A review on pyrrhotite oxidation

Belzile, Nelson; Chen, Yuwei; Cai, Meifang; Li, Yuerong

doi:10.1016/j.gexplo.2004.03.003

Cited by 272 publications

(173 citation statements)

References 55 publications

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“…However, when the pyrrhotite is conditioned under the nitrogen atmosphere for 20 min, the Fe species and their relevant contents are similar to that of untreated pyrrhotite. Pyrrhotite is a reactive sulfide mineral and is highly prone to oxidation [6,22]. The extent of oxidation affects the flotation performance of pyrrhotite.…”

Section: Resultsmentioning

confidence: 99%

“…Conditioning can effectively detach chlorite slimes from pyrrhotite surfaces, resulting in enhanced flotation recovery of pyrrhotite. When mixed minerals were conditioned under the natural atmosphere, a faster conditioning speed and longer conditioning time decreased Pyrrhotite is a reactive sulfide mineral and is highly prone to oxidation [6,22]. The extent of oxidation affects the flotation performance of pyrrhotite.…”

Section: Discussionmentioning

confidence: 99%

“…Pyrrhotite is one of the most abundant sulfide minerals [6]. Furthermore, it is often found in nickel sulfide ores and associated with valuable minerals, which suggests that pyrrhotite losses result in significant losses of nickel minerals [7].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Conditioning on the Flotation of Pyrrhotite in the Presence of Chlorite

et al. 2017

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Abstract:The influence of conditioning on the flotation of pyrrhotite in the presence of chlorite was investigated through flotation tests, sedimentation tests, and X-ray photoelectron spectroscopy (XPS) analysis. The flotation results show that chlorite slimes dramatically impair the flotation of pyrrhotite. Sedimentation and flotation tests reveal that conditioning can effectively remove chlorite slimes from pyrrhotite surfaces, resulting in an enhanced flotation recovery of pyrrhotite. When mixed minerals were conditioned under the natural atmosphere, a faster conditioning speed and longer conditioning time decreased the flotation recovery of pyrrhotite. However, when mixed minerals were conditioned under a nitrogen atmosphere, a more intensive conditioning process provided better flotation results. XPS analyses illustrate that a faster conditioning speed and longer conditioning time under the natural atmosphere accelerates the oxidation of pyrrhotite, leading to a decrease in the flotation recovery of pyrrhotite.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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The Effect of Conditioning on the Flotation of Pyrrhotite in the Presence of Chlorite

et al. 2017

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“…Both O 2 and Fe 3+ are known to be oxidising agents of pyrrhotite (Hamilton and Woods, 1981;Janzen, 1996;Belzile et al, 2004) and so the presence of both these species within the pyrrhotite structure needs to be evaluated. Fe 3+ was noted by Janzen (1996) to be a much stronger oxidising agent than O 2 .…”

Section: Mineral Chemistrymentioning

confidence: 99%

“…Pyrrhotite is a metallic conductor that is highly prone to oxidation (Rand, 1977;Belzile et al, 2004;Ekmekci et al, 2010). The effect of oxidation on flotation performance however, differs according to the degree of oxidation.…”

Section: Introductionmentioning

confidence: 99%

The flotation of magnetic and non-magnetic pyrrhotite from selected nickel ore deposits

Becker

Villiers

Bradshaw

2010

Minerals Engineering

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a b s t r a c tThe non-stoichiometric sulfide mineral pyrrhotite (Fe (1Àx) S), common to many nickel ore deposits, occurs in different crystallographic forms and compositions. A series of pyrrhotite samples derived from Canada, South Africa and Botswana whose mineralogy is well characterised, were selected here in order to develop the relationship between mineralogy and flotation performance. Using both oxygen uptake and microflotation tests, the behaviour of the different pyrrhotite types was compared in terms of the effect of pH and collector addition. Non-magnetic pyrrhotite was less reactive in terms of its oxygen uptake and showed the best collectorless flotation recovery. Magnetic pyrrhotite was more reactive and showed poor collectorless flotation performance that could be improved with the addition of xanthate collector, but only if it was not already passivated. These differences are interpreted to be a result of pyrrhotite mineralogy. This has implications that may aid the manipulation of pyrrhotite flotation performance in processing operations.

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Magnetic anomalies associated with abundant production of pyrrhotite in a sulfide deposit in the Okinawa Trough, Japan

Honsho

Yamazaki

Ura

et al. 2016

Geochem Geophys Geosyst

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We report here results from a deep‐sea magnetic survey using an autonomous underwater vehicle over the Hakurei hydrothermal site, in the middle Okinawa Trough. Magnetic inversion revealed that the Hakurei site is associated with well‐defined high‐magnetization zones distributed within a broad low‐magnetization zone. Results from rock magnetic measurements, performed on sulfide ore samples obtained by drilling, showed that some samples possessed extremely high natural remanent magnetization (NRM) (as much as 6.8–953.0 A/m), although most of the measured samples had much lower NRM. These high‐NRM samples were characterized by high Königsberger ratios (101−103), indicating much larger NRM than induced magnetization, and contained pyrrhotite as the only magnetic mineral. This suggests that NRM carried by pyrrhotite is the source of the observed magnetic anomalies. The wide range of NRM intensity was considered to be due to a highly heterogeneous distribution of pyrrhotite, because pyrrhotite was commonly identified in both the high‐NRM and low‐NRM samples. Pyrrhotite production may have been occasionally drastically increased, with highly magnetic ores formed as a result. Rapid burial of active vents may result in the creation of an extensive reducing environment under the seafloor, which is favorable to pyrrhotite production, and may also prevent oxidation of pyrrhotite by isolating it from seawater. Because the magnetization intensity of sulfide ores was highly variable, it would not be straightforward to estimate the quantity of ore deposits from the magnetic anomalies. Nevertheless, this study demonstrates the usefulness of magnetic surveys in detecting hydrothermal deposits.

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A review on pyrrhotite oxidation

Cited by 272 publications

References 55 publications

The Effect of Conditioning on the Flotation of Pyrrhotite in the Presence of Chlorite

The Effect of Conditioning on the Flotation of Pyrrhotite in the Presence of Chlorite

The flotation of magnetic and non-magnetic pyrrhotite from selected nickel ore deposits

Magnetic anomalies associated with abundant production of pyrrhotite in a sulfide deposit in the Okinawa Trough, Japan

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