oa South African Journal of Chemical Engineering - Applicability of the air dense medium fluidized bed separator for cleaning of high-ash Indian thermal coals : an experimental study
The air dense medium fluidized bed separator which has been developed for the dry beneficiation of coal and recognized as a low cost and high efficiency process. In some cases the efficient beneficiation process are not found to be very effective for the Indian coals due to their typical washability characteristics. So a systematic study has been carried out to verify the suitability of this process by considering three different Indian coals of different characteristics. The results show that this separation process is quite efficient for the beneficiation of coal in the size range of -50+25 mm with Ep values in the range of 0.037-0.055. However, lower separation efficiency for finer coal of -13+4.75 mm size indicates towards the non-suitability of the process. Based on this study, the air dense medium separation process was established to be a possible alternative to the conventional wet beneficiation method for processing coarser size Indian coals.
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