Recovery of Rare Earth Elements by J Nkuna.pdf
Flotation, calcination and leaching tests on run of mine and discard coal, with mineralogy of the rare earth bearing grains. For processing researchers and waste stream owners.
Run of mine and discard coal carried total rare earth contents of 260 and 265 ppm, above the 130 ppm cut off grade used for coal. Flotation with an emulsion binder did not raise those concentrations in either the product or the tailings streams. Calcination did, lifting totals to between 285 and 289 ppm, with most rare earths leaching within the first fifteen minutes.
R1500,00
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Flammability, corrosion resistance and environment by V Mhlawakhe.pdf
Laboratory work turning high ash coal fines into moulded building composites, comparing coal tar pitch against a silicone binder, with strength, burning, corrosion and leaching tests. For product developers.
What this report foundAir blowing converted coal tar into a pitch with 11.27% volatile matter and 87.68% fixed carbon, which bound high ash coal fines into structural composites.
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Air blowing converted coal tar into a pitch with 11.27% volatile matter and 87.68% fixed carbon, which bound high ash coal fines into structural composites. Compressive strengths ran from 106.58 to 344.71 MPa and flexural strengths from 48.75 to 159.30 MPa. Flammability was low across all composites and corrosion rates stayed below those of some commercial ceramic tiles.
Beneficiation of weathered ultra-fine discard with an advanced High internal phase water-in-oil technique
2022
Laboratory flotation test work on five weathered discard samples, comparing an emulsion binder with kerosene and optimising dosage and agitation speed. For plants looking at fine discard dumps.
What this report foundA high internal phase water in oil emulsion binder upgraded weathered ultra fine coal discard.
R1500,00
A high internal phase water in oil emulsion binder upgraded weathered ultra fine coal discard. At 5 kg/ton on a feed of 29.34 per cent ash and 20.94 MJ/kg, flotation gave a clean coal of 11.76 per cent ash and 28.61 MJ/kg at 15.61 per cent mass yield. Calorific value rose with agitation speed and fell with binder dosage.
Zaalklapspruit Wetland Before and After Rehabilitation
2015
Field assessment of a wetland in the Mpumalanga coalfields, drawing on water chemistry and biological indicators, aimed at mining companies and licensing authorities.
What this report foundEcological integrity of a Mpumalanga wetland affected by coal mining was assessed before and after rehabilitation, using water quality, bacterial consortium...
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Ecological integrity of a Mpumalanga wetland affected by coal mining was assessed before and after rehabilitation, using water quality, bacterial consortium, freshwater algae and vegetation indicators. The work sits within a wider programme to give the coal sector and regulators practical ways of limiting and mitigating mining impacts on wetlands.