重力选矿的设备形式多样，品种繁多，立轮重介质分选机就是重力选矿的重要设备。
There are different species and diversities of gravity mine equipment and vertical-wheel dense media size classification machine is one of the important one of them.
本文在分析气固流化床特性的基础上，对流化床干法分选理论进行了深入研究，揭示了空气重介质流化床的分选机理。
The paper introduces the theory of coal dry seperation and the mechanism of fluidized bed using gas as heavy medium.
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