Coal-milling plant with grit recirculation and separation of pyrite and mine-waste

摘要

In a coal-milling plant with a crushing mill (1) and a sifter (25) material discharged from mill 1 and conveyed to the sifter by an adjustable carrier air flow, the fine-crushed material is carried out of the plant, and the coarse material is recirculated to the crushing mill. Only coarsely crushed coal is recycled to mill material leaving the mill (1) is accelerated in a nozzle (15) and directed to an impact device (16) with at least one impact plate (21) which may be a variable speed rotor. A collection port (29) to convey away the material collected is connected downstream of the impact device in the direction of rebound. IMAGE