Coal Processing
FGX Dry Processing Tests Conducted at Exxaro R&D
2009
Pilot tests of a waterless de-stoning unit on raw coals from four South African collieries at a Pretoria research site, for plant metallurgists weighing dry beneficiation.
What this report foundA compound dry cleaning machine de-stoned low grade raw coal without using water, but separation efficiency was low, with high relative density cut points and...
Fine Coal Dense-medium Cyclone Tests Conducted at Leeuwpan Coal Mine
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...
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.
Hydrothermal Treatment of Coal Discards and Sewage Sludge for the Production of Advanced Materials
2023
Laboratory carbonisation tests on discard and slurry samples blended with sewage sludge, with the resulting chars tested as adsorbents for dissolved pharmaceuticals. For waste and water treatment planners.
What this report foundCo-treating coal discards with sewage sludge by hydrothermal carbonisation gave hydrochars with better physicochemical properties than treating either waste...
Real-time Plant Efficiency Measurement
2002
Assessment of the measurement and control equipment available to coal preparation plants, with recommendations for plant metallurgists on which instruments to add first.
What this report foundNo single method gives a continuous, real time report on how a coal preparation plant is performing.
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.
The Amenability of Some South African Bituminous Coals to Binderless Briquetting
2001
Laboratory compaction work with testing of compressive, abrasion and water resistance, giving steam and metallurgical coal producers a basis for judging which fines can be agglomerated.
What this report foundNine bituminous coals from the Witbank, Waterberg and Soutpansberg coalfields all formed compacts without a binder, and the process worked better with coking...
TRI-FLO™ Tests Conducted at South Witbank Coal Mine
2003
Trial of an imported dense medium separator installed in a fine coal pilot plant at a Witbank mine, for plant designers weighing alternatives to cyclones.
What this report foundThe separator handled fine coal and produced a 28 MJ/kg product, but its measured separation efficiency was lower than that of conventional dense medium...
Upgrading of coal fines with a Centrifugal Concentrator
Bench and pilot testing of four centrifugal concentrator models on fine coal from two collieries, with operating variables that resisted correlation flagged for further work. For plant metallurgists.
What this report foundFour centrifugal concentrators all cut ash in fine coal, with desliming the decisive step.