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Separation Science and Technology, Vol.52, No.5, 958-964, 2017
Physical separation using an autogenous medium on coal
The dry beneficiation for 1-5 and 5-10-mm-size coal using an air table was investigated. Separation was conducted using autogenously formed media in the feed coal. The separation density was around 1.8-2.0 g/cm(3) and the average Ep (Ecart Probability) value ranged from 0.08-0.1 for the 5-10-mm fraction, to around 0.1-0.12 for the 1-5-mm fraction. For the 5-10-mm fraction, the feed ash decreased from 44% to 8.4% in the clean coal product, with 89.5% ash rejection rate in the rejects. For the 1-5-mm fraction, the feed ash decreased from 33.7% to 9.4%, and the reject ash was 88.7%.