It is disclosed an apparatuswherein the gas enters from the opening 4located in a part of the compaction chamber3 and is dragged through a granulator 5, afractioning device 12, a special cyclone 11and a filter system 8A to a suction fan,which creates the gas stream. In such apparatusthe bulk to be compacted 1, the fineparticles to be compacted again and thecompacted bulk have the same flow directionthan the carrier gas. Due to its completeor partial impermeability, the structureof said apparatus makes also possible theuse of a gas different from normal air. Thisis important when the bulk is sensible tooxygen.
