Fine Coal Dense-medium Cyclone Tests Conducted at Leeuwpan Coal Mine
200720 pages
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.
by GJ de Korte | January 2007
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.
Contents
- 1. Introduction3
- 2. Coal quality4
- 3. Spiral Circuit5
- 4. Sampling5
- 5. Spiral and dense-medium cyclone compared6
- 6. Demagnetizing coil10
- 7. Grootegeluk test11
- 8. JK Cyclone Test13
- 9. Extended runs17
- Magnetic separator efficiency18
How it opens
Upon completion of the test work at Navigation, the Coaltech 2020 fine coal dense-medium plant was re-located to Leeuwpan Mine for the next phase of test work. The move of the plant was initially planned for the last quarter of 2005 but was delayed as a result of the commissioning of the new jig plant at Leeuwpan. The plant was transported to Leeuwpan during January 2006.
How it concludes
R1500,00
Description
Related Products
A diatom based index for pans impacted by acid mine drainage
2021
Wet and dry season sampling of epiphytic diatoms from reed, salt and grass pans on the Mpumalanga Highveld, validating a biomonitoring index for mine affected depressional wetlands.
What this report foundLevel of acid mine drainage disturbance explained more of the variation in diatom communities than any other factor, with pan type second and season not...
R1500,00
Level of acid mine drainage disturbance explained more of the variation in diatom communities than any other factor, with pan type second and season not significant. Sulphate and calcium concentrations and sulphate to chloride ratios were higher in disturbed pans of every type. Pan type specific indices were tested against established riverine indices.
Models for Predicting Methane Gas Release from Coal Seams
2005
Emission factors and calculation models for national greenhouse gas reporting, built from mine seam gas measurements and ventilation sampling, for environmental staff and inventory compilers.
What this report foundEmission factors derived from measured South African seam gas data give simple models for methane released by underground mining, surface mining and coal after...
R1500,00
Emission factors derived from measured South African seam gas data give simple models for methane released by underground mining, surface mining and coal after mining. Applied across the industry they put total methane emissions at 52 000 to 93 000 tons a year. The models follow the IPCC Tier 2 approach using country specific factors.
Cost Evaluation of Different Medium Solids for Air Dense Medium Fluidized Bed Coal Separation
2017
University laboratory work on air fluidised bed separation, testing pyrrhotite, blast furnace slag, silica sand and coal discards against magnetite, for engineers considering waterless coal washing.
What this report foundMagnetite and pyrrhotite each gave the most uniform and stable fluidised bed densities, with bed density variation under 0.7 per cent.
R1500,00
Magnetite and pyrrhotite each gave the most uniform and stable fluidised bed densities, with bed density variation under 0.7 per cent. A pyrrhotite and magnetite blend at a weight ratio of 40:60 beat magnetite alone, producing a product of 14.50% ash and 27.30 MJ/kg from a feed of 39.27% ash and 18.76 MJ/kg.