Elutriation characteristics of coal fines from a fluidized bed is experimentally investigated in a 6.8 cm ID ×135 cm height fluidized bed combustor, using a low grade anthracite, which has heating value around 2,000 Kcal/Kg and negligible amount of attrition of particles during combustion. The particle size distribution resulting from grinding coal showed Rosin-Rammler distribution with a coefficient of variation 85 %.
It was also found that various existing correlations for predicting elutriation of fines from fluidized beds do not properly fit the real data which are obtained from the present study.
Finally, a correlation more applicable to actual systems is presented for the elutriation from fluidized bed by employing sand sample which is similar to real coal in particle size distribution of Rosin-Rammler.
Comparisons between the correlation and experimental data are in good agreement.