The effect of amine type, pH, and size range in the flotation of quartz

Vieira, Ana Cristina; Peres, Antônio Eduardo Clark

doi:10.1016/j.mineng.2007.03.013

Cited by 121 publications

(45 citation statements)

References 12 publications

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“…However, the performance of ether monoamine or ether diamine concerning on the flotation of quartz depends on the particle size. Viera and Peres (2007) demonstrated that ether monoamines are effective flotation reagents for fine quartz (À74 + 38 lm) but ether diamine work best for coarse (À297 + 150 lm) and medium (À150 + 74 lm) size fractions of quartz. Therefore, primary amines, ether monoamines and ether diamines were studied to establish the most economical reagent for separating palygorskite from silicates and between silicates.…”

Section: Selective Separation Between Palygorskite From Silicatesmentioning

confidence: 99%

Selective flotation of silicates and Ca-bearing minerals: The role of non-ionic reagent on cationic flotation

Filippov

Duverger

Filippova

et al. 2012

Minerals Engineering

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Section: Selective Separation Between Palygorskite From Silicatesmentioning

confidence: 99%

Selective flotation of silicates and Ca-bearing minerals: The role of non-ionic reagent on cationic flotation

Filippov

Duverger

Filippova

et al. 2012

Minerals Engineering

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“…As with tarnished particles, higher collector additions may be required to float coarser particles, as demonstrated in this study. However, studies with quartz have shown that extra collector added to float coarse or tarnished material may instead be consumed by fine particles with large surface areas (Vieira and Peres, 2007).…”

Section: Collectormentioning

confidence: 99%

The behaviour of free gold particles in a simulated flash flotation environment

McGrath¹,

Eksteen²,

Heath³

2015

J. S. Afr. Inst. Min. Metall.

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The behaviour of free gold in flash flotation is currently poorly understood (Dunne 2005), especially when in competition with a gravity recovery unit in a closed-loop milling circuit, although an overlap has been identified in which both units can recover particles between 212 μm and 38 μm. This research aims to identify parameters that may determine whether free gold particles will be recovered by either unit in this competitive size range. Identifying the impact of variables such as mineralogy, reagents, mechanical factors, and physical characteristics (such as size, shape, surface area, elemental composition, etc.) on floatability will enable optimization of combined gravity and flash flotation circuits. This paper, the second in a series, is focused on the comparison of free gold and pure gold powder recoveries in laboratory flotation tests as a function of collector (potassium amyl xanthate, or PAX) addition. The first paper established the method used to study the behaviour and characterize the ultimate content of free gold recoverable by flash flotation. The knowledge gained from this research contributes to a better understanding of the impact of particle size, milling effects, residence time, and collector additions upon the recovery of free gold in the milling circuit. BackgroundSeveral plants use batch centrifugal concentrators (BCCs) and flash flotation unit operations in a closed-loop milling circuit as an option for processing complex ores containing free gold as well as gold locked in a sulphide matrix. BCC circuits are used to recover the larger particles of free gold, roughly +106 μm, while a flash flotation circuit produces a sulphide concentrate encompassing smaller free gold particles (-106 μm) and gold contained in sulphides. Based on plant surveys undertaken by the Curtin University Gold Technology Group (2008), the two units will tend to compete for particles in the -212 +38 μm range, as shown in Figure 1.Because knowledge of the behaviour of free gold recovery in a closed-loop milling circuit with parallel flash flotation and gravity recovery units is limited, an improved understanding of the behaviour of gold in this situation will provide greater confidence in the application of such processes to the processing of complex gold ores. Gravity concentrationGravity-recoverable gold (GRG) is a specific term that refers to free gold reporting to the concentrate stream with a small mass yield if separations are performed using BCCs. GRG isThe behaviour of free gold particles in a simulated flash flotation environment by T.D.H. McGrath*, J.J. Eksteen*, and J. Heath † SynopsisA reliable laboratory method to characterize the response of free gold particles to flash flotation conditions has been developed. The test has been performed on free milling gold ores as well as synthetic ores, using either a gravity concentrate or gold powder as the gold source, to assess the floatability of gold particles. Trends in free gold flotation kinetics, as well as size and milling effects, were identified for ...

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“…High-efficiency separation of the muscovite from quartz ore has been focused on by researchers for a long time [4,5]. In recent years, fluorine-free flotation has been developed to separate muscovite with quartz [6,7], but the flotation technique is only suitable for separating liberated ores, although separation efficiency of muscovite and quartz is not high enough [8,9]. Moreover, fluoric acid leaching shows great effects on removing muscovite (less than 0.2 wt %) within quartz [10,11].…”

Section: Introductionmentioning

confidence: 99%

Dissolution Behaviors of Trace Muscovite during Pressure Leaching of Hydrothermal Vein Quartz Using H2SO4 and NH4Cl as Leaching Agents

et al. 2018

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Dissolution behaviors of trace muscovite during pressure leaching of hydrothermal vein quartz using H 2 SO 4 and NH 4 Cl as leaching agents have been studied by means of optical and electronic microscopes. Phase transformations of pure muscovite during calcination and the pressure leaching were analyzed by powder X-ray diffraction (XRD) and thermal analysis (TG-DSC), which are used for indirectly discussing dissolution mechanisms of the trace muscovite. Structure damages of trace muscovite are caused by calcination, and further developed during pressure leaching of the quartz sand using H 2 SO 4 and NH 4 Cl as leaching agents. The trace muscovite is dissolved, and then efficiently separated from quartz sand by coupling effects of calcination and fluorine-free pressure leaching.

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The effect of amine type, pH, and size range in the flotation of quartz

Cited by 121 publications

References 12 publications

Selective flotation of silicates and Ca-bearing minerals: The role of non-ionic reagent on cationic flotation

Selective flotation of silicates and Ca-bearing minerals: The role of non-ionic reagent on cationic flotation

The behaviour of free gold particles in a simulated flash flotation environment

Dissolution Behaviors of Trace Muscovite during Pressure Leaching of Hydrothermal Vein Quartz Using H2SO4 and NH4Cl as Leaching Agents

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