Impact of pulp rheological behavior on selective separation of Ni minerals from fibrous serpentine ores

Patra, Partha; Bhambhani, Tarun; Nagaraj, D.R.; Somasundaran, P.

doi:10.1016/j.colsurfa.2012.06.037

Cited by 35 publications

(21 citation statements)

References 8 publications

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“…Under these conditions rheology should not be a critical factor for flotation. However, clay minerals have added a complexity to the rheological behaviour of some flotation slurries, affecting grade and recovery . This has led to a recent interest in studying the rheology of flotation pulps, since the presence of a yield stress can affect gas dispersion, particle suspension, bubble‐particle collision, attachment, and detachment .…”

Section: Rheology In Mineral Processing Unit Operationsmentioning

confidence: 99%

“…The availability of easy‐to‐process ores is declining, and mining operations are being forced to process low grade, complex ores . This has brought additional challenges to mineral processing since very often these ores have to be ground to a finer particle size, and in some cases, they have a high clay mineral content, which leads to significant changes in mineral slurry rheology . Complex flow behaviours in slurries can affect most unit operations such as grinding, flotation, and dewatering .…”

Section: Introductionmentioning

confidence: 99%

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Slurry rheology in mineral processing unit operations: A critical review

2019

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Knowledge of slurry rheology in mineral processing is essential for the optimization of wet-grinding, dewatering, transport, and tailings management and it is becoming important in flotation due to the increasing need to process complex ores with a high clay mineral content. Slurries of these ores often display complex rheological behaviour even at low solids concentration, and traditional rheology measurements in mineral processing, such as yield stress and apparent viscosities, may not provide the critical information needed for process optimization. The objective of this paper is to provide a comprehensive review of some of the previous rheology studies performed at the bench, pilot plant, and industrial scale for different unit operations and to discuss the potential for alternative rheology measurements to provide a better insight into colloidal particle interactions in slurries with clay minerals. Firstly, the fundamentals of slurry rheology and the influence of colloidal particles are presented. Secondly, rheology measurements for suspensions are described briefly. Thirdly, a review of rheology studies in grinding, classification, flotation, dewatering, and tailings management is done, outlining possible ways of determining types of particle associations in slurries. Finally, recommendations for future research directions are provided.

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Section: Rheology In Mineral Processing Unit Operationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Slurry rheology in mineral processing unit operations: A critical review

2019

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“…Most investigators attribute the negative effect of clay minerals in flotation to slime coating (Edwards et al, 1980;Arnold and Aplan, 1986;Zhao, 2011), slurry viscosity (Merve Genc et al, 2012;Patra et al, 2012;Zhang and Peng, 2015), or entrainment (Wang and Peng, 2013;Liu and Peng, 2014). However, in a single study, they usually compared the negative effects of different clay minerals from one aspect.…”

Section: Introductionmentioning

confidence: 95%

The different effects of bentonite and kaolin on copper flotation

Wang

Peng

Nicholson

et al. 2015

Applied Clay Science

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“…The most common mechanisms discussed are high viscosity, and slime coating (Jorjani et al, 2011;Wei et al, 2013;Forbes et al, 2014) (Arnold and Aplan, 1986;, but it is still not clear which one of these mechanisms is more critical for influencing flotation performance. Patra et al (2012a) used positively charged chrysotile particles and inert nylon fibers to differentiate between the effect of slime coating and pulp rheology on the flotation response of copper and suggested that slime coatings may not be a dominant factor when compared to pulp rheology. Tabatabaei et al (2014) stated that the presence of non-sulphide gangue minerals such as carbonaceous material and clay minerals negatively affect the recovery of sulphides and the separation selectivity.…”

Section: Effect Of Clay Minerals On Flotationmentioning

confidence: 99%

Interactions of clay minerals and their effects on copper-gold flotation

Cruz¹

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The continuous depletion of mineral resources has resulted in the increased processing of low grade complex ores that in some cases contain clay minerals. These gangue minerals are often associated with ores containing copper and gold and can cause problems in mineral flotation. Some of the observations from industry when high clay ores are processed include the high flotation pulp viscosity, over-stable froth or absent froth, and lower grade and recovery. Clay minerals are small flat particles that occur in colloidal size ranges with charges on their surfaces that may change with pH. These characteristics allow them to interact with water, reagents and other gangue minerals present in flotation pulp. Given these properties and interactions it is Publications during candidature Peer reviewed journals publications relevant to the thesis:

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Impact of pulp rheological behavior on selective separation of Ni minerals from fibrous serpentine ores

Cited by 35 publications

References 8 publications

Slurry rheology in mineral processing unit operations: A critical review

Slurry rheology in mineral processing unit operations: A critical review

The different effects of bentonite and kaolin on copper flotation

Interactions of clay minerals and their effects on copper-gold flotation

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