Intermediate diaphragm
Material flow control and grain size limitation

Thanks to the material flow control and the limitation of the largest grain size by the intermediate diaphragm, the material stays in the first grinding compartment until it reaches optimum size; only then it moves into the second compartment  The separation of air and material flow, a major development by Christian Pfeiffer, ensures that so-called dead zones (zones without material being ground) directly behind the intermediate diaphragm are avoided. The result is a clearly more efficient grinding process.

Technical details

  • Separation of the ball mill into two (or three) compartment using the intermediate diaphragm
  • Each compartment is filled with different ball charges and sizes
  • Optimum material flow control and grain size limitation
  • Unique separation of air and material flows in the low-wear material flow control: Avoidance of dead zones and lower wear on the grinding balls on the intermediate diaphragm – use of the entire grinding length of the second (and third) grinding compartment
  • 'Floating' installation reduces tension between the mill tube and the diaphragm structure. In this way: There is no tension between the intermediate diaphragm and the mill tube, the mill tube is stabilized, while at the same time, relative movements and deformations of the diaphragm are avoided
  • The structure of the intermediate diaphragm in the Monobloc® version supports the mill tube and works against deformation
  • Easier maintenance and replacement of main wear zones through division of the slotted and backside plates into two to four rings