The details make the difference:
Christian Pfeiffer´s fourth generation intermediate diaphragms feature adjustable material flow control with separate transfer of air and material. More slots in the diaphragm plates and an optimized, enlarged diaphragm center lead to a significantly better mill ventilation. But the highlight of the intermediate diaphragm is the material transfer below the central air flow. This ensures a constant material level in both grinding compartments. The pre-ground material falls directly behind the intermediate diaphragm in the second grinding compartment. Zones with very little or no material being ground behind the intermediate diaphragm are avoided, wear on the grinding balls is reduced and grinding energy is saved. The entire grinding track of the second compartment is used for the grinding process.
The ideal complement to this intermediate diaphragm is the CSL lining, a compact spiral lining. The plow plates of this lining can be combined with low lifter or wave plates. The advantage of this lining system is its significantly lower volume compared to conventional alternative systems. Consequently, more grinding balls can be fed, resulting in a higher grinding performance. The large number of wave or lifter plates ensures that the ball charge of small balls is moved in an optimal way, and the spirally arranged plow plates increase the energy transfer, too.
As a result, with this component package of Christian Pfeiffer´s intermediate diaphragm and CSL spiral lining, performance improvements of 12% or even more can easily be achieved.