Megan Becker
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View article: Critical minerals: Challenges and opportunities in platinum group mineral flotation
Critical minerals: Challenges and opportunities in platinum group mineral flotation Open
Platinum group minerals (PGMs) are critical for the green energy transition, playing key roles as catalysts in fuel cells and catalytic converters. Their limited global supply as well as geopolitical challenges further elevate their strate…
View article: Decoupling the effect of hydraulic oil contamination on the flotation performance of UG2 PGE ore and its interaction with alteration minerals
Decoupling the effect of hydraulic oil contamination on the flotation performance of UG2 PGE ore and its interaction with alteration minerals Open
Oil contamination inadvertently arising from underground mechanised South African platinum mines is known to compromise the subsequent flotation performance. Anecdotal observations suggest that this is further exacerbated in the presence o…
View article: Evaluation of recycled galvanised steel as a resource for Zn production
Evaluation of recycled galvanised steel as a resource for Zn production Open
The high reduction potential of zinc has enabled its extensive use in the steel industry as a protective galvanising coating. Galvanising, which consumes approximately 50-60% of the global production of zinc, significantly increases the li…
View article: A methodology for gangue management in the flotation of a PGM-bearing ore through laboratory tests, mineralogical analysis and circuit modelling
A methodology for gangue management in the flotation of a PGM-bearing ore through laboratory tests, mineralogical analysis and circuit modelling Open
With the ever-increasing demand for sustainability in the mineral processing industry, many operations are focusing on minimising their energy usage and maximising their smelter capacity. One approach to achieving this, is by ensuring conc…
View article: Machine Learning Demonstrates Dominance of Physical Characteristics over Particle Composition in Coal Dust Toxicity
Machine Learning Demonstrates Dominance of Physical Characteristics over Particle Composition in Coal Dust Toxicity Open
Mine dust has been linked to the development of pneumoconiotic diseases such as silicosis and coal workers' pneumoconiosis. Currently, it is understood that the physicochemical and mineralogical characteristics drive the toxic nature of du…
View article: The impact of coal mine dust characteristics on pathways to respiratory harm: investigating the pneumoconiotic potency of coals
The impact of coal mine dust characteristics on pathways to respiratory harm: investigating the pneumoconiotic potency of coals Open
Exposure to dust from the mining environment has historically resulted in epidemic levels of mortality and morbidity from pneumoconiotic diseases such as silicosis, coal workers’ pneumoconiosis (CWP), and asbestosis. Studies have shown tha…
View article: Development of a SEM-EDS-XRD Protocol for the Physicochemical and Automated Mineralogical Characterisation of Coal Dust Particles
Development of a SEM-EDS-XRD Protocol for the Physicochemical and Automated Mineralogical Characterisation of Coal Dust Particles Open
Exposure to coal dust from mining-related activities has historically been linked to several preventable but incurable respiratory diseases. Although the findings of numerous biological studies have determined that the physicochemical and …
View article: Mineralogical Factors Affecting the Dense Medium Separation of Nickel Sulfide Ores
Mineralogical Factors Affecting the Dense Medium Separation of Nickel Sulfide Ores Open
Dense medium separation (DMS) is often used to reject a large portion of gangue material upfront to create cost and energy savings during processing. As lower-grade ores with complex mineralogy are being increasingly exploited, the propert…
View article: Decoupling the effects of alteration on the mineralogy and flotation performance of Great Dyke PGE ores
Decoupling the effects of alteration on the mineralogy and flotation performance of Great Dyke PGE ores Open
Ores from a single deposit may exhibit extensive variability in their mineralogy and texture. The ability to quantify this variability and link it to mineral processing performance is one of the primary goals of process mineralogy. This st…
View article: Stable Isotope Imprints during Pyrite Leaching: Implications for Acid Rock Drainage Characterization
Stable Isotope Imprints during Pyrite Leaching: Implications for Acid Rock Drainage Characterization Open
The characterization of acid rock drainage (ARD) is traditionally based on mineralogical and geochemical techniques (e.g., Acid Base Accounting tests). The complexity of ARD processes warrants contribution of methods from various disciplin…
View article: A Mineral X-ray Linear Attenuation Coefficient Tool (MXLAC) to Assess Mineralogical Differentiation for X-ray Computed Tomography Scanning
A Mineral X-ray Linear Attenuation Coefficient Tool (MXLAC) to Assess Mineralogical Differentiation for X-ray Computed Tomography Scanning Open
X-ray computed tomography (XCT) is becoming one of the most important techniques in the geosciences. The technique relies on linear attenuation coefficient differences in order to reveal the internal structure of the rocks. In this work, w…
View article: The Robustness of the Gray Level Co-Occurrence Matrices and X-Ray Computed Tomography Method for the Quantification of 3D Mineral Texture
The Robustness of the Gray Level Co-Occurrence Matrices and X-Ray Computed Tomography Method for the Quantification of 3D Mineral Texture Open
Mineral textural quantification methods have become critical in both geosciences and mineral processing as mineral texture is a critical factor contributing to ore variability. However, the lack of objective mineral texture classification …
View article: S6: Magnetite bearing quartzite two point calibration
S6: Magnetite bearing quartzite two point calibration Open
3D mineral texture quantification method
View article: S5: Magnetite bearing quartzite with three-point (air – Cu – W) calibration
S5: Magnetite bearing quartzite with three-point (air – Cu – W) calibration Open
3D mineral texture quantification method
View article: MDPI Minerals: The robustness of the GLCM and XCT for quantification of 3D mineral texture
MDPI Minerals: The robustness of the GLCM and XCT for quantification of 3D mineral texture Open
Supplementary data list:S1 - Quartzite (air - Cu - W) three point calibrationS2 - Sandstone (air - Cu -W) three point calibrationS3 - Granite (air - Cu - W) three point calibrationS4 - Shale (air - Cu - W) three point calibrationS5 - Magne…
View article: S2: Sandstone with three-point (air – Cu – W) calibration
S2: Sandstone with three-point (air – Cu – W) calibration Open
3D mineral texture quantification method
View article: S1: Quartzite with three-point (air – Cu – W) calibration
S1: Quartzite with three-point (air – Cu – W) calibration Open
3D mineral texture quantification method
View article: S3: Granite with three-point (air – Cu – W) calibration
S3: Granite with three-point (air – Cu – W) calibration Open
3D Mineral texture quantification method
View article: S7: Magnetite bearing quartzite with no calibration
S7: Magnetite bearing quartzite with no calibration Open
3D mineral texture quantification method
View article: S4: Shale with three-point (air – Cu – W) calibration
S4: Shale with three-point (air – Cu – W) calibration Open
3D Mineral Texture quantification method
View article: Tempting Fate
Tempting Fate Open
Nuclear weapons hold out the promise of peace through the prospect of devastation.That is a dangerous bargain.The number of wars that have occurred when only one side has nuclear weapons suggest that it is also a fragile one.Regardless of …
View article: Developing a 3D mineral texture quantification method of drill core for geometallurgy
Developing a 3D mineral texture quantification method of drill core for geometallurgy Open
CITATION: Voigt, M.J. et al. 2019. Developing a 3D mineral texture quantification method of drill core for geometallurgy. Journal of the Southern African Institute of Mining and Metallurgy, 119(4):347-353. doi:10.17159/2411-9717/590/2019
View article: To Build or To Buy: Understanding the Determinants of Security Privatization in Developing States
To Build or To Buy: Understanding the Determinants of Security Privatization in Developing States Open
This code allows replication of the analysis in Becker's (2015) "To Build or To Buy: Understanding the Determinants of Security Privatization in Developing States."