| 摘要 |
A fluidized bed separator is disclosed, for use in dry processing of a mixture of solid particles of different specific weight. The suspension bed of the separator is associated with an air deck operating with a single-particle-layer and adapted to receive heavy particle fraction discharged from the suspension bed and still containing a small portion of light particles. The air deck operates such that a pure heavy particle fraction travels in a direction opposite to that of light particle fraction, the latter being recirculated to the suspension table as it still contains a small portion of tiny heavy particles. Since the air deck is preferably secured to the suspension table, the reciprocating drive of the table also drives the deck, the level of the deck relative to the suspension table is selectively adjustable. The device is extremely simple compared with prior art and is more universal as its operation is virtually independent on the shape of particles of the respective fractions. It is particularly suitable in processing mixtures having relatively small volume of heavy particles, wherein a pure heavy particle fraction is to be obtained. |
