Air Classifiers

Two classifying stages in one compact housing

The grinding circuits' efficiency is especially limited by the efficiency of the air classifier. Due to the special requirements of the air classifying system within a High Pressure Grinding Roll (HPGR) circuit, Köppern developed the 2-Stage Koesep.

The patented set-up of this special air classifier combines a deagglomeration and coarse separation in a static cascade classifying stage with a fine separation in a high efficiency dynamic classifying stage. The special feature of the 2-Stage Koesep is the very compact design. Therefore it is also well suited to upgrade existing grinding plants.

With the 2-Stage Koesep the HPGR can be operated in semi-finish grinding mode with one air classifier only. Particles with product fineness are discharged from the grinding circuit early, the ball mill is relieved. This results in a lower specific energy consumption of the whole grinding system and an increased overall throughput.

Research and Development

High-pressure comminution process research is a fundamental element of process design in the cement and ore mining industry. Köppern has several semi-industrial pilot-plant facilities installed at the Bergakademie Freiberg, the University of British Columbia (Canada),  ALS Ammtec (Perth, Australia)  and TOMS (Irkutsk, Russia).

Read more about R&D