| 摘要 |
A screening apparatus has a generally closed housing and partitions in the housing forming a fine-particle passage having an upstream end and a downstream end and a coarse-particle passage having an upstream end and a downstream end. A screen at the upstream ends is fed particulate material including dust and fine and coarse particles such that the coarse particles are diverted to the coarse-particle passage and the fine particles and dust to the fine-particle passage. A air-classifier in the fine-particle passage dedusts particles therein.
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