Beneficiation of Coarse Coal Ore in an Air-Fluidized Bed Dry Dense-Medium Separator
Muhamad Firdaus, John-Paul O'Shea, Jun Oshitani, George V Franks
INTERNATIONAL JOURNAL OF COAL PREPARATION AND UTILIZATION | TAYLOR & FRANCIS INC | Published : 2012
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 conventi..View full abstract
Awarded by Japan Society for the Promotion of Science
Awarded by AREVA NC through the Australian Minerals Science Research Institute (AMSRI)
This study was supported by the Industrial Technology Research Grant Program in 2008 from the New Energy and Industrial Technology Development Organization (NEDO) of Japan, the Core-to-Core Program promoted by the Japan Society for the Promotion of Science (Project No. 18004), and the Australian Research Council, AMIRA International, BHP Billiton, Rio Tinto, Orica, Anglo Platinum, Xstrata, Freeport McMoran and AREVA NC through the Australian Minerals Science Research Institute (AMSRI) (LP0667828). Thanks to Anglo Coal Pty Ltd. and Matthew Griffin for supplying the coal ore. We thank Dr. Elizaveta Forbes for her assistance in statistical analysis.