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The pseudo-fluid characteristics of the gas–solid separation fluidized bed provide a set of feasible methods for the dry separation of coal. The equipment used in the development of dry separation technology is receiving increasing attention around the world, because it generates no pollution during the separation process. However, the industrial application of related technologies using multi-component, complex fluidization equipment has met with considerable resistance. In recent years, a series of advances and achievements has been made in the study of the structural design, fluidization characteristics, and coal separation performance of the gas–solid separation fluidized bed. With respect to the historical development of gas–solid separation fluidized equipment and related progress in basic theoretical research, this paper summarizes the recent developments of the common gas–solid fluidized bed, vibratory fluidized bed, and magnetically stable fluidized bed. We comprehensively investigate the factors influencing the fluidized bed, and identify some problems that must be addressed to further advance the large-scale industrialization of the gas–solid separation fluidized bed.

Dry coal beneficiation technique in the gas–solid fluidized bed: a review