Critical Geotechnical Factors Impacting on Reserves in Previously Mined Areas in the Northern Witbank-highveld Coalfield
by Lesley S Jeffrey | September 2000
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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.
What this report foundRun 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.
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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.
Wetland rehabilitation with Dongalock shutters
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Two field trials, one on a mine affected wetland and one on an undisturbed site, both built by community members, plus a desktop comparison against engineering and cost criteria.
What this report foundCompared against concrete and gabions on cost, construction time, footprint, durability and safety, the Dongalock product proved cheaper and quicker to install...
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Compared against concrete and gabions on cost, construction time, footprint, durability and safety, the Dongalock product proved cheaper and quicker to install in small and medium incised valley bottom wetlands, and needs no heavy plant, so local enterprises can build it. Concrete still suits large wetlands carrying high water velocities.
Development of Junior Management and Supervisory Personnel for the Mining Section of the Future
2004
Interviews, questionnaires and on site observation at three South African collieries, with recommended training content and selection criteria for supervisors and junior managers in mining sections.
What this report foundMines already provide substantial training and their junior managers were found motivated and committed, yet development at this level remains problematic.
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Mines already provide substantial training and their junior managers were found motivated and committed, yet development at this level remains problematic. Gaps sat in commercial exposure, financial and accounting skills, industrial relations, quality standards, administration and project management. The report sets out the attributes to screen for at appointment and a framework that makes candidates responsible for their own development.