Pyrite activation in amyl xanthate flotation with nitrogen

Miller, Jan D.; Kappes, R.; Simmons, Gloria; LeVier, Kristin

doi:10.1016/j.mineng.2005.09.017

Cited by 31 publications

(9 citation statements)

References 5 publications

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“…2 (Ralston, 1991). Miller et al (2006) reported that in a 1 Â 10 À3 M potassium amyl xanthate (PAX) solution, a hydrophobic pyrite surface state was established at potentials higher than 0.19 V (vs. SHE) which corresponds to the reversible potential of the xanthate/dixanthogen couple. Therefore, depending upon the E h , the mineral surface may facilitate collector adsorption leading to flotation.…”

Section: Oxidantsmentioning

confidence: 99%

The depression of pyrite in selective flotation by different reagent systems – A Literature review

Peng

Lauten³

2016

Minerals Engineering

182

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Section: Oxidantsmentioning

confidence: 99%

The depression of pyrite in selective flotation by different reagent systems – A Literature review

Peng

Lauten³

2016

Minerals Engineering

182

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“…Designations of the combinations of experimental conditions are summarized in Table 2. Compared with natural mineral investigations with values such as 1200 rpm impeller speed and 1.8-5.4 l/min and higher aeration (Forrest et al, 2001;Lins and Adamian, 1993;Miller et al, 2006), the low regimes chosen for these parameters is based on initial microflotation and the Leeds cell exploratory trials. Above the range of 500 rpm agitation and 1000 ml/min aeration, the turbulence reached the pulp surface.…”

Section: Flotation Investigationmentioning

confidence: 99%

Investigation of froth flotation for beneficiation of printed circuit board comminution fines

Ogunniyi

Vermaak

2009

Minerals Engineering

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a b s t r a c tFroth flotation for beneficiation of printed circuit board comminution fines was investigated in this work, via reverse flotation under a scheme described as natural hydrophobic response. With no reagents, the scheme employed variation of kinetic parameters of airflow rate and impeller speed to optimize metallic enrichment of the sink. The impeller energy and aeration rate required to keep the pulp in suspension and avoid excessive turbulence were found to be much lower compared with conventional mineral flotation. The natural hydrophobic response was found to exist, and stable froth was observed even without the use of any frother. It was submitted that the dynamic froth stability observed is due to fine particle stabilization. Mass pulls obtained were high and cumulative mass pull under the varying kinetic regimes were found to fit very well to the general first order kinetics. The extents of fit, the sink enrichment and the recovery in respect of metallic values were assessed to evaluate the beneficiation performance. Many of the metallic elements were found to concentrate into the sink, while some prefer the froth phase. Notably, gold and palladium were among the best recovered to the sink; with about 64% recovery at enrichment ratio of 3.1 (676 ppm actual assay) for Au. The flotation scheme proved effective for PCB comminution fines, and performance improvement also looks very feasible.

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“…However, Cu ions released from ores can accidently activate the pyrite surfaces and induce pyrite flotation . When xanthate is added as a collector this activation may influence the species responsible for pyrite flotation …”

Section: Introductionmentioning

confidence: 99%

Cryo‐XPS study of xanthate adsorption on pyrite

Deng

Karpuzov

Liu

et al. 2012

Surface & Interface Analysis

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The adsorption of xanthate on pyrite has been extensively studied. However, the adsorption mechanisms remain a subject of controversy. Formation of both dixanthogen and metal-xanthate complexes has been suggested. In this study, both room temperature X-ray photoelectron spectroscopy (XPS) (RT-XPS) and liquid nitrogen temperature XPS (Cryo-XPS) were used to study interactions between pyrite and xanthate. While dixanthogen was not detected by RT-XPS, it was successfully identified through C1s and S 2p peaks using Cryo-XPS. The impact of pH and copper activation on adsorption of xanthate on pyrite was also investigated. It was found that at low pH, dixanthogen is the dominant species of xanthate adsorption on pyrite. At high pH, metal-xanthate complexes were found to be prevalent on pyrite surfaces, which are responsible for the surface hydrophobicity. Copper activation showed a significant effect on xanthate adsorption on Cu-activated pyrite, resulting in mostly the formation of Cu-xanthate complexes rather than dixanthogen, mainly in the form of Cu(I)-isopropyl xanthate complex (CuIPX).

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Pyrite activation in amyl xanthate flotation with nitrogen

Cited by 31 publications

References 5 publications

The depression of pyrite in selective flotation by different reagent systems – A Literature review

The depression of pyrite in selective flotation by different reagent systems – A Literature review

Investigation of froth flotation for beneficiation of printed circuit board comminution fines

Cryo‐XPS study of xanthate adsorption on pyrite

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