Coaltech Research Association

Development of Junior Management and Supervisory Personnel for the Mining Section of the Future

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.

by A Crafford, L Smith and P F Stewart | April 2004

What this report found

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.

R1500,00

Description

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Unlocking obstacles to the commercialisation of eutectic freeze crystallisation

2022

Laboratory crystallisation cell tests on copper, brass, stainless steel and aluminium cooling plates in sodium sulphate solution, aimed at replacing mechanical scraping in brine treatment plants.

What this report foundHeat exchanger material governs how fast ice scale forms during eutectic freeze crystallisation of dilute brine.

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What this report found

Heat exchanger material governs how fast ice scale forms during eutectic freeze crystallisation of dilute brine. Induction time fell as thermal conductivity rose, so copper scaled first, while aluminium gave the lowest scaling rate because its low surface energy pushed ice crystallisation into the bulk. Stainless steel delayed onset but scaled heavily once nucleation started.

Fine Coal Dense-medium Cyclone Tests Conducted at Leeuwpan Coal Mine

GJ de Korte

2007

Pilot dense medium cyclone testing on fine coal inside a working spiral plant at a Mpumalanga opencast mine, ending in a full scale plant design.

What this report foundDense medium cyclones on the fine coal fraction lifted product yield well above the spiral circuit they were compared against and gave closer control of...

R1500,00

R1500,00

GJ de Korte

200720 pages

What this report found

Dense medium cyclones on the fine coal fraction lifted product yield well above the spiral circuit they were compared against and gave closer control of product quality. Cut point density control proved the hardest part of running the plant, medium properties being critical. Magnetic separator capacity had to match the duty, and a basement was needed to contain and recover medium spillage.

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