Abstract
The beneficiation of different size fractions (+5, -31mm) of coal using an air-fluidized bed dry dense-medium separator with silica/zircon sands as the fluidizing-bed medium has been studied. Particle size and bed height were found to strongly influence the efficiency of separation with the dry dense-medium separator. An increase in bubble size associated with increase in bed height to 15cm results in density variations within the bed that increase the probable error for deeper fluidized beds for the smaller particles up to 0.19 from 0.06 for the shallower 10cm bed. Good agreement was found between the theoretical yield and ash content obtained from washability curves (produced from conventional float/sink tests) and the actual yield from the dry fluid bed separation for the bulk coal sample. A comparison with industrial coal-washing unit operations indicates that dry dense-medium separations are a strong candidate as an energy- and resource-efficient alternative process.
| Original language | English |
|---|---|
| Pages (from-to) | 276-289 |
| Number of pages | 14 |
| Journal | International Journal of Coal Preparation and Utilization |
| Volume | 32 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jan 1 2012 |
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Keywords
- Beneficiation
- Coal
- Density separator
- Dry separation
- Fluidized bed
- Washing
ASJC Scopus subject areas
- Chemical Engineering(all)
- Geotechnical Engineering and Engineering Geology
- Energy Engineering and Power Technology
- Fuel Technology
- Mechanical Engineering
Cite this
Beneficiation of coarse coal ore in an air-fluidized bed dry dense-medium separator. / Firdaus, Muhamad; O'Shea, John Paul; Oshitani, Jun; Franks, George V.
In: International Journal of Coal Preparation and Utilization, Vol. 32, No. 6, 01.01.2012, p. 276-289.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Beneficiation of coarse coal ore in an air-fluidized bed dry dense-medium separator
AU - Firdaus, Muhamad
AU - O'Shea, John Paul
AU - Oshitani, Jun
AU - Franks, George V.
PY - 2012/1/1
Y1 - 2012/1/1
N2 - The beneficiation of different size fractions (+5, -31mm) of coal using an air-fluidized bed dry dense-medium separator with silica/zircon sands as the fluidizing-bed medium has been studied. Particle size and bed height were found to strongly influence the efficiency of separation with the dry dense-medium separator. An increase in bubble size associated with increase in bed height to 15cm results in density variations within the bed that increase the probable error for deeper fluidized beds for the smaller particles up to 0.19 from 0.06 for the shallower 10cm bed. Good agreement was found between the theoretical yield and ash content obtained from washability curves (produced from conventional float/sink tests) and the actual yield from the dry fluid bed separation for the bulk coal sample. A comparison with industrial coal-washing unit operations indicates that dry dense-medium separations are a strong candidate as an energy- and resource-efficient alternative process.
AB - The beneficiation of different size fractions (+5, -31mm) of coal using an air-fluidized bed dry dense-medium separator with silica/zircon sands as the fluidizing-bed medium has been studied. Particle size and bed height were found to strongly influence the efficiency of separation with the dry dense-medium separator. An increase in bubble size associated with increase in bed height to 15cm results in density variations within the bed that increase the probable error for deeper fluidized beds for the smaller particles up to 0.19 from 0.06 for the shallower 10cm bed. Good agreement was found between the theoretical yield and ash content obtained from washability curves (produced from conventional float/sink tests) and the actual yield from the dry fluid bed separation for the bulk coal sample. A comparison with industrial coal-washing unit operations indicates that dry dense-medium separations are a strong candidate as an energy- and resource-efficient alternative process.
KW - Beneficiation
KW - Coal
KW - Density separator
KW - Dry separation
KW - Fluidized bed
KW - Washing
UR - http://www.scopus.com/inward/record.url?scp=84868678515&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84868678515&partnerID=8YFLogxK
U2 - 10.1080/19392699.2012.716801
DO - 10.1080/19392699.2012.716801
M3 - Article
AN - SCOPUS:84868678515
VL - 32
SP - 276
EP - 289
JO - International Journal of Coal Preparation and Utilization
JF - International Journal of Coal Preparation and Utilization
SN - 1939-2699
IS - 6
ER -