‐resolution XPS spectra for grains with high Fe content (Fe‐pyrochlore, C) vs low Fe content (pyrochlore, D) after conditioning for 30 minutes in oxygen over saturated water.…”

Section: Statistical Comparisons By Mineral Phasementioning

confidence: 99%

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The development of statistical ToF‐SIMS applied to minerals recovery by froth flotation

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Gerson²,

Biesinger

et al. 2017

Surface & Interface Analysis

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The role of surface chemistry in recovery of minerals is central to several processes such as froth flotation, leaching, and electrostatic separation. In separation of base metals (eg, Cu, Pb, Zn, and Ni) by froth flotation of their minerals, usually sulphides, the attachment of these mineral particles, after hydrophobic collector addition, to air bubbles is used in operation. The stability of this bubble/particle attachment in both pulp and froth phases is dependent on the hydrophobic/hydrophilic ratio of surface species on individual mineral particle surfaces. The surfaces of individual mineral particles are a complex, distinctly nonuniform array of hydrophobic collector molecules and hydrophilic species (eg, oxidation products, adsorbed ions, fine particles, and precipitates). Hence, this ratio varies widely between different particles of the same mineral. It has been shown to determine whether particles report, correctly or incorrectly, to concentrate or tail (residue). To improve poor flotation recovery or grade, the analysis needed is the variation of this ratio by particle and as a statistical distribution between different mineral phases across a flotation circuit (eg, feed, successive concentrates, and tails). This requires surface analysis of a large number of particles with high spatial resolution and chemical speciation. In this Surface Science Western special issue article, methods to achieve this, using time-of-flight secondary ion mass spectrometry and principal component analysis, developed between the Ian Wark Research Institute and Surface Science Western over 25 years are reviewed with applications to flotation. They are equally applicable to interferences in leaching, extraction, and electrostatic separation processes.

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Section: Statistical Comparisons By Mineral Phasementioning

confidence: 95%

Section: Statistical Comparisons By Mineral Phasementioning

confidence: 99%

Section: Statistical Comparisons By Mineral Phasementioning

confidence: 99%

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