Adsorption of copper sulphate on PGM-bearing ores and its influence on froth stability and flotation kinetics

Nyabeze, W.; McFadzean, B.

doi:10.1016/j.mineng.2016.02.004

Cited by 32 publications

(9 citation statements)

References 29 publications

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“…This resulted in improved recovery, due to improved froth stability and improved grade due to less entrainment. Another study by Nyabeze and McFadzean [72] showed that the use of CuSO 4 had a similar effect on the froth and not on the pulp phase recovery, as expected. This showed that the addition of CuSO 4 destabilised or improved the drainage effect on both Merensky and UG2 ores.…”

Section: Entrainmentsupporting

confidence: 70%

Challenges Related to the Processing of Fines in the Recovery of Platinum Group Minerals (PGMs)

et al. 2021

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In order to increase the recovery of PGMs by flotation, it is necessary to optimise the liberation of the key minerals in which the platinum group elements (PGEs) are contained which include sulphides, arsenides, tellurides, and ferroalloys among others, while at the same time ensuring the optimal depression of gangue minerals. In order to achieve this, comminution circuits usually consist of two or three stages of milling, in which the first stage is autogeneous, followed by ball milling. Further liberation is achieved in subsequent stages using ultra-fine grinding. Each comminution stage is followed by flotation in the so-called MF2 or MF3 circuits. While this staged process increases overall recoveries, overgrinding may occur, hence creating problems associated with fine particle flotation. This paper presents an overview of the mineralogy of most of the more significant PGM ores processed in South Africa and the various technologies used in comminution circuits. The paper then summarises the methodology used in flotation circuits to optimise recovery of fine particles in terms of the collectors, depressants, and frothers used. The effect of entrainment, slimes coating, changes in rheology caused by the presence of a significant amount of fines and of chromite recovery is addressed.

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Section: Entrainmentsupporting

confidence: 70%

Challenges Related to the Processing of Fines in the Recovery of Platinum Group Minerals (PGMs)

et al. 2021

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“…However, the addition of copper sulphate can also contribute to the recovery of gangue minerals due to the inadvertent activation of these minerals [28,29]. It also appears to be playing a role in affecting the stability of the froth and flotation kinetics [30]. A further complicating factor on South African operations is to ensure that the chromite concentration in the concentrate is less than ≈3% so that it does not negatively impact on the downstream smelting process.…”

Section: Processing Of the Oresmentioning

confidence: 99%

The Geological Occurrence, Mineralogy, and Processing by Flotation of Platinum Group Minerals (PGMs) in South Africa and Russia

O’Connor

Alexandrova

2021

Minerals

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Russia and South Africa are the world’s leading producers of platinum group elements (PGEs). This places them in a unique position regarding the supply of these two key industrial commodities. The purpose of this paper is to provide a comparative high-level overview of aspects of the geological occurrence, mineralogy, and processing by flotation of the platinum group minerals (PGMs) found in each country. A summary of some of the major challenges faced in each country in terms of the concentration of the ores by flotation is presented alongside the opportunities that exist to increase the production of the respective metals. These include the more efficient recovery of minerals such as arsenides and tellurides, the management of siliceous gangue and chromite in the processing of these ores, and, especially in Russia, the development of novel processing routes to recover PGEs from relatively low grade ores occurring in dunites, black shale ores and in vanadium-iron-titanium-sulphide oxide formations.

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“…[ 253 ] Furthermore, hydroxides of both Cu and Ni were also detected using XPS, which is likely to be a byproduct of electroplating. For example Cu(OH) 2 is known to form in the presence of copper sulfate, [ 254 ] which was used as the electrolyte for the Cu‐plated electrode. The presence of nickel hydroxide was desirable for this study, as it was postulated by the authors that the oxygen atom from the hydroxide was able to interact with the hydroxyl group of glucose, and thus promoted the dehydrogenation of glucose.…”

Section: Additive Manufacturing Of Ec Biosensorsmentioning

confidence: 99%

Additive Manufacturable Materials for Electrochemical Biosensor Electrodes

Elbadawi

Ong

Pollard

et al. 2020

Adv Funct Materials

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With the impending Industrial Revolution 4.0, the information produced by sensors will be central in many applications. This includes the healthcare sector, where affordable healthcare and precision medicine are highly sought after. Electrochemical sensors have the potential to produce affordable, high sensitivity and specificity, intuitive, and rapid point‐of‐care diagnostics. Underpinning these achievements is the choice of material and the fabrication thereof. In this review, the different types of materials used in electrochemical biosensors are reported, with a focus on synthetic conductive materials. The review demonstrates that there is an abundance of materials to select from, and compositing different types of materials further widens their applicability in biosensors. In addition, the fabrication of such materials using the state‐of‐the‐art of fabrication technology, additive manufacturing (AM), is also detailed. The need for compositing is evident in AM, as the feedstock for certain AM technologies is inherently nonconductive. Both material choice and fabrication technologies limitations are also discussed to highlight opportunities for growth. The review highlights how recent technological advancements have the potential to drive the healthcare industry toward achieving its primary goals.

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Adsorption of copper sulphate on PGM-bearing ores and its influence on froth stability and flotation kinetics

Cited by 32 publications

References 29 publications

Challenges Related to the Processing of Fines in the Recovery of Platinum Group Minerals (PGMs)

Challenges Related to the Processing of Fines in the Recovery of Platinum Group Minerals (PGMs)

The Geological Occurrence, Mineralogy, and Processing by Flotation of Platinum Group Minerals (PGMs) in South Africa and Russia

Additive Manufacturable Materials for Electrochemical Biosensor Electrodes

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