Plant and Machinery

Set-up and operation of the 2-Stage Koesep

The 2-Stage Koesep includes two separation stages in only one housing.

First the product of the HPGR is fed into the static part for deagglomeration and coarse separation.

Coarse rejects of the static stage, so called coarse grits, are discharged and fed back to the HPGR for regrinding. Finer material enters the dynamic stage. Particles that are rejected by the rotating cage are discharged as fine grits for regrinding in the ball mill or in both ball mill and HPGR.

The ball mill's discharge material is directly fed onto a dispersion plate in the dynamic stage. All material of product fineness passes the rotating cage and is discharged together with the separation air.

As a major advantage this combined separator needs only one air circuit and thus only one fan for both separation stages.

The set-up of the 2-Stage Koesep is patented in Germany (DE 10 2011 055 762 B4) and Europe (EP 2 758 472 B1). Other patents are pending.


Click on the illustration for more details
2-Stage Koesep for Cement Grinding Circuits
01__2-Stage_Koesep_total_view_01.jpg 02__Static_Stage_01.jpg 03__Dynamic_Stage_01.jpg 04__Outer_Cone_01.jpg 05__Inner_Cone_01.jpg
original Static Stage Dynamic Stage Outer Shell Inner Shell

This very compact design makes the 2-Stage Koesep also well suited for plant modernizations. Existing cement plants operating with a ball mill in closed circuit and a separator or even with an HPGR in pre-grinding mode can be upgraded to a system with an HPGR in semi-finish grinding mode.

Due to the special construction of the 2-Stage Koesep only minimal space is required for the separation system. The low overall height helps saving investment cost for buildings and conveying systems.


Read more about plant upgrades