Conclusion.
Fine coal dry cleaning using the air dense medium fluidized bed has a lot of potential applications. In this study, ADMFB
processes were tested on a -6+3 mm fine coal using a 110-mm cylinder-shaped fluidized bed. The size fractions of magnetite
medium are -0.4+0.3 mm, -0.3+0.225 mm, -0.225+0.15 mm and -0.15+0.074 mm. Our experimental findings show that the
operational parameters including superficial air velocity and magnetite medium size have a significant impact on the bed
fluidization and coal separation. To improve the bed fluidization efficiencies of ADMFB, the initial bed height is needed to be
higher than 120 mm. And the pressure drop of fluidized bed is decreased gradually as the bed height goes up. According to the
experimental results, good separation efficiencies for -6+3 mm fine coal using ADMFB were achieved with magnetite powder
size of -0.15+0.074 mm and fluidizing time of 45 s.